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authorMichal Simek <monstr@monstr.eu>2009-03-27 14:25:21 +0100
committerMichal Simek <monstr@monstr.eu>2009-03-27 14:25:21 +0100
commit322ae8eb91c1730728400c5b8dd1108aef1205b8 (patch)
treed5c74be5b85ba2938f98172e72727b31fc214eaa /arch/microblaze/lib
parent16bfeaf23ead78d937b3eacfb5c7cdc7bff6d3da (diff)
downloadlinux-322ae8eb91c1730728400c5b8dd1108aef1205b8.tar.gz
microblaze_v8: supported function for memory - kernel/lib
Reviewed-by: Ingo Molnar <mingo@elte.hu> Acked-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Acked-by: John Linn <john.linn@xilinx.com> Acked-by: John Williams <john.williams@petalogix.com> Signed-off-by: Michal Simek <monstr@monstr.eu>
Diffstat (limited to 'arch/microblaze/lib')
-rw-r--r--arch/microblaze/lib/fastcopy.S662
-rw-r--r--arch/microblaze/lib/memcpy.c161
-rw-r--r--arch/microblaze/lib/memmove.c175
-rw-r--r--arch/microblaze/lib/memset.c82
4 files changed, 1080 insertions, 0 deletions
diff --git a/arch/microblaze/lib/fastcopy.S b/arch/microblaze/lib/fastcopy.S
new file mode 100644
index 00000000000..02e3ab4eddf
--- /dev/null
+++ b/arch/microblaze/lib/fastcopy.S
@@ -0,0 +1,662 @@
+/*
+ * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2008-2009 PetaLogix
+ * Copyright (C) 2008 Jim Law - Iris LP All rights reserved.
+ *
+ * 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.
+ *
+ * Written by Jim Law <jlaw@irispower.com>
+ *
+ * intended to replace:
+ * memcpy in memcpy.c and
+ * memmove in memmove.c
+ * ... in arch/microblaze/lib
+ *
+ *
+ * assly_fastcopy.S
+ *
+ * Attempt at quicker memcpy and memmove for MicroBlaze
+ * Input : Operand1 in Reg r5 - destination address
+ * Operand2 in Reg r6 - source address
+ * Operand3 in Reg r7 - number of bytes to transfer
+ * Output: Result in Reg r3 - starting destinaition address
+ *
+ *
+ * Explanation:
+ * Perform (possibly unaligned) copy of a block of memory
+ * between mem locations with size of xfer spec'd in bytes
+ */
+
+#include <linux/linkage.h>
+
+ .globl memcpy
+ .ent memcpy
+
+memcpy:
+fast_memcpy_ascending:
+ /* move d to return register as value of function */
+ addi r3, r5, 0
+
+ addi r4, r0, 4 /* n = 4 */
+ cmpu r4, r4, r7 /* n = c - n (unsigned) */
+ blti r4, a_xfer_end /* if n < 0, less than one word to transfer */
+
+ /* transfer first 0~3 bytes to get aligned dest address */
+ andi r4, r5, 3 /* n = d & 3 */
+ /* if zero, destination already aligned */
+ beqi r4, a_dalign_done
+ /* n = 4 - n (yields 3, 2, 1 transfers for 1, 2, 3 addr offset) */
+ rsubi r4, r4, 4
+ rsub r7, r4, r7 /* c = c - n adjust c */
+
+a_xfer_first_loop:
+ /* if no bytes left to transfer, transfer the bulk */
+ beqi r4, a_dalign_done
+ lbui r11, r6, 0 /* h = *s */
+ sbi r11, r5, 0 /* *d = h */
+ addi r6, r6, 1 /* s++ */
+ addi r5, r5, 1 /* d++ */
+ brid a_xfer_first_loop /* loop */
+ addi r4, r4, -1 /* n-- (IN DELAY SLOT) */
+
+a_dalign_done:
+ addi r4, r0, 32 /* n = 32 */
+ cmpu r4, r4, r7 /* n = c - n (unsigned) */
+ /* if n < 0, less than one block to transfer */
+ blti r4, a_block_done
+
+a_block_xfer:
+ andi r4, r7, 0xffffffe0 /* n = c & ~31 */
+ rsub r7, r4, r7 /* c = c - n */
+
+ andi r9, r6, 3 /* t1 = s & 3 */
+ /* if temp != 0, unaligned transfers needed */
+ bnei r9, a_block_unaligned
+
+a_block_aligned:
+ lwi r9, r6, 0 /* t1 = *(s + 0) */
+ lwi r10, r6, 4 /* t2 = *(s + 4) */
+ lwi r11, r6, 8 /* t3 = *(s + 8) */
+ lwi r12, r6, 12 /* t4 = *(s + 12) */
+ swi r9, r5, 0 /* *(d + 0) = t1 */
+ swi r10, r5, 4 /* *(d + 4) = t2 */
+ swi r11, r5, 8 /* *(d + 8) = t3 */
+ swi r12, r5, 12 /* *(d + 12) = t4 */
+ lwi r9, r6, 16 /* t1 = *(s + 16) */
+ lwi r10, r6, 20 /* t2 = *(s + 20) */
+ lwi r11, r6, 24 /* t3 = *(s + 24) */
+ lwi r12, r6, 28 /* t4 = *(s + 28) */
+ swi r9, r5, 16 /* *(d + 16) = t1 */
+ swi r10, r5, 20 /* *(d + 20) = t2 */
+ swi r11, r5, 24 /* *(d + 24) = t3 */
+ swi r12, r5, 28 /* *(d + 28) = t4 */
+ addi r6, r6, 32 /* s = s + 32 */
+ addi r4, r4, -32 /* n = n - 32 */
+ bneid r4, a_block_aligned /* while (n) loop */
+ addi r5, r5, 32 /* d = d + 32 (IN DELAY SLOT) */
+ bri a_block_done
+
+a_block_unaligned:
+ andi r8, r6, 0xfffffffc /* as = s & ~3 */
+ add r6, r6, r4 /* s = s + n */
+ lwi r11, r8, 0 /* h = *(as + 0) */
+
+ addi r9, r9, -1
+ beqi r9, a_block_u1 /* t1 was 1 => 1 byte offset */
+ addi r9, r9, -1
+ beqi r9, a_block_u2 /* t1 was 2 => 2 byte offset */
+
+a_block_u3:
+ bslli r11, r11, 24 /* h = h << 24 */
+a_bu3_loop:
+ lwi r12, r8, 4 /* v = *(as + 4) */
+ bsrli r9, r12, 8 /* t1 = v >> 8 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 0 /* *(d + 0) = t1 */
+ bslli r11, r12, 24 /* h = v << 24 */
+ lwi r12, r8, 8 /* v = *(as + 8) */
+ bsrli r9, r12, 8 /* t1 = v >> 8 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 4 /* *(d + 4) = t1 */
+ bslli r11, r12, 24 /* h = v << 24 */
+ lwi r12, r8, 12 /* v = *(as + 12) */
+ bsrli r9, r12, 8 /* t1 = v >> 8 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 8 /* *(d + 8) = t1 */
+ bslli r11, r12, 24 /* h = v << 24 */
+ lwi r12, r8, 16 /* v = *(as + 16) */
+ bsrli r9, r12, 8 /* t1 = v >> 8 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 12 /* *(d + 12) = t1 */
+ bslli r11, r12, 24 /* h = v << 24 */
+ lwi r12, r8, 20 /* v = *(as + 20) */
+ bsrli r9, r12, 8 /* t1 = v >> 8 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 16 /* *(d + 16) = t1 */
+ bslli r11, r12, 24 /* h = v << 24 */
+ lwi r12, r8, 24 /* v = *(as + 24) */
+ bsrli r9, r12, 8 /* t1 = v >> 8 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 20 /* *(d + 20) = t1 */
+ bslli r11, r12, 24 /* h = v << 24 */
+ lwi r12, r8, 28 /* v = *(as + 28) */
+ bsrli r9, r12, 8 /* t1 = v >> 8 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 24 /* *(d + 24) = t1 */
+ bslli r11, r12, 24 /* h = v << 24 */
+ lwi r12, r8, 32 /* v = *(as + 32) */
+ bsrli r9, r12, 8 /* t1 = v >> 8 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 28 /* *(d + 28) = t1 */
+ bslli r11, r12, 24 /* h = v << 24 */
+ addi r8, r8, 32 /* as = as + 32 */
+ addi r4, r4, -32 /* n = n - 32 */
+ bneid r4, a_bu3_loop /* while (n) loop */
+ addi r5, r5, 32 /* d = d + 32 (IN DELAY SLOT) */
+ bri a_block_done
+
+a_block_u1:
+ bslli r11, r11, 8 /* h = h << 8 */
+a_bu1_loop:
+ lwi r12, r8, 4 /* v = *(as + 4) */
+ bsrli r9, r12, 24 /* t1 = v >> 24 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 0 /* *(d + 0) = t1 */
+ bslli r11, r12, 8 /* h = v << 8 */
+ lwi r12, r8, 8 /* v = *(as + 8) */
+ bsrli r9, r12, 24 /* t1 = v >> 24 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 4 /* *(d + 4) = t1 */
+ bslli r11, r12, 8 /* h = v << 8 */
+ lwi r12, r8, 12 /* v = *(as + 12) */
+ bsrli r9, r12, 24 /* t1 = v >> 24 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 8 /* *(d + 8) = t1 */
+ bslli r11, r12, 8 /* h = v << 8 */
+ lwi r12, r8, 16 /* v = *(as + 16) */
+ bsrli r9, r12, 24 /* t1 = v >> 24 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 12 /* *(d + 12) = t1 */
+ bslli r11, r12, 8 /* h = v << 8 */
+ lwi r12, r8, 20 /* v = *(as + 20) */
+ bsrli r9, r12, 24 /* t1 = v >> 24 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 16 /* *(d + 16) = t1 */
+ bslli r11, r12, 8 /* h = v << 8 */
+ lwi r12, r8, 24 /* v = *(as + 24) */
+ bsrli r9, r12, 24 /* t1 = v >> 24 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 20 /* *(d + 20) = t1 */
+ bslli r11, r12, 8 /* h = v << 8 */
+ lwi r12, r8, 28 /* v = *(as + 28) */
+ bsrli r9, r12, 24 /* t1 = v >> 24 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 24 /* *(d + 24) = t1 */
+ bslli r11, r12, 8 /* h = v << 8 */
+ lwi r12, r8, 32 /* v = *(as + 32) */
+ bsrli r9, r12, 24 /* t1 = v >> 24 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 28 /* *(d + 28) = t1 */
+ bslli r11, r12, 8 /* h = v << 8 */
+ addi r8, r8, 32 /* as = as + 32 */
+ addi r4, r4, -32 /* n = n - 32 */
+ bneid r4, a_bu1_loop /* while (n) loop */
+ addi r5, r5, 32 /* d = d + 32 (IN DELAY SLOT) */
+ bri a_block_done
+
+a_block_u2:
+ bslli r11, r11, 16 /* h = h << 16 */
+a_bu2_loop:
+ lwi r12, r8, 4 /* v = *(as + 4) */
+ bsrli r9, r12, 16 /* t1 = v >> 16 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 0 /* *(d + 0) = t1 */
+ bslli r11, r12, 16 /* h = v << 16 */
+ lwi r12, r8, 8 /* v = *(as + 8) */
+ bsrli r9, r12, 16 /* t1 = v >> 16 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 4 /* *(d + 4) = t1 */
+ bslli r11, r12, 16 /* h = v << 16 */
+ lwi r12, r8, 12 /* v = *(as + 12) */
+ bsrli r9, r12, 16 /* t1 = v >> 16 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 8 /* *(d + 8) = t1 */
+ bslli r11, r12, 16 /* h = v << 16 */
+ lwi r12, r8, 16 /* v = *(as + 16) */
+ bsrli r9, r12, 16 /* t1 = v >> 16 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 12 /* *(d + 12) = t1 */
+ bslli r11, r12, 16 /* h = v << 16 */
+ lwi r12, r8, 20 /* v = *(as + 20) */
+ bsrli r9, r12, 16 /* t1 = v >> 16 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 16 /* *(d + 16) = t1 */
+ bslli r11, r12, 16 /* h = v << 16 */
+ lwi r12, r8, 24 /* v = *(as + 24) */
+ bsrli r9, r12, 16 /* t1 = v >> 16 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 20 /* *(d + 20) = t1 */
+ bslli r11, r12, 16 /* h = v << 16 */
+ lwi r12, r8, 28 /* v = *(as + 28) */
+ bsrli r9, r12, 16 /* t1 = v >> 16 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 24 /* *(d + 24) = t1 */
+ bslli r11, r12, 16 /* h = v << 16 */
+ lwi r12, r8, 32 /* v = *(as + 32) */
+ bsrli r9, r12, 16 /* t1 = v >> 16 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 28 /* *(d + 28) = t1 */
+ bslli r11, r12, 16 /* h = v << 16 */
+ addi r8, r8, 32 /* as = as + 32 */
+ addi r4, r4, -32 /* n = n - 32 */
+ bneid r4, a_bu2_loop /* while (n) loop */
+ addi r5, r5, 32 /* d = d + 32 (IN DELAY SLOT) */
+
+a_block_done:
+ addi r4, r0, 4 /* n = 4 */
+ cmpu r4, r4, r7 /* n = c - n (unsigned) */
+ blti r4, a_xfer_end /* if n < 0, less than one word to transfer */
+
+a_word_xfer:
+ andi r4, r7, 0xfffffffc /* n = c & ~3 */
+ addi r10, r0, 0 /* offset = 0 */
+
+ andi r9, r6, 3 /* t1 = s & 3 */
+ /* if temp != 0, unaligned transfers needed */
+ bnei r9, a_word_unaligned
+
+a_word_aligned:
+ lw r9, r6, r10 /* t1 = *(s+offset) */
+ sw r9, r5, r10 /* *(d+offset) = t1 */
+ addi r4, r4,-4 /* n-- */
+ bneid r4, a_word_aligned /* loop */
+ addi r10, r10, 4 /* offset++ (IN DELAY SLOT) */
+
+ bri a_word_done
+
+a_word_unaligned:
+ andi r8, r6, 0xfffffffc /* as = s & ~3 */
+ lwi r11, r8, 0 /* h = *(as + 0) */
+ addi r8, r8, 4 /* as = as + 4 */
+
+ addi r9, r9, -1
+ beqi r9, a_word_u1 /* t1 was 1 => 1 byte offset */
+ addi r9, r9, -1
+ beqi r9, a_word_u2 /* t1 was 2 => 2 byte offset */
+
+a_word_u3:
+ bslli r11, r11, 24 /* h = h << 24 */
+a_wu3_loop:
+ lw r12, r8, r10 /* v = *(as + offset) */
+ bsrli r9, r12, 8 /* t1 = v >> 8 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ sw r9, r5, r10 /* *(d + offset) = t1 */
+ bslli r11, r12, 24 /* h = v << 24 */
+ addi r4, r4,-4 /* n = n - 4 */
+ bneid r4, a_wu3_loop /* while (n) loop */
+ addi r10, r10, 4 /* offset = ofset + 4 (IN DELAY SLOT) */
+
+ bri a_word_done
+
+a_word_u1:
+ bslli r11, r11, 8 /* h = h << 8 */
+a_wu1_loop:
+ lw r12, r8, r10 /* v = *(as + offset) */
+ bsrli r9, r12, 24 /* t1 = v >> 24 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ sw r9, r5, r10 /* *(d + offset) = t1 */
+ bslli r11, r12, 8 /* h = v << 8 */
+ addi r4, r4,-4 /* n = n - 4 */
+ bneid r4, a_wu1_loop /* while (n) loop */
+ addi r10, r10, 4 /* offset = ofset + 4 (IN DELAY SLOT) */
+
+ bri a_word_done
+
+a_word_u2:
+ bslli r11, r11, 16 /* h = h << 16 */
+a_wu2_loop:
+ lw r12, r8, r10 /* v = *(as + offset) */
+ bsrli r9, r12, 16 /* t1 = v >> 16 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ sw r9, r5, r10 /* *(d + offset) = t1 */
+ bslli r11, r12, 16 /* h = v << 16 */
+ addi r4, r4,-4 /* n = n - 4 */
+ bneid r4, a_wu2_loop /* while (n) loop */
+ addi r10, r10, 4 /* offset = ofset + 4 (IN DELAY SLOT) */
+
+a_word_done:
+ add r5, r5, r10 /* d = d + offset */
+ add r6, r6, r10 /* s = s + offset */
+ rsub r7, r10, r7 /* c = c - offset */
+
+a_xfer_end:
+a_xfer_end_loop:
+ beqi r7, a_done /* while (c) */
+ lbui r9, r6, 0 /* t1 = *s */
+ addi r6, r6, 1 /* s++ */
+ sbi r9, r5, 0 /* *d = t1 */
+ addi r7, r7, -1 /* c-- */
+ brid a_xfer_end_loop /* loop */
+ addi r5, r5, 1 /* d++ (IN DELAY SLOT) */
+
+a_done:
+ rtsd r15, 8
+ nop
+
+.end memcpy
+/*----------------------------------------------------------------------------*/
+ .globl memmove
+ .ent memmove
+
+memmove:
+ cmpu r4, r5, r6 /* n = s - d */
+ bgei r4,fast_memcpy_ascending
+
+fast_memcpy_descending:
+ /* move d to return register as value of function */
+ addi r3, r5, 0
+
+ add r5, r5, r7 /* d = d + c */
+ add r6, r6, r7 /* s = s + c */
+
+ addi r4, r0, 4 /* n = 4 */
+ cmpu r4, r4, r7 /* n = c - n (unsigned) */
+ blti r4,d_xfer_end /* if n < 0, less than one word to transfer */
+
+ /* transfer first 0~3 bytes to get aligned dest address */
+ andi r4, r5, 3 /* n = d & 3 */
+ /* if zero, destination already aligned */
+ beqi r4,d_dalign_done
+ rsub r7, r4, r7 /* c = c - n adjust c */
+
+d_xfer_first_loop:
+ /* if no bytes left to transfer, transfer the bulk */
+ beqi r4,d_dalign_done
+ addi r6, r6, -1 /* s-- */
+ addi r5, r5, -1 /* d-- */
+ lbui r11, r6, 0 /* h = *s */
+ sbi r11, r5, 0 /* *d = h */
+ brid d_xfer_first_loop /* loop */
+ addi r4, r4, -1 /* n-- (IN DELAY SLOT) */
+
+d_dalign_done:
+ addi r4, r0, 32 /* n = 32 */
+ cmpu r4, r4, r7 /* n = c - n (unsigned) */
+ /* if n < 0, less than one block to transfer */
+ blti r4, d_block_done
+
+d_block_xfer:
+ andi r4, r7, 0xffffffe0 /* n = c & ~31 */
+ rsub r7, r4, r7 /* c = c - n */
+
+ andi r9, r6, 3 /* t1 = s & 3 */
+ /* if temp != 0, unaligned transfers needed */
+ bnei r9, d_block_unaligned
+
+d_block_aligned:
+ addi r6, r6, -32 /* s = s - 32 */
+ addi r5, r5, -32 /* d = d - 32 */
+ lwi r9, r6, 28 /* t1 = *(s + 28) */
+ lwi r10, r6, 24 /* t2 = *(s + 24) */
+ lwi r11, r6, 20 /* t3 = *(s + 20) */
+ lwi r12, r6, 16 /* t4 = *(s + 16) */
+ swi r9, r5, 28 /* *(d + 28) = t1 */
+ swi r10, r5, 24 /* *(d + 24) = t2 */
+ swi r11, r5, 20 /* *(d + 20) = t3 */
+ swi r12, r5, 16 /* *(d + 16) = t4 */
+ lwi r9, r6, 12 /* t1 = *(s + 12) */
+ lwi r10, r6, 8 /* t2 = *(s + 8) */
+ lwi r11, r6, 4 /* t3 = *(s + 4) */
+ lwi r12, r6, 0 /* t4 = *(s + 0) */
+ swi r9, r5, 12 /* *(d + 12) = t1 */
+ swi r10, r5, 8 /* *(d + 8) = t2 */
+ swi r11, r5, 4 /* *(d + 4) = t3 */
+ addi r4, r4, -32 /* n = n - 32 */
+ bneid r4, d_block_aligned /* while (n) loop */
+ swi r12, r5, 0 /* *(d + 0) = t4 (IN DELAY SLOT) */
+ bri d_block_done
+
+d_block_unaligned:
+ andi r8, r6, 0xfffffffc /* as = s & ~3 */
+ rsub r6, r4, r6 /* s = s - n */
+ lwi r11, r8, 0 /* h = *(as + 0) */
+
+ addi r9, r9, -1
+ beqi r9,d_block_u1 /* t1 was 1 => 1 byte offset */
+ addi r9, r9, -1
+ beqi r9,d_block_u2 /* t1 was 2 => 2 byte offset */
+
+d_block_u3:
+ bsrli r11, r11, 8 /* h = h >> 8 */
+d_bu3_loop:
+ addi r8, r8, -32 /* as = as - 32 */
+ addi r5, r5, -32 /* d = d - 32 */
+ lwi r12, r8, 28 /* v = *(as + 28) */
+ bslli r9, r12, 24 /* t1 = v << 24 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 28 /* *(d + 28) = t1 */
+ bsrli r11, r12, 8 /* h = v >> 8 */
+ lwi r12, r8, 24 /* v = *(as + 24) */
+ bslli r9, r12, 24 /* t1 = v << 24 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 24 /* *(d + 24) = t1 */
+ bsrli r11, r12, 8 /* h = v >> 8 */
+ lwi r12, r8, 20 /* v = *(as + 20) */
+ bslli r9, r12, 24 /* t1 = v << 24 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 20 /* *(d + 20) = t1 */
+ bsrli r11, r12, 8 /* h = v >> 8 */
+ lwi r12, r8, 16 /* v = *(as + 16) */
+ bslli r9, r12, 24 /* t1 = v << 24 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 16 /* *(d + 16) = t1 */
+ bsrli r11, r12, 8 /* h = v >> 8 */
+ lwi r12, r8, 12 /* v = *(as + 12) */
+ bslli r9, r12, 24 /* t1 = v << 24 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 12 /* *(d + 112) = t1 */
+ bsrli r11, r12, 8 /* h = v >> 8 */
+ lwi r12, r8, 8 /* v = *(as + 8) */
+ bslli r9, r12, 24 /* t1 = v << 24 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 8 /* *(d + 8) = t1 */
+ bsrli r11, r12, 8 /* h = v >> 8 */
+ lwi r12, r8, 4 /* v = *(as + 4) */
+ bslli r9, r12, 24 /* t1 = v << 24 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 4 /* *(d + 4) = t1 */
+ bsrli r11, r12, 8 /* h = v >> 8 */
+ lwi r12, r8, 0 /* v = *(as + 0) */
+ bslli r9, r12, 24 /* t1 = v << 24 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 0 /* *(d + 0) = t1 */
+ addi r4, r4, -32 /* n = n - 32 */
+ bneid r4, d_bu3_loop /* while (n) loop */
+ bsrli r11, r12, 8 /* h = v >> 8 (IN DELAY SLOT) */
+ bri d_block_done
+
+d_block_u1:
+ bsrli r11, r11, 24 /* h = h >> 24 */
+d_bu1_loop:
+ addi r8, r8, -32 /* as = as - 32 */
+ addi r5, r5, -32 /* d = d - 32 */
+ lwi r12, r8, 28 /* v = *(as + 28) */
+ bslli r9, r12, 8 /* t1 = v << 8 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 28 /* *(d + 28) = t1 */
+ bsrli r11, r12, 24 /* h = v >> 24 */
+ lwi r12, r8, 24 /* v = *(as + 24) */
+ bslli r9, r12, 8 /* t1 = v << 8 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 24 /* *(d + 24) = t1 */
+ bsrli r11, r12, 24 /* h = v >> 24 */
+ lwi r12, r8, 20 /* v = *(as + 20) */
+ bslli r9, r12, 8 /* t1 = v << 8 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 20 /* *(d + 20) = t1 */
+ bsrli r11, r12, 24 /* h = v >> 24 */
+ lwi r12, r8, 16 /* v = *(as + 16) */
+ bslli r9, r12, 8 /* t1 = v << 8 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 16 /* *(d + 16) = t1 */
+ bsrli r11, r12, 24 /* h = v >> 24 */
+ lwi r12, r8, 12 /* v = *(as + 12) */
+ bslli r9, r12, 8 /* t1 = v << 8 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 12 /* *(d + 112) = t1 */
+ bsrli r11, r12, 24 /* h = v >> 24 */
+ lwi r12, r8, 8 /* v = *(as + 8) */
+ bslli r9, r12, 8 /* t1 = v << 8 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 8 /* *(d + 8) = t1 */
+ bsrli r11, r12, 24 /* h = v >> 24 */
+ lwi r12, r8, 4 /* v = *(as + 4) */
+ bslli r9, r12, 8 /* t1 = v << 8 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 4 /* *(d + 4) = t1 */
+ bsrli r11, r12, 24 /* h = v >> 24 */
+ lwi r12, r8, 0 /* v = *(as + 0) */
+ bslli r9, r12, 8 /* t1 = v << 8 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 0 /* *(d + 0) = t1 */
+ addi r4, r4, -32 /* n = n - 32 */
+ bneid r4, d_bu1_loop /* while (n) loop */
+ bsrli r11, r12, 24 /* h = v >> 24 (IN DELAY SLOT) */
+ bri d_block_done
+
+d_block_u2:
+ bsrli r11, r11, 16 /* h = h >> 16 */
+d_bu2_loop:
+ addi r8, r8, -32 /* as = as - 32 */
+ addi r5, r5, -32 /* d = d - 32 */
+ lwi r12, r8, 28 /* v = *(as + 28) */
+ bslli r9, r12, 16 /* t1 = v << 16 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 28 /* *(d + 28) = t1 */
+ bsrli r11, r12, 16 /* h = v >> 16 */
+ lwi r12, r8, 24 /* v = *(as + 24) */
+ bslli r9, r12, 16 /* t1 = v << 16 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 24 /* *(d + 24) = t1 */
+ bsrli r11, r12, 16 /* h = v >> 16 */
+ lwi r12, r8, 20 /* v = *(as + 20) */
+ bslli r9, r12, 16 /* t1 = v << 16 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 20 /* *(d + 20) = t1 */
+ bsrli r11, r12, 16 /* h = v >> 16 */
+ lwi r12, r8, 16 /* v = *(as + 16) */
+ bslli r9, r12, 16 /* t1 = v << 16 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 16 /* *(d + 16) = t1 */
+ bsrli r11, r12, 16 /* h = v >> 16 */
+ lwi r12, r8, 12 /* v = *(as + 12) */
+ bslli r9, r12, 16 /* t1 = v << 16 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 12 /* *(d + 112) = t1 */
+ bsrli r11, r12, 16 /* h = v >> 16 */
+ lwi r12, r8, 8 /* v = *(as + 8) */
+ bslli r9, r12, 16 /* t1 = v << 16 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 8 /* *(d + 8) = t1 */
+ bsrli r11, r12, 16 /* h = v >> 16 */
+ lwi r12, r8, 4 /* v = *(as + 4) */
+ bslli r9, r12, 16 /* t1 = v << 16 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 4 /* *(d + 4) = t1 */
+ bsrli r11, r12, 16 /* h = v >> 16 */
+ lwi r12, r8, 0 /* v = *(as + 0) */
+ bslli r9, r12, 16 /* t1 = v << 16 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ swi r9, r5, 0 /* *(d + 0) = t1 */
+ addi r4, r4, -32 /* n = n - 32 */
+ bneid r4, d_bu2_loop /* while (n) loop */
+ bsrli r11, r12, 16 /* h = v >> 16 (IN DELAY SLOT) */
+
+d_block_done:
+ addi r4, r0, 4 /* n = 4 */
+ cmpu r4, r4, r7 /* n = c - n (unsigned) */
+ blti r4,d_xfer_end /* if n < 0, less than one word to transfer */
+
+d_word_xfer:
+ andi r4, r7, 0xfffffffc /* n = c & ~3 */
+ rsub r5, r4, r5 /* d = d - n */
+ rsub r6, r4, r6 /* s = s - n */
+ rsub r7, r4, r7 /* c = c - n */
+
+ andi r9, r6, 3 /* t1 = s & 3 */
+ /* if temp != 0, unaligned transfers needed */
+ bnei r9, d_word_unaligned
+
+d_word_aligned:
+ addi r4, r4,-4 /* n-- */
+ lw r9, r6, r4 /* t1 = *(s+n) */
+ bneid r4, d_word_aligned /* loop */
+ sw r9, r5, r4 /* *(d+n) = t1 (IN DELAY SLOT) */
+
+ bri d_word_done
+
+d_word_unaligned:
+ andi r8, r6, 0xfffffffc /* as = s & ~3 */
+ lw r11, r8, r4 /* h = *(as + n) */
+
+ addi r9, r9, -1
+ beqi r9,d_word_u1 /* t1 was 1 => 1 byte offset */
+ addi r9, r9, -1
+ beqi r9,d_word_u2 /* t1 was 2 => 2 byte offset */
+
+d_word_u3:
+ bsrli r11, r11, 8 /* h = h >> 8 */
+d_wu3_loop:
+ addi r4, r4,-4 /* n = n - 4 */
+ lw r12, r8, r4 /* v = *(as + n) */
+ bslli r9, r12, 24 /* t1 = v << 24 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ sw r9, r5, r4 /* *(d + n) = t1 */
+ bneid r4, d_wu3_loop /* while (n) loop */
+ bsrli r11, r12, 8 /* h = v >> 8 (IN DELAY SLOT) */
+
+ bri d_word_done
+
+d_word_u1:
+ bsrli r11, r11, 24 /* h = h >> 24 */
+d_wu1_loop:
+ addi r4, r4,-4 /* n = n - 4 */
+ lw r12, r8, r4 /* v = *(as + n) */
+ bslli r9, r12, 8 /* t1 = v << 8 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ sw r9, r5, r4 /* *(d + n) = t1 */
+ bneid r4, d_wu1_loop /* while (n) loop */
+ bsrli r11, r12, 24 /* h = v >> 24 (IN DELAY SLOT) */
+
+ bri d_word_done
+
+d_word_u2:
+ bsrli r11, r11, 16 /* h = h >> 16 */
+d_wu2_loop:
+ addi r4, r4,-4 /* n = n - 4 */
+ lw r12, r8, r4 /* v = *(as + n) */
+ bslli r9, r12, 16 /* t1 = v << 16 */
+ or r9, r11, r9 /* t1 = h | t1 */
+ sw r9, r5, r4 /* *(d + n) = t1 */
+ bneid r4, d_wu2_loop /* while (n) loop */
+ bsrli r11, r12, 16 /* h = v >> 16 (IN DELAY SLOT) */
+
+d_word_done:
+
+d_xfer_end:
+d_xfer_end_loop:
+ beqi r7, a_done /* while (c) */
+ addi r6, r6, -1 /* s-- */
+ lbui r9, r6, 0 /* t1 = *s */
+ addi r5, r5, -1 /* d-- */
+ sbi r9, r5, 0 /* *d = t1 */
+ brid d_xfer_end_loop /* loop */
+ addi r7, r7, -1 /* c-- (IN DELAY SLOT) */
+
+d_done:
+ rtsd r15, 8
+ nop
+
+.end memmove
diff --git a/arch/microblaze/lib/memcpy.c b/arch/microblaze/lib/memcpy.c
new file mode 100644
index 00000000000..5880119c448
--- /dev/null
+++ b/arch/microblaze/lib/memcpy.c
@@ -0,0 +1,161 @@
+/*
+ * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2008-2009 PetaLogix
+ * Copyright (C) 2007 John Williams
+ *
+ * Reasonably optimised generic C-code for memcpy on Microblaze
+ * This is generic C code to do efficient, alignment-aware memcpy.
+ *
+ * It is based on demo code originally Copyright 2001 by Intel Corp, taken from
+ * http://www.embedded.com/showArticle.jhtml?articleID=19205567
+ *
+ * Attempts were made, unsuccesfully, to contact the original
+ * author of this code (Michael Morrow, Intel). Below is the original
+ * copyright notice.
+ *
+ * This software has been developed by Intel Corporation.
+ * Intel specifically disclaims all warranties, express or
+ * implied, and all liability, including consequential and
+ * other indirect damages, for the use of this program, including
+ * liability for infringement of any proprietary rights,
+ * and including the warranties of merchantability and fitness
+ * for a particular purpose. Intel does not assume any
+ * responsibility for and errors which may appear in this program
+ * not any responsibility to update it.
+ */
+
+#include <linux/types.h>
+#include <linux/stddef.h>
+#include <linux/compiler.h>
+#include <linux/module.h>
+
+#include <linux/string.h>
+#include <asm/system.h>
+
+#ifdef __HAVE_ARCH_MEMCPY
+void *memcpy(void *v_dst, const void *v_src, __kernel_size_t c)
+{
+ const char *src = v_src;
+ char *dst = v_dst;
+#ifndef CONFIG_OPT_LIB_FUNCTION
+ /* Simple, byte oriented memcpy. */
+ while (c--)
+ *dst++ = *src++;
+
+ return v_dst;
+#else
+ /* The following code tries to optimize the copy by using unsigned
+ * alignment. This will work fine if both source and destination are
+ * aligned on the same boundary. However, if they are aligned on
+ * different boundaries shifts will be necessary. This might result in
+ * bad performance on MicroBlaze systems without a barrel shifter.
+ */
+ const uint32_t *i_src;
+ uint32_t *i_dst;
+
+ if (c >= 4) {
+ unsigned value, buf_hold;
+
+ /* Align the dstination to a word boundry. */
+ /* This is done in an endian independant manner. */
+ switch ((unsigned long)dst & 3) {
+ case 1:
+ *dst++ = *src++;
+ --c;
+ case 2:
+ *dst++ = *src++;
+ --c;
+ case 3:
+ *dst++ = *src++;
+ --c;
+ }
+
+ i_dst = (void *)dst;
+
+ /* Choose a copy scheme based on the source */
+ /* alignment relative to dstination. */
+ switch ((unsigned long)src & 3) {
+ case 0x0: /* Both byte offsets are aligned */
+ i_src = (const void *)src;
+
+ for (; c >= 4; c -= 4)
+ *i_dst++ = *i_src++;
+
+ src = (const void *)i_src;
+ break;
+ case 0x1: /* Unaligned - Off by 1 */
+ /* Word align the source */
+ i_src = (const void *) ((unsigned)src & ~3);
+
+ /* Load the holding buffer */
+ buf_hold = *i_src++ << 8;
+
+ for (; c >= 4; c -= 4) {
+ value = *i_src++;
+ *i_dst++ = buf_hold | value >> 24;
+ buf_hold = value << 8;
+ }
+
+ /* Realign the source */
+ src = (const void *)i_src;
+ src -= 3;
+ break;
+ case 0x2: /* Unaligned - Off by 2 */
+ /* Word align the source */
+ i_src = (const void *) ((unsigned)src & ~3);
+
+ /* Load the holding buffer */
+ buf_hold = *i_src++ << 16;
+
+ for (; c >= 4; c -= 4) {
+ value = *i_src++;
+ *i_dst++ = buf_hold | value >> 16;
+ buf_hold = value << 16;
+ }
+
+ /* Realign the source */
+ src = (const void *)i_src;
+ src -= 2;
+ break;
+ case 0x3: /* Unaligned - Off by 3 */
+ /* Word align the source */
+ i_src = (const void *) ((unsigned)src & ~3);
+
+ /* Load the holding buffer */
+ buf_hold = *i_src++ << 24;
+
+ for (; c >= 4; c -= 4) {
+ value = *i_src++;
+ *i_dst++ = buf_hold | value >> 8;
+ buf_hold = value << 24;
+ }
+
+ /* Realign the source */
+ src = (const void *)i_src;
+ src -= 1;
+ break;
+ }
+ dst = (void *)i_dst;
+ }
+
+ /* Finish off any remaining bytes */
+ /* simple fast copy, ... unless a cache boundry is crossed */
+ switch (c) {
+ case 3:
+ *dst++ = *src++;
+ case 2:
+ *dst++ = *src++;
+ case 1:
+ *dst++ = *src++;
+ }
+
+ return v_dst;
+#endif
+}
+EXPORT_SYMBOL(memcpy);
+#endif /* __HAVE_ARCH_MEMCPY */
+
+void *cacheable_memcpy(void *d, const void *s, __kernel_size_t c)
+{
+ return memcpy(d, s, c);
+}
diff --git a/arch/microblaze/lib/memmove.c b/arch/microblaze/lib/memmove.c
new file mode 100644
index 00000000000..d4e9f49a71f
--- /dev/null
+++ b/arch/microblaze/lib/memmove.c
@@ -0,0 +1,175 @@
+/*
+ * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2008-2009 PetaLogix
+ * Copyright (C) 2007 John Williams
+ *
+ * Reasonably optimised generic C-code for memcpy on Microblaze
+ * This is generic C code to do efficient, alignment-aware memmove.
+ *
+ * It is based on demo code originally Copyright 2001 by Intel Corp, taken from
+ * http://www.embedded.com/showArticle.jhtml?articleID=19205567
+ *
+ * Attempts were made, unsuccesfully, to contact the original
+ * author of this code (Michael Morrow, Intel). Below is the original
+ * copyright notice.
+ *
+ * This software has been developed by Intel Corporation.
+ * Intel specifically disclaims all warranties, express or
+ * implied, and all liability, including consequential and
+ * other indirect damages, for the use of this program, including
+ * liability for infringement of any proprietary rights,
+ * and including the warranties of merchantability and fitness
+ * for a particular purpose. Intel does not assume any
+ * responsibility for and errors which may appear in this program
+ * not any responsibility to update it.
+ */
+
+#include <linux/types.h>
+#include <linux/stddef.h>
+#include <linux/compiler.h>
+#include <linux/module.h>
+#include <linux/string.h>
+
+#ifdef __HAVE_ARCH_MEMMOVE
+void *memmove(void *v_dst, const void *v_src, __kernel_size_t c)
+{
+ const char *src = v_src;
+ char *dst = v_dst;
+
+#ifdef CONFIG_OPT_LIB_FUNCTION
+ const uint32_t *i_src;
+ uint32_t *i_dst;
+#endif
+
+ if (!c)
+ return v_dst;
+
+ /* Use memcpy when source is higher than dest */
+ if (v_dst <= v_src)
+ return memcpy(v_dst, v_src, c);
+
+#ifndef CONFIG_OPT_LIB_FUNCTION
+ /* copy backwards, from end to beginning */
+ src += c;
+ dst += c;
+
+ /* Simple, byte oriented memmove. */
+ while (c--)
+ *--dst = *--src;
+
+ return v_dst;
+#else
+ /* The following code tries to optimize the copy by using unsigned
+ * alignment. This will work fine if both source and destination are
+ * aligned on the same boundary. However, if they are aligned on
+ * different boundaries shifts will be necessary. This might result in
+ * bad performance on MicroBlaze systems without a barrel shifter.
+ */
+ /* FIXME this part needs more test */
+ /* Do a descending copy - this is a bit trickier! */
+ dst += c;
+ src += c;
+
+ if (c >= 4) {
+ unsigned value, buf_hold;
+
+ /* Align the destination to a word boundry. */
+ /* This is done in an endian independant manner. */
+
+ switch ((unsigned long)dst & 3) {
+ case 3:
+ *--dst = *--src;
+ --c;
+ case 2:
+ *--dst = *--src;
+ --c;
+ case 1:
+ *--dst = *--src;
+ --c;
+ }
+
+ i_dst = (void *)dst;
+ /* Choose a copy scheme based on the source */
+ /* alignment relative to dstination. */
+ switch ((unsigned long)src & 3) {
+ case 0x0: /* Both byte offsets are aligned */
+
+ i_src = (const void *)src;
+
+ for (; c >= 4; c -= 4)
+ *--i_dst = *--i_src;
+
+ src = (const void *)i_src;
+ break;
+ case 0x1: /* Unaligned - Off by 1 */
+ /* Word align the source */
+ i_src = (const void *) (((unsigned)src + 4) & ~3);
+
+ /* Load the holding buffer */
+ buf_hold = *--i_src >> 24;
+
+ for (; c >= 4; c -= 4) {
+ value = *--i_src;
+ *--i_dst = buf_hold << 8 | value;
+ buf_hold = value >> 24;
+ }
+
+ /* Realign the source */
+ src = (const void *)i_src;
+ src += 1;
+ break;
+ case 0x2: /* Unaligned - Off by 2 */
+ /* Word align the source */
+ i_src = (const void *) (((unsigned)src + 4) & ~3);
+
+ /* Load the holding buffer */
+ buf_hold = *--i_src >> 16;
+
+ for (; c >= 4; c -= 4) {
+ value = *--i_src;
+ *--i_dst = buf_hold << 16 | value;
+ buf_hold = value >> 16;
+ }
+
+ /* Realign the source */
+ src = (const void *)i_src;
+ src += 2;
+ break;
+ case 0x3: /* Unaligned - Off by 3 */
+ /* Word align the source */
+ i_src = (const void *) (((unsigned)src + 4) & ~3);
+
+ /* Load the holding buffer */
+ buf_hold = *--i_src >> 8;
+
+ for (; c >= 4; c -= 4) {
+ value = *--i_src;
+ *--i_dst = buf_hold << 24 | value;
+ buf_hold = value >> 8;
+ }
+
+ /* Realign the source */
+ src = (const void *)i_src;
+ src += 3;
+ break;
+ }
+ dst = (void *)i_dst;
+ }
+
+ /* simple fast copy, ... unless a cache boundry is crossed */
+ /* Finish off any remaining bytes */
+ switch (c) {
+ case 4:
+ *--dst = *--src;
+ case 3:
+ *--dst = *--src;
+ case 2:
+ *--dst = *--src;
+ case 1:
+ *--dst = *--src;
+ }
+ return v_dst;
+#endif
+}
+EXPORT_SYMBOL(memmove);
+#endif /* __HAVE_ARCH_MEMMOVE */
diff --git a/arch/microblaze/lib/memset.c b/arch/microblaze/lib/memset.c
new file mode 100644
index 00000000000..941dc8f94b0
--- /dev/null
+++ b/arch/microblaze/lib/memset.c
@@ -0,0 +1,82 @@
+/*
+ * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2008-2009 PetaLogix
+ * Copyright (C) 2007 John Williams
+ *
+ * Reasonably optimised generic C-code for memset on Microblaze
+ * This is generic C code to do efficient, alignment-aware memcpy.
+ *
+ * It is based on demo code originally Copyright 2001 by Intel Corp, taken from
+ * http://www.embedded.com/showArticle.jhtml?articleID=19205567
+ *
+ * Attempts were made, unsuccesfully, to contact the original
+ * author of this code (Michael Morrow, Intel). Below is the original
+ * copyright notice.
+ *
+ * This software has been developed by Intel Corporation.
+ * Intel specifically disclaims all warranties, express or
+ * implied, and all liability, including consequential and
+ * other indirect damages, for the use of this program, including
+ * liability for infringement of any proprietary rights,
+ * and including the warranties of merchantability and fitness
+ * for a particular purpose. Intel does not assume any
+ * responsibility for and errors which may appear in this program
+ * not any responsibility to update it.
+ */
+
+#include <linux/types.h>
+#include <linux/stddef.h>
+#include <linux/compiler.h>
+#include <linux/module.h>
+#include <linux/string.h>
+
+#ifdef __HAVE_ARCH_MEMSET
+void *memset(void *v_src, int c, __kernel_size_t n)
+{
+
+ char *src = v_src;
+#ifdef CONFIG_OPT_LIB_FUNCTION
+ uint32_t *i_src;
+ uint32_t w32;
+#endif
+ /* Truncate c to 8 bits */
+ c = (c & 0xFF);
+
+#ifdef CONFIG_OPT_LIB_FUNCTION
+ /* Make a repeating word out of it */
+ w32 = c;
+ w32 |= w32 << 8;
+ w32 |= w32 << 16;
+
+ if (n >= 4) {
+ /* Align the destination to a word boundary */
+ /* This is done in an endian independant manner */
+ switch ((unsigned) src & 3) {
+ case 1:
+ *src++ = c;
+ --n;
+ case 2:
+ *src++ = c;
+ --n;
+ case 3:
+ *src++ = c;
+ --n;
+ }
+
+ i_src = (void *)src;
+
+ /* Do as many full-word copies as we can */
+ for (; n >= 4; n -= 4)
+ *i_src++ = w32;
+
+ src = (void *)i_src;
+ }
+#endif
+ /* Simple, byte oriented memset or the rest of count. */
+ while (n--)
+ *src++ = c;
+
+ return v_src;
+}
+EXPORT_SYMBOL(memset);
+#endif /* __HAVE_ARCH_MEMSET */