| 1 | #if defined (__x86_64__) || defined (__i386__) |
| 2 | |
| 3 | #include <stddef.h> |
| 4 | #include <stdint.h> |
| 5 | #include <stdbool.h> |
| 6 | #include <sys/pic.h> |
| 7 | #include <sys/cpu.h> |
| 8 | #include <lib/misc.h> |
| 9 | |
| 10 | void pic_eoi(int irq) { |
| 11 | if (irq >= 8) { |
| 12 | outb(0xa0, 0x20); |
| 13 | } |
| 14 | |
| 15 | outb(0x20, 0x20); |
| 16 | } |
| 17 | |
| 18 | // Flush all potentially pending IRQs |
| 19 | void pic_flush(void) { |
| 20 | for (int i = 0; i < 16; i++) |
| 21 | pic_eoi(i); |
| 22 | } |
| 23 | |
| 24 | void pic_set_mask(int line, bool status) { |
| 25 | uint16_t port; |
| 26 | uint8_t value; |
| 27 | |
| 28 | if (line < 8) { |
| 29 | port = 0x21; |
| 30 | } else { |
| 31 | port = 0xa1; |
| 32 | line -= 8; |
| 33 | } |
| 34 | |
| 35 | if (!status) |
| 36 | value = inb(port) & ~((uint8_t)1 << line); |
| 37 | else |
| 38 | value = inb(port) | ((uint8_t)1 << line); |
| 39 | |
| 40 | outb(port, value); |
| 41 | } |
| 42 | |
| 43 | void pic_mask_all(void) { |
| 44 | outb(0xa1, 0xff); |
| 45 | outb(0x21, 0xff); |
| 46 | } |
| 47 | |
| 48 | #endif |
