diff options
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/arm/arm/genassym.c | 6 | ||||
| -rw-r--r-- | sys/arm/arm/locore-v6.S | 22 | ||||
| -rw-r--r-- | sys/arm/arm/machdep.c | 12 | ||||
| -rw-r--r-- | sys/arm/arm/mem.c | 3 | ||||
| -rw-r--r-- | sys/arm/arm/mp_machdep.c | 9 | ||||
| -rw-r--r-- | sys/arm/arm/pmap-v6.c | 5452 | ||||
| -rw-r--r-- | sys/arm/arm/swtch.S | 6 | ||||
| -rw-r--r-- | sys/arm/arm/trap-v6.c | 9 | ||||
| -rw-r--r-- | sys/arm/conf/std.armv6 | 2 | ||||
| -rw-r--r-- | sys/arm/include/machdep.h | 4 | ||||
| -rw-r--r-- | sys/arm/include/pmap.h | 8 | ||||
| -rw-r--r-- | sys/arm/include/pte.h | 8 | ||||
| -rw-r--r-- | sys/arm/include/sf_buf.h | 6 | ||||
| -rw-r--r-- | sys/arm/include/vm.h | 8 | ||||
| -rw-r--r-- | sys/conf/files.arm | 3 | ||||
| -rw-r--r-- | sys/conf/options.arm | 1 |
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 |
