diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/microblaze/lib/uaccess_old.S')
| -rw-r--r-- | ANDROID_3.4.5/arch/microblaze/lib/uaccess_old.S | 267 |
1 files changed, 0 insertions, 267 deletions
diff --git a/ANDROID_3.4.5/arch/microblaze/lib/uaccess_old.S b/ANDROID_3.4.5/arch/microblaze/lib/uaccess_old.S deleted file mode 100644 index f085995e..00000000 --- a/ANDROID_3.4.5/arch/microblaze/lib/uaccess_old.S +++ /dev/null @@ -1,267 +0,0 @@ -/* - * Copyright (C) 2009 Michal Simek <monstr@monstr.eu> - * Copyright (C) 2009 PetaLogix - * Copyright (C) 2007 LynuxWorks, Inc. - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - */ - -#include <linux/errno.h> -#include <linux/linkage.h> -#include <asm/page.h> - -/* - * int __strncpy_user(char *to, char *from, int len); - * - * Returns: - * -EFAULT for an exception - * len if we hit the buffer limit - * bytes copied - */ - - .text -.globl __strncpy_user; -.type __strncpy_user, @function -.align 4; -__strncpy_user: - - /* - * r5 - to - * r6 - from - * r7 - len - * r3 - temp count - * r4 - temp val - */ - beqid r7,3f - addik r3,r7,0 /* temp_count = len */ -1: - lbu r4,r6,r0 - sb r4,r5,r0 - - addik r3,r3,-1 - beqi r3,2f /* break on len */ - - addik r5,r5,1 - bneid r4,1b - addik r6,r6,1 /* delay slot */ - addik r3,r3,1 /* undo "temp_count--" */ -2: - rsubk r3,r3,r7 /* temp_count = len - temp_count */ -3: - rtsd r15,8 - nop - .size __strncpy_user, . - __strncpy_user - - .section .fixup, "ax" - .align 2 -4: - brid 3b - addik r3,r0, -EFAULT - - .section __ex_table, "a" - .word 1b,4b - -/* - * int __strnlen_user(char __user *str, int maxlen); - * - * Returns: - * 0 on error - * maxlen + 1 if no NUL byte found within maxlen bytes - * size of the string (including NUL byte) - */ - - .text -.globl __strnlen_user; -.type __strnlen_user, @function -.align 4; -__strnlen_user: - beqid r6,3f - addik r3,r6,0 -1: - lbu r4,r5,r0 - beqid r4,2f /* break on NUL */ - addik r3,r3,-1 /* delay slot */ - - bneid r3,1b - addik r5,r5,1 /* delay slot */ - - addik r3,r3,-1 /* for break on len */ -2: - rsubk r3,r3,r6 -3: - rtsd r15,8 - nop - .size __strnlen_user, . - __strnlen_user - - .section .fixup,"ax" -4: - brid 3b - addk r3,r0,r0 - - .section __ex_table,"a" - .word 1b,4b - -/* Loop unrolling for __copy_tofrom_user */ -#define COPY(offset) \ -1: lwi r4 , r6, 0x0000 + offset; \ -2: lwi r19, r6, 0x0004 + offset; \ -3: lwi r20, r6, 0x0008 + offset; \ -4: lwi r21, r6, 0x000C + offset; \ -5: lwi r22, r6, 0x0010 + offset; \ -6: lwi r23, r6, 0x0014 + offset; \ -7: lwi r24, r6, 0x0018 + offset; \ -8: lwi r25, r6, 0x001C + offset; \ -9: swi r4 , r5, 0x0000 + offset; \ -10: swi r19, r5, 0x0004 + offset; \ -11: swi r20, r5, 0x0008 + offset; \ -12: swi r21, r5, 0x000C + offset; \ -13: swi r22, r5, 0x0010 + offset; \ -14: swi r23, r5, 0x0014 + offset; \ -15: swi r24, r5, 0x0018 + offset; \ -16: swi r25, r5, 0x001C + offset; \ - .section __ex_table,"a"; \ - .word 1b, 33f; \ - .word 2b, 33f; \ - .word 3b, 33f; \ - .word 4b, 33f; \ - .word 5b, 33f; \ - .word 6b, 33f; \ - .word 7b, 33f; \ - .word 8b, 33f; \ - .word 9b, 33f; \ - .word 10b, 33f; \ - .word 11b, 33f; \ - .word 12b, 33f; \ - .word 13b, 33f; \ - .word 14b, 33f; \ - .word 15b, 33f; \ - .word 16b, 33f; \ - .text - -#define COPY_80(offset) \ - COPY(0x00 + offset);\ - COPY(0x20 + offset);\ - COPY(0x40 + offset);\ - COPY(0x60 + offset); - -/* - * int __copy_tofrom_user(char *to, char *from, int len) - * Return: - * 0 on success - * number of not copied bytes on error - */ - .text -.globl __copy_tofrom_user; -.type __copy_tofrom_user, @function -.align 4; -__copy_tofrom_user: - /* - * r5 - to - * r6 - from - * r7, r3 - count - * r4 - tempval - */ - beqid r7, 0f /* zero size is not likely */ - or r3, r5, r6 /* find if is any to/from unaligned */ - or r3, r3, r7 /* find if count is unaligned */ - andi r3, r3, 0x3 /* mask last 3 bits */ - bneid r3, bu1 /* if r3 is not zero then byte copying */ - or r3, r0, r0 - - rsubi r3, r7, PAGE_SIZE /* detect PAGE_SIZE */ - beqid r3, page; - or r3, r0, r0 - -w1: lw r4, r6, r3 /* at least one 4 byte copy */ -w2: sw r4, r5, r3 - addik r7, r7, -4 - bneid r7, w1 - addik r3, r3, 4 - addik r3, r7, 0 - rtsd r15, 8 - nop - - .section __ex_table,"a" - .word w1, 0f; - .word w2, 0f; - .text - -.align 4 /* Alignment is important to keep icache happy */ -page: /* Create room on stack and save registers for storign values */ - addik r1, r1, -40 - swi r5, r1, 0 - swi r6, r1, 4 - swi r7, r1, 8 - swi r19, r1, 12 - swi r20, r1, 16 - swi r21, r1, 20 - swi r22, r1, 24 - swi r23, r1, 28 - swi r24, r1, 32 - swi r25, r1, 36 -loop: /* r4, r19, r20, r21, r22, r23, r24, r25 are used for storing values */ - /* Loop unrolling to get performance boost */ - COPY_80(0x000); - COPY_80(0x080); - COPY_80(0x100); - COPY_80(0x180); - /* copy loop */ - addik r6, r6, 0x200 - addik r7, r7, -0x200 - bneid r7, loop - addik r5, r5, 0x200 - - /* Restore register content */ - lwi r5, r1, 0 - lwi r6, r1, 4 - lwi r7, r1, 8 - lwi r19, r1, 12 - lwi r20, r1, 16 - lwi r21, r1, 20 - lwi r22, r1, 24 - lwi r23, r1, 28 - lwi r24, r1, 32 - lwi r25, r1, 36 - addik r1, r1, 40 - /* return back */ - addik r3, r0, 0 - rtsd r15, 8 - nop - -/* Fault case - return temp count */ -33: - addik r3, r7, 0 - /* Restore register content */ - lwi r5, r1, 0 - lwi r6, r1, 4 - lwi r7, r1, 8 - lwi r19, r1, 12 - lwi r20, r1, 16 - lwi r21, r1, 20 - lwi r22, r1, 24 - lwi r23, r1, 28 - lwi r24, r1, 32 - lwi r25, r1, 36 - addik r1, r1, 40 - /* return back */ - rtsd r15, 8 - nop - -.align 4 /* Alignment is important to keep icache happy */ -bu1: lbu r4,r6,r3 -bu2: sb r4,r5,r3 - addik r7,r7,-1 - bneid r7,bu1 - addik r3,r3,1 /* delay slot */ -0: - addik r3,r7,0 - rtsd r15,8 - nop - .size __copy_tofrom_user, . - __copy_tofrom_user - - .section __ex_table,"a" - .word bu1, 0b; - .word bu2, 0b; - .text |