ppc4xx: Add Canyonlands NAND booting support

460EX doesn't support a fixed bootstrap option to boot from 512 byte page
NAND devices. The only bootstrap option for NAND booting is option F for
2k page devices. So to boot from a 512 bype page device, the I2C bootstrap
EEPROM needs to be programmed accordingly.

This patch adds basic NAND booting support for the AMCC Canyonlands aval
board and also adds support to the "bootstrap" command, to enable NAND
booting I2C setting.

Tested with 512 byte page NAND device (32MByte) on Canyonlands.

Signed-off-by: Stefan Roese <sr@denx.de>

13 files changed, 591 insertions, 26 deletions

diff --git a/MAKEALL b/MAKEALL
index 866f3e1..01573da 100755
--- a/MAKEALL
+++ b/MAKEALL
@@ -166,6 +166,7 @@ LIST_4xx="		\
 	bubinga		\
 	CANBT		\
 	canyonlands	\
+	canyonlands_nand \
 	CMS700		\
 	CPCI2DP		\
 	CPCI405		\
diff --git a/Makefile b/Makefile
index 57bae33..4fde699 100644
--- a/Makefile
+++ b/Makefile
@@ -1173,6 +1173,14 @@ CANBT_config:	unconfig
 canyonlands_config:	unconfig
 	@$(MKCONFIG) $(@:_config=) ppc ppc4xx canyonlands amcc
 
+canyonlands_nand_config:	unconfig
+	@mkdir -p $(obj)include $(obj)board/amcc/canyonlands
+	@mkdir -p $(obj)nand_spl/board/amcc/canyonlands
+	@echo "#define CONFIG_NAND_U_BOOT" > $(obj)include/config.h
+	@$(MKCONFIG) -n $@ -a canyonlands ppc ppc4xx canyonlands amcc
+	@echo "TEXT_BASE = 0x01000000" > $(obj)board/amcc/canyonlands/config.tmp
+	@echo "CONFIG_NAND_U_BOOT = y" >> $(obj)include/config.mk
+
 CATcenter_config	\
 CATcenter_25_config	\
 CATcenter_33_config:	unconfig
diff --git a/board/amcc/canyonlands/Makefile b/board/amcc/canyonlands/Makefile
index 02281ae..7a2eaa5 100644
--- a/board/amcc/canyonlands/Makefile
+++ b/board/amcc/canyonlands/Makefile
@@ -34,7 +34,7 @@ OBJS	:= $(addprefix $(obj),$(COBJS))
 SOBJS	:= $(addprefix $(obj),$(SOBJS))
 
 $(LIB):	$(OBJS) $(SOBJS)
-	$(AR) $(ARFLAGS) $@ $(OBJS)
+	$(AR) $(ARFLAGS) $@ $(OBJS) $(SOBJS)
 
 clean:
 	rm -f $(SOBJS) $(OBJS)
diff --git a/board/amcc/canyonlands/bootstrap.c b/board/amcc/canyonlands/bootstrap.c
index 3f5822e..37fa1c9 100644
--- a/board/amcc/canyonlands/bootstrap.c
+++ b/board/amcc/canyonlands/bootstrap.c
@@ -28,7 +28,7 @@
 #include <asm/io.h>
 
 /*
- * NOR and NAND boot options change bytes 6, 7, 8, 9, 11. The
+ * NOR and NAND boot options change bytes 5, 6, 8, 9, 11. The
  * values are independent of the rest of the clock settings.
  */
 
@@ -45,14 +45,14 @@ static char *config_labels[] = {
 
 static u8 boot_configs[][17] = {
 	{
-		(NOR_COMPATIBLE),
+		(NAND_COMPATIBLE | NOR_COMPATIBLE),
 		0x86, 0x80, 0xce, 0x1f, 0x79, 0x80, 0x00, 0xa0, 0x40, 0x08,
-		0x23, 0x50, 0x0d, 0x95, 0x00, 0x00
+		0x23, 0x50, 0x0d, 0x05, 0x00, 0x00
 	},
 	{
-		(NOR_COMPATIBLE),
+		(NAND_COMPATIBLE | NOR_COMPATIBLE),
 		0x86, 0x80, 0xba, 0x14, 0x99, 0x80, 0x00, 0xa0, 0x40, 0x08,
-		0x23, 0x50, 0x0d, 0x95, 0x00, 0x00
+		0x23, 0x50, 0x0d, 0x05, 0x00, 0x00
 	},
 	{
 		0,
@@ -61,10 +61,10 @@ static u8 boot_configs[][17] = {
 };
 
 /*
- * Bytes 6,8,9,11 change for NAND boot
+ * Bytes 5,6,8,9,11 change for NAND boot
  */
 static u8 nand_boot[] = {
-	0xd0,  0xa0, 0x68, 0x58
+	0x90, 0x01,  0xa0, 0x68, 0x58
 };
 
 static int do_bootstrap(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
@@ -146,10 +146,11 @@ static int do_bootstrap(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 	buf = &boot_configs[x][1];
 
 	if (b_nand) {
-		buf[6] = nand_boot[0];
-		buf[8] = nand_boot[1];
-		buf[9] = nand_boot[2];
-		buf[11] = nand_boot[3];
+		buf[5] = nand_boot[0];
+		buf[6] = nand_boot[1];
+		buf[8] = nand_boot[2];
+		buf[9] = nand_boot[3];
+		buf[11] = nand_boot[4];
 	}
 
 	if (i2c_write(I2C_EEPROM_ADDR, 0, 1, buf, 16) != 0)
diff --git a/board/amcc/canyonlands/canyonlands.c b/board/amcc/canyonlands/canyonlands.c
index 8292d2d..3551429 100644
--- a/board/amcc/canyonlands/canyonlands.c
+++ b/board/amcc/canyonlands/canyonlands.c
@@ -134,6 +134,18 @@ u32 ddr_clktr(u32 default_val) {
 	return (SDRAM_CLKTR_CLKP_90_DEG_ADV);
 }
 
+#if defined(CONFIG_NAND_U_BOOT)
+/*
+ * NAND booting U-Boot version uses a fixed initialization, since the whole
+ * I2C SPD DIMM autodetection/calibration doesn't fit into the 4k of boot
+ * code.
+ */
+long int initdram(int board_type)
+{
+	return CFG_MBYTES_SDRAM << 20;
+}
+#endif
+
 #if defined(CFG_DRAM_TEST)
 int testdram(void)
 {
@@ -308,14 +320,14 @@ int board_early_init_r (void)
 	 * EBC address which accepts bigger regions:
 	 *
 	 * 0xfc00.0000 -> 4.cc00.0000
-	 *
-	 * For this we have to remap the CS0 and re-relocate the envrironment,
-	 * since the original FLASH location which was needed upon startup is
-	 * now not correct anymore.
 	 */
 
 	/* Remap the NOR FLASH to 0xcc00.0000 ... 0xcfff.ffff */
+#if defined(CONFIG_NAND_U_BOOT) || defined(CONFIG_NAND_SPL)
+	mtebc(pb3cr, CFG_FLASH_BASE_PHYS_L | 0xda000);
+#else
 	mtebc(pb0cr, CFG_FLASH_BASE_PHYS_L | 0xda000);
+#endif
 
 	/* Remove TLB entry of boot EBC mapping */
 	remove_tlb(CFG_BOOT_BASE_ADDR, 16 << 20);
@@ -329,6 +341,13 @@ int board_early_init_r (void)
 	 * 0xfc00.0000 is possible
 	 */
 
+	/*
+	 * Clear potential errors resulting from auto-calibration.
+	 * If not done, then we could get an interrupt later on when
+	 * exceptions are enabled.
+	 */
+	set_mcsr(get_mcsr());
+
 	return 0;
 }
 
diff --git a/board/amcc/canyonlands/init.S b/board/amcc/canyonlands/init.S
index 5d48847..b7cac23 100644
--- a/board/amcc/canyonlands/init.S
+++ b/board/amcc/canyonlands/init.S
@@ -46,7 +46,12 @@ tlbtab:
 	 * use the speed up boot process. It is patched after relocation to
 	 * enable SA_I
 	 */
+#ifndef CONFIG_NAND_SPL
 	tlbentry(CFG_BOOT_BASE_ADDR, SZ_16M, CFG_BOOT_BASE_ADDR, 4, AC_R|AC_W|AC_X|SA_G) /* TLB 0 */
+#else
+	tlbentry(CFG_NAND_BOOT_SPL_SRC, SZ_4K, CFG_NAND_BOOT_SPL_SRC, 4, AC_R|AC_W|AC_X|SA_G)
+	tlbentry(CFG_SDRAM_BASE, SZ_256M, CFG_SDRAM_BASE, 0, AC_R|AC_W|AC_X|SA_G|SA_I)
+#endif
 
 	/*
 	 * TLB entries for SDRAM are not needed on this platform.
@@ -78,7 +83,7 @@ tlbtab:
 	tlbentry(CFG_BCSR_BASE, SZ_1K, CFG_BCSR_BASE, 4, AC_R|AC_W|SA_G|SA_I)
 
 	/* TLB-entry for OCM */
-	tlbentry(CFG_OCM_BASE, SZ_4K, 0x00040000, 4, AC_R|AC_W|AC_X)
+	tlbentry(CFG_OCM_BASE, SZ_16K, 0x00040000, 4, AC_R|AC_W|AC_X|SA_I)
 
 	/* TLB-entry for Local Configuration registers => peripherals */
 	tlbentry(CFG_LOCAL_CONF_REGS, SZ_16M, CFG_LOCAL_CONF_REGS, 4, AC_R|AC_W|AC_X|SA_G|SA_I)
diff --git a/board/amcc/canyonlands/u-boot-nand.lds b/board/amcc/canyonlands/u-boot-nand.lds
new file mode 100644
index 0000000..12a5dcf
--- /dev/null
+++ b/board/amcc/canyonlands/u-boot-nand.lds
@@ -0,0 +1,137 @@
+/*
+ * (C) Copyright 2008
+ * Stefan Roese, DENX Software Engineering, sr@denx.de.
+ *
+ * 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_ARCH(powerpc)
+SEARCH_DIR(/lib); SEARCH_DIR(/usr/lib); SEARCH_DIR(/usr/local/lib); SEARCH_DIR(/usr/local/powerpc-any-elf/lib);
+SECTIONS
+{
+  /* Read-only sections, merged into text segment: */
+  . = + SIZEOF_HEADERS;
+  .interp : { *(.interp) }
+  .hash          : { *(.hash)		}
+  .dynsym        : { *(.dynsym)		}
+  .dynstr        : { *(.dynstr)		}
+  .rel.text      : { *(.rel.text)		}
+  .rela.text     : { *(.rela.text) 	}
+  .rel.data      : { *(.rel.data)		}
+  .rela.data     : { *(.rela.data) 	}
+  .rel.rodata    : { *(.rel.rodata) 	}
+  .rela.rodata   : { *(.rela.rodata) 	}
+  .rel.got       : { *(.rel.got)		}
+  .rela.got      : { *(.rela.got)		}
+  .rel.ctors     : { *(.rel.ctors)	}
+  .rela.ctors    : { *(.rela.ctors)	}
+  .rel.dtors     : { *(.rel.dtors)	}
+  .rela.dtors    : { *(.rela.dtors)	}
+  .rel.bss       : { *(.rel.bss)		}
+  .rela.bss      : { *(.rela.bss)		}
+  .rel.plt       : { *(.rel.plt)		}
+  .rela.plt      : { *(.rela.plt)		}
+  .init          : { *(.init)	}
+  .plt : { *(.plt) }
+  .text      :
+  {
+    /* WARNING - the following is hand-optimized to fit within	*/
+    /* the sector layout of our flash chips!	XXX FIXME XXX	*/
+
+    cpu/ppc4xx/start.o	(.text)
+
+    /* Align to next NAND block */
+    . = ALIGN(0x4000);
+    common/environment.o  (.ppcenv)
+    /* Keep some space here for redundant env and potential bad env blocks */
+    . = ALIGN(0x10000);
+
+    *(.text)
+    *(.fixup)
+    *(.got1)
+  }
+  _etext = .;
+  PROVIDE (etext = .);
+  .rodata    :
+  {
+    *(.rodata)
+    *(.rodata1)
+    *(.rodata.str1.4)
+  }
+  .fini      : { *(.fini)    } =0
+  .ctors     : { *(.ctors)   }
+  .dtors     : { *(.dtors)   }
+
+  /* Read-write section, merged into data segment: */
+  . = (. + 0x00FF) & 0xFFFFFF00;
+  _erotext = .;
+  PROVIDE (erotext = .);
+  .reloc   :
+  {
+    *(.got)
+    _GOT2_TABLE_ = .;
+    *(.got2)
+    _FIXUP_TABLE_ = .;
+    *(.fixup)
+  }
+  __got2_entries = (_FIXUP_TABLE_ - _GOT2_TABLE_) >>2;
+  __fixup_entries = (. - _FIXUP_TABLE_)>>2;
+
+  .data    :
+  {
+    *(.data)
+    *(.data1)
+    *(.sdata)
+    *(.sdata2)
+    *(.dynamic)
+    CONSTRUCTORS
+  }
+  _edata  =  .;
+  PROVIDE (edata = .);
+
+  . = .;
+  __u_boot_cmd_start = .;
+  .u_boot_cmd : { *(.u_boot_cmd) }
+  __u_boot_cmd_end = .;
+
+
+  . = .;
+  __start___ex_table = .;
+  __ex_table : { *(__ex_table) }
+  __stop___ex_table = .;
+
+  . = ALIGN(256);
+  __init_begin = .;
+  .text.init : { *(.text.init) }
+  .data.init : { *(.data.init) }
+  . = ALIGN(256);
+  __init_end = .;
+
+  __bss_start = .;
+  .bss (NOLOAD)       :
+  {
+   *(.sbss) *(.scommon)
+   *(.dynbss)
+   *(.bss)
+   *(COMMON)
+  }
+
+  _end = . ;
+  PROVIDE (end = .);
+}
diff --git a/cpu/ppc4xx/start.S b/cpu/ppc4xx/start.S
index cdfc943..8d2777d 100644
--- a/cpu/ppc4xx/start.S
+++ b/cpu/ppc4xx/start.S
@@ -403,7 +403,8 @@ rsttlb:	tlbwe	r0,r1,0x0000	/* Invalidate all entries (V=0)*/
 2:
 
 #if defined(CONFIG_NAND_SPL)
-#if defined(CONFIG_440EPX) || defined(CONFIG_440GRX)
+#if defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
+    defined(CONFIG_460EX) || defined(CONFIG_460GT)
 	/*
 	 * Enable internal SRAM (only on 440EPx/GRx, 440EP/GR have no OCM)
 	 */
@@ -415,6 +416,11 @@ rsttlb:	tlbwe	r0,r1,0x0000	/* Invalidate all entries (V=0)*/
 	mfdcr	r1,isram0_pmeg
 	and	r1,r1,r2		/* Disable pwr mgmt */
 	mtdcr	isram0_pmeg,r1
+#if defined(CONFIG_460EX) || defined(CONFIG_460GT)
+	lis	r1,0x4000		/* BAS = 8000_0000 */
+	ori	r1,r1,0x4580		/* 16k */
+	mtdcr	isram0_sb0cr,r1
+#endif
 #endif
 #if defined(CONFIG_440EP)
 	/*
diff --git a/include/configs/canyonlands.h b/include/configs/canyonlands.h
index e244c87..b1b4709 100644
--- a/include/configs/canyonlands.h
+++ b/include/configs/canyonlands.h
@@ -114,6 +114,65 @@
 #else
 #define	CFG_ENV_IS_IN_NAND	1	/* use NAND for environment vars  */
 #define CFG_NAND_CS		0	/* NAND chip connected to CSx */
+#define CFG_ENV_IS_EMBEDDED	1	/* use embedded environment */
+#endif
+
+/*
+ * IPL (Initial Program Loader, integrated inside CPU)
+ * Will load first 4k from NAND (SPL) into cache and execute it from there.
+ *
+ * SPL (Secondary Program Loader)
+ * Will load special U-Boot version (NUB) from NAND and execute it. This SPL
+ * has to fit into 4kByte. It sets up the CPU and configures the SDRAM
+ * controller and the NAND controller so that the special U-Boot image can be
+ * loaded from NAND to SDRAM.
+ *
+ * NUB (NAND U-Boot)
+ * This NAND U-Boot (NUB) is a special U-Boot version which can be started
+ * from RAM. Therefore it mustn't (re-)configure the SDRAM controller.
+ *
+ * On 440EPx the SPL is copied to SDRAM before the NAND controller is
+ * set up. While still running from cache, I experienced problems accessing
+ * the NAND controller.	sr - 2006-08-25
+ */
+#define CFG_NAND_BOOT_SPL_SRC	0xfffff000	/* SPL location		      */
+#define CFG_NAND_BOOT_SPL_SIZE	(4 << 10)	/* SPL size		      */
+#define CFG_NAND_BOOT_SPL_DST	(CFG_OCM_BASE + (12 << 10)) /* Copy SPL here  */
+#define CFG_NAND_U_BOOT_DST	0x01000000	/* Load NUB to this addr      */
+#define CFG_NAND_U_BOOT_START	CFG_NAND_U_BOOT_DST	/* Start NUB from     */
+							/*   this addr	      */
+#define CFG_NAND_BOOT_SPL_DELTA	(CFG_NAND_BOOT_SPL_SRC - CFG_NAND_BOOT_SPL_DST)
+
+/*
+ * Define the partitioning of the NAND chip (only RAM U-Boot is needed here)
+ */
+#define CFG_NAND_U_BOOT_OFFS	(16 << 10)	/* Offset to RAM U-Boot image */
+#define CFG_NAND_U_BOOT_SIZE	(384 << 10)	/* Size of RAM U-Boot image   */
+
+/*
+ * Now the NAND chip has to be defined (no autodetection used!)
+ */
+#define CFG_NAND_PAGE_SIZE	512		/* NAND chip page size	      */
+#define CFG_NAND_BLOCK_SIZE	(16 << 10)	/* NAND chip block size	      */
+#define CFG_NAND_PAGE_COUNT	32		/* NAND chip page count	      */
+#define CFG_NAND_BAD_BLOCK_POS	5	      /* Location of bad block marker */
+#undef CFG_NAND_4_ADDR_CYCLE		      /* No fourth addr used (<=32MB) */
+
+#define CFG_NAND_ECCSIZE	256
+#define CFG_NAND_ECCBYTES	3
+#define CFG_NAND_ECCSTEPS	(CFG_NAND_PAGE_SIZE / CFG_NAND_ECCSIZE)
+#define CFG_NAND_OOBSIZE	16
+#define CFG_NAND_ECCTOTAL	(CFG_NAND_ECCBYTES * CFG_NAND_ECCSTEPS)
+#define CFG_NAND_ECCPOS		{0, 1, 2, 3, 6, 7}
+
+#ifdef CFG_ENV_IS_IN_NAND
+/*
+ * For NAND booting the environment is embedded in the U-Boot image. Please take
+ * look at the file board/amcc/canyonlands/u-boot-nand.lds for details.
+ */
+#define CFG_ENV_SIZE		CFG_NAND_BLOCK_SIZE
+#define CFG_ENV_OFFSET		(CFG_NAND_U_BOOT_OFFS + CFG_ENV_SIZE)
+#define CFG_ENV_OFFSET_REDUND	(CFG_ENV_OFFSET + CFG_ENV_SIZE)
 #endif
 
 /*-----------------------------------------------------------------------
@@ -154,10 +213,18 @@
 /*------------------------------------------------------------------------------
  * DDR SDRAM
  *----------------------------------------------------------------------------*/
+#if !defined(CONFIG_NAND_U_BOOT)
+/*
+ * NAND booting U-Boot version uses a fixed initialization, since the whole
+ * I2C SPD DIMM autodetection/calibration doesn't fit into the 4k of boot
+ * code.
+ */
 #define CONFIG_SPD_EEPROM	1	/* Use SPD EEPROM for setup	*/
 #define SPD_EEPROM_ADDRESS	{0x50, 0x51}	/* SPD i2c spd addresses*/
 #define CONFIG_DDR_ECC		1	/* with ECC support		*/
 #define CONFIG_DDR_RQDC_FIXED	0x80000038 /* fixed value for RQDC	*/
+#endif
+#define CFG_MBYTES_SDRAM        256	/* 256MB			*/
 
 /*-----------------------------------------------------------------------
  * I2C
@@ -367,23 +434,29 @@
  * EBC address which accepts bigger regions:
  *
  * 0xfc00.0000 -> 4.cc00.0000
- *
- * For this we have to remap the CS0 and re-relocate the envrironment,
- * since the original FLASH location which was needed upon startup is
- * now not correct anymore.
  */
 
+#if defined(CONFIG_NAND_U_BOOT) || defined(CONFIG_NAND_SPL)
+/* Memory Bank 3 (NOR-FLASH) initialization					*/
+#define CFG_EBC_PB3AP		0x10055e00
+#define CFG_EBC_PB3CR		(CFG_BOOT_BASE_ADDR | 0x9a000)
+
+/* Memory Bank 0 (NAND-FLASH) initialization						*/
+#define CFG_EBC_PB0AP		0x018003c0
+#define CFG_EBC_PB0CR		(CFG_NAND_ADDR | 0x1E000) /* BAS=NAND,BS=1MB,BU=R/W,BW=32bit*/
+#else
 /* Memory Bank 0 (NOR-FLASH) initialization					*/
 #define CFG_EBC_PB0AP		0x10055e00
 #define CFG_EBC_PB0CR		(CFG_BOOT_BASE_ADDR | 0x9a000)
 
-/* Memory Bank 2 (CPLD) initialization						*/
-#define CFG_EBC_PB2AP		0x00804240
-#define CFG_EBC_PB2CR		(CFG_BCSR_BASE | 0x18000) /* BAS=CPLD,BS=1M,BU=RW,BW=32bit */
-
 /* Memory Bank 3 (NAND-FLASH) initialization						*/
 #define CFG_EBC_PB3AP		0x018003c0
 #define CFG_EBC_PB3CR		(CFG_NAND_ADDR | 0x1E000) /* BAS=NAND,BS=1MB,BU=R/W,BW=32bit*/
+#endif
+
+/* Memory Bank 2 (CPLD) initialization						*/
+#define CFG_EBC_PB2AP		0x00804240
+#define CFG_EBC_PB2CR		(CFG_BCSR_BASE | 0x18000) /* BAS=CPLD,BS=1M,BU=RW,BW=32bit */
 
 #define CFG_EBC_CFG		0xB8400000		/*  EBC0_CFG */
 
diff --git a/nand_spl/board/amcc/canyonlands/Makefile b/nand_spl/board/amcc/canyonlands/Makefile
new file mode 100644
index 0000000..1ec1112
--- /dev/null
+++ b/nand_spl/board/amcc/canyonlands/Makefile
@@ -0,0 +1,105 @@
+#
+# (C) Copyright 2008
+# Stefan Roese, DENX Software Engineering, sr@denx.de.
+#
+# 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 $(TOPDIR)/config.mk
+include $(TOPDIR)/nand_spl/board/$(BOARDDIR)/config.mk
+
+LDSCRIPT= $(TOPDIR)/nand_spl/board/$(BOARDDIR)/u-boot.lds
+LDFLAGS	= -Bstatic -T $(LDSCRIPT) -Ttext $(TEXT_BASE) $(PLATFORM_LDFLAGS)
+AFLAGS	+= -DCONFIG_NAND_SPL
+CFLAGS	+= -DCONFIG_NAND_SPL
+
+SOBJS	:= start.o
+SOBJS	+= init.o resetvec.o
+SOBJS	+= resetvec.o
+COBJS	:= ddr2_fixed.o
+COBJS	+= nand_boot.o
+COBJS	+= nand_ecc.o
+COBJS	+= ndfc.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) $$UNDEF_SYM $(__OBJS) \
+		-Map $(nandobj)u-boot-spl.map \
+		-o $(nandobj)u-boot-spl
+
+# create symbolic links for common files
+
+# from cpu directory
+$(obj)ndfc.c:
+	@rm -f $(obj)ndfc.c
+	ln -s $(SRCTREE)/cpu/ppc4xx/ndfc.c $(obj)ndfc.c
+
+$(obj)resetvec.S:
+	@rm -f $(obj)resetvec.S
+	ln -s $(SRCTREE)/cpu/ppc4xx/resetvec.S $(obj)resetvec.S
+
+$(obj)start.S:
+	@rm -f $(obj)start.S
+	ln -s $(SRCTREE)/cpu/ppc4xx/start.S $(obj)start.S
+
+# from board directory
+$(obj)init.S:
+	@rm -f $(obj)init.S
+	ln -s $(SRCTREE)/board/amcc/canyonlands/init.S $(obj)init.S
+
+# from nand_spl directory
+$(obj)nand_boot.c:
+	@rm -f $(obj)nand_boot.c
+	ln -s $(SRCTREE)/nand_spl/nand_boot.c $(obj)nand_boot.c
+
+# from drivers/mtd/nand directory
+$(obj)nand_ecc.c:
+	@rm -f $(obj)nand_ecc.c
+	ln -s $(SRCTREE)/drivers/mtd/nand/nand_ecc.c $(obj)nand_ecc.c
+
+#########################################################################
+
+$(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 $(obj).depend
+
+#########################################################################
diff --git a/nand_spl/board/amcc/canyonlands/config.mk b/nand_spl/board/amcc/canyonlands/config.mk
new file mode 100644
index 0000000..6dad876
--- /dev/null
+++ b/nand_spl/board/amcc/canyonlands/config.mk
@@ -0,0 +1,49 @@
+#
+# (C) Copyright 2008
+# Stefan Roese, DENX Software Engineering, sr@denx.de.
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+# MA 02111-1307 USA
+#
+#
+# AMCC 460EX Reference Platform (Canyonlands) board
+#
+
+#
+# TEXT_BASE for SPL:
+#
+# On 460EX platforms the SPL is located at 0xfffff000...0xffffffff,
+# in the last 4kBytes of memory space in cache.
+# We will copy this SPL into internal SRAM in start.S. So we set
+# TEXT_BASE to starting address in internal SRAM here.
+#
+TEXT_BASE = 0xE3003000
+
+# PAD_TO used to generate a 16kByte binary needed for the combined image
+# -> PAD_TO = TEXT_BASE + 0x4000
+PAD_TO	= 0xE3007000
+
+PLATFORM_CPPFLAGS += -DCONFIG_440=1
+
+ifeq ($(debug),1)
+PLATFORM_CPPFLAGS += -DDEBUG
+endif
+
+ifeq ($(dbcr),1)
+PLATFORM_CPPFLAGS += -DCFG_INIT_DBCR=0x8cff0000
+endif
diff --git a/nand_spl/board/amcc/canyonlands/ddr2_fixed.c b/nand_spl/board/amcc/canyonlands/ddr2_fixed.c
new file mode 100644
index 0000000..48708a8
--- /dev/null
+++ b/nand_spl/board/amcc/canyonlands/ddr2_fixed.c
@@ -0,0 +1,96 @@
+/*
+ * (C) Copyright 2008
+ * Stefan Roese, DENX Software Engineering, sr@denx.de.
+ *
+ * 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 <ppc4xx.h>
+#include <asm/io.h>
+#include <asm/processor.h>
+
+static void wait_init_complete(void)
+{
+	u32 val;
+
+	do {
+		mfsdram(SDRAM_MCSTAT, val);
+	} while (!(val & 0x80000000));
+}
+
+long int initdram(int board_type)
+{
+	/*
+	 * Reset the DDR-SDRAM controller.
+	 */
+	mtsdr(SDR0_SRST, (0x80000000 >> 10));
+	mtsdr(SDR0_SRST, 0x00000000);
+
+	/*
+	 * These values are cloned from a running NOR booting
+	 * Canyonlands with SPD-DDR2 detection and calibration
+	 * enabled. This will only work for the same memory
+	 * configuration as used here:
+	 *
+	 * Crucial CT3264AC53E.4FD - 256MB SO-DIMM
+	 *
+	 */
+	mtsdram(SDRAM_MCOPT2, 0x00000000);
+	mtsdram(SDRAM_MCOPT1, 0x05122000);
+	mtsdram(SDRAM_MODT0, 0x01000000);
+	mtsdram(SDRAM_CODT, 0x00800021);
+	mtsdram(SDRAM_WRDTR, 0x82000823);
+	mtsdram(SDRAM_CLKTR, 0x40000000);
+	mtsdram(SDRAM_MB0CF, 0x00000201);
+	mtsdram(SDRAM_RTR, 0x06180000);
+	mtsdram(SDRAM_SDTR1, 0x80201000);
+	mtsdram(SDRAM_SDTR2, 0x42103243);
+	mtsdram(SDRAM_SDTR3, 0x0A0D0D16);
+	mtsdram(SDRAM_MMODE, 0x00000632);
+	mtsdram(SDRAM_MEMODE, 0x00000040);
+	mtsdram(SDRAM_INITPLR0, 0xB5380000);
+	mtsdram(SDRAM_INITPLR1, 0x82100400);
+	mtsdram(SDRAM_INITPLR2, 0x80820000);
+	mtsdram(SDRAM_INITPLR3, 0x80830000);
+	mtsdram(SDRAM_INITPLR4, 0x80810040);
+	mtsdram(SDRAM_INITPLR5, 0x80800532);
+	mtsdram(SDRAM_INITPLR6, 0x82100400);
+	mtsdram(SDRAM_INITPLR7, 0x8A080000);
+	mtsdram(SDRAM_INITPLR8, 0x8A080000);
+	mtsdram(SDRAM_INITPLR9, 0x8A080000);
+	mtsdram(SDRAM_INITPLR10, 0x8A080000);
+	mtsdram(SDRAM_INITPLR11, 0x80000432);
+	mtsdram(SDRAM_INITPLR12, 0x808103C0);
+	mtsdram(SDRAM_INITPLR13, 0x80810040);
+	mtsdram(SDRAM_INITPLR14, 0x00000000);
+	mtsdram(SDRAM_INITPLR15, 0x00000000);
+
+	mtsdram(SDRAM_MCOPT2, 0x28000000);
+
+	wait_init_complete();
+
+	mtdcr(SDRAM_R0BAS, 0x0000F800);		/* MQ0_B0BAS */
+
+	mtsdram(SDRAM_RDCC, 0x40000000);
+	mtsdram(SDRAM_RQDC, 0x80000038);
+	mtsdram(SDRAM_RFDC, 0x00000257);
+
+	return CFG_MBYTES_SDRAM << 20;
+}
diff --git a/nand_spl/board/amcc/canyonlands/u-boot.lds b/nand_spl/board/amcc/canyonlands/u-boot.lds
new file mode 100644
index 0000000..5bffb5b
--- /dev/null
+++ b/nand_spl/board/amcc/canyonlands/u-boot.lds
@@ -0,0 +1,65 @@
+/*
+ * (C) Copyright 2008
+ * Stefan Roese, DENX Software Engineering, sr@denx.de.
+ *
+ * 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_ARCH(powerpc:common)
+SECTIONS
+{
+  .resetvec 0xE3003FFC :
+  {
+    *(.resetvec)
+  } = 0xffff
+
+  .text      :
+  {
+    start.o	(.text)
+    init.o	(.text)
+    nand_boot.o	(.text)
+    ddr2_fixed.o (.text)
+    ndfc.o	(.text)
+
+    *(.text)
+    *(.fixup)
+  }
+  _etext = .;
+
+  .data    :
+  {
+    *(.rodata*)
+    *(.data*)
+    *(.sdata*)
+    __got2_start = .;
+    *(.got2)
+    __got2_end = .;
+  }
+
+  _edata  =  .;
+
+  __bss_start = .;
+  .bss (NOLOAD)       :
+  {
+   *(.sbss)
+   *(.bss)
+  }
+
+  _end = . ;
+}