diff options
Diffstat (limited to 'arch/mips/au1000/common/int-handler.S')
| -rw-r--r-- | arch/mips/au1000/common/int-handler.S | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/arch/mips/au1000/common/int-handler.S b/arch/mips/au1000/common/int-handler.S new file mode 100644 index 00000000000..1c4ca883321 --- /dev/null +++ b/arch/mips/au1000/common/int-handler.S @@ -0,0 +1,68 @@ +/* + * Copyright 2001 MontaVista Software Inc. + * Author: ppopov@mvista.com + * + * Interrupt dispatcher for Au1000 boards. + * + * 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> + + .text + .set macro + .set noat + .align 5 + +NESTED(au1000_IRQ, PT_SIZE, sp) + SAVE_ALL + CLI # Important: mark KERNEL mode ! + + mfc0 t0,CP0_CAUSE # get pending interrupts + mfc0 t1,CP0_STATUS # get enabled interrupts + and t0,t1 # isolate allowed ones + + andi t0,0xff00 # isolate pending bits + beqz t0, 3f # spurious interrupt + + andi a0, t0, CAUSEF_IP7 + beq a0, zero, 1f + move a0, sp + jal mips_timer_interrupt + j ret_from_irq + +1: + andi a0, t0, CAUSEF_IP2 # Interrupt Controller 0, Request 0 + beq a0, zero, 2f + move a0,sp + jal intc0_req0_irqdispatch + j ret_from_irq +2: + andi a0, t0, CAUSEF_IP3 # Interrupt Controller 0, Request 1 + beq a0, zero, 3f + move a0,sp + jal intc0_req1_irqdispatch + j ret_from_irq +3: + andi a0, t0, CAUSEF_IP4 # Interrupt Controller 1, Request 0 + beq a0, zero, 4f + move a0,sp + jal intc1_req0_irqdispatch + j ret_from_irq +4: + andi a0, t0, CAUSEF_IP5 # Interrupt Controller 1, Request 1 + beq a0, zero, 5f + move a0, sp + jal intc1_req1_irqdispatch + j ret_from_irq + +5: + move a0, sp + j spurious_interrupt +END(au1000_IRQ) |