diff options
Diffstat (limited to 'qemu/target-alpha/mem_helper.c')
| -rw-r--r-- | qemu/target-alpha/mem_helper.c | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/qemu/target-alpha/mem_helper.c b/qemu/target-alpha/mem_helper.c new file mode 100644 index 000000000..7b5e30ddb --- /dev/null +++ b/qemu/target-alpha/mem_helper.c @@ -0,0 +1,159 @@ +/* + * Helpers for loads and stores + * + * Copyright (c) 2007 Jocelyn Mayer + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, see <http://www.gnu.org/licenses/>. + */ + +#include "cpu.h" +#include "exec/helper-proto.h" +#include "exec/cpu_ldst.h" + +/* Softmmu support */ +#ifndef CONFIG_USER_ONLY + +uint64_t helper_ldl_phys(CPUAlphaState *env, uint64_t p) +{ + CPUState *cs = CPU(alpha_env_get_cpu(env)); + return (int32_t)ldl_phys(cs->as, p); +} + +uint64_t helper_ldq_phys(CPUAlphaState *env, uint64_t p) +{ + CPUState *cs = CPU(alpha_env_get_cpu(env)); + return ldq_phys(cs->as, p); +} + +uint64_t helper_ldl_l_phys(CPUAlphaState *env, uint64_t p) +{ + CPUState *cs = CPU(alpha_env_get_cpu(env)); + env->lock_addr = p; + return env->lock_value = (int32_t)ldl_phys(cs->as, p); +} + +uint64_t helper_ldq_l_phys(CPUAlphaState *env, uint64_t p) +{ + CPUState *cs = CPU(alpha_env_get_cpu(env)); + env->lock_addr = p; + return env->lock_value = ldq_phys(cs->as, p); +} + +void helper_stl_phys(CPUAlphaState *env, uint64_t p, uint64_t v) +{ + CPUState *cs = CPU(alpha_env_get_cpu(env)); + stl_phys(cs->as, p, v); +} + +void helper_stq_phys(CPUAlphaState *env, uint64_t p, uint64_t v) +{ + CPUState *cs = CPU(alpha_env_get_cpu(env)); + stq_phys(cs->as, p, v); +} + +uint64_t helper_stl_c_phys(CPUAlphaState *env, uint64_t p, uint64_t v) +{ + CPUState *cs = CPU(alpha_env_get_cpu(env)); + uint64_t ret = 0; + + if (p == env->lock_addr) { + int32_t old = ldl_phys(cs->as, p); + if (old == (int32_t)env->lock_value) { + stl_phys(cs->as, p, v); + ret = 1; + } + } + env->lock_addr = -1; + + return ret; +} + +uint64_t helper_stq_c_phys(CPUAlphaState *env, uint64_t p, uint64_t v) +{ + CPUState *cs = CPU(alpha_env_get_cpu(env)); + uint64_t ret = 0; + + if (p == env->lock_addr) { + uint64_t old = ldq_phys(cs->as, p); + if (old == env->lock_value) { + stq_phys(cs->as, p, v); + ret = 1; + } + } + env->lock_addr = -1; + + return ret; +} + +void alpha_cpu_do_unaligned_access(CPUState *cs, vaddr addr, + int is_write, int is_user, uintptr_t retaddr) +{ + AlphaCPU *cpu = ALPHA_CPU(cs); + CPUAlphaState *env = &cpu->env; + uint64_t pc; + uint32_t insn; + + if (retaddr) { + cpu_restore_state(cs, retaddr); + } + + pc = env->pc; + insn = cpu_ldl_code(env, pc); + + env->trap_arg0 = addr; + env->trap_arg1 = insn >> 26; /* opcode */ + env->trap_arg2 = (insn >> 21) & 31; /* dest regno */ + cs->exception_index = EXCP_UNALIGN; + env->error_code = 0; + cpu_loop_exit(cs); +} + +void alpha_cpu_unassigned_access(CPUState *cs, hwaddr addr, + bool is_write, bool is_exec, int unused, + unsigned size) +{ + AlphaCPU *cpu = ALPHA_CPU(cs); + CPUAlphaState *env = &cpu->env; + + env->trap_arg0 = addr; + env->trap_arg1 = is_write ? 1 : 0; + cs->exception_index = EXCP_MCHK; + env->error_code = 0; + + /* ??? We should cpu_restore_state to the faulting insn, but this hook + does not have access to the retaddr value from the orignal helper. + It's all moot until the QEMU PALcode grows an MCHK handler. */ + + cpu_loop_exit(cs); +} + +/* try to fill the TLB and return an exception if error. If retaddr is + NULL, it means that the function was called in C code (i.e. not + from generated code or from helper.c) */ +/* XXX: fix it to restore all registers */ +void tlb_fill(CPUState *cs, target_ulong addr, int is_write, + int mmu_idx, uintptr_t retaddr) +{ + int ret; + + ret = alpha_cpu_handle_mmu_fault(cs, addr, is_write, mmu_idx); + if (unlikely(ret != 0)) { + if (retaddr) { + cpu_restore_state(cs, retaddr); + } + /* Exception index and error code are already set */ + cpu_loop_exit(cs); + } +} +#endif /* CONFIG_USER_ONLY */ |