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/*
* 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;
dynamic_excp(env, 0, EXCP_MCHK, 0);
}
/* 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 */
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