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/*
* 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) 1995, 1996, 1997, 2003 by Ralf Baechle
* Copyright (C) Wind River System Inc. Rongkai.Zhan <rongkai.zhan@windriver.com>
*/
#include <asm/asm.h>
#include <asm/mipsregs.h>
#include <asm/addrspace.h>
#include <asm/regdef.h>
#include <asm/stackframe.h>
#include <asm/mach-wrppmc/mach-gt64120.h>
.align 5
.set noat
NESTED(handle_IRQ, PT_SIZE, sp)
SAVE_ALL
CLI # Important: mark KERNEL mode !
.set at
mfc0 t0, CP0_CAUSE # get pending interrupts
mfc0 t1, CP0_STATUS # get enabled interrupts
and t0, t0, t1 # get allowed interrupts
andi t0, t0, 0xFF00
beqz t0, 1f
move a1, sp # Prepare 'struct pt_regs *regs' pointer
andi t1, t0, CAUSEF_IP7 # CPU Compare/Count internal timer
bnez t1, handle_cputimer_irq
andi t1, t0, CAUSEF_IP6 # UART 16550 port
bnez t1, handle_uart_irq
andi t1, t0, CAUSEF_IP3 # PCI INT_A
bnez t1, handle_pci_intA_irq
/* wrong alarm or masked ... */
1: j spurious_interrupt
nop
END(handle_IRQ)
.align 5
handle_cputimer_irq:
li a0, WRPPMC_MIPS_TIMER_IRQ
jal do_IRQ
j ret_from_irq
.align 5
handle_uart_irq:
li a0, WRPPMC_UART16550_IRQ
jal do_IRQ
j ret_from_irq
.align 5
handle_pci_intA_irq:
li a0, WRPPMC_PCI_INTA_IRQ
jal do_IRQ
j ret_from_irq
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