[ARM] 3587/1: AT91RM9200 hardware headers
[linux-2.6] / include / asm-arm / arch-at91rm9200 / entry-macro.S
1 /*
2  * include/asm-arm/arch-at91rm9200/entry-macro.S
3  *
4  *  Copyright (C) 2003-2005 SAN People
5  *
6  * Low-level IRQ helper macros for AT91RM9200 platforms
7  *
8  * This file is licensed under the terms of the GNU General Public
9  * License version 2. This program is licensed "as is" without any
10  * warranty of any kind, whether express or implied.
11  */
12
13 #include <asm/hardware.h>
14
15         .macro  disable_fiq
16         .endm
17
18         .macro  get_irqnr_and_base, irqnr, irqstat, base, tmp
19         ldr     \base, =(AT91_VA_BASE_SYS)              @ base virtual address of SYS peripherals
20         ldr     \irqnr, [\base, #AT91_AIC_IVR]          @ read IRQ vector register: de-asserts nIRQ to processor (and clears interrupt)
21         ldr     \irqstat, [\base, #AT91_AIC_ISR]        @ read interrupt source number
22         teq     \irqstat, #0                            @ ISR is 0 when no current interrupt, or spurious interrupt
23         streq   \tmp, [\base, #AT91_AIC_EOICR]          @ not going to be handled further, then ACK it now.
24         .endm
25