| /* |
| * 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 |
| .endm |
| |
| .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 |
| .endm |
