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PIIX ELCR register support 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@820 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2004-05-20 12:41:21 +00:00
parent 69135b5c04
commit 660de33686
1 changed files with 48 additions and 11 deletions
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59
hw/i8259.c
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@ -43,6 +43,8 @@ typedef struct PicState {
uint8_t rotate_on_auto_eoi;
uint8_t special_fully_nested_mode;
uint8_t init4; /* true if 4 byte init */
uint8_t elcr; /* PIIX edge/trigger selection*/
uint8_t elcr_mask;
} PicState;
/* 0 is master pic, 1 is slave pic */
@ -54,12 +56,24 @@ static inline void pic_set_irq1(PicState *s, int irq, int level)
{
int mask;
mask = 1 << irq;
if (level) {
if ((s->last_irr & mask) == 0)
if (s->elcr & mask) {
/* level triggered */
if (level) {
s->irr |= mask;
s->last_irr |= mask;
s->last_irr |= mask;
} else {
s->irr &= ~mask;
s->last_irr &= ~mask;
}
} else {
s->last_irr &= ~mask;
/* edge triggered */
if (level) {
if ((s->last_irr & mask) == 0)
s->irr |= mask;
s->last_irr |= mask;
} else {
s->last_irr &= ~mask;
}
}
}
@ -205,7 +219,7 @@ int cpu_get_pic_interrupt(CPUState *env)
static void pic_ioport_write(void *opaque, uint32_t addr, uint32_t val)
{
PicState *s = opaque;
int priority, cmd, irq;
int priority, cmd, irq, tmp;
#ifdef DEBUG_PIC
printf("pic_write: addr=0x%02x val=0x%02x\n", addr, val);
@ -214,7 +228,10 @@ static void pic_ioport_write(void *opaque, uint32_t addr, uint32_t val)
if (addr == 0) {
if (val & 0x10) {
/* init */
tmp = s->elcr_mask;
memset(s, 0, sizeof(PicState));
s->elcr_mask = tmp;
s->init_state = 1;
s->init4 = val & 1;
if (val & 0x02)
@ -356,6 +373,18 @@ uint32_t pic_intack_read(CPUState *env)
return ret;
}
static void elcr_ioport_write(void *opaque, uint32_t addr, uint32_t val)
{
PicState *s = opaque;
s->elcr = val & s->elcr_mask;
}
static uint32_t elcr_ioport_read(void *opaque, uint32_t addr1)
{
PicState *s = opaque;
return s->elcr;
}
static void pic_save(QEMUFile *f, void *opaque)
{
PicState *s = opaque;
@ -374,6 +403,7 @@ static void pic_save(QEMUFile *f, void *opaque)
qemu_put_8s(f, &s->rotate_on_auto_eoi);
qemu_put_8s(f, &s->special_fully_nested_mode);
qemu_put_8s(f, &s->init4);
qemu_put_8s(f, &s->elcr);
}
static int pic_load(QEMUFile *f, void *opaque, int version_id)
@ -397,15 +427,19 @@ static int pic_load(QEMUFile *f, void *opaque, int version_id)
qemu_get_8s(f, &s->rotate_on_auto_eoi);
qemu_get_8s(f, &s->special_fully_nested_mode);
qemu_get_8s(f, &s->init4);
qemu_get_8s(f, &s->elcr);
return 0;
}
/* XXX: add generic master/slave system */
static void pic_init1(int io_addr, PicState *s)
static void pic_init1(int io_addr, int elcr_addr, PicState *s)
{
register_ioport_write(io_addr, 2, 1, pic_ioport_write, s);
register_ioport_read(io_addr, 2, 1, pic_ioport_read, s);
if (elcr_addr >= 0) {
register_ioport_write(elcr_addr, 1, 1, elcr_ioport_write, s);
register_ioport_read(elcr_addr, 1, 1, elcr_ioport_read, s);
}
register_savevm("i8259", io_addr, 1, pic_save, pic_load, s);
}
@ -416,15 +450,18 @@ void pic_info(void)
for(i=0;i<2;i++) {
s = &pics[i];
term_printf("pic%d: irr=%02x imr=%02x isr=%02x hprio=%d irq_base=%02x rr_sel=%d\n",
i, s->irr, s->imr, s->isr, s->priority_add, s->irq_base, s->read_reg_select);
term_printf("pic%d: irr=%02x imr=%02x isr=%02x hprio=%d irq_base=%02x rr_sel=%d elcr=%02x\n",
i, s->irr, s->imr, s->isr, s->priority_add,
s->irq_base, s->read_reg_select, s->elcr);
}
}
void pic_init(void)
{
pic_init1(0x20, &pics[0]);
pic_init1(0xa0, &pics[1]);
pic_init1(0x20, 0x4d0, &pics[0]);
pic_init1(0xa0, 0x4d1, &pics[1]);
pics[0].elcr_mask = 0xf8;
pics[1].elcr_mask = 0xde;
}