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authormmel <mmel@FreeBSD.org>2016-01-29 10:31:54 +0000
committermmel <mmel@FreeBSD.org>2016-01-29 10:31:54 +0000
commiteec4d6c02731c54b0bb31053c7517dae8498e8aa (patch)
treefea063924632398a9b978c5e11bc4a13f90572b9
parent46cf14d7bf24ebbb83d9692b2acabdb324575f1b (diff)
downloadFreeBSD-src-eec4d6c02731c54b0bb31053c7517dae8498e8aa.zip
FreeBSD-src-eec4d6c02731c54b0bb31053c7517dae8498e8aa.tar.gz
ARM: remove old pmap-v6 code. The new pmap-v6 is mature enough, and
dual implementation is showstopper for major cleanup. This patch only removes old code from tree. Cleanups will follow asap.
-rw-r--r--sys/arm/arm/genassym.c6
-rw-r--r--sys/arm/arm/locore-v6.S22
-rw-r--r--sys/arm/arm/machdep.c12
-rw-r--r--sys/arm/arm/mem.c3
-rw-r--r--sys/arm/arm/mp_machdep.c9
-rw-r--r--sys/arm/arm/pmap-v6.c5452
-rw-r--r--sys/arm/arm/swtch.S6
-rw-r--r--sys/arm/arm/trap-v6.c9
-rw-r--r--sys/arm/conf/std.armv62
-rw-r--r--sys/arm/include/machdep.h4
-rw-r--r--sys/arm/include/pmap.h8
-rw-r--r--sys/arm/include/pte.h8
-rw-r--r--sys/arm/include/sf_buf.h6
-rw-r--r--sys/arm/include/vm.h8
-rw-r--r--sys/conf/files.arm3
-rw-r--r--sys/conf/options.arm1
16 files changed, 44 insertions, 5515 deletions
diff --git a/sys/arm/arm/genassym.c b/sys/arm/arm/genassym.c
index 659c471..a5d2f6b 100644
--- a/sys/arm/arm/genassym.c
+++ b/sys/arm/arm/genassym.c
@@ -61,16 +61,16 @@ __FBSDID("$FreeBSD$");
ASSYM(KERNBASE, KERNBASE);
ASSYM(PCB_NOALIGNFLT, PCB_NOALIGNFLT);
-#ifdef ARM_NEW_PMAP
+#if __ARM_ARCH >= 6
ASSYM(CPU_ASID_KERNEL,CPU_ASID_KERNEL);
#endif
ASSYM(PCB_ONFAULT, offsetof(struct pcb, pcb_onfault));
-#ifndef ARM_NEW_PMAP
+#if __ARM_ARCH < 6
ASSYM(PCB_DACR, offsetof(struct pcb, pcb_dacr));
#endif
ASSYM(PCB_FLAGS, offsetof(struct pcb, pcb_flags));
ASSYM(PCB_PAGEDIR, offsetof(struct pcb, pcb_pagedir));
-#ifndef ARM_NEW_PMAP
+#if __ARM_ARCH < 6
ASSYM(PCB_L1VEC, offsetof(struct pcb, pcb_l1vec));
ASSYM(PCB_PL1VEC, offsetof(struct pcb, pcb_pl1vec));
#endif
diff --git a/sys/arm/arm/locore-v6.S b/sys/arm/arm/locore-v6.S
index b66b601..eda6014 100644
--- a/sys/arm/arm/locore-v6.S
+++ b/sys/arm/arm/locore-v6.S
@@ -30,6 +30,7 @@
#include "assym.s"
#include <sys/syscall.h>
+#include <machine/acle-compat.h>
#include <machine/asm.h>
#include <machine/asmacros.h>
#include <machine/armreg.h>
@@ -39,11 +40,6 @@
__FBSDID("$FreeBSD$");
-#ifndef ARM_NEW_PMAP
-#define PTE1_OFFSET L1_S_OFFSET
-#define PTE1_SHIFT L1_S_SHIFT
-#define PTE1_SIZE L1_S_SIZE
-#endif
#if __ARM_ARCH >= 7
#if defined(__ARM_ARCH_7VE__) || defined(__clang__)
@@ -287,7 +283,6 @@ ASENTRY_NP(init_mmu)
mov r0, #((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT)
mcr CP15_DACR(r0)
-#ifdef ARM_NEW_PMAP
/*
* Set TEX remap registers
* - All is set to uncacheable memory
@@ -296,7 +291,6 @@ ASENTRY_NP(init_mmu)
mcr CP15_PRRR(r0)
mov r0, #0
mcr CP15_NMRR(r0)
-#endif
mcr CP15_TLBIALL /* Flush TLB */
DSB
ISB
@@ -305,9 +299,7 @@ ASENTRY_NP(init_mmu)
mrc CP15_SCTLR(r0)
orr r0, r0, #CPU_CONTROL_MMU_ENABLE
orr r0, r0, #CPU_CONTROL_V6_EXTPAGE
-#ifdef ARM_NEW_PMAP
orr r0, r0, #CPU_CONTROL_TR_ENABLE
-#endif
orr r0, r0, #CPU_CONTROL_AF_ENABLE
mcr CP15_SCTLR(r0)
DSB
@@ -398,23 +390,11 @@ END(reinit_mmu)
* Addresses must be 1MiB aligned
*/
build_device_pagetables:
-#if defined(ARM_NEW_PMAP)
ldr r4, =PTE1_V|PTE1_A|PTE1_AP_KRW|TEX1_CLASS_0
-#elif defined(SMP)
- ldr r4, =(L1_TYPE_S|L1_S_AP(AP_KRW)|L1_SHARED)
-#else
- ldr r4, =(L1_TYPE_S|L1_S_AP(AP_KRW))
-#endif
b 1f
build_pagetables:
/* Set the required page attributed */
-#if defined(ARM_NEW_PMAP)
ldr r4, =PTE1_V|PTE1_A|PTE1_AP_KRW|TEX1_CLASS_0
-#elif defined(SMP)
- ldr r4, =(L1_TYPE_S|L1_S_C|L1_S_AP(AP_KRW)|L1_SHARED)
-#else
- ldr r4, =(L1_TYPE_S|L1_S_C|L1_S_AP(AP_KRW))
-#endif
1:
orr r1, r4
diff --git a/sys/arm/arm/machdep.c b/sys/arm/arm/machdep.c
index d2811a6..52413b8 100644
--- a/sys/arm/arm/machdep.c
+++ b/sys/arm/arm/machdep.c
@@ -199,7 +199,7 @@ static char *loader_envp;
vm_paddr_t pmap_pa;
-#ifdef ARM_NEW_PMAP
+#if __ARM_ARCH >= 6
vm_offset_t systempage;
vm_offset_t irqstack;
vm_offset_t undstack;
@@ -456,7 +456,7 @@ cpu_startup(void *dummy)
pcb->pcb_regs.sf_sp = (u_int)thread0.td_kstack +
USPACE_SVC_STACK_TOP;
pmap_set_pcb_pagedir(pmap_kernel(), pcb);
-#ifndef ARM_NEW_PMAP
+#if __ARM_ARCH < 6
vector_page_setprot(VM_PROT_READ);
pmap_postinit();
#endif
@@ -1283,7 +1283,7 @@ arm_predict_branch(void *cookie, u_int insn, register_t pc, register_t *new_pc,
}
}
-#ifdef ARM_NEW_PMAP
+#if __ARM_ARCH >= 6
void
set_stackptrs(int cpu)
{
@@ -1447,7 +1447,7 @@ print_kenv(void)
debugf(" %x %s\n", (uint32_t)cp, cp);
}
-#ifndef ARM_NEW_PMAP
+#if __ARM_ARCH < 6
void *
initarm(struct arm_boot_params *abp)
{
@@ -1717,7 +1717,7 @@ initarm(struct arm_boot_params *abp)
return ((void *)(kernelstack.pv_va + USPACE_SVC_STACK_TOP -
sizeof(struct pcb)));
}
-#else /* !ARM_NEW_PMAP */
+#else /* __ARM_ARCH < 6 */
void *
initarm(struct arm_boot_params *abp)
{
@@ -1905,7 +1905,7 @@ initarm(struct arm_boot_params *abp)
}
-#endif /* !ARM_NEW_PMAP */
+#endif /* __ARM_ARCH < 6 */
#endif /* FDT */
uint32_t (*arm_cpu_fill_vdso_timehands)(struct vdso_timehands *,
diff --git a/sys/arm/arm/mem.c b/sys/arm/arm/mem.c
index 2e4128b..1218ea4 100644
--- a/sys/arm/arm/mem.c
+++ b/sys/arm/arm/mem.c
@@ -63,6 +63,7 @@ __FBSDID("$FreeBSD$");
#include <vm/pmap.h>
#include <vm/vm_extern.h>
+#include <machine/acle-compat.h>
#include <machine/memdev.h>
#include <machine/vmparam.h>
@@ -113,7 +114,7 @@ memrw(struct cdev *dev, struct uio *uio, int flags)
return (EINVAL);
sx_xlock(&tmppt_lock);
pmap_kenter((vm_offset_t)_tmppt, v);
-#ifdef ARM_NEW_PMAP
+#if __ARM_ARCH >= 6
pmap_tlb_flush(kernel_pmap, (vm_offset_t)_tmppt);
#endif
o = (int)uio->uio_offset & PAGE_MASK;
diff --git a/sys/arm/arm/mp_machdep.c b/sys/arm/arm/mp_machdep.c
index 463a00a..3661866 100644
--- a/sys/arm/arm/mp_machdep.c
+++ b/sys/arm/arm/mp_machdep.c
@@ -43,6 +43,7 @@ __FBSDID("$FreeBSD$");
#include <vm/vm_kern.h>
#include <vm/pmap.h>
+#include <machine/acle-compat.h>
#include <machine/armreg.h>
#include <machine/cpu.h>
#include <machine/cpufunc.h>
@@ -155,7 +156,7 @@ init_secondary(int cpu)
#ifndef ARM_INTRNG
int start = 0, end = 0;
#endif
-#ifdef ARM_NEW_PMAP
+#if __ARM_ARCH >= 6
uint32_t actlr_mask, actlr_set;
pmap_set_tex();
@@ -167,11 +168,11 @@ init_secondary(int cpu)
set_stackptrs(cpu);
enable_interrupts(PSR_A);
-#else /* ARM_NEW_PMAP */
+#else /* __ARM_ARCH >= 6 */
cpu_setup();
setttb(pmap_pa);
cpu_tlb_flushID();
-#endif /* ARM_NEW_PMAP */
+#endif /* __ARM_ARCH >= 6 */
pc = &__pcpu[cpu];
/*
@@ -183,7 +184,7 @@ init_secondary(int cpu)
pcpu_init(pc, cpu, sizeof(struct pcpu));
dpcpu_init(dpcpu[cpu - 1], cpu);
-#ifndef ARM_NEW_PMAP
+#if __ARM_ARCH < 6
/* Provide stack pointers for other processor modes. */
set_stackptrs(cpu);
#endif
diff --git a/sys/arm/arm/pmap-v6.c b/sys/arm/arm/pmap-v6.c
deleted file mode 100644
index 5d70211..0000000
--- a/sys/arm/arm/pmap-v6.c
+++ /dev/null
@@ -1,5452 +0,0 @@
-/* From: $NetBSD: pmap.c,v 1.148 2004/04/03 04:35:48 bsh Exp $ */
-/*-
- * Copyright 2011 Semihalf
- * Copyright 2004 Olivier Houchard.
- * Copyright 2003 Wasabi Systems, Inc.
- * All rights reserved.
- *
- * Written by Steve C. Woodford for Wasabi Systems, Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed for the NetBSD Project by
- * Wasabi Systems, Inc.
- * 4. The name of Wasabi Systems, Inc. may not be used to endorse
- * or promote products derived from this software without specific prior
- * written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
- * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
- * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- * From: FreeBSD: src/sys/arm/arm/pmap.c,v 1.113 2009/07/24 13:50:29
- */
-
-/*-
- * Copyright (c) 2002-2003 Wasabi Systems, Inc.
- * Copyright (c) 2001 Richard Earnshaw
- * Copyright (c) 2001-2002 Christopher Gilbert
- * All rights reserved.
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. The name of the company nor the name of the author may be used to
- * endorse or promote products derived from this software without specific
- * prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
- * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-/*-
- * Copyright (c) 1999 The NetBSD Foundation, Inc.
- * All rights reserved.
- *
- * This code is derived from software contributed to The NetBSD Foundation
- * by Charles M. Hannum.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
- * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
- * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
- * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-/*-
- * Copyright (c) 1994-1998 Mark Brinicombe.
- * Copyright (c) 1994 Brini.
- * All rights reserved.
- *
- * This code is derived from software written for Brini by Mark Brinicombe
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by Mark Brinicombe.
- * 4. The name of the author may not be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- *
- * RiscBSD kernel project
- *
- * pmap.c
- *
- * Machine dependant vm stuff
- *
- * Created : 20/09/94
- */
-
-/*
- * Special compilation symbols
- * PMAP_DEBUG - Build in pmap_debug_level code
- *
- * Note that pmap_mapdev() and pmap_unmapdev() are implemented in arm/devmap.c
-*/
-/* Include header files */
-
-#include "opt_vm.h"
-#include "opt_pmap.h"
-
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/kernel.h>
-#include <sys/ktr.h>
-#include <sys/lock.h>
-#include <sys/proc.h>
-#include <sys/malloc.h>
-#include <sys/msgbuf.h>
-#include <sys/mutex.h>
-#include <sys/vmmeter.h>
-#include <sys/mman.h>
-#include <sys/rwlock.h>
-#include <sys/smp.h>
-#include <sys/sched.h>
-#include <sys/sysctl.h>
-
-#include <vm/vm.h>
-#include <vm/vm_param.h>
-#include <vm/uma.h>
-#include <vm/pmap.h>
-#include <vm/vm_kern.h>
-#include <vm/vm_object.h>
-#include <vm/vm_map.h>
-#include <vm/vm_page.h>
-#include <vm/vm_pageout.h>
-#include <vm/vm_phys.h>
-#include <vm/vm_extern.h>
-#include <vm/vm_reserv.h>
-
-#include <machine/md_var.h>
-#include <machine/cpu.h>
-#include <machine/cpufunc.h>
-#include <machine/pcb.h>
-
-#ifdef DEBUG
-extern int last_fault_code;
-#endif
-
-#ifdef PMAP_DEBUG
-#define PDEBUG(_lev_,_stat_) \
- if (pmap_debug_level >= (_lev_)) \
- ((_stat_))
-#define dprintf printf
-
-int pmap_debug_level = 0;
-#define PMAP_INLINE
-#else /* PMAP_DEBUG */
-#define PDEBUG(_lev_,_stat_) /* Nothing */
-#define dprintf(x, arg...)
-#define PMAP_INLINE __inline
-#endif /* PMAP_DEBUG */
-
-#ifdef PV_STATS
-#define PV_STAT(x) do { x ; } while (0)
-#else
-#define PV_STAT(x) do { } while (0)
-#endif
-
-#define pa_to_pvh(pa) (&pv_table[pa_index(pa)])
-
-#ifdef ARM_L2_PIPT
-#define pmap_l2cache_wbinv_range(va, pa, size) cpu_l2cache_wbinv_range((pa), (size))
-#define pmap_l2cache_inv_range(va, pa, size) cpu_l2cache_inv_range((pa), (size))
-#else
-#define pmap_l2cache_wbinv_range(va, pa, size) cpu_l2cache_wbinv_range((va), (size))
-#define pmap_l2cache_inv_range(va, pa, size) cpu_l2cache_inv_range((va), (size))
-#endif
-
-extern struct pv_addr systempage;
-
-/*
- * Internal function prototypes
- */
-
-static PMAP_INLINE
-struct pv_entry *pmap_find_pv(struct md_page *, pmap_t, vm_offset_t);
-static void pmap_free_pv_chunk(struct pv_chunk *pc);
-static void pmap_free_pv_entry(pmap_t pmap, pv_entry_t pv);
-static pv_entry_t pmap_get_pv_entry(pmap_t pmap, boolean_t try);
-static vm_page_t pmap_pv_reclaim(pmap_t locked_pmap);
-static boolean_t pmap_pv_insert_section(pmap_t, vm_offset_t,
- vm_paddr_t);
-static struct pv_entry *pmap_remove_pv(struct vm_page *, pmap_t, vm_offset_t);
-static int pmap_pvh_wired_mappings(struct md_page *, int);
-
-static int pmap_enter_locked(pmap_t, vm_offset_t, vm_page_t,
- vm_prot_t, u_int);
-static vm_paddr_t pmap_extract_locked(pmap_t pmap, vm_offset_t va);
-static void pmap_alloc_l1(pmap_t);
-static void pmap_free_l1(pmap_t);
-
-static void pmap_map_section(pmap_t, vm_offset_t, vm_offset_t,
- vm_prot_t, boolean_t);
-static void pmap_promote_section(pmap_t, vm_offset_t);
-static boolean_t pmap_demote_section(pmap_t, vm_offset_t);
-static boolean_t pmap_enter_section(pmap_t, vm_offset_t, vm_page_t,
- vm_prot_t);
-static void pmap_remove_section(pmap_t, vm_offset_t);
-
-static int pmap_clearbit(struct vm_page *, u_int);
-
-static struct l2_bucket *pmap_get_l2_bucket(pmap_t, vm_offset_t);
-static struct l2_bucket *pmap_alloc_l2_bucket(pmap_t, vm_offset_t);
-static void pmap_free_l2_bucket(pmap_t, struct l2_bucket *, u_int);
-static vm_offset_t kernel_pt_lookup(vm_paddr_t);
-
-static MALLOC_DEFINE(M_VMPMAP, "pmap", "PMAP L1");
-
-vm_offset_t virtual_avail; /* VA of first avail page (after kernel bss) */
-vm_offset_t virtual_end; /* VA of last avail page (end of kernel AS) */
-vm_offset_t pmap_curmaxkvaddr;
-vm_paddr_t kernel_l1pa;
-
-vm_offset_t kernel_vm_end = 0;
-
-vm_offset_t vm_max_kernel_address;
-
-struct pmap kernel_pmap_store;
-
-/*
- * Resources for quickly copying and zeroing pages using virtual address space
- * and page table entries that are pre-allocated per-CPU by pmap_init().
- */
-struct czpages {
- struct mtx lock;
- pt_entry_t *srcptep;
- pt_entry_t *dstptep;
- vm_offset_t srcva;
- vm_offset_t dstva;
-};
-static struct czpages cpu_czpages[MAXCPU];
-
-static void pmap_init_l1(struct l1_ttable *, pd_entry_t *);
-/*
- * These routines are called when the CPU type is identified to set up
- * the PTE prototypes, cache modes, etc.
- *
- * The variables are always here, just in case LKMs need to reference
- * them (though, they shouldn't).
- */
-static void pmap_set_prot(pt_entry_t *pte, vm_prot_t prot, uint8_t user);
-pt_entry_t pte_l1_s_cache_mode;
-pt_entry_t pte_l1_s_cache_mode_pt;
-
-pt_entry_t pte_l2_l_cache_mode;
-pt_entry_t pte_l2_l_cache_mode_pt;
-
-pt_entry_t pte_l2_s_cache_mode;
-pt_entry_t pte_l2_s_cache_mode_pt;
-
-struct msgbuf *msgbufp = 0;
-
-/*
- * Crashdump maps.
- */
-static caddr_t crashdumpmap;
-
-extern void bcopy_page(vm_offset_t, vm_offset_t);
-extern void bzero_page(vm_offset_t);
-
-char *_tmppt;
-
-/*
- * Metadata for L1 translation tables.
- */
-struct l1_ttable {
- /* Entry on the L1 Table list */
- SLIST_ENTRY(l1_ttable) l1_link;
-
- /* Entry on the L1 Least Recently Used list */
- TAILQ_ENTRY(l1_ttable) l1_lru;
-
- /* Track how many domains are allocated from this L1 */
- volatile u_int l1_domain_use_count;
-
- /*
- * A free-list of domain numbers for this L1.
- * We avoid using ffs() and a bitmap to track domains since ffs()
- * is slow on ARM.
- */
- u_int8_t l1_domain_first;
- u_int8_t l1_domain_free[PMAP_DOMAINS];
-
- /* Physical address of this L1 page table */
- vm_paddr_t l1_physaddr;
-
- /* KVA of this L1 page table */
- pd_entry_t *l1_kva;
-};
-
-/*
- * Convert a virtual address into its L1 table index. That is, the
- * index used to locate the L2 descriptor table pointer in an L1 table.
- * This is basically used to index l1->l1_kva[].
- *
- * Each L2 descriptor table represents 1MB of VA space.
- */
-#define L1_IDX(va) (((vm_offset_t)(va)) >> L1_S_SHIFT)
-
-/*
- * L1 Page Tables are tracked using a Least Recently Used list.
- * - New L1s are allocated from the HEAD.
- * - Freed L1s are added to the TAIl.
- * - Recently accessed L1s (where an 'access' is some change to one of
- * the userland pmaps which owns this L1) are moved to the TAIL.
- */
-static TAILQ_HEAD(, l1_ttable) l1_lru_list;
-/*
- * A list of all L1 tables
- */
-static SLIST_HEAD(, l1_ttable) l1_list;
-static struct mtx l1_lru_lock;
-
-/*
- * The l2_dtable tracks L2_BUCKET_SIZE worth of L1 slots.
- *
- * This is normally 16MB worth L2 page descriptors for any given pmap.
- * Reference counts are maintained for L2 descriptors so they can be
- * freed when empty.
- */
-struct l2_dtable {
- /* The number of L2 page descriptors allocated to this l2_dtable */
- u_int l2_occupancy;
-
- /* List of L2 page descriptors */
- struct l2_bucket {
- pt_entry_t *l2b_kva; /* KVA of L2 Descriptor Table */
- vm_paddr_t l2b_phys; /* Physical address of same */
- u_short l2b_l1idx; /* This L2 table's L1 index */
- u_short l2b_occupancy; /* How many active descriptors */
- } l2_bucket[L2_BUCKET_SIZE];
-};
-
-/* pmap_kenter_internal flags */
-#define KENTER_CACHE 0x1
-#define KENTER_DEVICE 0x2
-#define KENTER_USER 0x4
-
-/*
- * Given an L1 table index, calculate the corresponding l2_dtable index
- * and bucket index within the l2_dtable.
- */
-#define L2_IDX(l1idx) (((l1idx) >> L2_BUCKET_LOG2) & \
- (L2_SIZE - 1))
-#define L2_BUCKET(l1idx) ((l1idx) & (L2_BUCKET_SIZE - 1))
-
-/*
- * Given a virtual address, this macro returns the
- * virtual address required to drop into the next L2 bucket.
- */
-#define L2_NEXT_BUCKET(va) (((va) & L1_S_FRAME) + L1_S_SIZE)
-
-/*
- * We try to map the page tables write-through, if possible. However, not
- * all CPUs have a write-through cache mode, so on those we have to sync
- * the cache when we frob page tables.
- *
- * We try to evaluate this at compile time, if possible. However, it's
- * not always possible to do that, hence this run-time var.
- */
-int pmap_needs_pte_sync;
-
-/*
- * Macro to determine if a mapping might be resident in the
- * instruction cache and/or TLB
- */
-#define PTE_BEEN_EXECD(pte) (L2_S_EXECUTABLE(pte) && L2_S_REFERENCED(pte))
-
-/*
- * Macro to determine if a mapping might be resident in the
- * data cache and/or TLB
- */
-#define PTE_BEEN_REFD(pte) (L2_S_REFERENCED(pte))
-
-#ifndef PMAP_SHPGPERPROC
-#define PMAP_SHPGPERPROC 200
-#endif
-
-#define pmap_is_current(pm) ((pm) == pmap_kernel() || \
- curproc->p_vmspace->vm_map.pmap == (pm))
-
-/*
- * Data for the pv entry allocation mechanism
- */
-static TAILQ_HEAD(pch, pv_chunk) pv_chunks = TAILQ_HEAD_INITIALIZER(pv_chunks);
-static int pv_entry_count, pv_entry_max, pv_entry_high_water;
-static struct md_page *pv_table;
-static int shpgperproc = PMAP_SHPGPERPROC;
-
-struct pv_chunk *pv_chunkbase; /* KVA block for pv_chunks */
-int pv_maxchunks; /* How many chunks we have KVA for */
-vm_offset_t pv_vafree; /* Freelist stored in the PTE */
-
-static __inline struct pv_chunk *
-pv_to_chunk(pv_entry_t pv)
-{
-
- return ((struct pv_chunk *)((uintptr_t)pv & ~(uintptr_t)PAGE_MASK));
-}
-
-#define PV_PMAP(pv) (pv_to_chunk(pv)->pc_pmap)
-
-CTASSERT(sizeof(struct pv_chunk) == PAGE_SIZE);
-CTASSERT(_NPCM == 8);
-CTASSERT(_NPCPV == 252);
-
-#define PC_FREE0_6 0xfffffffful /* Free values for index 0 through 6 */
-#define PC_FREE7 0x0ffffffful /* Free values for index 7 */
-
-static const uint32_t pc_freemask[_NPCM] = {
- PC_FREE0_6, PC_FREE0_6, PC_FREE0_6,
- PC_FREE0_6, PC_FREE0_6, PC_FREE0_6,
- PC_FREE0_6, PC_FREE7
-};
-
-static SYSCTL_NODE(_vm, OID_AUTO, pmap, CTLFLAG_RD, 0, "VM/pmap parameters");
-
-/* Superpages utilization enabled = 1 / disabled = 0 */
-static int sp_enabled = 1;
-SYSCTL_INT(_vm_pmap, OID_AUTO, sp_enabled, CTLFLAG_RDTUN | CTLFLAG_NOFETCH, &sp_enabled, 0,
- "Are large page mappings enabled?");
-
-SYSCTL_INT(_vm_pmap, OID_AUTO, pv_entry_count, CTLFLAG_RD, &pv_entry_count, 0,
- "Current number of pv entries");
-
-#ifdef PV_STATS
-static int pc_chunk_count, pc_chunk_allocs, pc_chunk_frees, pc_chunk_tryfail;
-
-SYSCTL_INT(_vm_pmap, OID_AUTO, pc_chunk_count, CTLFLAG_RD, &pc_chunk_count, 0,
- "Current number of pv entry chunks");
-SYSCTL_INT(_vm_pmap, OID_AUTO, pc_chunk_allocs, CTLFLAG_RD, &pc_chunk_allocs, 0,
- "Current number of pv entry chunks allocated");
-SYSCTL_INT(_vm_pmap, OID_AUTO, pc_chunk_frees, CTLFLAG_RD, &pc_chunk_frees, 0,
- "Current number of pv entry chunks frees");
-SYSCTL_INT(_vm_pmap, OID_AUTO, pc_chunk_tryfail, CTLFLAG_RD, &pc_chunk_tryfail, 0,
- "Number of times tried to get a chunk page but failed.");
-
-static long pv_entry_frees, pv_entry_allocs;
-static int pv_entry_spare;
-
-SYSCTL_LONG(_vm_pmap, OID_AUTO, pv_entry_frees, CTLFLAG_RD, &pv_entry_frees, 0,
- "Current number of pv entry frees");
-SYSCTL_LONG(_vm_pmap, OID_AUTO, pv_entry_allocs, CTLFLAG_RD, &pv_entry_allocs, 0,
- "Current number of pv entry allocs");
-SYSCTL_INT(_vm_pmap, OID_AUTO, pv_entry_spare, CTLFLAG_RD, &pv_entry_spare, 0,
- "Current number of spare pv entries");
-#endif
-
-uma_zone_t l2zone;
-static uma_zone_t l2table_zone;
-static vm_offset_t pmap_kernel_l2dtable_kva;
-static vm_offset_t pmap_kernel_l2ptp_kva;
-static vm_paddr_t pmap_kernel_l2ptp_phys;
-static struct rwlock pvh_global_lock;
-
-int l1_mem_types[] = {
- ARM_L1S_STRONG_ORD,
- ARM_L1S_DEVICE_NOSHARE,
- ARM_L1S_DEVICE_SHARE,
- ARM_L1S_NRML_NOCACHE,
- ARM_L1S_NRML_IWT_OWT,
- ARM_L1S_NRML_IWB_OWB,
- ARM_L1S_NRML_IWBA_OWBA
-};
-
-int l2l_mem_types[] = {
- ARM_L2L_STRONG_ORD,
- ARM_L2L_DEVICE_NOSHARE,
- ARM_L2L_DEVICE_SHARE,
- ARM_L2L_NRML_NOCACHE,
- ARM_L2L_NRML_IWT_OWT,
- ARM_L2L_NRML_IWB_OWB,
- ARM_L2L_NRML_IWBA_OWBA
-};
-
-int l2s_mem_types[] = {
- ARM_L2S_STRONG_ORD,
- ARM_L2S_DEVICE_NOSHARE,
- ARM_L2S_DEVICE_SHARE,
- ARM_L2S_NRML_NOCACHE,
- ARM_L2S_NRML_IWT_OWT,
- ARM_L2S_NRML_IWB_OWB,
- ARM_L2S_NRML_IWBA_OWBA
-};
-
-/*
- * This list exists for the benefit of pmap_map_chunk(). It keeps track
- * of the kernel L2 tables during bootstrap, so that pmap_map_chunk() can
- * find them as necessary.
- *
- * Note that the data on this list MUST remain valid after initarm() returns,
- * as pmap_bootstrap() uses it to contruct L2 table metadata.
- */
-SLIST_HEAD(, pv_addr) kernel_pt_list = SLIST_HEAD_INITIALIZER(kernel_pt_list);
-
-static void
-pmap_init_l1(struct l1_ttable *l1, pd_entry_t *l1pt)
-{
- int i;
-
- l1->l1_kva = l1pt;
- l1->l1_domain_use_count = 0;
- l1->l1_domain_first = 0;
-
- for (i = 0; i < PMAP_DOMAINS; i++)
- l1->l1_domain_free[i] = i + 1;
-
- /*
- * Copy the kernel's L1 entries to each new L1.
- */
- if (l1pt != pmap_kernel()->pm_l1->l1_kva)
- memcpy(l1pt, pmap_kernel()->pm_l1->l1_kva, L1_TABLE_SIZE);
-
- if ((l1->l1_physaddr = pmap_extract(pmap_kernel(), (vm_offset_t)l1pt)) == 0)
- panic("pmap_init_l1: can't get PA of L1 at %p", l1pt);
- SLIST_INSERT_HEAD(&l1_list, l1, l1_link);
- TAILQ_INSERT_TAIL(&l1_lru_list, l1, l1_lru);
-}
-
-static vm_offset_t
-kernel_pt_lookup(vm_paddr_t pa)
-{
- struct pv_addr *pv;
-
- SLIST_FOREACH(pv, &kernel_pt_list, pv_list) {
- if (pv->pv_pa == pa)
- return (pv->pv_va);
- }
- return (0);
-}
-
-void
-pmap_pte_init_mmu_v6(void)
-{
-
- if (PTE_PAGETABLE >= 3)
- pmap_needs_pte_sync = 1;
- pte_l1_s_cache_mode = l1_mem_types[PTE_CACHE];
- pte_l2_l_cache_mode = l2l_mem_types[PTE_CACHE];
- pte_l2_s_cache_mode = l2s_mem_types[PTE_CACHE];
-
- pte_l1_s_cache_mode_pt = l1_mem_types[PTE_PAGETABLE];
- pte_l2_l_cache_mode_pt = l2l_mem_types[PTE_PAGETABLE];
- pte_l2_s_cache_mode_pt = l2s_mem_types[PTE_PAGETABLE];
-
-}
-
-/*
- * Allocate an L1 translation table for the specified pmap.
- * This is called at pmap creation time.
- */
-static void
-pmap_alloc_l1(pmap_t pmap)
-{
- struct l1_ttable *l1;
- u_int8_t domain;
-
- /*
- * Remove the L1 at the head of the LRU list
- */
- mtx_lock(&l1_lru_lock);
- l1 = TAILQ_FIRST(&l1_lru_list);
- TAILQ_REMOVE(&l1_lru_list, l1, l1_lru);
-
- /*
- * Pick the first available domain number, and update
- * the link to the next number.
- */
- domain = l1->l1_domain_first;
- l1->l1_domain_first = l1->l1_domain_free[domain];
-
- /*
- * If there are still free domain numbers in this L1,
- * put it back on the TAIL of the LRU list.
- */
- if (++l1->l1_domain_use_count < PMAP_DOMAINS)
- TAILQ_INSERT_TAIL(&l1_lru_list, l1, l1_lru);
-
- mtx_unlock(&l1_lru_lock);
-
- /*
- * Fix up the relevant bits in the pmap structure
- */
- pmap->pm_l1 = l1;
- pmap->pm_domain = domain + 1;
-}
-
-/*
- * Free an L1 translation table.
- * This is called at pmap destruction time.
- */
-static void
-pmap_free_l1(pmap_t pmap)
-{
- struct l1_ttable *l1 = pmap->pm_l1;
-
- mtx_lock(&l1_lru_lock);
-
- /*
- * If this L1 is currently on the LRU list, remove it.
- */
- if (l1->l1_domain_use_count < PMAP_DOMAINS)
- TAILQ_REMOVE(&l1_lru_list, l1, l1_lru);
-
- /*
- * Free up the domain number which was allocated to the pmap
- */
- l1->l1_domain_free[pmap->pm_domain - 1] = l1->l1_domain_first;
- l1->l1_domain_first = pmap->pm_domain - 1;
- l1->l1_domain_use_count--;
-
- /*
- * The L1 now must have at least 1 free domain, so add
- * it back to the LRU list. If the use count is zero,
- * put it at the head of the list, otherwise it goes
- * to the tail.
- */
- if (l1->l1_domain_use_count == 0) {
- TAILQ_INSERT_HEAD(&l1_lru_list, l1, l1_lru);
- } else
- TAILQ_INSERT_TAIL(&l1_lru_list, l1, l1_lru);
-
- mtx_unlock(&l1_lru_lock);
-}
-
-/*
- * Returns a pointer to the L2 bucket associated with the specified pmap
- * and VA, or NULL if no L2 bucket exists for the address.
- */
-static PMAP_INLINE struct l2_bucket *
-pmap_get_l2_bucket(pmap_t pmap, vm_offset_t va)
-{
- struct l2_dtable *l2;
- struct l2_bucket *l2b;
- u_short l1idx;
-
- l1idx = L1_IDX(va);
-
- if ((l2 = pmap->pm_l2[L2_IDX(l1idx)]) == NULL ||
- (l2b = &l2->l2_bucket[L2_BUCKET(l1idx)])->l2b_kva == NULL)
- return (NULL);
-
- return (l2b);
-}
-
-/*
- * Returns a pointer to the L2 bucket associated with the specified pmap
- * and VA.
- *
- * If no L2 bucket exists, perform the necessary allocations to put an L2
- * bucket/page table in place.
- *
- * Note that if a new L2 bucket/page was allocated, the caller *must*
- * increment the bucket occupancy counter appropriately *before*
- * releasing the pmap's lock to ensure no other thread or cpu deallocates
- * the bucket/page in the meantime.
- */
-static struct l2_bucket *
-pmap_alloc_l2_bucket(pmap_t pmap, vm_offset_t va)
-{
- struct l2_dtable *l2;
- struct l2_bucket *l2b;
- u_short l1idx;
-
- l1idx = L1_IDX(va);
-
- PMAP_ASSERT_LOCKED(pmap);
- rw_assert(&pvh_global_lock, RA_WLOCKED);
- if ((l2 = pmap->pm_l2[L2_IDX(l1idx)]) == NULL) {
- /*
- * No mapping at this address, as there is
- * no entry in the L1 table.
- * Need to allocate a new l2_dtable.
- */
- PMAP_UNLOCK(pmap);
- rw_wunlock(&pvh_global_lock);
- if ((l2 = uma_zalloc(l2table_zone, M_NOWAIT)) == NULL) {
- rw_wlock(&pvh_global_lock);
- PMAP_LOCK(pmap);
- return (NULL);
- }
- rw_wlock(&pvh_global_lock);
- PMAP_LOCK(pmap);
- if (pmap->pm_l2[L2_IDX(l1idx)] != NULL) {
- /*
- * Someone already allocated the l2_dtable while
- * we were doing the same.
- */
- uma_zfree(l2table_zone, l2);
- l2 = pmap->pm_l2[L2_IDX(l1idx)];
- } else {
- bzero(l2, sizeof(*l2));
- /*
- * Link it into the parent pmap
- */
- pmap->pm_l2[L2_IDX(l1idx)] = l2;
- }
- }
-
- l2b = &l2->l2_bucket[L2_BUCKET(l1idx)];
-
- /*
- * Fetch pointer to the L2 page table associated with the address.
- */
- if (l2b->l2b_kva == NULL) {
- pt_entry_t *ptep;
-
- /*
- * No L2 page table has been allocated. Chances are, this
- * is because we just allocated the l2_dtable, above.
- */
- l2->l2_occupancy++;
- PMAP_UNLOCK(pmap);
- rw_wunlock(&pvh_global_lock);
- ptep = uma_zalloc(l2zone, M_NOWAIT);
- rw_wlock(&pvh_global_lock);
- PMAP_LOCK(pmap);
- if (l2b->l2b_kva != 0) {
- /* We lost the race. */
- l2->l2_occupancy--;
- uma_zfree(l2zone, ptep);
- return (l2b);
- }
- l2b->l2b_phys = vtophys(ptep);
- if (ptep == NULL) {
- /*
- * Oops, no more L2 page tables available at this
- * time. We may need to deallocate the l2_dtable
- * if we allocated a new one above.
- */
- l2->l2_occupancy--;
- if (l2->l2_occupancy == 0) {
- pmap->pm_l2[L2_IDX(l1idx)] = NULL;
- uma_zfree(l2table_zone, l2);
- }
- return (NULL);
- }
-
- l2b->l2b_kva = ptep;
- l2b->l2b_l1idx = l1idx;
- }
-
- return (l2b);
-}
-
-static PMAP_INLINE void
-pmap_free_l2_ptp(pt_entry_t *l2)
-{
- uma_zfree(l2zone, l2);
-}
-/*
- * One or more mappings in the specified L2 descriptor table have just been
- * invalidated.
- *
- * Garbage collect the metadata and descriptor table itself if necessary.
- *
- * The pmap lock must be acquired when this is called (not necessary
- * for the kernel pmap).
- */
-static void
-pmap_free_l2_bucket(pmap_t pmap, struct l2_bucket *l2b, u_int count)
-{
- struct l2_dtable *l2;
- pd_entry_t *pl1pd, l1pd;
- pt_entry_t *ptep;
- u_short l1idx;
-
-
- /*
- * Update the bucket's reference count according to how many
- * PTEs the caller has just invalidated.
- */
- l2b->l2b_occupancy -= count;
-
- /*
- * Note:
- *
- * Level 2 page tables allocated to the kernel pmap are never freed
- * as that would require checking all Level 1 page tables and
- * removing any references to the Level 2 page table. See also the
- * comment elsewhere about never freeing bootstrap L2 descriptors.
- *
- * We make do with just invalidating the mapping in the L2 table.
- *
- * This isn't really a big deal in practice and, in fact, leads
- * to a performance win over time as we don't need to continually
- * alloc/free.
- */
- if (l2b->l2b_occupancy > 0 || pmap == pmap_kernel())
- return;
-
- /*
- * There are no more valid mappings in this level 2 page table.
- * Go ahead and NULL-out the pointer in the bucket, then
- * free the page table.
- */
- l1idx = l2b->l2b_l1idx;
- ptep = l2b->l2b_kva;
- l2b->l2b_kva = NULL;
-
- pl1pd = &pmap->pm_l1->l1_kva[l1idx];
-
- /*
- * If the L1 slot matches the pmap's domain
- * number, then invalidate it.
- */
- l1pd = *pl1pd & (L1_TYPE_MASK | L1_C_DOM_MASK);
- if (l1pd == (L1_C_DOM(pmap->pm_domain) | L1_TYPE_C)) {
- *pl1pd = 0;
- PTE_SYNC(pl1pd);
- cpu_tlb_flushD_SE((vm_offset_t)ptep);
- cpu_cpwait();
- }
-
- /*
- * Release the L2 descriptor table back to the pool cache.
- */
- pmap_free_l2_ptp(ptep);
-
- /*
- * Update the reference count in the associated l2_dtable
- */
- l2 = pmap->pm_l2[L2_IDX(l1idx)];
- if (--l2->l2_occupancy > 0)
- return;
-
- /*
- * There are no more valid mappings in any of the Level 1
- * slots managed by this l2_dtable. Go ahead and NULL-out
- * the pointer in the parent pmap and free the l2_dtable.
- */
- pmap->pm_l2[L2_IDX(l1idx)] = NULL;
- uma_zfree(l2table_zone, l2);
-}
-
-/*
- * Pool cache constructors for L2 descriptor tables, metadata and pmap
- * structures.
- */
-static int
-pmap_l2ptp_ctor(void *mem, int size, void *arg, int flags)
-{
- struct l2_bucket *l2b;
- pt_entry_t *ptep, pte;
- vm_offset_t va = (vm_offset_t)mem & ~PAGE_MASK;
-
- /*
- * The mappings for these page tables were initially made using
- * pmap_kenter() by the pool subsystem. Therefore, the cache-
- * mode will not be right for page table mappings. To avoid
- * polluting the pmap_kenter() code with a special case for
- * page tables, we simply fix up the cache-mode here if it's not
- * correct.
- */
- l2b = pmap_get_l2_bucket(pmap_kernel(), va);
- ptep = &l2b->l2b_kva[l2pte_index(va)];
- pte = *ptep;
-
- cpu_idcache_wbinv_range(va, PAGE_SIZE);
- pmap_l2cache_wbinv_range(va, pte & L2_S_FRAME, PAGE_SIZE);
- if ((pte & L2_S_CACHE_MASK) != pte_l2_s_cache_mode_pt) {
- /*
- * Page tables must have the cache-mode set to
- * Write-Thru.
- */
- *ptep = (pte & ~L2_S_CACHE_MASK) | pte_l2_s_cache_mode_pt;
- PTE_SYNC(ptep);
- cpu_tlb_flushD_SE(va);
- cpu_cpwait();
- }
-
- memset(mem, 0, L2_TABLE_SIZE_REAL);
- return (0);
-}
-
-/*
- * Modify pte bits for all ptes corresponding to the given physical address.
- * We use `maskbits' rather than `clearbits' because we're always passing
- * constants and the latter would require an extra inversion at run-time.
- */
-static int
-pmap_clearbit(struct vm_page *m, u_int maskbits)
-{
- struct l2_bucket *l2b;
- struct pv_entry *pv, *pve, *next_pv;
- struct md_page *pvh;
- pd_entry_t *pl1pd;
- pt_entry_t *ptep, npte, opte;
- pmap_t pmap;
- vm_offset_t va;
- u_int oflags;
- int count = 0;
-
- rw_wlock(&pvh_global_lock);
- if ((m->flags & PG_FICTITIOUS) != 0)
- goto small_mappings;
-
- pvh = pa_to_pvh(VM_PAGE_TO_PHYS(m));
- TAILQ_FOREACH_SAFE(pv, &pvh->pv_list, pv_list, next_pv) {
- va = pv->pv_va;
- pmap = PV_PMAP(pv);
- PMAP_LOCK(pmap);
- pl1pd = &pmap->pm_l1->l1_kva[L1_IDX(va)];
- KASSERT((*pl1pd & L1_TYPE_MASK) == L1_S_PROTO,
- ("pmap_clearbit: valid section mapping expected"));
- if ((maskbits & PVF_WRITE) && (pv->pv_flags & PVF_WRITE))
- (void)pmap_demote_section(pmap, va);
- else if ((maskbits & PVF_REF) && L1_S_REFERENCED(*pl1pd)) {
- if (pmap_demote_section(pmap, va)) {
- if ((pv->pv_flags & PVF_WIRED) == 0) {
- /*
- * Remove the mapping to a single page
- * so that a subsequent access may
- * repromote. Since the underlying
- * l2_bucket is fully populated, this
- * removal never frees an entire
- * l2_bucket.
- */
- va += (VM_PAGE_TO_PHYS(m) &
- L1_S_OFFSET);
- l2b = pmap_get_l2_bucket(pmap, va);
- KASSERT(l2b != NULL,
- ("pmap_clearbit: no l2 bucket for "
- "va 0x%#x, pmap 0x%p", va, pmap));
- ptep = &l2b->l2b_kva[l2pte_index(va)];
- *ptep = 0;
- PTE_SYNC(ptep);
- pmap_free_l2_bucket(pmap, l2b, 1);
- pve = pmap_remove_pv(m, pmap, va);
- KASSERT(pve != NULL, ("pmap_clearbit: "
- "no PV entry for managed mapping"));
- pmap_free_pv_entry(pmap, pve);
-
- }
- }
- } else if ((maskbits & PVF_MOD) && L1_S_WRITABLE(*pl1pd)) {
- if (pmap_demote_section(pmap, va)) {
- if ((pv->pv_flags & PVF_WIRED) == 0) {
- /*
- * Write protect the mapping to a
- * single page so that a subsequent
- * write access may repromote.
- */
- va += (VM_PAGE_TO_PHYS(m) &
- L1_S_OFFSET);
- l2b = pmap_get_l2_bucket(pmap, va);
- KASSERT(l2b != NULL,
- ("pmap_clearbit: no l2 bucket for "
- "va 0x%#x, pmap 0x%p", va, pmap));
- ptep = &l2b->l2b_kva[l2pte_index(va)];
- if ((*ptep & L2_S_PROTO) != 0) {
- pve = pmap_find_pv(&m->md,
- pmap, va);
- KASSERT(pve != NULL,
- ("pmap_clearbit: no PV "
- "entry for managed mapping"));
- pve->pv_flags &= ~PVF_WRITE;
- *ptep |= L2_APX;
- PTE_SYNC(ptep);
- }
- }
- }
- }
- PMAP_UNLOCK(pmap);
- }
-
-small_mappings:
- if (TAILQ_EMPTY(&m->md.pv_list)) {
- rw_wunlock(&pvh_global_lock);
- return (0);
- }
-
- /*
- * Loop over all current mappings setting/clearing as appropos
- */
- TAILQ_FOREACH(pv, &m->md.pv_list, pv_list) {
- va = pv->pv_va;
- pmap = PV_PMAP(pv);
- oflags = pv->pv_flags;
- pv->pv_flags &= ~maskbits;
-
- PMAP_LOCK(pmap);
-
- l2b = pmap_get_l2_bucket(pmap, va);
- KASSERT(l2b != NULL, ("pmap_clearbit: no l2 bucket for "
- "va 0x%#x, pmap 0x%p", va, pmap));
-
- ptep = &l2b->l2b_kva[l2pte_index(va)];
- npte = opte = *ptep;
-
- if (maskbits & (PVF_WRITE | PVF_MOD)) {
- /* make the pte read only */
- npte |= L2_APX;
- }
-
- if (maskbits & PVF_REF) {
- /*
- * Clear referenced flag in PTE so that we
- * will take a flag fault the next time the mapping
- * is referenced.
- */
- npte &= ~L2_S_REF;
- }
-
- CTR4(KTR_PMAP,"clearbit: pmap:%p bits:%x pte:%x->%x",
- pmap, maskbits, opte, npte);
- if (npte != opte) {
- count++;
- *ptep = npte;
- PTE_SYNC(ptep);
- /* Flush the TLB entry if a current pmap. */
- if (PTE_BEEN_EXECD(opte))
- cpu_tlb_flushID_SE(pv->pv_va);
- else if (PTE_BEEN_REFD(opte))
- cpu_tlb_flushD_SE(pv->pv_va);
- cpu_cpwait();
- }
-
- PMAP_UNLOCK(pmap);
-
- }
-
- if (maskbits & PVF_WRITE)
- vm_page_aflag_clear(m, PGA_WRITEABLE);
- rw_wunlock(&pvh_global_lock);
- return (count);
-}
-
-/*
- * main pv_entry manipulation functions:
- * pmap_enter_pv: enter a mapping onto a vm_page list
- * pmap_remove_pv: remove a mappiing from a vm_page list
- *
- * NOTE: pmap_enter_pv expects to lock the pvh itself
- * pmap_remove_pv expects the caller to lock the pvh before calling
- */
-
-/*
- * pmap_enter_pv: enter a mapping onto a vm_page's PV list
- *
- * => caller should hold the proper lock on pvh_global_lock
- * => caller should have pmap locked
- * => we will (someday) gain the lock on the vm_page's PV list
- * => caller should adjust ptp's wire_count before calling
- * => caller should not adjust pmap's wire_count
- */
-static void
-pmap_enter_pv(struct vm_page *m, struct pv_entry *pve, pmap_t pmap,
- vm_offset_t va, u_int flags)
-{
-
- rw_assert(&pvh_global_lock, RA_WLOCKED);
-
- PMAP_ASSERT_LOCKED(pmap);
- pve->pv_va = va;
- pve->pv_flags = flags;
-
- TAILQ_INSERT_HEAD(&m->md.pv_list, pve, pv_list);
- if (pve->pv_flags & PVF_WIRED)
- ++pmap->pm_stats.wired_count;
-}
-
-/*
- *
- * pmap_find_pv: Find a pv entry
- *
- * => caller should hold lock on vm_page
- */
-static PMAP_INLINE struct pv_entry *
-pmap_find_pv(struct md_page *md, pmap_t pmap, vm_offset_t va)
-{
- struct pv_entry *pv;
-
- rw_assert(&pvh_global_lock, RA_WLOCKED);
- TAILQ_FOREACH(pv, &md->pv_list, pv_list)
- if (pmap == PV_PMAP(pv) && va == pv->pv_va)
- break;
-
- return (pv);
-}
-
-/*
- * vector_page_setprot:
- *
- * Manipulate the protection of the vector page.
- */
-void
-vector_page_setprot(int prot)
-{
- struct l2_bucket *l2b;
- pt_entry_t *ptep;
-
- l2b = pmap_get_l2_bucket(pmap_kernel(), vector_page);
-
- ptep = &l2b->l2b_kva[l2pte_index(vector_page)];
- /*
- * Set referenced flag.
- * Vectors' page is always desired
- * to be allowed to reside in TLB.
- */
- *ptep |= L2_S_REF;
-
- pmap_set_prot(ptep, prot|VM_PROT_EXECUTE, 0);
- PTE_SYNC(ptep);
- cpu_tlb_flushID_SE(vector_page);
- cpu_cpwait();
-}
-
-static void
-pmap_set_prot(pt_entry_t *ptep, vm_prot_t prot, uint8_t user)
-{
-
- *ptep &= ~(L2_S_PROT_MASK | L2_XN);
-
- if (!(prot & VM_PROT_EXECUTE))
- *ptep |= L2_XN;
-
- /* Set defaults first - kernel read access */
- *ptep |= L2_APX;
- *ptep |= L2_S_PROT_R;
- /* Now tune APs as desired */
- if (user)
- *ptep |= L2_S_PROT_U;
-
- if (prot & VM_PROT_WRITE)
- *ptep &= ~(L2_APX);
-}
-
-/*
- * pmap_remove_pv: try to remove a mapping from a pv_list
- *
- * => caller should hold proper lock on pmap_main_lock
- * => pmap should be locked
- * => caller should hold lock on vm_page [so that attrs can be adjusted]
- * => caller should adjust ptp's wire_count and free PTP if needed
- * => caller should NOT adjust pmap's wire_count
- * => we return the removed pve
- */
-static struct pv_entry *
-pmap_remove_pv(struct vm_page *m, pmap_t pmap, vm_offset_t va)
-{
- struct pv_entry *pve;
-
- rw_assert(&pvh_global_lock, RA_WLOCKED);
- PMAP_ASSERT_LOCKED(pmap);
-
- pve = pmap_find_pv(&m->md, pmap, va); /* find corresponding pve */
- if (pve != NULL) {
- TAILQ_REMOVE(&m->md.pv_list, pve, pv_list);
- if (pve->pv_flags & PVF_WIRED)
- --pmap->pm_stats.wired_count;
- }
- if (TAILQ_EMPTY(&m->md.pv_list))
- vm_page_aflag_clear(m, PGA_WRITEABLE);
-
- return(pve); /* return removed pve */
-}
-
-/*
- *
- * pmap_modify_pv: Update pv flags
- *
- * => caller should hold lock on vm_page [so that attrs can be adjusted]
- * => caller should NOT adjust pmap's wire_count
- * => we return the old flags
- *
- * Modify a physical-virtual mapping in the pv table
- */
-static u_int
-pmap_modify_pv(struct vm_page *m, pmap_t pmap, vm_offset_t va,
- u_int clr_mask, u_int set_mask)
-{
- struct pv_entry *npv;
- u_int flags, oflags;
-
- PMAP_ASSERT_LOCKED(pmap);
- rw_assert(&pvh_global_lock, RA_WLOCKED);
- if ((npv = pmap_find_pv(&m->md, pmap, va)) == NULL)
- return (0);
-
- /*
- * There is at least one VA mapping this page.
- */
- oflags = npv->pv_flags;
- npv->pv_flags = flags = (oflags & ~clr_mask) | set_mask;
-
- if ((flags ^ oflags) & PVF_WIRED) {
- if (flags & PVF_WIRED)
- ++pmap->pm_stats.wired_count;
- else
- --pmap->pm_stats.wired_count;
- }
-
- return (oflags);
-}
-
-/* Function to set the debug level of the pmap code */
-#ifdef PMAP_DEBUG
-void
-pmap_debug(int level)
-{
- pmap_debug_level = level;
- dprintf("pmap_debug: level=%d\n", pmap_debug_level);
-}
-#endif /* PMAP_DEBUG */
-
-void
-pmap_pinit0(struct pmap *pmap)
-{
- PDEBUG(1, printf("pmap_pinit0: pmap = %08x\n", (u_int32_t) pmap));
-
- bcopy(kernel_pmap, pmap, sizeof(*pmap));
- bzero(&pmap->pm_mtx, sizeof(pmap->pm_mtx));
- PMAP_LOCK_INIT(pmap);
- TAILQ_INIT(&pmap->pm_pvchunk);
-}
-
-/*
- * Initialize a vm_page's machine-dependent fields.
- */
-void
-pmap_page_init(vm_page_t m)
-{
-
- TAILQ_INIT(&m->md.pv_list);
- m->md.pv_memattr = VM_MEMATTR_DEFAULT;
-}
-
-static vm_offset_t
-pmap_ptelist_alloc(vm_offset_t *head)
-{
- pt_entry_t *pte;
- vm_offset_t va;
-
- va = *head;
- if (va == 0)
- return (va); /* Out of memory */
- pte = vtopte(va);
- *head = *pte;
- if ((*head & L2_TYPE_MASK) != L2_TYPE_INV)
- panic("%s: va is not L2_TYPE_INV!", __func__);
- *pte = 0;
- return (va);
-}
-
-static void
-pmap_ptelist_free(vm_offset_t *head, vm_offset_t va)
-{
- pt_entry_t *pte;
-
- if ((va & L2_TYPE_MASK) != L2_TYPE_INV)
- panic("%s: freeing va that is not L2_TYPE INV!", __func__);
- pte = vtopte(va);
- *pte = *head; /* virtual! L2_TYPE is L2_TYPE_INV though */
- *head = va;
-}
-
-static void
-pmap_ptelist_init(vm_offset_t *head, void *base, int npages)
-{
- int i;
- vm_offset_t va;
-
- *head = 0;
- for (i = npages - 1; i >= 0; i--) {
- va = (vm_offset_t)base + i * PAGE_SIZE;
- pmap_ptelist_free(head, va);
- }
-}
-
-/*
- * Initialize the pmap module.
- * Called by vm_init, to initialize any structures that the pmap
- * system needs to map virtual memory.
- */
-void
-pmap_init(void)
-{
- vm_size_t s;
- int i, pv_npg;
-
- l2zone = uma_zcreate("L2 Table", L2_TABLE_SIZE_REAL, pmap_l2ptp_ctor,
- NULL, NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_VM | UMA_ZONE_NOFREE);
- l2table_zone = uma_zcreate("L2 Table", sizeof(struct l2_dtable), NULL,
- NULL, NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_VM | UMA_ZONE_NOFREE);
-
- /*
- * Are large page mappings supported and enabled?
- */
- TUNABLE_INT_FETCH("vm.pmap.sp_enabled", &sp_enabled);
- if (sp_enabled) {
- KASSERT(MAXPAGESIZES > 1 && pagesizes[1] == 0,
- ("pmap_init: can't assign to pagesizes[1]"));
- pagesizes[1] = NBPDR;
- }
-
- /*
- * Calculate the size of the pv head table for superpages.
- * Handle the possibility that "vm_phys_segs[...].end" is zero.
- */
- pv_npg = trunc_1mpage(vm_phys_segs[vm_phys_nsegs - 1].end -
- PAGE_SIZE) / NBPDR + 1;
-
- /*
- * Allocate memory for the pv head table for superpages.
- */
- s = (vm_size_t)(pv_npg * sizeof(struct md_page));
- s = round_page(s);
- pv_table = (struct md_page *)kmem_malloc(kernel_arena, s,
- M_WAITOK | M_ZERO);
- for (i = 0; i < pv_npg; i++)
- TAILQ_INIT(&pv_table[i].pv_list);
-
- /*
- * Initialize the address space for the pv chunks.
- */
-
- TUNABLE_INT_FETCH("vm.pmap.shpgperproc", &shpgperproc);
- pv_entry_max = shpgperproc * maxproc + vm_cnt.v_page_count;
- TUNABLE_INT_FETCH("vm.pmap.pv_entries", &pv_entry_max);
- pv_entry_max = roundup(pv_entry_max, _NPCPV);
- pv_entry_high_water = 9 * (pv_entry_max / 10);
-
- pv_maxchunks = MAX(pv_entry_max / _NPCPV, maxproc);
- pv_chunkbase = (struct pv_chunk *)kva_alloc(PAGE_SIZE * pv_maxchunks);
-
- if (pv_chunkbase == NULL)
- panic("pmap_init: not enough kvm for pv chunks");
-
- pmap_ptelist_init(&pv_vafree, pv_chunkbase, pv_maxchunks);
-
- /*
- * Now it is safe to enable pv_table recording.
- */
- PDEBUG(1, printf("pmap_init: done!\n"));
-}
-
-SYSCTL_INT(_vm_pmap, OID_AUTO, pv_entry_max, CTLFLAG_RD, &pv_entry_max, 0,
- "Max number of PV entries");
-SYSCTL_INT(_vm_pmap, OID_AUTO, shpgperproc, CTLFLAG_RD, &shpgperproc, 0,
- "Page share factor per proc");
-
-static SYSCTL_NODE(_vm_pmap, OID_AUTO, section, CTLFLAG_RD, 0,
- "1MB page mapping counters");
-
-static u_long pmap_section_demotions;
-SYSCTL_ULONG(_vm_pmap_section, OID_AUTO, demotions, CTLFLAG_RD,
- &pmap_section_demotions, 0, "1MB page demotions");
-
-static u_long pmap_section_mappings;
-SYSCTL_ULONG(_vm_pmap_section, OID_AUTO, mappings, CTLFLAG_RD,
- &pmap_section_mappings, 0, "1MB page mappings");
-
-static u_long pmap_section_p_failures;
-SYSCTL_ULONG(_vm_pmap_section, OID_AUTO, p_failures, CTLFLAG_RD,
- &pmap_section_p_failures, 0, "1MB page promotion failures");
-
-static u_long pmap_section_promotions;
-SYSCTL_ULONG(_vm_pmap_section, OID_AUTO, promotions, CTLFLAG_RD,
- &pmap_section_promotions, 0, "1MB page promotions");
-
-int
-pmap_fault_fixup(pmap_t pmap, vm_offset_t va, vm_prot_t ftype, int user)
-{
- struct l2_dtable *l2;
- struct l2_bucket *l2b;
- pd_entry_t *pl1pd, l1pd;
- pt_entry_t *ptep, pte;
- vm_paddr_t pa;
- u_int l1idx;
- int rv = 0;
-
- l1idx = L1_IDX(va);
- rw_wlock(&pvh_global_lock);
- PMAP_LOCK(pmap);
- /*
- * Check and possibly fix-up L1 section mapping
- * only when superpage mappings are enabled to speed up.
- */
- if (sp_enabled) {
- pl1pd = &pmap->pm_l1->l1_kva[l1idx];
- l1pd = *pl1pd;
- if ((l1pd & L1_TYPE_MASK) == L1_S_PROTO) {
- /* Catch an access to the vectors section */
- if (l1idx == L1_IDX(vector_page))
- goto out;
- /*
- * Stay away from the kernel mappings.
- * None of them should fault from L1 entry.
- */
- if (pmap == pmap_kernel())
- goto out;
- /*
- * Catch a forbidden userland access
- */
- if (user && !(l1pd & L1_S_PROT_U))
- goto out;
- /*
- * Superpage is always either mapped read only
- * or it is modified and permitted to be written
- * by default. Therefore, process only reference
- * flag fault and demote page in case of write fault.
- */
- if ((ftype & VM_PROT_WRITE) && !L1_S_WRITABLE(l1pd) &&
- L1_S_REFERENCED(l1pd)) {
- (void)pmap_demote_section(pmap, va);
- goto out;
- } else if (!L1_S_REFERENCED(l1pd)) {
- /* Mark the page "referenced" */
- *pl1pd = l1pd | L1_S_REF;
- PTE_SYNC(pl1pd);
- goto l1_section_out;
- } else
- goto out;
- }
- }
- /*
- * If there is no l2_dtable for this address, then the process
- * has no business accessing it.
- *
- * Note: This will catch userland processes trying to access
- * kernel addresses.
- */
- l2 = pmap->pm_l2[L2_IDX(l1idx)];
- if (l2 == NULL)
- goto out;
-
- /*
- * Likewise if there is no L2 descriptor table
- */
- l2b = &l2->l2_bucket[L2_BUCKET(l1idx)];
- if (l2b->l2b_kva == NULL)
- goto out;
-
- /*
- * Check the PTE itself.
- */
- ptep = &l2b->l2b_kva[l2pte_index(va)];
- pte = *ptep;
- if (pte == 0)
- goto out;
-
- /*
- * Catch a userland access to the vector page mapped at 0x0
- */
- if (user && !(pte & L2_S_PROT_U))
- goto out;
- if (va == vector_page)
- goto out;
-
- pa = l2pte_pa(pte);
- CTR5(KTR_PMAP, "pmap_fault_fix: pmap:%p va:%x pte:0x%x ftype:%x user:%x",
- pmap, va, pte, ftype, user);
- if ((ftype & VM_PROT_WRITE) && !(L2_S_WRITABLE(pte)) &&
- L2_S_REFERENCED(pte)) {
- /*
- * This looks like a good candidate for "page modified"
- * emulation...
- */
- struct pv_entry *pv;
- struct vm_page *m;
-
- /* Extract the physical address of the page */
- if ((m = PHYS_TO_VM_PAGE(pa)) == NULL) {
- goto out;
- }
- /* Get the current flags for this page. */
-
- pv = pmap_find_pv(&m->md, pmap, va);
- if (pv == NULL) {
- goto out;
- }
-
- /*
- * Do the flags say this page is writable? If not then it
- * is a genuine write fault. If yes then the write fault is
- * our fault as we did not reflect the write access in the
- * PTE. Now we know a write has occurred we can correct this
- * and also set the modified bit
- */
- if ((pv->pv_flags & PVF_WRITE) == 0) {
- goto out;
- }
-
- vm_page_dirty(m);
-
- /* Re-enable write permissions for the page */
- *ptep = (pte & ~L2_APX);
- PTE_SYNC(ptep);
- rv = 1;
- CTR1(KTR_PMAP, "pmap_fault_fix: new pte:0x%x", *ptep);
- } else if (!L2_S_REFERENCED(pte)) {
- /*
- * This looks like a good candidate for "page referenced"
- * emulation.
- */
- struct pv_entry *pv;
- struct vm_page *m;
-
- /* Extract the physical address of the page */
- if ((m = PHYS_TO_VM_PAGE(pa)) == NULL)
- goto out;
- /* Get the current flags for this page. */
- pv = pmap_find_pv(&m->md, pmap, va);
- if (pv == NULL)
- goto out;
-
- vm_page_aflag_set(m, PGA_REFERENCED);
-
- /* Mark the page "referenced" */
- *ptep = pte | L2_S_REF;
- PTE_SYNC(ptep);
- rv = 1;
- CTR1(KTR_PMAP, "pmap_fault_fix: new pte:0x%x", *ptep);
- }
-
- /*
- * We know there is a valid mapping here, so simply
- * fix up the L1 if necessary.
- */
- pl1pd = &pmap->pm_l1->l1_kva[l1idx];
- l1pd = l2b->l2b_phys | L1_C_DOM(pmap->pm_domain) | L1_C_PROTO;
- if (*pl1pd != l1pd) {
- *pl1pd = l1pd;
- PTE_SYNC(pl1pd);
- rv = 1;
- }
-
-#ifdef DEBUG
- /*
- * If 'rv == 0' at this point, it generally indicates that there is a
- * stale TLB entry for the faulting address. This happens when two or
- * more processes are sharing an L1. Since we don't flush the TLB on
- * a context switch between such processes, we can take domain faults
- * for mappings which exist at the same VA in both processes. EVEN IF
- * WE'VE RECENTLY FIXED UP THE CORRESPONDING L1 in pmap_enter(), for
- * example.
- *
- * This is extremely likely to happen if pmap_enter() updated the L1
- * entry for a recently entered mapping. In this case, the TLB is
- * flushed for the new mapping, but there may still be TLB entries for
- * other mappings belonging to other processes in the 1MB range
- * covered by the L1 entry.
- *
- * Since 'rv == 0', we know that the L1 already contains the correct
- * value, so the fault must be due to a stale TLB entry.
- *
- * Since we always need to flush the TLB anyway in the case where we
- * fixed up the L1, or frobbed the L2 PTE, we effectively deal with
- * stale TLB entries dynamically.
- *
- * However, the above condition can ONLY happen if the current L1 is
- * being shared. If it happens when the L1 is unshared, it indicates
- * that other parts of the pmap are not doing their job WRT managing
- * the TLB.
- */
- if (rv == 0 && pmap->pm_l1->l1_domain_use_count == 1) {
- printf("fixup: pmap %p, va 0x%08x, ftype %d - nothing to do!\n",
- pmap, va, ftype);
- printf("fixup: l2 %p, l2b %p, ptep %p, pl1pd %p\n",
- l2, l2b, ptep, pl1pd);
- printf("fixup: pte 0x%x, l1pd 0x%x, last code 0x%x\n",
- pte, l1pd, last_fault_code);
-#ifdef DDB
- Debugger();
-#endif
- }
-#endif
-
-l1_section_out:
- cpu_tlb_flushID_SE(va);
- cpu_cpwait();
-
- rv = 1;
-
-out:
- rw_wunlock(&pvh_global_lock);
- PMAP_UNLOCK(pmap);
- return (rv);
-}
-
-void
-pmap_postinit(void)
-{
- struct l2_bucket *l2b;
- struct l1_ttable *l1;
- pd_entry_t *pl1pt;
- pt_entry_t *ptep, pte;
- vm_offset_t va, eva;
- u_int loop, needed;
-
- needed = (maxproc / PMAP_DOMAINS) + ((maxproc % PMAP_DOMAINS) ? 1 : 0);
- needed -= 1;
- l1 = malloc(sizeof(*l1) * needed, M_VMPMAP, M_WAITOK);
-
- for (loop = 0; loop < needed; loop++, l1++) {
- /* Allocate a L1 page table */
- va = (vm_offset_t)contigmalloc(L1_TABLE_SIZE, M_VMPMAP, 0, 0x0,
- 0xffffffff, L1_TABLE_SIZE, 0);
-
- if (va == 0)
- panic("Cannot allocate L1 KVM");
-
- eva = va + L1_TABLE_SIZE;
- pl1pt = (pd_entry_t *)va;
-
- while (va < eva) {
- l2b = pmap_get_l2_bucket(pmap_kernel(), va);
- ptep = &l2b->l2b_kva[l2pte_index(va)];
- pte = *ptep;
- pte = (pte & ~L2_S_CACHE_MASK) | pte_l2_s_cache_mode_pt;
- *ptep = pte;
- PTE_SYNC(ptep);
- cpu_tlb_flushID_SE(va);
- cpu_cpwait();
- va += PAGE_SIZE;
- }
- pmap_init_l1(l1, pl1pt);
- }
-#ifdef DEBUG
- printf("pmap_postinit: Allocated %d static L1 descriptor tables\n",
- needed);
-#endif
-}
-
-/*
- * This is used to stuff certain critical values into the PCB where they
- * can be accessed quickly from cpu_switch() et al.
- */
-void
-pmap_set_pcb_pagedir(pmap_t pmap, struct pcb *pcb)
-{
- struct l2_bucket *l2b;
-
- pcb->pcb_pagedir = pmap->pm_l1->l1_physaddr;
- pcb->pcb_dacr = (DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL * 2)) |
- (DOMAIN_CLIENT << (pmap->pm_domain * 2));
-
- if (vector_page < KERNBASE) {
- pcb->pcb_pl1vec = &pmap->pm_l1->l1_kva[L1_IDX(vector_page)];
- l2b = pmap_get_l2_bucket(pmap, vector_page);
- pcb->pcb_l1vec = l2b->l2b_phys | L1_C_PROTO |
- L1_C_DOM(pmap->pm_domain) | L1_C_DOM(PMAP_DOMAIN_KERNEL);
- } else
- pcb->pcb_pl1vec = NULL;
-}
-
-void
-pmap_activate(struct thread *td)
-{
- pmap_t pmap;
- struct pcb *pcb;
-
- pmap = vmspace_pmap(td->td_proc->p_vmspace);
- pcb = td->td_pcb;
-
- critical_enter();
- pmap_set_pcb_pagedir(pmap, pcb);
-
- if (td == curthread) {
- u_int cur_dacr, cur_ttb;
-
- __asm __volatile("mrc p15, 0, %0, c2, c0, 0" : "=r"(cur_ttb));
- __asm __volatile("mrc p15, 0, %0, c3, c0, 0" : "=r"(cur_dacr));
-
- cur_ttb &= ~(L1_TABLE_SIZE - 1);
-
- if (cur_ttb == (u_int)pcb->pcb_pagedir &&
- cur_dacr == pcb->pcb_dacr) {
- /*
- * No need to switch address spaces.
- */
- critical_exit();
- return;
- }
-
-
- /*
- * We MUST, I repeat, MUST fix up the L1 entry corresponding
- * to 'vector_page' in the incoming L1 table before switching
- * to it otherwise subsequent interrupts/exceptions (including
- * domain faults!) will jump into hyperspace.
- */
- if (pcb->pcb_pl1vec) {
- *pcb->pcb_pl1vec = pcb->pcb_l1vec;
- }
-
- cpu_domains(pcb->pcb_dacr);
- cpu_setttb(pcb->pcb_pagedir);
- }
- critical_exit();
-}
-
-static int
-pmap_set_pt_cache_mode(pd_entry_t *kl1, vm_offset_t va)
-{
- pd_entry_t *pdep, pde;
- pt_entry_t *ptep, pte;
- vm_offset_t pa;
- int rv = 0;
-
- /*
- * Make sure the descriptor itself has the correct cache mode
- */
- pdep = &kl1[L1_IDX(va)];
- pde = *pdep;
-
- if (l1pte_section_p(pde)) {
- if ((pde & L1_S_CACHE_MASK) != pte_l1_s_cache_mode_pt) {
- *pdep = (pde & ~L1_S_CACHE_MASK) |
- pte_l1_s_cache_mode_pt;
- PTE_SYNC(pdep);
- rv = 1;
- }
- } else {
- pa = (vm_paddr_t)(pde & L1_C_ADDR_MASK);
- ptep = (pt_entry_t *)kernel_pt_lookup(pa);
- if (ptep == NULL)
- panic("pmap_bootstrap: No L2 for L2 @ va %p\n", ptep);
-
- ptep = &ptep[l2pte_index(va)];
- pte = *ptep;
- if ((pte & L2_S_CACHE_MASK) != pte_l2_s_cache_mode_pt) {
- *ptep = (pte & ~L2_S_CACHE_MASK) |
- pte_l2_s_cache_mode_pt;
- PTE_SYNC(ptep);
- rv = 1;
- }
- }
-
- return (rv);
-}
-
-static void
-pmap_alloc_specials(vm_offset_t *availp, int pages, vm_offset_t *vap,
- pt_entry_t **ptep)
-{
- vm_offset_t va = *availp;
- struct l2_bucket *l2b;
-
- if (ptep) {
- l2b = pmap_get_l2_bucket(pmap_kernel(), va);
- if (l2b == NULL)
- panic("pmap_alloc_specials: no l2b for 0x%x", va);
-
- *ptep = &l2b->l2b_kva[l2pte_index(va)];
- }
-
- *vap = va;
- *availp = va + (PAGE_SIZE * pages);
-}
-
-/*
- * Bootstrap the system enough to run with virtual memory.
- *
- * On the arm this is called after mapping has already been enabled
- * and just syncs the pmap module with what has already been done.
- * [We can't call it easily with mapping off since the kernel is not
- * mapped with PA == VA, hence we would have to relocate every address
- * from the linked base (virtual) address "KERNBASE" to the actual
- * (physical) address starting relative to 0]
- */
-#define PMAP_STATIC_L2_SIZE 16
-
-void
-pmap_bootstrap(vm_offset_t firstaddr, struct pv_addr *l1pt)
-{
- static struct l1_ttable static_l1;
- static struct l2_dtable static_l2[PMAP_STATIC_L2_SIZE];
- struct l1_ttable *l1 = &static_l1;
- struct l2_dtable *l2;
- struct l2_bucket *l2b;
- struct czpages *czp;
- pd_entry_t pde;
- pd_entry_t *kernel_l1pt = (pd_entry_t *)l1pt->pv_va;
- pt_entry_t *ptep;
- vm_paddr_t pa;
- vm_offset_t va;
- vm_size_t size;
- int i, l1idx, l2idx, l2next = 0;
-
- PDEBUG(1, printf("firstaddr = %08x, lastaddr = %08x\n",
- firstaddr, vm_max_kernel_address));
-
- virtual_avail = firstaddr;
- kernel_pmap->pm_l1 = l1;
- kernel_l1pa = l1pt->pv_pa;
-
- /*
- * Scan the L1 translation table created by initarm() and create
- * the required metadata for all valid mappings found in it.
- */
- for (l1idx = 0; l1idx < (L1_TABLE_SIZE / sizeof(pd_entry_t)); l1idx++) {
- pde = kernel_l1pt[l1idx];
-
- /*
- * We're only interested in Coarse mappings.
- * pmap_extract() can deal with section mappings without
- * recourse to checking L2 metadata.
- */
- if ((pde & L1_TYPE_MASK) != L1_TYPE_C)
- continue;
-
- /*
- * Lookup the KVA of this L2 descriptor table
- */
- pa = (vm_paddr_t)(pde & L1_C_ADDR_MASK);
- ptep = (pt_entry_t *)kernel_pt_lookup(pa);
-
- if (ptep == NULL) {
- panic("pmap_bootstrap: No L2 for va 0x%x, pa 0x%lx",
- (u_int)l1idx << L1_S_SHIFT, (long unsigned int)pa);
- }
-
- /*
- * Fetch the associated L2 metadata structure.
- * Allocate a new one if necessary.
- */
- if ((l2 = kernel_pmap->pm_l2[L2_IDX(l1idx)]) == NULL) {
- if (l2next == PMAP_STATIC_L2_SIZE)
- panic("pmap_bootstrap: out of static L2s");
- kernel_pmap->pm_l2[L2_IDX(l1idx)] = l2 =
- &static_l2[l2next++];
- }
-
- /*
- * One more L1 slot tracked...
- */
- l2->l2_occupancy++;
-
- /*
- * Fill in the details of the L2 descriptor in the
- * appropriate bucket.
- */
- l2b = &l2->l2_bucket[L2_BUCKET(l1idx)];
- l2b->l2b_kva = ptep;
- l2b->l2b_phys = pa;
- l2b->l2b_l1idx = l1idx;
-
- /*
- * Establish an initial occupancy count for this descriptor
- */
- for (l2idx = 0;
- l2idx < (L2_TABLE_SIZE_REAL / sizeof(pt_entry_t));
- l2idx++) {
- if ((ptep[l2idx] & L2_TYPE_MASK) != L2_TYPE_INV) {
- l2b->l2b_occupancy++;
- }
- }
-
- /*
- * Make sure the descriptor itself has the correct cache mode.
- * If not, fix it, but whine about the problem. Port-meisters
- * should consider this a clue to fix up their initarm()
- * function. :)
- */
- if (pmap_set_pt_cache_mode(kernel_l1pt, (vm_offset_t)ptep)) {
- printf("pmap_bootstrap: WARNING! wrong cache mode for "
- "L2 pte @ %p\n", ptep);
- }
- }
-
-
- /*
- * Ensure the primary (kernel) L1 has the correct cache mode for
- * a page table. Bitch if it is not correctly set.
- */
- for (va = (vm_offset_t)kernel_l1pt;
- va < ((vm_offset_t)kernel_l1pt + L1_TABLE_SIZE); va += PAGE_SIZE) {
- if (pmap_set_pt_cache_mode(kernel_l1pt, va))
- printf("pmap_bootstrap: WARNING! wrong cache mode for "
- "primary L1 @ 0x%x\n", va);
- }
-
- cpu_dcache_wbinv_all();
- cpu_l2cache_wbinv_all();
- cpu_tlb_flushID();
- cpu_cpwait();
-
- PMAP_LOCK_INIT(kernel_pmap);
- CPU_FILL(&kernel_pmap->pm_active);
- kernel_pmap->pm_domain = PMAP_DOMAIN_KERNEL;
- TAILQ_INIT(&kernel_pmap->pm_pvchunk);
-
- /*
- * Initialize the global pv list lock.
- */
- rw_init(&pvh_global_lock, "pmap pv global");
-
- /*
- * Reserve some special page table entries/VA space for temporary
- * mapping of pages that are being copied or zeroed.
- */
- for (czp = cpu_czpages, i = 0; i < MAXCPU; ++i, ++czp) {
- mtx_init(&czp->lock, "czpages", NULL, MTX_DEF);
- pmap_alloc_specials(&virtual_avail, 1, &czp->srcva, &czp->srcptep);
- pmap_set_pt_cache_mode(kernel_l1pt, (vm_offset_t)czp->srcptep);
- pmap_alloc_specials(&virtual_avail, 1, &czp->dstva, &czp->dstptep);
- pmap_set_pt_cache_mode(kernel_l1pt, (vm_offset_t)czp->dstptep);
- }
-
- size = ((vm_max_kernel_address - pmap_curmaxkvaddr) + L1_S_OFFSET) /
- L1_S_SIZE;
- pmap_alloc_specials(&virtual_avail,
- round_page(size * L2_TABLE_SIZE_REAL) / PAGE_SIZE,
- &pmap_kernel_l2ptp_kva, NULL);
-
- size = (size + (L2_BUCKET_SIZE - 1)) / L2_BUCKET_SIZE;
- pmap_alloc_specials(&virtual_avail,
- round_page(size * sizeof(struct l2_dtable)) / PAGE_SIZE,
- &pmap_kernel_l2dtable_kva, NULL);
-
- pmap_alloc_specials(&virtual_avail,
- 1, (vm_offset_t*)&_tmppt, NULL);
- pmap_alloc_specials(&virtual_avail,
- MAXDUMPPGS, (vm_offset_t *)&crashdumpmap, NULL);
- SLIST_INIT(&l1_list);
- TAILQ_INIT(&l1_lru_list);
- mtx_init(&l1_lru_lock, "l1 list lock", NULL, MTX_DEF);
- pmap_init_l1(l1, kernel_l1pt);
- cpu_dcache_wbinv_all();
- cpu_l2cache_wbinv_all();
- cpu_tlb_flushID();
- cpu_cpwait();
-
- virtual_avail = round_page(virtual_avail);
- virtual_end = vm_max_kernel_address;
- kernel_vm_end = pmap_curmaxkvaddr;
-
- pmap_set_pcb_pagedir(kernel_pmap, thread0.td_pcb);
-}
-
-
-/***************************************************
- * Pmap allocation/deallocation routines.
- ***************************************************/
-
-/*
- * Release any resources held by the given physical map.
- * Called when a pmap initialized by pmap_pinit is being released.
- * Should only be called if the map contains no valid mappings.
- */
-void
-pmap_release(pmap_t pmap)
-{
- struct pcb *pcb;
-
- cpu_tlb_flushID();
- cpu_cpwait();
- if (vector_page < KERNBASE) {
- struct pcb *curpcb = PCPU_GET(curpcb);
- pcb = thread0.td_pcb;
- if (pmap_is_current(pmap)) {
- /*
- * Frob the L1 entry corresponding to the vector
- * page so that it contains the kernel pmap's domain
- * number. This will ensure pmap_remove() does not
- * pull the current vector page out from under us.
- */
- critical_enter();
- *pcb->pcb_pl1vec = pcb->pcb_l1vec;
- cpu_domains(pcb->pcb_dacr);
- cpu_setttb(pcb->pcb_pagedir);
- critical_exit();
- }
- pmap_remove(pmap, vector_page, vector_page + PAGE_SIZE);
- /*
- * Make sure cpu_switch(), et al, DTRT. This is safe to do
- * since this process has no remaining mappings of its own.
- */
- curpcb->pcb_pl1vec = pcb->pcb_pl1vec;
- curpcb->pcb_l1vec = pcb->pcb_l1vec;
- curpcb->pcb_dacr = pcb->pcb_dacr;
- curpcb->pcb_pagedir = pcb->pcb_pagedir;
-
- }
- pmap_free_l1(pmap);
-
- dprintf("pmap_release()\n");
-}
-
-
-
-/*
- * Helper function for pmap_grow_l2_bucket()
- */
-static __inline int
-pmap_grow_map(vm_offset_t va, pt_entry_t cache_mode, vm_paddr_t *pap)
-{
- struct l2_bucket *l2b;
- pt_entry_t *ptep;
- vm_paddr_t pa;
- struct vm_page *m;
-
- m = vm_page_alloc(NULL, 0, VM_ALLOC_NOOBJ | VM_ALLOC_WIRED);
- if (m == NULL)
- return (1);
- pa = VM_PAGE_TO_PHYS(m);
-
- if (pap)
- *pap = pa;
-
- l2b = pmap_get_l2_bucket(pmap_kernel(), va);
-
- ptep = &l2b->l2b_kva[l2pte_index(va)];
- *ptep = L2_S_PROTO | pa | cache_mode | L2_S_REF;
- pmap_set_prot(ptep, VM_PROT_READ | VM_PROT_WRITE, 0);
- PTE_SYNC(ptep);
- cpu_tlb_flushD_SE(va);
- cpu_cpwait();
-
- return (0);
-}
-
-/*
- * This is the same as pmap_alloc_l2_bucket(), except that it is only
- * used by pmap_growkernel().
- */
-static __inline struct l2_bucket *
-pmap_grow_l2_bucket(pmap_t pmap, vm_offset_t va)
-{
- struct l2_dtable *l2;
- struct l2_bucket *l2b;
- struct l1_ttable *l1;
- pd_entry_t *pl1pd;
- u_short l1idx;
- vm_offset_t nva;
-
- l1idx = L1_IDX(va);
-
- if ((l2 = pmap->pm_l2[L2_IDX(l1idx)]) == NULL) {
- /*
- * No mapping at this address, as there is
- * no entry in the L1 table.
- * Need to allocate a new l2_dtable.
- */
- nva = pmap_kernel_l2dtable_kva;
- if ((nva & PAGE_MASK) == 0) {
- /*
- * Need to allocate a backing page
- */
- if (pmap_grow_map(nva, pte_l2_s_cache_mode, NULL))
- return (NULL);
- }
-
- l2 = (struct l2_dtable *)nva;
- nva += sizeof(struct l2_dtable);
-
- if ((nva & PAGE_MASK) < (pmap_kernel_l2dtable_kva &
- PAGE_MASK)) {
- /*
- * The new l2_dtable straddles a page boundary.
- * Map in another page to cover it.
- */
- if (pmap_grow_map(nva, pte_l2_s_cache_mode, NULL))
- return (NULL);
- }
-
- pmap_kernel_l2dtable_kva = nva;
-
- /*
- * Link it into the parent pmap
- */
- pmap->pm_l2[L2_IDX(l1idx)] = l2;
- memset(l2, 0, sizeof(*l2));
- }
-
- l2b = &l2->l2_bucket[L2_BUCKET(l1idx)];
-
- /*
- * Fetch pointer to the L2 page table associated with the address.
- */
- if (l2b->l2b_kva == NULL) {
- pt_entry_t *ptep;
-
- /*
- * No L2 page table has been allocated. Chances are, this
- * is because we just allocated the l2_dtable, above.
- */
- nva = pmap_kernel_l2ptp_kva;
- ptep = (pt_entry_t *)nva;
- if ((nva & PAGE_MASK) == 0) {
- /*
- * Need to allocate a backing page
- */
- if (pmap_grow_map(nva, pte_l2_s_cache_mode_pt,
- &pmap_kernel_l2ptp_phys))
- return (NULL);
- }
- memset(ptep, 0, L2_TABLE_SIZE_REAL);
- l2->l2_occupancy++;
- l2b->l2b_kva = ptep;
- l2b->l2b_l1idx = l1idx;
- l2b->l2b_phys = pmap_kernel_l2ptp_phys;
-
- pmap_kernel_l2ptp_kva += L2_TABLE_SIZE_REAL;
- pmap_kernel_l2ptp_phys += L2_TABLE_SIZE_REAL;
- }
-
- /* Distribute new L1 entry to all other L1s */
- SLIST_FOREACH(l1, &l1_list, l1_link) {
- pl1pd = &l1->l1_kva[L1_IDX(va)];
- *pl1pd = l2b->l2b_phys | L1_C_DOM(PMAP_DOMAIN_KERNEL) |
- L1_C_PROTO;
- PTE_SYNC(pl1pd);
- }
- cpu_tlb_flushID_SE(va);
- cpu_cpwait();
-
- return (l2b);
-}
-
-
-/*
- * grow the number of kernel page table entries, if needed
- */
-void
-pmap_growkernel(vm_offset_t addr)
-{
- pmap_t kpmap = pmap_kernel();
-
- if (addr <= pmap_curmaxkvaddr)
- return; /* we are OK */
-
- /*
- * whoops! we need to add kernel PTPs
- */
-
- /* Map 1MB at a time */
- for (; pmap_curmaxkvaddr < addr; pmap_curmaxkvaddr += L1_S_SIZE)
- pmap_grow_l2_bucket(kpmap, pmap_curmaxkvaddr);
-
- kernel_vm_end = pmap_curmaxkvaddr;
-}
-
-/*
- * Returns TRUE if the given page is mapped individually or as part of
- * a 1MB section. Otherwise, returns FALSE.
- */
-boolean_t
-pmap_page_is_mapped(vm_page_t m)
-{
- boolean_t rv;
-
- if ((m->oflags & VPO_UNMANAGED) != 0)
- return (FALSE);
- rw_wlock(&pvh_global_lock);
- rv = !TAILQ_EMPTY(&m->md.pv_list) ||
- ((m->flags & PG_FICTITIOUS) == 0 &&
- !TAILQ_EMPTY(&pa_to_pvh(VM_PAGE_TO_PHYS(m))->pv_list));
- rw_wunlock(&pvh_global_lock);
- return (rv);
-}
-
-/*
- * Remove all pages from specified address space
- * this aids process exit speeds. Also, this code
- * is special cased for current process only, but
- * can have the more generic (and slightly slower)
- * mode enabled. This is much faster than pmap_remove
- * in the case of running down an entire address space.
- */
-void
-pmap_remove_pages(pmap_t pmap)
-{
- struct pv_entry *pv;
- struct l2_bucket *l2b = NULL;
- struct pv_chunk *pc, *npc;
- struct md_page *pvh;
- pd_entry_t *pl1pd, l1pd;
- pt_entry_t *ptep;
- vm_page_t m, mt;
- vm_offset_t va;
- uint32_t inuse, bitmask;
- int allfree, bit, field, idx;
-
- rw_wlock(&pvh_global_lock);
- PMAP_LOCK(pmap);
-
- TAILQ_FOREACH_SAFE(pc, &pmap->pm_pvchunk, pc_list, npc) {
- allfree = 1;
- for (field = 0; field < _NPCM; field++) {
- inuse = ~pc->pc_map[field] & pc_freemask[field];
- while (inuse != 0) {
- bit = ffs(inuse) - 1;
- bitmask = 1ul << bit;
- idx = field * sizeof(inuse) * NBBY + bit;
- pv = &pc->pc_pventry[idx];
- va = pv->pv_va;
- inuse &= ~bitmask;
- if (pv->pv_flags & PVF_WIRED) {
- /* Cannot remove wired pages now. */
- allfree = 0;
- continue;
- }
- pl1pd = &pmap->pm_l1->l1_kva[L1_IDX(va)];
- l1pd = *pl1pd;
- l2b = pmap_get_l2_bucket(pmap, va);
- if ((l1pd & L1_TYPE_MASK) == L1_S_PROTO) {
- pvh = pa_to_pvh(l1pd & L1_S_FRAME);
- TAILQ_REMOVE(&pvh->pv_list, pv, pv_list);
- if (TAILQ_EMPTY(&pvh->pv_list)) {
- m = PHYS_TO_VM_PAGE(l1pd & L1_S_FRAME);
- KASSERT((vm_offset_t)m >= KERNBASE,
- ("Trying to access non-existent page "
- "va %x l1pd %x", trunc_1mpage(va), l1pd));
- for (mt = m; mt < &m[L2_PTE_NUM_TOTAL]; mt++) {
- if (TAILQ_EMPTY(&mt->md.pv_list))
- vm_page_aflag_clear(mt, PGA_WRITEABLE);
- }
- }
- if (l2b != NULL) {
- KASSERT(l2b->l2b_occupancy == L2_PTE_NUM_TOTAL,
- ("pmap_remove_pages: l2_bucket occupancy error"));
- pmap_free_l2_bucket(pmap, l2b, L2_PTE_NUM_TOTAL);
- }
- pmap->pm_stats.resident_count -= L2_PTE_NUM_TOTAL;
- *pl1pd = 0;
- PTE_SYNC(pl1pd);
- } else {
- KASSERT(l2b != NULL,
- ("No L2 bucket in pmap_remove_pages"));
- ptep = &l2b->l2b_kva[l2pte_index(va)];
- m = PHYS_TO_VM_PAGE(l2pte_pa(*ptep));
- KASSERT((vm_offset_t)m >= KERNBASE,
- ("Trying to access non-existent page "
- "va %x pte %x", va, *ptep));
- TAILQ_REMOVE(&m->md.pv_list, pv, pv_list);
- if (TAILQ_EMPTY(&m->md.pv_list) &&
- (m->flags & PG_FICTITIOUS) == 0) {
- pvh = pa_to_pvh(l2pte_pa(*ptep));
- if (TAILQ_EMPTY(&pvh->pv_list))
- vm_page_aflag_clear(m, PGA_WRITEABLE);
- }
- *ptep = 0;
- PTE_SYNC(ptep);
- pmap_free_l2_bucket(pmap, l2b, 1);
- pmap->pm_stats.resident_count--;
- }
-
- /* Mark free */
- PV_STAT(pv_entry_frees++);
- PV_STAT(pv_entry_spare++);
- pv_entry_count--;
- pc->pc_map[field] |= bitmask;
- }
- }
- if (allfree) {
- TAILQ_REMOVE(&pmap->pm_pvchunk, pc, pc_list);
- pmap_free_pv_chunk(pc);
- }
-
- }
-
- rw_wunlock(&pvh_global_lock);
- cpu_tlb_flushID();
- cpu_cpwait();
- PMAP_UNLOCK(pmap);
-}
-
-static void
-pmap_init_qpages(void)
-{
- struct pcpu *pc;
- struct l2_bucket *l2b;
- int i;
-
- CPU_FOREACH(i) {
- pc = pcpu_find(i);
- pc->pc_qmap_addr = kva_alloc(PAGE_SIZE);
- if (pc->pc_qmap_addr == 0)
- panic("pmap_init_qpages: unable to allocate KVA");
-
- l2b = pmap_get_l2_bucket(pmap_kernel(), pc->pc_qmap_addr);
- if (l2b == NULL)
- l2b = pmap_grow_l2_bucket(pmap_kernel(),
- pc->pc_qmap_addr);
- if (l2b == NULL)
- panic("pmap_alloc_specials: no l2b for 0x%x",
- pc->pc_qmap_addr);
- pc->pc_qmap_pte = &l2b->l2b_kva[l2pte_index(pc->pc_qmap_addr)];
- }
-}
-
-SYSINIT(qpages_init, SI_SUB_CPU, SI_ORDER_ANY, pmap_init_qpages, NULL);
-
-/***************************************************
- * Low level mapping routines.....
- ***************************************************/
-
-#ifdef ARM_HAVE_SUPERSECTIONS
-/* Map a super section into the KVA. */
-
-void
-pmap_kenter_supersection(vm_offset_t va, uint64_t pa, int flags)
-{
- pd_entry_t pd = L1_S_PROTO | L1_S_SUPERSEC | (pa & L1_SUP_FRAME) |
- (((pa >> 32) & 0xf) << 20) | L1_S_PROT(PTE_KERNEL,
- VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE) |
- L1_S_DOM(PMAP_DOMAIN_KERNEL);
- struct l1_ttable *l1;
- vm_offset_t va0, va_end;
-
- KASSERT(((va | pa) & L1_SUP_OFFSET) == 0,
- ("Not a valid super section mapping"));
- if (flags & SECTION_CACHE)
- pd |= pte_l1_s_cache_mode;
- else if (flags & SECTION_PT)
- pd |= pte_l1_s_cache_mode_pt;
-
- va0 = va & L1_SUP_FRAME;
- va_end = va + L1_SUP_SIZE;
- SLIST_FOREACH(l1, &l1_list, l1_link) {
- va = va0;
- for (; va < va_end; va += L1_S_SIZE) {
- l1->l1_kva[L1_IDX(va)] = pd;
- PTE_SYNC(&l1->l1_kva[L1_IDX(va)]);
- }
- }
-}
-#endif
-
-/* Map a section into the KVA. */
-
-void
-pmap_kenter_section(vm_offset_t va, vm_offset_t pa, int flags)
-{
- pd_entry_t pd = L1_S_PROTO | pa | L1_S_PROT(PTE_KERNEL,
- VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE) | L1_S_REF |
- L1_S_DOM(PMAP_DOMAIN_KERNEL);
- struct l1_ttable *l1;
-
- KASSERT(((va | pa) & L1_S_OFFSET) == 0,
- ("Not a valid section mapping"));
- if (flags & SECTION_CACHE)
- pd |= pte_l1_s_cache_mode;
- else if (flags & SECTION_PT)
- pd |= pte_l1_s_cache_mode_pt;
-
- SLIST_FOREACH(l1, &l1_list, l1_link) {
- l1->l1_kva[L1_IDX(va)] = pd;
- PTE_SYNC(&l1->l1_kva[L1_IDX(va)]);
- }
- cpu_tlb_flushID_SE(va);
- cpu_cpwait();
-}
-
-/*
- * Make a temporary mapping for a physical address. This is only intended
- * to be used for panic dumps.
- */
-void *
-pmap_kenter_temporary(vm_paddr_t pa, int i)
-{
- vm_offset_t va;
-
- va = (vm_offset_t)crashdumpmap + (i * PAGE_SIZE);
- pmap_kenter(va, pa);
- return ((void *)crashdumpmap);
-}
-
-/*
- * add a wired page to the kva
- * note that in order for the mapping to take effect -- you
- * should do a invltlb after doing the pmap_kenter...
- */
-static PMAP_INLINE void
-pmap_kenter_internal(vm_offset_t va, vm_offset_t pa, int flags)
-{
- struct l2_bucket *l2b;
- pt_entry_t *ptep;
- pt_entry_t opte;
-
- PDEBUG(1, printf("pmap_kenter: va = %08x, pa = %08x\n",
- (uint32_t) va, (uint32_t) pa));
-
-
- l2b = pmap_get_l2_bucket(pmap_kernel(), va);
- if (l2b == NULL)
- l2b = pmap_grow_l2_bucket(pmap_kernel(), va);
- KASSERT(l2b != NULL, ("No L2 Bucket"));
-
- ptep = &l2b->l2b_kva[l2pte_index(va)];
- opte = *ptep;
-
- if (flags & KENTER_CACHE)
- *ptep = L2_S_PROTO | l2s_mem_types[PTE_CACHE] | pa | L2_S_REF;
- else if (flags & KENTER_DEVICE)
- *ptep = L2_S_PROTO | l2s_mem_types[PTE_DEVICE] | pa | L2_S_REF;
- else
- *ptep = L2_S_PROTO | l2s_mem_types[PTE_NOCACHE] | pa | L2_S_REF;
-
- if (flags & KENTER_CACHE) {
- pmap_set_prot(ptep, VM_PROT_READ | VM_PROT_WRITE,
- flags & KENTER_USER);
- } else {
- pmap_set_prot(ptep, VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE,
- 0);
- }
-
- PTE_SYNC(ptep);
- if (l2pte_valid(opte)) {
- if (L2_S_EXECUTABLE(opte) || L2_S_EXECUTABLE(*ptep))
- cpu_tlb_flushID_SE(va);
- else
- cpu_tlb_flushD_SE(va);
- } else {
- if (opte == 0)
- l2b->l2b_occupancy++;
- }
- cpu_cpwait();
-
- PDEBUG(1, printf("pmap_kenter: pte = %08x, opte = %08x, npte = %08x\n",
- (uint32_t) ptep, opte, *ptep));
-}
-
-void
-pmap_kenter(vm_offset_t va, vm_paddr_t pa)
-{
- pmap_kenter_internal(va, pa, KENTER_CACHE);
-}
-
-void
-pmap_kenter_nocache(vm_offset_t va, vm_paddr_t pa)
-{
-
- pmap_kenter_internal(va, pa, 0);
-}
-
-void
-pmap_kenter_device(vm_offset_t va, vm_size_t size, vm_paddr_t pa)
-{
- vm_offset_t sva;
-
- KASSERT((size & PAGE_MASK) == 0,
- ("%s: device mapping not page-sized", __func__));
-
- sva = va;
- while (size != 0) {
- pmap_kenter_internal(va, pa, KENTER_DEVICE);
- va += PAGE_SIZE;
- pa += PAGE_SIZE;
- size -= PAGE_SIZE;
- }
-}
-
-void
-pmap_kremove_device(vm_offset_t va, vm_size_t size)
-{
- vm_offset_t sva;
-
- KASSERT((size & PAGE_MASK) == 0,
- ("%s: device mapping not page-sized", __func__));
-
- sva = va;
- while (size != 0) {
- pmap_kremove(va);
- va += PAGE_SIZE;
- size -= PAGE_SIZE;
- }
-}
-
-void
-pmap_kenter_user(vm_offset_t va, vm_paddr_t pa)
-{
-
- pmap_kenter_internal(va, pa, KENTER_CACHE|KENTER_USER);
- /*
- * Call pmap_fault_fixup now, to make sure we'll have no exception
- * at the first use of the new address, or bad things will happen,
- * as we use one of these addresses in the exception handlers.
- */
- pmap_fault_fixup(pmap_kernel(), va, VM_PROT_READ|VM_PROT_WRITE, 1);
-}
-
-vm_paddr_t
-pmap_kextract(vm_offset_t va)
-{
-
- if (kernel_vm_end == 0)
- return (0);
- return (pmap_extract_locked(kernel_pmap, va));
-}
-
-/*
- * remove a page from the kernel pagetables
- */
-void
-pmap_kremove(vm_offset_t va)
-{
- struct l2_bucket *l2b;
- pt_entry_t *ptep, opte;
-
- l2b = pmap_get_l2_bucket(pmap_kernel(), va);
- if (!l2b)
- return;
- KASSERT(l2b != NULL, ("No L2 Bucket"));
- ptep = &l2b->l2b_kva[l2pte_index(va)];
- opte = *ptep;
- if (l2pte_valid(opte)) {
- va = va & ~PAGE_MASK;
- *ptep = 0;
- PTE_SYNC(ptep);
- if (L2_S_EXECUTABLE(opte))
- cpu_tlb_flushID_SE(va);
- else
- cpu_tlb_flushD_SE(va);
- cpu_cpwait();
- }
-}
-
-
-/*
- * Used to map a range of physical addresses into kernel
- * virtual address space.
- *
- * The value passed in '*virt' is a suggested virtual address for
- * the mapping. Architectures which can support a direct-mapped
- * physical to virtual region can return the appropriate address
- * within that region, leaving '*virt' unchanged. Other
- * architectures should map the pages starting at '*virt' and
- * update '*virt' with the first usable address after the mapped
- * region.
- */
-vm_offset_t
-pmap_map(vm_offset_t *virt, vm_offset_t start, vm_offset_t end, int prot)
-{
- vm_offset_t sva = *virt;
- vm_offset_t va = sva;
-
- PDEBUG(1, printf("pmap_map: virt = %08x, start = %08x, end = %08x, "
- "prot = %d\n", (uint32_t) *virt, (uint32_t) start, (uint32_t) end,
- prot));
-
- while (start < end) {
- pmap_kenter(va, start);
- va += PAGE_SIZE;
- start += PAGE_SIZE;
- }
- *virt = va;
- return (sva);
-}
-
-/*
- * Add a list of wired pages to the kva
- * this routine is only used for temporary
- * kernel mappings that do not need to have
- * page modification or references recorded.
- * Note that old mappings are simply written
- * over. The page *must* be wired.
- */
-void
-pmap_qenter(vm_offset_t va, vm_page_t *m, int count)
-{
- int i;
-
- for (i = 0; i < count; i++) {
- pmap_kenter_internal(va, VM_PAGE_TO_PHYS(m[i]),
- KENTER_CACHE);
- va += PAGE_SIZE;
- }
-}
-
-
-/*
- * this routine jerks page mappings from the
- * kernel -- it is meant only for temporary mappings.
- */
-void
-pmap_qremove(vm_offset_t va, int count)
-{
- int i;
-
- for (i = 0; i < count; i++) {
- if (vtophys(va))
- pmap_kremove(va);
-
- va += PAGE_SIZE;
- }
-}
-
-
-/*
- * pmap_object_init_pt preloads the ptes for a given object
- * into the specified pmap. This eliminates the blast of soft
- * faults on process startup and immediately after an mmap.
- */
-void
-pmap_object_init_pt(pmap_t pmap, vm_offset_t addr, vm_object_t object,
- vm_pindex_t pindex, vm_size_t size)
-{
-
- VM_OBJECT_ASSERT_WLOCKED(object);
- KASSERT(object->type == OBJT_DEVICE || object->type == OBJT_SG,
- ("pmap_object_init_pt: non-device object"));
-}
-
-
-/*
- * pmap_is_prefaultable:
- *
- * Return whether or not the specified virtual address is elgible
- * for prefault.
- */
-boolean_t
-pmap_is_prefaultable(pmap_t pmap, vm_offset_t addr)
-{
- pd_entry_t *pdep;
- pt_entry_t *ptep;
-
- if (!pmap_get_pde_pte(pmap, addr, &pdep, &ptep))
- return (FALSE);
- KASSERT((pdep != NULL && (l1pte_section_p(*pdep) || ptep != NULL)),
- ("Valid mapping but no pte ?"));
- if (*pdep != 0 && !l1pte_section_p(*pdep))
- if (*ptep == 0)
- return (TRUE);
- return (FALSE);
-}
-
-/*
- * Fetch pointers to the PDE/PTE for the given pmap/VA pair.
- * Returns TRUE if the mapping exists, else FALSE.
- *
- * NOTE: This function is only used by a couple of arm-specific modules.
- * It is not safe to take any pmap locks here, since we could be right
- * in the middle of debugging the pmap anyway...
- *
- * It is possible for this routine to return FALSE even though a valid
- * mapping does exist. This is because we don't lock, so the metadata
- * state may be inconsistent.
- *
- * NOTE: We can return a NULL *ptp in the case where the L1 pde is
- * a "section" mapping.
- */
-boolean_t
-pmap_get_pde_pte(pmap_t pmap, vm_offset_t va, pd_entry_t **pdp,
- pt_entry_t **ptp)
-{
- struct l2_dtable *l2;
- pd_entry_t *pl1pd, l1pd;
- pt_entry_t *ptep;
- u_short l1idx;
-
- if (pmap->pm_l1 == NULL)
- return (FALSE);
-
- l1idx = L1_IDX(va);
- *pdp = pl1pd = &pmap->pm_l1->l1_kva[l1idx];
- l1pd = *pl1pd;
-
- if (l1pte_section_p(l1pd)) {
- *ptp = NULL;
- return (TRUE);
- }
-
- if (pmap->pm_l2 == NULL)
- return (FALSE);
-
- l2 = pmap->pm_l2[L2_IDX(l1idx)];
-
- if (l2 == NULL ||
- (ptep = l2->l2_bucket[L2_BUCKET(l1idx)].l2b_kva) == NULL) {
- return (FALSE);
- }
-
- *ptp = &ptep[l2pte_index(va)];
- return (TRUE);
-}
-
-/*
- * Routine: pmap_remove_all
- * Function:
- * Removes this physical page from
- * all physical maps in which it resides.
- * Reflects back modify bits to the pager.
- *
- * Notes:
- * Original versions of this routine were very
- * inefficient because they iteratively called
- * pmap_remove (slow...)
- */
-void
-pmap_remove_all(vm_page_t m)
-{
- struct md_page *pvh;
- pv_entry_t pv;
- pmap_t pmap;
- pt_entry_t *ptep;
- struct l2_bucket *l2b;
- boolean_t flush = FALSE;
- pmap_t curpmap;
- u_int is_exec = 0;
-
- KASSERT((m->oflags & VPO_UNMANAGED) == 0,
- ("pmap_remove_all: page %p is not managed", m));
- rw_wlock(&pvh_global_lock);
- if ((m->flags & PG_FICTITIOUS) != 0)
- goto small_mappings;
- pvh = pa_to_pvh(VM_PAGE_TO_PHYS(m));
- while ((pv = TAILQ_FIRST(&pvh->pv_list)) != NULL) {
- pmap = PV_PMAP(pv);
- PMAP_LOCK(pmap);
- pd_entry_t *pl1pd;
- pl1pd = &pmap->pm_l1->l1_kva[L1_IDX(pv->pv_va)];
- KASSERT((*pl1pd & L1_TYPE_MASK) == L1_S_PROTO,
- ("pmap_remove_all: valid section mapping expected"));
- (void)pmap_demote_section(pmap, pv->pv_va);
- PMAP_UNLOCK(pmap);
- }
-small_mappings:
- curpmap = vmspace_pmap(curproc->p_vmspace);
- while ((pv = TAILQ_FIRST(&m->md.pv_list)) != NULL) {
- pmap = PV_PMAP(pv);
- if (flush == FALSE && (pmap == curpmap ||
- pmap == pmap_kernel()))
- flush = TRUE;
-
- PMAP_LOCK(pmap);
- l2b = pmap_get_l2_bucket(pmap, pv->pv_va);
- KASSERT(l2b != NULL, ("No l2 bucket"));
- ptep = &l2b->l2b_kva[l2pte_index(pv->pv_va)];
- is_exec |= PTE_BEEN_EXECD(*ptep);
- *ptep = 0;
- if (pmap_is_current(pmap))
- PTE_SYNC(ptep);
- pmap_free_l2_bucket(pmap, l2b, 1);
- pmap->pm_stats.resident_count--;
- TAILQ_REMOVE(&m->md.pv_list, pv, pv_list);
- if (pv->pv_flags & PVF_WIRED)
- pmap->pm_stats.wired_count--;
- pmap_free_pv_entry(pmap, pv);
- PMAP_UNLOCK(pmap);
- }
-
- if (flush) {
- if (is_exec)
- cpu_tlb_flushID();
- else
- cpu_tlb_flushD();
- cpu_cpwait();
- }
- vm_page_aflag_clear(m, PGA_WRITEABLE);
- rw_wunlock(&pvh_global_lock);
-}
-
-int
-pmap_change_attr(vm_offset_t sva, vm_size_t len, int mode)
-{
- vm_offset_t base, offset, tmpva;
- vm_size_t size;
- struct l2_bucket *l2b;
- pt_entry_t *ptep, pte;
- vm_offset_t next_bucket;
-
- PMAP_LOCK(kernel_pmap);
-
- base = trunc_page(sva);
- offset = sva & PAGE_MASK;
- size = roundup(offset + len, PAGE_SIZE);
-
- for (tmpva = base; tmpva < base + size; ) {
- next_bucket = L2_NEXT_BUCKET(tmpva);
- if (next_bucket > base + size)
- next_bucket = base + size;
-
- l2b = pmap_get_l2_bucket(kernel_pmap, tmpva);
- if (l2b == NULL) {
- tmpva = next_bucket;
- continue;
- }
-
- ptep = &l2b->l2b_kva[l2pte_index(tmpva)];
-
- if (*ptep == 0) {
- PMAP_UNLOCK(kernel_pmap);
- return(EINVAL);
- }
-
- pte = *ptep &~ L2_S_CACHE_MASK;
- cpu_idcache_wbinv_range(tmpva, PAGE_SIZE);
- pmap_l2cache_wbinv_range(tmpva, pte & L2_S_FRAME, PAGE_SIZE);
- *ptep = pte;
- cpu_tlb_flushID_SE(tmpva);
- cpu_cpwait();
-
- dprintf("%s: for va:%x ptep:%x pte:%x\n",
- __func__, tmpva, (uint32_t)ptep, pte);
- tmpva += PAGE_SIZE;
- }
-
- PMAP_UNLOCK(kernel_pmap);
-
- return (0);
-}
-
-/*
- * Set the physical protection on the
- * specified range of this map as requested.
- */
-void
-pmap_protect(pmap_t pmap, vm_offset_t sva, vm_offset_t eva, vm_prot_t prot)
-{
- struct l2_bucket *l2b;
- struct md_page *pvh;
- struct pv_entry *pve;
- pd_entry_t *pl1pd, l1pd;
- pt_entry_t *ptep, pte;
- vm_offset_t next_bucket;
- u_int is_exec, is_refd;
- int flush;
-
- if ((prot & VM_PROT_READ) == 0) {
- pmap_remove(pmap, sva, eva);
- return;
- }
-
- if (prot & VM_PROT_WRITE) {
- /*
- * If this is a read->write transition, just ignore it and let
- * vm_fault() take care of it later.
- */
- return;
- }
-
- rw_wlock(&pvh_global_lock);
- PMAP_LOCK(pmap);
-
- /*
- * OK, at this point, we know we're doing write-protect operation.
- * If the pmap is active, write-back the range.
- */
-
- flush = ((eva - sva) >= (PAGE_SIZE * 4)) ? 0 : -1;
- is_exec = is_refd = 0;
-
- while (sva < eva) {
- next_bucket = L2_NEXT_BUCKET(sva);
- /*
- * Check for large page.
- */
- pl1pd = &pmap->pm_l1->l1_kva[L1_IDX(sva)];
- l1pd = *pl1pd;
- if ((l1pd & L1_TYPE_MASK) == L1_S_PROTO) {
- KASSERT(pmap != pmap_kernel(),
- ("pmap_protect: trying to modify "
- "kernel section protections"));
- /*
- * Are we protecting the entire large page? If not,
- * demote the mapping and fall through.
- */
- if (sva + L1_S_SIZE == next_bucket &&
- eva >= next_bucket) {
- l1pd &= ~(L1_S_PROT_MASK | L1_S_XN);
- if (!(prot & VM_PROT_EXECUTE))
- l1pd |= L1_S_XN;
- /*
- * At this point we are always setting
- * write-protect bit.
- */
- l1pd |= L1_S_APX;
- /* All managed superpages are user pages. */
- l1pd |= L1_S_PROT_U;
- *pl1pd = l1pd;
- PTE_SYNC(pl1pd);
- pvh = pa_to_pvh(l1pd & L1_S_FRAME);
- pve = pmap_find_pv(pvh, pmap,
- trunc_1mpage(sva));
- pve->pv_flags &= ~PVF_WRITE;
- sva = next_bucket;
- continue;
- } else if (!pmap_demote_section(pmap, sva)) {
- /* The large page mapping was destroyed. */
- sva = next_bucket;
- continue;
- }
- }
- if (next_bucket > eva)
- next_bucket = eva;
- l2b = pmap_get_l2_bucket(pmap, sva);
- if (l2b == NULL) {
- sva = next_bucket;
- continue;
- }
-
- ptep = &l2b->l2b_kva[l2pte_index(sva)];
-
- while (sva < next_bucket) {
- if ((pte = *ptep) != 0 && L2_S_WRITABLE(pte)) {
- struct vm_page *m;
-
- m = PHYS_TO_VM_PAGE(l2pte_pa(pte));
- pmap_set_prot(ptep, prot,
- !(pmap == pmap_kernel()));
- PTE_SYNC(ptep);
-
- pmap_modify_pv(m, pmap, sva, PVF_WRITE, 0);
-
- if (flush >= 0) {
- flush++;
- is_exec |= PTE_BEEN_EXECD(pte);
- is_refd |= PTE_BEEN_REFD(pte);
- } else {
- if (PTE_BEEN_EXECD(pte))
- cpu_tlb_flushID_SE(sva);
- else if (PTE_BEEN_REFD(pte))
- cpu_tlb_flushD_SE(sva);
- }
- }
-
- sva += PAGE_SIZE;
- ptep++;
- }
- }
-
-
- if (flush) {
- if (is_exec)
- cpu_tlb_flushID();
- else
- if (is_refd)
- cpu_tlb_flushD();
- cpu_cpwait();
- }
- rw_wunlock(&pvh_global_lock);
-
- PMAP_UNLOCK(pmap);
-}
-
-
-/*
- * Insert the given physical page (p) at
- * the specified virtual address (v) in the
- * target physical map with the protection requested.
- *
- * If specified, the page will be wired down, meaning
- * that the related pte can not be reclaimed.
- *
- * NB: This is the only routine which MAY NOT lazy-evaluate
- * or lose information. That is, this routine must actually
- * insert this page into the given map NOW.
- */
-
-int
-pmap_enter(pmap_t pmap, vm_offset_t va, vm_page_t m, vm_prot_t prot,
- u_int flags, int8_t psind __unused)
-{
- struct l2_bucket *l2b;
- int rv;
-
- rw_wlock(&pvh_global_lock);
- PMAP_LOCK(pmap);
- rv = pmap_enter_locked(pmap, va, m, prot, flags);
- if (rv == KERN_SUCCESS) {
- /*
- * If both the l2b_occupancy and the reservation are fully
- * populated, then attempt promotion.
- */
- l2b = pmap_get_l2_bucket(pmap, va);
- if (l2b != NULL && l2b->l2b_occupancy == L2_PTE_NUM_TOTAL &&
- sp_enabled && (m->flags & PG_FICTITIOUS) == 0 &&
- vm_reserv_level_iffullpop(m) == 0)
- pmap_promote_section(pmap, va);
- }
- PMAP_UNLOCK(pmap);
- rw_wunlock(&pvh_global_lock);
- return (rv);
-}
-
-/*
- * The pvh global and pmap locks must be held.
- */
-static int
-pmap_enter_locked(pmap_t pmap, vm_offset_t va, vm_page_t m, vm_prot_t prot,
- u_int flags)
-{
- struct l2_bucket *l2b = NULL;
- struct vm_page *om;
- struct pv_entry *pve = NULL;
- pd_entry_t *pl1pd, l1pd;
- pt_entry_t *ptep, npte, opte;
- u_int nflags;
- u_int is_exec, is_refd;
- vm_paddr_t pa;
- u_char user;
-
- PMAP_ASSERT_LOCKED(pmap);
- rw_assert(&pvh_global_lock, RA_WLOCKED);
- if (va == vector_page) {
- pa = systempage.pv_pa;
- m = NULL;
- } else {
- if ((m->oflags & VPO_UNMANAGED) == 0 && !vm_page_xbusied(m))
- VM_OBJECT_ASSERT_LOCKED(m->object);
- pa = VM_PAGE_TO_PHYS(m);
- }
-
- pl1pd = &pmap->pm_l1->l1_kva[L1_IDX(va)];
- if ((va < VM_MAXUSER_ADDRESS) &&
- (*pl1pd & L1_TYPE_MASK) == L1_S_PROTO) {
- (void)pmap_demote_section(pmap, va);
- }
-
- user = 0;
- /*
- * Make sure userland mappings get the right permissions
- */
- if (pmap != pmap_kernel() && va != vector_page)
- user = 1;
-
- nflags = 0;
-
- if (prot & VM_PROT_WRITE)
- nflags |= PVF_WRITE;
- if ((flags & PMAP_ENTER_WIRED) != 0)
- nflags |= PVF_WIRED;
-
- PDEBUG(1, printf("pmap_enter: pmap = %08x, va = %08x, m = %08x, "
- "prot = %x, flags = %x\n", (uint32_t) pmap, va, (uint32_t) m,
- prot, flags));
-
- if (pmap == pmap_kernel()) {
- l2b = pmap_get_l2_bucket(pmap, va);
- if (l2b == NULL)
- l2b = pmap_grow_l2_bucket(pmap, va);
- } else {
-do_l2b_alloc:
- l2b = pmap_alloc_l2_bucket(pmap, va);
- if (l2b == NULL) {
- if ((flags & PMAP_ENTER_NOSLEEP) == 0) {
- PMAP_UNLOCK(pmap);
- rw_wunlock(&pvh_global_lock);
- VM_WAIT;
- rw_wlock(&pvh_global_lock);
- PMAP_LOCK(pmap);
- goto do_l2b_alloc;
- }
- return (KERN_RESOURCE_SHORTAGE);
- }
- }
-
- pl1pd = &pmap->pm_l1->l1_kva[L1_IDX(va)];
- if ((*pl1pd & L1_TYPE_MASK) == L1_S_PROTO)
- panic("pmap_enter: attempt to enter on 1MB page, va: %#x", va);
-
- ptep = &l2b->l2b_kva[l2pte_index(va)];
-
- opte = *ptep;
- npte = pa;
- is_exec = is_refd = 0;
-
- if (opte) {
- if (l2pte_pa(opte) == pa) {
- /*
- * We're changing the attrs of an existing mapping.
- */
- if (m != NULL)
- pmap_modify_pv(m, pmap, va,
- PVF_WRITE | PVF_WIRED, nflags);
- is_exec |= PTE_BEEN_EXECD(opte);
- is_refd |= PTE_BEEN_REFD(opte);
- goto validate;
- }
- if ((om = PHYS_TO_VM_PAGE(l2pte_pa(opte)))) {
- /*
- * Replacing an existing mapping with a new one.
- * It is part of our managed memory so we
- * must remove it from the PV list
- */
- if ((pve = pmap_remove_pv(om, pmap, va))) {
- is_exec |= PTE_BEEN_EXECD(opte);
- is_refd |= PTE_BEEN_REFD(opte);
-
- if (m && ((m->oflags & VPO_UNMANAGED)))
- pmap_free_pv_entry(pmap, pve);
- }
- }
-
- } else {
- /*
- * Keep the stats up to date
- */
- l2b->l2b_occupancy++;
- pmap->pm_stats.resident_count++;
- }
-
- /*
- * Enter on the PV list if part of our managed memory.
- */
- if ((m && !(m->oflags & VPO_UNMANAGED))) {
- if ((!pve) && (pve = pmap_get_pv_entry(pmap, FALSE)) == NULL)
- panic("pmap_enter: no pv entries");
-
- KASSERT(va < kmi.clean_sva || va >= kmi.clean_eva,
- ("pmap_enter: managed mapping within the clean submap"));
- KASSERT(pve != NULL, ("No pv"));
- pmap_enter_pv(m, pve, pmap, va, nflags);
- }
-
-validate:
- /* Make the new PTE valid */
- npte |= L2_S_PROTO;
-#ifdef SMP
- npte |= L2_SHARED;
-#endif
- /* Set defaults first - kernel read access */
- npte |= L2_APX;
- npte |= L2_S_PROT_R;
- /* Set "referenced" flag */
- npte |= L2_S_REF;
-
- /* Now tune APs as desired */
- if (user)
- npte |= L2_S_PROT_U;
- /*
- * If this is not a vector_page
- * then continue setting mapping parameters
- */
- if (m != NULL) {
- if ((m->oflags & VPO_UNMANAGED) == 0) {
- if (prot & (VM_PROT_ALL)) {
- vm_page_aflag_set(m, PGA_REFERENCED);
- } else {
- /*
- * Need to do page referenced emulation.
- */
- npte &= ~L2_S_REF;
- }
- }
-
- if (prot & VM_PROT_WRITE) {
- if ((m->oflags & VPO_UNMANAGED) == 0) {
- vm_page_aflag_set(m, PGA_WRITEABLE);
- /*
- * XXX: Skip modified bit emulation for now.
- * The emulation reveals problems
- * that result in random failures
- * during memory allocation on some
- * platforms.
- * Therefore, the page is marked RW
- * immediately.
- */
- npte &= ~(L2_APX);
- vm_page_dirty(m);
- } else
- npte &= ~(L2_APX);
- }
- if (!(prot & VM_PROT_EXECUTE))
- npte |= L2_XN;
-
- if (m->md.pv_memattr != VM_MEMATTR_UNCACHEABLE)
- npte |= pte_l2_s_cache_mode;
- }
-
- CTR5(KTR_PMAP,"enter: pmap:%p va:%x prot:%x pte:%x->%x",
- pmap, va, prot, opte, npte);
- /*
- * If this is just a wiring change, the two PTEs will be
- * identical, so there's no need to update the page table.
- */
- if (npte != opte) {
- boolean_t is_cached = pmap_is_current(pmap);
-
- *ptep = npte;
- PTE_SYNC(ptep);
- if (is_cached) {
- /*
- * We only need to frob the cache/tlb if this pmap
- * is current
- */
- if (L1_IDX(va) != L1_IDX(vector_page) &&
- l2pte_valid(npte)) {
- /*
- * This mapping is likely to be accessed as
- * soon as we return to userland. Fix up the
- * L1 entry to avoid taking another
- * page/domain fault.
- */
- l1pd = l2b->l2b_phys |
- L1_C_DOM(pmap->pm_domain) | L1_C_PROTO;
- if (*pl1pd != l1pd) {
- *pl1pd = l1pd;
- PTE_SYNC(pl1pd);
- }
- }
- }
-
- if (is_exec)
- cpu_tlb_flushID_SE(va);
- else if (is_refd)
- cpu_tlb_flushD_SE(va);
- cpu_cpwait();
- }
-
- if ((pmap != pmap_kernel()) && (pmap == &curproc->p_vmspace->vm_pmap))
- cpu_icache_sync_range(va, PAGE_SIZE);
- return (KERN_SUCCESS);
-}
-
-/*
- * Maps a sequence of resident pages belonging to the same object.
- * The sequence begins with the given page m_start. This page is
- * mapped at the given virtual address start. Each subsequent page is
- * mapped at a virtual address that is offset from start by the same
- * amount as the page is offset from m_start within the object. The
- * last page in the sequence is the page with the largest offset from
- * m_start that can be mapped at a virtual address less than the given
- * virtual address end. Not every virtual page between start and end
- * is mapped; only those for which a resident page exists with the
- * corresponding offset from m_start are mapped.
- */
-void
-pmap_enter_object(pmap_t pmap, vm_offset_t start, vm_offset_t end,
- vm_page_t m_start, vm_prot_t prot)
-{
- vm_offset_t va;
- vm_page_t m;
- vm_pindex_t diff, psize;
-
- VM_OBJECT_ASSERT_LOCKED(m_start->object);
-
- psize = atop(end - start);
- m = m_start;
- prot &= VM_PROT_READ | VM_PROT_EXECUTE;
- rw_wlock(&pvh_global_lock);
- PMAP_LOCK(pmap);
- while (m != NULL && (diff = m->pindex - m_start->pindex) < psize) {
- va = start + ptoa(diff);
- if ((va & L1_S_OFFSET) == 0 && L2_NEXT_BUCKET(va) <= end &&
- m->psind == 1 && sp_enabled &&
- pmap_enter_section(pmap, va, m, prot))
- m = &m[L1_S_SIZE / PAGE_SIZE - 1];
- else
- pmap_enter_locked(pmap, va, m, prot,
- PMAP_ENTER_NOSLEEP);
- m = TAILQ_NEXT(m, listq);
- }
- PMAP_UNLOCK(pmap);
- rw_wunlock(&pvh_global_lock);
-}
-
-/*
- * this code makes some *MAJOR* assumptions:
- * 1. Current pmap & pmap exists.
- * 2. Not wired.
- * 3. Read access.
- * 4. No page table pages.
- * but is *MUCH* faster than pmap_enter...
- */
-
-void
-pmap_enter_quick(pmap_t pmap, vm_offset_t va, vm_page_t m, vm_prot_t prot)
-{
-
- prot &= VM_PROT_READ | VM_PROT_EXECUTE;
- rw_wlock(&pvh_global_lock);
- PMAP_LOCK(pmap);
- pmap_enter_locked(pmap, va, m, prot, PMAP_ENTER_NOSLEEP);
- PMAP_UNLOCK(pmap);
- rw_wunlock(&pvh_global_lock);
-}
-
-/*
- * Clear the wired attribute from the mappings for the specified range of
- * addresses in the given pmap. Every valid mapping within that range
- * must have the wired attribute set. In contrast, invalid mappings
- * cannot have the wired attribute set, so they are ignored.
- *
- * XXX Wired mappings of unmanaged pages cannot be counted by this pmap
- * implementation.
- */
-void
-pmap_unwire(pmap_t pmap, vm_offset_t sva, vm_offset_t eva)
-{
- struct l2_bucket *l2b;
- struct md_page *pvh;
- pd_entry_t l1pd;
- pt_entry_t *ptep, pte;
- pv_entry_t pv;
- vm_offset_t next_bucket;
- vm_paddr_t pa;
- vm_page_t m;
-
- rw_wlock(&pvh_global_lock);
- PMAP_LOCK(pmap);
- while (sva < eva) {
- next_bucket = L2_NEXT_BUCKET(sva);
- l1pd = pmap->pm_l1->l1_kva[L1_IDX(sva)];
- if ((l1pd & L1_TYPE_MASK) == L1_S_PROTO) {
- pa = l1pd & L1_S_FRAME;
- m = PHYS_TO_VM_PAGE(pa);
- KASSERT(m != NULL && (m->oflags & VPO_UNMANAGED) == 0,
- ("pmap_unwire: unmanaged 1mpage %p", m));
- pvh = pa_to_pvh(pa);
- pv = pmap_find_pv(pvh, pmap, trunc_1mpage(sva));
- if ((pv->pv_flags & PVF_WIRED) == 0)
- panic("pmap_unwire: pv %p isn't wired", pv);
-
- /*
- * Are we unwiring the entire large page? If not,
- * demote the mapping and fall through.
- */
- if (sva + L1_S_SIZE == next_bucket &&
- eva >= next_bucket) {
- pv->pv_flags &= ~PVF_WIRED;
- pmap->pm_stats.wired_count -= L2_PTE_NUM_TOTAL;
- sva = next_bucket;
- continue;
- } else if (!pmap_demote_section(pmap, sva))
- panic("pmap_unwire: demotion failed");
- }
- if (next_bucket > eva)
- next_bucket = eva;
- l2b = pmap_get_l2_bucket(pmap, sva);
- if (l2b == NULL) {
- sva = next_bucket;
- continue;
- }
- for (ptep = &l2b->l2b_kva[l2pte_index(sva)]; sva < next_bucket;
- sva += PAGE_SIZE, ptep++) {
- if ((pte = *ptep) == 0 ||
- (m = PHYS_TO_VM_PAGE(l2pte_pa(pte))) == NULL ||
- (m->oflags & VPO_UNMANAGED) != 0)
- continue;
- pv = pmap_find_pv(&m->md, pmap, sva);
- if ((pv->pv_flags & PVF_WIRED) == 0)
- panic("pmap_unwire: pv %p isn't wired", pv);
- pv->pv_flags &= ~PVF_WIRED;
- pmap->pm_stats.wired_count--;
- }
- }
- rw_wunlock(&pvh_global_lock);
- PMAP_UNLOCK(pmap);
-}
-
-
-/*
- * Copy the range specified by src_addr/len
- * from the source map to the range dst_addr/len
- * in the destination map.
- *
- * This routine is only advisory and need not do anything.
- */
-void
-pmap_copy(pmap_t dst_pmap, pmap_t src_pmap, vm_offset_t dst_addr,
- vm_size_t len, vm_offset_t src_addr)
-{
-}
-
-
-/*
- * Routine: pmap_extract
- * Function:
- * Extract the physical page address associated
- * with the given map/virtual_address pair.
- */
-vm_paddr_t
-pmap_extract(pmap_t pmap, vm_offset_t va)
-{
- vm_paddr_t pa;
-
- PMAP_LOCK(pmap);
- pa = pmap_extract_locked(pmap, va);
- PMAP_UNLOCK(pmap);
- return (pa);
-}
-
-static vm_paddr_t
-pmap_extract_locked(pmap_t pmap, vm_offset_t va)
-{
- struct l2_dtable *l2;
- pd_entry_t l1pd;
- pt_entry_t *ptep, pte;
- vm_paddr_t pa;
- u_int l1idx;
-
- if (kernel_vm_end != 0 && pmap != kernel_pmap)
- PMAP_ASSERT_LOCKED(pmap);
- l1idx = L1_IDX(va);
- l1pd = pmap->pm_l1->l1_kva[l1idx];
- if (l1pte_section_p(l1pd)) {
- /* XXX: what to do about the bits > 32 ? */
- if (l1pd & L1_S_SUPERSEC)
- pa = (l1pd & L1_SUP_FRAME) | (va & L1_SUP_OFFSET);
- else
- pa = (l1pd & L1_S_FRAME) | (va & L1_S_OFFSET);
- } else {
- /*
- * Note that we can't rely on the validity of the L1
- * descriptor as an indication that a mapping exists.
- * We have to look it up in the L2 dtable.
- */
- l2 = pmap->pm_l2[L2_IDX(l1idx)];
- if (l2 == NULL ||
- (ptep = l2->l2_bucket[L2_BUCKET(l1idx)].l2b_kva) == NULL)
- return (0);
- pte = ptep[l2pte_index(va)];
- if (pte == 0)
- return (0);
- if ((pte & L2_TYPE_MASK) == L2_TYPE_L)
- pa = (pte & L2_L_FRAME) | (va & L2_L_OFFSET);
- else
- pa = (pte & L2_S_FRAME) | (va & L2_S_OFFSET);
- }
- return (pa);
-}
-
-/*
- * Atomically extract and hold the physical page with the given
- * pmap and virtual address pair if that mapping permits the given
- * protection.
- *
- */
-vm_page_t
-pmap_extract_and_hold(pmap_t pmap, vm_offset_t va, vm_prot_t prot)
-{
- struct l2_dtable *l2;
- pd_entry_t l1pd;
- pt_entry_t *ptep, pte;
- vm_paddr_t pa, paddr;
- vm_page_t m = NULL;
- u_int l1idx;
- l1idx = L1_IDX(va);
- paddr = 0;
-
- PMAP_LOCK(pmap);
-retry:
- l1pd = pmap->pm_l1->l1_kva[l1idx];
- if (l1pte_section_p(l1pd)) {
- /* XXX: what to do about the bits > 32 ? */
- if (l1pd & L1_S_SUPERSEC)
- pa = (l1pd & L1_SUP_FRAME) | (va & L1_SUP_OFFSET);
- else
- pa = (l1pd & L1_S_FRAME) | (va & L1_S_OFFSET);
- if (vm_page_pa_tryrelock(pmap, pa & PG_FRAME, &paddr))
- goto retry;
- if (L1_S_WRITABLE(l1pd) || (prot & VM_PROT_WRITE) == 0) {
- m = PHYS_TO_VM_PAGE(pa);
- vm_page_hold(m);
- }
- } else {
- /*
- * Note that we can't rely on the validity of the L1
- * descriptor as an indication that a mapping exists.
- * We have to look it up in the L2 dtable.
- */
- l2 = pmap->pm_l2[L2_IDX(l1idx)];
-
- if (l2 == NULL ||
- (ptep = l2->l2_bucket[L2_BUCKET(l1idx)].l2b_kva) == NULL) {
- PMAP_UNLOCK(pmap);
- return (NULL);
- }
-
- ptep = &ptep[l2pte_index(va)];
- pte = *ptep;
-
- if (pte == 0) {
- PMAP_UNLOCK(pmap);
- return (NULL);
- } else if ((prot & VM_PROT_WRITE) && (pte & L2_APX)) {
- PMAP_UNLOCK(pmap);
- return (NULL);
- } else {
- if ((pte & L2_TYPE_MASK) == L2_TYPE_L)
- panic("extract and hold section mapping");
- else
- pa = (pte & L2_S_FRAME) | (va & L2_S_OFFSET);
- if (vm_page_pa_tryrelock(pmap, pa & PG_FRAME, &paddr))
- goto retry;
- m = PHYS_TO_VM_PAGE(pa);
- vm_page_hold(m);
- }
- }
-
- PMAP_UNLOCK(pmap);
- PA_UNLOCK_COND(paddr);
- return (m);
-}
-
-vm_paddr_t
-pmap_dump_kextract(vm_offset_t va, pt2_entry_t *pte2p)
-{
- struct l2_dtable *l2;
- pd_entry_t l1pd;
- pt_entry_t *ptep, pte;
- vm_paddr_t pa;
- u_int l1idx;
-
- l1idx = L1_IDX(va);
- l1pd = kernel_pmap->pm_l1->l1_kva[l1idx];
- if (l1pte_section_p(l1pd)) {
- if (l1pd & L1_S_SUPERSEC)
- pa = (l1pd & L1_SUP_FRAME) | (va & L1_SUP_OFFSET);
- else
- pa = (l1pd & L1_S_FRAME) | (va & L1_S_OFFSET);
- pte = L2_S_PROTO | pa |
- L2_S_PROT(PTE_KERNEL, VM_PROT_READ | VM_PROT_WRITE);
- } else {
- l2 = kernel_pmap->pm_l2[L2_IDX(l1idx)];
- if (l2 == NULL ||
- (ptep = l2->l2_bucket[L2_BUCKET(l1idx)].l2b_kva) == NULL) {
- pte = 0;
- pa = 0;
- goto out;
- }
- pte = ptep[l2pte_index(va)];
- if (pte == 0) {
- pa = 0;
- goto out;
- }
- if ((pte & L2_TYPE_MASK) == L2_TYPE_L)
- pa = (pte & L2_L_FRAME) | (va & L2_L_OFFSET);
- else
- pa = (pte & L2_S_FRAME) | (va & L2_S_OFFSET);
- }
-out:
- if (pte2p != NULL)
- *pte2p = pte;
- return (pa);
-}
-
-/*
- * Initialize a preallocated and zeroed pmap structure,
- * such as one in a vmspace structure.
- */
-
-int
-pmap_pinit(pmap_t pmap)
-{
- PDEBUG(1, printf("pmap_pinit: pmap = %08x\n", (uint32_t) pmap));
-
- pmap_alloc_l1(pmap);
- bzero(pmap->pm_l2, sizeof(pmap->pm_l2));
-
- CPU_ZERO(&pmap->pm_active);
-
- TAILQ_INIT(&pmap->pm_pvchunk);
- bzero(&pmap->pm_stats, sizeof pmap->pm_stats);
- pmap->pm_stats.resident_count = 1;
- if (vector_page < KERNBASE) {
- pmap_enter(pmap, vector_page,
- PHYS_TO_VM_PAGE(systempage.pv_pa), VM_PROT_READ,
- PMAP_ENTER_WIRED, 0);
- }
- return (1);
-}
-
-
-/***************************************************
- * Superpage management routines.
- ***************************************************/
-
-static PMAP_INLINE struct pv_entry *
-pmap_pvh_remove(struct md_page *pvh, pmap_t pmap, vm_offset_t va)
-{
- pv_entry_t pv;
-
- rw_assert(&pvh_global_lock, RA_WLOCKED);
-
- pv = pmap_find_pv(pvh, pmap, va);
- if (pv != NULL)
- TAILQ_REMOVE(&pvh->pv_list, pv, pv_list);
-
- return (pv);
-}
-
-static void
-pmap_pvh_free(struct md_page *pvh, pmap_t pmap, vm_offset_t va)
-{
- pv_entry_t pv;
-
- pv = pmap_pvh_remove(pvh, pmap, va);
- KASSERT(pv != NULL, ("pmap_pvh_free: pv not found"));
- pmap_free_pv_entry(pmap, pv);
-}
-
-static boolean_t
-pmap_pv_insert_section(pmap_t pmap, vm_offset_t va, vm_paddr_t pa)
-{
- struct md_page *pvh;
- pv_entry_t pv;
-
- rw_assert(&pvh_global_lock, RA_WLOCKED);
- if (pv_entry_count < pv_entry_high_water &&
- (pv = pmap_get_pv_entry(pmap, TRUE)) != NULL) {
- pv->pv_va = va;
- pvh = pa_to_pvh(pa);
- TAILQ_INSERT_TAIL(&pvh->pv_list, pv, pv_list);
- return (TRUE);
- } else
- return (FALSE);
-}
-
-/*
- * Create the pv entries for each of the pages within a superpage.
- */
-static void
-pmap_pv_demote_section(pmap_t pmap, vm_offset_t va, vm_paddr_t pa)
-{
- struct md_page *pvh;
- pv_entry_t pve, pv;
- vm_offset_t va_last;
- vm_page_t m;
-
- rw_assert(&pvh_global_lock, RA_WLOCKED);
- KASSERT((pa & L1_S_OFFSET) == 0,
- ("pmap_pv_demote_section: pa is not 1mpage aligned"));
-
- /*
- * Transfer the 1mpage's pv entry for this mapping to the first
- * page's pv list.
- */
- pvh = pa_to_pvh(pa);
- va = trunc_1mpage(va);
- pv = pmap_pvh_remove(pvh, pmap, va);
- KASSERT(pv != NULL, ("pmap_pv_demote_section: pv not found"));
- m = PHYS_TO_VM_PAGE(pa);
- TAILQ_INSERT_HEAD(&m->md.pv_list, pv, pv_list);
- /* Instantiate the remaining pv entries. */
- va_last = L2_NEXT_BUCKET(va) - PAGE_SIZE;
- do {
- m++;
- KASSERT((m->oflags & VPO_UNMANAGED) == 0,
- ("pmap_pv_demote_section: page %p is not managed", m));
- va += PAGE_SIZE;
- pve = pmap_get_pv_entry(pmap, FALSE);
- pmap_enter_pv(m, pve, pmap, va, pv->pv_flags);
- } while (va < va_last);
-}
-
-static void
-pmap_pv_promote_section(pmap_t pmap, vm_offset_t va, vm_paddr_t pa)
-{
- struct md_page *pvh;
- pv_entry_t pv;
- vm_offset_t va_last;
- vm_page_t m;
-
- rw_assert(&pvh_global_lock, RA_WLOCKED);
- KASSERT((pa & L1_S_OFFSET) == 0,
- ("pmap_pv_promote_section: pa is not 1mpage aligned"));
-
- /*
- * Transfer the first page's pv entry for this mapping to the
- * 1mpage's pv list. Aside from avoiding the cost of a call
- * to get_pv_entry(), a transfer avoids the possibility that
- * get_pv_entry() calls pmap_pv_reclaim() and that pmap_pv_reclaim()
- * removes one of the mappings that is being promoted.
- */
- m = PHYS_TO_VM_PAGE(pa);
- va = trunc_1mpage(va);
- pv = pmap_pvh_remove(&m->md, pmap, va);
- KASSERT(pv != NULL, ("pmap_pv_promote_section: pv not found"));
- pvh = pa_to_pvh(pa);
- TAILQ_INSERT_TAIL(&pvh->pv_list, pv, pv_list);
- /* Free the remaining pv entries in the newly mapped section pages */
- va_last = L2_NEXT_BUCKET(va) - PAGE_SIZE;
- do {
- m++;
- va += PAGE_SIZE;
- /*
- * Don't care the flags, first pv contains sufficient
- * information for all of the pages so nothing is really lost.
- */
- pmap_pvh_free(&m->md, pmap, va);
- } while (va < va_last);
-}
-
-/*
- * Tries to create a 1MB page mapping. Returns TRUE if successful and
- * FALSE otherwise. Fails if (1) page is unmanageg, kernel pmap or vectors
- * page, (2) a mapping already exists at the specified virtual address, or
- * (3) a pv entry cannot be allocated without reclaiming another pv entry.
- */
-static boolean_t
-pmap_enter_section(pmap_t pmap, vm_offset_t va, vm_page_t m, vm_prot_t prot)
-{
- pd_entry_t *pl1pd;
- vm_offset_t pa;
- struct l2_bucket *l2b;
-
- rw_assert(&pvh_global_lock, RA_WLOCKED);
- PMAP_ASSERT_LOCKED(pmap);
-
- /* Skip kernel, vectors page and unmanaged mappings */
- if ((pmap == pmap_kernel()) || (L1_IDX(va) == L1_IDX(vector_page)) ||
- ((m->oflags & VPO_UNMANAGED) != 0)) {
- CTR2(KTR_PMAP, "pmap_enter_section: failure for va %#lx"
- " in pmap %p", va, pmap);
- return (FALSE);
- }
- /*
- * Check whether this is a valid section superpage entry or
- * there is a l2_bucket associated with that L1 page directory.
- */
- va = trunc_1mpage(va);
- pl1pd = &pmap->pm_l1->l1_kva[L1_IDX(va)];
- l2b = pmap_get_l2_bucket(pmap, va);
- if ((*pl1pd & L1_S_PROTO) || (l2b != NULL)) {
- CTR2(KTR_PMAP, "pmap_enter_section: failure for va %#lx"
- " in pmap %p", va, pmap);
- return (FALSE);
- }
- pa = VM_PAGE_TO_PHYS(m);
- /*
- * Abort this mapping if its PV entry could not be created.
- */
- if (!pmap_pv_insert_section(pmap, va, VM_PAGE_TO_PHYS(m))) {
- CTR2(KTR_PMAP, "pmap_enter_section: failure for va %#lx"
- " in pmap %p", va, pmap);
- return (FALSE);
- }
- /*
- * Increment counters.
- */
- pmap->pm_stats.resident_count += L2_PTE_NUM_TOTAL;
- /*
- * Despite permissions, mark the superpage read-only.
- */
- prot &= ~VM_PROT_WRITE;
- /*
- * Map the superpage.
- */
- pmap_map_section(pmap, va, pa, prot, FALSE);
-
- pmap_section_mappings++;
- CTR2(KTR_PMAP, "pmap_enter_section: success for va %#lx"
- " in pmap %p", va, pmap);
- return (TRUE);
-}
-
-/*
- * pmap_remove_section: do the things to unmap a superpage in a process
- */
-static void
-pmap_remove_section(pmap_t pmap, vm_offset_t sva)
-{
- struct md_page *pvh;
- struct l2_bucket *l2b;
- pd_entry_t *pl1pd, l1pd;
- vm_offset_t eva, va;
- vm_page_t m;
-
- PMAP_ASSERT_LOCKED(pmap);
- if ((pmap == pmap_kernel()) || (L1_IDX(sva) == L1_IDX(vector_page)))
- return;
-
- KASSERT((sva & L1_S_OFFSET) == 0,
- ("pmap_remove_section: sva is not 1mpage aligned"));
-
- pl1pd = &pmap->pm_l1->l1_kva[L1_IDX(sva)];
- l1pd = *pl1pd;
-
- m = PHYS_TO_VM_PAGE(l1pd & L1_S_FRAME);
- KASSERT((m != NULL && ((m->oflags & VPO_UNMANAGED) == 0)),
- ("pmap_remove_section: no corresponding vm_page or "
- "page unmanaged"));
-
- pmap->pm_stats.resident_count -= L2_PTE_NUM_TOTAL;
- pvh = pa_to_pvh(l1pd & L1_S_FRAME);
- pmap_pvh_free(pvh, pmap, sva);
- eva = L2_NEXT_BUCKET(sva);
- for (va = sva, m = PHYS_TO_VM_PAGE(l1pd & L1_S_FRAME);
- va < eva; va += PAGE_SIZE, m++) {
- /*
- * Mark base pages referenced but skip marking them dirty.
- * If the superpage is writeable, hence all base pages were
- * already marked as dirty in pmap_fault_fixup() before
- * promotion. Reference bit however, might not have been set
- * for each base page when the superpage was created at once,
- * not as a result of promotion.
- */
- if (L1_S_REFERENCED(l1pd))
- vm_page_aflag_set(m, PGA_REFERENCED);
- if (TAILQ_EMPTY(&m->md.pv_list) &&
- TAILQ_EMPTY(&pvh->pv_list))
- vm_page_aflag_clear(m, PGA_WRITEABLE);
- }
-
- l2b = pmap_get_l2_bucket(pmap, sva);
- if (l2b != NULL) {
- KASSERT(l2b->l2b_occupancy == L2_PTE_NUM_TOTAL,
- ("pmap_remove_section: l2_bucket occupancy error"));
- pmap_free_l2_bucket(pmap, l2b, L2_PTE_NUM_TOTAL);
- }
- /* Now invalidate L1 slot */
- *pl1pd = 0;
- PTE_SYNC(pl1pd);
- if (L1_S_EXECUTABLE(l1pd))
- cpu_tlb_flushID_SE(sva);
- else
- cpu_tlb_flushD_SE(sva);
- cpu_cpwait();
-}
-
-/*
- * Tries to promote the 256, contiguous 4KB page mappings that are
- * within a single l2_bucket to a single 1MB section mapping.
- * For promotion to occur, two conditions must be met: (1) the 4KB page
- * mappings must map aligned, contiguous physical memory and (2) the 4KB page
- * mappings must have identical characteristics.
- */
-static void
-pmap_promote_section(pmap_t pmap, vm_offset_t va)
-{
- pt_entry_t *firstptep, firstpte, oldpte, pa, *pte;
- vm_page_t m, oldm;
- vm_offset_t first_va, old_va;
- struct l2_bucket *l2b = NULL;
- vm_prot_t prot;
- struct pv_entry *pve, *first_pve;
-
- PMAP_ASSERT_LOCKED(pmap);
-
- prot = VM_PROT_ALL;
- /*
- * Skip promoting kernel pages. This is justified by following:
- * 1. Kernel is already mapped using section mappings in each pmap
- * 2. Managed mappings within the kernel are not to be promoted anyway
- */
- if (pmap == pmap_kernel()) {
- pmap_section_p_failures++;
- CTR2(KTR_PMAP, "pmap_promote_section: failure for va %#x"
- " in pmap %p", va, pmap);
- return;
- }
- /* Do not attemp to promote vectors pages */
- if (L1_IDX(va) == L1_IDX(vector_page)) {
- pmap_section_p_failures++;
- CTR2(KTR_PMAP, "pmap_promote_section: failure for va %#x"
- " in pmap %p", va, pmap);
- return;
- }
- /*
- * Examine the first PTE in the specified l2_bucket. Abort if this PTE
- * is either invalid, unused, or does not map the first 4KB physical
- * page within 1MB page.
- */
- first_va = trunc_1mpage(va);
- l2b = pmap_get_l2_bucket(pmap, first_va);
- KASSERT(l2b != NULL, ("pmap_promote_section: trying to promote "
- "not existing l2 bucket"));
- firstptep = &l2b->l2b_kva[0];
-
- firstpte = *firstptep;
- if ((l2pte_pa(firstpte) & L1_S_OFFSET) != 0) {
- pmap_section_p_failures++;
- CTR2(KTR_PMAP, "pmap_promote_section: failure for va %#x"
- " in pmap %p", va, pmap);
- return;
- }
-
- if ((firstpte & (L2_S_PROTO | L2_S_REF)) != (L2_S_PROTO | L2_S_REF)) {
- pmap_section_p_failures++;
- CTR2(KTR_PMAP, "pmap_promote_section: failure for va %#x"
- " in pmap %p", va, pmap);
- return;
- }
- /*
- * ARM uses pv_entry to mark particular mapping WIRED so don't promote
- * unmanaged pages since it is impossible to determine, whether the
- * page is wired or not if there is no corresponding pv_entry.
- */
- m = PHYS_TO_VM_PAGE(l2pte_pa(firstpte));
- if (m && ((m->oflags & VPO_UNMANAGED) != 0)) {
- pmap_section_p_failures++;
- CTR2(KTR_PMAP, "pmap_promote_section: failure for va %#x"
- " in pmap %p", va, pmap);
- return;
- }
- first_pve = pmap_find_pv(&m->md, pmap, first_va);
- /*
- * PTE is modified only on write due to modified bit
- * emulation. If the entry is referenced and writable
- * then it is modified and we don't clear write enable.
- * Otherwise, writing is disabled in PTE anyway and
- * we just configure protections for the section mapping
- * that is going to be created.
- */
- if ((first_pve->pv_flags & PVF_WRITE) != 0) {
- if (!L2_S_WRITABLE(firstpte)) {
- first_pve->pv_flags &= ~PVF_WRITE;
- prot &= ~VM_PROT_WRITE;
- }
- } else
- prot &= ~VM_PROT_WRITE;
-
- if (!L2_S_EXECUTABLE(firstpte))
- prot &= ~VM_PROT_EXECUTE;
-
- /*
- * Examine each of the other PTEs in the specified l2_bucket.
- * Abort if this PTE maps an unexpected 4KB physical page or
- * does not have identical characteristics to the first PTE.
- */
- pa = l2pte_pa(firstpte) + ((L2_PTE_NUM_TOTAL - 1) * PAGE_SIZE);
- old_va = L2_NEXT_BUCKET(first_va) - PAGE_SIZE;
-
- for (pte = (firstptep + L2_PTE_NUM_TOTAL - 1); pte > firstptep; pte--) {
- oldpte = *pte;
- if (l2pte_pa(oldpte) != pa) {
- pmap_section_p_failures++;
- CTR2(KTR_PMAP, "pmap_promote_section: failure for "
- "va %#x in pmap %p", va, pmap);
- return;
- }
- if ((oldpte & L2_S_PROMOTE) != (firstpte & L2_S_PROMOTE)) {
- pmap_section_p_failures++;
- CTR2(KTR_PMAP, "pmap_promote_section: failure for "
- "va %#x in pmap %p", va, pmap);
- return;
- }
- oldm = PHYS_TO_VM_PAGE(l2pte_pa(oldpte));
- if (oldm && ((oldm->oflags & VPO_UNMANAGED) != 0)) {
- pmap_section_p_failures++;
- CTR2(KTR_PMAP, "pmap_promote_section: failure for "
- "va %#x in pmap %p", va, pmap);
- return;
- }
-
- pve = pmap_find_pv(&oldm->md, pmap, old_va);
- if (pve == NULL) {
- pmap_section_p_failures++;
- CTR2(KTR_PMAP, "pmap_promote_section: failure for "
- "va %#x old_va %x - no pve", va, old_va);
- return;
- }
-
- if (!L2_S_WRITABLE(oldpte) && (pve->pv_flags & PVF_WRITE))
- pve->pv_flags &= ~PVF_WRITE;
- if (pve->pv_flags != first_pve->pv_flags) {
- pmap_section_p_failures++;
- CTR2(KTR_PMAP, "pmap_promote_section: failure for "
- "va %#x in pmap %p", va, pmap);
- return;
- }
-
- old_va -= PAGE_SIZE;
- pa -= PAGE_SIZE;
- }
- /*
- * Promote the pv entries.
- */
- pmap_pv_promote_section(pmap, first_va, l2pte_pa(firstpte));
- /*
- * Map the superpage.
- */
- pmap_map_section(pmap, first_va, l2pte_pa(firstpte), prot, TRUE);
- /*
- * Invalidate all possible TLB mappings for small
- * pages within the newly created superpage.
- * Rely on the first PTE's attributes since they
- * have to be consistent across all of the base pages
- * within the superpage. If page is not executable it
- * is at least referenced.
- * The fastest way to do that is to invalidate whole
- * TLB at once instead of executing 256 CP15 TLB
- * invalidations by single entry. TLBs usually maintain
- * several dozen entries so loss of unrelated entries is
- * still a less agresive approach.
- */
- if (L2_S_EXECUTABLE(firstpte))
- cpu_tlb_flushID();
- else
- cpu_tlb_flushD();
- cpu_cpwait();
-
- pmap_section_promotions++;
- CTR2(KTR_PMAP, "pmap_promote_section: success for va %#x"
- " in pmap %p", first_va, pmap);
-}
-
-/*
- * Fills a l2_bucket with mappings to consecutive physical pages.
- */
-static void
-pmap_fill_l2b(struct l2_bucket *l2b, pt_entry_t newpte)
-{
- pt_entry_t *ptep;
- int i;
-
- for (i = 0; i < L2_PTE_NUM_TOTAL; i++) {
- ptep = &l2b->l2b_kva[i];
- *ptep = newpte;
- PTE_SYNC(ptep);
-
- newpte += PAGE_SIZE;
- }
-
- l2b->l2b_occupancy = L2_PTE_NUM_TOTAL;
-}
-
-/*
- * Tries to demote a 1MB section mapping. If demotion fails, the
- * 1MB section mapping is invalidated.
- */
-static boolean_t
-pmap_demote_section(pmap_t pmap, vm_offset_t va)
-{
- struct l2_bucket *l2b;
- struct pv_entry *l1pdpve;
- struct md_page *pvh;
- pd_entry_t *pl1pd, l1pd, newl1pd;
- pt_entry_t *firstptep, newpte;
- vm_offset_t pa;
- vm_page_t m;
-
- PMAP_ASSERT_LOCKED(pmap);
- /*
- * According to assumptions described in pmap_promote_section,
- * kernel is and always should be mapped using 1MB section mappings.
- * What more, managed kernel pages were not to be promoted.
- */
- KASSERT(pmap != pmap_kernel() && L1_IDX(va) != L1_IDX(vector_page),
- ("pmap_demote_section: forbidden section mapping"));
-
- va = trunc_1mpage(va);
- pl1pd = &pmap->pm_l1->l1_kva[L1_IDX(va)];
- l1pd = *pl1pd;
- KASSERT((l1pd & L1_TYPE_MASK) == L1_S_PROTO,
- ("pmap_demote_section: not section or invalid section"));
-
- pa = l1pd & L1_S_FRAME;
- m = PHYS_TO_VM_PAGE(pa);
- KASSERT((m != NULL && (m->oflags & VPO_UNMANAGED) == 0),
- ("pmap_demote_section: no vm_page for selected superpage or"
- "unmanaged"));
-
- pvh = pa_to_pvh(pa);
- l1pdpve = pmap_find_pv(pvh, pmap, va);
- KASSERT(l1pdpve != NULL, ("pmap_demote_section: no pv entry for "
- "managed page"));
-
- l2b = pmap_get_l2_bucket(pmap, va);
- if (l2b == NULL) {
- KASSERT((l1pdpve->pv_flags & PVF_WIRED) == 0,
- ("pmap_demote_section: No l2_bucket for wired mapping"));
- /*
- * Invalidate the 1MB section mapping and return
- * "failure" if the mapping was never accessed or the
- * allocation of the new l2_bucket fails.
- */
- if (!L1_S_REFERENCED(l1pd) ||
- (l2b = pmap_alloc_l2_bucket(pmap, va)) == NULL) {
- /* Unmap and invalidate superpage. */
- pmap_remove_section(pmap, trunc_1mpage(va));
- CTR2(KTR_PMAP, "pmap_demote_section: failure for "
- "va %#x in pmap %p", va, pmap);
- return (FALSE);
- }
- }
-
- /*
- * Now we should have corresponding l2_bucket available.
- * Let's process it to recreate 256 PTEs for each base page
- * within superpage.
- */
- newpte = pa | L1_S_DEMOTE(l1pd);
- if (m->md.pv_memattr != VM_MEMATTR_UNCACHEABLE)
- newpte |= pte_l2_s_cache_mode;
-
- /*
- * If the l2_bucket is new, initialize it.
- */
- if (l2b->l2b_occupancy == 0)
- pmap_fill_l2b(l2b, newpte);
- else {
- firstptep = &l2b->l2b_kva[0];
- KASSERT(l2pte_pa(*firstptep) == (pa),
- ("pmap_demote_section: firstpte and newpte map different "
- "physical addresses"));
- /*
- * If the mapping has changed attributes, update the page table
- * entries.
- */
- if ((*firstptep & L2_S_PROMOTE) != (L1_S_DEMOTE(l1pd)))
- pmap_fill_l2b(l2b, newpte);
- }
- /* Demote PV entry */
- pmap_pv_demote_section(pmap, va, pa);
-
- /* Now fix-up L1 */
- newl1pd = l2b->l2b_phys | L1_C_DOM(pmap->pm_domain) | L1_C_PROTO;
- *pl1pd = newl1pd;
- PTE_SYNC(pl1pd);
- /* Invalidate old TLB mapping */
- if (L1_S_EXECUTABLE(l1pd))
- cpu_tlb_flushID_SE(va);
- else if (L1_S_REFERENCED(l1pd))
- cpu_tlb_flushD_SE(va);
- cpu_cpwait();
-
- pmap_section_demotions++;
- CTR2(KTR_PMAP, "pmap_demote_section: success for va %#x"
- " in pmap %p", va, pmap);
- return (TRUE);
-}
-
-/***************************************************
- * page management routines.
- ***************************************************/
-
-/*
- * We are in a serious low memory condition. Resort to
- * drastic measures to free some pages so we can allocate
- * another pv entry chunk.
- */
-static vm_page_t
-pmap_pv_reclaim(pmap_t locked_pmap)
-{
- struct pch newtail;
- struct pv_chunk *pc;
- struct l2_bucket *l2b = NULL;
- pmap_t pmap;
- pd_entry_t *pl1pd;
- pt_entry_t *ptep;
- pv_entry_t pv;
- vm_offset_t va;
- vm_page_t free, m, m_pc;
- uint32_t inuse;
- int bit, field, freed, idx;
-
- PMAP_ASSERT_LOCKED(locked_pmap);
- pmap = NULL;
- free = m_pc = NULL;
- TAILQ_INIT(&newtail);
- while ((pc = TAILQ_FIRST(&pv_chunks)) != NULL && (pv_vafree == 0 ||
- free == NULL)) {
- TAILQ_REMOVE(&pv_chunks, pc, pc_lru);
- if (pmap != pc->pc_pmap) {
- if (pmap != NULL) {
- cpu_tlb_flushID();
- cpu_cpwait();
- if (pmap != locked_pmap)
- PMAP_UNLOCK(pmap);
- }
- pmap = pc->pc_pmap;
- /* Avoid deadlock and lock recursion. */
- if (pmap > locked_pmap)
- PMAP_LOCK(pmap);
- else if (pmap != locked_pmap && !PMAP_TRYLOCK(pmap)) {
- pmap = NULL;
- TAILQ_INSERT_TAIL(&newtail, pc, pc_lru);
- continue;
- }
- }
-
- /*
- * Destroy every non-wired, 4 KB page mapping in the chunk.
- */
- freed = 0;
- for (field = 0; field < _NPCM; field++) {
- for (inuse = ~pc->pc_map[field] & pc_freemask[field];
- inuse != 0; inuse &= ~(1UL << bit)) {
- bit = ffs(inuse) - 1;
- idx = field * sizeof(inuse) * NBBY + bit;
- pv = &pc->pc_pventry[idx];
- va = pv->pv_va;
-
- pl1pd = &pmap->pm_l1->l1_kva[L1_IDX(va)];
- if ((*pl1pd & L1_TYPE_MASK) == L1_S_PROTO)
- continue;
- if (pv->pv_flags & PVF_WIRED)
- continue;
-
- l2b = pmap_get_l2_bucket(pmap, va);
- KASSERT(l2b != NULL, ("No l2 bucket"));
- ptep = &l2b->l2b_kva[l2pte_index(va)];
- m = PHYS_TO_VM_PAGE(l2pte_pa(*ptep));
- KASSERT((vm_offset_t)m >= KERNBASE,
- ("Trying to access non-existent page "
- "va %x pte %x", va, *ptep));
- *ptep = 0;
- PTE_SYNC(ptep);
- TAILQ_REMOVE(&m->md.pv_list, pv, pv_list);
- if (TAILQ_EMPTY(&m->md.pv_list))
- vm_page_aflag_clear(m, PGA_WRITEABLE);
- pc->pc_map[field] |= 1UL << bit;
- freed++;
- }
- }
-
- if (freed == 0) {
- TAILQ_INSERT_TAIL(&newtail, pc, pc_lru);
- continue;
- }
- /* Every freed mapping is for a 4 KB page. */
- pmap->pm_stats.resident_count -= freed;
- PV_STAT(pv_entry_frees += freed);
- PV_STAT(pv_entry_spare += freed);
- pv_entry_count -= freed;
- TAILQ_REMOVE(&pmap->pm_pvchunk, pc, pc_list);
- for (field = 0; field < _NPCM; field++)
- if (pc->pc_map[field] != pc_freemask[field]) {
- TAILQ_INSERT_HEAD(&pmap->pm_pvchunk, pc,
- pc_list);
- TAILQ_INSERT_TAIL(&newtail, pc, pc_lru);
-
- /*
- * One freed pv entry in locked_pmap is
- * sufficient.
- */
- if (pmap == locked_pmap)
- goto out;
- break;
- }
- if (field == _NPCM) {
- PV_STAT(pv_entry_spare -= _NPCPV);
- PV_STAT(pc_chunk_count--);
- PV_STAT(pc_chunk_frees++);
- /* Entire chunk is free; return it. */
- m_pc = PHYS_TO_VM_PAGE(pmap_kextract((vm_offset_t)pc));
- pmap_qremove((vm_offset_t)pc, 1);
- pmap_ptelist_free(&pv_vafree, (vm_offset_t)pc);
- break;
- }
- }
-out:
- TAILQ_CONCAT(&pv_chunks, &newtail, pc_lru);
- if (pmap != NULL) {
- cpu_tlb_flushID();
- cpu_cpwait();
- if (pmap != locked_pmap)
- PMAP_UNLOCK(pmap);
- }
- return (m_pc);
-}
-
-/*
- * free the pv_entry back to the free list
- */
-static void
-pmap_free_pv_entry(pmap_t pmap, pv_entry_t pv)
-{
- struct pv_chunk *pc;
- int bit, field, idx;
-
- rw_assert(&pvh_global_lock, RA_WLOCKED);
- PMAP_ASSERT_LOCKED(pmap);
- PV_STAT(pv_entry_frees++);
- PV_STAT(pv_entry_spare++);
- pv_entry_count--;
- pc = pv_to_chunk(pv);
- idx = pv - &pc->pc_pventry[0];
- field = idx / (sizeof(u_long) * NBBY);
- bit = idx % (sizeof(u_long) * NBBY);
- pc->pc_map[field] |= 1ul << bit;
- for (idx = 0; idx < _NPCM; idx++)
- if (pc->pc_map[idx] != pc_freemask[idx]) {
- /*
- * 98% of the time, pc is already at the head of the
- * list. If it isn't already, move it to the head.
- */
- if (__predict_false(TAILQ_FIRST(&pmap->pm_pvchunk) !=
- pc)) {
- TAILQ_REMOVE(&pmap->pm_pvchunk, pc, pc_list);
- TAILQ_INSERT_HEAD(&pmap->pm_pvchunk, pc,
- pc_list);
- }
- return;
- }
- TAILQ_REMOVE(&pmap->pm_pvchunk, pc, pc_list);
- pmap_free_pv_chunk(pc);
-}
-
-static void
-pmap_free_pv_chunk(struct pv_chunk *pc)
-{
- vm_page_t m;
-
- TAILQ_REMOVE(&pv_chunks, pc, pc_lru);
- PV_STAT(pv_entry_spare -= _NPCPV);
- PV_STAT(pc_chunk_count--);
- PV_STAT(pc_chunk_frees++);
- /* entire chunk is free, return it */
- m = PHYS_TO_VM_PAGE(pmap_kextract((vm_offset_t)pc));
- pmap_qremove((vm_offset_t)pc, 1);
- vm_page_unwire(m, PQ_NONE);
- vm_page_free(m);
- pmap_ptelist_free(&pv_vafree, (vm_offset_t)pc);
-
-}
-
-static pv_entry_t
-pmap_get_pv_entry(pmap_t pmap, boolean_t try)
-{
- static const struct timeval printinterval = { 60, 0 };
- static struct timeval lastprint;
- struct pv_chunk *pc;
- pv_entry_t pv;
- vm_page_t m;
- int bit, field, idx;
-
- rw_assert(&pvh_global_lock, RA_WLOCKED);
- PMAP_ASSERT_LOCKED(pmap);
- PV_STAT(pv_entry_allocs++);
- pv_entry_count++;
-
- if (pv_entry_count > pv_entry_high_water)
- if (ratecheck(&lastprint, &printinterval))
- printf("%s: Approaching the limit on PV entries.\n",
- __func__);
-retry:
- pc = TAILQ_FIRST(&pmap->pm_pvchunk);
- if (pc != NULL) {
- for (field = 0; field < _NPCM; field++) {
- if (pc->pc_map[field]) {
- bit = ffs(pc->pc_map[field]) - 1;
- break;
- }
- }
- if (field < _NPCM) {
- idx = field * sizeof(pc->pc_map[field]) * NBBY + bit;
- pv = &pc->pc_pventry[idx];
- pc->pc_map[field] &= ~(1ul << bit);
- /* If this was the last item, move it to tail */
- for (field = 0; field < _NPCM; field++)
- if (pc->pc_map[field] != 0) {
- PV_STAT(pv_entry_spare--);
- return (pv); /* not full, return */
- }
- TAILQ_REMOVE(&pmap->pm_pvchunk, pc, pc_list);
- TAILQ_INSERT_TAIL(&pmap->pm_pvchunk, pc, pc_list);
- PV_STAT(pv_entry_spare--);
- return (pv);
- }
- }
- /*
- * Access to the ptelist "pv_vafree" is synchronized by the pvh
- * global lock. If "pv_vafree" is currently non-empty, it will
- * remain non-empty until pmap_ptelist_alloc() completes.
- */
- if (pv_vafree == 0 || (m = vm_page_alloc(NULL, 0, VM_ALLOC_NORMAL |
- VM_ALLOC_NOOBJ | VM_ALLOC_WIRED)) == NULL) {
- if (try) {
- pv_entry_count--;
- PV_STAT(pc_chunk_tryfail++);
- return (NULL);
- }
- m = pmap_pv_reclaim(pmap);
- if (m == NULL)
- goto retry;
- }
- PV_STAT(pc_chunk_count++);
- PV_STAT(pc_chunk_allocs++);
- pc = (struct pv_chunk *)pmap_ptelist_alloc(&pv_vafree);
- pmap_qenter((vm_offset_t)pc, &m, 1);
- pc->pc_pmap = pmap;
- pc->pc_map[0] = pc_freemask[0] & ~1ul; /* preallocated bit 0 */
- for (field = 1; field < _NPCM; field++)
- pc->pc_map[field] = pc_freemask[field];
- TAILQ_INSERT_TAIL(&pv_chunks, pc, pc_lru);
- pv = &pc->pc_pventry[0];
- TAILQ_INSERT_HEAD(&pmap->pm_pvchunk, pc, pc_list);
- PV_STAT(pv_entry_spare += _NPCPV - 1);
- return (pv);
-}
-
-/*
- * Remove the given range of addresses from the specified map.
- *
- * It is assumed that the start and end are properly
- * rounded to the page size.
- */
-#define PMAP_REMOVE_CLEAN_LIST_SIZE 3
-void
-pmap_remove(pmap_t pmap, vm_offset_t sva, vm_offset_t eva)
-{
- struct l2_bucket *l2b;
- vm_offset_t next_bucket;
- pd_entry_t l1pd;
- pt_entry_t *ptep;
- u_int total;
- u_int mappings, is_exec, is_refd;
- int flushall = 0;
-
-
- /*
- * we lock in the pmap => pv_head direction
- */
-
- rw_wlock(&pvh_global_lock);
- PMAP_LOCK(pmap);
- total = 0;
- while (sva < eva) {
- next_bucket = L2_NEXT_BUCKET(sva);
-
- /*
- * Check for large page.
- */
- l1pd = pmap->pm_l1->l1_kva[L1_IDX(sva)];
- if ((l1pd & L1_TYPE_MASK) == L1_S_PROTO) {
- KASSERT((l1pd & L1_S_DOM_MASK) !=
- L1_S_DOM(PMAP_DOMAIN_KERNEL), ("pmap_remove: "
- "Trying to remove kernel section mapping"));
- /*
- * Are we removing the entire large page? If not,
- * demote the mapping and fall through.
- */
- if (sva + L1_S_SIZE == next_bucket &&
- eva >= next_bucket) {
- pmap_remove_section(pmap, sva);
- sva = next_bucket;
- continue;
- } else if (!pmap_demote_section(pmap, sva)) {
- /* The large page mapping was destroyed. */
- sva = next_bucket;
- continue;
- }
- }
- /*
- * Do one L2 bucket's worth at a time.
- */
- if (next_bucket > eva)
- next_bucket = eva;
-
- l2b = pmap_get_l2_bucket(pmap, sva);
- if (l2b == NULL) {
- sva = next_bucket;
- continue;
- }
-
- ptep = &l2b->l2b_kva[l2pte_index(sva)];
- mappings = 0;
-
- while (sva < next_bucket) {
- struct vm_page *m;
- pt_entry_t pte;
- vm_paddr_t pa;
-
- pte = *ptep;
-
- if (pte == 0) {
- /*
- * Nothing here, move along
- */
- sva += PAGE_SIZE;
- ptep++;
- continue;
- }
-
- pmap->pm_stats.resident_count--;
- pa = l2pte_pa(pte);
- is_exec = 0;
- is_refd = 1;
-
- /*
- * Update flags. In a number of circumstances,
- * we could cluster a lot of these and do a
- * number of sequential pages in one go.
- */
- if ((m = PHYS_TO_VM_PAGE(pa)) != NULL) {
- struct pv_entry *pve;
-
- pve = pmap_remove_pv(m, pmap, sva);
- if (pve) {
- is_exec = PTE_BEEN_EXECD(pte);
- is_refd = PTE_BEEN_REFD(pte);
- pmap_free_pv_entry(pmap, pve);
- }
- }
-
- *ptep = 0;
- PTE_SYNC(ptep);
- if (pmap_is_current(pmap)) {
- total++;
- if (total < PMAP_REMOVE_CLEAN_LIST_SIZE) {
- if (is_exec)
- cpu_tlb_flushID_SE(sva);
- else if (is_refd)
- cpu_tlb_flushD_SE(sva);
- } else if (total == PMAP_REMOVE_CLEAN_LIST_SIZE)
- flushall = 1;
- }
-
- sva += PAGE_SIZE;
- ptep++;
- mappings++;
- }
-
- pmap_free_l2_bucket(pmap, l2b, mappings);
- }
-
- rw_wunlock(&pvh_global_lock);
- if (flushall)
- cpu_tlb_flushID();
- cpu_cpwait();
-
- PMAP_UNLOCK(pmap);
-}
-
-/*
- * pmap_zero_page()
- *
- * Zero a given physical page by mapping it at a page hook point.
- * In doing the zero page op, the page we zero is mapped cachable, as with
- * StrongARM accesses to non-cached pages are non-burst making writing
- * _any_ bulk data very slow.
- */
-static void
-pmap_zero_page_gen(vm_page_t m, int off, int size)
-{
- struct czpages *czp;
-
- KASSERT(TAILQ_EMPTY(&m->md.pv_list),
- ("pmap_zero_page_gen: page has mappings"));
-
- vm_paddr_t phys = VM_PAGE_TO_PHYS(m);
-
- sched_pin();
- czp = &cpu_czpages[PCPU_GET(cpuid)];
- mtx_lock(&czp->lock);
-
- /*
- * Hook in the page, zero it.
- */
- *czp->dstptep = L2_S_PROTO | phys | pte_l2_s_cache_mode | L2_S_REF;
- pmap_set_prot(czp->dstptep, VM_PROT_WRITE, 0);
- PTE_SYNC(czp->dstptep);
- cpu_tlb_flushD_SE(czp->dstva);
- cpu_cpwait();
-
- if (off || size != PAGE_SIZE)
- bzero((void *)(czp->dstva + off), size);
- else
- bzero_page(czp->dstva);
-
- /*
- * Although aliasing is not possible, if we use temporary mappings with
- * memory that will be mapped later as non-cached or with write-through
- * caches, we might end up overwriting it when calling wbinv_all. So
- * make sure caches are clean after the operation.
- */
- cpu_idcache_wbinv_range(czp->dstva, size);
- pmap_l2cache_wbinv_range(czp->dstva, phys, size);
-
- mtx_unlock(&czp->lock);
- sched_unpin();
-}
-
-/*
- * pmap_zero_page zeros the specified hardware page by mapping
- * the page into KVM and using bzero to clear its contents.
- */
-void
-pmap_zero_page(vm_page_t m)
-{
- pmap_zero_page_gen(m, 0, PAGE_SIZE);
-}
-
-
-/*
- * pmap_zero_page_area zeros the specified hardware page by mapping
- * the page into KVM and using bzero to clear its contents.
- *
- * off and size may not cover an area beyond a single hardware page.
- */
-void
-pmap_zero_page_area(vm_page_t m, int off, int size)
-{
-
- pmap_zero_page_gen(m, off, size);
-}
-
-
-/*
- * pmap_zero_page_idle zeros the specified hardware page by mapping
- * the page into KVM and using bzero to clear its contents. This
- * is intended to be called from the vm_pagezero process only and
- * outside of Giant.
- */
-void
-pmap_zero_page_idle(vm_page_t m)
-{
-
- pmap_zero_page(m);
-}
-
-/*
- * pmap_copy_page copies the specified (machine independent)
- * page by mapping the page into virtual memory and using
- * bcopy to copy the page, one machine dependent page at a
- * time.
- */
-
-/*
- * pmap_copy_page()
- *
- * Copy one physical page into another, by mapping the pages into
- * hook points. The same comment regarding cachability as in
- * pmap_zero_page also applies here.
- */
-void
-pmap_copy_page_generic(vm_paddr_t src, vm_paddr_t dst)
-{
- struct czpages *czp;
-
- sched_pin();
- czp = &cpu_czpages[PCPU_GET(cpuid)];
- mtx_lock(&czp->lock);
-
- /*
- * Map the pages into the page hook points, copy them, and purge the
- * cache for the appropriate page.
- */
- *czp->srcptep = L2_S_PROTO | src | pte_l2_s_cache_mode | L2_S_REF;
- pmap_set_prot(czp->srcptep, VM_PROT_READ, 0);
- PTE_SYNC(czp->srcptep);
- cpu_tlb_flushD_SE(czp->srcva);
- *czp->dstptep = L2_S_PROTO | dst | pte_l2_s_cache_mode | L2_S_REF;
- pmap_set_prot(czp->dstptep, VM_PROT_READ | VM_PROT_WRITE, 0);
- PTE_SYNC(czp->dstptep);
- cpu_tlb_flushD_SE(czp->dstva);
- cpu_cpwait();
-
- bcopy_page(czp->srcva, czp->dstva);
-
- /*
- * Although aliasing is not possible, if we use temporary mappings with
- * memory that will be mapped later as non-cached or with write-through
- * caches, we might end up overwriting it when calling wbinv_all. So
- * make sure caches are clean after the operation.
- */
- cpu_idcache_wbinv_range(czp->dstva, PAGE_SIZE);
- pmap_l2cache_wbinv_range(czp->dstva, dst, PAGE_SIZE);
-
- mtx_unlock(&czp->lock);
- sched_unpin();
-}
-
-int unmapped_buf_allowed = 1;
-
-void
-pmap_copy_pages(vm_page_t ma[], vm_offset_t a_offset, vm_page_t mb[],
- vm_offset_t b_offset, int xfersize)
-{
- vm_page_t a_pg, b_pg;
- vm_offset_t a_pg_offset, b_pg_offset;
- int cnt;
- struct czpages *czp;
-
- sched_pin();
- czp = &cpu_czpages[PCPU_GET(cpuid)];
- mtx_lock(&czp->lock);
-
- while (xfersize > 0) {
- a_pg = ma[a_offset >> PAGE_SHIFT];
- a_pg_offset = a_offset & PAGE_MASK;
- cnt = min(xfersize, PAGE_SIZE - a_pg_offset);
- b_pg = mb[b_offset >> PAGE_SHIFT];
- b_pg_offset = b_offset & PAGE_MASK;
- cnt = min(cnt, PAGE_SIZE - b_pg_offset);
- *czp->srcptep = L2_S_PROTO | VM_PAGE_TO_PHYS(a_pg) |
- pte_l2_s_cache_mode | L2_S_REF;
- pmap_set_prot(czp->srcptep, VM_PROT_READ, 0);
- PTE_SYNC(czp->srcptep);
- cpu_tlb_flushD_SE(czp->srcva);
- *czp->dstptep = L2_S_PROTO | VM_PAGE_TO_PHYS(b_pg) |
- pte_l2_s_cache_mode | L2_S_REF;
- pmap_set_prot(czp->dstptep, VM_PROT_READ | VM_PROT_WRITE, 0);
- PTE_SYNC(czp->dstptep);
- cpu_tlb_flushD_SE(czp->dstva);
- cpu_cpwait();
- bcopy((char *)czp->srcva + a_pg_offset, (char *)czp->dstva + b_pg_offset,
- cnt);
- cpu_idcache_wbinv_range(czp->dstva + b_pg_offset, cnt);
- pmap_l2cache_wbinv_range(czp->dstva + b_pg_offset,
- VM_PAGE_TO_PHYS(b_pg) + b_pg_offset, cnt);
- xfersize -= cnt;
- a_offset += cnt;
- b_offset += cnt;
- }
-
- mtx_unlock(&czp->lock);
- sched_unpin();
-}
-
-void
-pmap_copy_page(vm_page_t src, vm_page_t dst)
-{
-
- if (_arm_memcpy && PAGE_SIZE >= _min_memcpy_size &&
- _arm_memcpy((void *)VM_PAGE_TO_PHYS(dst),
- (void *)VM_PAGE_TO_PHYS(src), PAGE_SIZE, IS_PHYSICAL) == 0)
- return;
-
- pmap_copy_page_generic(VM_PAGE_TO_PHYS(src), VM_PAGE_TO_PHYS(dst));
-}
-
-vm_offset_t
-pmap_quick_enter_page(vm_page_t m)
-{
- pt_entry_t *qmap_pte;
- vm_offset_t qmap_addr;
-
- critical_enter();
-
- qmap_addr = PCPU_GET(qmap_addr);
- qmap_pte = PCPU_GET(qmap_pte);
-
- KASSERT(*qmap_pte == 0, ("pmap_quick_enter_page: PTE busy"));
-
- *qmap_pte = L2_S_PROTO | VM_PAGE_TO_PHYS(m) | L2_S_REF;
- if (m->md.pv_memattr != VM_MEMATTR_UNCACHEABLE)
- *qmap_pte |= pte_l2_s_cache_mode;
- pmap_set_prot(qmap_pte, VM_PROT_READ | VM_PROT_WRITE, 0);
- PTE_SYNC(qmap_pte);
- cpu_tlb_flushD_SE(qmap_addr);
- cpu_cpwait();
-
- return (qmap_addr);
-}
-
-void
-pmap_quick_remove_page(vm_offset_t addr)
-{
- pt_entry_t *qmap_pte;
-
- qmap_pte = PCPU_GET(qmap_pte);
-
- KASSERT(addr == PCPU_GET(qmap_addr),
- ("pmap_quick_remove_page: invalid address"));
- KASSERT(*qmap_pte != 0,
- ("pmap_quick_remove_page: PTE not in use"));
-
- cpu_idcache_wbinv_range(addr, PAGE_SIZE);
- pmap_l2cache_wbinv_range(addr, *qmap_pte & L2_S_FRAME, PAGE_SIZE);
- *qmap_pte = 0;
- PTE_SYNC(qmap_pte);
- critical_exit();
-}
-
-/*
- * this routine returns true if a physical page resides
- * in the given pmap.
- */
-boolean_t
-pmap_page_exists_quick(pmap_t pmap, vm_page_t m)
-{
- struct md_page *pvh;
- pv_entry_t pv;
- int loops = 0;
- boolean_t rv;
-
- KASSERT((m->oflags & VPO_UNMANAGED) == 0,
- ("pmap_page_exists_quick: page %p is not managed", m));
- rv = FALSE;
- rw_wlock(&pvh_global_lock);
- TAILQ_FOREACH(pv, &m->md.pv_list, pv_list) {
- if (PV_PMAP(pv) == pmap) {
- rv = TRUE;
- break;
- }
- loops++;
- if (loops >= 16)
- break;
- }
- if (!rv && loops < 16 && (m->flags & PG_FICTITIOUS) == 0) {
- pvh = pa_to_pvh(VM_PAGE_TO_PHYS(m));
- TAILQ_FOREACH(pv, &pvh->pv_list, pv_list) {
- if (PV_PMAP(pv) == pmap) {
- rv = TRUE;
- break;
- }
- loops++;
- if (loops >= 16)
- break;
- }
- }
- rw_wunlock(&pvh_global_lock);
- return (rv);
-}
-
-/*
- * pmap_page_wired_mappings:
- *
- * Return the number of managed mappings to the given physical page
- * that are wired.
- */
-int
-pmap_page_wired_mappings(vm_page_t m)
-{
- int count;
-
- count = 0;
- if ((m->oflags & VPO_UNMANAGED) != 0)
- return (count);
- rw_wlock(&pvh_global_lock);
- count = pmap_pvh_wired_mappings(&m->md, count);
- if ((m->flags & PG_FICTITIOUS) == 0) {
- count = pmap_pvh_wired_mappings(pa_to_pvh(VM_PAGE_TO_PHYS(m)),
- count);
- }
- rw_wunlock(&pvh_global_lock);
- return (count);
-}
-
-/*
- * pmap_pvh_wired_mappings:
- *
- * Return the updated number "count" of managed mappings that are wired.
- */
-static int
-pmap_pvh_wired_mappings(struct md_page *pvh, int count)
-{
- pv_entry_t pv;
-
- rw_assert(&pvh_global_lock, RA_WLOCKED);
- TAILQ_FOREACH(pv, &pvh->pv_list, pv_list) {
- if ((pv->pv_flags & PVF_WIRED) != 0)
- count++;
- }
- return (count);
-}
-
-/*
- * Returns TRUE if any of the given mappings were referenced and FALSE
- * otherwise. Both page and section mappings are supported.
- */
-static boolean_t
-pmap_is_referenced_pvh(struct md_page *pvh)
-{
- struct l2_bucket *l2b;
- pv_entry_t pv;
- pd_entry_t *pl1pd;
- pt_entry_t *ptep;
- pmap_t pmap;
- boolean_t rv;
-
- rw_assert(&pvh_global_lock, RA_WLOCKED);
- rv = FALSE;
- TAILQ_FOREACH(pv, &pvh->pv_list, pv_list) {
- pmap = PV_PMAP(pv);
- PMAP_LOCK(pmap);
- pl1pd = &pmap->pm_l1->l1_kva[L1_IDX(pv->pv_va)];
- if ((*pl1pd & L1_TYPE_MASK) == L1_S_PROTO)
- rv = L1_S_REFERENCED(*pl1pd);
- else {
- l2b = pmap_get_l2_bucket(pmap, pv->pv_va);
- ptep = &l2b->l2b_kva[l2pte_index(pv->pv_va)];
- rv = L2_S_REFERENCED(*ptep);
- }
- PMAP_UNLOCK(pmap);
- if (rv)
- break;
- }
- return (rv);
-}
-
-/*
- * pmap_is_referenced:
- *
- * Return whether or not the specified physical page was referenced
- * in any physical maps.
- */
-boolean_t
-pmap_is_referenced(vm_page_t m)
-{
- boolean_t rv;
-
- KASSERT((m->oflags & VPO_UNMANAGED) == 0,
- ("pmap_is_referenced: page %p is not managed", m));
- rw_wlock(&pvh_global_lock);
- rv = pmap_is_referenced_pvh(&m->md) ||
- ((m->flags & PG_FICTITIOUS) == 0 &&
- pmap_is_referenced_pvh(pa_to_pvh(VM_PAGE_TO_PHYS(m))));
- rw_wunlock(&pvh_global_lock);
- return (rv);
-}
-
-/*
- * pmap_ts_referenced:
- *
- * Return the count of reference bits for a page, clearing all of them.
- */
-int
-pmap_ts_referenced(vm_page_t m)
-{
-
- KASSERT((m->oflags & VPO_UNMANAGED) == 0,
- ("pmap_ts_referenced: page %p is not managed", m));
- return (pmap_clearbit(m, PVF_REF));
-}
-
-/*
- * Returns TRUE if any of the given mappings were used to modify
- * physical memory. Otherwise, returns FALSE. Both page and 1MB section
- * mappings are supported.
- */
-static boolean_t
-pmap_is_modified_pvh(struct md_page *pvh)
-{
- pd_entry_t *pl1pd;
- struct l2_bucket *l2b;
- pv_entry_t pv;
- pt_entry_t *ptep;
- pmap_t pmap;
- boolean_t rv;
-
- rw_assert(&pvh_global_lock, RA_WLOCKED);
- rv = FALSE;
-
- TAILQ_FOREACH(pv, &pvh->pv_list, pv_list) {
- pmap = PV_PMAP(pv);
- PMAP_LOCK(pmap);
- pl1pd = &pmap->pm_l1->l1_kva[L1_IDX(pv->pv_va)];
- if ((*pl1pd & L1_TYPE_MASK) == L1_S_PROTO)
- rv = L1_S_WRITABLE(*pl1pd);
- else {
- l2b = pmap_get_l2_bucket(pmap, pv->pv_va);
- ptep = &l2b->l2b_kva[l2pte_index(pv->pv_va)];
- rv = L2_S_WRITABLE(*ptep);
- }
- PMAP_UNLOCK(pmap);
- if (rv)
- break;
- }
-
- return (rv);
-}
-
-boolean_t
-pmap_is_modified(vm_page_t m)
-{
- boolean_t rv;
-
- KASSERT((m->oflags & VPO_UNMANAGED) == 0,
- ("pmap_is_modified: page %p is not managed", m));
- /*
- * If the page is not exclusive busied, then PGA_WRITEABLE cannot be
- * concurrently set while the object is locked. Thus, if PGA_WRITEABLE
- * is clear, no PTEs can have APX cleared.
- */
- VM_OBJECT_ASSERT_WLOCKED(m->object);
- if (!vm_page_xbusied(m) && (m->aflags & PGA_WRITEABLE) == 0)
- return (FALSE);
- rw_wlock(&pvh_global_lock);
- rv = pmap_is_modified_pvh(&m->md) ||
- ((m->flags & PG_FICTITIOUS) == 0 &&
- pmap_is_modified_pvh(pa_to_pvh(VM_PAGE_TO_PHYS(m))));
- rw_wunlock(&pvh_global_lock);
- return (rv);
-}
-
-/*
- * Apply the given advice to the specified range of addresses within the
- * given pmap. Depending on the advice, clear the referenced and/or
- * modified flags in each mapping.
- */
-void
-pmap_advise(pmap_t pmap, vm_offset_t sva, vm_offset_t eva, int advice)
-{
- struct l2_bucket *l2b;
- struct pv_entry *pve;
- pd_entry_t l1pd;
- pt_entry_t *ptep, opte, pte;
- vm_offset_t next_bucket;
- vm_page_t m;
-
- if (advice != MADV_DONTNEED && advice != MADV_FREE)
- return;
- rw_wlock(&pvh_global_lock);
- PMAP_LOCK(pmap);
- for (; sva < eva; sva = next_bucket) {
- next_bucket = L2_NEXT_BUCKET(sva);
- if (next_bucket < sva)
- next_bucket = eva;
- l1pd = pmap->pm_l1->l1_kva[L1_IDX(sva)];
- if ((l1pd & L1_TYPE_MASK) == L1_S_PROTO) {
- if (pmap == pmap_kernel())
- continue;
- if (!pmap_demote_section(pmap, sva)) {
- /*
- * The large page mapping was destroyed.
- */
- continue;
- }
- /*
- * Unless the page mappings are wired, remove the
- * mapping to a single page so that a subsequent
- * access may repromote. Since the underlying
- * l2_bucket is fully populated, this removal
- * never frees an entire l2_bucket.
- */
- l2b = pmap_get_l2_bucket(pmap, sva);
- KASSERT(l2b != NULL,
- ("pmap_advise: no l2 bucket for "
- "va 0x%#x, pmap 0x%p", sva, pmap));
- ptep = &l2b->l2b_kva[l2pte_index(sva)];
- opte = *ptep;
- m = PHYS_TO_VM_PAGE(l2pte_pa(*ptep));
- KASSERT(m != NULL,
- ("pmap_advise: no vm_page for demoted superpage"));
- pve = pmap_find_pv(&m->md, pmap, sva);
- KASSERT(pve != NULL,
- ("pmap_advise: no PV entry for managed mapping"));
- if ((pve->pv_flags & PVF_WIRED) == 0) {
- pmap_free_l2_bucket(pmap, l2b, 1);
- pve = pmap_remove_pv(m, pmap, sva);
- pmap_free_pv_entry(pmap, pve);
- *ptep = 0;
- PTE_SYNC(ptep);
- if (pmap_is_current(pmap)) {
- if (PTE_BEEN_EXECD(opte))
- cpu_tlb_flushID_SE(sva);
- else if (PTE_BEEN_REFD(opte))
- cpu_tlb_flushD_SE(sva);
- }
- }
- }
- if (next_bucket > eva)
- next_bucket = eva;
- l2b = pmap_get_l2_bucket(pmap, sva);
- if (l2b == NULL)
- continue;
- for (ptep = &l2b->l2b_kva[l2pte_index(sva)];
- sva != next_bucket; ptep++, sva += PAGE_SIZE) {
- opte = pte = *ptep;
- if ((opte & L2_S_PROTO) == 0)
- continue;
- m = PHYS_TO_VM_PAGE(l2pte_pa(opte));
- if (m == NULL || (m->oflags & VPO_UNMANAGED) != 0)
- continue;
- else if (L2_S_WRITABLE(opte)) {
- if (advice == MADV_DONTNEED) {
- /*
- * Don't need to mark the page
- * dirty as it was already marked as
- * such in pmap_fault_fixup() or
- * pmap_enter_locked().
- * Just clear the state.
- */
- } else
- pte |= L2_APX;
-
- pte &= ~L2_S_REF;
- *ptep = pte;
- PTE_SYNC(ptep);
- } else if (L2_S_REFERENCED(opte)) {
- pte &= ~L2_S_REF;
- *ptep = pte;
- PTE_SYNC(ptep);
- } else
- continue;
- if (pmap_is_current(pmap)) {
- if (PTE_BEEN_EXECD(opte))
- cpu_tlb_flushID_SE(sva);
- else if (PTE_BEEN_REFD(opte))
- cpu_tlb_flushD_SE(sva);
- }
- }
- }
- cpu_cpwait();
- rw_wunlock(&pvh_global_lock);
- PMAP_UNLOCK(pmap);
-}
-
-/*
- * Clear the modify bits on the specified physical page.
- */
-void
-pmap_clear_modify(vm_page_t m)
-{
-
- KASSERT((m->oflags & VPO_UNMANAGED) == 0,
- ("pmap_clear_modify: page %p is not managed", m));
- VM_OBJECT_ASSERT_WLOCKED(m->object);
- KASSERT(!vm_page_xbusied(m),
- ("pmap_clear_modify: page %p is exclusive busied", m));
-
- /*
- * If the page is not PGA_WRITEABLE, then no mappings can be modified.
- * If the object containing the page is locked and the page is not
- * exclusive busied, then PGA_WRITEABLE cannot be concurrently set.
- */
- if ((m->aflags & PGA_WRITEABLE) == 0)
- return;
- if (pmap_is_modified(m))
- pmap_clearbit(m, PVF_MOD);
-}
-
-
-/*
- * Clear the write and modified bits in each of the given page's mappings.
- */
-void
-pmap_remove_write(vm_page_t m)
-{
- KASSERT((m->oflags & VPO_UNMANAGED) == 0,
- ("pmap_remove_write: page %p is not managed", m));
-
- /*
- * If the page is not exclusive busied, then PGA_WRITEABLE cannot be
- * set by another thread while the object is locked. Thus,
- * if PGA_WRITEABLE is clear, no page table entries need updating.
- */
- VM_OBJECT_ASSERT_WLOCKED(m->object);
- if (vm_page_xbusied(m) || (m->aflags & PGA_WRITEABLE) != 0)
- pmap_clearbit(m, PVF_WRITE);
-}
-
-
-/*
- * perform the pmap work for mincore
- */
-int
-pmap_mincore(pmap_t pmap, vm_offset_t addr, vm_paddr_t *locked_pa)
-{
- struct l2_bucket *l2b;
- pd_entry_t *pl1pd, l1pd;
- pt_entry_t *ptep, pte;
- vm_paddr_t pa;
- vm_page_t m;
- int val;
- boolean_t managed;
-
- PMAP_LOCK(pmap);
-retry:
- pl1pd = &pmap->pm_l1->l1_kva[L1_IDX(addr)];
- l1pd = *pl1pd;
- if ((l1pd & L1_TYPE_MASK) == L1_S_PROTO) {
- pa = (l1pd & L1_S_FRAME);
- val = MINCORE_SUPER | MINCORE_INCORE;
- if (L1_S_WRITABLE(l1pd))
- val |= MINCORE_MODIFIED | MINCORE_MODIFIED_OTHER;
- managed = FALSE;
- m = PHYS_TO_VM_PAGE(pa);
- if (m != NULL && (m->oflags & VPO_UNMANAGED) == 0)
- managed = TRUE;
- if (managed) {
- if (L1_S_REFERENCED(l1pd))
- val |= MINCORE_REFERENCED |
- MINCORE_REFERENCED_OTHER;
- }
- } else {
- l2b = pmap_get_l2_bucket(pmap, addr);
- if (l2b == NULL) {
- val = 0;
- goto out;
- }
- ptep = &l2b->l2b_kva[l2pte_index(addr)];
- pte = *ptep;
- if (!l2pte_valid(pte)) {
- val = 0;
- goto out;
- }
- val = MINCORE_INCORE;
- if (L2_S_WRITABLE(pte))
- val |= MINCORE_MODIFIED | MINCORE_MODIFIED_OTHER;
- managed = FALSE;
- pa = l2pte_pa(pte);
- m = PHYS_TO_VM_PAGE(pa);
- if (m != NULL && (m->oflags & VPO_UNMANAGED) == 0)
- managed = TRUE;
- if (managed) {
- if (L2_S_REFERENCED(pte))
- val |= MINCORE_REFERENCED |
- MINCORE_REFERENCED_OTHER;
- }
- }
- if ((val & (MINCORE_MODIFIED_OTHER | MINCORE_REFERENCED_OTHER)) !=
- (MINCORE_MODIFIED_OTHER | MINCORE_REFERENCED_OTHER) && managed) {
- /* Ensure that "PHYS_TO_VM_PAGE(pa)->object" doesn't change. */
- if (vm_page_pa_tryrelock(pmap, pa, locked_pa))
- goto retry;
- } else
-out:
- PA_UNLOCK_COND(*locked_pa);
- PMAP_UNLOCK(pmap);
- return (val);
-}
-
-void
-pmap_sync_icache(pmap_t pmap, vm_offset_t va, vm_size_t sz)
-{
-}
-
-/*
- * Increase the starting virtual address of the given mapping if a
- * different alignment might result in more superpage mappings.
- */
-void
-pmap_align_superpage(vm_object_t object, vm_ooffset_t offset,
- vm_offset_t *addr, vm_size_t size)
-{
- vm_offset_t superpage_offset;
-
- if (size < NBPDR)
- return;
- if (object != NULL && (object->flags & OBJ_COLORED) != 0)
- offset += ptoa(object->pg_color);
- superpage_offset = offset & PDRMASK;
- if (size - ((NBPDR - superpage_offset) & PDRMASK) < NBPDR ||
- (*addr & PDRMASK) == superpage_offset)
- return;
- if ((*addr & PDRMASK) < superpage_offset)
- *addr = (*addr & ~PDRMASK) + superpage_offset;
- else
- *addr = ((*addr + PDRMASK) & ~PDRMASK) + superpage_offset;
-}
-
-/*
- * pmap_map_section:
- *
- * Create a single section mapping.
- */
-void
-pmap_map_section(pmap_t pmap, vm_offset_t va, vm_offset_t pa, vm_prot_t prot,
- boolean_t ref)
-{
- pd_entry_t *pl1pd, l1pd;
- pd_entry_t fl;
-
- KASSERT(((va | pa) & L1_S_OFFSET) == 0,
- ("Not a valid section mapping"));
-
- fl = pte_l1_s_cache_mode;
-
- pl1pd = &pmap->pm_l1->l1_kva[L1_IDX(va)];
- l1pd = L1_S_PROTO | pa | L1_S_PROT(PTE_USER, prot) | fl |
- L1_S_DOM(pmap->pm_domain);
-
- /* Mark page referenced if this section is a result of a promotion. */
- if (ref == TRUE)
- l1pd |= L1_S_REF;
-#ifdef SMP
- l1pd |= L1_SHARED;
-#endif
- *pl1pd = l1pd;
- PTE_SYNC(pl1pd);
-}
-
-/*
- * pmap_link_l2pt:
- *
- * Link the L2 page table specified by l2pv.pv_pa into the L1
- * page table at the slot for "va".
- */
-void
-pmap_link_l2pt(vm_offset_t l1pt, vm_offset_t va, struct pv_addr *l2pv)
-{
- pd_entry_t *pde = (pd_entry_t *) l1pt, proto;
- u_int slot = va >> L1_S_SHIFT;
-
- proto = L1_S_DOM(PMAP_DOMAIN_KERNEL) | L1_C_PROTO;
-
-#ifdef VERBOSE_INIT_ARM
- printf("pmap_link_l2pt: pa=0x%x va=0x%x\n", l2pv->pv_pa, l2pv->pv_va);
-#endif
-
- pde[slot + 0] = proto | (l2pv->pv_pa + 0x000);
- PTE_SYNC(&pde[slot]);
-
- SLIST_INSERT_HEAD(&kernel_pt_list, l2pv, pv_list);
-
-}
-
-/*
- * pmap_map_entry
- *
- * Create a single page mapping.
- */
-void
-pmap_map_entry(vm_offset_t l1pt, vm_offset_t va, vm_offset_t pa, int prot,
- int cache)
-{
- pd_entry_t *pde = (pd_entry_t *) l1pt;
- pt_entry_t fl;
- pt_entry_t *ptep;
-
- KASSERT(((va | pa) & PAGE_MASK) == 0, ("ouin"));
-
- fl = l2s_mem_types[cache];
-
- if ((pde[va >> L1_S_SHIFT] & L1_TYPE_MASK) != L1_TYPE_C)
- panic("pmap_map_entry: no L2 table for VA 0x%08x", va);
-
- ptep = (pt_entry_t *)kernel_pt_lookup(pde[L1_IDX(va)] & L1_C_ADDR_MASK);
-
- if (ptep == NULL)
- panic("pmap_map_entry: can't find L2 table for VA 0x%08x", va);
-
- ptep[l2pte_index(va)] = L2_S_PROTO | pa | fl | L2_S_REF;
- pmap_set_prot(&ptep[l2pte_index(va)], prot, 0);
- PTE_SYNC(&ptep[l2pte_index(va)]);
-}
-
-/*
- * pmap_map_chunk:
- *
- * Map a chunk of memory using the most efficient mappings
- * possible (section. large page, small page) into the
- * provided L1 and L2 tables at the specified virtual address.
- */
-vm_size_t
-pmap_map_chunk(vm_offset_t l1pt, vm_offset_t va, vm_offset_t pa,
- vm_size_t size, int prot, int type)
-{
- pd_entry_t *pde = (pd_entry_t *) l1pt;
- pt_entry_t *ptep, f1, f2s, f2l;
- vm_size_t resid;
- int i;
-
- resid = (size + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
-
- if (l1pt == 0)
- panic("pmap_map_chunk: no L1 table provided");
-
-#ifdef VERBOSE_INIT_ARM
- printf("pmap_map_chunk: pa=0x%x va=0x%x size=0x%x resid=0x%x "
- "prot=0x%x type=%d\n", pa, va, size, resid, prot, type);
-#endif
-
- f1 = l1_mem_types[type];
- f2l = l2l_mem_types[type];
- f2s = l2s_mem_types[type];
-
- size = resid;
-
- while (resid > 0) {
- /* See if we can use a section mapping. */
- if (L1_S_MAPPABLE_P(va, pa, resid)) {
-#ifdef VERBOSE_INIT_ARM
- printf("S");
-#endif
- pde[va >> L1_S_SHIFT] = L1_S_PROTO | pa |
- L1_S_PROT(PTE_KERNEL, prot | VM_PROT_EXECUTE) |
- f1 | L1_S_DOM(PMAP_DOMAIN_KERNEL) | L1_S_REF;
- PTE_SYNC(&pde[va >> L1_S_SHIFT]);
- va += L1_S_SIZE;
- pa += L1_S_SIZE;
- resid -= L1_S_SIZE;
- continue;
- }
-
- /*
- * Ok, we're going to use an L2 table. Make sure
- * one is actually in the corresponding L1 slot
- * for the current VA.
- */
- if ((pde[va >> L1_S_SHIFT] & L1_TYPE_MASK) != L1_TYPE_C)
- panic("pmap_map_chunk: no L2 table for VA 0x%08x", va);
-
- ptep = (pt_entry_t *) kernel_pt_lookup(
- pde[L1_IDX(va)] & L1_C_ADDR_MASK);
- if (ptep == NULL)
- panic("pmap_map_chunk: can't find L2 table for VA"
- "0x%08x", va);
- /* See if we can use a L2 large page mapping. */
- if (L2_L_MAPPABLE_P(va, pa, resid)) {
-#ifdef VERBOSE_INIT_ARM
- printf("L");
-#endif
- for (i = 0; i < 16; i++) {
- ptep[l2pte_index(va) + i] =
- L2_L_PROTO | pa |
- L2_L_PROT(PTE_KERNEL, prot) | f2l;
- PTE_SYNC(&ptep[l2pte_index(va) + i]);
- }
- va += L2_L_SIZE;
- pa += L2_L_SIZE;
- resid -= L2_L_SIZE;
- continue;
- }
-
- /* Use a small page mapping. */
-#ifdef VERBOSE_INIT_ARM
- printf("P");
-#endif
- ptep[l2pte_index(va)] = L2_S_PROTO | pa | f2s | L2_S_REF;
- pmap_set_prot(&ptep[l2pte_index(va)], prot, 0);
- PTE_SYNC(&ptep[l2pte_index(va)]);
- va += PAGE_SIZE;
- pa += PAGE_SIZE;
- resid -= PAGE_SIZE;
- }
-#ifdef VERBOSE_INIT_ARM
- printf("\n");
-#endif
- return (size);
-
-}
-
-void
-pmap_page_set_memattr(vm_page_t m, vm_memattr_t ma)
-{
- /*
- * Remember the memattr in a field that gets used to set the appropriate
- * bits in the PTEs as mappings are established.
- */
- m->md.pv_memattr = ma;
-
- /*
- * It appears that this function can only be called before any mappings
- * for the page are established on ARM. If this ever changes, this code
- * will need to walk the pv_list and make each of the existing mappings
- * uncacheable, being careful to sync caches and PTEs (and maybe
- * invalidate TLB?) for any current mapping it modifies.
- */
- if (TAILQ_FIRST(&m->md.pv_list) != NULL)
- panic("Can't change memattr on page with existing mappings");
-}
diff --git a/sys/arm/arm/swtch.S b/sys/arm/arm/swtch.S
index ee63685..d7571ec 100644
--- a/sys/arm/arm/swtch.S
+++ b/sys/arm/arm/swtch.S
@@ -114,7 +114,7 @@ __FBSDID("$FreeBSD$");
.word _C_LABEL(blocked_lock)
-#ifndef ARM_NEW_PMAP
+#if __ARM_ARCH < 6
#define DOMAIN_CLIENT 0x01
@@ -418,7 +418,7 @@ ENTRY(cpu_switch)
END(cpu_switch)
-#else /* !ARM_NEW_PMAP */
+#else /* __ARM_ARCH < 6 */
#include <machine/sysreg.h>
ENTRY(cpu_context_switch) /* QQQ: What about macro instead of function? */
@@ -789,7 +789,7 @@ sw4_panic_str:
END(cpu_switch)
-#endif /* !ARM_NEW_PMAP */
+#endif /* __ARM_ARCH < 6 */
ENTRY(savectx)
stmfd sp!, {lr}
diff --git a/sys/arm/arm/trap-v6.c b/sys/arm/arm/trap-v6.c
index 6d80151..adc29c6 100644
--- a/sys/arm/arm/trap-v6.c
+++ b/sys/arm/arm/trap-v6.c
@@ -334,13 +334,11 @@ abort_handler(struct trapframe *tf, int prefetch)
* they are not from KVA space. Thus, no action is needed here.
*/
-#ifdef ARM_NEW_PMAP
rv = pmap_fault(PCPU_GET(curpmap), far, fsr, idx, usermode);
if (rv == KERN_SUCCESS)
return;
if (rv == KERN_INVALID_ADDRESS)
goto nogo;
-#endif
/*
* Now, when we handled imprecise and debug aborts, the rest of
* aborts should be really related to mapping.
@@ -488,13 +486,6 @@ abort_handler(struct trapframe *tf, int prefetch)
last_fault_code = fsr;
#endif
-#ifndef ARM_NEW_PMAP
- if (pmap_fault_fixup(vmspace_pmap(td->td_proc->p_vmspace), va, ftype,
- usermode)) {
- goto out;
- }
-#endif
-
#ifdef INVARIANTS
onfault = pcb->pcb_onfault;
pcb->pcb_onfault = NULL;
diff --git a/sys/arm/conf/std.armv6 b/sys/arm/conf/std.armv6
index 8e5df24..35f60a3 100644
--- a/sys/arm/conf/std.armv6
+++ b/sys/arm/conf/std.armv6
@@ -37,8 +37,6 @@ options KBD_INSTALL_CDEV # install a CDEV entry in /dev
options FREEBSD_BOOT_LOADER # Process metadata passed from loader(8)
options VFP # Enable floating point hardware support
-options ARM_NEW_PMAP # Use new pmap code.
-
# DTrace support
options KDTRACE_HOOKS # Kernel DTrace hooks
options DDB_CTF # all architectures - kernel ELF linker loads CTF data
diff --git a/sys/arm/include/machdep.h b/sys/arm/include/machdep.h
index fdf59be..36c2f44 100644
--- a/sys/arm/include/machdep.h
+++ b/sys/arm/include/machdep.h
@@ -4,8 +4,10 @@
#ifndef _MACHDEP_BOOT_MACHDEP_H_
#define _MACHDEP_BOOT_MACHDEP_H_
+#include <machine/acle-compat.h>
+
/* Structs that need to be initialised by initarm */
-#ifdef ARM_NEW_PMAP
+#if __ARM_ARCH >= 6
extern vm_offset_t irqstack;
extern vm_offset_t undstack;
extern vm_offset_t abtstack;
diff --git a/sys/arm/include/pmap.h b/sys/arm/include/pmap.h
index a0b0d94..dc7fd38 100644
--- a/sys/arm/include/pmap.h
+++ b/sys/arm/include/pmap.h
@@ -46,9 +46,11 @@
*
* $FreeBSD$
*/
-#ifdef ARM_NEW_PMAP
+ #include <machine/acle-compat.h>
+
+#if __ARM_ARCH >= 6
#include <machine/pmap-v6.h>
-#else /* ARM_NEW_PMAP */
+#else /* __ARM_ARCH >= 6 */
#ifndef _MACHINE_PMAP_H_
#define _MACHINE_PMAP_H_
@@ -704,4 +706,4 @@ extern vm_paddr_t dump_avail[];
#endif /* !LOCORE */
#endif /* !_MACHINE_PMAP_H_ */
-#endif /* !ARM_NEW_PMAP */
+#endif /* __ARM_ARCH >= 6 */
diff --git a/sys/arm/include/pte.h b/sys/arm/include/pte.h
index 42e26ab..8c26aab 100644
--- a/sys/arm/include/pte.h
+++ b/sys/arm/include/pte.h
@@ -33,9 +33,11 @@
*
* $FreeBSD$
*/
-#ifdef ARM_NEW_PMAP
+#include <machine/acle-compat.h>
+
+#if __ARM_ARCH >= 6
#include <machine/pte-v6.h>
-#else /* ARM_NEW_PMAP */
+#else /* __ARM_ARCH >= 6 */
#ifndef _MACHINE_PTE_H_
#define _MACHINE_PTE_H_
@@ -356,6 +358,6 @@ typedef pt_entry_t pt2_entry_t; /* compatibility with v6 */
* 1 X 1 1 1 Y Y WT Y Y
*/
#endif /* !_MACHINE_PTE_H_ */
-#endif /* !ARM_NEW_PMAP */
+#endif /* __ARM_ARCH >= 6 */
/* End of pte.h */
diff --git a/sys/arm/include/sf_buf.h b/sys/arm/include/sf_buf.h
index eba8488..5228864 100644
--- a/sys/arm/include/sf_buf.h
+++ b/sys/arm/include/sf_buf.h
@@ -29,11 +29,13 @@
#ifndef _MACHINE_SF_BUF_H_
#define _MACHINE_SF_BUF_H_
+#include <machine/acle-compat.h>
+
static inline void
sf_buf_map(struct sf_buf *sf, int flags)
{
-#ifdef ARM_NEW_PMAP
+#if __ARM_ARCH >= 6
pmap_qenter(sf->kva, &(sf->m), 1);
#else
pmap_kenter(sf->kva, VM_PAGE_TO_PHYS(sf->m));
@@ -44,7 +46,7 @@ static inline int
sf_buf_unmap(struct sf_buf *sf)
{
-#ifdef ARM_NEW_PMAP
+#if __ARM_ARCH >= 6
pmap_qremove(sf->kva, 1);
#else
pmap_kremove(sf->kva);
diff --git a/sys/arm/include/vm.h b/sys/arm/include/vm.h
index 8fb230e..70a4ab9 100644
--- a/sys/arm/include/vm.h
+++ b/sys/arm/include/vm.h
@@ -29,7 +29,9 @@
#ifndef _MACHINE_VM_H_
#define _MACHINE_VM_H_
-#ifdef ARM_NEW_PMAP
+#include <machine/acle-compat.h>
+
+#if __ARM_ARCH >= 6
#include <machine/pte-v6.h>
#define VM_MEMATTR_WB_WA ((vm_memattr_t)PTE2_ATTR_WB_WA)
@@ -40,9 +42,11 @@
#define VM_MEMATTR_DEFAULT VM_MEMATTR_WB_WA
#define VM_MEMATTR_UNCACHEABLE VM_MEMATTR_SO /* misused by DMA */
+#ifdef _KERNEL
+/* Don't export aliased VM_MEMATTR to userland */
#define VM_MEMATTR_WRITE_COMBINING VM_MEMATTR_WT /* for DRM */
#define VM_MEMATTR_WRITE_BACK VM_MEMATTR_WB_WA /* for DRM */
-
+#endif
#else
/* Memory attribute configuration. */
#define VM_MEMATTR_DEFAULT 0
diff --git a/sys/conf/files.arm b/sys/conf/files.arm
index 33bdd94..67b94df 100644
--- a/sys/conf/files.arm
+++ b/sys/conf/files.arm
@@ -64,8 +64,7 @@ arm/arm/pl310.c optional pl310
arm/arm/platform.c optional platform
arm/arm/platform_if.m optional platform
arm/arm/pmap.c optional !armv6
-arm/arm/pmap-v6.c optional armv6 !arm_new_pmap
-arm/arm/pmap-v6-new.c optional armv6 arm_new_pmap
+arm/arm/pmap-v6-new.c optional armv6
arm/arm/pmu.c optional pmu | fdt hwpmc
arm/arm/sc_machdep.c optional sc
arm/arm/setcpsr.S standard
diff --git a/sys/conf/options.arm b/sys/conf/options.arm
index 8720ac2..ef66413 100644
--- a/sys/conf/options.arm
+++ b/sys/conf/options.arm
@@ -5,7 +5,6 @@ ARM_INTRNG opt_global.h
ARM_KERN_DIRECTMAP opt_vm.h
ARM_L2_PIPT opt_global.h
ARM_MANY_BOARD opt_global.h
-ARM_NEW_PMAP opt_global.h
NKPT2PG opt_pmap.h
ARM_WANT_TP_ADDRESS opt_global.h
COUNTS_PER_SEC opt_timer.h
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