diff --git a/cpu/ppc4xx/44x_spd_ddr.c b/cpu/ppc4xx/44x_spd_ddr.c
index b9cf5cb..b7eeaf2 100644
--- a/cpu/ppc4xx/44x_spd_ddr.c
+++ b/cpu/ppc4xx/44x_spd_ddr.c
@@ -53,6 +53,8 @@
 #include <ppc4xx.h>
 #include <asm/mmu.h>
 
+#include "ecc.h"
+
 #if defined(CONFIG_SPD_EEPROM) &&					\
 	(defined(CONFIG_440GP) || defined(CONFIG_440GX) ||		\
 	 defined(CONFIG_440EP) || defined(CONFIG_440GR))
@@ -296,10 +298,6 @@
 			unsigned long num_dimm_banks);
 static void program_tr1(void);
 
-#ifdef CONFIG_DDR_ECC
-static void program_ecc(unsigned long num_bytes);
-#endif
-
 static unsigned long program_bxcr(unsigned long *dimm_populated,
 				  unsigned char *iic0_dimm_addr,
 				  unsigned long num_dimm_banks);
@@ -418,7 +416,7 @@
 	/*
 	 * If ecc is enabled, initialize the parity bits.
 	 */
-	program_ecc(total_size);
+	ecc_init(CFG_SDRAM_BASE, total_size);
 #endif
 
 	return total_size;
@@ -1402,45 +1400,4 @@
 
 	return(bank_base_addr);
 }
-
-#ifdef CONFIG_DDR_ECC
-static void program_ecc(unsigned long num_bytes)
-{
-	unsigned long bank_base_addr;
-	unsigned long current_address;
-	unsigned long end_address;
-	unsigned long address_increment;
-	unsigned long cfg0;
-
-	/*
-	 * get Memory Controller Options 0 data
-	 */
-	mfsdram(mem_cfg0, cfg0);
-
-	/*
-	 * reset the bank_base address
-	 */
-	bank_base_addr = CFG_SDRAM_BASE;
-
-	if ((cfg0 & SDRAM_CFG0_MCHK_MASK) != SDRAM_CFG0_MCHK_NON) {
-		mtsdram(mem_cfg0, (cfg0 & ~SDRAM_CFG0_MCHK_MASK) | SDRAM_CFG0_MCHK_GEN);
-
-		if ((cfg0 & SDRAM_CFG0_DMWD_MASK) == SDRAM_CFG0_DMWD_32)
-			address_increment = 4;
-		else
-			address_increment = 8;
-
-		current_address = (unsigned long)(bank_base_addr);
-		end_address = (unsigned long)(bank_base_addr) + num_bytes;
-
-		while (current_address < end_address) {
-			*((unsigned long*)current_address) = 0x00000000;
-			current_address += address_increment;
-		}
-
-		mtsdram(mem_cfg0, (cfg0 & ~SDRAM_CFG0_MCHK_MASK) |
-			SDRAM_CFG0_MCHK_CHK);
-	}
-}
-#endif /* CONFIG_DDR_ECC */
 #endif /* CONFIG_SPD_EEPROM */
diff --git a/cpu/ppc4xx/44x_spd_ddr2.c b/cpu/ppc4xx/44x_spd_ddr2.c
index ec76b71..aa4a530 100644
--- a/cpu/ppc4xx/44x_spd_ddr2.c
+++ b/cpu/ppc4xx/44x_spd_ddr2.c
@@ -3,9 +3,12 @@
  * This SPD SDRAM detection code supports AMCC PPC44x cpu's with a
  * DDR2 controller (non Denali Core). Those currently are:
  *
- * 405:		405EX
+ * 405:		405EX(r)
  * 440/460:	440SP/440SPe/460EX/460GT
  *
+ * Copyright (c) 2008 Nuovation System Designs, LLC
+ *   Grant Erickson <gerickson@nuovations.com>
+
  * (C) Copyright 2007-2008
  * Stefan Roese, DENX Software Engineering, sr@denx.de.
  *
@@ -45,6 +48,8 @@
 #include <asm/mmu.h>
 #include <asm/cache.h>
 
+#include "ecc.h"
+
 #if defined(CONFIG_SPD_EEPROM) &&				\
 	(defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \
 	 defined(CONFIG_460EX) || defined(CONFIG_460GT))
@@ -3064,9 +3069,116 @@
 	dcr_data = mfdcr(SDRAM_R3BAS);
 	printf("        MQ3_B0BAS       = 0x%08X\n", dcr_data);
 }
-#else
+#else /* !defined(DEBUG) */
 static void ppc440sp_sdram_register_dump(void)
 {
 }
-#endif
-#endif /* CONFIG_SPD_EEPROM */
+#endif /* defined(DEBUG) */
+#elif defined(CONFIG_405EX)
+/*-----------------------------------------------------------------------------
+ * Function:	initdram
+ * Description: Configures the PPC405EX(r) DDR1/DDR2 SDRAM memory
+ * 		banks. The configuration is performed using static, compile-
+ *		time parameters.
+ *---------------------------------------------------------------------------*/
+long initdram(int board_type)
+{
+	unsigned long val;
+
+	/* Set Memory Bank Configuration Registers */
+
+	mtsdram(SDRAM_MB0CF, CFG_SDRAM0_MB0CF);
+	mtsdram(SDRAM_MB1CF, CFG_SDRAM0_MB1CF);
+	mtsdram(SDRAM_MB2CF, CFG_SDRAM0_MB2CF);
+	mtsdram(SDRAM_MB3CF, CFG_SDRAM0_MB3CF);
+
+	/* Set Memory Clock Timing Register */
+
+	mtsdram(SDRAM_CLKTR, CFG_SDRAM0_CLKTR);
+
+	/* Set Refresh Time Register */
+
+	mtsdram(SDRAM_RTR, CFG_SDRAM0_RTR);
+
+	/* Set SDRAM Timing Registers */
+
+	mtsdram(SDRAM_SDTR1, CFG_SDRAM0_SDTR1);
+	mtsdram(SDRAM_SDTR2, CFG_SDRAM0_SDTR2);
+	mtsdram(SDRAM_SDTR3, CFG_SDRAM0_SDTR3);
+
+	/* Set Mode and Extended Mode Registers */
+
+	mtsdram(SDRAM_MMODE, CFG_SDRAM0_MMODE);
+	mtsdram(SDRAM_MEMODE, CFG_SDRAM0_MEMODE);
+
+	/* Set Memory Controller Options 1 Register */
+
+	mtsdram(SDRAM_MCOPT1, CFG_SDRAM0_MCOPT1);
+
+	/* Set Manual Initialization Control Registers */
+
+	mtsdram(SDRAM_INITPLR0, CFG_SDRAM0_INITPLR0);
+	mtsdram(SDRAM_INITPLR1, CFG_SDRAM0_INITPLR1);
+	mtsdram(SDRAM_INITPLR2, CFG_SDRAM0_INITPLR2);
+	mtsdram(SDRAM_INITPLR3, CFG_SDRAM0_INITPLR3);
+	mtsdram(SDRAM_INITPLR4, CFG_SDRAM0_INITPLR4);
+	mtsdram(SDRAM_INITPLR5, CFG_SDRAM0_INITPLR5);
+	mtsdram(SDRAM_INITPLR6, CFG_SDRAM0_INITPLR6);
+	mtsdram(SDRAM_INITPLR7, CFG_SDRAM0_INITPLR7);
+	mtsdram(SDRAM_INITPLR8, CFG_SDRAM0_INITPLR8);
+	mtsdram(SDRAM_INITPLR9, CFG_SDRAM0_INITPLR9);
+	mtsdram(SDRAM_INITPLR10, CFG_SDRAM0_INITPLR10);
+	mtsdram(SDRAM_INITPLR11, CFG_SDRAM0_INITPLR11);
+	mtsdram(SDRAM_INITPLR12, CFG_SDRAM0_INITPLR12);
+	mtsdram(SDRAM_INITPLR13, CFG_SDRAM0_INITPLR13);
+	mtsdram(SDRAM_INITPLR14, CFG_SDRAM0_INITPLR14);
+	mtsdram(SDRAM_INITPLR15, CFG_SDRAM0_INITPLR15);
+
+	/* Set On-Die Termination Registers */
+
+	mtsdram(SDRAM_CODT, CFG_SDRAM0_CODT);
+	mtsdram(SDRAM_MODT0, CFG_SDRAM0_MODT0);
+	mtsdram(SDRAM_MODT1, CFG_SDRAM0_MODT1);
+
+	/* Set Write Timing Register */
+
+	mtsdram(SDRAM_WRDTR, CFG_SDRAM0_WRDTR);
+
+	/*
+	 * Start Initialization by SDRAM0_MCOPT2[SREN] = 0 and
+	 * SDRAM0_MCOPT2[IPTR] = 1
+	 */
+
+	mtsdram(SDRAM_MCOPT2, (SDRAM_MCOPT2_SREN_EXIT |
+			       SDRAM_MCOPT2_IPTR_EXECUTE));
+
+	/*
+	 * Poll SDRAM0_MCSTAT[MIC] for assertion to indicate the
+	 * completion of initialization.
+	 */
+
+	do {
+		mfsdram(SDRAM_MCSTAT, val);
+	} while ((val & SDRAM_MCSTAT_MIC_MASK) != SDRAM_MCSTAT_MIC_COMP);
+
+	/* Set Delay Control Registers */
+
+	mtsdram(SDRAM_DLCR, CFG_SDRAM0_DLCR);
+	mtsdram(SDRAM_RDCC, CFG_SDRAM0_RDCC);
+	mtsdram(SDRAM_RQDC, CFG_SDRAM0_RQDC);
+	mtsdram(SDRAM_RFDC, CFG_SDRAM0_RFDC);
+
+	/*
+	 * Enable Controller by SDRAM0_MCOPT2[DCEN] = 1:
+	 */
+
+	mfsdram(SDRAM_MCOPT2, val);
+	mtsdram(SDRAM_MCOPT2, val | SDRAM_MCOPT2_DCEN_ENABLE);
+
+#if defined(CONFIG_DDR_ECC)
+	ecc_init(CFG_SDRAM_BASE, CFG_MBYTES_SDRAM << 20);
+#endif /* defined(CONFIG_DDR_ECC) */
+
+	return (CFG_MBYTES_SDRAM << 20);
+}
+#endif /* defined(CONFIG_SPD_EEPROM) && defined(CONFIG_440SP) || ... */
diff --git a/cpu/ppc4xx/Makefile b/cpu/ppc4xx/Makefile
index 178c5c6..800bb41 100644
--- a/cpu/ppc4xx/Makefile
+++ b/cpu/ppc4xx/Makefile
@@ -45,6 +45,7 @@
 COBJS	+= cpu_init.o
 COBJS	+= denali_data_eye.o
 COBJS	+= denali_spd_ddr2.o
+COBJS	+= ecc.o
 COBJS	+= fdt.o
 COBJS	+= gpio.o
 COBJS	+= i2c.o
diff --git a/cpu/ppc4xx/cpu_init.c b/cpu/ppc4xx/cpu_init.c
index 42eabfe..1e9423a 100644
--- a/cpu/ppc4xx/cpu_init.c
+++ b/cpu/ppc4xx/cpu_init.c
@@ -32,73 +32,6 @@
 DECLARE_GLOBAL_DATA_PTR;
 #endif
 
-#ifdef CFG_INIT_DCACHE_CS
-# if (CFG_INIT_DCACHE_CS == 0)
-#  define PBxAP pb0ap
-#  define PBxCR pb0cr
-#  if (defined(CFG_EBC_PB0AP) && defined(CFG_EBC_PB0CR))
-#   define PBxAP_VAL CFG_EBC_PB0AP
-#   define PBxCR_VAL CFG_EBC_PB0CR
-#  endif
-# endif
-# if (CFG_INIT_DCACHE_CS == 1)
-#  define PBxAP pb1ap
-#  define PBxCR pb1cr
-#  if (defined(CFG_EBC_PB1AP) && defined(CFG_EBC_PB1CR))
-#   define PBxAP_VAL CFG_EBC_PB1AP
-#   define PBxCR_VAL CFG_EBC_PB1CR
-#  endif
-# endif
-# if (CFG_INIT_DCACHE_CS == 2)
-#  define PBxAP pb2ap
-#  define PBxCR pb2cr
-#  if (defined(CFG_EBC_PB2AP) && defined(CFG_EBC_PB2CR))
-#   define PBxAP_VAL CFG_EBC_PB2AP
-#   define PBxCR_VAL CFG_EBC_PB2CR
-#  endif
-# endif
-# if (CFG_INIT_DCACHE_CS == 3)
-#  define PBxAP pb3ap
-#  define PBxCR pb3cr
-#  if (defined(CFG_EBC_PB3AP) && defined(CFG_EBC_PB3CR))
-#   define PBxAP_VAL CFG_EBC_PB3AP
-#   define PBxCR_VAL CFG_EBC_PB3CR
-#  endif
-# endif
-# if (CFG_INIT_DCACHE_CS == 4)
-#  define PBxAP pb4ap
-#  define PBxCR pb4cr
-#  if (defined(CFG_EBC_PB4AP) && defined(CFG_EBC_PB4CR))
-#   define PBxAP_VAL CFG_EBC_PB4AP
-#   define PBxCR_VAL CFG_EBC_PB4CR
-#  endif
-# endif
-# if (CFG_INIT_DCACHE_CS == 5)
-#  define PBxAP pb5ap
-#  define PBxCR pb5cr
-#  if (defined(CFG_EBC_PB5AP) && defined(CFG_EBC_PB5CR))
-#   define PBxAP_VAL CFG_EBC_PB5AP
-#   define PBxCR_VAL CFG_EBC_PB5CR
-#  endif
-# endif
-# if (CFG_INIT_DCACHE_CS == 6)
-#  define PBxAP pb6ap
-#  define PBxCR pb6cr
-#  if (defined(CFG_EBC_PB6AP) && defined(CFG_EBC_PB6CR))
-#   define PBxAP_VAL CFG_EBC_PB6AP
-#   define PBxCR_VAL CFG_EBC_PB6CR
-#  endif
-# endif
-# if (CFG_INIT_DCACHE_CS == 7)
-#  define PBxAP pb7ap
-#  define PBxCR pb7cr
-#  if (defined(CFG_EBC_PB7AP) && defined(CFG_EBC_PB7CR))
-#   define PBxAP_VAL CFG_EBC_PB7AP
-#   define PBxCR_VAL CFG_EBC_PB7CR
-#  endif
-# endif
-#endif /* CFG_INIT_DCACHE_CS */
-
 #ifndef CFG_PLL_RECONFIG
 #define CFG_PLL_RECONFIG	0
 #endif
@@ -353,24 +286,6 @@
 	uint pvr = get_pvr();
 #endif
 
-#ifdef CFG_INIT_DCACHE_CS
-	/*
-	 * Flush and invalidate dcache, then disable CS for temporary stack.
-	 * Afterwards, this CS can be used for other purposes
-	 */
-	dcache_disable();   /* flush and invalidate dcache */
-	mtebc(PBxAP, 0);
-	mtebc(PBxCR, 0);    /* disable CS for temporary stack */
-
-#if (defined(PBxAP_VAL) && defined(PBxCR_VAL))
-	/*
-	 * Write new value into CS register
-	 */
-	mtebc(PBxAP, PBxAP_VAL);
-	mtebc(PBxCR, PBxCR_VAL);
-#endif
-#endif /* CFG_INIT_DCACHE_CS */
-
 	/*
 	 * Write Ethernetaddress into on-chip register
 	 */
diff --git a/cpu/ppc4xx/ecc.c b/cpu/ppc4xx/ecc.c
new file mode 100644
index 0000000..95b941d
--- /dev/null
+++ b/cpu/ppc4xx/ecc.c
@@ -0,0 +1,121 @@
+/*
+ *    Copyright (c) 2008 Nuovation System Designs, LLC
+ *      Grant Erickson <gerickson@nuovations.com>
+ *
+ *    (C) Copyright 2005-2007
+ *    Stefan Roese, DENX Software Engineering, sr@denx.de.
+ *
+ *    (C) Copyright 2002
+ *    Jun Gu, Artesyn Technology, jung@artesyncp.com
+ *
+ *    (C) Copyright 2001
+ *    Bill Hunter, Wave 7 Optics, williamhunter@attbi.com
+ *
+ *    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 abe 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
+ *
+ *    Description:
+ *	This file implements generic DRAM ECC initialization for
+ *	PowerPC processors using a SDRAM DDR/DDR2 controller,
+ *	including the 405EX(r), 440GP/GX/EP/GR, 440SP(E), and
+ *	460EX/GT.
+ */
+
+#include <common.h>
+#include <ppc4xx.h>
+#include <ppc_asm.tmpl>
+#include <ppc_defs.h>
+#include <asm/processor.h>
+#include <asm/io.h>
+
+#include "ecc.h"
+
+#if !defined(CONFIG_440EPX) && !defined(CONFIG_440GRX)
+#if defined(CONFIG_DDR_ECC) || defined(CONFIG_SDRAM_ECC)
+/*
+ *  void ecc_init()
+ *
+ *  Description:
+ *    This routine initializes a range of DRAM ECC memory with known
+ *    data and enables ECC checking.
+ *
+ *  TO DO:
+ *    - Improve performance by utilizing cache.
+ *    - Further generalize to make usable by other 4xx variants (e.g.
+ *      440EPx, et al).
+ *
+ *  Input(s):
+ *    start - A pointer to the start of memory covered by ECC requiring
+ *	      initialization.
+ *    size  - The size, in bytes, of the memory covered by ECC requiring
+ *	      initialization.
+ *
+ *  Output(s):
+ *    start - A pointer to the start of memory covered by ECC with
+ *	      CFG_ECC_PATTERN written to all locations and ECC data
+ *	      primed.
+ *
+ *  Returns:
+ *    N/A
+ */
+void ecc_init(unsigned long * const start, unsigned long size)
+{
+	const unsigned long pattern = CFG_ECC_PATTERN;
+	unsigned * const end = (unsigned long * const)((long)start + size);
+	unsigned long * current = start;
+	unsigned long mcopt1;
+	long increment;
+
+	if (start >= end)
+		return;
+
+	mfsdram(SDRAM_MCOPT1, mcopt1);
+
+	/* Enable ECC generation without checking or reporting */
+
+	mtsdram(SDRAM_MCOPT1, ((mcopt1 & ~SDRAM_MCOPT1_MCHK_MASK) |
+			       SDRAM_MCOPT1_MCHK_GEN));
+
+	increment = sizeof(u32);
+
+#if defined(CONFIG_440)
+	/*
+	 * Look at the geometry of SDRAM (data width) to determine whether we
+	 * can skip words when writing.
+	 */
+
+	if ((mcopt1 & SDRAM_MCOPT1_DMWD_MASK) != SDRAM_MCOPT1_DMWD_32)
+		increment = sizeof(u64);
+#endif /* defined(CONFIG_440) */
+
+	while (current < end) {
+		*current = pattern;
+		 current = (unsigned long *)((long)current + increment);
+	}
+
+	/* Wait until the writes are finished. */
+
+	sync();
+
+	/* Enable ECC generation with checking and no reporting */
+
+	mtsdram(SDRAM_MCOPT1, ((mcopt1 & ~SDRAM_MCOPT1_MCHK_MASK) |
+			       SDRAM_MCOPT1_MCHK_CHK));
+}
+#endif /* defined(CONFIG_DDR_ECC) || defined(CONFIG_SDRAM_ECC) */
+#endif /* !defined(CONFIG_440EPX) && !defined(CONFIG_440GRX) */
diff --git a/cpu/ppc4xx/ecc.h b/cpu/ppc4xx/ecc.h
new file mode 100644
index 0000000..da1c4fd
--- /dev/null
+++ b/cpu/ppc4xx/ecc.h
@@ -0,0 +1,42 @@
+/*
+ *    Copyright (c) 2008 Nuovation System Designs, LLC
+ *	Grant Erickson <gerickson@nuovations.com>
+ *
+ *    Copyright (c) 2007 DENX Software Engineering, GmbH
+ *	Stefan Roese <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 abe 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
+ *
+ *    Description:
+ *	This file implements ECC initialization for PowerPC processors
+ *	using the SDRAM DDR2 controller, including the 405EX(r),
+ *	440SP(E), 460EX and 460GT.
+ *
+ */
+
+#ifndef _ECC_H_
+#define _ECC_H_
+
+#if !defined(CFG_ECC_PATTERN)
+#define	CFG_ECC_PATTERN	0x00000000
+#endif /* !defined(CFG_ECC_PATTERN) */
+
+extern void ecc_init(unsigned long * const start, unsigned long size);
+
+#endif /* _ECC_H_ */
diff --git a/cpu/ppc4xx/sdram.c b/cpu/ppc4xx/sdram.c
index 2724d91..901d650 100644
--- a/cpu/ppc4xx/sdram.c
+++ b/cpu/ppc4xx/sdram.c
@@ -31,6 +31,7 @@
 #include <ppc4xx.h>
 #include <asm/processor.h>
 #include "sdram.h"
+#include "ecc.h"
 
 #ifdef CONFIG_SDRAM_BANK0
 
@@ -332,49 +333,6 @@
 	*tr1_value = (first_good + last_bad) / 2;
 }
 
-#ifdef CONFIG_SDRAM_ECC
-static void ecc_init(ulong start, ulong size)
-{
-	ulong	current_addr;		/* current byte address */
-	ulong	end_addr;		/* end of memory region */
-	ulong	addr_inc;		/* address skip between writes */
-	ulong	cfg0_reg;		/* for restoring ECC state */
-
-	/*
-	 * TODO: Enable dcache before running this test (speedup)
-	 */
-
-	mfsdram(mem_cfg0, cfg0_reg);
-	mtsdram(mem_cfg0, (cfg0_reg & ~SDRAM_CFG0_MEMCHK) | SDRAM_CFG0_MEMCHK_GEN);
-
-	/*
-	 * look at geometry of SDRAM (data width) to determine whether we
-	 * can skip words when writing
-	 */
-	if ((cfg0_reg & SDRAM_CFG0_DRAMWDTH) == SDRAM_CFG0_DRAMWDTH_32)
-		addr_inc = 4;
-	else
-		addr_inc = 8;
-
-	current_addr = start;
-	end_addr = start + size;
-
-	while (current_addr < end_addr) {
-		*((ulong *)current_addr) = 0x00000000;
-		current_addr += addr_inc;
-	}
-
-	/*
-	 * TODO: Flush dcache and disable it again
-	 */
-
-	/*
-	 * Enable ecc checking and parity errors
-	 */
-	mtsdram(mem_cfg0, (cfg0_reg & ~SDRAM_CFG0_MEMCHK) | SDRAM_CFG0_MEMCHK_CHK);
-}
-#endif
-
 /*
  * Autodetect onboard DDR SDRAM on 440 platforms
  *
diff --git a/cpu/ppc4xx/start.S b/cpu/ppc4xx/start.S
index 0008170..a5d9ec9 100644
--- a/cpu/ppc4xx/start.S
+++ b/cpu/ppc4xx/start.S
@@ -3,6 +3,8 @@
  *  Copyright (C) 1999	Magnus Damm <kieraypc01.p.y.kie.era.ericsson.se>
  *  Copyright (C) 2000,2001,2002 Wolfgang Denk <wd@denx.de>
  *  Copyright (C) 2007 Stefan Roese <sr@denx.de>, DENX Software Engineering
+ *  Copyright (c) 2008 Nuovation System Designs, LLC
+ *    Grant Erickson <gerickson@nuovations.com>
  *
  * See file CREDITS for list of people who contributed to this
  * project.
@@ -79,34 +81,100 @@
 # if (CFG_INIT_DCACHE_CS == 0)
 #  define PBxAP pb0ap
 #  define PBxCR pb0cr
+#  if (defined(CFG_EBC_PB0AP) && defined(CFG_EBC_PB0CR))
+#   define PBxAP_VAL CFG_EBC_PB0AP
+#   define PBxCR_VAL CFG_EBC_PB0CR
+#  endif
 # endif
 # if (CFG_INIT_DCACHE_CS == 1)
 #  define PBxAP pb1ap
 #  define PBxCR pb1cr
+#  if (defined(CFG_EBC_PB1AP) && defined(CFG_EBC_PB1CR))
+#   define PBxAP_VAL CFG_EBC_PB1AP
+#   define PBxCR_VAL CFG_EBC_PB1CR
+#  endif
 # endif
 # if (CFG_INIT_DCACHE_CS == 2)
 #  define PBxAP pb2ap
 #  define PBxCR pb2cr
+#  if (defined(CFG_EBC_PB2AP) && defined(CFG_EBC_PB2CR))
+#   define PBxAP_VAL CFG_EBC_PB2AP
+#   define PBxCR_VAL CFG_EBC_PB2CR
+#  endif
 # endif
 # if (CFG_INIT_DCACHE_CS == 3)
 #  define PBxAP pb3ap
 #  define PBxCR pb3cr
+#  if (defined(CFG_EBC_PB3AP) && defined(CFG_EBC_PB3CR))
+#   define PBxAP_VAL CFG_EBC_PB3AP
+#   define PBxCR_VAL CFG_EBC_PB3CR
+#  endif
 # endif
 # if (CFG_INIT_DCACHE_CS == 4)
 #  define PBxAP pb4ap
 #  define PBxCR pb4cr
+#  if (defined(CFG_EBC_PB4AP) && defined(CFG_EBC_PB4CR))
+#   define PBxAP_VAL CFG_EBC_PB4AP
+#   define PBxCR_VAL CFG_EBC_PB4CR
+#  endif
 # endif
 # if (CFG_INIT_DCACHE_CS == 5)
 #  define PBxAP pb5ap
 #  define PBxCR pb5cr
+#  if (defined(CFG_EBC_PB5AP) && defined(CFG_EBC_PB5CR))
+#   define PBxAP_VAL CFG_EBC_PB5AP
+#   define PBxCR_VAL CFG_EBC_PB5CR
+#  endif
 # endif
 # if (CFG_INIT_DCACHE_CS == 6)
 #  define PBxAP pb6ap
 #  define PBxCR pb6cr
+#  if (defined(CFG_EBC_PB6AP) && defined(CFG_EBC_PB6CR))
+#   define PBxAP_VAL CFG_EBC_PB6AP
+#   define PBxCR_VAL CFG_EBC_PB6CR
+#  endif
 # endif
 # if (CFG_INIT_DCACHE_CS == 7)
 #  define PBxAP pb7ap
 #  define PBxCR pb7cr
+#  if (defined(CFG_EBC_PB7AP) && defined(CFG_EBC_PB7CR))
+#   define PBxAP_VAL CFG_EBC_PB7AP
+#   define PBxCR_VAL CFG_EBC_PB7CR
+#  endif
+# endif
+# ifndef PBxAP_VAL
+#  define PBxAP_VAL	0
+# endif
+# ifndef PBxCR_VAL
+#  define PBxCR_VAL	0
+# endif
+/*
+ * Memory Bank x (nothingness) initialization CFG_INIT_RAM_ADDR + 64 MiB
+ * used as temporary stack pointer for the primordial stack
+ */
+# ifndef CFG_INIT_DCACHE_PBxAR
+#  define CFG_INIT_DCACHE_PBxAR	(EBC_BXAP_BME_DISABLED			| \
+				 EBC_BXAP_TWT_ENCODE(7)			| \
+				 EBC_BXAP_BCE_DISABLE			| \
+				 EBC_BXAP_BCT_2TRANS			| \
+				 EBC_BXAP_CSN_ENCODE(0)			| \
+				 EBC_BXAP_OEN_ENCODE(0)			| \
+				 EBC_BXAP_WBN_ENCODE(0)			| \
+				 EBC_BXAP_WBF_ENCODE(0)			| \
+				 EBC_BXAP_TH_ENCODE(2)			| \
+				 EBC_BXAP_RE_DISABLED			| \
+				 EBC_BXAP_SOR_NONDELAYED		| \
+				 EBC_BXAP_BEM_WRITEONLY			| \
+				 EBC_BXAP_PEN_DISABLED)
+# endif /* CFG_INIT_DCACHE_PBxAR */
+# ifndef CFG_INIT_DCACHE_PBxCR
+#  define CFG_INIT_DCACHE_PBxCR	(EBC_BXCR_BAS_ENCODE(CFG_INIT_RAM_ADDR)	| \
+				 EBC_BXCR_BS_64MB			| \
+				 EBC_BXCR_BU_RW				| \
+				 EBC_BXCR_BW_16BIT)
+# endif /* CFG_INIT_DCACHE_PBxCR */
+# ifndef CFG_INIT_RAM_PATTERN
+#  define CFG_INIT_RAM_PATTERN	0xDEADDEAD
 # endif
 #endif /* CFG_INIT_DCACHE_CS */
 
@@ -114,6 +182,23 @@
 #error Only 4k of init-ram is supported - please adjust CFG_INIT_RAM_END!
 #endif
 
+/*
+ * Unless otherwise overriden, enable two 128MB cachable instruction regions
+ * at CFG_SDRAM_BASE and another 128MB cacheable instruction region covering
+ * NOR flash at CFG_FLASH_BASE. Disable all cacheable data regions.
+ */
+#if !defined(CFG_ICACHE_SACR_VALUE)
+# define CFG_ICACHE_SACR_VALUE		\
+		(PPC_128MB_SACR_VALUE(CFG_SDRAM_BASE + (  0 << 20)) | \
+		 PPC_128MB_SACR_VALUE(CFG_SDRAM_BASE + (128 << 20)) | \
+		 PPC_128MB_SACR_VALUE(CFG_FLASH_BASE))
+#endif /* !defined(CFG_ICACHE_SACR_VALUE) */
+
+#if !defined(CFG_DCACHE_SACR_VALUE)
+# define CFG_DCACHE_SACR_VALUE		\
+		(0x00000000)
+#endif /* !defined(CFG_DCACHE_SACR_VALUE) */
+
 #define function_prolog(func_name)	.text; \
 					.align 2; \
 					.globl func_name; \
@@ -840,16 +925,16 @@
 	/* make sure above stores all comlete before going on */
 	sync
 
-	/*----------------------------------------------------------------------- */
-	/* Enable two 128MB cachable regions. */
-	/*----------------------------------------------------------------------- */
-	addis	r1,r0,0xc000
-	addi	r1,r1,0x0001
-	mticcr	r1			/* instruction cache */
+	/* Set-up icache cacheability. */
+	lis	r1, CFG_ICACHE_SACR_VALUE@h
+	ori	r1, r1, CFG_ICACHE_SACR_VALUE@l
+	mticcr	r1
+	isync
 
-	addis	r1,r0,0x0000
-	addi	r1,r1,0x0000
-	mtdccr	r1			/* data cache */
+	/* Set-up dcache cacheability. */
+	lis	r1, CFG_DCACHE_SACR_VALUE@h
+	ori	r1, r1, CFG_DCACHE_SACR_VALUE@l
+	mtdccr	r1
 
 	addis	r1,r0,CFG_INIT_RAM_ADDR@h
 	ori	r1,r1,CFG_INIT_SP_OFFSET /* set up the stack to SDRAM */
@@ -892,27 +977,20 @@
 					/* dbsr is cleared by setting bits to 1) */
 	mtdbsr	r4			/* clear/reset the dbsr */
 
-	/*----------------------------------------------------------------------- */
-	/* Invalidate I and D caches. Enable I cache for defined memory regions */
-	/* to speed things up. Leave the D cache disabled for now. It will be */
-	/* enabled/left disabled later based on user selected menu options. */
-	/* Be aware that the I cache may be disabled later based on the menu */
-	/* options as well. See miscLib/main.c. */
-	/*----------------------------------------------------------------------- */
+	/* Invalidate the i- and d-caches. */
 	bl	invalidate_icache
 	bl	invalidate_dcache
 
-	/*----------------------------------------------------------------------- */
-	/* Enable two 128MB cachable regions. */
-	/*----------------------------------------------------------------------- */
-	lis	r4,0xc000
-	ori	r4,r4,0x0001
-	mticcr	r4			/* instruction cache */
+	/* Set-up icache cacheability. */
+	lis	r4, CFG_ICACHE_SACR_VALUE@h
+	ori	r4, r4, CFG_ICACHE_SACR_VALUE@l
+	mticcr	r4
 	isync
 
-	lis	r4,0x0000
-	ori	r4,r4,0x0000
-	mtdccr	r4			/* data cache */
+	/* Set-up dcache cacheability. */
+	lis	r4, CFG_DCACHE_SACR_VALUE@h
+	ori	r4, r4, CFG_DCACHE_SACR_VALUE@l
+	mtdccr	r4
 
 #if !(defined(CFG_EBC_PB0AP) && defined(CFG_EBC_PB0CR)) || defined(CONFIG_405EX)
 	/*----------------------------------------------------------------------- */
@@ -922,9 +1000,9 @@
 #endif
 #if !(defined(CFG_INIT_DCACHE_CS) || defined(CFG_TEMP_STACK_OCM))
 	/*
-	 * Boards like the Kilauea (405EX) don't have OCM and can't use
-	 * DCache for init-ram. So setup stack here directly after the
-	 * SDRAM is initialized.
+	 * For boards that don't have OCM and can't use the data cache
+	 * for their primordial stack, setup stack here directly after the
+	 * SDRAM is initialized in ext_bus_cntlr_init.
 	 */
 	lis	r1, CFG_INIT_RAM_ADDR@h
 	ori	r1,r1,CFG_INIT_SP_OFFSET /* set up the stack in SDRAM */
@@ -1043,47 +1121,86 @@
 	/* Setup temporary stack in DCACHE or OCM if needed for SDRAM SPD. */
 	/*----------------------------------------------------------------------- */
 #ifdef CFG_INIT_DCACHE_CS
-	/*----------------------------------------------------------------------- */
-	/* Memory Bank x (nothingness) initialization 1GB+64MEG */
-	/* used as temporary stack pointer for stage0  */
-	/*----------------------------------------------------------------------- */
-	li	r4,PBxAP
-	mtdcr	ebccfga,r4
-	lis	r4,0x0380
-	ori	r4,r4,0x0480
-	mtdcr	ebccfgd,r4
+	li	r4, PBxAP
+	mtdcr	ebccfga, r4
+	lis	r4, CFG_INIT_DCACHE_PBxAR@h
+	ori	r4, r4, CFG_INIT_DCACHE_PBxAR@l
+	mtdcr	ebccfgd, r4
 
-	addi	r4,0,PBxCR
-	mtdcr	ebccfga,r4
-	lis	r4,0x400D
-	ori	r4,r4,0xa000
-	mtdcr	ebccfgd,r4
+	addi	r4, 0, PBxCR
+	mtdcr	ebccfga, r4
+	lis	r4, CFG_INIT_DCACHE_PBxCR@h
+	ori	r4, r4, CFG_INIT_DCACHE_PBxCR@l
+	mtdcr	ebccfgd, r4
 
-	/* turn on data cache for this region */
-	lis	r4,0x0080
+	/*
+	 * Enable the data cache for the 128MB storage access control region
+	 * at CFG_INIT_RAM_ADDR.
+	 */
+	mfdccr	r4
+	oris	r4, r4, PPC_128MB_SACR_VALUE(CFG_INIT_RAM_ADDR)@h
+	ori	r4, r4, PPC_128MB_SACR_VALUE(CFG_INIT_RAM_ADDR)@l
 	mtdccr	r4
 
-	/* set stack pointer and clear stack to known value */
+	/*
+	 * Preallocate data cache lines to be used to avoid a subsequent
+	 * cache miss and an ensuing machine check exception when exceptions
+	 * are enabled.
+	 */
+	li	r0, 0
 
-	lis	r1,CFG_INIT_RAM_ADDR@h
-	ori	r1,r1,CFG_INIT_SP_OFFSET@l
+	lis	r3, CFG_INIT_RAM_ADDR@h
+	ori	r3, r3, CFG_INIT_RAM_ADDR@l
 
-	li	r4,2048			/* we store 2048 words to stack */
+	lis	r4, CFG_INIT_RAM_END@h
+	ori	r4, r4, CFG_INIT_RAM_END@l
+
+	/*
+	 * Convert the size, in bytes, to the number of cache lines/blocks
+	 * to preallocate.
+	 */
+	clrlwi. r5, r4, (32 - L1_CACHE_SHIFT)
+	srwi	r5, r4, L1_CACHE_SHIFT
+	beq	..load_counter
+	addi	r5, r5, 0x0001
+..load_counter:
+	mtctr	r5
+
+	/* Preallocate the computed number of cache blocks. */
+..alloc_dcache_block:
+	dcba	r0, r3
+	addi	r3, r3, L1_CACHE_BYTES
+	bdnz	..alloc_dcache_block
+	sync
+
+	/*
+	 * Load the initial stack pointer and data area and convert the size,
+	 * in bytes, to the number of words to initialize to a known value.
+	 */
+	lis	r1, CFG_INIT_RAM_ADDR@h
+	ori	r1, r1, CFG_INIT_SP_OFFSET@l
+
+	lis	r4, (CFG_INIT_RAM_END >> 2)@h
+	ori	r4, r4, (CFG_INIT_RAM_END >> 2)@l
 	mtctr	r4
 
-	lis	r2,CFG_INIT_RAM_ADDR@h		/* we also clear data area */
-	ori	r2,r2,CFG_INIT_RAM_END@l	/* so cant copy value from r1 */
+	lis	r2, CFG_INIT_RAM_ADDR@h
+	ori	r2, r2, CFG_INIT_RAM_END@l
 
-	lis	r4,0xdead		/* we store 0xdeaddead in the stack */
-	ori	r4,r4,0xdead
+	lis	r4, CFG_INIT_RAM_PATTERN@h
+	ori	r4, r4, CFG_INIT_RAM_PATTERN@l
 
 ..stackloop:
-	stwu	r4,-4(r2)
+	stwu	r4, -4(r2)
 	bdnz	..stackloop
 
-	li	r0, 0			/* Make room for stack frame header and */
-	stwu	r0, -4(r1)		/* clear final stack frame so that	*/
-	stwu	r0, -4(r1)		/* stack backtraces terminate cleanly	*/
+	/*
+	 * Make room for stack frame header and clear final stack frame so
+	 * that stack backtraces terminate cleanly.
+	 */
+	stwu	r0, -4(r1)
+	stwu	r0, -4(r1)
+
 	/*
 	 * Set up a dummy frame to store reset vector as return address.
 	 * this causes stack underflow to reset board.
@@ -1328,33 +1445,72 @@
  * This "function" does not return, instead it continues in RAM
  * after relocating the monitor code.
  *
- * r3 = dest
- * r4 = src
- * r5 = length in bytes
- * r6 = cachelinesize
+ * r3 = Relocated stack pointer
+ * r4 = Relocated global data pointer
+ * r5 = Relocated text pointer
  */
 	.globl	relocate_code
 relocate_code:
-#ifdef CONFIG_4xx_DCACHE
+#if defined(CONFIG_4xx_DCACHE) || defined(CFG_INIT_DCACHE_CS)
 	/*
-	 * We need to flush the Init Data before the dcache will be
-	 * invalidated
+	 * We need to flush the initial global data (gd_t) before the dcache
+	 * will be invalidated.
 	 */
 
-	/* save regs */
-	mr	r9,r3
-	mr	r10,r4
-	mr	r11,r5
+	/* Save registers */
+	mr	r9, r3
+	mr	r10, r4
+	mr	r11, r5
 
-	mr	r3,r4
-	addi	r4,r4,0x200	/* should be enough for init data */
+	/* Flush initial global data range */
+	mr	r3, r4
+	addi	r4, r4, CFG_GBL_DATA_SIZE@l
 	bl	flush_dcache_range
 
-	/* restore regs */
-	mr	r3,r9
-	mr	r4,r10
-	mr	r5,r11
-#endif
+#if defined(CFG_INIT_DCACHE_CS)
+	/*
+	 * Undo the earlier data cache set-up for the primordial stack and
+	 * data area. First, invalidate the data cache and then disable data
+	 * cacheability for that area. Finally, restore the EBC values, if
+	 * any.
+	 */
+
+	/* Invalidate the primordial stack and data area in cache */
+	lis	r3, CFG_INIT_RAM_ADDR@h
+	ori	r3, r3, CFG_INIT_RAM_ADDR@l
+
+	lis	r4, CFG_INIT_RAM_END@h
+	ori	r4, r4, CFG_INIT_RAM_END@l
+	add	r4, r4, r3
+
+	bl	invalidate_dcache_range
+
+	/* Disable cacheability for the region */
+	mfdccr	r3
+	lis     r4, ~PPC_128MB_SACR_VALUE(CFG_INIT_RAM_ADDR)@h
+	ori     r4, r4, ~PPC_128MB_SACR_VALUE(CFG_INIT_RAM_ADDR)@l
+	and     r3, r3, r4
+	mtdccr  r3
+
+	/* Restore the EBC parameters */
+	li	r3, PBxAP
+	mtdcr	ebccfga, r3
+	lis	r3, PBxAP_VAL@h
+	ori	r3, r3, PBxAP_VAL@l
+	mtdcr	ebccfgd, r3
+
+	li	r3, PBxCR
+	mtdcr	ebccfga, r3
+	lis	r3, PBxCR_VAL@h
+	ori	r3, r3, PBxCR_VAL@l
+	mtdcr	ebccfgd, r3
+#endif /* defined(CFG_INIT_DCACHE_CS) */
+
+	/* Restore registers */
+	mr	r3, r9
+	mr	r4, r10
+	mr	r5, r11
+#endif /* defined(CONFIG_4xx_DCACHE) || defined(CFG_INIT_DCACHE_CS) */
 
 #ifdef CFG_INIT_RAM_DCACHE
 	/*
@@ -1396,13 +1552,13 @@
 	addi	r1,r0,CFG_TLB_FOR_BOOT_FLASH	/* Use defined TLB */
 #else
 	addi	r1,r0,0x0000		/* Default TLB entry is #0 */
-#endif
+#endif /* CFG_TLB_FOR_BOOT_FLASH */
 	tlbre	r0,r1,0x0002		/* Read contents */
 	ori	r0,r0,0x0c00		/* Or in the inhibit, write through bit */
 	tlbwe	r0,r1,0x0002		/* Save it out */
 	sync
 	isync
-#endif
+#endif /* defined(CONFIG_440EP) || ... || defined(CONFIG_460GT) */
 	mr	r1,  r3		/* Set new stack pointer		*/
 	mr	r9,  r4		/* Save copy of Init Data pointer	*/
 	mr	r10, r5		/* Save copy of Destination Address	*/
@@ -1425,7 +1581,7 @@
 
 	/* First our own GOT */
 	add	r14, r14, r15
-	/* the the one used by the C code */
+	/* then the one used by the C code */
 	add	r30, r30, r15
 
 	/*
diff --git a/cpu/ppc4xx/traps.c b/cpu/ppc4xx/traps.c
index 38b6f89..8b7e32a 100644
--- a/cpu/ppc4xx/traps.c
+++ b/cpu/ppc4xx/traps.c
@@ -170,7 +170,7 @@
 
 	val = get_esr();
 
-#if !defined(CONFIG_440)
+#if !defined(CONFIG_440) && !defined(CONFIG_405EX)
 	if (val& ESR_IMCP) {
 		printf("Instruction");
 		mtspr(ESR, val & ~ESR_IMCP);
@@ -179,7 +179,7 @@
 	}
 	printf(" machine check.\n");
 
-#elif defined(CONFIG_440)
+#elif defined(CONFIG_440) || defined(CONFIG_405EX)
 	if (val& ESR_IMCP){
 		printf("Instruction Synchronous Machine Check exception\n");
 		mtspr(SPRN_ESR, val & ~ESR_IMCP);
@@ -187,10 +187,15 @@
 		val = mfspr(MCSR);
 		if (val & MCSR_IB)
 			printf("Instruction Read PLB Error\n");
+#if defined(CONFIG_440)
 		if (val & MCSR_DRB)
 			printf("Data Read PLB Error\n");
 		if (val & MCSR_DWB)
 			printf("Data Write PLB Error\n");
+#else
+		if (val & MCSR_DB)
+			printf("Data PLB Error\n");
+#endif
 		if (val & MCSR_TLBP)
 			printf("TLB Parity Error\n");
 		if (val & MCSR_ICP){