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authorJulius Werner <jwerner@chromium.org>2013-12-13 12:59:57 -0800
committerIsaac Christensen <isaac.christensen@se-eng.com>2014-09-22 18:47:42 +0200
commitd65e214d666269d0bd20d88ba2bc83349810c668 (patch)
tree4c7db158bc03fddf7bc4b373ee382cd1a2635979 /src/arch/arm/asmlib.h
parent64b9ca9d4eb5eccdea86d967220c67b503a4519b (diff)
downloadcoreboot-d65e214d666269d0bd20d88ba2bc83349810c668.tar.xz
arm: Update mem* functions to newer versions
The memcpy/memset/memmove assembly implementations have been taken from U-Boot, which originally got them from Linux. I turns out that they are actually not that bad, but they could use an update. This patch pulls in the current Linux upstream versions of those files, removing some old U-Boot cruft such as checking whether the two pointers in a memcpy() are equal (really now?) or side-stepping the R8 register because it was used for special purposes. It also returns to the good old Linux ENTRY/ENDPROC macros since we have them now anyway, and straightens out the W() macro in preparation for unified thumb support. Change-Id: I138af269b423bef0a237759ac29f1ee58ca206a0 Signed-off-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/182179 Reviewed-by: Vincent Palatin <vpalatin@chromium.org> (cherry picked from commit 777127997bde5785b21d422d0b6eb04c4328b478) Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com> Reviewed-on: http://review.coreboot.org/6918 Tested-by: build bot (Jenkins) Reviewed-by: David Hendricks <dhendrix@chromium.org>
Diffstat (limited to 'src/arch/arm/asmlib.h')
-rw-r--r--src/arch/arm/asmlib.h72
1 files changed, 72 insertions, 0 deletions
diff --git a/src/arch/arm/asmlib.h b/src/arch/arm/asmlib.h
new file mode 100644
index 0000000000..cef0e7ea1a
--- /dev/null
+++ b/src/arch/arm/asmlib.h
@@ -0,0 +1,72 @@
+/*
+ * arch/arm/asmlib.h
+ *
+ * Adapted from Linux arch/arm/include/assembler.h
+ *
+ * Copyright (C) 1996-2000 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.
+ *
+ * This file contains arm architecture specific defines
+ * for the different processors.
+ *
+ * Do not include any C declarations in this file - it is included by
+ * assembler source.
+ */
+
+/*
+ * WARNING: This file is *only* meant for memcpy.S and friends which were copied
+ * from Linux and require some weird macros. It does unspeakable things like
+ * redefining "push", so do *not* try to turn it into a general assembly macro
+ * file, and keep it out of global include directories.
+ */
+
+#ifndef __ARM_ASMLIB_H__
+#define __ARM_ASMLIB_H__
+
+/*
+ * Endian independent macros for shifting bytes within registers.
+ */
+#ifndef __ARMEB__
+#define pull lsr
+#define push lsl
+#define get_byte_0 lsl #0
+#define get_byte_1 lsr #8
+#define get_byte_2 lsr #16
+#define get_byte_3 lsr #24
+#define put_byte_0 lsl #0
+#define put_byte_1 lsl #8
+#define put_byte_2 lsl #16
+#define put_byte_3 lsl #24
+#else
+#define pull lsl
+#define push lsr
+#define get_byte_0 lsr #24
+#define get_byte_1 lsr #16
+#define get_byte_2 lsr #8
+#define get_byte_3 lsl #0
+#define put_byte_0 lsl #24
+#define put_byte_1 lsl #16
+#define put_byte_2 lsl #8
+#define put_byte_3 lsl #0
+#endif
+
+/*
+ * Data preload for architectures that support it
+ */
+#if __COREBOOT_ARM_ARCH__ >= 5
+#define PLD(code...) code
+#else
+#define PLD(code...)
+#endif
+
+/*
+ * This can be used to enable code to cacheline align the destination
+ * pointer when bulk writing to memory. Linux doesn't enable this except
+ * for the "Feroceon" processor, so we better just leave it out.
+ */
+#define CALGN(code...)
+
+#endif /* __ARM_ASMLIB_H */