1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
|
/*
* arch/arm/mach-at91/include/mach/entry-macro.S
*
* Copyright (C) 2003-2005 SAN People
*
* Low-level IRQ helper macros for AT91RM9200 platforms
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <mach/hardware.h>
#include <mach/at91_aic.h>
.macro get_irqnr_preamble, base, tmp
ldr \base, =at91_aic_base @ base virtual address of AIC peripheral
ldr \base, [\base]
.endm
.macro get_irqnr_and_base, irqnr, irqstat, base, tmp
ldr \irqnr, [\base, #AT91_AIC_IVR] @ read IRQ vector register: de-asserts nIRQ to processor (and clears interrupt)
ldr \irqstat, [\base, #AT91_AIC_ISR] @ read interrupt source number
teq \irqstat, #0 @ ISR is 0 when no current interrupt, or spurious interrupt
streq \tmp, [\base, #AT91_AIC_EOICR] @ not going to be handled further, then ACK it now.
.endm
|
