jens
ab41a4f80f
Committed on the Free edition of March Hare Software CVSNT Server. Upgrade to CVS Suite for more features and support: http://march-hare.com/cvsnt/ git-svn-id: http://moon:8086/svn/vhdl/trunk@789 cc03376c-175c-47c8-b038-4cd826a8556b
47 lines
602 B
ArmAsm
47 lines
602 B
ArmAsm
.file "kernel.S"
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.section .ktext,"ax"
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.align 2
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.macro kpush reg
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addiu $sp, 4
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sw \reg, 0($sp)
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.endm
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.macro kpop reg
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lw \reg, 0($sp)
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addiu $sp, -4
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.endm
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_exc_handler:
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.set noreorder
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# Set Error LED and ExcCode LEDs
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# Get Cause
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mfc0 $26, $13
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li $27, 0xC0000000
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srl $26, 2
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andi $26, 0x000F
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or $26, $27
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la $27, sys_led_port
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sw $26, 0($27)
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# wait for all interrupts = 0
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$w4x: mfc0 $26, $13
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nop
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srl $26, 8
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andi $26, 0xFF
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bnez $26, $w4x
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nop
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# Get return address
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mfc0 $26, $14
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# Return
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nop
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jr $26
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rfe
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.set reorder
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