33 lines
1.0 KiB
ArmAsm
33 lines
1.0 KiB
ArmAsm
/*
|
|
* include/asm-arm/arch-at91/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 <asm/hardware.h>
|
|
#include <asm/arch/at91_aic.h>
|
|
|
|
.macro disable_fiq
|
|
.endm
|
|
|
|
.macro get_irqnr_preamble, base, tmp
|
|
ldr \base, =(AT91_VA_BASE_SYS + AT91_AIC) @ base virtual address of AIC peripheral
|
|
.endm
|
|
|
|
.macro arch_ret_to_user, tmp1, tmp2
|
|
.endm
|
|
|
|
.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.
|
|
.endm
|
|
|