From 820e8feca06ff744f60e5036c3178dde40b91afc Mon Sep 17 00:00:00 2001 From: Vivek Goyal Date: Tue, 18 Mar 2014 15:26:38 -0400 Subject: [PATCH] x86, boot: Move optimized memcpy() 32/64 bit versions to compressed/string.c Move optimized versions of memcpy to compressed/string.c This will allow any other code to use these functions too if need be in future. Again trying to put definition in a common place instead of hiding it in misc.c Signed-off-by: Vivek Goyal Link: http://lkml.kernel.org/r/1395170800-11059-4-git-send-email-vgoyal@redhat.com Signed-off-by: H. Peter Anvin --- arch/x86/boot/compressed/misc.c | 31 +------------------------------ arch/x86/boot/compressed/string.c | 33 +++++++++++++++++++++++++++++++++ 2 files changed, 34 insertions(+), 30 deletions(-) diff --git a/arch/x86/boot/compressed/misc.c b/arch/x86/boot/compressed/misc.c index 196eaf373a06..3100092b1346 100644 --- a/arch/x86/boot/compressed/misc.c +++ b/arch/x86/boot/compressed/misc.c @@ -10,6 +10,7 @@ */ #include "misc.h" +#include "../string.h" /* WARNING!! * This code is compiled with -fPIC and it is relocated dynamically @@ -110,7 +111,6 @@ static void error(char *m); struct boot_params *real_mode; /* Pointer to real-mode data */ void *memset(void *s, int c, size_t n); -void *memcpy(void *dest, const void *src, size_t n); memptr free_mem_ptr; memptr free_mem_end_ptr; @@ -225,35 +225,6 @@ void *memset(void *s, int c, size_t n) ss[i] = c; return s; } -#ifdef CONFIG_X86_32 -void *memcpy(void *dest, const void *src, size_t n) -{ - int d0, d1, d2; - asm volatile( - "rep ; movsl\n\t" - "movl %4,%%ecx\n\t" - "rep ; movsb\n\t" - : "=&c" (d0), "=&D" (d1), "=&S" (d2) - : "0" (n >> 2), "g" (n & 3), "1" (dest), "2" (src) - : "memory"); - - return dest; -} -#else -void *memcpy(void *dest, const void *src, size_t n) -{ - long d0, d1, d2; - asm volatile( - "rep ; movsq\n\t" - "movq %4,%%rcx\n\t" - "rep ; movsb\n\t" - : "=&c" (d0), "=&D" (d1), "=&S" (d2) - : "0" (n >> 3), "g" (n & 7), "1" (dest), "2" (src) - : "memory"); - - return dest; -} -#endif static void error(char *x) { diff --git a/arch/x86/boot/compressed/string.c b/arch/x86/boot/compressed/string.c index 212004ec787d..3b5a82fc6ad7 100644 --- a/arch/x86/boot/compressed/string.c +++ b/arch/x86/boot/compressed/string.c @@ -11,3 +11,36 @@ int memcmp(const void *s1, const void *s2, size_t len) } #include "../string.c" + +/* misc.h might pull in string_32.h which has a macro for memcpy. undef that */ +#undef memcpy + +#ifdef CONFIG_X86_32 +void *memcpy(void *dest, const void *src, size_t n) +{ + int d0, d1, d2; + asm volatile( + "rep ; movsl\n\t" + "movl %4,%%ecx\n\t" + "rep ; movsb\n\t" + : "=&c" (d0), "=&D" (d1), "=&S" (d2) + : "0" (n >> 2), "g" (n & 3), "1" (dest), "2" (src) + : "memory"); + + return dest; +} +#else +void *memcpy(void *dest, const void *src, size_t n) +{ + long d0, d1, d2; + asm volatile( + "rep ; movsq\n\t" + "movq %4,%%rcx\n\t" + "rep ; movsb\n\t" + : "=&c" (d0), "=&D" (d1), "=&S" (d2) + : "0" (n >> 3), "g" (n & 7), "1" (dest), "2" (src) + : "memory"); + + return dest; +} +#endif -- 2.11.0