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author | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
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committer | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
commit | 871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch) | |
tree | 8718f573808810c2a1e8cb8fb6ac469093ca2784 /arch/x86/boot/copy.S | |
parent | 9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff) | |
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.
Diffstat (limited to 'arch/x86/boot/copy.S')
-rw-r--r-- | arch/x86/boot/copy.S | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/arch/x86/boot/copy.S b/arch/x86/boot/copy.S new file mode 100644 index 00000000..11f272c6 --- /dev/null +++ b/arch/x86/boot/copy.S @@ -0,0 +1,87 @@ +/* ----------------------------------------------------------------------- * + * + * Copyright (C) 1991, 1992 Linus Torvalds + * Copyright 2007 rPath, Inc. - All Rights Reserved + * + * This file is part of the Linux kernel, and is made available under + * the terms of the GNU General Public License version 2. + * + * ----------------------------------------------------------------------- */ + +#include <linux/linkage.h> + +/* + * Memory copy routines + */ + + .code16gcc + .text + +GLOBAL(memcpy) + pushw %si + pushw %di + movw %ax, %di + movw %dx, %si + pushw %cx + shrw $2, %cx + rep; movsl + popw %cx + andw $3, %cx + rep; movsb + popw %di + popw %si + ret +ENDPROC(memcpy) + +GLOBAL(memset) + pushw %di + movw %ax, %di + movzbl %dl, %eax + imull $0x01010101,%eax + pushw %cx + shrw $2, %cx + rep; stosl + popw %cx + andw $3, %cx + rep; stosb + popw %di + ret +ENDPROC(memset) + +GLOBAL(copy_from_fs) + pushw %ds + pushw %fs + popw %ds + call memcpy + popw %ds + ret +ENDPROC(copy_from_fs) + +GLOBAL(copy_to_fs) + pushw %es + pushw %fs + popw %es + call memcpy + popw %es + ret +ENDPROC(copy_to_fs) + +#if 0 /* Not currently used, but can be enabled as needed */ +GLOBAL(copy_from_gs) + pushw %ds + pushw %gs + popw %ds + call memcpy + popw %ds + ret +ENDPROC(copy_from_gs) + +GLOBAL(copy_to_gs) + pushw %es + pushw %gs + popw %es + call memcpy + popw %es + ret +ENDPROC(copy_to_gs) +#endif |