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

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

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 *

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 * Low-level IRQ helper macros for PXA-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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#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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		mrc	p15, 0, \tmp, c0, c0, 0		@ CPUID

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		mov	\tmp, \tmp, lsr #13

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		and	\tmp, \tmp, #0x7		@ Core G

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		cmp	\tmp, #1

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		bhi	1002f

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		@ Core Generation 1 (PXA25x)

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		mov	\base, #io_p2v(0x40000000)	@ IIR Ctl = 0x40d00000

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		add	\base, \base, #0x00d00000

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		ldr	\irqstat, [\base, #0]		@ ICIP

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		ldr	\irqnr, [\base, #4]		@ ICMR

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		ands	\irqnr, \irqstat, \irqnr

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		beq	1001f

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		rsb	\irqstat, \irqnr, #0

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		and	\irqstat, \irqstat, \irqnr

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		clz	\irqnr, \irqstat

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		rsb	\irqnr, \irqnr, #(31 + PXA_IRQ(0))

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		b	1001f

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1002:

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		@ Core Generation 2 (PXA27x) or Core Generation 3 (PXA3xx)

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		mrc	p6, 0, \irqstat, c5, c0, 0	@ ICHP

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		tst	\irqstat, #0x80000000

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		beq	1001f

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		bic	\irqstat, \irqstat, #0x80000000

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		mov	\irqnr, \irqstat, lsr #16

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		add	\irqnr, \irqnr, #(PXA_IRQ(0))

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1001:

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		.endm

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