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, 120 insertions, 0 deletions

diff --git a/include/asm-blackfin/bfin-global.h b/include/asm-blackfin/bfin-global.h
new file mode 100644
index 000000000000..e37f81609fc3
--- /dev/null
+++ b/include/asm-blackfin/bfin-global.h
@@ -0,0 +1,120 @@
+/*
+ * File:         include/asm-blackfin/bfin-global.h
+ * Based on:
+ * Author: *
+ * Created:
+ * Description:  Global extern defines for blackfin
+ *
+ * Modified:
+ *               Copyright 2004-2006 Analog Devices Inc.
+ *
+ * Bugs:         Enter bugs at http://blackfin.uclinux.org/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see the file COPYING, or write
+ * to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifndef _BFIN_GLOBAL_H_
+#define _BFIN_GLOBAL_H_
+
+#ifndef __ASSEMBLY__
+
+#include <asm-generic/sections.h>
+#include <asm/ptrace.h>
+#include <asm/user.h>
+#include <linux/linkage.h>
+#include <linux/types.h>
+
+#if defined(CONFIG_DMA_UNCACHED_2M)
+# define DMA_UNCACHED_REGION (2 * 1024 * 1024)
+#elif defined(CONFIG_DMA_UNCACHED_1M)
+# define DMA_UNCACHED_REGION (1024 * 1024)
+#else
+# define DMA_UNCACHED_REGION (0)
+#endif
+
+extern unsigned long get_cclk(void);
+extern unsigned long get_sclk(void);
+
+extern void dump_thread(struct pt_regs *regs, struct user *dump);
+extern void dump_bfin_regs(struct pt_regs *fp, void *retaddr);
+extern void dump_bfin_trace_buffer(void);
+
+extern int init_arch_irq(void);
+extern void bfin_reset(void);
+extern void _cplb_hdr(void);
+/* Blackfin cache functions */
+extern void bfin_icache_init(void);
+extern void bfin_dcache_init(void);
+extern int read_iloc(void);
+extern int bfin_console_init(void);
+extern asmlinkage void lower_to_irq14(void);
+extern void init_dma(void);
+extern void program_IAR(void);
+extern void evt14_softirq(void);
+extern asmlinkage void asm_do_IRQ(unsigned int irq, struct pt_regs *regs);
+extern void bfin_gpio_interrupt_setup(int irq, int irq_pfx, int type);
+
+extern void *l1_data_A_sram_alloc(size_t);
+extern void *l1_data_B_sram_alloc(size_t);
+extern void *l1_inst_sram_alloc(size_t);
+extern void *l1_data_sram_alloc(size_t);
+extern void *l1_data_sram_zalloc(size_t);
+extern int l1_data_A_sram_free(const void*);
+extern int l1_data_B_sram_free(const void*);
+extern int l1_inst_sram_free(const void*);
+extern int l1_data_sram_free(const void*);
+extern int sram_free(const void*);
+
+#define L1_INST_SRAM		0x00000001
+#define L1_DATA_A_SRAM		0x00000002
+#define L1_DATA_B_SRAM		0x00000004
+#define L1_DATA_SRAM		0x00000006
+extern void *sram_alloc_with_lsl(size_t, unsigned long);
+extern int sram_free_with_lsl(const void*);
+
+extern void led_on(int);
+extern void led_off(int);
+extern void led_toggle(int);
+extern void led_disp_num(int);
+extern void led_toggle_num(int);
+extern void init_leds(void);
+
+extern char *bfin_board_name __attribute__ ((weak));
+extern unsigned long wall_jiffies;
+extern unsigned long ipdt_table[];
+extern unsigned long dpdt_table[];
+extern unsigned long icplb_table[];
+extern unsigned long dcplb_table[];
+
+extern unsigned long ipdt_swapcount_table[];
+extern unsigned long dpdt_swapcount_table[];
+
+extern unsigned long table_start, table_end;
+
+extern struct file_operations dpmc_fops;
+extern char _start;
+extern unsigned long _ramstart, _ramend, _rambase;
+extern unsigned long memory_start, memory_end, physical_mem_end;
+extern char _stext_l1[], _etext_l1[], _sdata_l1[], _edata_l1[], _sbss_l1[],
+    _ebss_l1[], _l1_lma_start[], _sdata_b_l1[], _ebss_b_l1[];
+
+#ifdef CONFIG_MTD_UCLINUX
+extern unsigned long memory_mtd_start, memory_mtd_end, mtd_size;
+#endif
+
+#endif
+
+#endif				/* _BLACKFIN_H_ */