| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * int-handler.S |
| 3 | * |
| 4 | * Based on the cobalt handler. |
| 5 | */ |
| 6 | #include <asm/asm.h> |
| 7 | #include <asm/mipsregs.h> |
| 8 | #include <asm/addrspace.h> |
| 9 | #include <asm/regdef.h> |
| 10 | #include <asm/stackframe.h> |
| 11 | |
| 12 | /* |
| 13 | * galileo_handle_int - |
| 14 | * We check for the timer first, then check PCI ints A and D. |
| 15 | * Then check for serial IRQ and fall through. |
| 16 | */ |
| 17 | .align 5 |
| 18 | .set reorder |
| 19 | .set noat |
| 20 | NESTED(galileo_handle_int, PT_SIZE, sp) |
| 21 | SAVE_ALL |
| 22 | CLI |
| 23 | .set at |
| 24 | mfc0 t0,CP0_CAUSE |
| 25 | mfc0 t2,CP0_STATUS |
| 26 | |
| 27 | and t0,t2 |
| 28 | |
| 29 | andi t1,t0,STATUSF_IP4 /* int2 hardware line (timer) */ |
| 30 | bnez t1,ll_gt64120_irq |
| 31 | andi t1,t0,STATUSF_IP2 /* int0 hardware line */ |
| 32 | bnez t1,ll_pci_intA |
| 33 | andi t1,t0,STATUSF_IP5 /* int3 hardware line */ |
| 34 | bnez t1,ll_pci_intD |
| 35 | andi t1,t0,STATUSF_IP6 /* int4 hardware line */ |
| 36 | bnez t1,ll_serial_irq |
| 37 | andi t1,t0,STATUSF_IP7 /* compare int */ |
| 38 | bnez t1,ll_compare_irq |
| 39 | nop |
| 40 | |
| 41 | /* wrong alarm or masked ... */ |
| 42 | j spurious_interrupt |
| 43 | nop |
| 44 | END(galileo_handle_int) |
| 45 | |
| 46 | |
| 47 | .align 5 |
| 48 | .set reorder |
| 49 | ll_gt64120_irq: |
| 50 | li a0,4 |
| 51 | move a1,sp |
| 52 | jal do_IRQ |
| 53 | nop |
| 54 | j ret_from_irq |
| 55 | nop |
| 56 | |
| 57 | .align 5 |
| 58 | .set reorder |
| 59 | ll_compare_irq: |
| 60 | li a0,7 |
| 61 | move a1,sp |
| 62 | jal do_IRQ |
| 63 | nop |
| 64 | j ret_from_irq |
| 65 | nop |
| 66 | |
| 67 | .align 5 |
| 68 | .set reorder |
| 69 | ll_pci_intA: |
| 70 | move a0,sp |
| 71 | jal pci_intA |
| 72 | nop |
| 73 | j ret_from_irq |
| 74 | nop |
| 75 | |
| 76 | #if 0 |
| 77 | .align 5 |
| 78 | .set reorder |
| 79 | ll_pci_intB: |
| 80 | move a0,sp |
| 81 | jal pci_intB |
| 82 | nop |
| 83 | j ret_from_irq |
| 84 | nop |
| 85 | |
| 86 | .align 5 |
| 87 | .set reorder |
| 88 | ll_pci_intC: |
| 89 | move a0,sp |
| 90 | jal pci_intC |
| 91 | nop |
| 92 | j ret_from_irq |
| 93 | nop |
| 94 | #endif |
| 95 | |
| 96 | .align 5 |
| 97 | .set reorder |
| 98 | ll_pci_intD: |
| 99 | move a0,sp |
| 100 | jal pci_intD |
| 101 | nop |
| 102 | j ret_from_irq |
| 103 | nop |
| 104 | |
| 105 | .align 5 |
| 106 | .set reorder |
| 107 | ll_serial_irq: |
| 108 | li a0,6 |
| 109 | move a1,sp |
| 110 | jal do_IRQ |
| 111 | nop |
| 112 | j ret_from_irq |
| 113 | nop |