ENGR00108473 Porting i.MX51 3stack TO2 support to V2009.01

Support i.MX51 TO2.0 3stack board. And enable LAN9217 support.
NAND is not supported in this patch.

Signed-off-by: Fred Fan <r01011@freescale.com>

7 files changed, 813 insertions, 0 deletions

diff --git a/board/freescale/mx51_3stack/Makefile b/board/freescale/mx51_3stack/Makefile
new file mode 100644
index 0000000..f665a2d
--- /dev/null
+++ b/board/freescale/mx51_3stack/Makefile
@@ -0,0 +1,49 @@
+#
+# Copyright (C) 2007, Guennadi Liakhovetski <lg@denx.de>
+#
+# (C) Copyright 2009 Freescale Semiconductor, Inc.
+#
+# 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, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+# MA 02111-1307 USA
+#
+
+include $(TOPDIR)/config.mk
+
+LIB	= $(obj)lib$(BOARD).a
+
+COBJS	:= mx51_3stack.o
+SOBJS	:= lowlevel_init.o flash_header.o
+
+SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
+OBJS	:= $(addprefix $(obj),$(COBJS))
+SOBJS	:= $(addprefix $(obj),$(SOBJS))
+
+$(LIB):	$(obj).depend $(OBJS) $(SOBJS)
+	$(AR) $(ARFLAGS) $@ $(OBJS) $(SOBJS)
+
+clean:
+	rm -f $(SOBJS) $(OBJS)
+
+distclean:	clean
+	rm -f $(LIB) core *.bak .depend
+
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################
diff --git a/board/freescale/mx51_3stack/board-mx51_3stack.h b/board/freescale/mx51_3stack/board-mx51_3stack.h
new file mode 100644
index 0000000..d7c30c1
--- /dev/null
+++ b/board/freescale/mx51_3stack/board-mx51_3stack.h
@@ -0,0 +1,64 @@
+/*
+ * Copyright 2009 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#ifndef __BOARD_FREESCALE_BOARD_MX51_3STACK_H__
+#define __BOARD_FREESCALE_BOARD_MX51_3STACK_H__
+
+/*!
+ * @defgroup BRDCFG_MX51 Board Configuration Options
+ * @ingroup MSL_MX51
+ */
+
+/*!
+ * @file mx51_3stack/board-mx51_3stack.h
+ *
+ * @brief This file contains all the board level configuration options.
+ *
+ * It currently hold the options defined for MX51 3Stack Platform.
+ *
+ * @ingroup BRDCFG_MX51
+ */
+
+/* CPLD offsets */
+#define PBC_LED_CTRL		(0x20000)
+#define PBC_SB_STAT		(0x20008)
+#define PBC_ID_AAAA		(0x20040)
+#define PBC_ID_5555		(0x20048)
+#define PBC_VERSION		(0x20050)
+#define PBC_ID_CAFE		(0x20058)
+#define PBC_INT_STAT		(0x20010)
+#define PBC_INT_MASK		(0x20038)
+#define PBC_INT_REST		(0x20020)
+#define PBC_SW_RESET		(0x20060)
+
+/* LED switchs */
+#define LED_SWITCH_REG		0x00
+/* buttons */
+#define SWITCH_BUTTONS_REG	0x08
+/* status, interrupt */
+#define INTR_STATUS_REG	0x10
+#define INTR_MASK_REG		0x38
+#define INTR_RESET_REG		0x20
+/* magic word for debug CPLD */
+#define MAGIC_NUMBER1_REG	0x40
+#define MAGIC_NUMBER2_REG	0x48
+/* CPLD code version */
+#define CPLD_CODE_VER_REG	0x50
+/* magic word for debug CPLD */
+#define MAGIC_NUMBER3_REG	0x58
+/* module reset register*/
+#define MODULE_RESET_REG	0x60
+/* CPU ID and Personality ID */
+#define MCU_BOARD_ID_REG	0x68
+
+#endif				/* __BOARD_FREESCALE_BOARD_MX51_3STACK_H__ */
diff --git a/board/freescale/mx51_3stack/config.mk b/board/freescale/mx51_3stack/config.mk
new file mode 100644
index 0000000..ce7369d
--- /dev/null
+++ b/board/freescale/mx51_3stack/config.mk
@@ -0,0 +1 @@
+TEXT_BASE = 0x97800000
diff --git a/board/freescale/mx51_3stack/flash_header.S b/board/freescale/mx51_3stack/flash_header.S
new file mode 100644
index 0000000..794ab6b
--- /dev/null
+++ b/board/freescale/mx51_3stack/flash_header.S
@@ -0,0 +1,113 @@
+/*
+ * Copyright 2009 Freescale Semiconductor, Inc.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <config.h>
+#include <asm/arch/mx51.h>
+#include "board-mx51_3stack.h"
+
+#ifdef	CONFIG_FLASH_HEADER
+#ifndef CONFIG_FLASH_HEADER_OFFSET
+# error "Must define the offset of flash header"
+#endif
+#define MXC_DCD_ITEM(i, type, addr, val)	\
+dcd_node_##i:					\
+	.word type			;	\
+	.word addr			;	\
+	.word val			;	\
+
+.section ".text.flasheader", "x"
+	b	_start
+	.org	CONFIG_FLASH_HEADER_OFFSET
+app_code_jump_v:	.word	_start
+app_code_code_barker:	.word	CONFIG_FLASH_HEADER_BARKER
+app_code_csf:		.word	0
+dcd_ptr_ptr:		.word	dcd_ptr
+super_root_key:		.word	0
+dcd_ptr:		.word	dcd_array_start
+app_dest_ptr:		.word	TEXT_BASE
+dcd_array_start:
+magic:			.word	0xB17219E9
+dcd_array_size:		.word	dcd_data_end - dcd_array_start - 8
+/* DCD */
+/* DDR2 IOMUX configuration */
+MXC_DCD_ITEM(1, 4, IOMUXC_BASE_ADDR + 0x8a0, 0x200)
+MXC_DCD_ITEM(2, 4, IOMUXC_BASE_ADDR + 0x50c, 0x20c5)
+MXC_DCD_ITEM(3, 4, IOMUXC_BASE_ADDR + 0x510, 0x20c5)
+MXC_DCD_ITEM(4, 4, IOMUXC_BASE_ADDR + 0x83c, 0x2)
+MXC_DCD_ITEM(5, 4, IOMUXC_BASE_ADDR + 0x848, 0x2)
+MXC_DCD_ITEM(6, 4, IOMUXC_BASE_ADDR + 0x4b8, 0xe7)
+MXC_DCD_ITEM(7, 4, IOMUXC_BASE_ADDR + 0x4bc, 0x45)
+MXC_DCD_ITEM(8, 4, IOMUXC_BASE_ADDR + 0x4c0, 0x45)
+MXC_DCD_ITEM(9, 4, IOMUXC_BASE_ADDR + 0x4c4, 0x45)
+MXC_DCD_ITEM(10, 4, IOMUXC_BASE_ADDR + 0x4c8, 0x45)
+MXC_DCD_ITEM(11, 4, IOMUXC_BASE_ADDR + 0x820, 0x0)
+MXC_DCD_ITEM(12, 4, IOMUXC_BASE_ADDR + 0x4a4, 0x3)
+MXC_DCD_ITEM(13, 4, IOMUXC_BASE_ADDR + 0x4a8, 0x3)
+MXC_DCD_ITEM(14, 4, IOMUXC_BASE_ADDR + 0x4ac, 0xe3)
+MXC_DCD_ITEM(15, 4, IOMUXC_BASE_ADDR + 0x4b0, 0xe3)
+MXC_DCD_ITEM(16, 4, IOMUXC_BASE_ADDR + 0x4b4, 0xe3)
+MXC_DCD_ITEM(17, 4, IOMUXC_BASE_ADDR + 0x4cc, 0xe3)
+MXC_DCD_ITEM(18, 4, IOMUXC_BASE_ADDR + 0x4d0, 0xe2)
+/* Set drive strength to MAX */
+MXC_DCD_ITEM(19, 4, IOMUXC_BASE_ADDR + 0x82c, 0x6)
+MXC_DCD_ITEM(20, 4, IOMUXC_BASE_ADDR + 0x8a4, 0x6)
+MXC_DCD_ITEM(21, 4, IOMUXC_BASE_ADDR + 0x8ac, 0x6)
+MXC_DCD_ITEM(22, 4, IOMUXC_BASE_ADDR + 0x8b8, 0x6)
+/* 13 ROW, 10 COL, 32Bit, SREF=4 Micron Model */
+/* CAS=3,  BL=4 */
+MXC_DCD_ITEM(23, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDCTL0, 0x82a20000)
+MXC_DCD_ITEM(24, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDCTL1, 0x82a20000)
+MXC_DCD_ITEM(25, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDMISC, 0x000ad0d0)
+MXC_DCD_ITEM(26, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDCFG0, 0x333574aa)
+MXC_DCD_ITEM(27, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDCFG1, 0x333574aa)
+/* Init DRAM on CS0 */
+MXC_DCD_ITEM(28, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x04008008)
+MXC_DCD_ITEM(29, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x0000801a)
+MXC_DCD_ITEM(30, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x0000801b)
+MXC_DCD_ITEM(31, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x00448019)
+MXC_DCD_ITEM(32, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x07328018)
+MXC_DCD_ITEM(33, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x04008008)
+MXC_DCD_ITEM(34, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x00008010)
+MXC_DCD_ITEM(35, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x00008010)
+MXC_DCD_ITEM(36, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x06328018)
+MXC_DCD_ITEM(37, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x03808019)
+MXC_DCD_ITEM(38, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x00408019)
+MXC_DCD_ITEM(39, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x00008000)
+/* Init DRAM on CS1 */
+MXC_DCD_ITEM(40, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x0400800c)
+MXC_DCD_ITEM(41, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x0000801e)
+MXC_DCD_ITEM(42, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x0000801f)
+MXC_DCD_ITEM(43, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x0000801d)
+MXC_DCD_ITEM(44, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x0732801c)
+MXC_DCD_ITEM(45, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x0400800c)
+MXC_DCD_ITEM(46, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x00008014)
+MXC_DCD_ITEM(47, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x00008014)
+MXC_DCD_ITEM(48, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x0632801c)
+MXC_DCD_ITEM(49, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x0380801d)
+MXC_DCD_ITEM(50, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x0040801d)
+MXC_DCD_ITEM(51, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x00008004)
+MXC_DCD_ITEM(52, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDCTL0, 0xb2a20000)
+MXC_DCD_ITEM(53, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDCTL1, 0xb2a20000)
+MXC_DCD_ITEM(54, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDMISC, 0x000ad6d0)
+MXC_DCD_ITEM(55, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDCDLYGD, 0x90000000)
+MXC_DCD_ITEM(56, 4, ESDCTL_BASE_ADDR + ESDCTL_ESDSCR, 0x00000000)
+dcd_data_end:
+image_len:		.word	0x40000
+//image_len:		.word	_end - _start
+#endif
diff --git a/board/freescale/mx51_3stack/lowlevel_init.S b/board/freescale/mx51_3stack/lowlevel_init.S
new file mode 100644
index 0000000..fa15ddf
--- /dev/null
+++ b/board/freescale/mx51_3stack/lowlevel_init.S
@@ -0,0 +1,303 @@
+/*
+ * Copyright (C) 2007, Guennadi Liakhovetski <lg@denx.de>
+ *
+ * (C) Copyright 2009 Freescale Semiconductor, Inc.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <config.h>
+#include <asm/arch/mx51.h>
+#include "board-mx51_3stack.h"
+
+/*
+ * return soc version
+ * 	0x10:  TO1
+ *	0x20:  TO2
+ *	0x30:  TO3
+ */
+.macro check_soc_version ret, tmp
+.endm
+
+/*
+ * L2CC Cache setup/invalidation/disable
+ */
+.macro init_l2cc
+	/* reconfigure L2 cache aux control reg */
+	ldr r0, =0x03C000C4
+	mcr p15, 1, r0, c9, c0, 2
+.endm /* init_l2cc */
+
+/* AIPS setup - Only setup MPROTx registers.
+ * The PACR default values are good.*/
+.macro init_aips
+	/*
+	 * Set all MPROTx to be non-bufferable, trusted for R/W,
+	 * not forced to user-mode.
+	 */
+	ldr r0, =AIPS1_BASE_ADDR
+	ldr r1, =0x77777777
+	str r1, [r0, #0x0]
+	str r1, [r0, #0x4]
+	ldr r0, =AIPS2_BASE_ADDR
+	str r1, [r0, #0x0]
+	str r1, [r0, #0x4]
+	/*
+	 * Clear the on and off peripheral modules Supervisor Protect bit
+	 * for SDMA to access them. Did not change the AIPS control registers
+	 * (offset 0x20) access type
+	 */
+.endm /* init_aips */
+
+/* MAX (Multi-Layer AHB Crossbar Switch) setup */
+.macro init_max
+.endm /* init_max */
+
+/* M4IF setup */
+.macro init_m4if
+	/* VPU and IPU given higher priority (0x4)
+	 * IPU accesses with ID=0x1 given highest priority (=0xA)
+	 */
+	ldr r0, =M4IF_BASE_ADDR
+	ldr r1, =0x00000a01
+	str r1, [r0, #0x48]
+	ldr r1, =0x00000404
+	str r1, [r0, #0x40]
+.endm /* init_m4if */
+
+/* To support 133MHz DDR */
+.macro  init_drive_strength
+.endm /* init_drive_strength */
+
+/* CPLD on CS5 setup */
+.macro init_debug_board
+.endm /* init_debug_board */
+
+.macro setup_pll pll, freq
+	ldr r2, =\pll
+	ldr r1, =0x00001232
+	str r1, [r2, #PLL_DP_CTL] /* Set DPLL ON (set UPEN bit): BRMO=1 */
+	mov r1, #0x2
+	str r1, [r2, #PLL_DP_CONFIG] /* Enable auto-restart AREN bit */
+
+	str r3, [r2, #PLL_DP_OP]
+	str r3, [r2, #PLL_DP_HFS_OP]
+
+	str r4, [r2, #PLL_DP_MFD]
+	str r4, [r2, #PLL_DP_HFS_MFD]
+
+	str r5, [r2, #PLL_DP_MFN]
+	str r5, [r2, #PLL_DP_HFS_MFN]
+
+	ldr r1, =0x00001232
+	str r1, [r2, #PLL_DP_CTL]
+1:	ldr r1, [r2, #PLL_DP_CTL]
+	ands r1, r1, #0x1
+	beq 1b
+.endm
+
+.macro init_clock
+	ldr r0, =CCM_BASE_ADDR
+	mov r1, #0x00060000
+	str r1, [r0, #CLKCTL_CCDR]
+
+	/* Switch ARM to step clock */
+	mov r1, #0x4
+	str r1, [r0, #CLKCTL_CCSR]
+
+	mov r3, #DP_OP_800
+	mov r4, #DP_MFD_800
+	mov r5, #DP_MFN_800
+	setup_pll PLL1_BASE_ADDR
+	mov r3, #DP_OP_665
+	mov r4, #DP_MFD_665
+	mov r5, #DP_MFN_665
+	setup_pll PLL3_BASE_ADDR
+
+	/* Switch peripheral to PLL 3 */
+	ldr r1, =0x0000D3C0
+	str r1, [r0, #CLKCTL_CBCMR]
+	ldr r1, =0x033B9145
+	str r1, [r0, #CLKCTL_CBCDR]
+	mov r3, #DP_OP_665
+	mov r4, #DP_MFD_665
+	mov r5, #DP_MFN_665
+	setup_pll PLL2_BASE_ADDR
+
+	/* Switch peripheral to PLL2 */
+	ldr r1, =0x013B9145
+	str r1, [r0, #CLKCTL_CBCDR]
+	ldr r1, =0x0000E3C0
+	str r1, [r0, #CLKCTL_CBCMR]
+
+	mov r3, #DP_OP_216
+	mov r4, #DP_MFD_216
+	mov r5, #DP_MFN_216
+	setup_pll PLL3_BASE_ADDR
+
+	/* Set the platform clock dividers */
+	ldr r2, =ARM_BASE_ADDR
+	ldr r1, =0x00000725
+	str r1, [r2, #0x14]
+
+	/* Switch ARM back to PLL 1 */
+	mov r1, #0
+	str r1, [r0,  #CLKCTL_CCSR]
+	str r1, [r0,  #CLKCTL_CACRR]
+
+	/* Use lp_apm (24MHz) source for perclk */
+	mov r2, #0x48
+	ldr r2, [r0]
+	cmp r2, #0x10
+	ldrhs r1, =0x000020C2
+	ldrlo r1, =0x0000E3C2
+	str r1, [r0, #CLKCTL_CBCMR]
+	/* TO1.x emi = ahb, all perclk dividers are 1 since using 24MHz */
+	/* TO2.x ddr from PLL1, all perclk dividers are 1 since using 24MHz */
+	ldrhs r1, =0x59239100
+	ldrlo r1, =0x013D9100
+	strlo r1, [r0, #CLKCTL_CBCDR]
+
+	/* use PLL2 for UART source, get 66.5MHz */
+	ldr r1, =0xA5A2A020
+	str r1, [r0, #CLKCTL_CSCMR1]
+	ldr r1, =0x00C30321
+	str r1, [r0, #CLKCTL_CSCDR1]
+
+	/* make sure divider effective */
+1:	ldr r1, [r0, #CLKCTL_CDHIPR]
+	cmp r1, #0
+	bne 1b
+
+	mov r1, #0x0
+	str r1, [r0, #CLKCTL_CCDR]
+.endm
+
+.macro setup_wdog
+	ldr r0, =WDOG1_BASE_ADDR
+	mov r1, #0x30
+	strh r1, [r0]
+.endm
+
+.macro setup_sdram
+	ldr r0, =ESDCTL_BASE_ADDR
+	mov r2, #0x48
+	ldr r2, [r2]
+	cmp r2, #0x10
+	bhs 1f
+	/* Set CSD0 */
+	mov r1, #0x80000000
+	str r1, [r0, #ESDCTL_ESDCTL0]
+	/* Precharge command */
+        ldr r1, DDR_PERCHARGE_CMD
+        str r1, [r0, #ESDCTL_ESDSCR]
+        /* 2 refresh commands */
+        ldr r1, DDR_REFRESH_CMD
+        str r1, [r0, #ESDCTL_ESDSCR]
+        str r1, [r0, #ESDCTL_ESDSCR]
+        /* LMR with CAS=3 and BL=3 */
+        ldr r1, DDR_LMR1_W
+	str r1, [r0, #ESDCTL_ESDSCR]
+        /* 13 ROW, 10 COL, 32Bit, SREF=4 Micron Model */
+        ldr r1, DDR_LMR_CMD
+        str r1, [r0, #ESDCTL_ESDCTL0]
+        /* Timing parameters */
+        ldr r1, DDR_TIMING_W
+        str r1, [r0, #ESDCTL_ESDCFG0]
+        /* MDDR enable, RLAT=2 */
+        ldr r1, DDR_MISC_W
+        str r1, [r0, #ESDCTL_ESDMISC]
+        /* Normal mode */
+        mov r1, #0x00000000
+        str r1, [r0, #ESDCTL_ESDSCR]
+1:
+.endm /* setup_sdram */
+
+.section ".text.init", "x"
+
+.globl lowlevel_init
+lowlevel_init:
+	/* Platform CHIP level init*/
+#ifdef TURN_OFF_IMPRECISE_ABORT
+	mrs r0, cpsr
+	bic r0, r0, #0x100
+	msr cpsr, r0
+#endif
+
+	mrc 15, 0, r1, c1, c0, 0
+
+#ifndef BRANCH_PREDICTION_ENABLE
+    	mrc 15, 0, r0, c1, c0, 1
+    	bic r0, r0, #7
+    	mcr 15, 0, r0, c1, c0, 1
+#else
+    	mrc 15, 0, r0, c1, c0, 1
+    	orr r0, r0, #7
+    	mcr 15, 0, r0, c1, c0, 1
+    	orr r1, r1, #(1<<11)
+#endif
+
+#ifdef UNALIGNED_ACCESS_ENABLE
+    	orr r1, r1, #(1<<22)
+#endif
+
+#ifdef LOW_INT_LATENCY_ENABLE
+    	orr r1, r1, #(1<<21)
+#endif
+    	mcr 15, 0, r1, c1, c0, 0
+
+    	mov r0, #0
+#ifdef BRANCH_PREDICTION_ENABLE
+   	mcr 15, 0, r0, c15, c2, 4
+#endif
+	mcr 15, 0, r0, c7, c10, 4       /* Drain the write buffer */
+
+	init_l2cc
+
+	init_aips
+
+	setup_wdog
+
+	init_max
+
+	init_m4if
+
+	init_drive_strength
+
+	cmp pc, #PHYS_SDRAM_1
+	blo do_sdram_setup
+	cmp pc, #(PHYS_SDRAM_1 + PHYS_SDRAM_1_SIZE)
+	blo init_clock_start
+
+do_sdram_setup:
+	setup_sdram
+
+init_clock_start:
+	init_clock
+	init_debug_board
+	/*init_sdram*/
+
+	/* return from mxc_nand_load */
+	/* r12 saved upper lr*/
+	b mxc_nand_load
+
+/* Board level setting value */
+DDR_PERCHARGE_CMD:	.word 0x04008008
+DDR_REFRESH_CMD:	.word 0x00008010
+DDR_LMR1_W:		.word 0x00338018
+DDR_LMR_CMD:		.word 0xB2220000
+DDR_TIMING_W:		.word 0xB02567A9
+DDR_MISC_W:		.word 0x000A0104
diff --git a/board/freescale/mx51_3stack/mx51_3stack.c b/board/freescale/mx51_3stack/mx51_3stack.c
new file mode 100644
index 0000000..c7f93aa
--- /dev/null
+++ b/board/freescale/mx51_3stack/mx51_3stack.c
@@ -0,0 +1,211 @@
+/*
+ * Copyright (C) 2007, Guennadi Liakhovetski <lg@denx.de>
+ *
+ * (C) Copyright 2009 Freescale Semiconductor, Inc.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/errno.h>
+#include <asm/arch/mx51.h>
+#include <asm/arch/mx51_pins.h>
+#include <asm/arch/iomux.h>
+#include <i2c.h>
+#include "board-mx51_3stack.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static u32 system_rev;
+u32	mx51_io_base_addr;
+
+u32 get_board_rev(void)
+{
+	return system_rev;
+}
+
+static inline void setup_soc_rev(void)
+{
+	int reg;
+	reg = __REG(ROM_SI_REV);
+	switch (reg) {
+	case 0x02:
+		system_rev = 0x51000 | CHIP_REV_1_1;
+		break;
+	case 0x10:
+		system_rev = 0x51000 | CHIP_REV_2_0;
+		break;
+	default:
+		system_rev = 0x51000 | CHIP_REV_1_0;
+	}
+}
+
+static inline void set_board_rev(int rev)
+{
+	system_rev |= (rev & 0xF) << 8;
+}
+
+inline int is_soc_rev(int rev)
+{
+	return (system_rev & 0xFF) - rev;
+}
+
+int dram_init(void)
+{
+	gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
+	gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
+	return 0;
+}
+
+static void setup_uart(void)
+{
+	unsigned int pad = PAD_CTL_HYS_ENABLE | PAD_CTL_PKE_ENABLE |
+			 PAD_CTL_PUE_PULL | PAD_CTL_DRV_HIGH;
+	mxc_request_iomux(MX51_PIN_UART1_RXD, IOMUX_CONFIG_ALT0);
+	mxc_iomux_set_pad(MX51_PIN_UART1_RXD, pad | PAD_CTL_SRE_FAST);
+	mxc_request_iomux(MX51_PIN_UART1_TXD, IOMUX_CONFIG_ALT0);
+	mxc_iomux_set_pad(MX51_PIN_UART1_TXD, pad | PAD_CTL_SRE_FAST);
+	mxc_request_iomux(MX51_PIN_UART1_RTS, IOMUX_CONFIG_ALT0);
+	mxc_iomux_set_pad(MX51_PIN_UART1_RTS, pad);
+	mxc_request_iomux(MX51_PIN_UART1_CTS, IOMUX_CONFIG_ALT0);
+	mxc_iomux_set_pad(MX51_PIN_UART1_CTS, pad);
+}
+
+void setup_nfc(void)
+{
+	/* Enable NFC IOMUX */
+	mxc_request_iomux(MX51_PIN_NANDF_CS0, IOMUX_CONFIG_ALT0);
+	mxc_request_iomux(MX51_PIN_NANDF_CS1, IOMUX_CONFIG_ALT0);
+	mxc_request_iomux(MX51_PIN_NANDF_CS2, IOMUX_CONFIG_ALT0);
+	mxc_request_iomux(MX51_PIN_NANDF_CS3, IOMUX_CONFIG_ALT0);
+	mxc_request_iomux(MX51_PIN_NANDF_CS4, IOMUX_CONFIG_ALT0);
+	mxc_request_iomux(MX51_PIN_NANDF_CS5, IOMUX_CONFIG_ALT0);
+	mxc_request_iomux(MX51_PIN_NANDF_CS6, IOMUX_CONFIG_ALT0);
+	mxc_request_iomux(MX51_PIN_NANDF_CS7, IOMUX_CONFIG_ALT0);
+}
+
+static void setup_expio(void)
+{
+	u32 reg;
+	/* CS5 setup */
+	mxc_request_iomux(MX51_PIN_EIM_CS5, IOMUX_CONFIG_ALT0);
+	writel(0x00410089, WEIM_BASE_ADDR + 0x78 + CSGCR1);
+	writel(0x00000002, WEIM_BASE_ADDR + 0x78 + CSGCR2);
+	/* RWSC=50, RADVA=2, RADVN=6, OEA=0, OEN=0, RCSA=0, RCSN=0 */
+	writel(0x32260000, WEIM_BASE_ADDR + 0x78 + CSRCR1);
+	/* APR = 0 */
+	writel(0x00000000, WEIM_BASE_ADDR + 0x78 + CSRCR2);
+	/* WAL=0, WBED=1, WWSC=50, WADVA=2, WADVN=6, WEA=0, WEN=0,
+	 * WCSA=0, WCSN=0
+	 */
+	writel(0x72080F00, WEIM_BASE_ADDR + 0x78 + CSWCR1);
+	if ((readw(CS5_BASE_ADDR + PBC_ID_AAAA) == 0xAAAA) &&
+	    (readw(CS5_BASE_ADDR + PBC_ID_5555) == 0x5555)) {
+		if (is_soc_rev(CHIP_REV_2_0) < 0) {
+			reg = readl(CCM_BASE_ADDR + CLKCTL_CBCDR);
+			reg = (reg & (~0x70000)) | 0x30000;
+			writel(reg, CCM_BASE_ADDR + CLKCTL_CBCDR);
+			/* make sure divider effective */
+			while (readl(CCM_BASE_ADDR + CLKCTL_CDHIPR) != 0)
+				;
+			writel(0x0, CCM_BASE_ADDR + CLKCTL_CCDR);
+		}
+		mx51_io_base_addr = CS5_BASE_ADDR;
+	} else {
+		/* CS1 */
+		writel(0x00410089, WEIM_BASE_ADDR + 0x18 + CSGCR1);
+		writel(0x00000002, WEIM_BASE_ADDR + 0x18 + CSGCR2);
+		/*  RWSC=50, RADVA=2, RADVN=6, OEA=0, OEN=0, RCSA=0, RCSN=0 */
+		writel(0x32260000, WEIM_BASE_ADDR + 0x18 + CSRCR1);
+		/* APR=0 */
+		writel(0x00000000, WEIM_BASE_ADDR + 0x18 + CSRCR2);
+		/* WAL=0, WBED=1, WWSC=50, WADVA=2, WADVN=6, WEA=0,
+		 * WEN=0, WCSA=0, WCSN=0
+		 */
+		writel(0x72080F00, WEIM_BASE_ADDR + 0x18 + CSWCR1);
+		mx51_io_base_addr = CS1_BASE_ADDR;
+	}
+
+	/* Reset interrupt status reg */
+	writew(0x1F, mx51_io_base_addr + PBC_INT_REST);
+	writew(0x00, mx51_io_base_addr + PBC_INT_REST);
+	writew(0xFFFF, mx51_io_base_addr + PBC_INT_MASK);
+
+	/* Reset the XUART and Ethernet controllers */
+	reg = readw(mx51_io_base_addr + PBC_SW_RESET);
+	reg |= 0x9;
+	writew(reg, mx51_io_base_addr + PBC_SW_RESET);
+	reg &= ~0x9;
+	writew(reg, mx51_io_base_addr + PBC_SW_RESET);
+}
+
+int board_init(void)
+{
+	int pad;
+	setup_soc_rev();
+
+	gd->bd->bi_arch_number = MACH_TYPE_MX51_3DS;	/* board id for linux */
+	/* address of boot parameters */
+	gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x100;
+
+	setup_uart();
+	setup_nfc();
+	setup_expio();
+	return 0;
+}
+
+#ifdef BOARD_LATE_INIT
+int board_late_init(void)
+{
+	return 0;
+}
+#endif
+
+int checkboard(void)
+{
+	printf("Board: MX51 3STACK [");
+	switch (__REG(SRC_BASE_ADDR + 0x8)) {
+	case 0x0001:
+		printf("POR");
+		break;
+	case 0x0009:
+		printf("RST");
+		break;
+	case 0x0010:
+	case 0x0011:
+		printf("WDOG");
+		break;
+	default:
+		printf("unknown");
+	}
+	printf("]\n");
+	return 0;
+}
+
+#ifdef CONFIG_NET_MULTI
+int board_eth_init(bd_t *bis)
+{
+	int rc = -ENODEV;
+#if defined(CONFIG_DRIVER_SMC911X)
+	 rc = smc911x_initialize(bis);
+#endif
+	return rc;
+}
+#endif
diff --git a/board/freescale/mx51_3stack/u-boot.lds b/board/freescale/mx51_3stack/u-boot.lds
new file mode 100644
index 0000000..1cf3c3d
--- /dev/null
+++ b/board/freescale/mx51_3stack/u-boot.lds
@@ -0,0 +1,72 @@
+/*
+ * January 2004 - Changed to support H4 device
+ * Copyright (c) 2004 Texas Instruments
+ *
+ * (C) Copyright 2002
+ * Gary Jennejohn, DENX Software Engineering, <gj@denx.de>
+ *
+ * (C) Copyright 2009 Freescale Semiconductor, Inc.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
+OUTPUT_ARCH(arm)
+ENTRY(_start)
+SECTIONS
+{
+	. = 0x00000000;
+
+	. = ALIGN(4);
+	.text	   :
+	{
+	  /* WARNING - the following is hand-optimized to fit within	*/
+	  /* the sector layout of our flash chips!	XXX FIXME XXX	*/
+	  board/freescale/mx51_3stack/flash_header.o	(.text.flasheader)
+	  cpu/arm_cortexa8/start.o
+	  board/freescale/mx51_3stack/libmx51_3stack.a	(.text)
+	  lib_arm/libarm.a		(.text)
+	  net/libnet.a			(.text)
+	  drivers/mtd/libmtd.a		(.text)
+
+	  . = DEFINED(env_offset) ? env_offset : .;
+	  common/env_embedded.o(.text)
+
+	  *(.text)
+	}
+
+	. = ALIGN(4);
+	.rodata : { *(.rodata) }
+
+	. = ALIGN(4);
+	.data : { *(.data) }
+
+	. = ALIGN(4);
+	.got : { *(.got) }
+
+	. = .;
+	__u_boot_cmd_start = .;
+	.u_boot_cmd : { *(.u_boot_cmd) }
+	__u_boot_cmd_end = .;
+
+	. = ALIGN(4);
+	__bss_start = .;
+	.bss : { *(.bss) }
+	_end = .;
+}