169 строки
3.4 KiB
ArmAsm
169 строки
3.4 KiB
ArmAsm
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* Copyright (C) IBM Corporation, 2012
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*
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* Author: Anton Blanchard <anton@au.ibm.com>
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*/
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#include <asm/page.h>
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#include <asm/ppc_asm.h>
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_GLOBAL(copypage_power7)
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/*
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* We prefetch both the source and destination using enhanced touch
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* instructions. We use a stream ID of 0 for the load side and
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* 1 for the store side. Since source and destination are page
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* aligned we don't need to clear the bottom 7 bits of either
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* address.
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*/
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ori r9,r3,1 /* stream=1 => to */
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#ifdef CONFIG_PPC_64K_PAGES
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lis r7,0x0E01 /* depth=7
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* units/cachelines=512 */
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#else
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lis r7,0x0E00 /* depth=7 */
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ori r7,r7,0x1000 /* units/cachelines=32 */
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#endif
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ori r10,r7,1 /* stream=1 */
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lis r8,0x8000 /* GO=1 */
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clrldi r8,r8,32
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.machine push
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.machine "power4"
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/* setup read stream 0 */
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dcbt r0,r4,0b01000 /* addr from */
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dcbt r0,r7,0b01010 /* length and depth from */
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/* setup write stream 1 */
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dcbtst r0,r9,0b01000 /* addr to */
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dcbtst r0,r10,0b01010 /* length and depth to */
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eieio
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dcbt r0,r8,0b01010 /* all streams GO */
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.machine pop
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#ifdef CONFIG_ALTIVEC
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mflr r0
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std r3,48(r1)
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std r4,56(r1)
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std r0,16(r1)
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stdu r1,-STACKFRAMESIZE(r1)
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bl .enter_vmx_copy
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cmpwi r3,0
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ld r0,STACKFRAMESIZE+16(r1)
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ld r3,STACKFRAMESIZE+48(r1)
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ld r4,STACKFRAMESIZE+56(r1)
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mtlr r0
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li r0,(PAGE_SIZE/128)
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mtctr r0
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beq .Lnonvmx_copy
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addi r1,r1,STACKFRAMESIZE
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li r6,16
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li r7,32
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li r8,48
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li r9,64
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li r10,80
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li r11,96
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li r12,112
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.align 5
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1: lvx vr7,r0,r4
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lvx vr6,r4,r6
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lvx vr5,r4,r7
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lvx vr4,r4,r8
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lvx vr3,r4,r9
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lvx vr2,r4,r10
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lvx vr1,r4,r11
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lvx vr0,r4,r12
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addi r4,r4,128
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stvx vr7,r0,r3
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stvx vr6,r3,r6
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stvx vr5,r3,r7
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stvx vr4,r3,r8
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stvx vr3,r3,r9
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stvx vr2,r3,r10
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stvx vr1,r3,r11
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stvx vr0,r3,r12
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addi r3,r3,128
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bdnz 1b
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b .exit_vmx_copy /* tail call optimise */
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#else
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li r0,(PAGE_SIZE/128)
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mtctr r0
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stdu r1,-STACKFRAMESIZE(r1)
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#endif
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.Lnonvmx_copy:
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std r14,STK_REG(R14)(r1)
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std r15,STK_REG(R15)(r1)
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std r16,STK_REG(R16)(r1)
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std r17,STK_REG(R17)(r1)
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std r18,STK_REG(R18)(r1)
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std r19,STK_REG(R19)(r1)
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std r20,STK_REG(R20)(r1)
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1: ld r0,0(r4)
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ld r5,8(r4)
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ld r6,16(r4)
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ld r7,24(r4)
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ld r8,32(r4)
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ld r9,40(r4)
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ld r10,48(r4)
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ld r11,56(r4)
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ld r12,64(r4)
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ld r14,72(r4)
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ld r15,80(r4)
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ld r16,88(r4)
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ld r17,96(r4)
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ld r18,104(r4)
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ld r19,112(r4)
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ld r20,120(r4)
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addi r4,r4,128
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std r0,0(r3)
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std r5,8(r3)
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std r6,16(r3)
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std r7,24(r3)
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std r8,32(r3)
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std r9,40(r3)
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std r10,48(r3)
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std r11,56(r3)
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std r12,64(r3)
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std r14,72(r3)
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std r15,80(r3)
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std r16,88(r3)
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std r17,96(r3)
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std r18,104(r3)
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std r19,112(r3)
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std r20,120(r3)
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addi r3,r3,128
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bdnz 1b
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ld r14,STK_REG(R14)(r1)
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ld r15,STK_REG(R15)(r1)
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ld r16,STK_REG(R16)(r1)
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ld r17,STK_REG(R17)(r1)
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ld r18,STK_REG(R18)(r1)
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ld r19,STK_REG(R19)(r1)
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ld r20,STK_REG(R20)(r1)
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addi r1,r1,STACKFRAMESIZE
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blr
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