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/*
* 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;
}
}
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