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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/arm/mach-ep93xx/include/mach/entry-macro.S
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/*

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 * arch/arm/mach-ep93xx/include/mach/entry-macro.S

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 * IRQ demultiplexing for EP93xx

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 *

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 * Copyright (C) 2006 Lennert Buytenhek <[email protected]>

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 *

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 * This program is free software; you can redistribute it and/or modify

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 * it under the terms of the GNU General Public License as published by

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 * the Free Software Foundation; either version 2 of the License, or (at

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 * your option) any later version.

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 */

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#include <mach/ep93xx-regs.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	\base, =(EP93XX_AHB_VIRT_BASE)

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		orr	\base, \base, #0x000b0000

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		mov	\irqnr, #0

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		ldr	\irqstat, [\base]		@ lower 32 interrupts

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		cmp	\irqstat, #0

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		bne	1001f

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		eor	\base, \base, #0x00070000

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		ldr	\irqstat, [\base]		@ upper 32 interrupts

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		cmp	\irqstat, #0

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		beq	1002f

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		mov	\irqnr, #0x20

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1001:

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		movs	\tmp, \irqstat, lsl #16

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		movne	\irqstat, \tmp

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		addeq	\irqnr, \irqnr, #16

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		movs	\tmp, \irqstat, lsl #8

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		movne	\irqstat, \tmp

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		addeq	\irqnr, \irqnr, #8

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		movs	\tmp, \irqstat, lsl #4

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		movne	\irqstat, \tmp

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		addeq	\irqnr, \irqnr, #4

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		movs	\tmp, \irqstat, lsl #2

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		movne	\irqstat, \tmp

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		addeq	\irqnr, \irqnr, #2

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		movs	\tmp, \irqstat, lsl #1

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		addeq	\irqnr, \irqnr, #1

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		orrs	\base, \base, #1

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1002:

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		.endm

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