ColdFire: Implement SBF feature for M5445EVB

Signed-off-by: TsiChung Liew <Tsi-Chung.Liew@freescale.com>

7 files changed, 538 insertions, 45 deletions

diff --git a/Makefile b/Makefile
index d802b03d0..7d8b2ba11 100644
--- a/Makefile
+++ b/Makefile
@@ -1913,7 +1913,8 @@ M54455EVB_intel_config \
 M54455EVB_a33_config \
 M54455EVB_a66_config \
 M54455EVB_i33_config \
-M54455EVB_i66_config :	unconfig
+M54455EVB_i66_config \
+M54455EVB_stm33_config :	unconfig
 	@case "$@" in \
 	M54455EVB_config)		FLASH=ATMEL; FREQ=33333333;; \
 	M54455EVB_atmel_config)		FLASH=ATMEL; FREQ=33333333;; \
@@ -1922,18 +1923,27 @@ M54455EVB_i66_config :	unconfig
 	M54455EVB_a66_config)		FLASH=ATMEL; FREQ=66666666;; \
 	M54455EVB_i33_config)		FLASH=INTEL; FREQ=33333333;; \
 	M54455EVB_i66_config)		FLASH=INTEL; FREQ=66666666;; \
+	M54455EVB_stm33_config)		FLASH=STMICRO; FREQ=33333333;; \
 	esac; \
 	if [ "$${FLASH}" = "INTEL" ] ; then \
-		echo "#undef CFG_ATMEL_BOOT" >> $(obj)include/config.h ; \
+		echo "#define CFG_INTEL_BOOT" >> $(obj)include/config.h ; \
 		echo "TEXT_BASE = 0x00000000" > $(obj)board/freescale/m54455evb/config.tmp ; \
 		cp $(obj)board/freescale/m54455evb/u-boot.int $(obj)board/freescale/m54455evb/u-boot.lds ; \
 		$(XECHO) "... with INTEL boot..." ; \
-	else \
+	fi; \
+	if [ "$${FLASH}" = "ATMEL" ] ; then \
 		echo "#define CFG_ATMEL_BOOT"	>> $(obj)include/config.h ; \
 		echo "TEXT_BASE = 0x04000000" > $(obj)board/freescale/m54455evb/config.tmp ; \
 		cp $(obj)board/freescale/m54455evb/u-boot.atm $(obj)board/freescale/m54455evb/u-boot.lds ; \
 		$(XECHO) "... with ATMEL boot..." ; \
 	fi; \
+	if [ "$${FLASH}" = "STMICRO" ] ; then \
+		echo "#define CONFIG_CF_SBF"	>> $(obj)include/config.h ; \
+		echo "#define CFG_STMICRO_BOOT"	>> $(obj)include/config.h ; \
+		echo "TEXT_BASE = 0x4FE00000" > $(obj)board/freescale/m54455evb/config.tmp ; \
+		cp $(obj)board/freescale/m54455evb/u-boot.stm $(obj)board/freescale/m54455evb/u-boot.lds ; \
+		$(XECHO) "... with ST Micro boot..." ; \
+	fi; \
 	echo "#define CFG_INPUT_CLKSRC $${FREQ}" >> $(obj)include/config.h ; \
 	$(XECHO) "... with $${FREQ}Hz input clock"
 	@$(MKCONFIG) -a M54455EVB m68k mcf5445x m54455evb freescale
diff --git a/board/freescale/m54455evb/m54455evb.c b/board/freescale/m54455evb/m54455evb.c
index 3c7b350aa..4f02121a5 100644
--- a/board/freescale/m54455evb/m54455evb.c
+++ b/board/freescale/m54455evb/m54455evb.c
@@ -39,9 +39,17 @@ int checkboard(void)
 
 phys_size_t initdram(int board_type)
 {
+	u32 dramsize;
+#ifdef CONFIG_CF_SBF
+	/*
+	 * Serial Boot: The dram is already initialized in start.S
+	 * only require to return DRAM size
+	 */
+	dramsize = CFG_SDRAM_SIZE * 0x100000 >> 1;
+#else
 	volatile sdramc_t *sdram = (volatile sdramc_t *)(MMAP_SDRAM);
 	volatile gpio_t *gpio = (volatile gpio_t *)(MMAP_GPIO);
-	u32 dramsize, i;
+	u32 i;
 
 	dramsize = CFG_SDRAM_SIZE * 0x100000 >> 1;
 
@@ -51,7 +59,7 @@ phys_size_t initdram(int board_type)
 	}
 	i--;
 
-	gpio->mscr_sdram = 0xAA;
+	gpio->mscr_sdram = CFG_SDRAM_DRV_STRENGTH;
 
 	sdram->sdcs0 = (CFG_SDRAM_BASE | i);
 	sdram->sdcs1 = (CFG_SDRAM_BASE1 | i);
@@ -80,7 +88,7 @@ phys_size_t initdram(int board_type)
 	sdram->sdcr = (CFG_SDRAM_CTRL & ~0x80000000) | 0x10000c00;
 
 	udelay(100);
-
+#endif
 	return (dramsize << 1);
 };
 
diff --git a/board/freescale/m54455evb/u-boot.stm b/board/freescale/m54455evb/u-boot.stm
new file mode 100644
index 000000000..3dd9a6b04
--- /dev/null
+++ b/board/freescale/m54455evb/u-boot.stm
@@ -0,0 +1,136 @@
+/*
+ * (C) Copyright 2000
+ * Wolfgang Denk, DENX Software Engineering, wd@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(m68k)
+/* Do we need any of these for elf?
+   __DYNAMIC = 0;    */
+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/mcf5445x/start.o		(.text)
+
+    *(.text)
+    *(.fixup)
+    *(.got1)
+  }
+  _etext = .;
+  PROVIDE (etext = .);
+  .rodata    :
+  {
+    *(.rodata)
+    *(.rodata1)
+  }
+  .fini      : { *(.fini)    } =0
+  .ctors     : { *(.ctors)   }
+  .dtors     : { *(.dtors)   }
+
+  /* Read-write section, merged into data segment: */
+  . = (. + 0x00FF) & 0xFFFFFF00;
+  _erotext = .;
+  PROVIDE (erotext = .);
+
+  .reloc   :
+  {
+    __got_start = .;
+    *(.got)
+    __got_end = .;
+    _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       :
+  {
+   _sbss = .;
+   *(.sbss) *(.scommon)
+   *(.dynbss)
+   *(.bss)
+   *(COMMON)
+   . = ALIGN(4);
+   _ebss = .;
+  }
+  _end = . ;
+  PROVIDE (end = .);
+}
diff --git a/cpu/mcf5445x/cpu_init.c b/cpu/mcf5445x/cpu_init.c
index e07748bd8..51a9e9037 100644
--- a/cpu/mcf5445x/cpu_init.c
+++ b/cpu/mcf5445x/cpu_init.c
@@ -61,11 +61,13 @@ void cpu_init_f(void)
 	    GPIO_PAR_FBCTL_OE | GPIO_PAR_FBCTL_TA_TA | GPIO_PAR_FBCTL_RW_RW |
 	    GPIO_PAR_FBCTL_TS_TS;
 
+#if !defined(CONFIG_CF_SBF)
 #if (defined(CFG_CS0_BASE) && defined(CFG_CS0_MASK) && defined(CFG_CS0_CTRL))
 	fbcs->csar0 = CFG_CS0_BASE;
 	fbcs->cscr0 = CFG_CS0_CTRL;
 	fbcs->csmr0 = CFG_CS0_MASK;
 #endif
+#endif
 
 #if (defined(CFG_CS1_BASE) && defined(CFG_CS1_MASK) && defined(CFG_CS1_CTRL))
 	/* Latch chipselect */
diff --git a/cpu/mcf5445x/speed.c b/cpu/mcf5445x/speed.c
index 967becfdd..f677f3ced 100644
--- a/cpu/mcf5445x/speed.c
+++ b/cpu/mcf5445x/speed.c
@@ -84,26 +84,29 @@ void clock_exit_limp(void)
  */
 int get_clocks(void)
 {
+
 	volatile ccm_t *ccm = (volatile ccm_t *)MMAP_CCM;
 	volatile pll_t *pll = (volatile pll_t *)MMAP_PLL;
-	volatile u8 *cpld = (volatile u8 *)(CFG_CS2_BASE + 3);
-	volatile u8 *fpga = (volatile u8 *)(CFG_CS3_BASE + 14);
 	int pllmult_nopci[] = { 20, 10, 24, 18, 12, 6, 16, 8 };
 	int pllmult_pci[] = { 12, 6, 16, 8 };
-	int vco, bPci, temp, fbtemp, pcrvalue;
+	int vco = 0, bPci, temp, fbtemp, pcrvalue;
 	int *pPllmult = NULL;
 	u16 fbpll_mask;
-	u8 cpldmode;
+
+#ifdef CONFIG_M54455EVB
+	volatile u8 *cpld = (volatile u8 *)(CFG_CS2_BASE + 3);
+#endif
+	u8 bootmode;
 
 	/* To determine PCI is present or not */
 	if (((ccm->ccr & CCM_CCR_360_FBCONFIG_MASK) == 0x00e0) ||
 	    ((ccm->ccr & CCM_CCR_360_FBCONFIG_MASK) == 0x0060)) {
 		pPllmult = &pllmult_pci[0];
-		fbpll_mask = 3;
+		fbpll_mask = 3;		/* 11b */
 		bPci = 1;
 	} else {
 		pPllmult = &pllmult_nopci[0];
-		fbpll_mask = 7;
+		fbpll_mask = 7;		/* 111b */
 #ifdef CONFIG_PCI
 		gd->pci_clk = 0;
 #endif
@@ -111,20 +114,36 @@ int get_clocks(void)
 	}
 
 #ifdef CONFIG_M54455EVB
-	/* Temporary place here, belongs in board/freescale/... */
-	/* Temporary read from CCR- fixed fb issue, must be the same clock
-	   as pci or input clock, causing cpld/fpga read inconsistancy */
-	fbtemp = pPllmult[ccm->ccr & fbpll_mask];
+	bootmode = (*cpld & 0x03);
 
-	/* Break down into small pieces, code still in flex bus */
-	pcrvalue = pll->pcr & 0xFFFFF0FF;
-	temp = fbtemp - 1;
-	pcrvalue |= PLL_PCR_OUTDIV3(temp);
+	if (bootmode != 3) {
+		/* Temporary read from CCR- fixed fb issue, must be the same clock
+		   as pci or input clock, causing cpld/fpga read inconsistancy */
+		fbtemp = pPllmult[ccm->ccr & fbpll_mask];
 
+		/* Break down into small pieces, code still in flex bus */
+		pcrvalue = pll->pcr & 0xFFFFF0FF;
+		temp = fbtemp - 1;
+		pcrvalue |= PLL_PCR_OUTDIV3(temp);
+
+		pll->pcr = pcrvalue;
+	}
+#endif
+#ifdef CONFIG_M54451EVB
+	/* No external logic to read the bootmode, hard coded from built */
+#ifdef CONFIG_CF_SBF
+	bootmode = 3;
+#else
+	bootmode = 2;
+
+	/* default value is 16 mul, set to 20 mul */
+	pcrvalue = (pll->pcr & 0x00FFFFFF) | 0x14000000;
 	pll->pcr = pcrvalue;
+	while ((pll->psr & PLL_PSR_LOCK) != PLL_PSR_LOCK);
+#endif
+#endif
 
-	cpldmode = *cpld & 0x03;
-	if (cpldmode == 0) {
+	if (bootmode == 0) {
 		/* RCON mode */
 		vco = pPllmult[ccm->rcon & fbpll_mask] * CFG_INPUT_CLKSRC;
 
@@ -151,14 +170,22 @@ int get_clocks(void)
 			pll->pcr = pcrvalue;
 		}
 		gd->vco_clk = vco;	/* Vco clock */
-	} else if (cpldmode == 2) {
+	} else if (bootmode == 2) {
 		/* Normal mode */
-		vco = pPllmult[ccm->ccr & fbpll_mask] * CFG_INPUT_CLKSRC;
+		vco =  ((pll->pcr & 0xFF000000) >> 24) * CFG_INPUT_CLKSRC;
+		if ((vco < CLOCK_PLL_FVCO_MIN) || (vco > CLOCK_PLL_FVCO_MAX)) {
+			/* Default value */
+			pcrvalue = (pll->pcr & 0x00FFFFFF);
+			pcrvalue |= pPllmult[ccm->ccr & fbpll_mask] << 24;
+			pll->pcr = pcrvalue;
+			vco =  ((pll->pcr & 0xFF000000) >> 24) * CFG_INPUT_CLKSRC;
+		}
 		gd->vco_clk = vco;	/* Vco clock */
-	} else if (cpldmode == 3) {
+	} else if (bootmode == 3) {
 		/* serial mode */
+		vco =  ((pll->pcr & 0xFF000000) >> 24) * CFG_INPUT_CLKSRC;
+		gd->vco_clk = vco;	/* Vco clock */
 	}
-#endif				/* CONFIG_M54455EVB */
 
 	if ((ccm->ccr & CCM_MISCCR_LIMP) == CCM_MISCCR_LIMP) {
 		/* Limp mode */
diff --git a/cpu/mcf5445x/start.S b/cpu/mcf5445x/start.S
index 89ec7bcc9..2a6019bbf 100644
--- a/cpu/mcf5445x/start.S
+++ b/cpu/mcf5445x/start.S
@@ -46,15 +46,30 @@
 	addl	#60,%sp;		/* space for 15 regs */ \
 	rte;
 
+#if defined(CONFIG_CF_SBF)
+#define ASM_DRAMINIT	(asm_dram_init - TEXT_BASE + CFG_INIT_RAM_ADDR)
+#define ASM_SBF_IMG_HDR	(asm_sbf_img_hdr - TEXT_BASE + CFG_INIT_RAM_ADDR)
+#endif
+
 .text
+
 /*
  *	Vector table. This is used for initial platform startup.
  *	These vectors are to catch any un-intended traps.
  */
 _vectors:
+#if defined(CONFIG_CF_SBF)
+
+INITSP:	.long	0		/* Initial SP	*/
+INITPC:	.long	ASM_DRAMINIT	/* Initial PC 	*/
+
+#else
+
+INITSP:		.long	0	/* Initial SP	*/
+INITPC:		.long	_START	/* Initial PC 		*/
+
+#endif
 
-INITSP:		.long	0x00000000	/* Initial SP	*/
-INITPC:		.long	_START	/* Initial PC		*/
 vector02:	.long	_FAULT	/* Access Error		*/
 vector03:	.long	_FAULT	/* Address Error	*/
 vector04:	.long	_FAULT	/* Illegal Instruction	*/
@@ -83,6 +98,8 @@ vector1D:	.long	_FAULT	/* Autovector Level 5	*/
 vector1E:	.long	_FAULT	/* Autovector Level 6	*/
 vector1F:	.long	_FAULT	/* Autovector Level 7	*/
 
+#if !defined(CONFIG_CF_SBF)
+
 /* TRAP #0 - #15 */
 vector20_2F:
 .long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
@@ -122,9 +139,237 @@ vector192_255:
 .long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
 .long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
 .long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
+#endif
 
-	.text
+#if defined(CONFIG_CF_SBF)
+	/* Image header: chksum 4 bytes, len 4 bytes, img dest 4 bytes */
+asm_sbf_img_hdr:
+	.long	0x00000000	/* checksum, not yet implemented */
+	.long	0x00030000	/* image length */
+	.long	TEXT_BASE	/* image to be relocated at */
+
+asm_dram_init:
+	move.l	#(CFG_INIT_RAM_ADDR + CFG_INIT_RAM_CTRL), %d0
+	movec	%d0, %RAMBAR1	/* init Rambar */
+	move.l	#(CFG_INIT_RAM_ADDR + CFG_INIT_SP_OFFSET), %sp
+	clr.l %sp@-
+
+	/* Must disable global address */
+	move.l	#0xFC008000, %a1
+	move.l	#(CFG_CS0_BASE), (%a1)
+	move.l	#0xFC008008, %a1
+	move.l	#(CFG_CS0_CTRL), (%a1)
+	move.l	#0xFC008004, %a1
+	move.l	#(CFG_CS0_MASK), (%a1)
+
+	/*
+	 * Dram Initialization
+	 * a1, a2, and d0
+	 */
+	/* mscr sdram */
+	move.l	#0xFC0A4074, %a1
+	move.b	#(CFG_SDRAM_DRV_STRENGTH), (%a1)
+	nop
+
+	/* SDRAM Chip 0 and 1 */
+	move.l	#0xFC0B8110, %a1
+	move.l	#0xFC0B8114, %a2
+
+	/* calculate the size */
+	move.l	#0x13, %d1
+	move.l	#(CFG_SDRAM_SIZE), %d2
+#ifdef CFG_SDRAM_BASE1
+	lsr.l	#1, %d2
+#endif
+
+dramsz_loop:
+	lsr.l	#1, %d2
+	add.l	#1, %d1
+	cmp.l	#1, %d2
+	bne	dramsz_loop
+
+	/* SDRAM Chip 0 and 1 */
+	move.l	#(CFG_SDRAM_BASE), (%a1)
+	or.l	%d1, (%a1)
+#ifdef CFG_SDRAM_BASE1
+	move.l	#(CFG_SDRAM_BASE1), (%a2)
+	or.l	%d1, (%a2)
+#endif
+	nop
+
+	/* dram cfg1 and cfg2 */
+	move.l	#0xFC0B8008, %a1
+	move.l	#(CFG_SDRAM_CFG1), (%a1)
+	nop
+	move.l	#0xFC0B800C, %a2
+	move.l	#(CFG_SDRAM_CFG2), (%a2)
+	nop
+
+	move.l	#0xFC0B8000, %a1	/* Mode */
+	move.l	#0xFC0B8004, %a2	/* Ctrl */
+
+#ifdef CONFIG_M54455EVB
+	/* Issue PALL */
+	move.l	#(CFG_SDRAM_CTRL + 2), (%a2)
+	nop
+
+	/* Issue LEMR */
+	move.l	#(CFG_SDRAM_EMOD + 0x408), (%a1)
+	nop
+	move.l	#(CFG_SDRAM_MODE + 0x300), (%a1)
+	nop
+
+	move.l	#1000, %d0
+wait1000:
+	nop
+	subq.l	#1, %d0
+	bne	wait1000
+#endif
+
+	/* Issue PALL */
+	move.l	#(CFG_SDRAM_CTRL + 2), (%a2)
+	nop
+
+	/* Perform two refresh cycles */
+	move.l	#(CFG_SDRAM_CTRL + 4), %d0
+	nop
+	move.l	%d0, (%a2)
+	move.l	%d0, (%a2)
+	nop
 
+#ifdef CONFIG_M54455EVB
+	move.l	#(CFG_SDRAM_MODE + 0x200), (%a1)
+	nop
+#elif defined(CONFIG_M54451EVB)
+	/* Issue LEMR */
+	move.l	#(CFG_SDRAM_MODE), (%a2)
+	nop
+	move.l	#(CFG_SDRAM_EMOD), (%a2)
+	nop
+#endif
+
+	move.l	#500, %d0
+wait500:
+	nop
+	subq.l	#1, %d0
+	bne	wait500
+
+	move.l	#(CFG_SDRAM_CTRL), %d0
+	and.l	#0x7FFFFFFF, %d0
+#ifdef CONFIG_M54455EVB
+	or.l	#0x10000c00, %d0
+#elif defined(CONFIG_M54451EVB)
+	or.l	#0x10000000, %d0
+#endif
+	move.l	%d0, (%a2)
+	nop
+
+	/*
+	 * DSPI Initialization
+	 * a0 - general, sram - 0x80008000 - 32, see M54455EVB.h
+	 * a1 - dspi status
+	 * a2 - dtfr
+	 * a3 - drfr
+	 * a4 - Dst addr
+	 */
+	/* Enable pins for DSPI mode - chip-selects are enabled later */
+	move.l	#0xFC0A4063, %a0
+	move.b	#0x7F, (%a0)
+
+	/* Configure DSPI module */
+	move.l	#0xFC05C000, %a0
+	move.l	#0x80FF0C00, (%a0)	/* Master, clear TX/RX FIFO */
+
+	move.l	#0xFC05C00C, %a0
+	move.l	#0x3E000011, (%a0)
+
+	move.l	#0xFC05C034, %a2	/* dtfr */
+	move.l	#0xFC05C03B, %a3	/* drfr */
+
+	move.l	#(ASM_SBF_IMG_HDR + 4), %a1
+	move.l	(%a1)+, %d5
+	move.l	(%a1), %a4
+
+	move.l	#(CFG_INIT_RAM_ADDR + CFG_SBFHDR_DATA_OFFSET), %a0
+	move.l	#(CFG_SBFHDR_SIZE), %d4
+
+	move.l	#0xFC05C02C, %a1	/* dspi status */
+
+	/* Issue commands and address */
+	move.l	#0x8002000B, %d2	/* Fast Read Cmd */
+	jsr	asm_dspi_wr_status
+	jsr	asm_dspi_rd_status
+
+	move.l	#0x80020000, %d2	/* Address byte 2 */
+	jsr	asm_dspi_wr_status
+	jsr	asm_dspi_rd_status
+
+	move.l	#0x80020000, %d2	/* Address byte 1 */
+	jsr	asm_dspi_wr_status
+	jsr	asm_dspi_rd_status
+
+	move.l	#0x80020000, %d2	/* Address byte 0 */
+	jsr	asm_dspi_wr_status
+	jsr	asm_dspi_rd_status
+
+	move.l	#0x80020000, %d2	/* Dummy Wr and Rd */
+	jsr	asm_dspi_wr_status
+	jsr	asm_dspi_rd_status
+
+	/* Transfer serial boot header to sram */
+asm_dspi_rd_loop1:
+	move.l	#0x80020000, %d2
+	jsr	asm_dspi_wr_status
+	jsr	asm_dspi_rd_status
+
+	move.b	%d1, (%a0)		/* read, copy to dst */
+
+	add.l	#1, %a0			/* inc dst by 1 */
+	sub.l	#1, %d4			/* dec cnt by 1 */
+	bne	asm_dspi_rd_loop1
+
+	/* Transfer u-boot from serial flash to memory */
+asm_dspi_rd_loop2:
+	move.l	#0x80020000, %d2
+	jsr	asm_dspi_wr_status
+	jsr	asm_dspi_rd_status
+
+	move.b	%d1, (%a4)		/* read, copy to dst */
+
+	add.l	#1, %a4			/* inc dst by 1 */
+	sub.l	#1, %d5			/* dec cnt by 1 */
+	bne	asm_dspi_rd_loop2
+
+	move.l	#0x00020000, %d2	/* Terminate */
+	jsr	asm_dspi_wr_status
+	jsr	asm_dspi_rd_status
+
+	/* jump to memory and execute */
+	move.l	#(TEXT_BASE + 0x400), %a0
+	jmp	(%a0)
+
+asm_dspi_wr_status:
+	move.l	(%a1), %d0		/* status */
+	and.l	#0x0000F000, %d0
+	cmp.l	#0x00003000, %d0
+	bgt	asm_dspi_wr_status
+
+	move.l	%d2, (%a2)
+	rts
+
+asm_dspi_rd_status:
+	move.l	(%a1), %d0		/* status */
+	and.l	#0x000000F0, %d0
+	lsr.l	#4, %d0
+	cmp.l	#0, %d0
+	beq	asm_dspi_rd_status
+
+	move.b	(%a3), %d1
+	rts
+#endif			/* CONFIG_CF_SBF */
+
+	.text
+	. = 0x400
 	.globl	_start
 _start:
 	nop
@@ -132,11 +377,16 @@ _start:
 	move.w #0x2700,%sr		/* Mask off Interrupt */
 
 	/* Set vector base register at the beginning of the Flash */
+#if defined(CONFIG_CF_SBF)
+	move.l	#TEXT_BASE, %d0
+	movec	%d0, %VBR
+#else
 	move.l	#CFG_FLASH_BASE, %d0
 	movec	%d0, %VBR
 
 	move.l	#(CFG_INIT_RAM_ADDR + CFG_INIT_RAM_CTRL), %d0
 	movec	%d0, %RAMBAR1
+#endif
 
 	/* initialize general use internal ram */
 	move.l #0, %d0
diff --git a/include/configs/M54455EVB.h b/include/configs/M54455EVB.h
index 4d17f2642..f893b232c 100644
--- a/include/configs/M54455EVB.h
+++ b/include/configs/M54455EVB.h
@@ -121,18 +121,45 @@
 #endif
 
 #define CONFIG_HOSTNAME		M54455EVB
+#ifdef CFG_STMICRO_BOOT
+/* ST Micro serial flash */
+#define	CFG_LOAD_ADDR2		0x40010013
 #define CONFIG_EXTRA_ENV_SETTINGS		\
 	"netdev=eth0\0"				\
 	"inpclk=" MK_STR(CFG_INPUT_CLKSRC) "\0"	\
-	"loadaddr=40010000\0"			\
-	"u-boot=u-boot.bin\0"			\
-	"load=tftp ${loadaddr) ${u-boot}\0"	\
+	"loadaddr=0x40010000\0"			\
+	"sbfhdr=sbfhdr.bin\0"			\
+	"uboot=u-boot.bin\0"			\
+	"load=tftp ${loadaddr} ${sbfhdr};"	\
+	"tftp " MK_STR(CFG_LOAD_ADDR2) " ${uboot} \0"	\
 	"upd=run load; run prog\0"		\
-	"prog=prot off 4000000 402ffff;"		\
-	"era 4000000 402ffff;"				\
-	"cp.b ${loadaddr} 0 ${filesize};"	\
+	"prog=sf probe 0:1 10000 1;"		\
+	"sf erase 0 30000;"			\
+	"sf write ${loadaddr} 0 0x30000;"	\
 	"save\0"				\
 	""
+#else
+/* Atmel and Intel */
+#ifdef CFG_ATMEL_BOOT
+#	define CFG_UBOOT_END	0x0403FFFF
+#elif defined(CFG_INTEL_BOOT)
+#	define CFG_UBOOT_END	0x3FFFF
+#endif
+#define CONFIG_EXTRA_ENV_SETTINGS		\
+	"netdev=eth0\0"				\
+	"inpclk=" MK_STR(CFG_INPUT_CLKSRC) "\0"	\
+	"loadaddr=0x40010000\0"			\
+	"uboot=u-boot.bin\0"			\
+	"load=tftp ${loadaddr} ${uboot}\0"	\
+	"upd=run load; run prog\0"		\
+	"prog=prot off " MK_STR(CFG_FLASH_BASE)	\
+	" " MK_STR(CFG_UBOOT_END) ";"		\
+	"era " MK_STR(CFG_FLASH_BASE) " "	\
+	MK_STR(CFG_UBOOT_END) ";"		\
+	"cp.b ${loadaddr} " MK_STR(CFG_FLASH_BASE)\
+	" ${filesize}; save\0"			\
+	""
+#endif
 
 /* ATA configuration */
 #define CONFIG_ISO_PARTITION
@@ -175,6 +202,8 @@
 /* DSPI and Serial Flash */
 #define CONFIG_CF_DSPI
 #define CONFIG_HARD_SPI
+#define CFG_SER_FLASH_BASE	0x01000000
+#define CFG_SBFHDR_SIZE		0x13
 #ifdef CONFIG_CMD_SPI
 #	define CFG_DSPI_DCTAR0		(DSPI_DCTAR_TRSZ(7) | \
 					 DSPI_DCTAR_CPOL | \
@@ -221,7 +250,7 @@
 /* Input, PCI, Flexbus, and VCO */
 #define CONFIG_EXTRA_CLOCK
 
-#define CONFIG_PRAM		512	/* 512 KB */
+#define CONFIG_PRAM		2048	/* 2048 KB */
 
 #define CFG_PROMPT		"-> "
 #define CFG_LONGHELP		/* undef to save memory */
@@ -254,8 +283,9 @@
 #define CFG_INIT_RAM_END	0x8000	/* End of used area in internal SRAM */
 #define CFG_INIT_RAM_CTRL	0x221
 #define CFG_GBL_DATA_SIZE	128	/* size in bytes reserved for initial data */
-#define CFG_GBL_DATA_OFFSET	((CFG_INIT_RAM_END - CFG_GBL_DATA_SIZE) - 16)
+#define CFG_GBL_DATA_OFFSET	((CFG_INIT_RAM_END - CFG_GBL_DATA_SIZE) - 32)
 #define CFG_INIT_SP_OFFSET	CFG_GBL_DATA_OFFSET
+#define CFG_SBFHDR_DATA_OFFSET	(CFG_INIT_RAM_END - 32)
 
 /*-----------------------------------------------------------------------
  * Start addresses for the final memory configuration
@@ -270,11 +300,16 @@
 #define CFG_SDRAM_CTRL		0xEA0B2000
 #define CFG_SDRAM_EMOD		0x40010000
 #define CFG_SDRAM_MODE		0x00010033
+#define CFG_SDRAM_DRV_STRENGTH	0xAA
 
 #define CFG_MEMTEST_START	CFG_SDRAM_BASE + 0x400
 #define CFG_MEMTEST_END		((CFG_SDRAM_SIZE - 3) << 20)
 
-#define CFG_MONITOR_BASE	(CFG_FLASH_BASE + 0x400)
+#ifdef CONFIG_CF_SBF
+#	define CFG_MONITOR_BASE	(TEXT_BASE + 0x400)
+#else
+#	define CFG_MONITOR_BASE	(CFG_FLASH_BASE + 0x400)
+#endif
 #define CFG_BOOTPARAMS_LEN	64*1024
 #define CFG_MONITOR_LEN		(256 << 10)	/* Reserve 256 kB for Monitor */
 #define CFG_MALLOC_LEN		(128 << 10)	/* Reserve 128 kB for malloc() */
@@ -287,27 +322,44 @@
 /* Initial Memory map for Linux */
 #define CFG_BOOTMAPSZ		(CFG_SDRAM_BASE + (CFG_SDRAM_SIZE << 20))
 
-/* Configuration for environment
+/*
+ * Configuration for environment
  * Environment is embedded in u-boot in the second sector of the flash
  */
-#define CFG_ENV_IS_IN_FLASH	1
-#define CONFIG_ENV_OVERWRITE	1
+#ifdef CONFIG_CF_SBF
+#	define CFG_ENV_IS_IN_SPI_FLASH
+#	define CFG_ENV_SPI_CS		1
+#else
+#	define CFG_ENV_IS_IN_FLASH	1
+#endif
+#undef CONFIG_ENV_OVERWRITE
 #undef CFG_ENV_IS_EMBEDDED
 
 /*-----------------------------------------------------------------------
  * FLASH organization
  */
+#ifdef CFG_STMICRO_BOOT
+#	define CFG_FLASH_BASE		CFG_SER_FLASH_BASE
+#	define CFG_FLASH0_BASE		CFG_SER_FLASH_BASE
+#	define CFG_FLASH1_BASE		CFG_CS0_BASE
+#	define CFG_FLASH2_BASE		CFG_CS1_BASE
+#	define CFG_ENV_OFFSET		0x30000
+#	define CFG_ENV_SIZE		0x2000
+#	define CFG_ENV_SECT_SIZE	0x10000
+#endif
 #ifdef CFG_ATMEL_BOOT
 #	define CFG_FLASH_BASE		CFG_CS0_BASE
 #	define CFG_FLASH0_BASE		CFG_CS0_BASE
 #	define CFG_FLASH1_BASE		CFG_CS1_BASE
 #	define CFG_ENV_ADDR		(CFG_FLASH_BASE + 0x4000)
 #	define CFG_ENV_SECT_SIZE	0x2000
-#else
+#endif
+#ifdef CFG_INTEL_BOOT
 #	define CFG_FLASH_BASE		CFG_CS0_BASE
 #	define CFG_FLASH0_BASE		CFG_CS0_BASE
 #	define CFG_FLASH1_BASE		CFG_CS1_BASE
-#	define CFG_ENV_ADDR		(CFG_FLASH_BASE + 0x60000)
+#	define CFG_ENV_ADDR		(CFG_FLASH_BASE + 0x40000)
+#	define CFG_ENV_SIZE		0x2000
 #	define CFG_ENV_SECT_SIZE	0x20000
 #endif
 
@@ -339,15 +391,23 @@
  * This is setting for JFFS2 support in u-boot.
  * NOTE: Enable CONFIG_CMD_JFFS2 for JFFS2 support.
  */
+#ifdef CONFIG_CMD_JFFS2
+#ifdef CF_STMICRO_BOOT
+#	define CONFIG_JFFS2_DEV		"nor1"
+#	define CONFIG_JFFS2_PART_SIZE	0x01000000
+#	define CONFIG_JFFS2_PART_OFFSET	(CFG_FLASH2_BASE + 0x500000)
+#endif
 #ifdef CFG_ATMEL_BOOT
 #	define CONFIG_JFFS2_DEV		"nor1"
 #	define CONFIG_JFFS2_PART_SIZE	0x01000000
 #	define CONFIG_JFFS2_PART_OFFSET	(CFG_FLASH1_BASE + 0x500000)
-#else
+#endif
+#ifdef CFG_INTEL_BOOT
 #	define CONFIG_JFFS2_DEV		"nor0"
 #	define CONFIG_JFFS2_PART_SIZE	(0x01000000 - 0x500000)
 #	define CONFIG_JFFS2_PART_OFFSET	(CFG_FLASH0_BASE + 0x500000)
 #endif
+#endif
 
 /*-----------------------------------------------------------------------
  * Cache Configuration
@@ -366,7 +426,7 @@
  * CS5 - Available
  */
 
-#ifdef CFG_ATMEL_BOOT
+#if defined(CFG_ATMEL_BOOT) || defined(CFG_STMICRO_BOOT)
  /* Atmel Flash */
 #define CFG_CS0_BASE		0x04000000
 #define CFG_CS0_MASK		0x00070001