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34 lines
650 B
34 lines
650 B
20 years ago
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#include <asm/asm.h>
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#include <asm/mipsregs.h>
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#include <asm/regdef.h>
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#include <asm/stackframe.h>
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.set noat
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.align 5
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NESTED(ev96100IRQ, PT_SIZE, sp)
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SAVE_ALL
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CLI # Important: mark KERNEL mode !
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mfc0 t0, CP0_CAUSE # get pending interrupts
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mfc0 t1, CP0_STATUS # get enabled interrupts
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and t0, t1 # isolate allowed ones
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# FIX ME add R7000 extensions
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andi t0,0xff00 # isolate pending bits
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andi a0, t0, CAUSEF_IP7
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beq a0, zero, 1f
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move a0, sp
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jal mips_timer_interrupt
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j ret_from_irq
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1: beqz t0, 3f # spurious interrupt
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move a0, t0
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move a1, sp
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jal ev96100_cpu_irq
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j ret_from_irq
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3: j spurious_interrupt
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END(ev96100IRQ)
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