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

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

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 *

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 * Low-level IRQ helper macros for Integrator 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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#include <mach/platform.h>

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#include <mach/irqs.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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/* FIXME: should not be using soo many LDRs here */

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		ldr	\base, =IO_ADDRESS(INTEGRATOR_IC_BASE)

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		mov	\irqnr, #IRQ_PIC_START

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		ldr	\irqstat, [\base, #IRQ_STATUS]		@ get masked status

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		ldr	\base, =IO_ADDRESS(INTEGRATOR_HDR_BASE)

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		teq	\irqstat, #0

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		ldreq	\irqstat, [\base, #(INTEGRATOR_HDR_IC_OFFSET+IRQ_STATUS)]

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		moveq	\irqnr, #IRQ_CIC_START

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1001:		tst	\irqstat, #15

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		bne	1002f

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		add	\irqnr, \irqnr, #4

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		movs	\irqstat, \irqstat, lsr #4

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		bne	1001b

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1002:		tst	\irqstat, #1

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		bne	1003f

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		add	\irqnr, \irqnr, #1

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		movs	\irqstat, \irqstat, lsr #1

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		bne	1002b

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1003:		/* EQ will be set if no irqs pending */

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		.endm

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