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/*
* MIPS TLB (Translation lookaside buffer) helpers.
*
* Copyright (c) 2004-2005 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 2.1 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/exec-all.h"
#include "internal.h"
static void raise_mmu_exception(CPUMIPSState *env, target_ulong address,
MMUAccessType access_type)
{
CPUState *cs = env_cpu(env);
env->error_code = 0;
if (access_type == MMU_INST_FETCH) {
env->error_code |= EXCP_INST_NOTAVAIL;
}
/* Reference to kernel address from user mode or supervisor mode */
/* Reference to supervisor address from user mode */
if (access_type == MMU_DATA_STORE) {
cs->exception_index = EXCP_AdES;
} else {
cs->exception_index = EXCP_AdEL;
}
/* Raise exception */
if (!(env->hflags & MIPS_HFLAG_DM)) {
env->CP0_BadVAddr = address;
}
}
bool mips_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
MMUAccessType access_type, int mmu_idx,
bool probe, uintptr_t retaddr)
{
MIPSCPU *cpu = MIPS_CPU(cs);
CPUMIPSState *env = &cpu->env;
/* data access */
raise_mmu_exception(env, address, access_type);
do_raise_exception_err(env, cs->exception_index, env->error_code, retaddr);
}
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