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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/arm/mach-ixp4xx/include/mach/entry-macro.S
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/*

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 * arch/arm/mach-ixp4xx/include/mach/entry-macro.S

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 *

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 * Low-level IRQ helper macros for IXP4xx-based platforms

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 *

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 * This file is licensed under  the terms of the GNU General Public

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 * License version 2. This program is licensed "as is" without any

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 * warranty of any kind, whether express or implied.

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 */

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#include <mach/hardware.h>

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		.macro	disable_fiq

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		.endm

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		.macro  get_irqnr_preamble, base, tmp

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		.endm

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		.macro  arch_ret_to_user, tmp1, tmp2

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		.endm

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		.macro	get_irqnr_and_base, irqnr, irqstat, base, tmp

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		ldr	\irqstat, =(IXP4XX_INTC_BASE_VIRT+IXP4XX_ICIP_OFFSET)

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		ldr	\irqstat, [\irqstat]		@ get interrupts

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		cmp	\irqstat, #0

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		beq	1001f				@ upper IRQ?

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		clz     \irqnr, \irqstat

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		mov     \base, #31

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		sub     \irqnr, \base, \irqnr

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		b	1002f				@ lower IRQ being

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							@ handled

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1001:

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		/*

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		 * IXP465/IXP435 has an upper IRQ status register

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		 */

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#if defined(CONFIG_CPU_IXP46X) || defined(CONFIG_CPU_IXP43X)

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		ldr	\irqstat, =(IXP4XX_INTC_BASE_VIRT+IXP4XX_ICIP2_OFFSET)

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		ldr	\irqstat, [\irqstat]		@ get upper interrupts

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		mov	\irqnr, #63

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		clz	\irqstat, \irqstat

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 		cmp	\irqstat, #32

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		subne	\irqnr, \irqnr, \irqstat

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#endif

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1002:

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		.endm

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