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Single mode for PIC i8259, by Bernhard Kauer. 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2575 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
ths 2007-04-01 18:26:11 +00:00
parent 74287114c9
commit 2053152b7f
1 changed files with 6 additions and 3 deletions
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9
hw/i8259.c
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@ -44,6 +44,7 @@ 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 single_mode; /* true if slave pic is not initialized */
uint8_t elcr; /* PIIX edge/trigger selection*/
uint8_t elcr_mask;
PicState2 *pics_state;
@ -278,6 +279,7 @@ static void pic_reset(void *opaque)
s->rotate_on_auto_eoi = 0;
s->special_fully_nested_mode = 0;
s->init4 = 0;
s->single_mode = 0;
/* Note: ELCR is not reset */
}
@ -298,8 +300,7 @@ static void pic_ioport_write(void *opaque, uint32_t addr, uint32_t val)
s->pics_state->irq_request(s->pics_state->irq_request_opaque, 0);
s->init_state = 1;
s->init4 = val & 1;
if (val & 0x02)
hw_error("single mode not supported");
s->single_mode = val & 2;
if (val & 0x08)
hw_error("level sensitive irq not supported");
} else if (val & 0x08) {
@ -356,7 +357,7 @@ static void pic_ioport_write(void *opaque, uint32_t addr, uint32_t val)
break;
case 1:
s->irq_base = val & 0xf8;
s->init_state = 2;
s->init_state = s->single_mode && s->init4 ? 3 : 2;
break;
case 2:
if (s->init4) {
@ -468,6 +469,7 @@ 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->single_mode);
qemu_put_8s(f, &s->elcr);
}
@ -492,6 +494,7 @@ 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->single_mode);
qemu_get_8s(f, &s->elcr);
return 0;
}