| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2002 Momentum Computer Inc. |
| 3 | * Author: Matthew Dharm <mdharm@momenco.com> |
| 4 | * |
| 5 | * Copyright 2001 MontaVista Software Inc. |
| 6 | * Author: jsun@mvista.com or jsun@junsun.net |
| 7 | * |
| 8 | * First-level interrupt dispatcher for Ocelot-CS board. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify it |
| 11 | * under the terms of the GNU General Public License as published by the |
| 12 | * Free Software Foundation; either version 2 of the License, or (at your |
| 13 | * option) any later version. |
| 14 | */ |
| 15 | #include <asm/asm.h> |
| 16 | #include <asm/mipsregs.h> |
| 17 | #include <asm/addrspace.h> |
| 18 | #include <asm/regdef.h> |
| 19 | #include <asm/stackframe.h> |
| 20 | #include "ocelot_c_fpga.h" |
| 21 | |
| 22 | /* |
| 23 | * First level interrupt dispatcher for Ocelot-CS board |
| 24 | */ |
| 25 | .align 5 |
| 26 | NESTED(ocelot_handle_int, PT_SIZE, sp) |
| 27 | SAVE_ALL |
| 28 | CLI |
| 29 | .set at |
| Ralf Baechle | 42a3b4f | 2005-09-03 15:56:17 -0700 | [diff] [blame] | 30 | mfc0 t0, CP0_CAUSE |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | mfc0 t2, CP0_STATUS |
| 32 | |
| 33 | and t0, t2 |
| Ralf Baechle | 42a3b4f | 2005-09-03 15:56:17 -0700 | [diff] [blame] | 34 | |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | andi t1, t0, STATUSF_IP0 /* sw0 software interrupt */ |
| 36 | bnez t1, ll_sw0_irq |
| 37 | andi t1, t0, STATUSF_IP1 /* sw1 software interrupt */ |
| 38 | bnez t1, ll_sw1_irq |
| 39 | andi t1, t0, STATUSF_IP2 /* int0 hardware line */ |
| 40 | bnez t1, ll_scsi_irq |
| 41 | andi t1, t0, STATUSF_IP3 /* int1 hardware line */ |
| 42 | bnez t1, ll_uart_decode_irq |
| 43 | andi t1, t0, STATUSF_IP4 /* int2 hardware line */ |
| 44 | bnez t1, ll_pmc_irq |
| 45 | andi t1, t0, STATUSF_IP5 /* int3 hardware line */ |
| 46 | bnez t1, ll_cpci_decode_irq |
| 47 | andi t1, t0, STATUSF_IP6 /* int4 hardware line */ |
| 48 | bnez t1, ll_mv64340_decode_irq |
| 49 | andi t1, t0, STATUSF_IP7 /* cpu timer */ |
| 50 | bnez t1, ll_cputimer_irq |
| 51 | |
| 52 | .set reorder |
| 53 | |
| 54 | /* wrong alarm or masked ... */ |
| 55 | j spurious_interrupt |
| 56 | nop |
| 57 | END(ocelot_handle_int) |
| 58 | |
| 59 | .align 5 |
| 60 | ll_sw0_irq: |
| 61 | li a0, 0 |
| 62 | move a1, sp |
| 63 | jal do_IRQ |
| 64 | j ret_from_irq |
| 65 | ll_sw1_irq: |
| 66 | li a0, 1 |
| 67 | move a1, sp |
| 68 | jal do_IRQ |
| 69 | j ret_from_irq |
| 70 | ll_scsi_irq: |
| 71 | li a0, 2 |
| 72 | move a1, sp |
| 73 | jal do_IRQ |
| 74 | j ret_from_irq |
| 75 | |
| 76 | ll_uart_decode_irq: |
| 77 | move a0, sp |
| 78 | jal ll_uart_irq |
| 79 | j ret_from_irq |
| 80 | |
| 81 | ll_pmc_irq: |
| 82 | li a0, 4 |
| 83 | move a1, sp |
| 84 | jal do_IRQ |
| 85 | j ret_from_irq |
| Ralf Baechle | 42a3b4f | 2005-09-03 15:56:17 -0700 | [diff] [blame] | 86 | |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | ll_cpci_decode_irq: |
| 88 | move a0, sp |
| 89 | jal ll_cpci_irq |
| 90 | j ret_from_irq |
| 91 | |
| 92 | ll_mv64340_decode_irq: |
| 93 | move a0, sp |
| 94 | jal ll_mv64340_irq |
| 95 | j ret_from_irq |
| 96 | |
| 97 | ll_cputimer_irq: |
| 98 | li a0, 7 |
| 99 | move a1, sp |
| 100 | jal do_IRQ |
| 101 | j ret_from_irq |
| Ralf Baechle | 42a3b4f | 2005-09-03 15:56:17 -0700 | [diff] [blame] | 102 | |