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86 lines
1.5 KiB
86 lines
1.5 KiB
/*
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* Low level interrupt handler for the SGI O2 aka IP32 aka Moosehead
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2000 Harald Koerfgen
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* Copyright (C) 2001 Keith M Wesolowski
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*/
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#include <asm/asm.h>
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#include <asm/regdef.h>
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#include <asm/mipsregs.h>
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#include <asm/stackframe.h>
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#include <asm/addrspace.h>
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.text
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.set noreorder
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.set noat
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.align 5
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NESTED(ip32_handle_int, PT_SIZE, ra)
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.set noat
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SAVE_ALL
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CLI # TEST: interrupts should be off
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.set at
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.set noreorder
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mfc0 s0,CP0_CAUSE
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andi t1, s0, IE_IRQ0
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bnez t1, handle_irq0
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andi t1, s0, IE_IRQ1
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bnez t1, handle_irq1
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andi t1, s0, IE_IRQ2
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bnez t1, handle_irq2
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andi t1, s0, IE_IRQ3
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bnez t1, handle_irq3
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andi t1, s0, IE_IRQ4
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bnez t1, handle_irq4
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andi t1, s0, IE_IRQ5
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bnez t1, handle_irq5
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nop
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/* Either someone has triggered the "software interrupts"
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* or we lost an interrupt somehow. Ignore it.
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*/
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j ret_from_irq
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nop
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handle_irq0:
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jal ip32_irq0
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move a0, sp
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j ret_from_irq
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nop
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handle_irq1:
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jal ip32_irq1
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move a0, sp
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j ret_from_irq
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nop
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handle_irq2:
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jal ip32_irq2
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move a0, sp
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j ret_from_irq
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nop
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handle_irq3:
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jal ip32_irq3
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move a0, sp
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j ret_from_irq
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nop
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handle_irq4:
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jal ip32_irq4
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move a0, sp
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j ret_from_irq
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nop
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handle_irq5:
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jal ip32_irq5
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move a0, sp
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j ret_from_irq
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nop
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END(ip32_handle_int)
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