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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 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
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