Revision b41a2cd1 hw/i8259.c
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/* debug PIC */ |
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//#define DEBUG_PIC |
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//#define DEBUG_IRQ_LATENCY |
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typedef struct PicState {
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uint8_t last_irr; /* edge detection */ |
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uint8_t irr; /* interrupt request register */ |
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return intno; |
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} |
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void pic_ioport_write(CPUState *env, uint32_t addr, uint32_t val)
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static void pic_ioport_write(void *opaque, uint32_t addr, uint32_t val)
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{
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PicState *s; |
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PicState *s = opaque;
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int priority, cmd, irq; |
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#ifdef DEBUG_PIC |
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printf("pic_write: addr=0x%02x val=0x%02x\n", addr, val);
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#endif |
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s = &pics[addr >> 7]; |
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addr &= 1; |
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if (addr == 0) {
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if (val & 0x10) {
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return ret; |
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} |
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uint32_t pic_ioport_read(CPUState *env, uint32_t addr1)
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static uint32_t pic_ioport_read(void *opaque, uint32_t addr1)
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{
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PicState *s; |
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PicState *s = opaque;
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unsigned int addr; |
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int ret; |
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addr = addr1; |
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s = &pics[addr >> 7]; |
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addr &= 1; |
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if (s->poll) {
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ret = pic_poll_read(s, addr1); |
| ... | ... | |
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void pic_init(void) |
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{
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#if defined (TARGET_I386) || defined (TARGET_PPC) |
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register_ioport_write(0x20, 2, pic_ioport_write, 1); |
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register_ioport_read(0x20, 2, pic_ioport_read, 1); |
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register_ioport_write(0xa0, 2, pic_ioport_write, 1); |
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register_ioport_read(0xa0, 2, pic_ioport_read, 1); |
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#endif |
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register_ioport_write(0x20, 2, 1, pic_ioport_write, &pics[0]); |
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register_ioport_read(0x20, 2, 1, pic_ioport_read, &pics[0]); |
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register_ioport_write(0xa0, 2, 1, pic_ioport_write, &pics[1]); |
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register_ioport_read(0xa0, 2, 1, pic_ioport_read, &pics[1]); |
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} |
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