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 28 void 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 cpu_restore_state(cs, retaddr); 38 39 pc = env->pc; 40 insn = cpu_ldl_code(env, pc); 41 42 env->trap_arg0 = addr; 43 env->trap_arg1 = insn >> 26; /* opcode */ 44 env->trap_arg2 = (insn >> 21) & 31; /* dest regno */ 45 cs->exception_index = EXCP_UNALIGN; 46 env->error_code = 0; 47 cpu_loop_exit(cs); 48 } 49 50 void alpha_cpu_do_transaction_failed(CPUState *cs, hwaddr physaddr, 51 vaddr addr, unsigned size, 52 MMUAccessType access_type, 53 int mmu_idx, MemTxAttrs attrs, 54 MemTxResult response, uintptr_t retaddr) 55 { 56 AlphaCPU *cpu = ALPHA_CPU(cs); 57 CPUAlphaState *env = &cpu->env; 58 59 cpu_restore_state(cs, retaddr); 60 61 env->trap_arg0 = addr; 62 env->trap_arg1 = access_type == MMU_DATA_STORE ? 1 : 0; 63 cs->exception_index = EXCP_MCHK; 64 env->error_code = 0; 65 cpu_loop_exit(cs); 66 } 67 68 /* try to fill the TLB and return an exception if error. If retaddr is 69 NULL, it means that the function was called in C code (i.e. not 70 from generated code or from helper.c) */ 71 /* XXX: fix it to restore all registers */ 72 void tlb_fill(CPUState *cs, target_ulong addr, MMUAccessType access_type, 73 int mmu_idx, uintptr_t retaddr) 74 { 75 int ret; 76 77 ret = alpha_cpu_handle_mmu_fault(cs, addr, access_type, mmu_idx); 78 if (unlikely(ret != 0)) { 79 /* Exception index and error code are already set */ 80 cpu_loop_exit_restore(cs, retaddr); 81 } 82 } 83 #endif /* CONFIG_USER_ONLY */ 84