blackfin architecture

This adds support for the Analog Devices Blackfin processor architecture, and
currently supports the BF533, BF532, BF531, BF537, BF536, BF534, and BF561
(Dual Core) devices, with a variety of development platforms including those
avaliable from Analog Devices (BF533-EZKit, BF533-STAMP, BF537-STAMP,
BF561-EZKIT), and Bluetechnix!  Tinyboards.

The Blackfin architecture was jointly developed by Intel and Analog Devices
Inc.  (ADI) as the Micro Signal Architecture (MSA) core and introduced it in
December of 2000.  Since then ADI has put this core into its Blackfin
processor family of devices.  The Blackfin core has the advantages of a clean,
orthogonal,RISC-like microprocessor instruction set.  It combines a dual-MAC
(Multiply/Accumulate), state-of-the-art signal processing engine and
single-instruction, multiple-data (SIMD) multimedia capabilities into a single
instruction-set architecture.

The Blackfin architecture, including the instruction set, is described by the
ADSP-BF53x/BF56x Blackfin Processor Programming Reference
http://blackfin.uclinux.org/gf/download/frsrelease/29/2549/Blackfin_PRM.pdf

The Blackfin processor is already supported by major releases of gcc, and
there are binary and source rpms/tarballs for many architectures at:
http://blackfin.uclinux.org/gf/project/toolchain/frs There is complete
documentation, including "getting started" guides available at:
http://docs.blackfin.uclinux.org/ which provides links to the sources and
patches you will need in order to set up a cross-compiling environment for
bfin-linux-uclibc

This patch, as well as the other patches (toolchain, distribution,
uClibc) are actively supported by Analog Devices Inc, at:
http://blackfin.uclinux.org/

We have tested this on LTP, and our test plan (including pass/fails) can
be found at:
http://docs.blackfin.uclinux.org/doku.php?id=testing_the_linux_kernel

[m.kozlowski@tuxland.pl: balance parenthesis in blackfin header files]
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Signed-off-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl>
Signed-off-by: Aubrey Li <aubrey.li@analog.com>
Signed-off-by: Jie Zhang <jie.zhang@analog.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 48 insertions, 0 deletions

diff --git a/include/asm-blackfin/byteorder.h b/include/asm-blackfin/byteorder.h
new file mode 100644
index 000000000000..6a673d42da18
--- /dev/null
+++ b/include/asm-blackfin/byteorder.h
@@ -0,0 +1,48 @@
+#ifndef _BLACKFIN_BYTEORDER_H
+#define _BLACKFIN_BYTEORDER_H
+
+#include <asm/types.h>
+#include <linux/compiler.h>
+
+#ifdef __GNUC__
+
+static __inline__ __attribute_const__ __u32 ___arch__swahb32(__u32 xx)
+{
+        __u32 tmp;
+        __asm__("%1 = %0 >> 8 (V);\n\t"
+                "%0 = %0 << 8 (V);\n\t"
+                "%0 = %0 | %1;\n\t"
+                : "+d"(xx), "=&d"(tmp));
+        return xx;
+}
+
+static __inline__ __attribute_const__ __u32 ___arch__swahw32(__u32 xx)
+{
+        __u32 rv;
+        __asm__("%0 = PACK(%1.L, %1.H);\n\t": "=d"(rv): "d"(xx));
+        return rv;
+}
+
+#define __arch__swahb32(x) ___arch__swahb32(x)
+#define __arch__swahw32(x) ___arch__swahw32(x)
+#define __arch__swab32(x) ___arch__swahb32(___arch__swahw32(x))
+
+static __inline__ __attribute_const__ __u16 ___arch__swab16(__u16 xx)
+{
+        __u32 xw = xx;
+        __asm__("%0 <<= 8;\n    %0.L = %0.L + %0.H (NS);\n": "+d"(xw));
+        return (__u16)xw;
+}
+
+#define __arch__swab16(x) ___arch__swab16(x)
+
+#endif
+
+#if defined(__GNUC__) && !defined(__STRICT_ANSI__) || defined(__KERNEL__)
+#  define __BYTEORDER_HAS_U64__
+#  define __SWAB_64_THRU_32__
+#endif
+
+#include <linux/byteorder/little_endian.h>
+
+#endif                          /* _BLACKFIN_BYTEORDER_H */