diff options
Diffstat (limited to 'arch/mips/sgi-ip32/ip32-irq-glue.S')
| -rw-r--r-- | arch/mips/sgi-ip32/ip32-irq-glue.S | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/arch/mips/sgi-ip32/ip32-irq-glue.S b/arch/mips/sgi-ip32/ip32-irq-glue.S new file mode 100644 index 000000000000..200924e1c4f5 --- /dev/null +++ b/arch/mips/sgi-ip32/ip32-irq-glue.S @@ -0,0 +1,86 @@ +/* + * Low level interrupt handler for the SGI O2 aka IP32 aka Moosehead + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 2000 Harald Koerfgen + * Copyright (C) 2001 Keith M Wesolowski + */ +#include <asm/asm.h> +#include <asm/regdef.h> +#include <asm/mipsregs.h> +#include <asm/stackframe.h> +#include <asm/addrspace.h> + + .text + .set noreorder + .set noat + .align 5 + NESTED(ip32_handle_int, PT_SIZE, ra) + .set noat + SAVE_ALL + CLI # TEST: interrupts should be off + .set at + .set noreorder + + mfc0 s0,CP0_CAUSE + + andi t1, s0, IE_IRQ0 + bnez t1, handle_irq0 + andi t1, s0, IE_IRQ1 + bnez t1, handle_irq1 + andi t1, s0, IE_IRQ2 + bnez t1, handle_irq2 + andi t1, s0, IE_IRQ3 + bnez t1, handle_irq3 + andi t1, s0, IE_IRQ4 + bnez t1, handle_irq4 + andi t1, s0, IE_IRQ5 + bnez t1, handle_irq5 + nop + + /* Either someone has triggered the "software interrupts" + * or we lost an interrupt somehow. Ignore it. + */ + j ret_from_irq + nop + +handle_irq0: + jal ip32_irq0 + move a0, sp + j ret_from_irq + nop + +handle_irq1: + jal ip32_irq1 + move a0, sp + j ret_from_irq + nop + +handle_irq2: + jal ip32_irq2 + move a0, sp + j ret_from_irq + nop + +handle_irq3: + jal ip32_irq3 + move a0, sp + j ret_from_irq + nop + +handle_irq4: + jal ip32_irq4 + move a0, sp + j ret_from_irq + nop + +handle_irq5: + jal ip32_irq5 + move a0, sp + j ret_from_irq + nop + + END(ip32_handle_int) |
