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