1/* 2 * include/asm-arm/arch-at91/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#include <asm/arch/at91_aic.h> 15 16 .macro disable_fiq 17 .endm 18 19 .macro get_irqnr_preamble, base, tmp 20 .endm 21 22 .macro arch_ret_to_user, tmp1, tmp2 23 .endm 24 25 .macro get_irqnr_and_base, irqnr, irqstat, base, tmp 26 ldr \base, =(AT91_VA_BASE_SYS + AT91_AIC) @ base virtual address of AIC peripheral 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