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/*
* Copyright (c) 2012-2014 Bastian Koppelmann C-Lab/University Paderborn
*
* 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 <stdlib.h>
#include "cpu.h"
#include "qemu/host-utils.h"
#include "exec/helper-proto.h"
#include "exec/cpu_ldst.h"
#define SSOV(env, ret, arg, len) do { \
int64_t max_pos = INT##len ##_MAX; \
int64_t max_neg = INT##len ##_MIN; \
if (arg > max_pos) { \
env->PSW_USB_V = (1 << 31); \
env->PSW_USB_SV = (1 << 31); \
ret = (target_ulong)max_pos; \
} else { \
if (arg < max_neg) { \
env->PSW_USB_V = (1 << 31); \
env->PSW_USB_SV = (1 << 31); \
ret = (target_ulong)max_neg; \
} else { \
env->PSW_USB_V = 0; \
ret = (target_ulong)arg; \
} \
} \
env->PSW_USB_AV = arg ^ arg * 2u; \
env->PSW_USB_SAV |= env->PSW_USB_AV; \
} while (0)
target_ulong helper_add_ssov(CPUTriCoreState *env, target_ulong r1,
target_ulong r2)
{
target_ulong ret;
int64_t t1 = sextract64(r1, 0, 32);
int64_t t2 = sextract64(r2, 0, 32);
int64_t result = t1 + t2;
SSOV(env, ret, result, 32);
return ret;
}
target_ulong helper_sub_ssov(CPUTriCoreState *env, target_ulong r1,
target_ulong r2)
{
target_ulong ret;
int64_t t1 = sextract64(r1, 0, 32);
int64_t t2 = sextract64(r2, 0, 32);
int64_t result = t1 - t2;
SSOV(env, ret, result, 32);
return ret;
}
static inline void QEMU_NORETURN do_raise_exception_err(CPUTriCoreState *env,
uint32_t exception,
int error_code,
uintptr_t pc)
{
CPUState *cs = CPU(tricore_env_get_cpu(env));
cs->exception_index = exception;
env->error_code = error_code;
if (pc) {
/* now we have a real cpu fault */
cpu_restore_state(cs, pc);
}
cpu_loop_exit(cs);
}
static inline void QEMU_NORETURN do_raise_exception(CPUTriCoreState *env,
uint32_t exception,
uintptr_t pc)
{
do_raise_exception_err(env, exception, 0, pc);
}
void tlb_fill(CPUState *cs, target_ulong addr, int is_write, int mmu_idx,
uintptr_t retaddr)
{
int ret;
ret = cpu_tricore_handle_mmu_fault(cs, addr, is_write, mmu_idx);
if (ret) {
TriCoreCPU *cpu = TRICORE_CPU(cs);
CPUTriCoreState *env = &cpu->env;
do_raise_exception_err(env, cs->exception_index,
env->error_code, retaddr);
}
}
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