| /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| /* |
| * |
| * Copyright (C) IBM Corporation, 2012 |
| * |
| * Author: Anton Blanchard <anton@au.ibm.com> |
| */ |
| #include <asm/page.h> |
| #include <asm/ppc_asm.h> |
| |
| _GLOBAL(copypage_power7) |
| /* |
| * We prefetch both the source and destination using enhanced touch |
| * instructions. We use a stream ID of 0 for the load side and |
| * 1 for the store side. Since source and destination are page |
| * aligned we don't need to clear the bottom 7 bits of either |
| * address. |
| */ |
| ori r9,r3,1 /* stream=1 => to */ |
| |
| #ifdef CONFIG_PPC_64K_PAGES |
| lis r7,0x0E01 /* depth=7 |
| * units/cachelines=512 */ |
| #else |
| lis r7,0x0E00 /* depth=7 */ |
| ori r7,r7,0x1000 /* units/cachelines=32 */ |
| #endif |
| ori r10,r7,1 /* stream=1 */ |
| |
| lis r8,0x8000 /* GO=1 */ |
| clrldi r8,r8,32 |
| |
| /* setup read stream 0 */ |
| dcbt 0,r4,0b01000 /* addr from */ |
| dcbt 0,r7,0b01010 /* length and depth from */ |
| /* setup write stream 1 */ |
| dcbtst 0,r9,0b01000 /* addr to */ |
| dcbtst 0,r10,0b01010 /* length and depth to */ |
| eieio |
| dcbt 0,r8,0b01010 /* all streams GO */ |
| |
| #ifdef CONFIG_ALTIVEC |
| mflr r0 |
| std r3,-STACKFRAMESIZE+STK_REG(R31)(r1) |
| std r4,-STACKFRAMESIZE+STK_REG(R30)(r1) |
| std r0,16(r1) |
| stdu r1,-STACKFRAMESIZE(r1) |
| bl enter_vmx_ops |
| cmpwi r3,0 |
| ld r0,STACKFRAMESIZE+16(r1) |
| ld r3,STK_REG(R31)(r1) |
| ld r4,STK_REG(R30)(r1) |
| mtlr r0 |
| |
| li r0,(PAGE_SIZE/128) |
| mtctr r0 |
| |
| beq .Lnonvmx_copy |
| |
| addi r1,r1,STACKFRAMESIZE |
| |
| li r6,16 |
| li r7,32 |
| li r8,48 |
| li r9,64 |
| li r10,80 |
| li r11,96 |
| li r12,112 |
| |
| .align 5 |
| 1: lvx v7,0,r4 |
| lvx v6,r4,r6 |
| lvx v5,r4,r7 |
| lvx v4,r4,r8 |
| lvx v3,r4,r9 |
| lvx v2,r4,r10 |
| lvx v1,r4,r11 |
| lvx v0,r4,r12 |
| addi r4,r4,128 |
| stvx v7,0,r3 |
| stvx v6,r3,r6 |
| stvx v5,r3,r7 |
| stvx v4,r3,r8 |
| stvx v3,r3,r9 |
| stvx v2,r3,r10 |
| stvx v1,r3,r11 |
| stvx v0,r3,r12 |
| addi r3,r3,128 |
| bdnz 1b |
| |
| b exit_vmx_ops /* tail call optimise */ |
| |
| #else |
| li r0,(PAGE_SIZE/128) |
| mtctr r0 |
| |
| stdu r1,-STACKFRAMESIZE(r1) |
| #endif |
| |
| .Lnonvmx_copy: |
| std r14,STK_REG(R14)(r1) |
| std r15,STK_REG(R15)(r1) |
| std r16,STK_REG(R16)(r1) |
| std r17,STK_REG(R17)(r1) |
| std r18,STK_REG(R18)(r1) |
| std r19,STK_REG(R19)(r1) |
| std r20,STK_REG(R20)(r1) |
| |
| 1: ld r0,0(r4) |
| ld r5,8(r4) |
| ld r6,16(r4) |
| ld r7,24(r4) |
| ld r8,32(r4) |
| ld r9,40(r4) |
| ld r10,48(r4) |
| ld r11,56(r4) |
| ld r12,64(r4) |
| ld r14,72(r4) |
| ld r15,80(r4) |
| ld r16,88(r4) |
| ld r17,96(r4) |
| ld r18,104(r4) |
| ld r19,112(r4) |
| ld r20,120(r4) |
| addi r4,r4,128 |
| std r0,0(r3) |
| std r5,8(r3) |
| std r6,16(r3) |
| std r7,24(r3) |
| std r8,32(r3) |
| std r9,40(r3) |
| std r10,48(r3) |
| std r11,56(r3) |
| std r12,64(r3) |
| std r14,72(r3) |
| std r15,80(r3) |
| std r16,88(r3) |
| std r17,96(r3) |
| std r18,104(r3) |
| std r19,112(r3) |
| std r20,120(r3) |
| addi r3,r3,128 |
| bdnz 1b |
| |
| ld r14,STK_REG(R14)(r1) |
| ld r15,STK_REG(R15)(r1) |
| ld r16,STK_REG(R16)(r1) |
| ld r17,STK_REG(R17)(r1) |
| ld r18,STK_REG(R18)(r1) |
| ld r19,STK_REG(R19)(r1) |
| ld r20,STK_REG(R20)(r1) |
| addi r1,r1,STACKFRAMESIZE |
| blr |
