root / target-sparc / helper.c @ bc2c3909
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/*
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* sparc helpers
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*
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* Copyright (c) 2003 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 "exec.h" |
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//#define DEBUG_PCALL
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//#define DEBUG_MMU
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/* Sparc MMU emulation */
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/* thread support */
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spinlock_t global_cpu_lock = SPIN_LOCK_UNLOCKED; |
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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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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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#if defined(CONFIG_USER_ONLY)
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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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#else
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#define MMUSUFFIX _mmu
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#define GETPC() (__builtin_return_address(0)) |
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#define SHIFT 0 |
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#include "softmmu_template.h" |
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#define SHIFT 1 |
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#include "softmmu_template.h" |
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#define SHIFT 2 |
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#include "softmmu_template.h" |
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#define SHIFT 3 |
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#include "softmmu_template.h" |
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/* try to fill the TLB and return an exception if error. If retaddr is
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NULL, it means that the function was called in C code (i.e. not
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from generated code or from helper.c) */
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/* XXX: fix it to restore all registers */
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void tlb_fill(target_ulong addr, int is_write, int is_user, void *retaddr) |
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{ |
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TranslationBlock *tb; |
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int ret;
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unsigned long pc; |
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CPUState *saved_env; |
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/* XXX: hack to restore env in all cases, even if not called from
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generated code */
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saved_env = env; |
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env = cpu_single_env; |
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ret = cpu_sparc_handle_mmu_fault(env, addr, is_write, is_user, 1);
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if (ret) {
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if (retaddr) {
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/* now we have a real cpu fault */
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pc = (unsigned long)retaddr; |
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tb = tb_find_pc(pc); |
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if (tb) {
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/* the PC is inside the translated code. It means that we have
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a virtual CPU fault */
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cpu_restore_state(tb, env, pc, (void *)T2);
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} |
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} |
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cpu_loop_exit(); |
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} |
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env = saved_env; |
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} |
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#ifndef TARGET_SPARC64
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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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/* 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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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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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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*access_index = ((rw & 1) << 2) | (rw & 2) | (is_user? 0 : 1); |
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*physical = 0xfffff000;
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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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/* 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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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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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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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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/* 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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/* 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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/* 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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/* 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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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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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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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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#else
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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; |
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if ((env->lsu & DMMU_E) == 0) { /* DMMU disabled */ |
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*physical = address & 0xffffffff;
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*prot = PAGE_READ | PAGE_WRITE; |
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return 0; |
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} |
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for (i = 0; i < 64; i++) { |
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if ((env->dtlb_tte[i] & 0x8000000000000000ULL) != 0) { |
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switch (env->dtlb_tte[i] >> 60) { |
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default:
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case 0x4: // 8k |
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mask = 0xffffffffffffe000ULL;
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break;
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case 0x5: // 64k |
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mask = 0xffffffffffff0000ULL;
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break;
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case 0x6: // 512k |
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mask = 0xfffffffffff80000ULL;
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break;
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case 0x7: // 4M |
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mask = 0xffffffffffc00000ULL;
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break;
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} |
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// ctx match, vaddr match?
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if (env->dmmuregs[1] == (env->dtlb_tag[i] & 0x1fff) && |
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(address & mask) == (env->dtlb_tag[i] & ~0x1fffULL)) {
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// access ok?
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if (((env->dtlb_tte[i] & 0x4) && !(env->pstate & PS_PRIV)) || |
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(!(env->dtlb_tte[i] & 0x2) && (rw == 1))) { |
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env->exception_index = TT_DFAULT; |
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return 1; |
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} |
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*physical = env->dtlb_tte[i] & 0xffffe000;
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*prot = PAGE_READ; |
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if (env->dtlb_tte[i] & 0x2) |
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*prot |= PAGE_WRITE; |
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return 0; |
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} |
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} |
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} |
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env->exception_index = TT_DFAULT; |
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return 1; |
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} |
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static int get_physical_address_code(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; |
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if ((env->lsu & IMMU_E) == 0) { /* IMMU disabled */ |
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*physical = address & 0xffffffff;
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*prot = PAGE_READ; |
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return 0; |
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} |
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for (i = 0; i < 64; i++) { |
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if ((env->itlb_tte[i] & 0x8000000000000000ULL) != 0) { |
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switch (env->itlb_tte[i] >> 60) { |
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default:
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case 0x4: // 8k |
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mask = 0xffffffffffffe000ULL;
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break;
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case 0x5: // 64k |
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mask = 0xffffffffffff0000ULL;
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break;
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case 0x6: // 512k |
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mask = 0xfffffffffff80000ULL;
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break;
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case 0x7: // 4M |
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mask = 0xffffffffffc00000ULL;
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break;
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} |
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// ctx match, vaddr match?
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if (env->immuregs[1] == (env->itlb_tag[i] & 0x1fff) && |
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(address & mask) == (env->itlb_tag[i] & ~0x1fffULL)) {
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// access ok?
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if ((env->itlb_tte[i] & 0x4) && !(env->pstate & PS_PRIV)) { |
357 |
env->exception_index = TT_TFAULT; |
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return 1; |
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} |
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*physical = env->itlb_tte[i] & 0xffffe000;
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*prot = PAGE_READ; |
362 |
return 0; |
363 |
} |
364 |
} |
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} |
366 |
env->exception_index = TT_TFAULT; |
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return 1; |
368 |
} |
369 |
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int get_physical_address(CPUState *env, target_phys_addr_t *physical, int *prot, |
371 |
int *access_index, target_ulong address, int rw, |
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int is_user)
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{ |
374 |
if (rw == 2) |
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return get_physical_address_code(env, physical, prot, access_index, address, rw, is_user);
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else
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return get_physical_address_data(env, physical, prot, access_index, address, rw, is_user);
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} |
379 |
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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) |
383 |
{ |
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target_ulong virt_addr; |
385 |
target_phys_addr_t paddr; |
386 |
unsigned long vaddr; |
387 |
int error_code = 0, prot, ret = 0, access_index; |
388 |
|
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error_code = get_physical_address(env, &paddr, &prot, &access_index, address, rw, is_user); |
390 |
if (error_code == 0) { |
391 |
virt_addr = address & TARGET_PAGE_MASK; |
392 |
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); |
394 |
return ret;
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} |
396 |
// XXX
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return 1; |
398 |
} |
399 |
|
400 |
#endif
|
401 |
#endif
|
402 |
|
403 |
void memcpy32(target_ulong *dst, const target_ulong *src) |
404 |
{ |
405 |
dst[0] = src[0]; |
406 |
dst[1] = src[1]; |
407 |
dst[2] = src[2]; |
408 |
dst[3] = src[3]; |
409 |
dst[4] = src[4]; |
410 |
dst[5] = src[5]; |
411 |
dst[6] = src[6]; |
412 |
dst[7] = src[7]; |
413 |
} |
414 |
|
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void set_cwp(int new_cwp) |
416 |
{ |
417 |
/* put the modified wrap registers at their proper location */
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418 |
if (env->cwp == (NWINDOWS - 1)) |
419 |
memcpy32(env->regbase, env->regbase + NWINDOWS * 16);
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420 |
env->cwp = new_cwp; |
421 |
/* put the wrap registers at their temporary location */
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422 |
if (new_cwp == (NWINDOWS - 1)) |
423 |
memcpy32(env->regbase + NWINDOWS * 16, env->regbase);
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424 |
env->regwptr = env->regbase + (new_cwp * 16);
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425 |
REGWPTR = env->regwptr; |
426 |
} |
427 |
|
428 |
void cpu_set_cwp(CPUState *env1, int new_cwp) |
429 |
{ |
430 |
CPUState *saved_env; |
431 |
#ifdef reg_REGWPTR
|
432 |
target_ulong *saved_regwptr; |
433 |
#endif
|
434 |
|
435 |
saved_env = env; |
436 |
#ifdef reg_REGWPTR
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437 |
saved_regwptr = REGWPTR; |
438 |
#endif
|
439 |
env = env1; |
440 |
set_cwp(new_cwp); |
441 |
env = saved_env; |
442 |
#ifdef reg_REGWPTR
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443 |
REGWPTR = saved_regwptr; |
444 |
#endif
|
445 |
} |
446 |
|
447 |
#ifdef TARGET_SPARC64
|
448 |
void do_interrupt(int intno) |
449 |
{ |
450 |
#ifdef DEBUG_PCALL
|
451 |
if (loglevel & CPU_LOG_INT) {
|
452 |
static int count; |
453 |
fprintf(logfile, "%6d: v=%02x pc=%08x npc=%08x SP=%08x\n",
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454 |
count, intno, |
455 |
env->pc, |
456 |
env->npc, env->regwptr[6]);
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457 |
cpu_dump_state(env, logfile, fprintf, 0);
|
458 |
#if 0
|
459 |
{
|
460 |
int i;
|
461 |
uint8_t *ptr;
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462 |
|
463 |
fprintf(logfile, " code=");
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464 |
ptr = (uint8_t *)env->pc;
|
465 |
for(i = 0; i < 16; i++) {
|
466 |
fprintf(logfile, " %02x", ldub(ptr + i));
|
467 |
}
|
468 |
fprintf(logfile, "\n");
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469 |
}
|
470 |
#endif
|
471 |
count++; |
472 |
} |
473 |
#endif
|
474 |
#if !defined(CONFIG_USER_ONLY)
|
475 |
if (env->pstate & PS_IE) {
|
476 |
cpu_abort(cpu_single_env, "Trap 0x%02x while interrupts disabled, Error state", env->exception_index);
|
477 |
return;
|
478 |
} |
479 |
#endif
|
480 |
env->tstate[env->tl] = ((uint64_t)GET_CCR(env) << 32) | ((env->asi & 0xff) << 24) | |
481 |
((env->pstate & 0xfff) << 8) | (env->cwp & 0xff); |
482 |
env->tpc[env->tl] = env->pc; |
483 |
env->tnpc[env->tl] = env->npc; |
484 |
env->tt[env->tl] = intno; |
485 |
env->tbr = env->tbr | (env->tl > 1) ? 1 << 14 : 0 | (intno << 4); |
486 |
env->tl++; |
487 |
env->pc = env->tbr; |
488 |
env->npc = env->pc + 4;
|
489 |
env->exception_index = 0;
|
490 |
} |
491 |
#else
|
492 |
void do_interrupt(int intno) |
493 |
{ |
494 |
int cwp;
|
495 |
|
496 |
#ifdef DEBUG_PCALL
|
497 |
if (loglevel & CPU_LOG_INT) {
|
498 |
static int count; |
499 |
fprintf(logfile, "%6d: v=%02x pc=%08x npc=%08x SP=%08x\n",
|
500 |
count, intno, |
501 |
env->pc, |
502 |
env->npc, env->regwptr[6]);
|
503 |
cpu_dump_state(env, logfile, fprintf, 0);
|
504 |
#if 0
|
505 |
{
|
506 |
int i;
|
507 |
uint8_t *ptr;
|
508 |
|
509 |
fprintf(logfile, " code=");
|
510 |
ptr = (uint8_t *)env->pc;
|
511 |
for(i = 0; i < 16; i++) {
|
512 |
fprintf(logfile, " %02x", ldub(ptr + i));
|
513 |
}
|
514 |
fprintf(logfile, "\n");
|
515 |
}
|
516 |
#endif
|
517 |
count++; |
518 |
} |
519 |
#endif
|
520 |
#if !defined(CONFIG_USER_ONLY)
|
521 |
if (env->psret == 0) { |
522 |
cpu_abort(cpu_single_env, "Trap 0x%02x while interrupts disabled, Error state", env->exception_index);
|
523 |
return;
|
524 |
} |
525 |
#endif
|
526 |
env->psret = 0;
|
527 |
cwp = (env->cwp - 1) & (NWINDOWS - 1); |
528 |
set_cwp(cwp); |
529 |
env->regwptr[9] = env->pc;
|
530 |
env->regwptr[10] = env->npc;
|
531 |
env->psrps = env->psrs; |
532 |
env->psrs = 1;
|
533 |
env->tbr = (env->tbr & TBR_BASE_MASK) | (intno << 4);
|
534 |
env->pc = env->tbr; |
535 |
env->npc = env->pc + 4;
|
536 |
env->exception_index = 0;
|
537 |
} |
538 |
|
539 |
target_ulong mmu_probe(target_ulong address, int mmulev)
|
540 |
{ |
541 |
target_phys_addr_t pde_ptr; |
542 |
uint32_t pde; |
543 |
|
544 |
/* Context base + context number */
|
545 |
pde_ptr = (env->mmuregs[1] << 4) + (env->mmuregs[2] << 2); |
546 |
pde = ldl_phys(pde_ptr); |
547 |
|
548 |
switch (pde & PTE_ENTRYTYPE_MASK) {
|
549 |
default:
|
550 |
case 0: /* Invalid */ |
551 |
case 2: /* PTE, maybe should not happen? */ |
552 |
case 3: /* Reserved */ |
553 |
return 0; |
554 |
case 1: /* L1 PDE */ |
555 |
if (mmulev == 3) |
556 |
return pde;
|
557 |
pde_ptr = ((address >> 22) & ~3) + ((pde & ~3) << 4); |
558 |
pde = ldl_phys(pde_ptr); |
559 |
|
560 |
switch (pde & PTE_ENTRYTYPE_MASK) {
|
561 |
default:
|
562 |
case 0: /* Invalid */ |
563 |
case 3: /* Reserved */ |
564 |
return 0; |
565 |
case 2: /* L1 PTE */ |
566 |
return pde;
|
567 |
case 1: /* L2 PDE */ |
568 |
if (mmulev == 2) |
569 |
return pde;
|
570 |
pde_ptr = ((address & 0xfc0000) >> 16) + ((pde & ~3) << 4); |
571 |
pde = ldl_phys(pde_ptr); |
572 |
|
573 |
switch (pde & PTE_ENTRYTYPE_MASK) {
|
574 |
default:
|
575 |
case 0: /* Invalid */ |
576 |
case 3: /* Reserved */ |
577 |
return 0; |
578 |
case 2: /* L2 PTE */ |
579 |
return pde;
|
580 |
case 1: /* L3 PDE */ |
581 |
if (mmulev == 1) |
582 |
return pde;
|
583 |
pde_ptr = ((address & 0x3f000) >> 10) + ((pde & ~3) << 4); |
584 |
pde = ldl_phys(pde_ptr); |
585 |
|
586 |
switch (pde & PTE_ENTRYTYPE_MASK) {
|
587 |
default:
|
588 |
case 0: /* Invalid */ |
589 |
case 1: /* PDE, should not happen */ |
590 |
case 3: /* Reserved */ |
591 |
return 0; |
592 |
case 2: /* L3 PTE */ |
593 |
return pde;
|
594 |
} |
595 |
} |
596 |
} |
597 |
} |
598 |
return 0; |
599 |
} |
600 |
|
601 |
#ifdef DEBUG_MMU
|
602 |
void dump_mmu(void) |
603 |
{ |
604 |
target_ulong va, va1, va2; |
605 |
unsigned int n, m, o; |
606 |
target_phys_addr_t pde_ptr, pa; |
607 |
uint32_t pde; |
608 |
|
609 |
printf("MMU dump:\n");
|
610 |
pde_ptr = (env->mmuregs[1] << 4) + (env->mmuregs[2] << 2); |
611 |
pde = ldl_phys(pde_ptr); |
612 |
printf("Root ptr: " TARGET_FMT_lx ", ctx: %d\n", env->mmuregs[1] << 4, env->mmuregs[2]); |
613 |
for (n = 0, va = 0; n < 256; n++, va += 16 * 1024 * 1024) { |
614 |
pde_ptr = mmu_probe(va, 2);
|
615 |
if (pde_ptr) {
|
616 |
pa = cpu_get_phys_page_debug(env, va); |
617 |
printf("VA: " TARGET_FMT_lx ", PA: " TARGET_FMT_lx " PDE: " TARGET_FMT_lx "\n", va, pa, pde_ptr); |
618 |
for (m = 0, va1 = va; m < 64; m++, va1 += 256 * 1024) { |
619 |
pde_ptr = mmu_probe(va1, 1);
|
620 |
if (pde_ptr) {
|
621 |
pa = cpu_get_phys_page_debug(env, va1); |
622 |
printf(" VA: " TARGET_FMT_lx ", PA: " TARGET_FMT_lx " PDE: " TARGET_FMT_lx "\n", va1, pa, pde_ptr); |
623 |
for (o = 0, va2 = va1; o < 64; o++, va2 += 4 * 1024) { |
624 |
pde_ptr = mmu_probe(va2, 0);
|
625 |
if (pde_ptr) {
|
626 |
pa = cpu_get_phys_page_debug(env, va2); |
627 |
printf(" VA: " TARGET_FMT_lx ", PA: " TARGET_FMT_lx " PTE: " TARGET_FMT_lx "\n", va2, pa, pde_ptr); |
628 |
} |
629 |
} |
630 |
} |
631 |
} |
632 |
} |
633 |
} |
634 |
printf("MMU dump ends\n");
|
635 |
} |
636 |
#endif
|
637 |
#endif
|