LXR qemu/target/alpha/mem

   1/*
   2 *  Helpers for loads and stores
   3 *
   4 *  Copyright (c) 2007 Jocelyn Mayer
   5 *
   6 * This library is free software; you can redistribute it and/or
   7 * modify it under the terms of the GNU Lesser General Public
   8 * License as published by the Free Software Foundation; either
   9 * version 2 of the License, or (at your option) any later version.
  10 *
  11 * This library is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 * Lesser General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU Lesser General Public
  17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20#include "qemu/osdep.h"
  21#include "cpu.h"
  22#include "exec/helper-proto.h"
  23#include "exec/exec-all.h"
  24#include "exec/cpu_ldst.h"
  25
  26/* Softmmu support */
  27#ifndef CONFIG_USER_ONLY
  28void alpha_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
  29                                   MMUAccessType access_type,
  30                                   int mmu_idx, uintptr_t retaddr)
  31{
  32    AlphaCPU *cpu = ALPHA_CPU(cs);
  33    CPUAlphaState *env = &cpu->env;
  34    uint64_t pc;
  35    uint32_t insn;
  36
  37    if (retaddr) {
  38        cpu_restore_state(cs, retaddr);
  39    }
  40
  41    pc = env->pc;
  42    insn = cpu_ldl_code(env, pc);
  43
  44    env->trap_arg0 = addr;
  45    env->trap_arg1 = insn >> 26;                /* opcode */
  46    env->trap_arg2 = (insn >> 21) & 31;         /* dest regno */
  47    cs->exception_index = EXCP_UNALIGN;
  48    env->error_code = 0;
  49    cpu_loop_exit(cs);
  50}
  51
  52void alpha_cpu_do_transaction_failed(CPUState *cs, hwaddr physaddr,
  53                                     vaddr addr, unsigned size,
  54                                     MMUAccessType access_type,
  55                                     int mmu_idx, MemTxAttrs attrs,
  56                                     MemTxResult response, uintptr_t retaddr)
  57{
  58    AlphaCPU *cpu = ALPHA_CPU(cs);
  59    CPUAlphaState *env = &cpu->env;
  60
  61    if (retaddr) {
  62        cpu_restore_state(cs, retaddr);
  63    }
  64
  65    env->trap_arg0 = addr;
  66    env->trap_arg1 = access_type == MMU_DATA_STORE ? 1 : 0;
  67    cs->exception_index = EXCP_MCHK;
  68    env->error_code = 0;
  69    cpu_loop_exit(cs);
  70}
  71
  72/* try to fill the TLB and return an exception if error. If retaddr is
  73   NULL, it means that the function was called in C code (i.e. not
  74   from generated code or from helper.c) */
  75/* XXX: fix it to restore all registers */
  76void tlb_fill(CPUState *cs, target_ulong addr, MMUAccessType access_type,
  77              int mmu_idx, uintptr_t retaddr)
  78{
  79    int ret;
  80
  81    ret = alpha_cpu_handle_mmu_fault(cs, addr, access_type, mmu_idx);
  82    if (unlikely(ret != 0)) {
  83        if (retaddr) {
  84            cpu_restore_state(cs, retaddr);
  85        }
  86        /* Exception index and error code are already set */
  87        cpu_loop_exit(cs);
  88    }
  89}
  90#endif /* CONFIG_USER_ONLY */
  91