diff options
| -rw-r--r-- | arch/hexagon/include/asm/hexagon_vm.h | 281 | ||||
| -rw-r--r-- | arch/hexagon/include/asm/vm_mmu.h | 111 | ||||
| -rw-r--r-- | arch/hexagon/kernel/vm_entry.S | 269 | ||||
| -rw-r--r-- | arch/hexagon/kernel/vm_events.c | 101 | ||||
| -rw-r--r-- | arch/hexagon/kernel/vm_init_segtable.S | 442 | ||||
| -rw-r--r-- | arch/hexagon/kernel/vm_ops.S | 102 | ||||
| -rw-r--r-- | arch/hexagon/kernel/vm_switch.S | 95 | ||||
| -rw-r--r-- | arch/hexagon/kernel/vm_vectors.S | 48 |
8 files changed, 1449 insertions, 0 deletions
diff --git a/arch/hexagon/include/asm/hexagon_vm.h b/arch/hexagon/include/asm/hexagon_vm.h new file mode 100644 index 0000000..182cb9d --- /dev/null +++ b/arch/hexagon/include/asm/hexagon_vm.h @@ -0,0 +1,281 @@ +/* + * Declarations for to Hexagon Virtal Machine. + * + * Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +#ifndef ASM_HEXAGON_VM_H +#define ASM_HEXAGON_VM_H + +/* + * In principle, a Linux kernel for the VM could + * selectively define the virtual instructions + * as inline assembler macros, but for a first pass, + * we'll use subroutines for both the VM and the native + * kernels. It's costing a subroutine call/return, + * but it makes for a single set of entry points + * for tracing/debugging. + */ + +/* + * Lets make this stuff visible only if configured, + * so we can unconditionally include the file. + */ + +#ifndef __ASSEMBLY__ + +enum VM_CACHE_OPS { + ickill, + dckill, + l2kill, + dccleaninva, + icinva, + idsync, + fetch_cfg +}; + +enum VM_INT_OPS { + nop, + globen, + globdis, + locen, + locdis, + affinity, + get, + peek, + status, + post, + clear +}; + +extern void _K_VM_event_vector(void); + +void __vmrte(void); +long __vmsetvec(void *); +long __vmsetie(long); +long __vmgetie(void); +long __vmintop(enum VM_INT_OPS, long, long, long, long); +long __vmclrmap(void *, unsigned long); +long __vmnewmap(void *); +long __vmcache(enum VM_CACHE_OPS op, unsigned long addr, unsigned long len); +unsigned long long __vmgettime(void); +long __vmsettime(unsigned long long); +long __vmstart(void *, void *); +void __vmstop(void); +long __vmwait(void); +void __vmyield(void); +long __vmvpid(void); + +static inline long __vmcache_ickill(void) +{ + return __vmcache(ickill, 0, 0); +} + +static inline long __vmcache_dckill(void) +{ + return __vmcache(dckill, 0, 0); +} + +static inline long __vmcache_l2kill(void) +{ + return __vmcache(l2kill, 0, 0); +} + +static inline long __vmcache_dccleaninva(unsigned long addr, unsigned long len) +{ + return __vmcache(dccleaninva, addr, len); +} + +static inline long __vmcache_icinva(unsigned long addr, unsigned long len) +{ + return __vmcache(icinva, addr, len); +} + +static inline long __vmcache_idsync(unsigned long addr, + unsigned long len) +{ + return __vmcache(idsync, addr, len); +} + +static inline long __vmcache_fetch_cfg(unsigned long val) +{ + return __vmcache(fetch_cfg, val, 0); +} + +/* interrupt operations */ + +static inline long __vmintop_nop(void) +{ + return __vmintop(nop, 0, 0, 0, 0); +} + +static inline long __vmintop_globen(long i) +{ + return __vmintop(globen, i, 0, 0, 0); +} + +static inline long __vmintop_globdis(long i) +{ + return __vmintop(globdis, i, 0, 0, 0); +} + +static inline long __vmintop_locen(long i) +{ + return __vmintop(locen, i, 0, 0, 0); +} + +static inline long __vmintop_locdis(long i) +{ + return __vmintop(locdis, i, 0, 0, 0); +} + +static inline long __vmintop_affinity(long i, long cpu) +{ + return __vmintop(locdis, i, cpu, 0, 0); +} + +static inline long __vmintop_get(void) +{ + return __vmintop(get, 0, 0, 0, 0); +} + +static inline long __vmintop_peek(void) +{ + return __vmintop(peek, 0, 0, 0, 0); +} + +static inline long __vmintop_status(long i) +{ + return __vmintop(status, i, 0, 0, 0); +} + +static inline long __vmintop_post(long i) +{ + return __vmintop(post, i, 0, 0, 0); +} + +static inline long __vmintop_clear(long i) +{ + return __vmintop(clear, i, 0, 0, 0); +} + +#else /* Only assembly code should reference these */ + +#define HVM_TRAP1_VMRTE 1 +#define HVM_TRAP1_VMSETVEC 2 +#define HVM_TRAP1_VMSETIE 3 +#define HVM_TRAP1_VMGETIE 4 +#define HVM_TRAP1_VMINTOP 5 +#define HVM_TRAP1_VMCLRMAP 10 +#define HVM_TRAP1_VMNEWMAP 11 +#define HVM_TRAP1_FORMERLY_VMWIRE 12 +#define HVM_TRAP1_VMCACHE 13 +#define HVM_TRAP1_VMGETTIME 14 +#define HVM_TRAP1_VMSETTIME 15 +#define HVM_TRAP1_VMWAIT 16 +#define HVM_TRAP1_VMYIELD 17 +#define HVM_TRAP1_VMSTART 18 +#define HVM_TRAP1_VMSTOP 19 +#define HVM_TRAP1_VMVPID 20 +#define HVM_TRAP1_VMSETREGS 21 +#define HVM_TRAP1_VMGETREGS 22 + +#endif /* __ASSEMBLY__ */ + +/* + * Constants for virtual instruction parameters and return values + */ + +/* vmsetie arguments */ + +#define VM_INT_DISABLE 0 +#define VM_INT_ENABLE 1 + +/* vmsetimask arguments */ + +#define VM_INT_UNMASK 0 +#define VM_INT_MASK 1 + +#define VM_NEWMAP_TYPE_LINEAR 0 +#define VM_NEWMAP_TYPE_PGTABLES 1 + + +/* + * Event Record definitions useful to both C and Assembler + */ + +/* VMEST Layout */ + +#define HVM_VMEST_UM_SFT 31 +#define HVM_VMEST_UM_MSK 1 +#define HVM_VMEST_IE_SFT 30 +#define HVM_VMEST_IE_MSK 1 +#define HVM_VMEST_EVENTNUM_SFT 16 +#define HVM_VMEST_EVENTNUM_MSK 0xff +#define HVM_VMEST_CAUSE_SFT 0 +#define HVM_VMEST_CAUSE_MSK 0xffff + +/* + * The initial program gets to find a system environment descriptor + * on its stack when it begins exection. The first word is a version + * code to indicate what is there. Zero means nothing more. + */ + +#define HEXAGON_VM_SED_NULL 0 + +/* + * Event numbers for vector binding + */ + +#define HVM_EV_RESET 0 +#define HVM_EV_MACHCHECK 1 +#define HVM_EV_GENEX 2 +#define HVM_EV_TRAP 8 +#define HVM_EV_INTR 15 +/* These shoud be nuked as soon as we know the VM is up to spec v0.1.1 */ +#define HVM_EV_INTR_0 16 +#define HVM_MAX_INTR 240 + +/* + * Cause values for General Exception + */ + +#define HVM_GE_C_BUS 0x01 +#define HVM_GE_C_XPROT 0x11 +#define HVM_GE_C_XUSER 0x14 +#define HVM_GE_C_INVI 0x15 +#define HVM_GE_C_PRIVI 0x1B +#define HVM_GE_C_XMAL 0x1C +#define HVM_GE_C_RMAL 0x20 +#define HVM_GE_C_WMAL 0x21 +#define HVM_GE_C_RPROT 0x22 +#define HVM_GE_C_WPROT 0x23 +#define HVM_GE_C_RUSER 0x24 +#define HVM_GE_C_WUSER 0x25 +#define HVM_GE_C_CACHE 0x28 + +/* + * Cause codes for Machine Check + */ + +#define HVM_MCHK_C_DOWN 0x00 +#define HVM_MCHK_C_BADSP 0x01 +#define HVM_MCHK_C_BADEX 0x02 +#define HVM_MCHK_C_BADPT 0x03 +#define HVM_MCHK_C_REGWR 0x29 + +#endif diff --git a/arch/hexagon/include/asm/vm_mmu.h b/arch/hexagon/include/asm/vm_mmu.h new file mode 100644 index 0000000..580462d --- /dev/null +++ b/arch/hexagon/include/asm/vm_mmu.h @@ -0,0 +1,111 @@ +/* + * Hexagon VM page table entry definitions + * + * Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +#ifndef _ASM_VM_MMU_H +#define _ASM_VM_MMU_H + +/* + * Shift, mask, and other constants for the Hexagon Virtual Machine + * page tables. + * + * Virtual machine MMU allows first-level entries to either be + * single-level lookup PTEs for very large pages, or PDEs pointing + * to second-level PTEs for smaller pages. If PTE is single-level, + * the least significant bits cannot be used as software bits to encode + * virtual memory subsystem information about the page, and that state + * must be maintained in some parallel data structure. + */ + +/* S or Page Size field in PDE */ +#define __HVM_PDE_S (0x7 << 0) +#define __HVM_PDE_S_4KB 0 +#define __HVM_PDE_S_16KB 1 +#define __HVM_PDE_S_64KB 2 +#define __HVM_PDE_S_256KB 3 +#define __HVM_PDE_S_1MB 4 +#define __HVM_PDE_S_4MB 5 +#define __HVM_PDE_S_16MB 6 +#define __HVM_PDE_S_INVALID 7 + +/* Masks for L2 page table pointer, as function of page size */ +#define __HVM_PDE_PTMASK_4KB 0xfffff000 +#define __HVM_PDE_PTMASK_16KB 0xfffffc00 +#define __HVM_PDE_PTMASK_64KB 0xffffff00 +#define __HVM_PDE_PTMASK_256KB 0xffffffc0 +#define __HVM_PDE_PTMASK_1MB 0xfffffff0 + +/* + * Virtual Machine PTE Bits/Fields + */ +#define __HVM_PTE_T (1<<4) +#define __HVM_PTE_U (1<<5) +#define __HVM_PTE_C (0x7<<6) +#define __HVM_PTE_CVAL(pte) (((pte) & __HVM_PTE_C) >> 6) +#define __HVM_PTE_R (1<<9) +#define __HVM_PTE_W (1<<10) +#define __HVM_PTE_X (1<<11) + +/* + * Cache Attributes, to be shifted as necessary for virtual/physical PTEs + */ + +#define __HEXAGON_C_WB 0x0 /* Write-back, no L2 */ +#define __HEXAGON_C_WT 0x1 /* Write-through, no L2 */ +#define __HEXAGON_C_DEV 0x4 /* Device register space */ +#define __HEXAGON_C_WT_L2 0x5 /* Write-through, with L2 */ +/* this really should be #if CONFIG_HEXAGON_ARCH = 2 but that's not defined */ +#if defined(CONFIG_HEXAGON_COMET) || defined(CONFIG_QDSP6_ST1) +#define __HEXAGON_C_UNC __HEXAGON_C_DEV +#else +#define __HEXAGON_C_UNC 0x6 /* Uncached memory */ +#endif +#define __HEXAGON_C_WB_L2 0x7 /* Write-back, with L2 */ + +/* + * This can be overriden, but we're defaulting to the most aggressive + * cache policy, the better to find bugs sooner. + */ + +#define CACHE_DEFAULT __HEXAGON_C_WB_L2 + +/* Masks for physical page address, as a function of page size */ + +#define __HVM_PTE_PGMASK_4KB 0xfffff000 +#define __HVM_PTE_PGMASK_16KB 0xffffc000 +#define __HVM_PTE_PGMASK_64KB 0xffff0000 +#define __HVM_PTE_PGMASK_256KB 0xfffc0000 +#define __HVM_PTE_PGMASK_1MB 0xfff00000 + +/* Masks for single-level large page lookups */ + +#define __HVM_PTE_PGMASK_4MB 0xffc00000 +#define __HVM_PTE_PGMASK_16MB 0xff000000 + +/* + * "Big kernel page mappings" (see vm_init_segtable.S) + * are currently 16MB + */ + +#define BIG_KERNEL_PAGE_SHIFT 24 +#define BIG_KERNEL_PAGE_SIZE (1 << BIG_KERNEL_PAGE_SHIFT) + + + +#endif /* _ASM_VM_MMU_H */ diff --git a/arch/hexagon/kernel/vm_entry.S b/arch/hexagon/kernel/vm_entry.S new file mode 100644 index 0000000..5b99066 --- /dev/null +++ b/arch/hexagon/kernel/vm_entry.S @@ -0,0 +1,269 @@ +/* + * Event entry/exit for Hexagon + * + * Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +#include <asm/asm-offsets.h> /* assembly-safer versions of C defines */ +#include <asm/mem-layout.h> /* sigh, except for page_offset */ +#include <asm/hexagon_vm.h> +#include <asm/thread_info.h> + +/* + * Entry into guest-mode Linux under Hexagon Virtual Machine. + * Stack pointer points to event record - build pt_regs on top of it, + * set up a plausible C stack frame, and dispatch to the C handler. + * On return, do vmrte virtual instruction with SP where we started. + * + * VM Spec 0.5 uses a trap to fetch HVM record now. + */ + +/* + * Save full register state, while setting up thread_info struct + * pointer derived from kernel stack pointer in THREADINFO_REG + * register, putting prior thread_info.regs pointer in a callee-save + * register (R24, which had better not ever be assigned to THREADINFO_REG), + * and updating thread_info.regs to point to current stack frame, + * so as to support nested events in kernel mode. + * + * As this is common code, we set the pt_regs system call number + * to -1 for all events. It will be replaced with the system call + * number in the case where we decode a system call (trap0(#1)). + */ + +#define save_pt_regs()\ + memd(R0 + #_PT_R3130) = R31:30; \ + { memw(R0 + #_PT_R2928) = R28; \ + R31 = memw(R0 + #_PT_ER_VMPSP); }\ + { memw(R0 + #(_PT_R2928 + 4)) = R31; \ + R31 = ugp; } \ + { memd(R0 + #_PT_R2726) = R27:26; \ + R30 = gp ; } \ + memd(R0 + #_PT_R2524) = R25:24; \ + memd(R0 + #_PT_R2322) = R23:22; \ + memd(R0 + #_PT_R2120) = R21:20; \ + memd(R0 + #_PT_R1918) = R19:18; \ + memd(R0 + #_PT_R1716) = R17:16; \ + memd(R0 + #_PT_R1514) = R15:14; \ + memd(R0 + #_PT_R1312) = R13:12; \ + { memd(R0 + #_PT_R1110) = R11:10; \ + R15 = lc0; } \ + { memd(R0 + #_PT_R0908) = R9:8; \ + R14 = sa0; } \ + { memd(R0 + #_PT_R0706) = R7:6; \ + R13 = lc1; } \ + { memd(R0 + #_PT_R0504) = R5:4; \ + R12 = sa1; } \ + { memd(R0 + #_PT_UGPGP) = R31:30; \ + R11 = m1; \ + R2.H = #HI(_THREAD_SIZE); } \ + { memd(R0 + #_PT_LC0SA0) = R15:14; \ + R10 = m0; \ + R2.L = #LO(_THREAD_SIZE); } \ + { memd(R0 + #_PT_LC1SA1) = R13:12; \ + R15 = p3:0; \ + R2 = neg(R2); } \ + { memd(R0 + #_PT_M1M0) = R11:10; \ + R14 = usr; \ + R2 = and(R0,R2); } \ + { memd(R0 + #_PT_PREDSUSR) = R15:14; \ + THREADINFO_REG = R2; } \ + { r24 = memw(THREADINFO_REG + #_THREAD_INFO_PT_REGS); \ + memw(THREADINFO_REG + #_THREAD_INFO_PT_REGS) = R0; \ + R2 = #-1; } \ + { memw(R0 + #_PT_SYSCALL_NR) = R2; \ + R30 = #0; } + +/* + * Restore registers and thread_info.regs state. THREADINFO_REG + * is assumed to still be sane, and R24 to have been correctly + * preserved. Don't restore R29 (SP) until later. + */ + +#define restore_pt_regs() \ + { memw(THREADINFO_REG + #_THREAD_INFO_PT_REGS) = R24; \ + R15:14 = memd(R0 + #_PT_PREDSUSR); } \ + { R11:10 = memd(R0 + #_PT_M1M0); \ + p3:0 = R15; } \ + { R13:12 = memd(R0 + #_PT_LC1SA1); \ + usr = R14; } \ + { R15:14 = memd(R0 + #_PT_LC0SA0); \ + m1 = R11; } \ + { R3:2 = memd(R0 + #_PT_R0302); \ + m0 = R10; } \ + { R5:4 = memd(R0 + #_PT_R0504); \ + lc1 = R13; } \ + { R7:6 = memd(R0 + #_PT_R0706); \ + sa1 = R12; } \ + { R9:8 = memd(R0 + #_PT_R0908); \ + lc0 = R15; } \ + { R11:10 = memd(R0 + #_PT_R1110); \ + sa0 = R14; } \ + { R13:12 = memd(R0 + #_PT_R1312); \ + R15:14 = memd(R0 + #_PT_R1514); } \ + { R17:16 = memd(R0 + #_PT_R1716); \ + R19:18 = memd(R0 + #_PT_R1918); } \ + { R21:20 = memd(R0 + #_PT_R2120); \ + R23:22 = memd(R0 + #_PT_R2322); } \ + { R25:24 = memd(R0 + #_PT_R2524); \ + R27:26 = memd(R0 + #_PT_R2726); } \ + R31:30 = memd(R0 + #_PT_UGPGP); \ + { R28 = memw(R0 + #_PT_R2928); \ + ugp = R31; } \ + { R31:30 = memd(R0 + #_PT_R3130); \ + gp = R30; } + + /* + * Clears off enough space for the rest of pt_regs; evrec is a part + * of pt_regs in HVM mode. Save R0/R1, set handler's address in R1. + * R0 is the address of pt_regs and is the parameter to save_pt_regs. + */ + +/* + * Since the HVM isn't automagically pushing the EVREC onto the stack anymore, + * we'll subract the entire size out and then fill it in ourselves. + * Need to save off R0, R1, R2, R3 immediately. + */ + +#define vm_event_entry(CHandler) \ + { \ + R29 = add(R29, #-(_PT_REGS_SIZE)); \ + memd(R29 + #(_PT_R0100 + -_PT_REGS_SIZE)) = R1:0; \ + } \ + { \ + memd(R29 +#_PT_R0302) = R3:2; \ + } \ + trap1(#HVM_TRAP1_VMGETREGS); \ + { \ + memd(R29 + #_PT_ER_VMEL) = R1:0; \ + R0 = R29; \ + R1.L = #LO(CHandler); \ + } \ + { \ + memd(R29 + #_PT_ER_VMPSP) = R3:2; \ + R1.H = #HI(CHandler); \ + jump event_dispatch; \ + } + +.text + /* + * Do bulk save/restore in one place. + * Adds a jump to dispatch latency, but + * saves hundreds of bytes. + */ + +event_dispatch: + save_pt_regs() + callr r1 + + /* + * If we were in kernel mode, we don't need to check scheduler + * or signals if CONFIG_PREEMPT is not set. If set, then it has + * to jump to a need_resched kind of block. + * BTW, CONFIG_PREEMPT is not supported yet. + */ + +#ifdef CONFIG_PREEMPT + R0 = #VM_INT_DISABLE + trap1(#HVM_TRAP1_VMSETIE) +#endif + + /* "Nested control path" -- if the previous mode was kernel */ + R0 = memw(R29 + #_PT_ER_VMEST); + P0 = tstbit(R0, #HVM_VMEST_UM_SFT); + if !P0 jump restore_all; + /* + * Returning from system call, normally coming back from user mode + */ +return_from_syscall: + /* Disable interrupts while checking TIF */ + R0 = #VM_INT_DISABLE + trap1(#HVM_TRAP1_VMSETIE) + + /* + * Coming back from the C-world, our thread info pointer + * should be in the designated register (usually R19) + */ + R1.L = #LO(_TIF_ALLWORK_MASK) + { + R1.H = #HI(_TIF_ALLWORK_MASK); + R0 = memw(THREADINFO_REG + #_THREAD_INFO_FLAGS); + } + + /* + * Compare against the "return to userspace" _TIF_WORK_MASK + */ + R1 = and(R1,R0); + { P0 = cmp.eq(R1,#0); if (!P0.new) jump:t work_pending;} + jump restore_all; /* we're outta here! */ + +work_pending: + { + P0 = tstbit(R1, #TIF_NEED_RESCHED); + if (!P0.new) jump:nt work_notifysig; + } + call schedule + jump return_from_syscall; /* check for more work */ + +work_notifysig: + /* this is the part that's kind of fuzzy. */ + R1 = and(R0, #(_TIF_SIGPENDING | _TIF_NOTIFY_RESUME)); + P0 = cmp.eq(R1, #0); + if P0 jump restore_all + R1 = R0; /* unsigned long thread_info_flags */ + R0 = R29; /* regs should still be at top of stack */ + call do_notify_resume + +restore_all: + /* Disable interrupts, if they weren't already, before reg restore. */ + R0 = #VM_INT_DISABLE + trap1(#HVM_TRAP1_VMSETIE) + + /* do the setregs here for VM 0.5 */ + /* R29 here should already be pointing at pt_regs */ + R1:0 = memd(R29 + #_PT_ER_VMEL); + R3:2 = memd(R29 + #_PT_ER_VMPSP); + trap1(#HVM_TRAP1_VMSETREGS); + + R0 = R29 + restore_pt_regs() + R1:0 = memd(R29 + #_PT_R0100); + R29 = add(R29, #_PT_REGS_SIZE); + trap1(#HVM_TRAP1_VMRTE) + /* Notreached */ + + .globl _K_enter_genex +_K_enter_genex: + vm_event_entry(do_genex) + + .globl _K_enter_interrupt +_K_enter_interrupt: + vm_event_entry(arch_do_IRQ) + + .globl _K_enter_trap0 +_K_enter_trap0: + vm_event_entry(do_trap0) + + .globl _K_enter_machcheck +_K_enter_machcheck: + vm_event_entry(do_machcheck) + + + .globl ret_from_fork +ret_from_fork: + call schedule_tail + jump return_from_syscall diff --git a/arch/hexagon/kernel/vm_events.c b/arch/hexagon/kernel/vm_events.c new file mode 100644 index 0000000..986a081e --- /dev/null +++ b/arch/hexagon/kernel/vm_events.c @@ -0,0 +1,101 @@ +/* + * Mostly IRQ support for Hexagon + * + * Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +#include <linux/kernel.h> +#include <asm/registers.h> +#include <linux/irq.h> +#include <linux/hardirq.h> +#include <asm/system.h> + +/* + * show_regs - print pt_regs structure + * @regs: pointer to pt_regs + * + * To-do: add all the accessor definitions to registers.h + * + * Will make this routine a lot easier to write. + */ +void show_regs(struct pt_regs *regs) +{ + printk(KERN_EMERG "restart_r0: \t0x%08lx syscall_nr: %ld\n", + regs->restart_r0, regs->syscall_nr); + printk(KERN_EMERG "preds: \t\t0x%08lx\n", regs->preds); + printk(KERN_EMERG "lc0: \t0x%08lx sa0: 0x%08lx m0: 0x%08lx\n", + regs->lc0, regs->sa0, regs->m0); + printk(KERN_EMERG "lc1: \t0x%08lx sa1: 0x%08lx m1: 0x%08lx\n", + regs->lc1, regs->sa1, regs->m1); + printk(KERN_EMERG "gp: \t0x%08lx ugp: 0x%08lx usr: 0x%08lx\n", + regs->gp, regs->ugp, regs->usr); + printk(KERN_EMERG "r0: \t0x%08lx %08lx %08lx %08lx\n", regs->r00, + regs->r01, + regs->r02, + regs->r03); + printk(KERN_EMERG "r4: \t0x%08lx %08lx %08lx %08lx\n", regs->r04, + regs->r05, + regs->r06, + regs->r07); + printk(KERN_EMERG "r8: \t0x%08lx %08lx %08lx %08lx\n", regs->r08, + regs->r09, + regs->r10, + regs->r11); + printk(KERN_EMERG "r12: \t0x%08lx %08lx %08lx %08lx\n", regs->r12, + regs->r13, + regs->r14, + regs->r15); + printk(KERN_EMERG "r16: \t0x%08lx %08lx %08lx %08lx\n", regs->r16, + regs->r17, + regs->r18, + regs->r19); + printk(KERN_EMERG "r20: \t0x%08lx %08lx %08lx %08lx\n", regs->r20, + regs->r21, + regs->r22, + regs->r23); + printk(KERN_EMERG "r24: \t0x%08lx %08lx %08lx %08lx\n", regs->r24, + regs->r25, + regs->r26, + regs->r27); + printk(KERN_EMERG "r28: \t0x%08lx %08lx %08lx %08lx\n", regs->r28, + regs->r29, + regs->r30, + regs->r31); + + printk(KERN_EMERG "elr: \t0x%08lx cause: 0x%08lx user_mode: %d\n", + pt_elr(regs), pt_cause(regs), user_mode(regs)); + printk(KERN_EMERG "psp: \t0x%08lx badva: 0x%08lx int_enabled: %d\n", + pt_psp(regs), pt_badva(regs), ints_enabled(regs)); +} + +void dummy_handler(struct pt_regs *regs) +{ + unsigned int elr = pt_elr(regs); + printk(KERN_ERR "Unimplemented handler; ELR=0x%08x\n", elr); +} + + +void arch_do_IRQ(struct pt_regs *regs) +{ + int irq = pt_cause(regs); + struct pt_regs *old_regs = set_irq_regs(regs); + + irq_enter(); + generic_handle_irq(irq); + irq_exit(); + set_irq_regs(old_regs); +} diff --git a/arch/hexagon/kernel/vm_init_segtable.S b/arch/hexagon/kernel/vm_init_segtable.S new file mode 100644 index 0000000..aebb35b --- /dev/null +++ b/arch/hexagon/kernel/vm_init_segtable.S @@ -0,0 +1,442 @@ +/* + * Initial page table for Linux kernel under Hexagon VM, + * + * Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +/* + * These tables are pre-computed and linked into kernel. + */ + +#include <asm/vm_mmu.h> +/* #include <asm/iomap.h> */ + +/* + * Start with mapping PA=0 to both VA=0x0 and VA=0xc000000 as 16MB large pages. + * No user mode access, RWX, write-back cache. The entry needs + * to be replicated for all 4 virtual segments mapping to the page. + */ + +/* "Big Kernel Page" */ +#define BKP(pa) (((pa) & __HVM_PTE_PGMASK_4MB) \ + | __HVM_PTE_R | __HVM_PTE_W | __HVM_PTE_X \ + | __HEXAGON_C_WB_L2 << 6 \ + | __HVM_PDE_S_16MB) + +/* No cache version */ + +#define BKPG_IO(pa) (((pa) & __HVM_PTE_PGMASK_16MB) \ + | __HVM_PTE_R | __HVM_PTE_W | __HVM_PTE_X \ + | __HVM_PDE_S_16MB | __HEXAGON_C_DEV << 6 ) + +#define FOURK_IO(pa) (((pa) & __HVM_PTE_PGMASK_4KB) \ + | __HVM_PTE_R | __HVM_PTE_W | __HVM_PTE_X \ + | __HEXAGON_C_DEV << 6 ) + +#define L2_PTR(pa) (((pa) & __HVM_PTE_PGMASK_4KB) \ + | __HVM_PDE_S_4KB ) + +#define X __HVM_PDE_S_INVALID + + .p2align 12 + .globl swapper_pg_dir + .globl _K_init_segtable +swapper_pg_dir: +/* VA 0x00000000 */ + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X + .word X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X + .word X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X + .word X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X + .word X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X + .word X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X + .word X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X + .word X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X +/* VA 0x40000000 */ + .word X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X + .word X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X + .word X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X + .word X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X + .word X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X + .word X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X + .word X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X + .word X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X +/* VA 0x80000000 */ + .word X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X + .word X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X + .word X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X + .word X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X + .word X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X +/*0xa8*/.word X,X,X,X +#ifdef CONFIG_COMET_EARLY_UART_DEBUG +UART_PTE_ENTRY: +/*0xa9*/.word BKPG_IO(0xa9000000),BKPG_IO(0xa9000000),BKPG_IO(0xa9000000),BKPG_IO(0xa9000000) +#else +/*0xa9*/.word X,X,X,X +#endif +/*0xaa*/.word X,X,X,X +/*0xab*/.word X,X,X,X +/*0xac*/.word X,X,X,X +/*0xad*/.word X,X,X,X +/*0xae*/.word X,X,X,X +/*0xaf*/.word X,X,X,X +/*0xb0*/.word X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X + .word X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X,X +_K_init_segtable: +/* VA 0xC0000000 */ + .word BKP(0x00000000), BKP(0x00400000), BKP(0x00800000), BKP(0x00c00000) + .word BKP(0x01000000), BKP(0x01400000), BKP(0x01800000), BKP(0x01c00000) + .word BKP(0x02000000), BKP(0x02400000), BKP(0x02800000), BKP(0x02c00000) + .word BKP(0x03000000), BKP(0x03400000), BKP(0x03800000), BKP(0x03c00000) + .word BKP(0x04000000), BKP(0x04400000), BKP(0x04800000), BKP(0x04c00000) + .word BKP(0x05000000), BKP(0x05400000), BKP(0x05800000), BKP(0x05c00000) + .word BKP(0x06000000), BKP(0x06400000), BKP(0x06800000), BKP(0x06c00000) + .word BKP(0x07000000), BKP(0x07400000), BKP(0x07800000), BKP(0x07c00000) + + .word BKP(0x08000000), BKP(0x08400000), BKP(0x08800000), BKP(0x08c00000) + .word BKP(0x09000000), BKP(0x09400000), BKP(0x09800000), BKP(0x09c00000) + .word BKP(0x0a000000), BKP(0x0a400000), BKP(0x0a800000), BKP(0x0ac00000) + .word BKP(0x0b000000), BKP(0x0b400000), BKP(0x0b800000), BKP(0x0bc00000) + .word BKP(0x0c000000), BKP(0x0c400000), BKP(0x0c800000), BKP(0x0cc00000) + .word BKP(0x0d000000), BKP(0x0d400000), BKP(0x0d800000), BKP(0x0dc00000) + .word BKP(0x0e000000), BKP(0x0e400000), BKP(0x0e800000), BKP(0x0ec00000) + .word BKP(0x0f000000), BKP(0x0f400000), BKP(0x0f800000), BKP(0x0fc00000) + + .word BKP(0x10000000), BKP(0x10400000), BKP(0x10800000), BKP(0x10c00000) + .word BKP(0x11000000), BKP(0x11400000), BKP(0x11800000), BKP(0x11c00000) + .word BKP(0x12000000), BKP(0x12400000), BKP(0x12800000), BKP(0x12c00000) + .word BKP(0x13000000), BKP(0x13400000), BKP(0x13800000), BKP(0x13c00000) + .word BKP(0x14000000), BKP(0x14400000), BKP(0x14800000), BKP(0x14c00000) + .word BKP(0x15000000), BKP(0x15400000), BKP(0x15800000), BKP(0x15c00000) + .word BKP(0x16000000), BKP(0x16400000), BKP(0x16800000), BKP(0x16c00000) + .word BKP(0x17000000), BKP(0x17400000), BKP(0x17800000), BKP(0x17c00000) + + .word BKP(0x18000000), BKP(0x18400000), BKP(0x18800000), BKP(0x18c00000) + .word BKP(0x19000000), BKP(0x19400000), BKP(0x19800000), BKP(0x19c00000) + .word BKP(0x1a000000), BKP(0x1a400000), BKP(0x1a800000), BKP(0x1ac00000) + .word BKP(0x1b000000), BKP(0x1b400000), BKP(0x1b800000), BKP(0x1bc00000) + .word BKP(0x1c000000), BKP(0x1c400000), BKP(0x1c800000), BKP(0x1cc00000) + .word BKP(0x1d000000), BKP(0x1d400000), BKP(0x1d800000), BKP(0x1dc00000) + .word BKP(0x1e000000), BKP(0x1e400000), BKP(0x1e800000), BKP(0x1ec00000) + .word BKP(0x1f000000), BKP(0x1f400000), BKP(0x1f800000), BKP(0x1fc00000) + + .word BKP(0x20000000), BKP(0x20400000), BKP(0x20800000), BKP(0x20c00000) + .word BKP(0x21000000), BKP(0x21400000), BKP(0x21800000), BKP(0x21c00000) + .word BKP(0x22000000), BKP(0x22400000), BKP(0x22800000), BKP(0x22c00000) + .word BKP(0x23000000), BKP(0x23400000), BKP(0x23800000), BKP(0x23c00000) + .word BKP(0x24000000), BKP(0x24400000), BKP(0x24800000), BKP(0x24c00000) + .word BKP(0x25000000), BKP(0x25400000), BKP(0x25800000), BKP(0x25c00000) + .word BKP(0x26000000), BKP(0x26400000), BKP(0x26800000), BKP(0x26c00000) + .word BKP(0x27000000), BKP(0x27400000), BKP(0x27800000), BKP(0x27c00000) + + .word BKP(0x28000000), BKP(0x28400000), BKP(0x28800000), BKP(0x28c00000) + .word BKP(0x29000000), BKP(0x29400000), BKP(0x29800000), BKP(0x29c00000) + .word BKP(0x2a000000), BKP(0x2a400000), BKP(0x2a800000), BKP(0x2ac00000) + .word BKP(0x2b000000), BKP(0x2b400000), BKP(0x2b800000), BKP(0x2bc00000) + .word BKP(0x2c000000), BKP(0x2c400000), BKP(0x2c800000), BKP(0x2cc00000) + .word BKP(0x2d000000), BKP(0x2d400000), BKP(0x2d800000), BKP(0x2dc00000) + .word BKP(0x2e000000), BKP(0x2e400000), BKP(0x2e800000), BKP(0x2ec00000) + .word BKP(0x2f000000), BKP(0x2f400000), BKP(0x2f800000), BKP(0x2fc00000) + + .word BKP(0x30000000), BKP(0x30400000), BKP(0x30800000), BKP(0x30c00000) + .word BKP(0x31000000), BKP(0x31400000), BKP(0x31800000), BKP(0x31c00000) + .word BKP(0x32000000), BKP(0x32400000), BKP(0x32800000), BKP(0x32c00000) + .word BKP(0x33000000), BKP(0x33400000), BKP(0x33800000), BKP(0x33c00000) + .word BKP(0x34000000), BKP(0x34400000), BKP(0x34800000), BKP(0x34c00000) + .word BKP(0x35000000), BKP(0x35400000), BKP(0x35800000), BKP(0x35c00000) + .word BKP(0x36000000), BKP(0x36400000), BKP(0x36800000), BKP(0x36c00000) + .word BKP(0x37000000), BKP(0x37400000), BKP(0x37800000), BKP(0x37c00000) + + .word BKP(0x38000000), BKP(0x38400000), BKP(0x38800000), BKP(0x38c00000) + .word BKP(0x39000000), BKP(0x39400000), BKP(0x39800000), BKP(0x39c00000) + .word BKP(0x3a000000), BKP(0x3a400000), BKP(0x3a800000), BKP(0x3ac00000) + .word BKP(0x3b000000), BKP(0x3b400000), BKP(0x3b800000), BKP(0x3bc00000) + .word BKP(0x3c000000), BKP(0x3c400000), BKP(0x3c800000), BKP(0x3cc00000) + .word BKP(0x3d000000), BKP(0x3d400000), BKP(0x3d800000), BKP(0x3dc00000) +_K_io_map: + .word X,X,X,X /* 0x3e000000 - device IO early remap */ + .word X,X,X,X /* 0x3f000000 - hypervisor space*/ + +#if 0 +/* + * This is in here as an example for devices which need to be mapped really + * early. + */ + .p2align 12 + .globl _K_io_kmap + .globl _K_init_devicetable +_K_init_devicetable: /* Should be 4MB worth of entries */ + .word FOURK_IO(MSM_GPIO1_PHYS),FOURK_IO(MSM_GPIO2_PHYS),FOURK_IO(MSM_SIRC_PHYS),X + .word FOURK_IO(TLMM_GPIO1_PHYS),X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X + .word X,X,X,X +#endif diff --git a/arch/hexagon/kernel/vm_ops.S b/arch/hexagon/kernel/vm_ops.S new file mode 100644 index 0000000..24d7fca --- /dev/null +++ b/arch/hexagon/kernel/vm_ops.S @@ -0,0 +1,102 @@ +/* + * Hexagon VM instruction support + * + * Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +#include <linux/linkage.h> +#include <asm/hexagon_vm.h> + +/* + * C wrappers for virtual machine "instructions". These + * could be, and perhaps some day will be, handled as in-line + * macros, but for tracing/debugging it's handy to have + * a single point of invocation for each of them. + * Conveniently, they take paramters and return values + * consistent with the ABI calling convention. + */ + +ENTRY(__vmrte) + trap1(#HVM_TRAP1_VMRTE); + jumpr R31; + +ENTRY(__vmsetvec) + trap1(#HVM_TRAP1_VMSETVEC); + jumpr R31; + +ENTRY(__vmsetie) + trap1(#HVM_TRAP1_VMSETIE); + jumpr R31; + +ENTRY(__vmgetie) + trap1(#HVM_TRAP1_VMGETIE); + jumpr R31; + +ENTRY(__vmintop) + trap1(#HVM_TRAP1_VMINTOP); + jumpr R31; + +ENTRY(__vmclrmap) + trap1(#HVM_TRAP1_VMCLRMAP); + jumpr R31; + +ENTRY(__vmnewmap) + r1 = #VM_NEWMAP_TYPE_PGTABLES; + trap1(#HVM_TRAP1_VMNEWMAP); + jumpr R31; + +ENTRY(__vmcache) + trap1(#HVM_TRAP1_VMCACHE); + jumpr R31; + +ENTRY(__vmgettime) + trap1(#HVM_TRAP1_VMGETTIME); + jumpr R31; + +ENTRY(__vmsettime) + trap1(#HVM_TRAP1_VMSETTIME); + jumpr R31; + +ENTRY(__vmwait) + trap1(#HVM_TRAP1_VMWAIT); + jumpr R31; + +ENTRY(__vmyield) + trap1(#HVM_TRAP1_VMYIELD); + jumpr R31; + +ENTRY(__vmstart) + trap1(#HVM_TRAP1_VMSTART); + jumpr R31; + +ENTRY(__vmstop) + trap1(#HVM_TRAP1_VMSTOP); + jumpr R31; + +ENTRY(__vmvpid) + trap1(#HVM_TRAP1_VMVPID); + jumpr R31; + +/* Probably not actually going to use these; see vm_entry.S */ + +ENTRY(__vmsetregs) + trap1(#HVM_TRAP1_VMSETREGS); + jumpr R31; + +ENTRY(__vmgetregs) + trap1(#HVM_TRAP1_VMGETREGS); + jumpr R31; diff --git a/arch/hexagon/kernel/vm_switch.S b/arch/hexagon/kernel/vm_switch.S new file mode 100644 index 0000000..0decf2f --- /dev/null +++ b/arch/hexagon/kernel/vm_switch.S @@ -0,0 +1,95 @@ +/* + * Context switch support for Hexagon + * + * Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +#include <asm/asm-offsets.h> + +.text + +/* + * The register used as a fast-path thread information pointer + * is determined as a kernel configuration option. If it happens + * to be a callee-save register, we're going to be saving and + * restoring it twice here. + * + * This code anticipates a revised ABI where R20-23 are added + * to the set of callee-save registers, but this should be + * backward compatible to legacy tools. + */ + + +/* + * void switch_to(struct task_struct *prev, + * struct task_struct *next, struct task_struct *last); + */ + .p2align 2 + .globl __switch_to + .type __switch_to, @function + +/* + * When we exit the wormhole, we need to store the previous task + * in the new R0's pointer. Technically it should be R2, but they should + * be the same; seems like a legacy thing. In short, don't butcher + * R0, let it go back out unmolested. + */ + +__switch_to: + /* + * Push callee-saves onto "prev" stack. + * Here, we're sneaky because the LR and FP + * storage of the thread_stack structure + * is automagically allocated by allocframe, + * so we pass struct size less 8. + */ + allocframe(#(_SWITCH_STACK_SIZE - 8)); + memd(R29+#(_SWITCH_R2726))=R27:26; + memd(R29+#(_SWITCH_R2524))=R25:24; + memd(R29+#(_SWITCH_R2322))=R23:22; + memd(R29+#(_SWITCH_R2120))=R21:20; + memd(R29+#(_SWITCH_R1918))=R19:18; + memd(R29+#(_SWITCH_R1716))=R17:16; + /* Stash thread_info pointer in task_struct */ + memw(R0+#_TASK_THREAD_INFO) = THREADINFO_REG; + memw(R0 +#(_TASK_STRUCT_THREAD + _THREAD_STRUCT_SWITCH_SP)) = R29; + /* Switch to "next" stack and restore callee saves from there */ + R29 = memw(R1 + #(_TASK_STRUCT_THREAD + _THREAD_STRUCT_SWITCH_SP)); + { + R27:26 = memd(R29+#(_SWITCH_R2726)); + R25:24 = memd(R29+#(_SWITCH_R2524)); + } + { + R23:22 = memd(R29+#(_SWITCH_R2322)); + R21:20 = memd(R29+#(_SWITCH_R2120)); + } + { + R19:18 = memd(R29+#(_SWITCH_R1918)); + R17:16 = memd(R29+#(_SWITCH_R1716)); + } + { + /* THREADINFO_REG is currently one of the callee-saved regs + * above, and so be sure to re-load it last. + */ + THREADINFO_REG = memw(R1 + #_TASK_THREAD_INFO); + R31:30 = memd(R29+#_SWITCH_FP); + } + { + R29 = add(R29,#_SWITCH_STACK_SIZE); + jumpr R31; + } + .size __switch_to, .-__switch_to diff --git a/arch/hexagon/kernel/vm_vectors.S b/arch/hexagon/kernel/vm_vectors.S new file mode 100644 index 0000000..97a4b50 --- /dev/null +++ b/arch/hexagon/kernel/vm_vectors.S @@ -0,0 +1,48 @@ +/* + * Event jump tables + * + * Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +#include <asm/hexagon_vm.h> + +.text + +/* This is registered early on to allow angel */ +.global _K_provisional_vec +_K_provisional_vec: + jump 1f; + jump 1f; + jump 1f; + jump 1f; + jump 1f; + trap1(#HVM_TRAP1_VMRTE) + jump 1f; + jump 1f; + + +.global _K_VM_event_vector +_K_VM_event_vector: +1: + jump 1b; /* Reset */ + jump _K_enter_machcheck; + jump _K_enter_genex; + jump 1b; /* 3 Rsvd */ + jump 1b; /* 4 Rsvd */ + jump _K_enter_trap0; + jump 1b; /* 6 Rsvd */ + jump _K_enter_interrupt; |
