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

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 * Low-level IRQ helper macros for TI DaVinci-based platforms

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 *

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 * Author: Kevin Hilman, MontaVista Software, Inc. <[email protected]>

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 *

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 * 2007 (c) MontaVista Software, Inc. This file is licensed under

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 * the terms of the GNU General Public License version 2. This program

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 * is licensed "as is" without any warranty of any kind, whether express

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 * or implied.

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 */

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#include <mach/io.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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		ldr \base, =davinci_intc_base

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		ldr \base, [\base]

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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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#if defined(CONFIG_AINTC) && defined(CONFIG_CP_INTC)

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		ldr \tmp, =davinci_intc_type

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		ldr \tmp, [\tmp]

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		cmp \tmp, #DAVINCI_INTC_TYPE_CP_INTC

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		beq 1001f

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#endif

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#if defined(CONFIG_AINTC)

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		ldr \tmp, [\base, #0x14]

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		movs \tmp, \tmp, lsr #2

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		sub \irqnr, \tmp, #1

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		b 1002f

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#endif

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#if defined(CONFIG_CP_INTC)

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1001:		ldr \irqnr, [\base, #0x80] /* get irq number */

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		and \irqnr, \irqnr, #0xff  /* irq is in bits 0-9 */

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		mov \tmp, \irqnr, lsr #3

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		and \tmp, \tmp, #0xfc

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		add \tmp, \tmp, #0x280 /* get the register offset */

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		ldr \irqstat, [\base, \tmp] /* get the intc status */

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		cmp \irqstat, #0x0

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#endif

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1002:

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		.endm

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		.macro	irq_prio_table

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		.endm

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