| 38,7 → 38,7 |
|---|
| #include <byteorder.h> |
| #include <bitops.h> |
| |
| static volatile uint32_t *pic; |
| static volatile uint32_t *pic = NULL; |
| |
| void pic_init(uintptr_t base, size_t size) |
| { |
| 47,9 → 47,10 |
|---|
| |
| void pic_enable_interrupt(int intnum) |
| { |
| if (intnum < 32) { |
| if (pic) { |
| if (intnum < 32) |
| pic[PIC_MASK_LOW] = pic[PIC_MASK_LOW] | (1 << intnum); |
| } else { |
| else |
| pic[PIC_MASK_HIGH] = pic[PIC_MASK_HIGH] | (1 << (intnum - 32)); |
| } |
| |
| 57,9 → 58,10 |
|---|
| |
| void pic_disable_interrupt(int intnum) |
| { |
| if (intnum < 32) { |
| if (pic) { |
| if (intnum < 32) |
| pic[PIC_MASK_LOW] = pic[PIC_MASK_LOW] & (~(1 << intnum)); |
| } else { |
| else |
| pic[PIC_MASK_HIGH] = pic[PIC_MASK_HIGH] & (~(1 << (intnum - 32))); |
| } |
| } |
| 66,15 → 68,18 |
|---|
| |
| void pic_ack_interrupt(int intnum) |
| { |
| if (pic) { |
| if (intnum < 32) |
| pic[PIC_ACK_LOW] = 1 << intnum; |
| else |
| pic[PIC_ACK_HIGH] = 1 << (intnum - 32); |
| } |
| } |
| |
| /** Return number of pending interrupt */ |
| int pic_get_pending(void) |
| { |
| if (pic) { |
| int pending; |
| |
| pending = pic[PIC_PENDING_LOW]; |
| 84,6 → 89,7 |
|---|
| pending = pic[PIC_PENDING_HIGH]; |
| if (pending) |
| return fnzb32(pending) + 32; |
| } |
| |
| return -1; |
| } |