| Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 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 disable_fiq |
| 17 | .endm |
| 18 | |
| 19 | .macro get_irqnr_preamble, base, tmp |
| 20 | ldr \base, =(AT91_VA_BASE_SYS + AT91_AIC) @ base virtual address of AIC peripheral |
| 21 | .endm |
| 22 | |
| 23 | .macro arch_ret_to_user, tmp1, tmp2 |
| 24 | .endm |
| 25 | |
| 26 | .macro get_irqnr_and_base, irqnr, irqstat, base, tmp |
| 27 | ldr \irqnr, [\base, #(AT91_AIC_IVR - AT91_AIC)] @ read IRQ vector register: de-asserts nIRQ to processor (and clears interrupt) |
| 28 | ldr \irqstat, [\base, #(AT91_AIC_ISR - AT91_AIC)] @ read interrupt source number |
| 29 | teq \irqstat, #0 @ ISR is 0 when no current interrupt, or spurious interrupt |
| 30 | streq \tmp, [\base, #(AT91_AIC_EOICR - AT91_AIC)] @ not going to be handled further, then ACK it now. |
| 31 | .endm |
| 32 | |