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, 203 insertions, 0 deletions

diff --git a/include/asm-blackfin/cplbinit.h b/include/asm-blackfin/cplbinit.h
new file mode 100644
index 00000000000..3bad2d1e6a8
--- /dev/null
+++ b/include/asm-blackfin/cplbinit.h
@@ -0,0 +1,203 @@
+/*
+ * File:         include/asm-blackfin/cplbinit.h
+ * Based on:
+ * Author:
+ *
+ * Created:
+ * Description:
+ *
+ * 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
+ */
+
+#include <asm/blackfin.h>
+#include <asm/cplb.h>
+
+#define INITIAL_T 0x1
+#define SWITCH_T  0x2
+#define I_CPLB    0x4
+#define D_CPLB    0x8
+
+#define IN_KERNEL 1
+
+enum
+{ZERO_P, L1I_MEM, L1D_MEM, SDRAM_KERN , SDRAM_RAM_MTD, SDRAM_DMAZ, RES_MEM, ASYNC_MEM, L2_MEM};
+
+struct cplb_desc {
+        u32 start; /* start address */
+        u32 end; /* end address */
+        u32 psize; /* prefered size if any otherwise 1MB or 4MB*/
+        u16 attr;/* attributes */
+        u16 i_conf;/* I-CPLB DATA */
+        u16 d_conf;/* D-CPLB DATA */
+        u16 valid;/* valid */
+        const s8 name[30];/* name */
+};
+
+struct cplb_tab {
+  u_long *tab;
+        u16 pos;
+        u16 size;
+};
+
+u_long icplb_table[MAX_CPLBS+1];
+u_long dcplb_table[MAX_CPLBS+1];
+
+/* Till here we are discussing about the static memory management model.
+ * However, the operating envoronments commonly define more CPLB
+ * descriptors to cover the entire addressable memory than will fit into
+ * the available on-chip 16 CPLB MMRs. When this happens, the below table
+ * will be used which will hold all the potentially required CPLB descriptors
+ *
+ * This is how Page descriptor Table is implemented in uClinux/Blackfin.
+ */
+
+#ifdef CONFIG_CPLB_SWITCH_TAB_L1
+u_long ipdt_table[MAX_SWITCH_I_CPLBS+1]__attribute__((l1_data));
+u_long dpdt_table[MAX_SWITCH_D_CPLBS+1]__attribute__((l1_data));
+
+#ifdef CONFIG_CPLB_INFO
+u_long ipdt_swapcount_table[MAX_SWITCH_I_CPLBS]__attribute__((l1_data));
+u_long dpdt_swapcount_table[MAX_SWITCH_D_CPLBS]__attribute__((l1_data));
+#endif /* CONFIG_CPLB_INFO */
+
+#else
+
+u_long ipdt_table[MAX_SWITCH_I_CPLBS+1];
+u_long dpdt_table[MAX_SWITCH_D_CPLBS+1];
+
+#ifdef CONFIG_CPLB_INFO
+u_long ipdt_swapcount_table[MAX_SWITCH_I_CPLBS];
+u_long dpdt_swapcount_table[MAX_SWITCH_D_CPLBS];
+#endif /* CONFIG_CPLB_INFO */
+
+#endif /*CONFIG_CPLB_SWITCH_TAB_L1*/
+
+struct s_cplb {
+        struct cplb_tab init_i;
+        struct cplb_tab init_d;
+        struct cplb_tab switch_i;
+        struct cplb_tab switch_d;
+};
+
+#if defined(CONFIG_BLKFIN_DCACHE) || defined(CONFIG_BLKFIN_CACHE)
+static struct cplb_desc cplb_data[] = {
+        {
+                .start = 0,
+                .end = SIZE_4K,
+                .psize = SIZE_4K,
+                .attr = INITIAL_T | SWITCH_T | I_CPLB | D_CPLB,
+                .i_conf = SDRAM_OOPS,
+                .d_conf = SDRAM_OOPS,
+#if defined(CONFIG_DEBUG_HUNT_FOR_ZERO)
+                .valid = 1,
+#else
+                .valid = 0,
+#endif
+                .name = "ZERO Pointer Saveguard",
+        },
+        {
+                .start = L1_CODE_START,
+                .end = L1_CODE_START + L1_CODE_LENGTH,
+                .psize = SIZE_4M,
+                .attr = INITIAL_T | SWITCH_T | I_CPLB,
+                .i_conf = L1_IMEMORY,
+                .d_conf = 0,
+                .valid = 1,
+                .name = "L1 I-Memory",
+        },
+        {
+                .start = L1_DATA_A_START,
+                .end = L1_DATA_B_START + L1_DATA_B_LENGTH,
+                .psize = SIZE_4M,
+                .attr = INITIAL_T | SWITCH_T | D_CPLB,
+                .i_conf = 0,
+                .d_conf = L1_DMEMORY,
+#if ((L1_DATA_A_LENGTH > 0) || (L1_DATA_B_LENGTH > 0))
+                .valid = 1,
+#else
+                .valid = 0,
+#endif
+                .name = "L1 D-Memory",
+        },
+        {
+                .start = 0,
+                .end = 0,  /* dynamic */
+                .psize = 0,
+                .attr = INITIAL_T | SWITCH_T | I_CPLB | D_CPLB,
+                .i_conf =  SDRAM_IGENERIC,
+                .d_conf =  SDRAM_DGENERIC,
+                .valid = 1,
+                .name = "SDRAM Kernel",
+        },
+        {
+                .start = 0, /* dynamic */
+                .end = 0, /* dynamic */
+                .psize = 0,
+                .attr = INITIAL_T | SWITCH_T | D_CPLB,
+                .i_conf =  SDRAM_IGENERIC,
+                .d_conf =  SDRAM_DNON_CHBL,
+                .valid = 1,
+                .name = "SDRAM RAM MTD",
+        },
+        {
+                .start = 0, /* dynamic */
+                .end = 0,   /* dynamic */
+                .psize = SIZE_1M,
+                .attr = INITIAL_T | SWITCH_T | D_CPLB,
+                .d_conf = SDRAM_DNON_CHBL,
+                .valid = 1,//(DMA_UNCACHED_REGION > 0),
+                .name = "SDRAM Uncached DMA ZONE",
+        },
+        {
+                .start = 0, /* dynamic */
+                .end = 0, /* dynamic */
+                .psize = 0,
+                .attr = SWITCH_T | D_CPLB,
+                .i_conf = 0, /* dynamic */
+                .d_conf = 0, /* dynamic */
+                .valid = 1,
+                .name = "SDRAM Reserved Memory",
+        },
+        {
+                .start = ASYNC_BANK0_BASE,
+                .end = ASYNC_BANK3_BASE + ASYNC_BANK3_SIZE,
+                .psize = 0,
+                .attr = SWITCH_T | D_CPLB,
+                .d_conf = SDRAM_EBIU,
+                .valid = 1,
+                .name = "ASYNC Memory",
+        },
+        {
+#if defined(CONFIG_BF561)
+                .start = L2_SRAM,
+                .end = L2_SRAM_END,
+                .psize = SIZE_1M,
+                .attr = SWITCH_T | D_CPLB,
+                .i_conf = L2_MEMORY,
+                .d_conf = L2_MEMORY,
+                .valid = 1,
+#else
+                .valid = 0,
+#endif
+                .name = "L2 Memory",
+        }
+};
+#endif