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* arch/arm/mach-orion5x/include/mach/entry-macro.S
* Low-level IRQ helper macros for Orion 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/bridge-regs.h>
.macro get_irqnr_preamble, base, tmp
ldr \base, =MAIN_IRQ_CAUSE
.macro get_irqnr_and_base, irqnr, irqstat, base, tmp
ldr \irqstat, [\base, #0] @ main cause
ldr \tmp, [\base, #(MAIN_IRQ_MASK - MAIN_IRQ_CAUSE)] @ main mask
mov \irqnr, #0 @ default irqnr
@ find cause bits that are unmasked
ands \irqstat, \irqstat, \tmp @ clear Z flag if any
clzne \irqnr, \irqstat @ calc irqnr
rsbne \irqnr, \irqnr, #31