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hw/avr/atmega: Fix wrong initial value of stack pointer

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The current implementation initializes the stack pointer of AVR devices
to 0. Although older AVR devices used to be like that, newer ones set
it to RAMEND.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1525
Signed-off-by: Gihun Nam <gihun.nam@outlook.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <PH0P222MB0010877445B594724D40C924DEBDA@PH0P222MB0010.NAMP222.PROD.OUTLOOK.COM>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
(cherry picked from commit 235948bf53)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
This commit is contained in:
Gihun Nam 2023-11-27 11:54:20 +09:00 committed by Michael Tokarev
parent fbca2cbbef
commit 66f14b70fe
3 changed files with 16 additions and 1 deletions
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4
hw/avr/atmega.c
View File

@ -233,6 +233,10 @@ static void atmega_realize(DeviceState *dev, Error **errp)
/* CPU */
object_initialize_child(OBJECT(dev), "cpu", &s->cpu, mc->cpu_type);
object_property_set_uint(OBJECT(&s->cpu), "init-sp",
mc->io_size + mc->sram_size - 1, &error_abort);
qdev_realize(DEVICE(&s->cpu), NULL, &error_abort);
cpudev = DEVICE(&s->cpu);

10
target/avr/cpu.c
View File

@ -25,6 +25,7 @@
#include "cpu.h"
#include "disas/dis-asm.h"
#include "tcg/debug-assert.h"
#include "hw/qdev-properties.h"
static void avr_cpu_set_pc(CPUState *cs, vaddr value)
{
@ -95,7 +96,7 @@ static void avr_cpu_reset_hold(Object *obj)
env->rampY = 0;
env->rampZ = 0;
env->eind = 0;
env->sp = 0;
env->sp = cpu->init_sp;
env->skip = 0;
@ -154,6 +155,11 @@ static void avr_cpu_initfn(Object *obj)
sizeof(cpu->env.intsrc) * 8);
}
static Property avr_cpu_properties[] = {
DEFINE_PROP_UINT32("init-sp", AVRCPU, init_sp, 0),
DEFINE_PROP_END_OF_LIST()
};
static ObjectClass *avr_cpu_class_by_name(const char *cpu_model)
{
ObjectClass *oc;
@ -231,6 +237,8 @@ static void avr_cpu_class_init(ObjectClass *oc, void *data)
device_class_set_parent_realize(dc, avr_cpu_realizefn, &mcc->parent_realize);
device_class_set_props(dc, avr_cpu_properties);
resettable_class_set_parent_phases(rc, NULL, avr_cpu_reset_hold, NULL,
&mcc->parent_phases);

3
target/avr/cpu.h
View File

@ -150,6 +150,9 @@ struct ArchCPU {
CPUNegativeOffsetState neg;
CPUAVRState env;
/* Initial value of stack pointer */
uint32_t init_sp;
};
extern const struct VMStateDescription vms_avr_cpu;