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>
diff --git a/include/asm-blackfin/flat.h b/include/asm-blackfin/flat.h
new file mode 100644
index 0000000..e70074e
--- /dev/null
+++ b/include/asm-blackfin/flat.h
@@ -0,0 +1,58 @@
+/*
+ * include/asm-blackfin/flat.h -- uClinux flat-format executables
+ *
+ * Copyright (C) 2003,
+ *
+ */
+
+#ifndef __BLACKFIN_FLAT_H__
+#define __BLACKFIN_FLAT_H__
+
+#include <asm/unaligned.h>
+
+#define flat_stack_align(sp) /* nothing needed */
+#define flat_argvp_envp_on_stack() 0
+#define flat_old_ram_flag(flags) (flags)
+
+extern unsigned long bfin_get_addr_from_rp (unsigned long *ptr,
+ unsigned long relval,
+ unsigned long flags,
+ unsigned long *persistent);
+
+extern void bfin_put_addr_at_rp(unsigned long *ptr, unsigned long addr,
+ unsigned long relval);
+
+/* The amount by which a relocation can exceed the program image limits
+ without being regarded as an error. */
+
+#define flat_reloc_valid(reloc, size) ((reloc) <= (size))
+
+#define flat_get_addr_from_rp(rp, relval, flags, persistent) \
+ bfin_get_addr_from_rp(rp, relval, flags, persistent)
+#define flat_put_addr_at_rp(rp, val, relval) \
+ bfin_put_addr_at_rp(rp, val, relval)
+
+/* Convert a relocation entry into an address. */
+static inline unsigned long
+flat_get_relocate_addr (unsigned long relval)
+{
+ return relval & 0x03ffffff; /* Mask out top 6 bits */
+}
+
+static inline int flat_set_persistent(unsigned long relval,
+ unsigned long *persistent)
+{
+ int type = (relval >> 26) & 7;
+ if (type == 3) {
+ *persistent = relval << 16;
+ return 1;
+ }
+ return 0;
+}
+
+static inline int flat_addr_absolute(unsigned long relval)
+{
+ return (relval & (1 << 29)) != 0;
+}
+
+#endif /* __BLACKFIN_FLAT_H__ */