diff options
author | Yang Zhang <yang.z.zhang@intel.com> | 2015-08-28 09:58:54 +0800 |
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committer | Yang Zhang <yang.z.zhang@intel.com> | 2015-09-01 12:44:00 +0800 |
commit | e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb (patch) | |
tree | 66b09f592c55df2878107a468a91d21506104d3f /qemu/target-i386/mem_helper.c | |
parent | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (diff) |
Add qemu 2.4.0
Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Diffstat (limited to 'qemu/target-i386/mem_helper.c')
-rw-r--r-- | qemu/target-i386/mem_helper.c | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/qemu/target-i386/mem_helper.c b/qemu/target-i386/mem_helper.c new file mode 100644 index 000000000..1aec8a5f1 --- /dev/null +++ b/qemu/target-i386/mem_helper.c @@ -0,0 +1,132 @@ +/* + * x86 memory access helpers + * + * Copyright (c) 2003 Fabrice Bellard + * + * 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" + +/* broken thread support */ + +static spinlock_t global_cpu_lock = SPIN_LOCK_UNLOCKED; + +void helper_lock(void) +{ + spin_lock(&global_cpu_lock); +} + +void helper_unlock(void) +{ + spin_unlock(&global_cpu_lock); +} + +void helper_cmpxchg8b(CPUX86State *env, target_ulong a0) +{ + uint64_t d; + int eflags; + + eflags = cpu_cc_compute_all(env, CC_OP); + d = cpu_ldq_data(env, a0); + if (d == (((uint64_t)env->regs[R_EDX] << 32) | (uint32_t)env->regs[R_EAX])) { + cpu_stq_data(env, a0, ((uint64_t)env->regs[R_ECX] << 32) | (uint32_t)env->regs[R_EBX]); + eflags |= CC_Z; + } else { + /* always do the store */ + cpu_stq_data(env, a0, d); + env->regs[R_EDX] = (uint32_t)(d >> 32); + env->regs[R_EAX] = (uint32_t)d; + eflags &= ~CC_Z; + } + CC_SRC = eflags; +} + +#ifdef TARGET_X86_64 +void helper_cmpxchg16b(CPUX86State *env, target_ulong a0) +{ + uint64_t d0, d1; + int eflags; + + if ((a0 & 0xf) != 0) { + raise_exception(env, EXCP0D_GPF); + } + eflags = cpu_cc_compute_all(env, CC_OP); + d0 = cpu_ldq_data(env, a0); + d1 = cpu_ldq_data(env, a0 + 8); + if (d0 == env->regs[R_EAX] && d1 == env->regs[R_EDX]) { + cpu_stq_data(env, a0, env->regs[R_EBX]); + cpu_stq_data(env, a0 + 8, env->regs[R_ECX]); + eflags |= CC_Z; + } else { + /* always do the store */ + cpu_stq_data(env, a0, d0); + cpu_stq_data(env, a0 + 8, d1); + env->regs[R_EDX] = d1; + env->regs[R_EAX] = d0; + eflags &= ~CC_Z; + } + CC_SRC = eflags; +} +#endif + +void helper_boundw(CPUX86State *env, target_ulong a0, int v) +{ + int low, high; + + low = cpu_ldsw_data(env, a0); + high = cpu_ldsw_data(env, a0 + 2); + v = (int16_t)v; + if (v < low || v > high) { + raise_exception(env, EXCP05_BOUND); + } +} + +void helper_boundl(CPUX86State *env, target_ulong a0, int v) +{ + int low, high; + + low = cpu_ldl_data(env, a0); + high = cpu_ldl_data(env, a0 + 4); + if (v < low || v > high) { + raise_exception(env, EXCP05_BOUND); + } +} + +#if !defined(CONFIG_USER_ONLY) +/* 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 = x86_cpu_handle_mmu_fault(cs, addr, is_write, mmu_idx); + if (ret) { + X86CPU *cpu = X86_CPU(cs); + CPUX86State *env = &cpu->env; + + if (retaddr) { + /* now we have a real cpu fault */ + cpu_restore_state(cs, retaddr); + } + raise_exception_err(env, cs->exception_index, env->error_code); + } +} +#endif |