| SAN People | 73a59c1 | 2006-01-09 17:05:41 +0000 | [diff] [blame^] | 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 | |