See ISA, 4.4.4 for details. Correct (aligned as per ISA) address for unaligned access is generated in case this option is not enabled. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
137 lines
4.3 KiB
C
137 lines
4.3 KiB
C
/*
|
|
* Copyright (c) 2011, Max Filippov, Open Source and Linux Lab.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* * Neither the name of the Open Source and Linux Lab nor the
|
|
* names of its contributors may be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
|
|
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
|
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include "cpu.h"
|
|
#include "exec-all.h"
|
|
#include "gdbstub.h"
|
|
#include "qemu-common.h"
|
|
#include "host-utils.h"
|
|
#if !defined(CONFIG_USER_ONLY)
|
|
#include "hw/loader.h"
|
|
#endif
|
|
|
|
void cpu_reset(CPUXtensaState *env)
|
|
{
|
|
env->exception_taken = 0;
|
|
env->pc = env->config->exception_vector[EXC_RESET];
|
|
env->sregs[LITBASE] &= ~1;
|
|
env->sregs[PS] = 0x1f;
|
|
}
|
|
|
|
static const XtensaConfig core_config[] = {
|
|
{
|
|
.name = "sample-xtensa-core",
|
|
.options = -1 ^
|
|
(XTENSA_OPTION_BIT(XTENSA_OPTION_HW_ALIGNMENT) |
|
|
XTENSA_OPTION_BIT(XTENSA_OPTION_MMU)),
|
|
.nareg = 64,
|
|
.ndepc = 1,
|
|
.excm_level = 16,
|
|
.exception_vector = {
|
|
[EXC_RESET] = 0x5fff8000,
|
|
[EXC_WINDOW_OVERFLOW4] = 0x5fff8400,
|
|
[EXC_WINDOW_UNDERFLOW4] = 0x5fff8440,
|
|
[EXC_WINDOW_OVERFLOW8] = 0x5fff8480,
|
|
[EXC_WINDOW_UNDERFLOW8] = 0x5fff84c0,
|
|
[EXC_WINDOW_OVERFLOW12] = 0x5fff8500,
|
|
[EXC_WINDOW_UNDERFLOW12] = 0x5fff8540,
|
|
[EXC_KERNEL] = 0x5fff861c,
|
|
[EXC_USER] = 0x5fff863c,
|
|
[EXC_DOUBLE] = 0x5fff865c,
|
|
},
|
|
},
|
|
};
|
|
|
|
CPUXtensaState *cpu_xtensa_init(const char *cpu_model)
|
|
{
|
|
static int tcg_inited;
|
|
CPUXtensaState *env;
|
|
const XtensaConfig *config = NULL;
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(core_config); ++i)
|
|
if (strcmp(core_config[i].name, cpu_model) == 0) {
|
|
config = core_config + i;
|
|
break;
|
|
}
|
|
|
|
if (config == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
env = g_malloc0(sizeof(*env));
|
|
env->config = config;
|
|
cpu_exec_init(env);
|
|
|
|
if (!tcg_inited) {
|
|
tcg_inited = 1;
|
|
xtensa_translate_init();
|
|
}
|
|
|
|
qemu_init_vcpu(env);
|
|
return env;
|
|
}
|
|
|
|
|
|
void xtensa_cpu_list(FILE *f, fprintf_function cpu_fprintf)
|
|
{
|
|
int i;
|
|
cpu_fprintf(f, "Available CPUs:\n");
|
|
for (i = 0; i < ARRAY_SIZE(core_config); ++i) {
|
|
cpu_fprintf(f, " %s\n", core_config[i].name);
|
|
}
|
|
}
|
|
|
|
target_phys_addr_t cpu_get_phys_page_debug(CPUState *env, target_ulong addr)
|
|
{
|
|
return addr;
|
|
}
|
|
|
|
void do_interrupt(CPUState *env)
|
|
{
|
|
switch (env->exception_index) {
|
|
case EXC_WINDOW_OVERFLOW4:
|
|
case EXC_WINDOW_UNDERFLOW4:
|
|
case EXC_WINDOW_OVERFLOW8:
|
|
case EXC_WINDOW_UNDERFLOW8:
|
|
case EXC_WINDOW_OVERFLOW12:
|
|
case EXC_WINDOW_UNDERFLOW12:
|
|
case EXC_KERNEL:
|
|
case EXC_USER:
|
|
case EXC_DOUBLE:
|
|
if (env->config->exception_vector[env->exception_index]) {
|
|
env->pc = env->config->exception_vector[env->exception_index];
|
|
env->exception_taken = 1;
|
|
} else {
|
|
qemu_log("%s(pc = %08x) bad exception_index: %d\n",
|
|
__func__, env->pc, env->exception_index);
|
|
}
|
|
break;
|
|
|
|
}
|
|
}
|