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/*
 * 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 
 
@ 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

Line No.	Rev	Author	Line
1	199	simons	`/*`
2			`* linux/arch/arm/lib/irqs.S`
3			`*`
4			`* Copyright (C) 1995, 1996 Russell King. (rmk@ecs.soton.ac.uk)`
5			`*`
6			`* Interrupt wrappers - handles disabling & re-enabling interrupts`
7			`*/`
8
9			`#include`
10
11			`@ IRQ stubs`
12
13			`@ IRQ stubs entered with:`
14			`@ r0 = IRQ number`
15			`@ r1 = regs`
16			`@ r4 = IRQ_MSKD (only for CTB_OS)`
17			`@ return 0 for normal irq`
18
19			`.text`
20			`/*`
21			`* Disable interrupt & print a message`
22			`*/`
23			`LC0: .long _intr_count`
24
25			`.globl _bad_IRQ_interrupt`
26			`_bad_IRQ_interrupt:`
27			`mov r9, lr`
28			`mov r5, #1`
29			`mov r5, r5, lsl r0`
30			`strb r5, [r4]`
31			`bl _bad_IRQ`
32			`mov r0, #0`
33			`mov pc, r9`
34
35			`.globl _fast_IRQ_interrupt`
36			`_fast_IRQ_interrupt:`
37			`mov r9, lr`
38			`mov r5, #1`
39			`mov r5, r5, lsl r0`
40			`strb r5, [r4]`
41			`ldr r6, LC0`
42			`ldr r7, [r6]`
43			`add r2, r7, #1`
44			`str r2, [r6]`
45			`bl _do_IRQ`
46			`mrs r2, cpsr`
47			`orr r2, r2, #I_BIT`
48			`msr cpsr, r2`
49			`str r7, [r6]`
50			`sub r4, r4, #0x400000`
51			`strb r5, [r4]`
52			`mov r0, #1`
53			`mov pc, r9`
54
55			`.globl _IRQ_interrupt`
56			`_IRQ_interrupt:`
57			`mov r9, lr`
58			`mov r5, #1`
59			`mov r5, r5, lsl r0`
60			`strb r5, [r4] @ Disable interrupt source`
61			`ldr r6, LC0`
62			`ldr r7, [r6]`
63			`add r2, r7, #1`
64			`str r2, [r6]`
65			`mrs r8, cpsr @ Enable interrupts`
66			`bic r2, r8, #I_BIT`
67			`msr cpsr, r2`
68			`bl _do_IRQ`
69			`msr cpsr, r8 @ Restore interrupts`
70			`str r7, [r6]`
71			`sub r4, r4, #0x400000`
72			`strb r5, [r4] @ Re-enable interrupt source`
73			`mov r0, #0`
74			`mov pc, r9`
75
76			`.globl _timer_IRQ_interrupt`
77			`_timer_IRQ_interrupt:`
78			`mov r9, lr`
79			`mov r5, #1`
80			`mov r5, r5, lsl r0`
81			`strb r5, [r4] @ Disable interrupt source`
82			`ldr r6, LC0`
83			`ldr r7, [r6]`
84			`add r2, r7, #1`
85			`str r2, [r6]`
86			`mrs r8, cpsr`
87			`bl _do_IRQ`
88			`msr cpsr, r8 @ Restore interrupts`
89			`str r7, [r6]`
90			`sub r4, r4, #0x400000`
91			`strb r5, [r4] @ Re-enable interrupt source`
92			`mov r0, #0`
93			`mov pc, r9`
94
95			`.globl _probe_IRQ_interrupt`
96			`_probe_IRQ_interrupt:`
97			`mov r9, lr`
98			`mov r5, #1`
99			`mov r5, r5, lsl r0`
100			`add r6, r4, #0x400000`
101			`strb r5, [r6]`
102			`ldr r6, LC0+4`
103			`ldrb r4, [r6]`
104			`bic r4, r4, r5`
105			`strb r4, [r6]`
106			`mov pc, r9`
107
108			`.global _bad_IRQ`
109			`_bad_IRQ: mov r1, r0`
110			`adr r0, Lmsg`
111			`b _printk`
112
113			`Lmsg: .ascii "Bad interrupt %d received!\n\0"`
114			`.align`

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[/] [or1k/] [trunk/] [uclinux/] [uClinux-2.0.x/] [arch/] [armnommu/] [lib/] [irqs-ebsa.S] - Blame information for rev 1765