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, 287 insertions, 0 deletions

diff --git a/include/asm-blackfin/mach-bf537/bf537.h b/include/asm-blackfin/mach-bf537/bf537.h
new file mode 100644
index 000000000000..b8924cd7730c
--- /dev/null
+++ b/include/asm-blackfin/mach-bf537/bf537.h
@@ -0,0 +1,287 @@
+/*
+ * File:         include/asm-blackfin/mach-bf537/bf537.h
+ * Based on:
+ * Author:
+ *
+ * Created:
+ * Description:  SYSTEM MMR REGISTER AND MEMORY MAP FOR ADSP-BF537
+ *
+ * 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 __MACH_BF537_H__
+#define __MACH_BF537_H__
+
+#define SUPPORTED_REVID 2
+
+/* Masks for generic ERROR IRQ demultiplexing used in int-priority-sc.c */
+
+#define SPI_ERR_MASK (TXCOL | RBSY | MODF | TXE)	/* SPI_STAT */
+#define SPORT_ERR_MASK (ROVF | RUVF | TOVF | TUVF)	/* SPORTx_STAT */
+#define PPI_ERR_MASK (0xFFFF & ~FLD)	/* PPI_STATUS */
+#define EMAC_ERR_MASK (PHYINT | MMCINT | RXFSINT | TXFSINT | WAKEDET | RXDMAERR | TXDMAERR | STMDONE)	/* EMAC_SYSTAT */
+#define UART_ERR_MASK_STAT1 (0x4)	/* UARTx_IIR */
+#define UART_ERR_MASK_STAT0 (0x2)	/* UARTx_IIR */
+#define CAN_ERR_MASK  (EWTIF | EWRIF | EPIF | BOIF | WUIF | UIAIF | AAIF | RMLIF | UCEIF | EXTIF | ADIF)	/* CAN_GIF */
+
+#define OFFSET_(x) ((x) & 0x0000FFFF)
+
+/*some misc defines*/
+#define IMASK_IVG15		0x8000
+#define IMASK_IVG14		0x4000
+#define IMASK_IVG13		0x2000
+#define IMASK_IVG12		0x1000
+
+#define IMASK_IVG11		0x0800
+#define IMASK_IVG10		0x0400
+#define IMASK_IVG9		0x0200
+#define IMASK_IVG8		0x0100
+
+#define IMASK_IVG7		0x0080
+#define IMASK_IVGTMR	0x0040
+#define IMASK_IVGHW		0x0020
+
+/***************************/
+
+
+#define BLKFIN_DSUBBANKS	4
+#define BLKFIN_DWAYS		2
+#define BLKFIN_DLINES		64
+#define BLKFIN_ISUBBANKS	4
+#define BLKFIN_IWAYS		4
+#define BLKFIN_ILINES		32
+
+#define WAY0_L			0x1
+#define WAY1_L			0x2
+#define WAY01_L			0x3
+#define WAY2_L			0x4
+#define WAY02_L			0x5
+#define	WAY12_L			0x6
+#define	WAY012_L		0x7
+
+#define	WAY3_L			0x8
+#define	WAY03_L			0x9
+#define	WAY13_L			0xA
+#define	WAY013_L		0xB
+
+#define	WAY32_L			0xC
+#define	WAY320_L		0xD
+#define	WAY321_L		0xE
+#define	WAYALL_L		0xF
+
+#define DMC_ENABLE (2<<2)	/*yes, 2, not 1 */
+
+/********************************* EBIU Settings ************************************/
+#define AMBCTL0VAL	((CONFIG_BANK_1 << 16) | CONFIG_BANK_0)
+#define AMBCTL1VAL	((CONFIG_BANK_3 << 16) | CONFIG_BANK_2)
+
+#ifdef CONFIG_C_AMBEN_ALL
+#define V_AMBEN AMBEN_ALL
+#endif
+#ifdef CONFIG_C_AMBEN
+#define V_AMBEN 0x0
+#endif
+#ifdef CONFIG_C_AMBEN_B0
+#define V_AMBEN AMBEN_B0
+#endif
+#ifdef CONFIG_C_AMBEN_B0_B1
+#define V_AMBEN AMBEN_B0_B1
+#endif
+#ifdef CONFIG_C_AMBEN_B0_B1_B2
+#define V_AMBEN AMBEN_B0_B1_B2
+#endif
+#ifdef CONFIG_C_AMCKEN
+#define V_AMCKEN AMCKEN
+#else
+#define V_AMCKEN 0x0
+#endif
+#ifdef CONFIG_C_CDPRIO
+#define V_CDPRIO 0x100
+#else
+#define V_CDPRIO 0x0
+#endif
+
+#define AMGCTLVAL	(V_AMBEN | V_AMCKEN | V_CDPRIO)
+
+#define MAX_VC	650000000
+#define MIN_VC	50000000
+
+/********************************PLL Settings **************************************/
+#ifdef CONFIG_BFIN_KERNEL_CLOCK
+#if (CONFIG_VCO_MULT < 0)
+#error "VCO Multiplier is less than 0. Please select a different value"
+#endif
+
+#if (CONFIG_VCO_MULT == 0)
+#error "VCO Multiplier should be greater than 0. Please select a different value"
+#endif
+
+#if (CONFIG_VCO_MULT > 64)
+#error "VCO Multiplier is more than 64. Please select a different value"
+#endif
+
+#ifndef CONFIG_CLKIN_HALF
+#define CONFIG_VCO_HZ	(CONFIG_CLKIN_HZ * CONFIG_VCO_MULT)
+#else
+#define CONFIG_VCO_HZ	((CONFIG_CLKIN_HZ * CONFIG_VCO_MULT)/2)
+#endif
+
+#ifndef CONFIG_PLL_BYPASS
+#define CONFIG_CCLK_HZ	(CONFIG_VCO_HZ/CONFIG_CCLK_DIV)
+#define CONFIG_SCLK_HZ	(CONFIG_VCO_HZ/CONFIG_SCLK_DIV)
+#else
+#define CONFIG_CCLK_HZ	CONFIG_CLKIN_HZ
+#define CONFIG_SCLK_HZ	CONFIG_CLKIN_HZ
+#endif
+
+#if (CONFIG_SCLK_DIV < 1)
+#error "SCLK DIV cannot be less than 1 or more than 15. Please select a proper value"
+#endif
+
+#if (CONFIG_SCLK_DIV > 15)
+#error "SCLK DIV cannot be less than 1 or more than 15. Please select a proper value"
+#endif
+
+#if (CONFIG_CCLK_DIV != 1)
+#if (CONFIG_CCLK_DIV != 2)
+#if (CONFIG_CCLK_DIV != 4)
+#if (CONFIG_CCLK_DIV != 8)
+#error "CCLK DIV can be 1,2,4 or 8 only. Please select a proper value"
+#endif
+#endif
+#endif
+#endif
+
+#if (CONFIG_VCO_HZ > MAX_VC)
+#error "VCO selected is more than maximum value. Please change the VCO multipler"
+#endif
+
+#if (CONFIG_SCLK_HZ > 133000000)
+#error "Sclk value selected is more than maximum. Please select a proper value for SCLK multiplier"
+#endif
+
+#if (CONFIG_SCLK_HZ < 27000000)
+#error "Sclk value selected is less than minimum. Please select a proper value for SCLK multiplier"
+#endif
+
+#if (CONFIG_SCLK_HZ >= CONFIG_CCLK_HZ)
+#if (CONFIG_SCLK_HZ != CONFIG_CLKIN_HZ)
+#if (CONFIG_CCLK_HZ != CONFIG_CLKIN_HZ)
+#error "Please select sclk less than cclk"
+#endif
+#endif
+#endif
+
+#if (CONFIG_CCLK_DIV == 1)
+#define CONFIG_CCLK_ACT_DIV   CCLK_DIV1
+#endif
+#if (CONFIG_CCLK_DIV == 2)
+#define CONFIG_CCLK_ACT_DIV   CCLK_DIV2
+#endif
+#if (CONFIG_CCLK_DIV == 4)
+#define CONFIG_CCLK_ACT_DIV   CCLK_DIV4
+#endif
+#if (CONFIG_CCLK_DIV == 8)
+#define CONFIG_CCLK_ACT_DIV   CCLK_DIV8
+#endif
+#ifndef CONFIG_CCLK_ACT_DIV
+#define CONFIG_CCLK_ACT_DIV   CONFIG_CCLK_DIV_not_defined_properly
+#endif
+
+#if defined(ANOMALY_05000273) && (CONFIG_CCLK_DIV == 1)
+#error ANOMALY 05000273, please make sure CCLK is at least 2x SCLK
+#endif
+
+#endif				/* CONFIG_BFIN_KERNEL_CLOCK */
+
+#ifdef CONFIG_BF537
+#define CPU "BF537"
+#define CPUID 0x027c8000
+#endif
+#ifdef CONFIG_BF536
+#define CPU "BF536"
+#define CPUID 0x027c8000
+#endif
+#ifdef CONFIG_BF534
+#define CPU "BF534"
+#define CPUID 0x027c6000
+#endif
+#ifndef CPU
+#define	CPU "UNKNOWN"
+#define CPUID 0x0
+#endif
+
+#if (CONFIG_MEM_SIZE % 4)
+#error "SDRAM mem size must be multible of 4MB"
+#endif
+
+#define SDRAM_IGENERIC    (CPLB_L1_CHBL | CPLB_USER_RD | CPLB_VALID | CPLB_PORTPRIO)
+#define SDRAM_IKERNEL     (SDRAM_IGENERIC | CPLB_LOCK)
+#define L1_IMEMORY        (               CPLB_USER_RD | CPLB_VALID | CPLB_LOCK)
+#define SDRAM_INON_CHBL   (               CPLB_USER_RD | CPLB_VALID)
+
+/*Use the menuconfig cache policy here - CONFIG_BLKFIN_WT/CONFIG_BLKFIN_WB*/
+
+#define ANOMALY_05000158_WORKAROUND		0x200
+#ifdef CONFIG_BLKFIN_WB		/*Write Back Policy */
+#define SDRAM_DGENERIC   (CPLB_L1_CHBL | CPLB_DIRTY \
+			| CPLB_SUPV_WR | CPLB_USER_WR | CPLB_USER_RD | CPLB_VALID | ANOMALY_05000158_WORKAROUND)
+#else				/*Write Through */
+#define SDRAM_DGENERIC   (CPLB_L1_CHBL | CPLB_WT | CPLB_L1_AOW \
+			| CPLB_SUPV_WR | CPLB_USER_WR | CPLB_USER_RD | CPLB_VALID | ANOMALY_05000158_WORKAROUND | CPLB_DIRTY )
+#endif
+
+
+#define L1_DMEMORY       (CPLB_SUPV_WR | CPLB_USER_WR | CPLB_USER_RD | CPLB_VALID | ANOMALY_05000158_WORKAROUND | CPLB_LOCK | CPLB_DIRTY )
+#define SDRAM_DNON_CHBL  (CPLB_SUPV_WR | CPLB_USER_WR | CPLB_USER_RD | CPLB_VALID | ANOMALY_05000158_WORKAROUND | CPLB_DIRTY )
+#define SDRAM_EBIU       (CPLB_SUPV_WR | CPLB_USER_WR | CPLB_USER_RD | CPLB_VALID | ANOMALY_05000158_WORKAROUND | CPLB_DIRTY )
+#define SDRAM_OOPS  	 (CPLB_VALID | ANOMALY_05000158_WORKAROUND | CPLB_LOCK | CPLB_DIRTY )
+
+#define SIZE_1K 0x00000400	/* 1K */
+#define SIZE_4K 0x00001000	/* 4K */
+#define SIZE_1M 0x00100000	/* 1M */
+#define SIZE_4M 0x00400000	/* 4M */
+
+#define MAX_CPLBS (16 * 2)
+
+/*
+* Number of required data CPLB switchtable entries
+* MEMSIZE / 4 (we mostly install 4M page size CPLBs
+* approx 16 for smaller 1MB page size CPLBs for allignment purposes
+* 1 for L1 Data Memory
+* 1 for CONFIG_DEBUG_HUNT_FOR_ZERO
+* 1 for ASYNC Memory
+*/
+
+
+#define MAX_SWITCH_D_CPLBS (((CONFIG_MEM_SIZE / 4) + 16 + 1 + 1 + 1) * 2)
+
+/*
+* Number of required instruction CPLB switchtable entries
+* MEMSIZE / 4 (we mostly install 4M page size CPLBs
+* approx 12 for smaller 1MB page size CPLBs for allignment purposes
+* 1 for L1 Instruction Memory
+* 1 for CONFIG_DEBUG_HUNT_FOR_ZERO
+*/
+
+#define MAX_SWITCH_I_CPLBS (((CONFIG_MEM_SIZE / 4) + 12 + 1 + 1) * 2)
+
+#endif				/* __MACH_BF537_H__  */