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/*
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* sparc helpers
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*
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* Copyright (c) 2003-2005 Fabrice Bellard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <stdarg.h> |
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include <inttypes.h> |
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#include <signal.h> |
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#include <assert.h> |
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#include "cpu.h" |
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#include "exec-all.h" |
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|
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//#define DEBUG_MMU
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/* Sparc MMU emulation */
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|
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/* thread support */
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spinlock_t global_cpu_lock = SPIN_LOCK_UNLOCKED; |
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|
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void cpu_lock(void) |
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{
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spin_lock(&global_cpu_lock); |
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} |
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|
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void cpu_unlock(void) |
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{
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spin_unlock(&global_cpu_lock); |
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} |
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|
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#if defined(CONFIG_USER_ONLY)
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|
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int cpu_sparc_handle_mmu_fault(CPUState *env, target_ulong address, int rw, |
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int is_user, int is_softmmu) |
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{
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if (rw & 2) |
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env->exception_index = TT_TFAULT; |
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else
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env->exception_index = TT_DFAULT; |
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return 1; |
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} |
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|
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#else
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|
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#ifndef TARGET_SPARC64
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/*
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* Sparc V8 Reference MMU (SRMMU)
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*/
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static const int access_table[8][8] = { |
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{ 0, 0, 0, 0, 2, 0, 3, 3 },
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{ 0, 0, 0, 0, 2, 0, 0, 0 },
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{ 2, 2, 0, 0, 0, 2, 3, 3 },
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{ 2, 2, 0, 0, 0, 2, 0, 0 },
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{ 2, 0, 2, 0, 2, 2, 3, 3 },
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{ 2, 0, 2, 0, 2, 0, 2, 0 },
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{ 2, 2, 2, 0, 2, 2, 3, 3 },
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{ 2, 2, 2, 0, 2, 2, 2, 0 }
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}; |
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|
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/* 1 = write OK */
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static const int rw_table[2][8] = { |
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{ 0, 1, 0, 1, 0, 1, 0, 1 },
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{ 0, 1, 0, 1, 0, 0, 0, 0 }
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}; |
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|
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int get_physical_address (CPUState *env, target_phys_addr_t *physical, int *prot, |
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int *access_index, target_ulong address, int rw, |
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int is_user)
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{
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int access_perms = 0; |
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target_phys_addr_t pde_ptr; |
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uint32_t pde; |
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target_ulong virt_addr; |
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int error_code = 0, is_dirty; |
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unsigned long page_offset; |
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|
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virt_addr = address & TARGET_PAGE_MASK; |
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if ((env->mmuregs[0] & MMU_E) == 0) { /* MMU disabled */ |
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*physical = address; |
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*prot = PAGE_READ | PAGE_WRITE; |
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return 0; |
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} |
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|
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*access_index = ((rw & 1) << 2) | (rw & 2) | (is_user? 0 : 1); |
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*physical = 0xfffff000;
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|
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/* SPARC reference MMU table walk: Context table->L1->L2->PTE */
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/* Context base + context number */
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pde_ptr = (env->mmuregs[1] << 4) + (env->mmuregs[2] << 2); |
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pde = ldl_phys(pde_ptr); |
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|
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/* Ctx pde */
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switch (pde & PTE_ENTRYTYPE_MASK) {
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default:
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case 0: /* Invalid */ |
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return 1 << 2; |
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case 2: /* L0 PTE, maybe should not happen? */ |
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case 3: /* Reserved */ |
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return 4 << 2; |
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case 1: /* L0 PDE */ |
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pde_ptr = ((address >> 22) & ~3) + ((pde & ~3) << 4); |
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pde = ldl_phys(pde_ptr); |
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|
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switch (pde & PTE_ENTRYTYPE_MASK) {
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default:
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case 0: /* Invalid */ |
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return (1 << 8) | (1 << 2); |
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case 3: /* Reserved */ |
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return (1 << 8) | (4 << 2); |
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case 1: /* L1 PDE */ |
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pde_ptr = ((address & 0xfc0000) >> 16) + ((pde & ~3) << 4); |
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pde = ldl_phys(pde_ptr); |
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|
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switch (pde & PTE_ENTRYTYPE_MASK) {
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default:
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case 0: /* Invalid */ |
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return (2 << 8) | (1 << 2); |
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case 3: /* Reserved */ |
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return (2 << 8) | (4 << 2); |
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case 1: /* L2 PDE */ |
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pde_ptr = ((address & 0x3f000) >> 10) + ((pde & ~3) << 4); |
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pde = ldl_phys(pde_ptr); |
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|
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switch (pde & PTE_ENTRYTYPE_MASK) {
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default:
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case 0: /* Invalid */ |
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return (3 << 8) | (1 << 2); |
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case 1: /* PDE, should not happen */ |
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case 3: /* Reserved */ |
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return (3 << 8) | (4 << 2); |
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case 2: /* L3 PTE */ |
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virt_addr = address & TARGET_PAGE_MASK; |
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page_offset = (address & TARGET_PAGE_MASK) & (TARGET_PAGE_SIZE - 1);
|
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} |
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break;
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case 2: /* L2 PTE */ |
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virt_addr = address & ~0x3ffff;
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page_offset = address & 0x3ffff;
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} |
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break;
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case 2: /* L1 PTE */ |
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virt_addr = address & ~0xffffff;
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page_offset = address & 0xffffff;
|
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} |
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} |
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|
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/* update page modified and dirty bits */
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is_dirty = (rw & 1) && !(pde & PG_MODIFIED_MASK);
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if (!(pde & PG_ACCESSED_MASK) || is_dirty) {
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pde |= PG_ACCESSED_MASK; |
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if (is_dirty)
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pde |= PG_MODIFIED_MASK; |
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stl_phys_notdirty(pde_ptr, pde); |
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} |
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/* check access */
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access_perms = (pde & PTE_ACCESS_MASK) >> PTE_ACCESS_SHIFT; |
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error_code = access_table[*access_index][access_perms]; |
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if (error_code && !(env->mmuregs[0] & MMU_NF)) |
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return error_code;
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|
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/* the page can be put in the TLB */
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*prot = PAGE_READ; |
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if (pde & PG_MODIFIED_MASK) {
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/* only set write access if already dirty... otherwise wait
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for dirty access */
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if (rw_table[is_user][access_perms])
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*prot |= PAGE_WRITE; |
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} |
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|
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/* Even if large ptes, we map only one 4KB page in the cache to
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avoid filling it too fast */
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*physical = ((pde & PTE_ADDR_MASK) << 4) + page_offset;
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return error_code;
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} |
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|
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/* Perform address translation */
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int cpu_sparc_handle_mmu_fault (CPUState *env, target_ulong address, int rw, |
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int is_user, int is_softmmu) |
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{
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target_ulong virt_addr; |
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target_phys_addr_t paddr; |
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unsigned long vaddr; |
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int error_code = 0, prot, ret = 0, access_index; |
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|
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error_code = get_physical_address(env, &paddr, &prot, &access_index, address, rw, is_user); |
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if (error_code == 0) { |
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virt_addr = address & TARGET_PAGE_MASK; |
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vaddr = virt_addr + ((address & TARGET_PAGE_MASK) & (TARGET_PAGE_SIZE - 1));
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ret = tlb_set_page(env, vaddr, paddr, prot, is_user, is_softmmu); |
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return ret;
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} |
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|
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if (env->mmuregs[3]) /* Fault status register */ |
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env->mmuregs[3] = 1; /* overflow (not read before another fault) */ |
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env->mmuregs[3] |= (access_index << 5) | error_code | 2; |
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env->mmuregs[4] = address; /* Fault address register */ |
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|
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if ((env->mmuregs[0] & MMU_NF) || env->psret == 0) { |
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// No fault mode: if a mapping is available, just override
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// permissions. If no mapping is available, redirect accesses to
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// neverland. Fake/overridden mappings will be flushed when
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// switching to normal mode.
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vaddr = address & TARGET_PAGE_MASK; |
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prot = PAGE_READ | PAGE_WRITE; |
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ret = tlb_set_page(env, vaddr, paddr, prot, is_user, is_softmmu); |
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return ret;
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} else {
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if (rw & 2) |
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env->exception_index = TT_TFAULT; |
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else
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env->exception_index = TT_DFAULT; |
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return 1; |
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} |
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} |
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|
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target_ulong mmu_probe(CPUState *env, target_ulong address, int mmulev)
|
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{
|
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target_phys_addr_t pde_ptr; |
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uint32_t pde; |
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|
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/* Context base + context number */
|
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pde_ptr = (env->mmuregs[1] << 4) + (env->mmuregs[2] << 2); |
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pde = ldl_phys(pde_ptr); |
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|
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switch (pde & PTE_ENTRYTYPE_MASK) {
|
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default:
|
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case 0: /* Invalid */ |
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case 2: /* PTE, maybe should not happen? */ |
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case 3: /* Reserved */ |
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return 0; |
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case 1: /* L1 PDE */ |
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if (mmulev == 3) |
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return pde;
|
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pde_ptr = ((address >> 22) & ~3) + ((pde & ~3) << 4); |
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pde = ldl_phys(pde_ptr); |
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|
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switch (pde & PTE_ENTRYTYPE_MASK) {
|
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default:
|
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case 0: /* Invalid */ |
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case 3: /* Reserved */ |
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return 0; |
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case 2: /* L1 PTE */ |
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return pde;
|
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case 1: /* L2 PDE */ |
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if (mmulev == 2) |
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return pde;
|
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pde_ptr = ((address & 0xfc0000) >> 16) + ((pde & ~3) << 4); |
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pde = ldl_phys(pde_ptr); |
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|
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switch (pde & PTE_ENTRYTYPE_MASK) {
|
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default:
|
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case 0: /* Invalid */ |
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case 3: /* Reserved */ |
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return 0; |
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case 2: /* L2 PTE */ |
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return pde;
|
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case 1: /* L3 PDE */ |
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if (mmulev == 1) |
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return pde;
|
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pde_ptr = ((address & 0x3f000) >> 10) + ((pde & ~3) << 4); |
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pde = ldl_phys(pde_ptr); |
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|
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switch (pde & PTE_ENTRYTYPE_MASK) {
|
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default:
|
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case 0: /* Invalid */ |
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case 1: /* PDE, should not happen */ |
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case 3: /* Reserved */ |
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return 0; |
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case 2: /* L3 PTE */ |
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return pde;
|
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} |
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} |
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} |
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} |
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return 0; |
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} |
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|
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#ifdef DEBUG_MMU
|
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void dump_mmu(CPUState *env)
|
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{
|
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target_ulong va, va1, va2; |
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unsigned int n, m, o; |
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target_phys_addr_t pde_ptr, pa; |
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uint32_t pde; |
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|
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printf("MMU dump:\n");
|
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pde_ptr = (env->mmuregs[1] << 4) + (env->mmuregs[2] << 2); |
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pde = ldl_phys(pde_ptr); |
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printf("Root ptr: " TARGET_FMT_lx ", ctx: %d\n", env->mmuregs[1] << 4, env->mmuregs[2]); |
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for (n = 0, va = 0; n < 256; n++, va += 16 * 1024 * 1024) { |
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pde_ptr = mmu_probe(env, va, 2);
|
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if (pde_ptr) {
|
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pa = cpu_get_phys_page_debug(env, va); |
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printf("VA: " TARGET_FMT_lx ", PA: " TARGET_FMT_lx " PDE: " TARGET_FMT_lx "\n", va, pa, pde_ptr); |
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for (m = 0, va1 = va; m < 64; m++, va1 += 256 * 1024) { |
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pde_ptr = mmu_probe(env, va1, 1);
|
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if (pde_ptr) {
|
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pa = cpu_get_phys_page_debug(env, va1); |
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printf(" VA: " TARGET_FMT_lx ", PA: " TARGET_FMT_lx " PDE: " TARGET_FMT_lx "\n", va1, pa, pde_ptr); |
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for (o = 0, va2 = va1; o < 64; o++, va2 += 4 * 1024) { |
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pde_ptr = mmu_probe(env, va2, 0);
|
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if (pde_ptr) {
|
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pa = cpu_get_phys_page_debug(env, va2); |
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printf(" VA: " TARGET_FMT_lx ", PA: " TARGET_FMT_lx " PTE: " TARGET_FMT_lx "\n", va2, pa, pde_ptr); |
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} |
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} |
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} |
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} |
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} |
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} |
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printf("MMU dump ends\n");
|
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} |
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#endif /* DEBUG_MMU */ |
| 332 |
|
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#else /* !TARGET_SPARC64 */ |
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/*
|
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* UltraSparc IIi I/DMMUs
|
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*/
|
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static int get_physical_address_data(CPUState *env, target_phys_addr_t *physical, int *prot, |
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int *access_index, target_ulong address, int rw, |
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int is_user)
|
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{
|
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target_ulong mask; |
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unsigned int i; |
| 343 |
|
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if ((env->lsu & DMMU_E) == 0) { /* DMMU disabled */ |
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*physical = address; |
| 346 |
*prot = PAGE_READ | PAGE_WRITE; |
| 347 |
return 0; |
| 348 |
} |
| 349 |
|
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for (i = 0; i < 64; i++) { |
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switch ((env->dtlb_tte[i] >> 61) & 3) { |
| 352 |
default:
|
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case 0x0: // 8k |
| 354 |
mask = 0xffffffffffffe000ULL;
|
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break;
|
| 356 |
case 0x1: // 64k |
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mask = 0xffffffffffff0000ULL;
|
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break;
|
| 359 |
case 0x2: // 512k |
| 360 |
mask = 0xfffffffffff80000ULL;
|
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break;
|
| 362 |
case 0x3: // 4M |
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mask = 0xffffffffffc00000ULL;
|
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break;
|
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} |
| 366 |
// ctx match, vaddr match?
|
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if (env->dmmuregs[1] == (env->dtlb_tag[i] & 0x1fff) && |
| 368 |
(address & mask) == (env->dtlb_tag[i] & ~0x1fffULL)) {
|
| 369 |
// valid, access ok?
|
| 370 |
if ((env->dtlb_tte[i] & 0x8000000000000000ULL) == 0 || |
| 371 |
((env->dtlb_tte[i] & 0x4) && is_user) ||
|
| 372 |
(!(env->dtlb_tte[i] & 0x2) && (rw == 1))) { |
| 373 |
if (env->dmmuregs[3]) /* Fault status register */ |
| 374 |
env->dmmuregs[3] = 2; /* overflow (not read before another fault) */ |
| 375 |
env->dmmuregs[3] |= (is_user << 3) | ((rw == 1) << 2) | 1; |
| 376 |
env->dmmuregs[4] = address; /* Fault address register */ |
| 377 |
env->exception_index = TT_DFAULT; |
| 378 |
#ifdef DEBUG_MMU
|
| 379 |
printf("DFAULT at 0x%llx\n", address);
|
| 380 |
#endif
|
| 381 |
return 1; |
| 382 |
} |
| 383 |
*physical = (env->dtlb_tte[i] & mask & 0x1fffffff000ULL) + (address & ~mask & 0x1fffffff000ULL); |
| 384 |
*prot = PAGE_READ; |
| 385 |
if (env->dtlb_tte[i] & 0x2) |
| 386 |
*prot |= PAGE_WRITE; |
| 387 |
return 0; |
| 388 |
} |
| 389 |
} |
| 390 |
#ifdef DEBUG_MMU
|
| 391 |
printf("DMISS at 0x%llx\n", address);
|
| 392 |
#endif
|
| 393 |
env->exception_index = TT_DMISS; |
| 394 |
return 1; |
| 395 |
} |
| 396 |
|
| 397 |
static int get_physical_address_code(CPUState *env, target_phys_addr_t *physical, int *prot, |
| 398 |
int *access_index, target_ulong address, int rw, |
| 399 |
int is_user)
|
| 400 |
{
|
| 401 |
target_ulong mask; |
| 402 |
unsigned int i; |
| 403 |
|
| 404 |
if ((env->lsu & IMMU_E) == 0) { /* IMMU disabled */ |
| 405 |
*physical = address; |
| 406 |
*prot = PAGE_READ; |
| 407 |
return 0; |
| 408 |
} |
| 409 |
|
| 410 |
for (i = 0; i < 64; i++) { |
| 411 |
switch ((env->itlb_tte[i] >> 61) & 3) { |
| 412 |
default:
|
| 413 |
case 0x0: // 8k |
| 414 |
mask = 0xffffffffffffe000ULL;
|
| 415 |
break;
|
| 416 |
case 0x1: // 64k |
| 417 |
mask = 0xffffffffffff0000ULL;
|
| 418 |
break;
|
| 419 |
case 0x2: // 512k |
| 420 |
mask = 0xfffffffffff80000ULL;
|
| 421 |
break;
|
| 422 |
case 0x3: // 4M |
| 423 |
mask = 0xffffffffffc00000ULL;
|
| 424 |
break;
|
| 425 |
} |
| 426 |
// ctx match, vaddr match?
|
| 427 |
if (env->dmmuregs[1] == (env->itlb_tag[i] & 0x1fff) && |
| 428 |
(address & mask) == (env->itlb_tag[i] & ~0x1fffULL)) {
|
| 429 |
// valid, access ok?
|
| 430 |
if ((env->itlb_tte[i] & 0x8000000000000000ULL) == 0 || |
| 431 |
((env->itlb_tte[i] & 0x4) && is_user)) {
|
| 432 |
if (env->immuregs[3]) /* Fault status register */ |
| 433 |
env->immuregs[3] = 2; /* overflow (not read before another fault) */ |
| 434 |
env->immuregs[3] |= (is_user << 3) | 1; |
| 435 |
env->exception_index = TT_TFAULT; |
| 436 |
#ifdef DEBUG_MMU
|
| 437 |
printf("TFAULT at 0x%llx\n", address);
|
| 438 |
#endif
|
| 439 |
return 1; |
| 440 |
} |
| 441 |
*physical = (env->itlb_tte[i] & mask & 0x1fffffff000ULL) + (address & ~mask & 0x1fffffff000ULL); |
| 442 |
*prot = PAGE_READ; |
| 443 |
return 0; |
| 444 |
} |
| 445 |
} |
| 446 |
#ifdef DEBUG_MMU
|
| 447 |
printf("TMISS at 0x%llx\n", address);
|
| 448 |
#endif
|
| 449 |
env->exception_index = TT_TMISS; |
| 450 |
return 1; |
| 451 |
} |
| 452 |
|
| 453 |
int get_physical_address(CPUState *env, target_phys_addr_t *physical, int *prot, |
| 454 |
int *access_index, target_ulong address, int rw, |
| 455 |
int is_user)
|
| 456 |
{
|
| 457 |
if (rw == 2) |
| 458 |
return get_physical_address_code(env, physical, prot, access_index, address, rw, is_user);
|
| 459 |
else
|
| 460 |
return get_physical_address_data(env, physical, prot, access_index, address, rw, is_user);
|
| 461 |
} |
| 462 |
|
| 463 |
/* Perform address translation */
|
| 464 |
int cpu_sparc_handle_mmu_fault (CPUState *env, target_ulong address, int rw, |
| 465 |
int is_user, int is_softmmu) |
| 466 |
{
|
| 467 |
target_ulong virt_addr, vaddr; |
| 468 |
target_phys_addr_t paddr; |
| 469 |
int error_code = 0, prot, ret = 0, access_index; |
| 470 |
|
| 471 |
error_code = get_physical_address(env, &paddr, &prot, &access_index, address, rw, is_user); |
| 472 |
if (error_code == 0) { |
| 473 |
virt_addr = address & TARGET_PAGE_MASK; |
| 474 |
vaddr = virt_addr + ((address & TARGET_PAGE_MASK) & (TARGET_PAGE_SIZE - 1));
|
| 475 |
#ifdef DEBUG_MMU
|
| 476 |
printf("Translate at 0x%llx -> 0x%llx, vaddr 0x%llx\n", address, paddr, vaddr);
|
| 477 |
#endif
|
| 478 |
ret = tlb_set_page(env, vaddr, paddr, prot, is_user, is_softmmu); |
| 479 |
return ret;
|
| 480 |
} |
| 481 |
// XXX
|
| 482 |
return 1; |
| 483 |
} |
| 484 |
|
| 485 |
#ifdef DEBUG_MMU
|
| 486 |
void dump_mmu(CPUState *env)
|
| 487 |
{
|
| 488 |
unsigned int i; |
| 489 |
const char *mask; |
| 490 |
|
| 491 |
printf("MMU contexts: Primary: %lld, Secondary: %lld\n", env->dmmuregs[1], env->dmmuregs[2]); |
| 492 |
if ((env->lsu & DMMU_E) == 0) { |
| 493 |
printf("DMMU disabled\n");
|
| 494 |
} else {
|
| 495 |
printf("DMMU dump:\n");
|
| 496 |
for (i = 0; i < 64; i++) { |
| 497 |
switch ((env->dtlb_tte[i] >> 61) & 3) { |
| 498 |
default:
|
| 499 |
case 0x0: |
| 500 |
mask = " 8k";
|
| 501 |
break;
|
| 502 |
case 0x1: |
| 503 |
mask = " 64k";
|
| 504 |
break;
|
| 505 |
case 0x2: |
| 506 |
mask = "512k";
|
| 507 |
break;
|
| 508 |
case 0x3: |
| 509 |
mask = " 4M";
|
| 510 |
break;
|
| 511 |
} |
| 512 |
if ((env->dtlb_tte[i] & 0x8000000000000000ULL) != 0) { |
| 513 |
printf("VA: " TARGET_FMT_lx ", PA: " TARGET_FMT_lx ", %s, %s, %s, %s, ctx %lld\n", |
| 514 |
env->dtlb_tag[i] & ~0x1fffULL,
|
| 515 |
env->dtlb_tte[i] & 0x1ffffffe000ULL,
|
| 516 |
mask, |
| 517 |
env->dtlb_tte[i] & 0x4? "priv": "user", |
| 518 |
env->dtlb_tte[i] & 0x2? "RW": "RO", |
| 519 |
env->dtlb_tte[i] & 0x40? "locked": "unlocked", |
| 520 |
env->dtlb_tag[i] & 0x1fffULL);
|
| 521 |
} |
| 522 |
} |
| 523 |
} |
| 524 |
if ((env->lsu & IMMU_E) == 0) { |
| 525 |
printf("IMMU disabled\n");
|
| 526 |
} else {
|
| 527 |
printf("IMMU dump:\n");
|
| 528 |
for (i = 0; i < 64; i++) { |
| 529 |
switch ((env->itlb_tte[i] >> 61) & 3) { |
| 530 |
default:
|
| 531 |
case 0x0: |
| 532 |
mask = " 8k";
|
| 533 |
break;
|
| 534 |
case 0x1: |
| 535 |
mask = " 64k";
|
| 536 |
break;
|
| 537 |
case 0x2: |
| 538 |
mask = "512k";
|
| 539 |
break;
|
| 540 |
case 0x3: |
| 541 |
mask = " 4M";
|
| 542 |
break;
|
| 543 |
} |
| 544 |
if ((env->itlb_tte[i] & 0x8000000000000000ULL) != 0) { |
| 545 |
printf("VA: " TARGET_FMT_lx ", PA: " TARGET_FMT_lx ", %s, %s, %s, ctx %lld\n", |
| 546 |
env->itlb_tag[i] & ~0x1fffULL,
|
| 547 |
env->itlb_tte[i] & 0x1ffffffe000ULL,
|
| 548 |
mask, |
| 549 |
env->itlb_tte[i] & 0x4? "priv": "user", |
| 550 |
env->itlb_tte[i] & 0x40? "locked": "unlocked", |
| 551 |
env->itlb_tag[i] & 0x1fffULL);
|
| 552 |
} |
| 553 |
} |
| 554 |
} |
| 555 |
} |
| 556 |
#endif /* DEBUG_MMU */ |
| 557 |
|
| 558 |
#endif /* TARGET_SPARC64 */ |
| 559 |
#endif /* !CONFIG_USER_ONLY */ |
| 560 |
|
| 561 |
void memcpy32(target_ulong *dst, const target_ulong *src) |
| 562 |
{
|
| 563 |
dst[0] = src[0]; |
| 564 |
dst[1] = src[1]; |
| 565 |
dst[2] = src[2]; |
| 566 |
dst[3] = src[3]; |
| 567 |
dst[4] = src[4]; |
| 568 |
dst[5] = src[5]; |
| 569 |
dst[6] = src[6]; |
| 570 |
dst[7] = src[7]; |
| 571 |
} |