diff options
Diffstat (limited to 'hw/i8259.c')
| -rw-r--r-- | hw/i8259.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/hw/i8259.c b/hw/i8259.c index 88702778f4..dc13b1248c 100644 --- a/hw/i8259.c +++ b/hw/i8259.c @@ -59,7 +59,7 @@ typedef struct PicState { uint8_t elcr; /* PIIX edge/trigger selection*/ uint8_t elcr_mask; qemu_irq int_out; - PicState2 *pics_state; + bool master; /* reflects /SP input pin */ MemoryRegion base_io; MemoryRegion elcr_io; } PicState; @@ -107,8 +107,9 @@ static int pic_get_irq(PicState *s) mask = s->isr; if (s->special_mask) mask &= ~s->imr; - if (s->special_fully_nested_mode && s == &s->pics_state->pics[0]) + if (s->special_fully_nested_mode && s->master) { mask &= ~(1 << 2); + } cur_priority = get_priority(s, mask); if (priority < cur_priority) { /* higher priority found: an irq should be generated */ @@ -126,8 +127,7 @@ static void pic_update_irq(PicState *s) irq = pic_get_irq(s); if (irq >= 0) { DPRINTF("pic%d: imr=%x irr=%x padd=%d\n", - s == &s->pics_state->pics[0] ? 0 : 1, s->imr, s->irr, - s->priority_add); + s->master ? 0 : 1, s->imr, s->irr, s->priority_add); qemu_irq_raise(s->int_out); } else { qemu_irq_lower(s->int_out); @@ -454,9 +454,11 @@ static const MemoryRegionOps pic_elcr_ioport_ops = { }; /* XXX: add generic master/slave system */ -static void pic_init(int io_addr, int elcr_addr, PicState *s, qemu_irq int_out) +static void pic_init(int io_addr, int elcr_addr, PicState *s, qemu_irq int_out, + bool master) { s->int_out = int_out; + s->master = master; memory_region_init_io(&s->base_io, &pic_base_ioport_ops, s, "pic", 2); memory_region_init_io(&s->elcr_io, &pic_elcr_ioport_ops, s, "elcr", 1); @@ -512,12 +514,10 @@ qemu_irq *i8259_init(qemu_irq parent_irq) s = g_malloc0(sizeof(PicState2)); irqs = qemu_allocate_irqs(i8259_set_irq, s, 16); - pic_init(0x20, 0x4d0, &s->pics[0], parent_irq); - pic_init(0xa0, 0x4d1, &s->pics[1], irqs[2]); + pic_init(0x20, 0x4d0, &s->pics[0], parent_irq, true); + pic_init(0xa0, 0x4d1, &s->pics[1], irqs[2], false); s->pics[0].elcr_mask = 0xf8; s->pics[1].elcr_mask = 0xde; - s->pics[0].pics_state = s; - s->pics[1].pics_state = s; isa_pic = s; return irqs; } |