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* 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 disable_fiq
.macro get_irqnr_preamble, base, tmp
ldr \base, =(AT91_VA_BASE_SYS + AT91_AIC) @ base virtual address of AIC peripheral
.macro arch_ret_to_user, tmp1, tmp2
.macro get_irqnr_and_base, irqnr, irqstat, base, tmp
ldr \irqnr, [\base, #(AT91_AIC_IVR - AT91_AIC)] @ read IRQ vector register: de-asserts nIRQ to processor (and clears interrupt)
ldr \irqstat, [\base, #(AT91_AIC_ISR - AT91_AIC)] @ read interrupt source number
teq \irqstat, #0 @ ISR is 0 when no current interrupt, or spurious interrupt
streq \tmp, [\base, #(AT91_AIC_EOICR - AT91_AIC)] @ not going to be handled further, then ACK it now.