| /* |
| * Copyright 2001 MontaVista Software Inc. |
| * Author: jsun@mvista.com or jsun@junsun.net |
| * |
| * First-level interrupt dispatcher for ddb5476 |
| * |
| * 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/ddb5476.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(ddb5476_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_cpu_ip7 |
| andi t1, t0, STATUSF_IP2 /* vrc5476 & i8259 */ |
| bnez t1, ll_cpu_ip2 |
| andi t1, t0, STATUSF_IP3 |
| bnez t1, ll_cpu_ip3 |
| andi t1, t0, STATUSF_IP4 |
| bnez t1, ll_cpu_ip4 |
| andi t1, t0, STATUSF_IP5 |
| bnez t1, ll_cpu_ip5 |
| andi t1, t0, STATUSF_IP6 |
| bnez t1, ll_cpu_ip6 |
| 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 |
| move a0, sp |
| jal vrc5476_irq_dispatch |
| j ret_from_irq |
| nop |
| |
| .align 5 |
| |
| 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 |
| |
| ll_cpu_ip2: /* jump to second-level dispatching */ |
| move a0, sp |
| jal vrc5476_irq_dispatch |
| j ret_from_irq |
| |
| ll_cpu_ip3: |
| li a0, CPU_IRQ_BASE + 3 |
| move a1, sp |
| jal do_IRQ |
| j ret_from_irq |
| |
| ll_cpu_ip4: |
| li a0, CPU_IRQ_BASE + 4 |
| move a1, sp |
| jal do_IRQ |
| j ret_from_irq |
| |
| ll_cpu_ip5: |
| li a0, CPU_IRQ_BASE + 5 |
| move a1, sp |
| jal do_IRQ |
| j ret_from_irq |
| |
| ll_cpu_ip6: |
| li a0, CPU_IRQ_BASE + 6 |
| move a1, sp |
| jal do_IRQ |
| j ret_from_irq |
| |
| ll_cpu_ip7: |
| li a0, CPU_IRQ_BASE + 7 |
| move a1, sp |
| jal do_IRQ |
| j ret_from_irq |
| |
| END(ddb5476_handle_int) |