mem_helper.c (2575B)
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 */