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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/arm/mach-iop33x/include/mach/entry-macro.S
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/*

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 * arch/arm/mach-iop33x/include/mach/entry-macro.S

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 *

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 * Low-level IRQ helper macros for IOP33x-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/iop33x.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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	mrc	p15, 0, \tmp, c15, c1, 0

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	orr	\tmp, \tmp, #(1 << 6)

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	mcr	p15, 0, \tmp, c15, c1, 0	@ Enable cp6 access

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	mrc	p15, 0, \tmp, c15, c1, 0

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	mov	\tmp, \tmp

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	sub	pc, pc, #4			@ cp_wait

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	.endm

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	.macro  get_irqnr_and_base, irqnr, irqstat, base, tmp

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	mrc     p6, 0, \irqstat, c14, c0, 0     @ Read IINTVEC

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	cmp     \irqstat, #0

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	mrceq   p6, 0, \irqstat, c14, c0, 0     @ erratum 63 workaround

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	adds    \irqnr, \irqstat, #1

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	movne   \irqnr, \irqstat, lsr #2

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	.endm

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	.macro arch_ret_to_user, tmp1, tmp2

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	mrc	p15, 0, \tmp1, c15, c1, 0

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	ands	\tmp2, \tmp1, #(1 << 6)

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	bicne	\tmp1, \tmp1, #(1 << 6)

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	mcrne	p15, 0, \tmp1, c15, c1, 0	@ Disable cp6 access

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	.endm

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