1/* 2 * arch/arm/mach-at91/include/mach/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 <mach/hardware.h> 14#include <mach/at91_aic.h> 15 16 .macro get_irqnr_preamble, base, tmp 17 ldr \base, =at91_aic_base @ base virtual address of AIC peripheral 18 ldr \base, [\base] 19 .endm 20 21 .macro get_irqnr_and_base, irqnr, irqstat, base, tmp 22 ldr \irqnr, [\base, #AT91_AIC_IVR] @ read IRQ vector register: de-asserts nIRQ to processor (and clears interrupt) 23 ldr \irqstat, [\base, #AT91_AIC_ISR] @ read interrupt source number 24 teq \irqstat, #0 @ ISR is 0 when no current interrupt, or spurious interrupt 25 streq \tmp, [\base, #AT91_AIC_EOICR] @ not going to be handled further, then ACK it now. 26 .endm 27 28