553e44f906
See ISA, 4.7.1 for details. Physical registers and currently visible window are separate fields in CPUEnv. Only current window is accessible to TCG. On operations that change window base helpers copy current window to and from physical registers. Window overflow check described in 4.7.1.3 is in separate patch. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
134 lines
4.1 KiB
C
134 lines
4.1 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[PS] = 0x1f;
|
|
}
|
|
|
|
static const XtensaConfig core_config[] = {
|
|
{
|
|
.name = "sample-xtensa-core",
|
|
.options = -1,
|
|
.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;
|
|
|
|
}
|
|
}
|