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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/sparc/lib/NG4copy_page.S
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/* SPDX-License-Identifier: GPL-2.0 */

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/* NG4copy_page.S: Niagara-4 optimized copy page.

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 *

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 * Copyright (C) 2012 ([email protected])

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 */

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#include <asm/asi.h>

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#include <asm/page.h>

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	.text

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	.align		32

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	.register	%g2, #scratch

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	.register	%g3, #scratch

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	.globl		NG4copy_user_page

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NG4copy_user_page:	/* %o0=dest, %o1=src, %o2=vaddr */

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	prefetch	[%o1 + 0x000], #n_reads_strong

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	prefetch	[%o1 + 0x040], #n_reads_strong

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	prefetch	[%o1 + 0x080], #n_reads_strong

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	prefetch	[%o1 + 0x0c0], #n_reads_strong

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	set		PAGE_SIZE, %g7

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	prefetch	[%o1 + 0x100], #n_reads_strong

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	prefetch	[%o1 + 0x140], #n_reads_strong

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	prefetch	[%o1 + 0x180], #n_reads_strong

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	prefetch	[%o1 + 0x1c0], #n_reads_strong

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1:

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	ldx		[%o1 + 0x00], %o2

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	subcc		%g7, 0x40, %g7

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	ldx		[%o1 + 0x08], %o3

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	ldx		[%o1 + 0x10], %o4

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	ldx		[%o1 + 0x18], %o5

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	ldx		[%o1 + 0x20], %g1

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	stxa		%o2, [%o0] ASI_ST_BLKINIT_MRU_P

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	add		%o0, 0x08, %o0

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	ldx		[%o1 + 0x28], %g2

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	stxa		%o3, [%o0] ASI_ST_BLKINIT_MRU_P

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	add		%o0, 0x08, %o0

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	ldx		[%o1 + 0x30], %g3

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	stxa		%o4, [%o0] ASI_ST_BLKINIT_MRU_P

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	add		%o0, 0x08, %o0

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	ldx		[%o1 + 0x38], %o2

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	add		%o1, 0x40, %o1

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	stxa		%o5, [%o0] ASI_ST_BLKINIT_MRU_P

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	add		%o0, 0x08, %o0

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	stxa		%g1, [%o0] ASI_ST_BLKINIT_MRU_P

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	add		%o0, 0x08, %o0

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	stxa		%g2, [%o0] ASI_ST_BLKINIT_MRU_P

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	add		%o0, 0x08, %o0

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	stxa		%g3, [%o0] ASI_ST_BLKINIT_MRU_P

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	add		%o0, 0x08, %o0

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	stxa		%o2, [%o0] ASI_ST_BLKINIT_MRU_P

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	add		%o0, 0x08, %o0

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	bne,pt		%icc, 1b

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	 prefetch	[%o1 + 0x200], #n_reads_strong

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	retl

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	 membar		#StoreLoad | #StoreStore

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	.size		NG4copy_user_page,.-NG4copy_user_page

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