powerpc/85xx: Add support for booting from NAND on MPC8572DS

Mimic support that exists on MPC8536DS on the MPC8572DS to allow booting
from NAND.

Signed-off-by: Jin Qing <b24347@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

board/freescale/mpc8572ds/config.mk

@@ -1,5 +1,5 @@
 #
-# Copyright 2007-2008 Freescale Semiconductor, Inc.
+# Copyright 2007-2008,2010 Freescale Semiconductor, Inc.
 #
 # See file CREDITS for list of people who contributed to this
 # project.
@@ -23,4 +23,10 @@
 #
 # mpc8572ds board
 #
+ifndef NAND_SPL
+ifeq ($(CONFIG_NAND), y)
+LDSCRIPT := $(TOPDIR)/$(CPUDIR)/u-boot-nand.lds
+endif
+endif
+
 RESET_VECTOR_ADDRESS = 0xeffffffc

board/freescale/mpc8572ds/tlb.c

@@ -1,5 +1,5 @@
 /*
- * Copyright 2008 Freescale Semiconductor, Inc.
+ * Copyright 2008-2010 Freescale Semiconductor, Inc.
  *
  * (C) Copyright 2000
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
@@ -85,6 +85,18 @@ struct fsl_e_tlb_entry tlb_table[] = {
 	SET_TLB_ENTRY(1, PIXIS_BASE, PIXIS_BASE_PHYS,
 		      MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G,
 		      0, 8, BOOKE_PAGESZ_4K, 1),
+
+#if defined(CONFIG_SYS_RAMBOOT) && defined(CONFIG_SYS_INIT_L2_ADDR)
+	/* *I*G - L2SRAM */
+	SET_TLB_ENTRY(1, CONFIG_SYS_INIT_L2_ADDR,
+			CONFIG_SYS_INIT_L2_ADDR_PHYS,
+			MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G,
+			0, 9, BOOKE_PAGESZ_256K, 1),
+	SET_TLB_ENTRY(1, CONFIG_SYS_INIT_L2_ADDR + 0x40000,
+			CONFIG_SYS_INIT_L2_ADDR_PHYS + 0x40000,
+			MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G,
+			0, 10, BOOKE_PAGESZ_256K, 1),
+#endif
 };
 
 int num_tlb_entries = ARRAY_SIZE(tlb_table);

boards.cfg

@@ -473,6 +473,7 @@ MPC8569MDS_ATM               powerpc     mpc85xx     mpc8569mds          freesca
 MPC8569MDS_NAND              powerpc     mpc85xx     mpc8569mds          freescale      -           MPC8569MDS:NAND
 MPC8572DS                    powerpc     mpc85xx     mpc8572ds           freescale      -           MPC8572DS
 MPC8572DS_36BIT              powerpc     mpc85xx     mpc8572ds           freescale      -           MPC8572DS:36BIT
+MPC8572DS_NAND               powerpc     mpc85xx     mpc8572ds           freescale      -           MPC8572DS:NAND
 P1011RDB                     powerpc     mpc85xx     p1_p2_rdb           freescale      -           P1_P2_RDB:P1011
 P1011RDB_NAND                powerpc     mpc85xx     p1_p2_rdb           freescale      -           P1_P2_RDB:P1011,NAND
 P1011RDB_SDCARD              powerpc     mpc85xx     p1_p2_rdb           freescale      -           P1_P2_RDB:P1011,SDCARD

include/configs/MPC8572DS.h

@@ -33,6 +33,25 @@
 #define CONFIG_PHYS_64BIT
 #endif
 
+#ifdef CONFIG_NAND
+#define CONFIG_NAND_U_BOOT
+#define CONFIG_RAMBOOT_NAND
+#ifdef CONFIG_NAND_SPL
+#define CONFIG_SYS_TEXT_BASE_SPL 0xfff00000
+#define CONFIG_SYS_MONITOR_BASE	CONFIG_SYS_TEXT_BASE_SPL /* start of monitor */
+#else
+#define CONFIG_SYS_TEXT_BASE	0xf8f82000
+#endif /* CONFIG_NAND_SPL */
+#endif
+
+#ifndef CONFIG_SYS_TEXT_BASE
+#define CONFIG_SYS_TEXT_BASE	0xeff80000
+#endif
+
+#ifndef CONFIG_SYS_MONITOR_BASE
+#define CONFIG_SYS_MONITOR_BASE	CONFIG_SYS_TEXT_BASE	/* start of monitor */
+#endif
+
 /* High Level Configuration Options */
 #define CONFIG_BOOKE		1	/* BOOKE */
 #define CONFIG_E500		1	/* BOOKE e500 family */
@@ -41,10 +60,6 @@
 #define CONFIG_MPC8572DS	1
 #define CONFIG_MP		1	/* support multiple processors */
 
-#ifndef CONFIG_SYS_TEXT_BASE
-#define CONFIG_SYS_TEXT_BASE	0xeff80000
-#endif
-
 #define CONFIG_FSL_ELBC		1	/* Has Enhanced localbus controller */
 #define CONFIG_PCI		1	/* Enable PCI/PCIE */
 #define CONFIG_PCIE1		1	/* PCIE controler 1 (slot 1) */
@@ -80,11 +95,22 @@
 #define CONFIG_SYS_MEMTEST_END		0x7fffffff
 #define CONFIG_PANIC_HANG	/* do not reset board on panic */
 
+/*
+ * Config the L2 Cache as L2 SRAM
+ */
+#define CONFIG_SYS_INIT_L2_ADDR		0xf8f80000
+#ifdef CONFIG_PHYS_64BIT
+#define CONFIG_SYS_INIT_L2_ADDR_PHYS		0xff8f80000ull
+#else
+#define CONFIG_SYS_INIT_L2_ADDR_PHYS		CONFIG_SYS_INIT_L2_ADDR
+#endif
+#define CONFIG_SYS_L2_SIZE		(512 << 10)
+#define CONFIG_SYS_INIT_L2_END	(CONFIG_SYS_INIT_L2_ADDR + CONFIG_SYS_L2_SIZE)
+
 /*
  * Base addresses -- Note these are effective addresses where the
  * actual resources get mapped (not physical addresses)
  */
-#define CONFIG_SYS_CCSRBAR_DEFAULT	0xff700000	/* CCSRBAR Default */
 #define CONFIG_SYS_CCSRBAR		0xffe00000	/* relocated CCSRBAR */
 #ifdef CONFIG_PHYS_64BIT
 #define CONFIG_SYS_CCSRBAR_PHYS		0xfffe00000ull	/* physical addr of CCSRBAR */
@@ -93,6 +119,12 @@
 #endif
 #define CONFIG_SYS_IMMR		CONFIG_SYS_CCSRBAR	/* PQII uses CONFIG_SYS_IMMR */
 
+#if defined(CONFIG_RAMBOOT_NAND) && !defined(CONFIG_NAND_SPL)
+#define CONFIG_SYS_CCSRBAR_DEFAULT		CONFIG_SYS_CCSRBAR
+#else
+#define CONFIG_SYS_CCSRBAR_DEFAULT	0xff700000      /* CCSRBAR Default */
+#endif
+
 /* DDR Setup */
 #define CONFIG_VERY_BIG_RAM
 #define CONFIG_FSL_DDR2
@@ -177,8 +209,11 @@
 #define CONFIG_SYS_FLASH_BASE_PHYS	CONFIG_SYS_FLASH_BASE
 #endif
 
-#define CONFIG_SYS_BR0_PRELIM  (BR_PHYS_ADDR((CONFIG_SYS_FLASH_BASE_PHYS + 0x8000000)) | BR_PS_16 | BR_V)
-#define CONFIG_SYS_OR0_PRELIM	0xf8000ff7
+
+#define CONFIG_FLASH_BR_PRELIM \
+	(BR_PHYS_ADDR((CONFIG_SYS_FLASH_BASE_PHYS + 0x8000000)) \
+	| BR_PS_16 | BR_V)
+#define CONFIG_FLASH_OR_PRELIM 0xf8000ff7
 
 #define CONFIG_SYS_BR1_PRELIM  (BR_PHYS_ADDR(CONFIG_SYS_FLASH_BASE_PHYS) | BR_PS_16 | BR_V)
 #define CONFIG_SYS_OR1_PRELIM	0xf8000ff7
@@ -193,7 +228,12 @@
 #define CONFIG_SYS_FLASH_ERASE_TOUT	60000		/* Flash Erase Timeout (ms) */
 #define CONFIG_SYS_FLASH_WRITE_TOUT	500		/* Flash Write Timeout (ms) */
 
-#define CONFIG_SYS_MONITOR_BASE	CONFIG_SYS_TEXT_BASE	/* start of monitor */
+#if defined(CONFIG_RAMBOOT_NAND)
+#define CONFIG_SYS_RAMBOOT
+#define CONFIG_SYS_EXTRA_ENV_RELOC
+#else
+#undef CONFIG_SYS_RAMBOOT
+#endif
 
 #define CONFIG_FLASH_CFI_DRIVER
 #define CONFIG_SYS_FLASH_CFI
@@ -246,6 +286,8 @@
 #define PIXIS_VWATCH		0x24    /* Watchdog Register */
 #define PIXIS_LED		0x25    /* LED Register */
 
+#define PIXIS_SPD_SYSCLK_MASK		0x7		/* SYSCLK option */
+
 /* old pixis referenced names */
 #define PIXIS_VCLKH		0x19	/* VELA VCLKH register */
 #define PIXIS_VCLKL		0x1A	/* VELA VCLKL register */
@@ -277,12 +319,22 @@
 #define CONFIG_SYS_MONITOR_LEN		(256 * 1024) /* Reserve 256 kB for Mon */
 #define CONFIG_SYS_MALLOC_LEN		(1024 * 1024)	/* Reserved for malloc */
 
+#ifndef CONFIG_NAND_SPL
 #define CONFIG_SYS_NAND_BASE		0xffa00000
 #ifdef CONFIG_PHYS_64BIT
 #define CONFIG_SYS_NAND_BASE_PHYS	0xfffa00000ull
 #else
 #define CONFIG_SYS_NAND_BASE_PHYS	CONFIG_SYS_NAND_BASE
 #endif
+#else
+#define CONFIG_SYS_NAND_BASE		0xfff00000
+#ifdef CONFIG_PHYS_64BIT
+#define CONFIG_SYS_NAND_BASE_PHYS	0xffff00000ull
+#else
+#define CONFIG_SYS_NAND_BASE_PHYS	CONFIG_SYS_NAND_BASE
+#endif
+#endif
+
 #define CONFIG_SYS_NAND_BASE_LIST     { CONFIG_SYS_NAND_BASE,\
 				CONFIG_SYS_NAND_BASE + 0x40000, \
 				CONFIG_SYS_NAND_BASE + 0x80000,\
@@ -293,6 +345,17 @@
 #define CONFIG_NAND_FSL_ELBC	1
 #define CONFIG_SYS_NAND_BLOCK_SIZE    (128 * 1024)
 
+/* NAND boot: 4K NAND loader config */
+#define CONFIG_SYS_NAND_SPL_SIZE	0x1000
+#define CONFIG_SYS_NAND_U_BOOT_SIZE	((512 << 10) - 0x2000)
+#define CONFIG_SYS_NAND_U_BOOT_DST	(CONFIG_SYS_INIT_L2_ADDR)
+#define CONFIG_SYS_NAND_U_BOOT_START \
+		(CONFIG_SYS_INIT_L2_ADDR + CONFIG_SYS_NAND_SPL_SIZE)
+#define CONFIG_SYS_NAND_U_BOOT_OFFS	(0)
+#define CONFIG_SYS_NAND_U_BOOT_RELOC	(CONFIG_SYS_INIT_L2_END - 0x2000)
+#define CONFIG_SYS_NAND_U_BOOT_RELOC_SP	((CONFIG_SYS_INIT_L2_END - 1) & ~0xF)
+
+
 /* NAND flash config */
 #define CONFIG_NAND_BR_PRELIM  (BR_PHYS_ADDR(CONFIG_SYS_NAND_BASE_PHYS) \
 			       | (2<<BR_DECC_SHIFT)    /* Use HW ECC */ \
@@ -308,9 +371,17 @@
 			       | OR_FCM_TRLX \
 			       | OR_FCM_EHTR)
 
+#ifdef CONFIG_RAMBOOT_NAND
+#define CONFIG_SYS_BR0_PRELIM  CONFIG_NAND_BR_PRELIM	/* NAND Base Address */
+#define CONFIG_SYS_OR0_PRELIM  CONFIG_NAND_OR_PRELIM	/* NAND Options */
+#define CONFIG_SYS_BR2_PRELIM  CONFIG_FLASH_BR_PRELIM	/* NOR Base Address */
+#define CONFIG_SYS_OR2_PRELIM  CONFIG_FLASH_OR_PRELIM	/* NOR Options */
+#else
+#define CONFIG_SYS_BR0_PRELIM  CONFIG_FLASH_BR_PRELIM	/* NOR Base Address */
+#define CONFIG_SYS_OR0_PRELIM  CONFIG_FLASH_OR_PRELIM	/* NOR Options */
 #define CONFIG_SYS_BR2_PRELIM  CONFIG_NAND_BR_PRELIM  /* NAND Base Address */
 #define CONFIG_SYS_OR2_PRELIM  CONFIG_NAND_OR_PRELIM  /* NAND Options */
-
+#endif
 #define CONFIG_SYS_BR4_PRELIM  (BR_PHYS_ADDR((CONFIG_SYS_NAND_BASE_PHYS + 0x40000))\
 			       | (2<<BR_DECC_SHIFT)    /* Use HW ECC */ \
 			       | BR_PS_8	       /* Port Size = 8 bit */ \
@@ -341,6 +412,9 @@
 #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_SYS_BAUDRATE_TABLE	\
 	{300, 600, 1200, 2400, 4800, 9600, 19200, 38400,115200}
@@ -546,14 +620,25 @@
 /*
  * Environment
  */
-#define CONFIG_ENV_IS_IN_FLASH	1
-#if CONFIG_SYS_MONITOR_BASE > 0xfff80000
-#define CONFIG_ENV_ADDR		0xfff80000
+
+#if defined(CONFIG_SYS_RAMBOOT)
+#if defined(CONFIG_RAMBOOT_NAND)
+#define CONFIG_ENV_IS_IN_NAND	1
+#define CONFIG_ENV_SIZE	CONFIG_SYS_NAND_BLOCK_SIZE
+#define CONFIG_ENV_OFFSET	((512 * 1024)\
+				+ CONFIG_SYS_NAND_BLOCK_SIZE)
+#endif
+
 #else
-#define CONFIG_ENV_ADDR		(CONFIG_SYS_MONITOR_BASE - CONFIG_ENV_SECT_SIZE)
+	#define CONFIG_ENV_IS_IN_FLASH	1
+	#if CONFIG_SYS_MONITOR_BASE > 0xfff80000
+	#define CONFIG_ENV_ADDR	0xfff80000
+	#else
+	#define CONFIG_ENV_ADDR	(CONFIG_SYS_MONITOR_BASE - CONFIG_ENV_SECT_SIZE)
+	#endif
+	#define CONFIG_ENV_SIZE	0x2000
+	#define CONFIG_ENV_SECT_SIZE	0x20000 /* 128K (one sector) */
 #endif
-#define CONFIG_ENV_SIZE		0x2000
-#define CONFIG_ENV_SECT_SIZE	0x20000 /* 128K (one sector) */
 
 #define CONFIG_LOADS_ECHO	1	/* echo on for serial download */
 #define CONFIG_SYS_LOADS_BAUD_CHANGE	1	/* allow baudrate change */

nand_spl/board/freescale/mpc8572ds/Makefile

@@ -0,0 +1,133 @@
+#
+# (C) Copyright 2007
+# Stefan Roese, DENX Software Engineering, sr@denx.de.
+#
+# Copyright 2009-2010 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 := 0xfff00000
+PAD_TO := 0xfff01000
+
+include $(TOPDIR)/config.mk
+
+LDSCRIPT= $(TOPDIR)/$(CPUDIR)/u-boot-nand_spl.lds
+LDFLAGS	= -Bstatic -T $(LDSCRIPT) -Ttext $(CONFIG_SYS_TEXT_BASE_SPL) $(PLATFORM_LDFLAGS)
+AFLAGS	+= -DCONFIG_NAND_SPL
+CFLAGS	+= -DCONFIG_NAND_SPL
+
+SOBJS	= start.o resetvec.o
+COBJS	= cache.o cpu_init_early.o cpu_init_nand.o fsl_law.o law.o \
+	  nand_boot.o nand_boot_fsl_elbc.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	:= $(OBJTREE)/nand_spl/board/$(BOARDDIR)
+
+nandobj	:= $(OBJTREE)/nand_spl/
+
+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)
+	cd $(LNDIR) && $(LD) $(LDFLAGS) $(__OBJS) $(PLATFORM_LIBS) \
+		-Map $(nandobj)u-boot-spl.map \
+		-o $(nandobj)u-boot-spl
+
+# create symbolic links for common files
+
+$(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)/arch/powerpc/cpu/mpc85xx/cpu_init_early.c $(obj)cpu_init_early.c
+
+$(obj)cpu_init_nand.c:
+	@rm -f $(obj)cpu_init_nand.c
+	ln -sf $(SRCTREE)/arch/powerpc/cpu/mpc85xx/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_elbc.c:
+	@rm -f $(obj)nand_boot_fsl_elbc.c
+	ln -sf $(SRCTREE)/nand_spl/nand_boot_fsl_elbc.c \
+	       $(obj)nand_boot_fsl_elbc.c
+
+$(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)/arch/powerpc/cpu/mpc85xx/fixed_ivor.S $(obj)fixed_ivor.S
+
+$(obj)start.S: $(obj)fixed_ivor.S
+	@rm -f $(obj)start.S
+	ln -sf $(SRCTREE)/arch/powerpc/cpu/mpc85xx/start.S $(obj)start.S
+
+$(obj)tlb.c:
+	@rm -f $(obj)tlb.c
+	ln -sf $(SRCTREE)/arch/powerpc/cpu/mpc85xx/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
+
+#########################################################################

nand_spl/board/freescale/mpc8572ds/nand_boot.c

@@ -0,0 +1,82 @@
+/*
+ * Copyright 2009-2010 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 <ns16550.h>
+#include <asm/io.h>
+#include <nand.h>
+
+u32 sysclk_tbl[] = {
+	33333000, 39999600, 49999500, 66666000,
+	83332500, 99999000, 133332000, 166665000
+};
+
+void board_init_f(ulong bootflag)
+{
+	int px_spd;
+	u32 plat_ratio, bus_clk, sys_clk;
+	ccsr_gur_t *gur = (void *)CONFIG_SYS_MPC85xx_GUTS_ADDR;
+
+#if defined(CONFIG_SYS_BR3_PRELIM) && defined(CONFIG_SYS_OR3_PRELIM)
+	/* for FPGA */
+	set_lbc_br(3, CONFIG_SYS_BR3_PRELIM);
+	set_lbc_or(3, CONFIG_SYS_OR3_PRELIM);
+#else
+#error CONFIG_SYS_BR3_PRELIM, CONFIG_SYS_OR3_PRELIM must be defined
+#endif
+
+	/* initialize selected port with appropriate baud rate */
+	px_spd = in_8((unsigned char *)(PIXIS_BASE + PIXIS_SPD));
+	sys_clk = sysclk_tbl[px_spd & PIXIS_SPD_SYSCLK_MASK];
+	plat_ratio = in_be32(&gur->porpllsr) & MPC85xx_PORPLLSR_PLAT_RATIO;
+	bus_clk = sys_clk * plat_ratio / 2;
+
+	NS16550_init((NS16550_t)CONFIG_SYS_NS16550_COM1,
+			bus_clk / 16 / CONFIG_BAUDRATE);
+
+	puts("\nNAND boot... ");
+
+	/* 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++);
+}