Patchwork [U-Boot,2/2] powerpc/85xx: Add NAND/NAND_SPL support to P1010RDB

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Submitter Kumar Gala
Date July 28, 2011, 7:37 p.m.
Message ID <1311881837-1168-2-git-send-email-galak@kernel.crashing.org>
Download mbox | patch
Permalink /patch/107301/
State Superseded
Delegated to: Kumar Gala
Headers show

Comments

Kumar Gala - July 28, 2011, 7:37 p.m.
From: Dipen Dudhat <Dipen.Dudhat@freescale.com>

And various defines to enable NAND support and NAND spl code for the
P1010RDB platform.

Signed-off-by: Dipen Dudhat <Dipen.Dudhat@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
---
 boards.cfg                                    |    2 +
 include/configs/P1010RDB.h                    |   61 +++++++++++
 nand_spl/board/freescale/p1010rdb/Makefile    |  141 +++++++++++++++++++++++++
 nand_spl/board/freescale/p1010rdb/nand_boot.c |  128 ++++++++++++++++++++++
 4 files changed, 332 insertions(+), 0 deletions(-)
 create mode 100644 nand_spl/board/freescale/p1010rdb/Makefile
 create mode 100644 nand_spl/board/freescale/p1010rdb/nand_boot.c

Patch

diff --git a/boards.cfg b/boards.cfg
index a1978ae..f1e8b1a 100644
--- a/boards.cfg
+++ b/boards.cfg
@@ -563,6 +563,8 @@  MPC8572DS_36BIT              powerpc     mpc85xx     mpc8572ds           freesca
 MPC8572DS_NAND               powerpc     mpc85xx     mpc8572ds           freescale      -           MPC8572DS:NAND
 P1010RDB_NOR                 powerpc     mpc85xx     p1010rdb            freescale      -           P1010RDB:P1010RDB
 P1010RDB_36BIT_NOR           powerpc     mpc85xx     p1010rdb            freescale      -           P1010RDB:P1010RDB,36BIT
+P1010RDB_NAND                powerpc     mpc85xx     p1010rdb            freescale      -           P1010RDB:P1010RDB,NAND
+P1010RDB_36BIT_NAND          powerpc     mpc85xx     p1010rdb            freescale      -           P1010RDB:P1010RDB,36BIT,NAND
 P1010RDB_SDCARD              powerpc     mpc85xx     p1010rdb            freescale      -           P1010RDB:P1010RDB,SDCARD
 P1010RDB_SPIFLASH            powerpc     mpc85xx     p1010rdb            freescale      -           P1010RDB:P1010RDB,SPIFLASH
 P1010RDB_36BIT_SDCARD        powerpc     mpc85xx     p1010rdb            freescale      -           P1010RDB:P1010RDB,36BIT,SDCARD
diff --git a/include/configs/P1010RDB.h b/include/configs/P1010RDB.h
index faffdd0..3363447 100644
--- a/include/configs/P1010RDB.h
+++ b/include/configs/P1010RDB.h
@@ -33,6 +33,7 @@ 
 
 #ifdef CONFIG_P1010RDB
 #define CONFIG_P1010
+#define CONFIG_NAND_FSL_IFC
 #endif
 
 #ifdef CONFIG_SDCARD
@@ -47,6 +48,17 @@ 
 #define CONFIG_RESET_VECTOR_ADDRESS	0x1107fffc
 #endif
 
+#ifdef CONFIG_NAND	/* NAND Boot */
+#define CONFIG_RAMBOOT_NAND
+#define CONFIG_NAND_U_BOOT
+#define CONFIG_SYS_TEXT_BASE_SPL	0xff800000
+#ifdef CONFIG_NAND_SPL
+#define CONFIG_SYS_MONITOR_BASE		CONFIG_SYS_TEXT_BASE_SPL
+#else
+#define CONFIG_SYS_TEXT_BASE		0x11001000
+#endif /* CONFIG_NAND_SPL */
+#endif
+
 #ifndef CONFIG_SYS_TEXT_BASE
 #define CONFIG_SYS_TEXT_BASE		0xeff80000
 #endif
@@ -224,11 +236,18 @@  extern unsigned long get_sdram_size(void);
  */
 #define CONFIG_SYS_CCSRBAR		0xffe00000	/* relocated CCSRBAR */
 
+/* "Don't relocate CCSRBAR while in NAND_SPL." */
+#if defined(CONFIG_NAND_SPL)
+#define CONFIG_SYS_CCSRBAR_PHYS	CONFIG_SYS_CCSRBAR_DEFAULT
+#else
 #ifdef CONFIG_PHYS_64BIT
 #define CONFIG_SYS_CCSRBAR_PHYS	0xfffe00000ull
 #else
 #define CONFIG_SYS_CCSRBAR_PHYS	CONFIG_SYS_CCSRBAR
 #endif
+							/* CCSRBAR */
+#endif /* CONFIG_NAND_SPL */
+
 #define CONFIG_SYS_IMMR		CONFIG_SYS_CCSRBAR	/* PQII uses */
 							/* CONFIG_SYS_IMMR */
 
@@ -316,6 +335,12 @@  extern unsigned long get_sdram_size(void);
 				| CSOR_NAND_SPRZ_16	/* Spare size = 16 */ \
 				| CSOR_NAND_PB(32))	/* 32 Pages Per Block */
 
+#define CONFIG_SYS_NAND_BASE_LIST	{ CONFIG_SYS_NAND_BASE }
+#define CONFIG_SYS_MAX_NAND_DEVICE	1
+#define CONFIG_MTD_NAND_VERIFY_WRITE
+#define CONFIG_CMD_NAND
+#define CONFIG_SYS_NAND_BLOCK_SIZE	(16 * 1024)
+
 /* NAND Flash Timing Params */
 #define CONFIG_SYS_NAND_FTIM0		FTIM0_NAND_TCCST(0x01) | \
 					FTIM0_NAND_TWP(0x0C)   | \
@@ -333,6 +358,22 @@  extern unsigned long get_sdram_size(void);
 #define CONFIG_SYS_NAND_DDR_LAW		11
 
 /* Set up IFC registers for boot location NOR/NAND */
+#ifdef CONFIG_NAND_U_BOOT
+#define CONFIG_SYS_CSPR0		CONFIG_SYS_NAND_CSPR
+#define CONFIG_SYS_AMASK0		CONFIG_SYS_NAND_AMASK
+#define CONFIG_SYS_CSOR0		CONFIG_SYS_NAND_CSOR
+#define CONFIG_SYS_CS0_FTIM0		CONFIG_SYS_NAND_FTIM0
+#define CONFIG_SYS_CS0_FTIM1		CONFIG_SYS_NAND_FTIM1
+#define CONFIG_SYS_CS0_FTIM2		CONFIG_SYS_NAND_FTIM2
+#define CONFIG_SYS_CS0_FTIM3		CONFIG_SYS_NAND_FTIM3
+#define CONFIG_SYS_CSPR1		CONFIG_SYS_NOR_CSPR
+#define CONFIG_SYS_AMASK1		CONFIG_SYS_NOR_AMASK
+#define CONFIG_SYS_CSOR1		CONFIG_SYS_NOR_CSOR
+#define CONFIG_SYS_CS1_FTIM0		CONFIG_SYS_NOR_FTIM0
+#define CONFIG_SYS_CS1_FTIM1		CONFIG_SYS_NOR_FTIM1
+#define CONFIG_SYS_CS1_FTIM2		CONFIG_SYS_NOR_FTIM2
+#define CONFIG_SYS_CS1_FTIM3		CONFIG_SYS_NOR_FTIM3
+#else
 #define CONFIG_SYS_CSPR0		CONFIG_SYS_NOR_CSPR
 #define CONFIG_SYS_AMASK0		CONFIG_SYS_NOR_AMASK
 #define CONFIG_SYS_CSOR0		CONFIG_SYS_NOR_CSOR
@@ -347,6 +388,16 @@  extern unsigned long get_sdram_size(void);
 #define CONFIG_SYS_CS1_FTIM1		CONFIG_SYS_NAND_FTIM1
 #define CONFIG_SYS_CS1_FTIM2		CONFIG_SYS_NAND_FTIM2
 #define CONFIG_SYS_CS1_FTIM3		CONFIG_SYS_NAND_FTIM3
+#endif
+
+/* NAND boot: 8K NAND loader config */
+#define CONFIG_SYS_NAND_SPL_SIZE	0x2000
+#define CONFIG_SYS_NAND_U_BOOT_SIZE	(512 << 10)
+#define CONFIG_SYS_NAND_U_BOOT_DST	(0x11000000 - CONFIG_SYS_NAND_SPL_SIZE)
+#define CONFIG_SYS_NAND_U_BOOT_START	0x11000000
+#define CONFIG_SYS_NAND_U_BOOT_OFFS	(0)
+#define CONFIG_SYS_NAND_U_BOOT_RELOC	0x10000
+#define CONFIG_SYS_NAND_U_BOOT_RELOC_SP	(CONFIG_SYS_NAND_U_BOOT_RELOC + 0x10000)
 
 /* CPLD on IFC */
 #define CONFIG_SYS_CPLD_BASE		0xffb00000
@@ -404,6 +455,9 @@  extern unsigned long get_sdram_size(void);
 #define CONFIG_SYS_NS16550_SERIAL
 #define CONFIG_SYS_NS16550_REG_SIZE	1
 #define CONFIG_SYS_NS16550_CLK		get_bus_freq(0)
+#ifdef CONFIG_NAND_SPL
+#define CONFIG_NS16550_MIN_FUNCTIONS
+#endif
 
 #define CONFIG_SERIAL_MULTI		/* Enable both serial ports */
 #define CONFIG_SYS_CONSOLE_IS_IN_ENV	/* determine from environment */
@@ -460,6 +514,7 @@  extern unsigned long get_sdram_size(void);
  * SPI interface will not be available in case of NAND boot SPI CS0 will be
  * used for SLIC
  */
+#ifndef CONFIG_NAND_U_BOOT
 /* eSPI - Enhanced SPI */
 #define CONFIG_FSL_ESPI
 #define CONFIG_SPI_FLASH
@@ -467,6 +522,7 @@  extern unsigned long get_sdram_size(void);
 #define CONFIG_CMD_SF
 #define CONFIG_SF_DEFAULT_SPEED		10000000
 #define CONFIG_SF_DEFAULT_MODE		SPI_MODE_0
+#endif
 
 #if defined(CONFIG_TSEC_ENET)
 #ifndef CONFIG_NET_MULTI
@@ -567,6 +623,11 @@  extern unsigned long get_sdram_size(void);
 #define CONFIG_ENV_OFFSET	0x100000	/* 1MB */
 #define CONFIG_ENV_SECT_SIZE	0x10000
 #define CONFIG_ENV_SIZE		0x2000
+#elif defined(CONFIG_NAND_U_BOOT)
+#define CONFIG_ENV_IS_IN_NAND
+#define CONFIG_ENV_SIZE		CONFIG_SYS_NAND_BLOCK_SIZE
+#define CONFIG_ENV_OFFSET	CONFIG_SYS_NAND_U_BOOT_SIZE
+#define CONFIG_ENV_RANGE	(3 * CONFIG_ENV_SIZE)
 #else
 #define CONFIG_ENV_IS_NOWHERE		/* Store ENV in memory only */
 #define CONFIG_ENV_ADDR			(CONFIG_SYS_MONITOR_BASE - 0x1000)
diff --git a/nand_spl/board/freescale/p1010rdb/Makefile b/nand_spl/board/freescale/p1010rdb/Makefile
new file mode 100644
index 0000000..8d240ea
--- /dev/null
+++ b/nand_spl/board/freescale/p1010rdb/Makefile
@@ -0,0 +1,141 @@ 
+#
+# (C) Copyright 2007
+# Stefan Roese, DENX Software Engineering, sr@denx.de.
+#
+# Copyright 2011 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
+#
+
+NAND_SPL := y
+CONFIG_SYS_TEXT_BASE_SPL := 0xff800000
+PAD_TO := 0xff802000
+
+include $(TOPDIR)/config.mk
+
+nandobj	:= $(OBJTREE)/nand_spl/
+
+LDSCRIPT= $(TOPDIR)/$(CPUDIR)/u-boot-nand_spl.lds
+LDFLAGS := -T $(nandobj)u-boot-nand_spl.lds -Ttext $(CONFIG_SYS_TEXT_BASE_SPL) $(LDFLAGS) \
+	   $(LDFLAGS_FINAL)
+AFLAGS	+= -DCONFIG_NAND_SPL
+CFLAGS	+= -DCONFIG_NAND_SPL
+
+SOBJS	= start.o resetvec.o ticks.o
+COBJS	= cache.o cpu_init_early.o cpu_init_nand.o fsl_law.o law.o \
+	  nand_boot.o nand_boot_fsl_ifc.o ns16550.o tlb.o tlb_table.o
+
+SRCS	:= $(addprefix $(obj),$(SOBJS:.o=.S) $(COBJS:.o=.c))
+OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
+__OBJS	:= $(SOBJS) $(COBJS)
+LNDIR	:= $(nandobj)board/$(BOARDDIR)
+
+ALL	= $(nandobj)u-boot-spl $(nandobj)u-boot-spl.bin $(nandobj)u-boot-spl-16k.bin
+
+all:	$(obj).depend $(ALL)
+
+$(nandobj)u-boot-spl-16k.bin: $(nandobj)u-boot-spl
+	$(OBJCOPY) ${OBJCFLAGS} --pad-to=$(PAD_TO) -O binary $< $@
+
+$(nandobj)u-boot-spl.bin:	$(nandobj)u-boot-spl
+	$(OBJCOPY) ${OBJCFLAGS} -O binary $< $@
+
+$(nandobj)u-boot-spl:	$(OBJS) $(nandobj)u-boot-nand_spl.lds
+	cd $(LNDIR) && $(LD) $(LDFLAGS) $(__OBJS) $(PLATFORM_LIBS) \
+		-Map $(nandobj)u-boot-spl.map \
+		-o $(nandobj)u-boot-spl
+
+$(nandobj)u-boot-nand_spl.lds: $(LDSCRIPT)
+	$(CPP) $(CPPFLAGS) $(LDPPFLAGS) -ansi -D__ASSEMBLY__ -P - <$^ >$@
+
+# create symbolic links for common files
+
+$(obj)cache.c:
+	@rm -f $(obj)cache.c
+	ln -sf $(SRCTREE)/arch/powerpc/lib/cache.c $(obj)cache.c
+
+$(obj)cpu_init_early.c:
+	@rm -f $(obj)cpu_init_early.c
+	ln -sf $(SRCTREE)/$(CPUDIR)/cpu_init_early.c $(obj)cpu_init_early.c
+
+$(obj)cpu_init_nand.c:
+	@rm -f $(obj)cpu_init_nand.c
+	ln -sf $(SRCTREE)/$(CPUDIR)/cpu_init_nand.c $(obj)cpu_init_nand.c
+
+$(obj)fsl_law.c:
+	@rm -f $(obj)fsl_law.c
+	ln -sf $(SRCTREE)/drivers/misc/fsl_law.c $(obj)fsl_law.c
+
+$(obj)law.c:
+	@rm -f $(obj)law.c
+	ln -sf $(SRCTREE)/board/$(BOARDDIR)/law.c $(obj)law.c
+
+$(obj)nand_boot_fsl_ifc.c:
+	@rm -f $(obj)nand_boot_fsl_ifc.c
+	ln -sf $(SRCTREE)/nand_spl/nand_boot_fsl_ifc.c \
+	       $(obj)nand_boot_fsl_ifc.c
+
+$(obj)ns16550.c:
+	@rm -f $(obj)ns16550.c
+	ln -sf $(SRCTREE)/drivers/serial/ns16550.c $(obj)ns16550.c
+
+$(obj)resetvec.S:
+	@rm -f $(obj)resetvec.S
+	ln -s $(SRCTREE)/$(CPUDIR)/resetvec.S $(obj)resetvec.S
+
+$(obj)fixed_ivor.S:
+	@rm -f $(obj)fixed_ivor.S
+	ln -sf $(SRCTREE)/$(CPUDIR)/fixed_ivor.S $(obj)fixed_ivor.S
+
+$(obj)start.S: $(obj)fixed_ivor.S
+	@rm -f $(obj)start.S
+	ln -sf $(SRCTREE)/$(CPUDIR)/start.S $(obj)start.S
+
+$(obj)ticks.S:
+	@rm -f $(obj)ticks.S
+	ln -sf $(SRCTREE)/arch/powerpc/lib/ticks.S $(obj)ticks.S
+
+$(obj)tlb.c:
+	@rm -f $(obj)tlb.c
+	ln -sf $(SRCTREE)/$(CPUDIR)/tlb.c $(obj)tlb.c
+
+$(obj)tlb_table.c:
+	@rm -f $(obj)tlb_table.c
+	ln -sf $(SRCTREE)/board/$(BOARDDIR)/tlb.c $(obj)tlb_table.c
+
+ifneq ($(OBJTREE), $(SRCTREE))
+$(obj)nand_boot.c:
+	@rm -f $(obj)nand_boot.c
+	ln -s $(SRCTREE)/nand_spl/board/$(BOARDDIR)/nand_boot.c $(obj)nand_boot.c
+endif
+
+#########################################################################
+
+$(obj)%.o:	$(obj)%.S
+	$(CC) $(AFLAGS) -c -o $@ $<
+
+$(obj)%.o:	$(obj)%.c
+	$(CC) $(CFLAGS) -c -o $@ $<
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################
diff --git a/nand_spl/board/freescale/p1010rdb/nand_boot.c b/nand_spl/board/freescale/p1010rdb/nand_boot.c
new file mode 100644
index 0000000..5bdd155
--- /dev/null
+++ b/nand_spl/board/freescale/p1010rdb/nand_boot.c
@@ -0,0 +1,128 @@ 
+/*
+ * Copyright 2011 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 <common.h>
+#include <mpc85xx.h>
+#include <asm/io.h>
+#include <ns16550.h>
+#include <nand.h>
+#include <asm/mmu.h>
+#include <asm/immap_85xx.h>
+#include <asm/fsl_ddr_sdram.h>
+#include <asm/fsl_law.h>
+
+#define udelay(x) {int i, j; for (i = 0; i < x; i++) for (j = 0; j < 10000; j++); }
+
+unsigned long ddr_freq_mhz;
+
+void sdram_init(void)
+{
+	volatile ccsr_ddr_t *ddr = (ccsr_ddr_t *)CONFIG_SYS_MPC85xx_DDR_ADDR;
+
+	out_be32(&ddr->sdram_cfg, CONFIG_SYS_DDR_CONTROL | SDRAM_CFG_32_BE);
+	out_be32(&ddr->cs0_bnds, CONFIG_SYS_DDR_CS0_BNDS);
+	out_be32(&ddr->cs0_config, CONFIG_SYS_DDR_CS0_CONFIG);
+	out_be32(&ddr->sdram_cfg_2, CONFIG_SYS_DDR_CONTROL_2);
+	out_be32(&ddr->sdram_data_init, CONFIG_SYS_DDR_DATA_INIT);
+
+	if (ddr_freq_mhz < 700) {
+		out_be32(&ddr->timing_cfg_3, CONFIG_SYS_DDR_TIMING_3_667);
+		out_be32(&ddr->timing_cfg_0, CONFIG_SYS_DDR_TIMING_0_667);
+		out_be32(&ddr->timing_cfg_1, CONFIG_SYS_DDR_TIMING_1_667);
+		out_be32(&ddr->timing_cfg_2, CONFIG_SYS_DDR_TIMING_2_667);
+		out_be32(&ddr->sdram_mode, CONFIG_SYS_DDR_MODE_1_667);
+		out_be32(&ddr->sdram_mode_2, CONFIG_SYS_DDR_MODE_2_667);
+		out_be32(&ddr->sdram_interval, CONFIG_SYS_DDR_INTERVAL_667);
+		out_be32(&ddr->sdram_clk_cntl, CONFIG_SYS_DDR_CLK_CTRL_667);
+		out_be32(&ddr->ddr_wrlvl_cntl, CONFIG_SYS_DDR_WRLVL_CONTROL_667);
+	} else {
+		out_be32(&ddr->timing_cfg_3, CONFIG_SYS_DDR_TIMING_3_800);
+		out_be32(&ddr->timing_cfg_0, CONFIG_SYS_DDR_TIMING_0_800);
+		out_be32(&ddr->timing_cfg_1, CONFIG_SYS_DDR_TIMING_1_800);
+		out_be32(&ddr->timing_cfg_2, CONFIG_SYS_DDR_TIMING_2_800);
+		out_be32(&ddr->sdram_mode, CONFIG_SYS_DDR_MODE_1_800);
+		out_be32(&ddr->sdram_mode_2, CONFIG_SYS_DDR_MODE_2_800);
+		out_be32(&ddr->sdram_interval, CONFIG_SYS_DDR_INTERVAL_800);
+		out_be32(&ddr->sdram_clk_cntl, CONFIG_SYS_DDR_CLK_CTRL_800);
+		out_be32(&ddr->ddr_wrlvl_cntl, CONFIG_SYS_DDR_WRLVL_CONTROL_800);
+	}
+
+	out_be32(&ddr->timing_cfg_4, CONFIG_SYS_DDR_TIMING_4);
+	out_be32(&ddr->timing_cfg_5, CONFIG_SYS_DDR_TIMING_5);
+	out_be32(&ddr->ddr_zq_cntl, CONFIG_SYS_DDR_ZQ_CONTROL);
+
+	asm volatile("sync;isync");
+	udelay(500);
+
+	/* Let the controller go */
+	out_be32(&ddr->sdram_cfg, in_be32(&ddr->sdram_cfg) | SDRAM_CFG_MEM_EN);
+
+	set_next_law(CONFIG_SYS_NAND_DDR_LAW, LAW_SIZE_1G, LAW_TRGT_IF_DDR_1);
+}
+
+void board_init_f(ulong bootflag)
+{
+	u32 plat_ratio, ddr_ratio;
+	unsigned long bus_clk;
+	ccsr_gur_t *gur = (void *)CONFIG_SYS_MPC85xx_GUTS_ADDR;
+
+	/* initialize selected port with appropriate baud rate */
+	plat_ratio = in_be32(&gur->porpllsr) & MPC85xx_PORPLLSR_PLAT_RATIO;
+	plat_ratio >>= 1;
+	bus_clk = CONFIG_SYS_CLK_FREQ * plat_ratio;
+
+	ddr_ratio = in_be32(&gur->porpllsr) & MPC85xx_PORPLLSR_DDR_RATIO;
+	ddr_ratio = ddr_ratio >> MPC85xx_PORPLLSR_DDR_RATIO_SHIFT;
+	ddr_freq_mhz = (CONFIG_SYS_CLK_FREQ * ddr_ratio) / 0x1000000;
+
+	NS16550_init((NS16550_t)CONFIG_SYS_NS16550_COM1,
+			bus_clk / 16 / CONFIG_BAUDRATE);
+
+	puts("\nNAND boot... ");
+
+	/* Initialize the DDR3 */
+	sdram_init();
+
+	/* copy code to RAM and jump to it - this should not return */
+	/* NOTE - code has to be copied out of NAND buffer before
+	 * other blocks can be read.
+	 */
+	relocate_code(CONFIG_SYS_NAND_U_BOOT_RELOC_SP, 0,
+			CONFIG_SYS_NAND_U_BOOT_RELOC);
+}
+
+void board_init_r(gd_t *gd, ulong dest_addr)
+{
+	nand_boot();
+}
+
+void putc(char c)
+{
+	if (c == '\n')
+		NS16550_putc((NS16550_t)CONFIG_SYS_NS16550_COM1, '\r');
+
+	NS16550_putc((NS16550_t)CONFIG_SYS_NS16550_COM1, c);
+}
+
+void puts(const char *str)
+{
+	while (*str)
+		putc(*str++);
+}