entry-macro.s

linux 内核源代码

/*
 * include/asm-arm/arch-ks8695/entry-macro.S
 *
 * Copyright (C) 2006 Ben Dooks <[e-mail]>
 * Copyright (C) 2006 Simtec Electronics
 *
 * Low-level IRQ helper macros for KS8695
 *
 * 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/regs-irq.h>

	.macro	disable_fiq
	.endm

	.macro  get_irqnr_preamble, base, tmp
		ldr	\base, =KS8695_IRQ_VA			@ Base address of interrupt controller
	.endm

	.macro  arch_ret_to_user, tmp1, tmp2
	.endm

	.macro	get_irqnr_and_base, irqnr, irqstat, base, tmp
		ldr	\irqstat, [\base, #KS8695_INTMS]	@ Mask Status register

		teq	\irqstat, #0
		beq	1001f

		mov	\irqnr, #0

		tst	\irqstat, #0xff
		moveq	\irqstat, \irqstat, lsr #8
		addeq	\irqnr, \irqnr, #8
		tsteq	\irqstat, #0xff
		moveq	\irqstat, \irqstat, lsr #8
		addeq	\irqnr, \irqnr, #8
		tsteq	\irqstat, #0xff
		moveq	\irqstat, \irqstat, lsr #8
		addeq	\irqnr, \irqnr, #8
		tst	\irqstat, #0x0f
		moveq	\irqstat, \irqstat, lsr #4
		addeq	\irqnr, \irqnr, #4
		tst	\irqstat, #0x03
		moveq	\irqstat, \irqstat, lsr #2
		addeq	\irqnr, \irqnr, #2
		tst	\irqstat, #0x01
		addeqs	\irqnr, \irqnr, #1
1001:
	.endm