URL
https://opencores.org/ocsvn/or1k/or1k/trunk
Subversion Repositories or1k
[/] [or1k/] [trunk/] [rc203soc/] [sw/] [uClinux/] [arch/] [armnommu/] [lib/] [irqs-ebsa.S] - Rev 1765
Compare with Previous | Blame | View Log
/*
* linux/arch/arm/lib/irqs.S
*
* Copyright (C) 1995, 1996 Russell King. (rmk@ecs.soton.ac.uk)
*
* Interrupt wrappers - handles disabling & re-enabling interrupts
*/
#include <asm/assembler.h>
@ IRQ stubs
@ IRQ stubs entered with:
@ r0 = IRQ number
@ r1 = regs
@ r4 = IRQ_MSKD (only for CTB_OS)
@ return 0 for normal irq
.text
/*
* Disable interrupt & print a message
*/
LC0: .long _intr_count
.globl _bad_IRQ_interrupt
_bad_IRQ_interrupt:
mov r9, lr
mov r5, #1
mov r5, r5, lsl r0
strb r5, [r4]
bl _bad_IRQ
mov r0, #0
mov pc, r9
.globl _fast_IRQ_interrupt
_fast_IRQ_interrupt:
mov r9, lr
mov r5, #1
mov r5, r5, lsl r0
strb r5, [r4]
ldr r6, LC0
ldr r7, [r6]
add r2, r7, #1
str r2, [r6]
bl _do_IRQ
mrs r2, cpsr
orr r2, r2, #I_BIT
msr cpsr, r2
str r7, [r6]
sub r4, r4, #0x400000
strb r5, [r4]
mov r0, #1
mov pc, r9
.globl _IRQ_interrupt
_IRQ_interrupt:
mov r9, lr
mov r5, #1
mov r5, r5, lsl r0
strb r5, [r4] @ Disable interrupt source
ldr r6, LC0
ldr r7, [r6]
add r2, r7, #1
str r2, [r6]
mrs r8, cpsr @ Enable interrupts
bic r2, r8, #I_BIT
msr cpsr, r2
bl _do_IRQ
msr cpsr, r8 @ Restore interrupts
str r7, [r6]
sub r4, r4, #0x400000
strb r5, [r4] @ Re-enable interrupt source
mov r0, #0
mov pc, r9
.globl _timer_IRQ_interrupt
_timer_IRQ_interrupt:
mov r9, lr
mov r5, #1
mov r5, r5, lsl r0
strb r5, [r4] @ Disable interrupt source
ldr r6, LC0
ldr r7, [r6]
add r2, r7, #1
str r2, [r6]
mrs r8, cpsr
bl _do_IRQ
msr cpsr, r8 @ Restore interrupts
str r7, [r6]
sub r4, r4, #0x400000
strb r5, [r4] @ Re-enable interrupt source
mov r0, #0
mov pc, r9
.globl _probe_IRQ_interrupt
_probe_IRQ_interrupt:
mov r9, lr
mov r5, #1
mov r5, r5, lsl r0
add r6, r4, #0x400000
strb r5, [r6]
ldr r6, LC0+4
ldrb r4, [r6]
bic r4, r4, r5
strb r4, [r6]
mov pc, r9
.global _bad_IRQ
_bad_IRQ: mov r1, r0
adr r0, Lmsg
b _printk
Lmsg: .ascii "Bad interrupt %d received!\n\0"
.align