1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * linux/arch/arm/lib/csumpartialcopy.S 4 * 5 * Copyright (C) 1995-1998 Russell King 6 */ 7 #include <linux/linkage.h> 8 #include <asm/assembler.h> 9 10 .text 11 12 /* Function: __u32 csum_partial_copy_nocheck(const char *src, char *dst, int len) 13 * Params : r0 = src, r1 = dst, r2 = len 14 * Returns : r0 = new checksum 15 */ 16 17 .macro save_regs 18 stmfd sp!, {r1, r4 - r8, lr} 19 .endm 20 21 .macro load_regs 22 ldmfd sp!, {r1, r4 - r8, pc} 23 .endm 24 25 .macro load1b, reg1 26 ldrb \reg1, [r0], #1 27 .endm 28 29 .macro load2b, reg1, reg2 30 ldrb \reg1, [r0], #1 31 ldrb \reg2, [r0], #1 32 .endm 33 34 .macro load1l, reg1 35 ldr \reg1, [r0], #4 36 .endm 37 38 .macro load2l, reg1, reg2 39 ldr \reg1, [r0], #4 40 ldr \reg2, [r0], #4 41 .endm 42 43 .macro load4l, reg1, reg2, reg3, reg4 44 ldmia r0!, {\reg1, \reg2, \reg3, \reg4} 45 .endm 46 47 #define FN_ENTRY ENTRY(csum_partial_copy_nocheck) 48 #define FN_EXIT ENDPROC(csum_partial_copy_nocheck) 49 50 #include "csumpartialcopygeneric.S" 51