| Ralf Baechle | 23fbee9 | 2005-07-25 22:45:45 +0000 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/mips/tx4938/common/handler.S |
| 3 | * |
| 4 | * Primary interrupt handler for tx4938 based systems |
| 5 | * Copyright (C) 2000-2001 Toshiba Corporation |
| 6 | * |
| 7 | * 2003-2005 (c) MontaVista Software, Inc. This file is licensed under the |
| 8 | * terms of the GNU General Public License version 2. This program is |
| 9 | * licensed "as is" without any warranty of any kind, whether express |
| 10 | * or implied. |
| 11 | * |
| 12 | * Support for TX4938 in 2.6 - Manish Lachwani (mlachwani@mvista.com) |
| 13 | */ |
| 14 | #include <asm/asm.h> |
| 15 | #include <asm/mipsregs.h> |
| 16 | #include <asm/addrspace.h> |
| 17 | #include <asm/regdef.h> |
| 18 | #include <asm/stackframe.h> |
| 19 | #include <asm/tx4938/rbtx4938.h> |
| 20 | |
| 21 | |
| 22 | .align 5 |
| 23 | NESTED(tx4938_irq_handler, PT_SIZE, sp) |
| 24 | SAVE_ALL |
| 25 | CLI |
| 26 | .set at |
| 27 | |
| 28 | mfc0 t0, CP0_CAUSE |
| 29 | mfc0 t1, CP0_STATUS |
| 30 | and t0, t1 |
| 31 | |
| 32 | andi t1, t0, STATUSF_IP7 /* cpu timer */ |
| 33 | bnez t1, ll_ip7 |
| 34 | |
| 35 | /* IP6..IP3 multiplexed -- do not use */ |
| 36 | |
| 37 | andi t1, t0, STATUSF_IP2 /* tx4938 pic */ |
| 38 | bnez t1, ll_ip2 |
| 39 | |
| 40 | andi t1, t0, STATUSF_IP1 /* user line 1 */ |
| 41 | bnez t1, ll_ip1 |
| 42 | |
| 43 | andi t1, t0, STATUSF_IP0 /* user line 0 */ |
| 44 | bnez t1, ll_ip0 |
| 45 | |
| 46 | .set reorder |
| 47 | |
| 48 | nop |
| 49 | END(tx4938_irq_handler) |
| 50 | |
| 51 | .align 5 |
| 52 | |
| 53 | |
| 54 | ll_ip7: |
| 55 | li a0, TX4938_IRQ_CPU_TIMER |
| 56 | move a1, sp |
| 57 | jal do_IRQ |
| 58 | j ret_from_irq |
| 59 | |
| 60 | |
| 61 | ll_ip2: |
| 62 | jal tx4938_irq_nested |
| 63 | nop |
| 64 | beqz v0, goto_spurious_interrupt |
| 65 | nop |
| 66 | move a0, v0 |
| 67 | move a1, sp |
| 68 | jal do_IRQ |
| 69 | j ret_from_irq |
| 70 | |
| 71 | goto_spurious_interrupt: |
| 72 | j ret_from_irq |
| 73 | |
| 74 | ll_ip1: |
| 75 | li a0, TX4938_IRQ_USER1 |
| 76 | move a1, sp |
| 77 | jal do_IRQ |
| 78 | j ret_from_irq |
| 79 | |
| 80 | ll_ip0: |
| 81 | li a0, TX4938_IRQ_USER0 |
| 82 | move a1, sp |
| 83 | jal do_IRQ |
| 84 | j ret_from_irq |