[deliverable/linux.git] / arch / arm / mach-orion5x / include / mach / entry-macro.S

/*
 * 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
Commit	Line	Data
585cf175	1	/*
a09e64fb	2	* arch/arm/mach-orion5x/include/mach/entry-macro.S
585cf175 TP	3	*
	4	* Low-level IRQ helper macros for Orion platforms
	5	*
7f74c2c7 LB	6	* This file is licensed under the terms of the GNU General Public
7f74c2c7 LB	7	* License version 2. This program is licensed "as is" without any
585cf175 TP	8	* warranty of any kind, whether express or implied.
	9	*/
	10
fdd8b079	11	#include <mach/bridge-regs.h>
585cf175	12
585cf175 TP	13	.macro get_irqnr_preamble, base, tmp
	14	ldr \base, =MAIN_IRQ_CAUSE
	15	.endm
	16
	17	.macro get_irqnr_and_base, irqnr, irqstat, base, tmp
	18	ldr \irqstat, [\base, #0] @ main cause
	19	ldr \tmp, [\base, #(MAIN_IRQ_MASK - MAIN_IRQ_CAUSE)] @ main mask
	20	mov \irqnr, #0 @ default irqnr
	21	@ find cause bits that are unmasked
	22	ands \irqstat, \irqstat, \tmp @ clear Z flag if any
	23	clzne \irqnr, \irqstat @ calc irqnr
	24	rsbne \irqnr, \irqnr, #31
	25	.endm