| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2001 MontaVista Software Inc. |
| 3 | * Author: ppopov@mvista.com |
| 4 | * |
| 5 | * Interrupt dispatcher for Au1000 boards. |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify it |
| 8 | * under the terms of the GNU General Public License as published by the |
| 9 | * Free Software Foundation; either version 2 of the License, or (at your |
| 10 | * option) any later version. |
| 11 | */ |
| 12 | #include <asm/asm.h> |
| 13 | #include <asm/mipsregs.h> |
| 14 | #include <asm/addrspace.h> |
| 15 | #include <asm/regdef.h> |
| 16 | #include <asm/stackframe.h> |
| 17 | |
| 18 | .text |
| 19 | .set macro |
| 20 | .set noat |
| 21 | .align 5 |
| 22 | |
| 23 | NESTED(au1000_IRQ, PT_SIZE, sp) |
| 24 | SAVE_ALL |
| 25 | CLI # Important: mark KERNEL mode ! |
| 26 | |
| 27 | mfc0 t0,CP0_CAUSE # get pending interrupts |
| 28 | mfc0 t1,CP0_STATUS # get enabled interrupts |
| 29 | and t0,t1 # isolate allowed ones |
| 30 | |
| 31 | andi t0,0xff00 # isolate pending bits |
| 32 | beqz t0, 3f # spurious interrupt |
| 33 | |
| 34 | andi a0, t0, CAUSEF_IP7 |
| 35 | beq a0, zero, 1f |
| 36 | move a0, sp |
| 37 | jal mips_timer_interrupt |
| 38 | j ret_from_irq |
| 39 | |
| 40 | 1: |
| 41 | andi a0, t0, CAUSEF_IP2 # Interrupt Controller 0, Request 0 |
| 42 | beq a0, zero, 2f |
| 43 | move a0,sp |
| 44 | jal intc0_req0_irqdispatch |
| 45 | j ret_from_irq |
| 46 | 2: |
| 47 | andi a0, t0, CAUSEF_IP3 # Interrupt Controller 0, Request 1 |
| 48 | beq a0, zero, 3f |
| 49 | move a0,sp |
| 50 | jal intc0_req1_irqdispatch |
| 51 | j ret_from_irq |
| 52 | 3: |
| 53 | andi a0, t0, CAUSEF_IP4 # Interrupt Controller 1, Request 0 |
| 54 | beq a0, zero, 4f |
| 55 | move a0,sp |
| 56 | jal intc1_req0_irqdispatch |
| 57 | j ret_from_irq |
| 58 | 4: |
| 59 | andi a0, t0, CAUSEF_IP5 # Interrupt Controller 1, Request 1 |
| 60 | beq a0, zero, 5f |
| 61 | move a0, sp |
| 62 | jal intc1_req1_irqdispatch |
| 63 | j ret_from_irq |
| 64 | |
| 65 | 5: |
| 66 | move a0, sp |
| 67 | j spurious_interrupt |
| 68 | END(au1000_IRQ) |