90 lines
2.8 KiB
C
90 lines
2.8 KiB
C
/*
|
|
* 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 "qemu/osdep.h"
|
|
#include "cpu.h"
|
|
#include "exec/helper-proto.h"
|
|
#include "exec/exec-all.h"
|
|
#include "exec/cpu_ldst.h"
|
|
|
|
/* Softmmu support */
|
|
#ifndef CONFIG_USER_ONLY
|
|
void alpha_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
|
|
MMUAccessType access_type,
|
|
int mmu_idx, 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 original 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, MMUAccessType access_type,
|
|
int mmu_idx, uintptr_t retaddr)
|
|
{
|
|
int ret;
|
|
|
|
ret = alpha_cpu_handle_mmu_fault(cs, addr, access_type, 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 */
|