target/alpha/mem_helper.c

   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
  26 static 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);
  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
  42 void 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
  51 void 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
  64 void 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 */