30 lines
681 B
ArmAsm
30 lines
681 B
ArmAsm
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/* SPDX-License-Identifier: GPL-2.0 */
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/* NG4copy_page.S: Niagara-4 optimized clear page.
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*
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* Copyright (C) 2012 (davem@davemloft.net)
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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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.register %g3, #scratch
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.align 32
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.globl NG4clear_page
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.globl NG4clear_user_page
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NG4clear_page: /* %o0=dest */
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NG4clear_user_page: /* %o0=dest, %o1=vaddr */
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set PAGE_SIZE, %g7
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mov 0x20, %g3
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1: stxa %g0, [%o0 + %g0] ASI_ST_BLKINIT_MRU_P
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subcc %g7, 0x40, %g7
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stxa %g0, [%o0 + %g3] ASI_ST_BLKINIT_MRU_P
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bne,pt %xcc, 1b
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add %o0, 0x40, %o0
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membar #StoreLoad|#StoreStore
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retl
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nop
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.size NG4clear_page,.-NG4clear_page
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.size NG4clear_user_page,.-NG4clear_user_page
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