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/*
* Copyright 2001 MontaVista Software Inc.
* Author: jsun@mvista.com or jsun@junsun.net
*
* First-level interrupt dispatcher for ddb5477
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/config.h>
#include <asm/asm.h>
#include <asm/mipsregs.h>
#include <asm/addrspace.h>
#include <asm/regdef.h>
#include <asm/stackframe.h>
/* this value should be the same to the one in include/asm/ddb5xxx/ddb5477.h */
#define DDB_LED 0xbd010000
/*
* first level interrupt dispatcher for ocelot board -
* We check for the timer first, then check PCI ints A and D.
* Then check for serial IRQ and fall through.
*/
.align 5
NESTED(ddb5477_handle_int, PT_SIZE, sp)
SAVE_ALL
CLI
.set at
.set noreorder
mfc0 t0, CP0_CAUSE
mfc0 t2, CP0_STATUS
and t0, t2
andi t1, t0, STATUSF_IP7 /* cpu timer */
bnez t1, ll_cputimer_irq
andi t1, t0, (STATUSF_IP2 | STATUSF_IP3 | STATUSF_IP4 | STATUSF_IP5 | STATUSF_IP6 )
bnez t1, ll_vrc5477_irq
andi t1, t0, STATUSF_IP0 /* software int 0 */
bnez t1, ll_cpu_ip0
andi t1, t0, STATUSF_IP1 /* software int 1 */
bnez t1, ll_cpu_ip1
nop
.set reorder
/* wrong alarm or masked ... */
j spurious_interrupt
nop
END(ddb5477_handle_int)
.align 5
ll_vrc5477_irq:
move a0, sp
jal vrc5477_irq_dispatch
j ret_from_irq
ll_cputimer_irq:
#if defined(CONFIG_LL_DEBUG)
/* we trigger software interrupt 0 */
mfc0 t0, CP0_CAUSE
ori t0, t0, C_SW0
mtc0 t0, CP0_CAUSE
nop
/* we also set the LED here so when heartbeat stops we know
* intr still happens. */
la t0, jiffies
lw t1, 0(t0)
srl t1, t1, 4
andi t1, t1, 0xf
sb t1, DDB_LED
#endif
li a0, 7
move a1, sp
jal do_IRQ
j ret_from_irq
ll_cpu_ip0:
li a0, 0
move a1, sp
jal do_IRQ
j ret_from_irq
ll_cpu_ip1:
li a0, 1
move a1, sp
jal do_IRQ
j ret_from_irq
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