| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * linux/arch/unicore32/lib/copy_page.S |
| * |
| * Code specific to PKUnity SoC and UniCore ISA |
| * |
| * Copyright (C) 2001-2010 GUAN Xue-tao |
| * |
| * ASM optimised string functions |
| */ |
| #include <linux/linkage.h> |
| #include <asm/assembler.h> |
| #include <generated/asm-offsets.h> |
| #include <asm/cache.h> |
| |
| #define COPY_COUNT (PAGE_SZ/256) |
| |
| .text |
| .align 5 |
| /* |
| * UniCore optimised copy_page routine |
| */ |
| ENTRY(copy_page) |
| stm.w (r17 - r19, lr), [sp-] |
| mov r17, r0 |
| mov r18, r1 |
| mov r19, #COPY_COUNT |
| 1: |
| .rept 4 |
| ldm.w (r0 - r15), [r18]+ |
| stm.w (r0 - r15), [r17]+ |
| .endr |
| sub.a r19, r19, #1 |
| bne 1b |
| ldm.w (r17 - r19, pc), [sp]+ |
| ENDPROC(copy_page) |
