diff options
Diffstat (limited to 'arch/arm26/lib')
45 files changed, 0 insertions, 4973 deletions
diff --git a/arch/arm26/lib/Makefile b/arch/arm26/lib/Makefile deleted file mode 100644 index 6df2b793d36..00000000000 --- a/arch/arm26/lib/Makefile +++ /dev/null @@ -1,26 +0,0 @@ -# -# linux/arch/arm26/lib/Makefile -# -# Copyright (C) 1995-2000 Russell King -# - -lib-y := backtrace.o changebit.o csumipv6.o csumpartial.o \ - csumpartialcopy.o csumpartialcopyuser.o clearbit.o \ - copy_page.o delay.o findbit.o memchr.o memcpy.o \ - memset.o memzero.o setbit.o \ - strchr.o strrchr.o testchangebit.o \ - testclearbit.o testsetbit.o getuser.o \ - putuser.o ashldi3.o ashrdi3.o lshrdi3.o muldi3.o \ - ucmpdi2.o udivdi3.o lib1funcs.o ecard.o io-acorn.o \ - floppydma.o io-readsb.o io-writesb.o io-writesl.o \ - uaccess-kernel.o uaccess-user.o io-readsw.o \ - io-writesw.o io-readsl.o ecard.o io-acorn.o \ - floppydma.o - -lib-n := - -lib-$(CONFIG_VT)+= kbd.o - -csumpartialcopy.o: csumpartialcopygeneric.S -csumpartialcopyuser.o: csumpartialcopygeneric.S - diff --git a/arch/arm26/lib/ashldi3.c b/arch/arm26/lib/ashldi3.c deleted file mode 100644 index 130f5a83966..00000000000 --- a/arch/arm26/lib/ashldi3.c +++ /dev/null @@ -1,61 +0,0 @@ -/* More subroutines needed by GCC output code on some machines. */ -/* Compile this one with gcc. */ -/* Copyright (C) 1989, 92-98, 1999 Free Software Foundation, Inc. - -This file is part of GNU CC. - -GNU CC is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2, or (at your option) -any later version. - -GNU CC is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. - -You should have received a copy of the GNU General Public License -along with GNU CC; see the file COPYING. If not, write to -the Free Software Foundation, 59 Temple Place - Suite 330, -Boston, MA 02111-1307, USA. */ - -/* As a special exception, if you link this library with other files, - some of which are compiled with GCC, to produce an executable, - this library does not by itself cause the resulting executable - to be covered by the GNU General Public License. - This exception does not however invalidate any other reasons why - the executable file might be covered by the GNU General Public License. - */ -/* support functions required by the kernel. based on code from gcc-2.95.3 */ -/* I Molton 29/07/01 */ - -#include "gcclib.h" - -DItype -__ashldi3 (DItype u, word_type b) -{ - DIunion w; - word_type bm; - DIunion uu; - - if (b == 0) - return u; - - uu.ll = u; - - bm = (sizeof (SItype) * BITS_PER_UNIT) - b; - if (bm <= 0) - { - w.s.low = 0; - w.s.high = (USItype)uu.s.low << -bm; - } - else - { - USItype carries = (USItype)uu.s.low >> bm; - w.s.low = (USItype)uu.s.low << b; - w.s.high = ((USItype)uu.s.high << b) | carries; - } - - return w.ll; -} - diff --git a/arch/arm26/lib/ashrdi3.c b/arch/arm26/lib/ashrdi3.c deleted file mode 100644 index 71625d218f8..00000000000 --- a/arch/arm26/lib/ashrdi3.c +++ /dev/null @@ -1,61 +0,0 @@ -/* More subroutines needed by GCC output code on some machines. */ -/* Compile this one with gcc. */ -/* Copyright (C) 1989, 92-98, 1999 Free Software Foundation, Inc. - -This file is part of GNU CC. - -GNU CC is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2, or (at your option) -any later version. - -GNU CC is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. - -You should have received a copy of the GNU General Public License -along with GNU CC; see the file COPYING. If not, write to -the Free Software Foundation, 59 Temple Place - Suite 330, -Boston, MA 02111-1307, USA. */ - -/* As a special exception, if you link this library with other files, - some of which are compiled with GCC, to produce an executable, - this library does not by itself cause the resulting executable - to be covered by the GNU General Public License. - This exception does not however invalidate any other reasons why - the executable file might be covered by the GNU General Public License. - */ -/* support functions required by the kernel. based on code from gcc-2.95.3 */ -/* I Molton 29/07/01 */ - -#include "gcclib.h" - -DItype -__ashrdi3 (DItype u, word_type b) -{ - DIunion w; - word_type bm; - DIunion uu; - - if (b == 0) - return u; - - uu.ll = u; - - bm = (sizeof (SItype) * BITS_PER_UNIT) - b; - if (bm <= 0) - { - /* w.s.high = 1..1 or 0..0 */ - w.s.high = uu.s.high >> (sizeof (SItype) * BITS_PER_UNIT - 1); - w.s.low = uu.s.high >> -bm; - } - else - { - USItype carries = (USItype)uu.s.high << bm; - w.s.high = uu.s.high >> b; - w.s.low = ((USItype)uu.s.low >> b) | carries; - } - - return w.ll; -} diff --git a/arch/arm26/lib/backtrace.S b/arch/arm26/lib/backtrace.S deleted file mode 100644 index e27feb1e891..00000000000 --- a/arch/arm26/lib/backtrace.S +++ /dev/null @@ -1,144 +0,0 @@ -/* - * linux/arch/arm26/lib/backtrace.S - * - * Copyright (C) 1995, 1996 Russell King - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ -#include <linux/linkage.h> -#include <asm/assembler.h> - .text - -@ fp is 0 or stack frame - -#define frame r4 -#define next r5 -#define save r6 -#define mask r7 -#define offset r8 - -ENTRY(__backtrace) - mov r1, #0x10 - mov r0, fp - -ENTRY(c_backtrace) - -#ifdef CONFIG_NO_FRAME_POINTER - mov pc, lr -#else - - stmfd sp!, {r4 - r8, lr} @ Save an extra register so we have a location... - mov mask, #0xfc000003 - tst mask, r0 - movne r0, #0 - movs frame, r0 -1: moveq r0, #-2 - LOADREGS(eqfd, sp!, {r4 - r8, pc}) - -2: stmfd sp!, {pc} @ calculate offset of PC in STMIA instruction - ldr r0, [sp], #4 - adr r1, 2b - 4 - sub offset, r0, r1 - -3: tst frame, mask @ Check for address exceptions... - bne 1b - -1001: ldr next, [frame, #-12] @ get fp -1002: ldr r2, [frame, #-4] @ get lr -1003: ldr r3, [frame, #0] @ get pc - sub save, r3, offset @ Correct PC for prefetching - bic save, save, mask -1004: ldr r1, [save, #0] @ get instruction at function - mov r1, r1, lsr #10 - ldr r3, .Ldsi+4 - teq r1, r3 - subeq save, save, #4 - adr r0, .Lfe - mov r1, save - bic r2, r2, mask - bl printk @ print pc and link register - - ldr r0, [frame, #-8] @ get sp - sub r0, r0, #4 -1005: ldr r1, [save, #4] @ get instruction at function+4 - mov r3, r1, lsr #10 - ldr r2, .Ldsi+4 - teq r3, r2 @ Check for stmia sp!, {args} - addeq save, save, #4 @ next instruction - bleq .Ldumpstm - - sub r0, frame, #16 -1006: ldr r1, [save, #4] @ Get 'stmia sp!, {rlist, fp, ip, lr, pc}' instruction - mov r3, r1, lsr #10 - ldr r2, .Ldsi - teq r3, r2 - bleq .Ldumpstm - - teq frame, next - movne frame, next - teqne frame, #0 - bne 3b - LOADREGS(fd, sp!, {r4 - r8, pc}) - -/* - * Fixup for LDMDB - */ - .section .fixup,"ax" - .align 0 -1007: ldr r0, =.Lbad - mov r1, frame - bl printk - LOADREGS(fd, sp!, {r4 - r8, pc}) - .ltorg - .previous - - .section __ex_table,"a" - .align 3 - .long 1001b, 1007b - .long 1002b, 1007b - .long 1003b, 1007b - .long 1004b, 1007b - .long 1005b, 1007b - .long 1006b, 1007b - .previous - -#define instr r4 -#define reg r5 -#define stack r6 - -.Ldumpstm: stmfd sp!, {instr, reg, stack, r7, lr} - mov stack, r0 - mov instr, r1 - mov reg, #9 - mov r7, #0 -1: mov r3, #1 - tst instr, r3, lsl reg - beq 2f - add r7, r7, #1 - teq r7, #4 - moveq r7, #0 - moveq r3, #'\n' - movne r3, #' ' - ldr r2, [stack], #-4 - mov r1, reg - adr r0, .Lfp - bl printk -2: subs reg, reg, #1 - bpl 1b - teq r7, #0 - adrne r0, .Lcr - blne printk - mov r0, stack - LOADREGS(fd, sp!, {instr, reg, stack, r7, pc}) - -.Lfe: .asciz "Function entered at [<%p>] from [<%p>]\n" -.Lfp: .asciz " r%d = %08X%c" -.Lcr: .asciz "\n" -.Lbad: .asciz "Backtrace aborted due to bad frame pointer <%p>\n" - .align -.Ldsi: .word 0x00e92dd8 >> 2 - .word 0x00e92d00 >> 2 - -#endif diff --git a/arch/arm26/lib/changebit.S b/arch/arm26/lib/changebit.S deleted file mode 100644 index 1b6a077be5a..00000000000 --- a/arch/arm26/lib/changebit.S +++ /dev/null @@ -1,28 +0,0 @@ -/* - * linux/arch/arm26/lib/changebit.S - * - * Copyright (C) 1995-1996 Russell King - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ -#include <linux/linkage.h> -#include <asm/assembler.h> - .text - -/* Purpose : Function to change a bit - * Prototype: int change_bit(int bit, void *addr) - */ -ENTRY(_change_bit_be) - eor r0, r0, #0x18 @ big endian byte ordering -ENTRY(_change_bit_le) - and r2, r0, #7 - mov r3, #1 - mov r3, r3, lsl r2 - save_and_disable_irqs ip, r2 - ldrb r2, [r1, r0, lsr #3] - eor r2, r2, r3 - strb r2, [r1, r0, lsr #3] - restore_irqs ip - RETINSTR(mov,pc,lr) diff --git a/arch/arm26/lib/clearbit.S b/arch/arm26/lib/clearbit.S deleted file mode 100644 index 0a895b0c759..00000000000 --- a/arch/arm26/lib/clearbit.S +++ /dev/null @@ -1,31 +0,0 @@ -/* - * linux/arch/arm26/lib/clearbit.S - * - * Copyright (C) 1995-1996 Russell King - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ -#include <linux/linkage.h> -#include <asm/assembler.h> - .text - -/* - * Purpose : Function to clear a bit - * Prototype: int clear_bit(int bit, void *addr) - */ -ENTRY(_clear_bit_be) - eor r0, r0, #0x18 @ big endian byte ordering -ENTRY(_clear_bit_le) - and r2, r0, #7 - mov r3, #1 - mov r3, r3, lsl r2 - save_and_disable_irqs ip, r2 - ldrb r2, [r1, r0, lsr #3] - bic r2, r2, r3 - strb r2, [r1, r0, lsr #3] - restore_irqs ip - RETINSTR(mov,pc,lr) - - diff --git a/arch/arm26/lib/copy_page.S b/arch/arm26/lib/copy_page.S deleted file mode 100644 index c7511a2739d..00000000000 --- a/arch/arm26/lib/copy_page.S +++ /dev/null @@ -1,62 +0,0 @@ -/* - * linux/arch/arm26/lib/copypage.S - * - * Copyright (C) 1995-1999 Russell King - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * ASM optimised string functions - */ -#include <linux/linkage.h> -#include <asm/assembler.h> -#include <asm/asm-offsets.h> - - .text - .align 5 -/* - * ARMv3 optimised copy_user_page - * - * FIXME: rmk do we need to handle cache stuff... - * FIXME: im is this right on ARM26? - */ -ENTRY(__copy_user_page) - stmfd sp!, {r4, lr} @ 2 - mov r2, #PAGE_SZ/64 @ 1 - ldmia r1!, {r3, r4, ip, lr} @ 4+1 -1: stmia r0!, {r3, r4, ip, lr} @ 4 - ldmia r1!, {r3, r4, ip, lr} @ 4+1 - stmia r0!, {r3, r4, ip, lr} @ 4 - ldmia r1!, {r3, r4, ip, lr} @ 4+1 - stmia r0!, {r3, r4, ip, lr} @ 4 - ldmia r1!, {r3, r4, ip, lr} @ 4 - subs r2, r2, #1 @ 1 - stmia r0!, {r3, r4, ip, lr} @ 4 - ldmneia r1!, {r3, r4, ip, lr} @ 4 - bne 1b @ 1 - LOADREGS(fd, sp!, {r4, pc}) @ 3 - - .align 5 -/* - * ARMv3 optimised clear_user_page - * - * FIXME: rmk do we need to handle cache stuff... - */ -ENTRY(__clear_user_page) - str lr, [sp, #-4]! - mov r1, #PAGE_SZ/64 @ 1 - mov r2, #0 @ 1 - mov r3, #0 @ 1 - mov ip, #0 @ 1 - mov lr, #0 @ 1 -1: stmia r0!, {r2, r3, ip, lr} @ 4 - stmia r0!, {r2, r3, ip, lr} @ 4 - stmia r0!, {r2, r3, ip, lr} @ 4 - stmia r0!, {r2, r3, ip, lr} @ 4 - subs r1, r1, #1 @ 1 - bne 1b @ 1 - ldr pc, [sp], #4 - - .section ".init.text", #alloc, #execinstr - diff --git a/arch/arm26/lib/csumipv6.S b/arch/arm26/lib/csumipv6.S deleted file mode 100644 index 62831155acd..00000000000 --- a/arch/arm26/lib/csumipv6.S +++ /dev/null @@ -1,32 +0,0 @@ -/* - * linux/arch/arm26/lib/csumipv6.S - * - * Copyright (C) 1995-1998 Russell King - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ -#include <linux/linkage.h> -#include <asm/assembler.h> - - .text - -ENTRY(__csum_ipv6_magic) - str lr, [sp, #-4]! - adds ip, r2, r3 - ldmia r1, {r1 - r3, lr} - adcs ip, ip, r1 - adcs ip, ip, r2 - adcs ip, ip, r3 - adcs ip, ip, lr - ldmia r0, {r0 - r3} - adcs r0, ip, r0 - adcs r0, r0, r1 - adcs r0, r0, r2 - ldr r2, [sp, #4] - adcs r0, r0, r3 - adcs r0, r0, r2 - adcs r0, r0, #0 - LOADREGS(fd, sp!, {pc}) - diff --git a/arch/arm26/lib/csumpartial.S b/arch/arm26/lib/csumpartial.S deleted file mode 100644 index e53e7109e62..00000000000 --- a/arch/arm26/lib/csumpartial.S +++ /dev/null @@ -1,130 +0,0 @@ -/* - * linux/arch/arm26/lib/csumpartial.S - * - * Copyright (C) 1995-1998 Russell King - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ -#include <linux/linkage.h> -#include <asm/assembler.h> - - .text - -/* - * Function: __u32 csum_partial(const char *src, int len, __u32 sum) - * Params : r0 = buffer, r1 = len, r2 = checksum - * Returns : r0 = new checksum - */ - -buf .req r0 -len .req r1 -sum .req r2 -td0 .req r3 -td1 .req r4 @ save before use -td2 .req r5 @ save before use -td3 .req lr - -.zero: mov r0, sum - add sp, sp, #4 - ldr pc, [sp], #4 - - /* - * Handle 0 to 7 bytes, with any alignment of source and - * destination pointers. Note that when we get here, C = 0 - */ -.less8: teq len, #0 @ check for zero count - beq .zero - - /* we must have at least one byte. */ - tst buf, #1 @ odd address? - ldrneb td0, [buf], #1 - subne len, len, #1 - adcnes sum, sum, td0, lsl #byte(1) - -.less4: tst len, #6 - beq .less8_byte - - /* we are now half-word aligned */ - -.less8_wordlp: -#if __LINUX_ARM_ARCH__ >= 4 - ldrh td0, [buf], #2 - sub len, len, #2 -#else - ldrb td0, [buf], #1 - ldrb td3, [buf], #1 - sub len, len, #2 - orr td0, td0, td3, lsl #8 -#endif - adcs sum, sum, td0 - tst len, #6 - bne .less8_wordlp - -.less8_byte: tst len, #1 @ odd number of bytes - ldrneb td0, [buf], #1 @ include last byte - adcnes sum, sum, td0, lsl #byte(0) @ update checksum - -.done: adc r0, sum, #0 @ collect up the last carry - ldr td0, [sp], #4 - tst td0, #1 @ check buffer alignment - movne td0, r0, lsl #8 @ rotate checksum by 8 bits - orrne r0, td0, r0, lsr #24 - ldr pc, [sp], #4 @ return - -.not_aligned: tst buf, #1 @ odd address - ldrneb td0, [buf], #1 @ make even - subne len, len, #1 - adcnes sum, sum, td0, lsl #byte(1) @ update checksum - - tst buf, #2 @ 32-bit aligned? -#if __LINUX_ARM_ARCH__ >= 4 - ldrneh td0, [buf], #2 @ make 32-bit aligned - subne len, len, #2 -#else - ldrneb td0, [buf], #1 - ldrneb ip, [buf], #1 - subne len, len, #2 - orrne td0, td0, ip, lsl #8 -#endif - adcnes sum, sum, td0 @ update checksum - mov pc, lr - -ENTRY(csum_partial) - stmfd sp!, {buf, lr} - cmp len, #8 @ Ensure that we have at least - blo .less8 @ 8 bytes to copy. - - adds sum, sum, #0 @ C = 0 - tst buf, #3 @ Test destination alignment - blne .not_aligned @ aligh destination, return here - -1: bics ip, len, #31 - beq 3f - - stmfd sp!, {r4 - r5} -2: ldmia buf!, {td0, td1, td2, td3} - adcs sum, sum, td0 - adcs sum, sum, td1 - adcs sum, sum, td2 - adcs sum, sum, td3 - ldmia buf!, {td0, td1, td2, td3} - adcs sum, sum, td0 - adcs sum, sum, td1 - adcs sum, sum, td2 - adcs sum, sum, td3 - sub ip, ip, #32 - teq ip, #0 - bne 2b - ldmfd sp!, {r4 - r5} - -3: tst len, #0x1c @ should not change C - beq .less4 - -4: ldr td0, [buf], #4 - sub len, len, #4 - adcs sum, sum, td0 - tst len, #0x1c - bne 4b - b .less4 diff --git a/arch/arm26/lib/csumpartialcopy.S b/arch/arm26/lib/csumpartialcopy.S deleted file mode 100644 index a1c4b5fdd49..00000000000 --- a/arch/arm26/lib/csumpartialcopy.S +++ /dev/null @@ -1,52 +0,0 @@ -/* - * linux/arch/arm26/lib/csumpartialcopy.S - * - * Copyright (C) 1995-1998 Russell King - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ -#include <linux/linkage.h> -#include <asm/assembler.h> - - .text - -/* Function: __u32 csum_partial_copy_nocheck(const char *src, char *dst, int len, __u32 sum) - * Params : r0 = src, r1 = dst, r2 = len, r3 = checksum - * Returns : r0 = new checksum - */ - - .macro save_regs - stmfd sp!, {r1, r4 - r8, fp, ip, lr, pc} - .endm - - .macro load_regs,flags - LOADREGS(\flags,fp,{r1, r4 - r8, fp, sp, pc}) - .endm - - .macro load1b, reg1 - ldrb \reg1, [r0], #1 - .endm - - .macro load2b, reg1, reg2 - ldrb \reg1, [r0], #1 - ldrb \reg2, [r0], #1 - .endm - - .macro load1l, reg1 - ldr \reg1, [r0], #4 - .endm - - .macro load2l, reg1, reg2 - ldr \reg1, [r0], #4 - ldr \reg2, [r0], #4 - .endm - - .macro load4l, reg1, reg2, reg3, reg4 - ldmia r0!, {\reg1, \reg2, \reg3, \reg4} - .endm - -#define FN_ENTRY ENTRY(csum_partial_copy_nocheck) - -#include "csumpartialcopygeneric.S" diff --git a/arch/arm26/lib/csumpartialcopygeneric.S b/arch/arm26/lib/csumpartialcopygeneric.S deleted file mode 100644 index 5249c3ad11d..00000000000 --- a/arch/arm26/lib/csumpartialcopygeneric.S +++ /dev/null @@ -1,352 +0,0 @@ -/* - * linux/arch/arm26/lib/csumpartialcopygeneric.S - * - * Copyright (C) 1995-2001 Russell King - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * JMA 01/06/03 Commented out some shl0s; probobly irrelevant to arm26 - * - */ - -/* - * unsigned int - * csum_partial_copy_xxx(const char *src, char *dst, int len, int sum, ) - * r0 = src, r1 = dst, r2 = len, r3 = sum - * Returns : r0 = checksum - * - * Note that 'tst' and 'teq' preserve the carry flag. - */ - -/* Quick hack */ - .macro save_regs - stmfd sp!, {r1, r4 - r8, fp, ip, lr, pc} - .endm - -/* end Quick Hack */ - -src .req r0 -dst .req r1 -len .req r2 -sum .req r3 - -.zero: mov r0, sum - load_regs ea - - /* - * Align an unaligned destination pointer. We know that - * we have >= 8 bytes here, so we don't need to check - * the length. Note that the source pointer hasn't been - * aligned yet. - */ -.dst_unaligned: tst dst, #1 - beq .dst_16bit - - load1b ip - sub len, len, #1 - adcs sum, sum, ip, lsl #byte(1) @ update checksum - strb ip, [dst], #1 - tst dst, #2 - moveq pc, lr @ dst is now 32bit aligned - -.dst_16bit: load2b r8, ip - sub len, len, #2 - adcs sum, sum, r8, lsl #byte(0) - strb r8, [dst], #1 - adcs sum, sum, ip, lsl #byte(1) - strb ip, [dst], #1 - mov pc, lr @ dst is now 32bit aligned - - /* - * Handle 0 to 7 bytes, with any alignment of source and - * destination pointers. Note that when we get here, C = 0 - */ -.less8: teq len, #0 @ check for zero count - beq .zero - - /* we must have at least one byte. */ - tst dst, #1 @ dst 16-bit aligned - beq .less8_aligned - - /* Align dst */ - load1b ip - sub len, len, #1 - adcs sum, sum, ip, lsl #byte(1) @ update checksum - strb ip, [dst], #1 - tst len, #6 - beq .less8_byteonly - -1: load2b r8, ip - sub len, len, #2 - adcs sum, sum, r8, lsl #byte(0) - strb r8, [dst], #1 - adcs sum, sum, ip, lsl #byte(1) - strb ip, [dst], #1 -.less8_aligned: tst len, #6 - bne 1b -.less8_byteonly: - tst len, #1 - beq .done - load1b r8 - adcs sum, sum, r8, lsl #byte(0) @ update checksum - strb r8, [dst], #1 - b .done - -FN_ENTRY - mov ip, sp - save_regs - sub fp, ip, #4 - - cmp len, #8 @ Ensure that we have at least - blo .less8 @ 8 bytes to copy. - - adds sum, sum, #0 @ C = 0 - tst dst, #3 @ Test destination alignment - blne .dst_unaligned @ align destination, return here - - /* - * Ok, the dst pointer is now 32bit aligned, and we know - * that we must have more than 4 bytes to copy. Note - * that C contains the carry from the dst alignment above. - */ - - tst src, #3 @ Test source alignment - bne .src_not_aligned - - /* Routine for src & dst aligned */ - - bics ip, len, #15 - beq 2f - -1: load4l r4, r5, r6, r7 - stmia dst!, {r4, r5, r6, r7} - adcs sum, sum, r4 - adcs sum, sum, r5 - adcs sum, sum, r6 - adcs sum, sum, r7 - sub ip, ip, #16 - teq ip, #0 - bne 1b - -2: ands ip, len, #12 - beq 4f - tst ip, #8 - beq 3f - load2l r4, r5 - stmia dst!, {r4, r5} - adcs sum, sum, r4 - adcs sum, sum, r5 - tst ip, #4 - beq 4f - -3: load1l r4 - str r4, [dst], #4 - adcs sum, sum, r4 - -4: ands len, len, #3 - beq .done - load1l r4 - tst len, #2 -/* mov r5, r4, lsr #byte(0) -FIXME? 0 Shift anyhow! -*/ - beq .exit - adcs sum, sum, r4, push #16 - strb r5, [dst], #1 - mov r5, r4, lsr #byte(1) - strb r5, [dst], #1 - mov r5, r4, lsr #byte(2) -.exit: tst len, #1 - strneb r5, [dst], #1 - andne r5, r5, #255 - adcnes sum, sum, r5, lsl #byte(0) - - /* - * If the dst pointer was not 16-bit aligned, we - * need to rotate the checksum here to get around - * the inefficient byte manipulations in the - * architecture independent code. - */ -.done: adc r0, sum, #0 - |