| 49,28 → 49,28 |
|---|
| void i8259_init(void) |
| { |
| /* ICW1: this is ICW1, ICW4 to follow */ |
| outb(PIC_PIC0PORT1, PIC_ICW1 | PIC_NEEDICW4); |
| pio_write_8(PIC_PIC0PORT1, PIC_ICW1 | PIC_NEEDICW4); |
| |
| /* ICW2: IRQ 0 maps to INT IRQBASE */ |
| outb(PIC_PIC0PORT2, IVT_IRQBASE); |
| pio_write_8(PIC_PIC0PORT2, IVT_IRQBASE); |
| |
| /* ICW3: pic1 using IRQ IRQ_PIC1 */ |
| outb(PIC_PIC0PORT2, 1 << IRQ_PIC1); |
| pio_write_8(PIC_PIC0PORT2, 1 << IRQ_PIC1); |
| |
| /* ICW4: i8086 mode */ |
| outb(PIC_PIC0PORT2, 1); |
| pio_write_8(PIC_PIC0PORT2, 1); |
| |
| /* ICW1: ICW1, ICW4 to follow */ |
| outb(PIC_PIC1PORT1, PIC_ICW1 | PIC_NEEDICW4); |
| pio_write_8(PIC_PIC1PORT1, PIC_ICW1 | PIC_NEEDICW4); |
| |
| /* ICW2: IRQ 8 maps to INT (IVT_IRQBASE + 8) */ |
| outb(PIC_PIC1PORT2, IVT_IRQBASE + 8); |
| pio_write_8(PIC_PIC1PORT2, IVT_IRQBASE + 8); |
| |
| /* ICW3: pic1 is known as IRQ_PIC1 */ |
| outb(PIC_PIC1PORT2, IRQ_PIC1); |
| pio_write_8(PIC_PIC1PORT2, IRQ_PIC1); |
| |
| /* ICW4: i8086 mode */ |
| outb(PIC_PIC1PORT2, 1); |
| pio_write_8(PIC_PIC1PORT2, 1); |
| |
| /* |
| * Register interrupt handler for the PIC spurious interrupt. |
| 94,12 → 94,12 |
|---|
| uint8_t x; |
| |
| if (irqmask & 0xff) { |
| x = inb(PIC_PIC0PORT2); |
| outb(PIC_PIC0PORT2, (uint8_t) (x & (~(irqmask & 0xff)))); |
| x = pio_read_8(PIC_PIC0PORT2); |
| pio_write_8(PIC_PIC0PORT2, (uint8_t) (x & (~(irqmask & 0xff)))); |
| } |
| if (irqmask >> 8) { |
| x = inb(PIC_PIC1PORT2); |
| outb(PIC_PIC1PORT2, (uint8_t) (x & (~(irqmask >> 8)))); |
| x = pio_read_8(PIC_PIC1PORT2); |
| pio_write_8(PIC_PIC1PORT2, (uint8_t) (x & (~(irqmask >> 8)))); |
| } |
| } |
| |
| 108,19 → 108,19 |
|---|
| uint8_t x; |
| |
| if (irqmask & 0xff) { |
| x = inb(PIC_PIC0PORT2); |
| outb(PIC_PIC0PORT2, (uint8_t) (x | (irqmask & 0xff))); |
| x = pio_read_8(PIC_PIC0PORT2); |
| pio_write_8(PIC_PIC0PORT2, (uint8_t) (x | (irqmask & 0xff))); |
| } |
| if (irqmask >> 8) { |
| x = inb(PIC_PIC1PORT2); |
| outb(PIC_PIC1PORT2, (uint8_t) (x | (irqmask >> 8))); |
| x = pio_read_8(PIC_PIC1PORT2); |
| pio_write_8(PIC_PIC1PORT2, (uint8_t) (x | (irqmask >> 8))); |
| } |
| } |
| |
| void pic_eoi(void) |
| { |
| outb(0x20, 0x20); |
| outb(0xa0, 0x20); |
| pio_write_8(0x20, 0x20); |
| pio_write_8(0xa0, 0x20); |
| } |
| |
| void pic_spurious(int n __attribute__((unused)), istate_t *istate __attribute__((unused))) |