| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Low level interrupt handler for the SGI O2 aka IP32 aka Moosehead |
| 3 | * |
| 4 | * This file is subject to the terms and conditions of the GNU General Public |
| 5 | * License. See the file "COPYING" in the main directory of this archive |
| 6 | * for more details. |
| 7 | * |
| 8 | * Copyright (C) 2000 Harald Koerfgen |
| 9 | * Copyright (C) 2001 Keith M Wesolowski |
| 10 | */ |
| 11 | #include <asm/asm.h> |
| 12 | #include <asm/regdef.h> |
| 13 | #include <asm/mipsregs.h> |
| 14 | #include <asm/stackframe.h> |
| 15 | #include <asm/addrspace.h> |
| 16 | |
| 17 | .text |
| 18 | .set noreorder |
| 19 | .set noat |
| 20 | .align 5 |
| 21 | NESTED(ip32_handle_int, PT_SIZE, ra) |
| 22 | .set noat |
| 23 | SAVE_ALL |
| 24 | CLI # TEST: interrupts should be off |
| 25 | .set at |
| 26 | .set noreorder |
| 27 | |
| 28 | mfc0 s0,CP0_CAUSE |
| 29 | |
| 30 | andi t1, s0, IE_IRQ0 |
| 31 | bnez t1, handle_irq0 |
| 32 | andi t1, s0, IE_IRQ1 |
| 33 | bnez t1, handle_irq1 |
| 34 | andi t1, s0, IE_IRQ2 |
| 35 | bnez t1, handle_irq2 |
| 36 | andi t1, s0, IE_IRQ3 |
| 37 | bnez t1, handle_irq3 |
| 38 | andi t1, s0, IE_IRQ4 |
| 39 | bnez t1, handle_irq4 |
| 40 | andi t1, s0, IE_IRQ5 |
| 41 | bnez t1, handle_irq5 |
| 42 | nop |
| 43 | |
| 44 | /* Either someone has triggered the "software interrupts" |
| 45 | * or we lost an interrupt somehow. Ignore it. |
| 46 | */ |
| 47 | j ret_from_irq |
| 48 | nop |
| 49 | |
| 50 | handle_irq0: |
| 51 | jal ip32_irq0 |
| 52 | move a0, sp |
| 53 | j ret_from_irq |
| 54 | nop |
| 55 | |
| 56 | handle_irq1: |
| 57 | jal ip32_irq1 |
| 58 | move a0, sp |
| 59 | j ret_from_irq |
| 60 | nop |
| 61 | |
| 62 | handle_irq2: |
| 63 | jal ip32_irq2 |
| 64 | move a0, sp |
| 65 | j ret_from_irq |
| 66 | nop |
| 67 | |
| 68 | handle_irq3: |
| 69 | jal ip32_irq3 |
| 70 | move a0, sp |
| 71 | j ret_from_irq |
| 72 | nop |
| 73 | |
| 74 | handle_irq4: |
| 75 | jal ip32_irq4 |
| 76 | move a0, sp |
| 77 | j ret_from_irq |
| 78 | nop |
| 79 | |
| 80 | handle_irq5: |
| 81 | jal ip32_irq5 |
| 82 | move a0, sp |
| 83 | j ret_from_irq |
| 84 | nop |
| 85 | |
| 86 | END(ip32_handle_int) |