| 1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586 |
- /*
- * 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)
|
