| /* |
| * Copyright 2001 MontaVista Software Inc. |
| * Author: jsun@mvista.com or jsun@junsun.net |
| * |
| * First-level interrupt dispatcher for ddb5477 |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License as published by the |
| * Free Software Foundation; either version 2 of the License, or (at your |
| * option) any later version. |
| */ |
| #include <asm/asm.h> |
| #include <asm/mipsregs.h> |
| #include <asm/addrspace.h> |
| #include <asm/regdef.h> |
| #include <asm/stackframe.h> |
| #include <asm/ddb5xxx/ddb5477.h> |
| |
| /* |
| * first level interrupt dispatcher for ocelot board - |
| * We check for the timer first, then check PCI ints A and D. |
| * Then check for serial IRQ and fall through. |
| */ |
| .align 5 |
| NESTED(ddb5477_handle_int, PT_SIZE, sp) |
| SAVE_ALL |
| CLI |
| .set at |
| .set noreorder |
| mfc0 t0, CP0_CAUSE |
| mfc0 t2, CP0_STATUS |
| |
| and t0, t2 |
| |
| andi t1, t0, STATUSF_IP7 /* cpu timer */ |
| bnez t1, ll_cputimer_irq |
| andi t1, t0, (STATUSF_IP2 | STATUSF_IP3 | STATUSF_IP4 | STATUSF_IP5 | STATUSF_IP6 ) |
| bnez t1, ll_vrc5477_irq |
| andi t1, t0, STATUSF_IP0 /* software int 0 */ |
| bnez t1, ll_cpu_ip0 |
| andi t1, t0, STATUSF_IP1 /* software int 1 */ |
| bnez t1, ll_cpu_ip1 |
| nop |
| .set reorder |
| |
| /* wrong alarm or masked ... */ |
| j spurious_interrupt |
| nop |
| END(ddb5477_handle_int) |
| |
| .align 5 |
| |
| ll_vrc5477_irq: |
| move a0, sp |
| jal vrc5477_irq_dispatch |
| j ret_from_irq |
| |
| ll_cputimer_irq: |
| li a0, CPU_IRQ_BASE + 7 |
| move a1, sp |
| jal do_IRQ |
| j ret_from_irq |
| |
| |
| ll_cpu_ip0: |
| li a0, CPU_IRQ_BASE + 0 |
| move a1, sp |
| jal do_IRQ |
| j ret_from_irq |
| |
| ll_cpu_ip1: |
| li a0, CPU_IRQ_BASE + 1 |
| move a1, sp |
| jal do_IRQ |
| j ret_from_irq |