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 "accel/tcg/cpu-ldst.h" 24 25 static void do_unaligned_access(CPUAlphaState *env, vaddr addr, uintptr_t retaddr) 26 { 27 uint64_t pc; 28 uint32_t insn; 29 30 cpu_restore_state(env_cpu(env), retaddr); 31 32 pc = env->pc; 33 insn = cpu_ldl_code(env, pc); 34 35 env->trap_arg0 = addr; 36 env->trap_arg1 = insn >> 26; /* opcode */ 37 env->trap_arg2 = (insn >> 21) & 31; /* dest regno */ 38 } 39 40 #ifdef CONFIG_USER_ONLY 41 void alpha_cpu_record_sigbus(CPUState *cs, vaddr addr, 42 MMUAccessType access_type, uintptr_t retaddr) 43 { 44 do_unaligned_access(cpu_env(cs), addr, retaddr); 45 } 46 #else 47 void alpha_cpu_do_unaligned_access(CPUState *cs, vaddr addr, 48 MMUAccessType access_type, 49 int mmu_idx, uintptr_t retaddr) 50 { 51 CPUAlphaState *env = cpu_env(cs); 52 53 do_unaligned_access(env, addr, retaddr); 54 cs->exception_index = EXCP_UNALIGN; 55 env->error_code = 0; 56 cpu_loop_exit(cs); 57 } 58 59 void alpha_cpu_do_transaction_failed(CPUState *cs, hwaddr physaddr, 60 vaddr addr, unsigned size, 61 MMUAccessType access_type, 62 int mmu_idx, MemTxAttrs attrs, 63 MemTxResult response, uintptr_t retaddr) 64 { 65 CPUAlphaState *env = cpu_env(cs); 66 67 env->trap_arg0 = addr; 68 env->trap_arg1 = access_type == MMU_DATA_STORE ? 1 : 0; 69 cs->exception_index = EXCP_MCHK; 70 env->error_code = 0; 71 cpu_loop_exit_restore(cs, retaddr); 72 } 73 #endif /* CONFIG_USER_ONLY */ 74