init commit via android 4.4 uboot

6 files changed, 1025 insertions, 0 deletions

diff --git a/board/cerf250/Makefile b/board/cerf250/Makefile
new file mode 100755
index 0000000..83e3ba4
--- /dev/null
+++ b/board/cerf250/Makefile
@@ -0,0 +1,47 @@
+#
+# (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
+#
+
+include $(TOPDIR)/config.mk
+
+LIB	= lib$(BOARD).a
+
+OBJS	:= cerf250.o flash.o
+SOBJS	:= lowlevel_init.o
+
+$(LIB):	$(OBJS) $(SOBJS)
+	$(AR) crv $@ $(OBJS) $(SOBJS)
+
+clean:
+	rm -f $(SOBJS) $(OBJS)
+
+distclean:	clean
+	rm -f $(LIB) core *.bak .depend
+
+#########################################################################
+
+.depend:	Makefile $(SOBJS:.o=.S) $(OBJS:.o=.c)
+		$(CC) -M $(CPPFLAGS) $(SOBJS:.o=.S) $(OBJS:.o=.c) > $@
+
+-include .depend
+
+#########################################################################
diff --git a/board/cerf250/cerf250.c b/board/cerf250/cerf250.c
new file mode 100755
index 0000000..cc1bc16
--- /dev/null
+++ b/board/cerf250/cerf250.c
@@ -0,0 +1,75 @@
+/*
+ * (C) Copyright 2002
+ * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
+ *
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Marius Groeger <mgroeger@sysgo.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>
+
+/* ------------------------------------------------------------------------- */
+
+
+/*
+ * Miscelaneous platform dependent initialisations
+ */
+
+int board_init (void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	/* memory and cpu-speed are setup before relocation */
+	/* so we do _nothing_ here */
+
+	/* arch number of cerf PXA Board */
+	gd->bd->bi_arch_number = MACH_TYPE_PXA_CERF;
+
+	/* adress of boot parameters */
+	gd->bd->bi_boot_params = 0xa0000100;
+
+	return 0;
+}
+
+int board_late_init(void)
+{
+	setenv("stdout", "serial");
+	setenv("stderr", "serial");
+	return 0;
+}
+
+
+int dram_init (void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
+	gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
+	gd->bd->bi_dram[1].start = PHYS_SDRAM_2;
+	gd->bd->bi_dram[1].size = PHYS_SDRAM_2_SIZE;
+	gd->bd->bi_dram[2].start = PHYS_SDRAM_3;
+	gd->bd->bi_dram[2].size = PHYS_SDRAM_3_SIZE;
+	gd->bd->bi_dram[3].start = PHYS_SDRAM_4;
+	gd->bd->bi_dram[3].size = PHYS_SDRAM_4_SIZE;
+
+	return 0;
+}
diff --git a/board/cerf250/config.mk b/board/cerf250/config.mk
new file mode 100755
index 0000000..1a86cc9
--- /dev/null
+++ b/board/cerf250/config.mk
@@ -0,0 +1,5 @@
+#
+# Cerf board with PXA250 cpu
+#
+#
+TEXT_BASE = 0xa3080000
diff --git a/board/cerf250/flash.c b/board/cerf250/flash.c
new file mode 100755
index 0000000..ba82892
--- /dev/null
+++ b/board/cerf250/flash.c
@@ -0,0 +1,431 @@
+/*
+ * (C) Copyright 2001
+ * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
+ *
+ * (C) Copyright 2001
+ * 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
+ */
+
+#include <common.h>
+#include <linux/byteorder/swab.h>
+
+
+flash_info_t flash_info[CFG_MAX_FLASH_BANKS];	/* info for FLASH chips    */
+
+/* Board support for 1 or 2 flash devices */
+#define FLASH_PORT_WIDTH32
+#undef FLASH_PORT_WIDTH16
+
+#ifdef FLASH_PORT_WIDTH16
+#define FLASH_PORT_WIDTH		ushort
+#define FLASH_PORT_WIDTHV		vu_short
+#define SWAP(x)               __swab16(x)
+#else
+#define FLASH_PORT_WIDTH		ulong
+#define FLASH_PORT_WIDTHV		vu_long
+#define SWAP(x)               __swab32(x)
+#endif
+
+#define FPW	   FLASH_PORT_WIDTH
+#define FPWV   FLASH_PORT_WIDTHV
+
+#define mb() __asm__ __volatile__ ("" : : : "memory")
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+static ulong flash_get_size (FPW *addr, flash_info_t *info);
+static int write_data (flash_info_t *info, ulong dest, FPW data);
+static void flash_get_offsets (ulong base, flash_info_t *info);
+void inline spin_wheel (void);
+
+/*-----------------------------------------------------------------------
+ */
+
+unsigned long flash_init (void)
+{
+	int i;
+	ulong size = 0;
+
+	for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
+		switch (i) {
+		case 0:
+			flash_get_size ((FPW *) PHYS_FLASH_1, &flash_info[i]);
+			flash_get_offsets (PHYS_FLASH_1, &flash_info[i]);
+			break;
+		case 1:
+			flash_get_size ((FPW *) PHYS_FLASH_2, &flash_info[i]);
+			flash_get_offsets (PHYS_FLASH_2, &flash_info[i]);
+			break;
+		default:
+			panic ("configured too many flash banks!\n");
+			break;
+		}
+		size += flash_info[i].size;
+	}
+
+	/* Protect monitor and environment sectors
+	 */
+	flash_protect ( FLAG_PROTECT_SET,
+			CFG_FLASH_BASE,
+			CFG_FLASH_BASE + monitor_flash_len - 1,
+			&flash_info[0] );
+
+	flash_protect ( FLAG_PROTECT_SET,
+			CFG_ENV_ADDR,
+			CFG_ENV_ADDR + CFG_ENV_SIZE - 1, &flash_info[0] );
+
+	return size;
+}
+
+/*-----------------------------------------------------------------------
+ */
+static void flash_get_offsets (ulong base, flash_info_t *info)
+{
+	int i;
+
+	if (info->flash_id == FLASH_UNKNOWN) {
+		return;
+	}
+
+	if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {
+		for (i = 0; i < info->sector_count; i++) {
+			info->start[i] = base + (i * PHYS_FLASH_SECT_SIZE);
+			info->protect[i] = 0;
+		}
+	}
+}
+
+/*-----------------------------------------------------------------------
+ */
+void flash_print_info (flash_info_t *info)
+{
+	int i;
+
+	if (info->flash_id == FLASH_UNKNOWN) {
+		printf ("missing or unknown FLASH type\n");
+		return;
+	}
+
+	switch (info->flash_id & FLASH_VENDMASK) {
+	case FLASH_MAN_INTEL:
+		printf ("INTEL ");
+		break;
+	default:
+		printf ("Unknown Vendor ");
+		break;
+	}
+
+	switch (info->flash_id & FLASH_TYPEMASK) {
+	case FLASH_28F128J3A:
+		printf ("28F128J3A\n");
+		break;
+	default:
+		printf ("Unknown Chip Type\n");
+		break;
+	}
+
+	printf ("  Size: %ld MB in %d Sectors\n",
+			info->size >> 20, info->sector_count);
+
+	printf ("  Sector Start Addresses:");
+	for (i = 0; i < info->sector_count; ++i) {
+		if ((i % 5) == 0)
+			printf ("\n   ");
+		printf (" %08lX%s",
+			info->start[i],
+			info->protect[i] ? " (RO)" : "     ");
+	}
+	printf ("\n");
+	return;
+}
+
+/*
+ * The following code cannot be run from FLASH!
+ */
+static ulong flash_get_size (FPW *addr, flash_info_t *info)
+{
+	volatile FPW value;
+
+	/* Write auto select command: read Manufacturer ID */
+	addr[0x5555] = (FPW) 0x00AA00AA;
+	addr[0x2AAA] = (FPW) 0x00550055;
+	addr[0x5555] = (FPW) 0x00900090;
+
+	mb ();
+	value = addr[0];
+
+	switch (value) {
+
+	case (FPW) INTEL_MANUFACT:
+		info->flash_id = FLASH_MAN_INTEL;
+		break;
+
+	default:
+		info->flash_id = FLASH_UNKNOWN;
+		info->sector_count = 0;
+		info->size = 0;
+		addr[0] = (FPW) 0x00FF00FF;	/* restore read mode */
+		return (0);			/* no or unknown flash  */
+	}
+
+	mb ();
+	value = addr[1];			/* device ID        */
+
+	switch (value) {
+
+	case (FPW) INTEL_ID_28F128J3A:
+		info->flash_id += FLASH_28F128J3A;
+		info->sector_count = 128;
+		info->size = 0x02000000;
+		break;				/* => 16 MB     */
+
+	default:
+		info->flash_id = FLASH_UNKNOWN;
+		break;
+	}
+
+	if (info->sector_count > CFG_MAX_FLASH_SECT) {
+		printf ("** ERROR: sector count %d > max (%d) **\n",
+			info->sector_count, CFG_MAX_FLASH_SECT);
+		info->sector_count = CFG_MAX_FLASH_SECT;
+	}
+
+	addr[0] = (FPW) 0x00FF00FF;		/* restore read mode */
+
+	return (info->size);
+}
+
+
+/*-----------------------------------------------------------------------
+ */
+
+int flash_erase (flash_info_t *info, int s_first, int s_last)
+{
+	int flag, prot, sect;
+	ulong type, start, last;
+	int rcode = 0;
+
+	if ((s_first < 0) || (s_first > s_last)) {
+		if (info->flash_id == FLASH_UNKNOWN) {
+			printf ("- missing\n");
+		} else {
+			printf ("- no sectors to erase\n");
+		}
+		return 1;
+	}
+
+	type = (info->flash_id & FLASH_VENDMASK);
+	if ((type != FLASH_MAN_INTEL)) {
+		printf ("Can't erase unknown flash type %08lx - aborted\n",
+			info->flash_id);
+		return 1;
+	}
+
+	prot = 0;
+	for (sect = s_first; sect <= s_last; ++sect) {
+		if (info->protect[sect]) {
+			prot++;
+		}
+	}
+
+	if (prot) {
+		printf ("- Warning: %d protected sectors will not be erased!\n",
+			prot);
+	} else {
+		printf ("\n");
+	}
+
+	start = get_timer (0);
+	last = start;
+
+	/* Disable interrupts which might cause a timeout here */
+	flag = disable_interrupts ();
+
+	/* Start erase on unprotected sectors */
+	for (sect = s_first; sect <= s_last; sect++) {
+		if (info->protect[sect] == 0) {	/* not protected */
+			FPWV *addr = (FPWV *) (info->start[sect]);
+			FPW status;
+
+			printf ("Erasing sector %2d ... ", sect);
+
+			/* arm simple, non interrupt dependent timer */
+			reset_timer_masked ();
+
+			*addr = (FPW) 0x00500050;	/* clear status register */
+			*addr = (FPW) 0x00200020;	/* erase setup */
+			*addr = (FPW) 0x00D000D0;	/* erase confirm */
+
+			while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
+				if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {
+					printf ("Timeout\n");
+					*addr = (FPW) 0x00B000B0;	/* suspend erase     */
+					*addr = (FPW) 0x00FF00FF;	/* reset to read mode */
+					rcode = 1;
+					break;
+				}
+			}
+
+			*addr = 0x00500050;	/* clear status register cmd.   */
+			*addr = 0x00FF00FF;	/* resest to read mode          */
+
+			printf (" done\n");
+		}
+	}
+	return rcode;
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ * 4 - Flash not identified
+ */
+
+int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
+{
+	ulong cp, wp;
+	FPW data;
+	int count, i, l, rc, port_width;
+
+	if (info->flash_id == FLASH_UNKNOWN) {
+		return 4;
+	}
+/* get lower word aligned address */
+#ifdef FLASH_PORT_WIDTH16
+	wp = (addr & ~1);
+	port_width = 2;
+#else
+	wp = (addr & ~3);
+	port_width = 4;
+#endif
+
+	/*
+	 * handle unaligned start bytes
+	 */
+	if ((l = addr - wp) != 0) {
+		data = 0;
+		for (i = 0, cp = wp; i < l; ++i, ++cp) {
+			data = (data << 8) | (*(uchar *) cp);
+		}
+		for (; i < port_width && cnt > 0; ++i) {
+			data = (data << 8) | *src++;
+			--cnt;
+			++cp;
+		}
+		for (; cnt == 0 && i < port_width; ++i, ++cp) {
+			data = (data << 8) | (*(uchar *) cp);
+		}
+
+		if ((rc = write_data (info, wp, SWAP (data))) != 0) {
+			return (rc);
+		}
+		wp += port_width;
+	}
+
+	/*
+	 * handle word aligned part
+	 */
+	count = 0;
+	while (cnt >= port_width) {
+		data = 0;
+		for (i = 0; i < port_width; ++i) {
+			data = (data << 8) | *src++;
+		}
+		if ((rc = write_data (info, wp, SWAP (data))) != 0) {
+			return (rc);
+		}
+		wp += port_width;
+		cnt -= port_width;
+		if (count++ > 0x800) {
+			spin_wheel ();
+			count = 0;
+		}
+	}
+
+	if (cnt == 0) {
+		return (0);
+	}
+
+	/*
+	 * handle unaligned tail bytes
+	 */
+	data = 0;
+	for (i = 0, cp = wp; i < port_width && cnt > 0; ++i, ++cp) {
+		data = (data << 8) | *src++;
+		--cnt;
+	}
+	for (; i < port_width; ++i, ++cp) {
+		data = (data << 8) | (*(uchar *) cp);
+	}
+
+	return (write_data (info, wp, SWAP (data)));
+}
+
+/*-----------------------------------------------------------------------
+ * Write a word or halfword to Flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+static int write_data (flash_info_t *info, ulong dest, FPW data)
+{
+	FPWV *addr = (FPWV *) dest;
+	ulong status;
+	int flag;
+
+	/* Check if Flash is (sufficiently) erased */
+	if ((*addr & data) != data) {
+		printf ("not erased at %08lx (%lx)\n", (ulong) addr, *addr);
+		return (2);
+	}
+	/* Disable interrupts which might cause a timeout here */
+	flag = disable_interrupts ();
+
+	*addr = (FPW) 0x00400040;	/* write setup */
+	*addr = data;
+
+	/* arm simple, non interrupt dependent timer */
+	reset_timer_masked ();
+
+	/* wait while polling the status register */
+	while (((status = *addr) & (FPW) 0x00800080) != (FPW) 0x00800080) {
+		if (get_timer_masked () > CFG_FLASH_WRITE_TOUT) {
+			*addr = (FPW) 0x00FF00FF;	/* restore read mode */
+			return (1);
+		}
+	}
+
+	*addr = (FPW) 0x00FF00FF;	/* restore read mode */
+
+	return (0);
+}
+
+void inline spin_wheel (void)
+{
+	static int p = 0;
+	static char w[] = "\\/-";
+
+	printf ("\010%c", w[p]);
+	(++p == 3) ? (p = 0) : 0;
+}
diff --git a/board/cerf250/lowlevel_init.S b/board/cerf250/lowlevel_init.S
new file mode 100755
index 0000000..c9b68d7
--- /dev/null
+++ b/board/cerf250/lowlevel_init.S
@@ -0,0 +1,411 @@
+/*
+ * Most of this taken from Redboot hal_platform_setup.h with cleanup
+ *
+ * NOTE: I haven't clean this up considerably, just enough to get it
+ * running. See hal_platform_setup.h for the source. See
+ * board/cradle/lowlevel_init.S for another PXA250 setup that is
+ * much cleaner.
+ *
+ * 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 <config.h>
+#include <version.h>
+#include <asm/arch/pxa-regs.h>
+
+DRAM_SIZE:  .long   CFG_DRAM_SIZE
+
+/* wait for coprocessor write complete */
+   .macro CPWAIT reg
+   mrc  p15,0,\reg,c2,c0,0
+   mov  \reg,\reg
+   sub  pc,pc,#4
+   .endm
+
+
+/*
+ * 	Memory setup
+ */
+
+.globl lowlevel_init
+lowlevel_init:
+
+	/* Set up GPIO pins first ----------------------------------------- */
+
+	ldr		r0,	=GPSR0
+	ldr		r1,	=CFG_GPSR0_VAL
+	str		r1,	[r0]
+
+	ldr		r0,	=GPSR1
+	ldr		r1,	=CFG_GPSR1_VAL
+	str		r1,  [r0]
+
+	ldr		r0,	=GPSR2
+	ldr		r1,	=CFG_GPSR2_VAL
+	str		r1,	[r0]
+
+	ldr		r0,	=GPCR0
+	ldr		r1,	=CFG_GPCR0_VAL
+	str		r1,	[r0]
+
+	ldr		r0,	=GPCR1
+	ldr		r1,	=CFG_GPCR1_VAL
+	str		r1,	[r0]
+
+	ldr		r0,	=GPCR2
+	ldr		r1,	=CFG_GPCR2_VAL
+	str		r1,	[r0]
+
+	ldr		r0,	=GPDR0
+	ldr		r1,	=CFG_GPDR0_VAL
+	str		r1,	[r0]
+
+	ldr		r0,	=GPDR1
+	ldr		r1,	=CFG_GPDR1_VAL
+	str		r1,	[r0]
+
+	ldr		r0,	=GPDR2
+	ldr		r1,	=CFG_GPDR2_VAL
+	str		r1,	[r0]
+
+	ldr		r0,	=GAFR0_L
+	ldr		r1,	=CFG_GAFR0_L_VAL
+	str		r1,	[r0]
+
+	ldr		r0,	=GAFR0_U
+	ldr		r1,	=CFG_GAFR0_U_VAL
+	str		r1,	[r0]
+
+	ldr		r0,	=GAFR1_L
+	ldr		r1,	=CFG_GAFR1_L_VAL
+	str		r1,	[r0]
+
+	ldr		r0,	=GAFR1_U
+	ldr		r1,	=CFG_GAFR1_U_VAL
+	str		r1,	[r0]
+
+	ldr		r0,	=GAFR2_L
+	ldr		r1,	=CFG_GAFR2_L_VAL
+	str		r1,	[r0]
+
+	ldr		r0,	=GAFR2_U
+	ldr		r1,	=CFG_GAFR2_U_VAL
+	str		r1,	[r0]
+
+	ldr		r0,	=PSSR				/* enable GPIO pins */
+	ldr		r1,	=CFG_PSSR_VAL
+	str		r1,	[r0]
+
+	/* ---------------------------------------------------------------- */
+	/* Enable memory interface                                          */
+	/*                                                                  */
+	/* The sequence below is based on the recommended init steps        */
+	/* detailed in the Intel PXA250 Operating Systems Developers Guide, */
+	/* Chapter 10.                                                      */
+	/* ---------------------------------------------------------------- */
+
+	/* ---------------------------------------------------------------- */
+	/* Step 1: Wait for at least 200 microsedonds to allow internal     */
+	/*         clocks to settle. Only necessary after hard reset...     */
+	/*         FIXME: can be optimized later                            */
+	/* ---------------------------------------------------------------- */
+
+	ldr		r3,	=OSCR			/* reset the OS Timer Count to zero */
+	mov 	r2,	#0
+	str 	r2,	[r3]
+	ldr 	r4,	=0x300				/* really 0x2E1 is about 200usec,   */
+							/* so 0x300 should be plenty        */
+1:
+	ldr 	r2,	[r3]
+	cmp 	r4,	r2
+	bgt 	1b
+
+mem_init:
+
+	ldr  	r1,	=MEMC_BASE		/* get memory controller base addr. */
+
+	/* ---------------------------------------------------------------- */
+	/* Step 2a: Initialize Asynchronous static memory controller        */
+	/* ---------------------------------------------------------------- */
+
+	/* MSC registers: timing, bus width, mem type                       */
+
+	/* MSC0: nCS(0,1)                                                   */
+	ldr  	r2,	=CFG_MSC0_VAL
+	str  	r2,	[r1, #MSC0_OFFSET]
+	ldr  	r2,	[r1, #MSC0_OFFSET]	/* read back to ensure      */
+						/* that data latches        */
+	/* MSC1: nCS(2,3)                                                   */
+	ldr  	r2,	=CFG_MSC1_VAL
+	str  	r2,	[r1, #MSC1_OFFSET]
+	ldr  	r2,	[r1, #MSC1_OFFSET]
+
+	/* MSC2: nCS(4,5)                                                   */
+	ldr  	r2,	=CFG_MSC2_VAL
+	str  	r2,	[r1, #MSC2_OFFSET]
+	ldr  	r2,	[r1, #MSC2_OFFSET]
+
+	/* ---------------------------------------------------------------- */
+	/* Step 2b: Initialize Card Interface                               */
+	/* ---------------------------------------------------------------- */
+
+	/* MECR: Memory Expansion Card Register                             */
+	ldr  	r2,	=CFG_MECR_VAL
+	str  	r2,	[r1, #MECR_OFFSET]
+	ldr	 	r2,	[r1, #MECR_OFFSET]
+
+	/* MCMEM0: Card Interface slot 0 timing                             */
+	ldr  	r2,	=CFG_MCMEM0_VAL
+	str  	r2,	[r1, #MCMEM0_OFFSET]
+	ldr	 	r2,	[r1, #MCMEM0_OFFSET]
+
+	/* MCMEM1: Card Interface slot 1 timing                             */
+	ldr  	r2,	=CFG_MCMEM1_VAL
+	str  	r2,	[r1, #MCMEM1_OFFSET]
+	ldr	 	r2,	[r1, #MCMEM1_OFFSET]
+
+	/* MCATT0: Card Interface Attribute Space Timing, slot 0            */
+	ldr  	r2,	=CFG_MCATT0_VAL
+	str  	r2,	[r1, #MCATT0_OFFSET]
+	ldr	 	r2,	[r1, #MCATT0_OFFSET]
+
+	/* MCATT1: Card Interface Attribute Space Timing, slot 1            */
+	ldr  	r2, =CFG_MCATT1_VAL
+	str  	r2, [r1, #MCATT1_OFFSET]
+	ldr	 	r2,	[r1, #MCATT1_OFFSET]
+
+	/* MCIO0: Card Interface I/O Space Timing, slot 0                   */
+	ldr  	r2, =CFG_MCIO0_VAL
+	str  	r2, [r1, #MCIO0_OFFSET]
+	ldr	 	r2,	[r1, #MCIO0_OFFSET]
+
+	/* MCIO1: Card Interface I/O Space Timing, slot 1                   */
+	ldr  	r2, =CFG_MCIO1_VAL
+	str  	r2, [r1, #MCIO1_OFFSET]
+	ldr	 	r2,	[r1, #MCIO1_OFFSET]
+
+	/* ---------------------------------------------------------------- */
+	/* Step 2c: Write FLYCNFG  FIXME: what's that???                    */
+	/* ---------------------------------------------------------------- */
+
+
+	/* ---------------------------------------------------------------- */
+	/* Step 2d: Initialize Timing for Sync Memory (SDCLK0)              */
+	/* ---------------------------------------------------------------- */
+
+	/* Before accessing MDREFR we need a valid DRI field, so we set     */
+	/* this to power on defaults + DRI field, set SDRAM clocks free running */
+
+	ldr  	r3, =CFG_MDREFR_VAL
+	ldr  	r2, =0xFFF
+	and  	r3, r3,  r2
+
+	ldr	 	r0,	[r1, #MDREFR_OFFSET]
+	bic	 	r0, r0, r2
+	bic	 	r0, r0, #(MDREFR_K0FREE|MDREFR_K1FREE|MDREFR_K2FREE)
+	orr	 	r0, r0, r3
+
+	str		r0,	[r1, #MDREFR_OFFSET]	/* write back MDREFR        */
+
+
+	/* ---------------------------------------------------------------- */
+	/* Step 3: Initialize Synchronous Static Memory (Flash/Peripherals) */
+	/* ---------------------------------------------------------------- */
+
+	/* Initialize SXCNFG register. Assert the enable bits               */
+
+	/* Write SXMRS to cause an MRS command to all enabled banks of      */
+	/* synchronous static memory. Note that SXLCR need not be written   */
+	/* at this time.                                                    */
+
+	/* FIXME: we use async mode for now                                 */
+
+
+	/* ---------------------------------------------------------------- */
+	/* Step 4: Initialize SDRAM                                         */
+	/* ---------------------------------------------------------------- */
+
+	/* set MDREFR according to user define with exception of a few bits */
+
+	ldr     r4, =CFG_MDREFR_VAL
+	ldr		r2, =(MDREFR_K0RUN|MDREFR_K0DB2|MDREFR_K1RUN|MDREFR_K1DB2|\
+					MDREFR_K2RUN |MDREFR_K2DB2)
+	and		r4, r4, r2
+	bic		r0,	r0,	r2
+	orr		r0, r0, r4
+
+	str     r0, [r1, #MDREFR_OFFSET]    /* write back MDREFR        */
+	ldr     r0, [r1, #MDREFR_OFFSET]
+
+	/* Step 4b: de-assert MDREFR:SLFRSH.                                */
+
+	bic		r0, r0,	#(MDREFR_SLFRSH)
+	str     r0, [r1, #MDREFR_OFFSET]    /* write back MDREFR        */
+	ldr     r0, [r1, #MDREFR_OFFSET]
+
+
+	/* Step 4c: assert MDREFR:E1PIN and E0PIO as desired, set KXFREE  */
+
+	ldr     r4, =CFG_MDREFR_VAL
+	ldr		r2, =(MDREFR_E0PIN|MDREFR_E1PIN|MDREFR_K0FREE| \
+					MDREFR_K1FREE | MDREFR_K2FREE)
+	and		r4, r4, r2
+	orr		r0, r0, r4
+	str     r0, [r1, #MDREFR_OFFSET]    /* write back MDREFR        */
+	ldr     r0, [r1, #MDREFR_OFFSET]
+
+
+	/* Step 4d: write MDCNFG with MDCNFG:DEx deasserted (set to 0), to  */
+	/*          configure but not enable each SDRAM partition pair.     */
+
+	ldr		r4,	=CFG_MDCNFG_VAL
+	bic		r4,	r4,	#(MDCNFG_DE0|MDCNFG_DE1)
+	bic		r4, r4,	#(MDCNFG_DE2|MDCNFG_DE3)
+	str     r4, [r1, #MDCNFG_OFFSET]	/* write back MDCNFG        */
+	ldr     r4, [r1, #MDCNFG_OFFSET]
+
+
+	/* Step 4e: Wait for the clock to the SDRAMs to stabilize,          */
+	/*          100..200 µsec.                                          */
+
+	ldr 	r3, =OSCR			/* reset the OS Timer Count to zero */
+	mov 	r2, #0
+	str 	r2, [r3]
+	ldr 	r4, =0x300			/* really 0x2E1 is about 200usec,   */
+						/* so 0x300 should be plenty        */
+1:
+	ldr 	r2, [r3]
+	cmp 	r4, r2
+	bgt 	1b
+
+
+	/* Step 4f: Trigger a number (usually 8) refresh cycles by          */
+	/*          attempting non-burst read or write accesses to disabled */
+	/*          SDRAM, as commonly specified in the power up sequence   */
+	/*          documented in SDRAM data sheets. The address(es) used   */
+	/*          for this purpose must not be cacheable.                 */
+
+	ldr		r3,	=CFG_DRAM_BASE
+.rept 8
+	str		r2,	[r3]
+.endr
+
+	/* Step 4g: Write MDCNFG with enable bits asserted                  */
+	/*          (MDCNFG:DEx set to 1).                                  */
+
+	ldr     r3, [r1, #MDCNFG_OFFSET]
+	orr	r3,	r3,	#(MDCNFG_DE0|MDCNFG_DE1)
+	str     r3, [r1, #MDCNFG_OFFSET]
+
+	/* Step 4h: Write MDMRS.                                            */
+
+	ldr     r2, =CFG_MDMRS_VAL
+	str     r2, [r1, #MDMRS_OFFSET]
+
+
+	/* We are finished with Intel's memory controller initialisation    */
+
+
+	/* ---------------------------------------------------------------- */
+	/* Disable (mask) all interrupts at interrupt controller            */
+	/* ---------------------------------------------------------------- */
+
+initirqs:
+
+	mov     r1, #0		/* clear int. level register (IRQ, not FIQ) */
+	ldr     r2, =ICLR
+	str     r1, [r2]
+
+	ldr     r2, =ICMR	/* mask all interrupts at the controller    */
+	str     r1, [r2]
+
+
+	/* ---------------------------------------------------------------- */
+	/* Clock initialisation                                             */
+	/* ---------------------------------------------------------------- */
+
+initclks:
+
+	/* Disable the peripheral clocks, and set the core clock frequency  */
+
+	/* Turn Off ALL on-chip peripheral clocks for re-configuration      */
+	/* Note: See label 'ENABLECLKS' for the re-enabling                 */
+	ldr     r1, =CKEN
+	mov     r2, #0
+	str     r2, [r1]
+
+
+	/* default value in case no valid rotary switch setting is found    */
+	ldr     r2, =(CCCR_L27|CCCR_M2|CCCR_N10)  /* DEFAULT: {200/200/100} */
+
+	/* ... and write the core clock config register                     */
+	ldr     r1, =CCCR
+	str     r2, [r1]
+
+#ifdef RTC
+	/* enable the 32Khz oscillator for RTC and PowerManager             */
+
+	ldr     r1, =OSCC
+	mov     r2, #OSCC_OON
+	str     r2, [r1]
+
+	/* NOTE:  spin here until OSCC.OOK get set, meaning the PLL         */
+	/* has settled.                                                     */
+60:
+	ldr     r2, [r1]
+	ands    r2, r2, #1
+	beq     60b
+#endif
+
+	/* ---------------------------------------------------------------- */
+	/*                                                                  */
+	/* ---------------------------------------------------------------- */
+
+	/* Save SDRAM size */
+    ldr     r1, =DRAM_SIZE
+	str   	r8, [r1]
+
+	/* Interrupt init: Mask all interrupts                              */
+    ldr		r0,	=ICMR /* enable no sources */
+	mov 	r1,	#0
+    str 	r1,	[r0]
+
+	/* FIXME */
+
+#define NODEBUG
+#ifdef NODEBUG
+	/*Disable software and data breakpoints */
+	mov		r0,#0
+	mcr		p15,0,r0,c14,c8,0  /* ibcr0 */
+	mcr		p15,0,r0,c14,c9,0  /* ibcr1 */
+	mcr		p15,0,r0,c14,c4,0  /* dbcon */
+
+	/*Enable all debug functionality */
+	mov		r0,#0x80000000
+	mcr		p14,0,r0,c10,c0,0  /* dcsr */
+
+#endif
+
+	/* ---------------------------------------------------------------- */
+	/* End lowlevel_init                                                     */
+	/* ---------------------------------------------------------------- */
+
+endlowlevel_init:
+
+    mov     pc,	lr
diff --git a/board/cerf250/u-boot.lds b/board/cerf250/u-boot.lds
new file mode 100755
index 0000000..f010239
--- /dev/null
+++ b/board/cerf250/u-boot.lds
@@ -0,0 +1,56 @@
+/*
+ * (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_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
+OUTPUT_ARCH(arm)
+ENTRY(_start)
+SECTIONS
+{
+	. = 0x00000000;
+
+	. = ALIGN(4);
+	.text      :
+	{
+	  cpu/pxa/start.o	(.text)
+	  *(.text)
+	}
+
+	. = ALIGN(4);
+	.rodata : { *(.rodata) }
+
+	. = ALIGN(4);
+	.data : { *(.data) }
+
+	. = ALIGN(4);
+	.got : { *(.got) }
+
+	. = .;
+	__u_boot_cmd_start = .;
+	.u_boot_cmd : { *(.u_boot_cmd) }
+	__u_boot_cmd_end = .;
+
+	. = ALIGN(4);
+	__bss_start = .;
+	.bss : { *(.bss) }
+	_end = .;
+}