entry-macro.s

此工具是arm-linux-GCC交叉编译工具（cross-3.4.4）

/*
 * include/asm-arm/arch-l7200/entry-macro.S
 *
 * Low-level IRQ helper macros for L7200-based 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>

		.equ	irq_base_addr,	IO_BASE_2

		.macro  disable_fiq
		.endm

		.macro  get_irqnr_and_base, irqnr, irqstat, base, tmp
		mov     \irqstat, #irq_base_addr		@ Virt addr IRQ regs
		add	\irqstat, \irqstat, #0x00001000		@ Status reg
		ldr     \irqstat, [\irqstat, #0]		@ get interrupts
		mov     \irqnr, #0
1001:		tst     \irqstat, #1
		addeq   \irqnr, \irqnr, #1
		moveq   \irqstat, \irqstat, lsr #1
		tsteq   \irqnr, #32
		beq     1001b
		teq     \irqnr, #32
		.endm