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 2.1 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
  26static void do_unaligned_access(CPUAlphaState *env, vaddr addr, uintptr_t retaddr)
  27{
  28    uint64_t pc;
  29    uint32_t insn;
  30
  31    cpu_restore_state(env_cpu(env), retaddr, true);
  32
  33    pc = env->pc;
  34    insn = cpu_ldl_code(env, pc);
  35
  36    env->trap_arg0 = addr;
  37    env->trap_arg1 = insn >> 26;                /* opcode */
  38    env->trap_arg2 = (insn >> 21) & 31;         /* dest regno */
  39}
  40
  41#ifdef CONFIG_USER_ONLY
  42void alpha_cpu_record_sigbus(CPUState *cs, vaddr addr,
  43                             MMUAccessType access_type, uintptr_t retaddr)
  44{
  45    AlphaCPU *cpu = ALPHA_CPU(cs);
  46    CPUAlphaState *env = &cpu->env;
  47
  48    do_unaligned_access(env, addr, retaddr);
  49}
  50#else
  51void alpha_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
  52                                   MMUAccessType access_type,
  53                                   int mmu_idx, uintptr_t retaddr)
  54{
  55    AlphaCPU *cpu = ALPHA_CPU(cs);
  56    CPUAlphaState *env = &cpu->env;
  57
  58    do_unaligned_access(env, addr, retaddr);
  59    cs->exception_index = EXCP_UNALIGN;
  60    env->error_code = 0;
  61    cpu_loop_exit(cs);
  62}
  63
  64void alpha_cpu_do_transaction_failed(CPUState *cs, hwaddr physaddr,
  65                                     vaddr addr, unsigned size,
  66                                     MMUAccessType access_type,
  67                                     int mmu_idx, MemTxAttrs attrs,
  68                                     MemTxResult response, uintptr_t retaddr)
  69{
  70    AlphaCPU *cpu = ALPHA_CPU(cs);
  71    CPUAlphaState *env = &cpu->env;
  72
  73    env->trap_arg0 = addr;
  74    env->trap_arg1 = access_type == MMU_DATA_STORE ? 1 : 0;
  75    cs->exception_index = EXCP_MCHK;
  76    env->error_code = 0;
  77    cpu_loop_exit_restore(cs, retaddr);
  78}
  79#endif /* CONFIG_USER_ONLY */
  80