Initial revision

4 files changed, 871 insertions, 0 deletions

diff --git a/lib_arm/_udivsi3.S b/lib_arm/_udivsi3.S
new file mode 100644
index 0000000..19454c1
--- /dev/null
+++ b/lib_arm/_udivsi3.S
@@ -0,0 +1,77 @@
+/* # 1 "libgcc1.S" */
+@ libgcc1 routines for ARM cpu.
+@ Division routines, written by Richard Earnshaw, (rearnsha@armltd.co.uk)
+dividend	.req	r0
+divisor		.req	r1
+result		.req	r2
+curbit		.req	r3
+ip		.req	r12
+sp		.req	r13
+lr		.req	r14
+pc		.req	r15
+	.text
+	.globl	 __udivsi3
+	.type  __udivsi3       ,function
+	.align	0
+ __udivsi3      :
+	cmp	divisor, #0
+	beq	Ldiv0
+	mov	curbit, #1
+	mov	result, #0
+	cmp	dividend, divisor
+	bcc	Lgot_result
+Loop1:
+	@ Unless the divisor is very big, shift it up in multiples of
+	@ four bits, since this is the amount of unwinding in the main
+	@ division loop.  Continue shifting until the divisor is
+	@ larger than the dividend.
+	cmp	divisor, #0x10000000
+	cmpcc	divisor, dividend
+	movcc	divisor, divisor, lsl #4
+	movcc	curbit, curbit, lsl #4
+	bcc	Loop1
+Lbignum:
+	@ For very big divisors, we must shift it a bit at a time, or
+	@ we will be in danger of overflowing.
+	cmp	divisor, #0x80000000
+	cmpcc	divisor, dividend
+	movcc	divisor, divisor, lsl #1
+	movcc	curbit, curbit, lsl #1
+	bcc	Lbignum
+Loop3:
+	@ Test for possible subtractions, and note which bits
+	@ are done in the result.  On the final pass, this may subtract
+	@ too much from the dividend, but the result will be ok, since the
+	@ "bit" will have been shifted out at the bottom.
+	cmp	dividend, divisor
+	subcs	dividend, dividend, divisor
+	orrcs	result, result, curbit
+	cmp	dividend, divisor, lsr #1
+	subcs	dividend, dividend, divisor, lsr #1
+	orrcs	result, result, curbit, lsr #1
+	cmp	dividend, divisor, lsr #2
+	subcs	dividend, dividend, divisor, lsr #2
+	orrcs	result, result, curbit, lsr #2
+	cmp	dividend, divisor, lsr #3
+	subcs	dividend, dividend, divisor, lsr #3
+	orrcs	result, result, curbit, lsr #3
+	cmp	dividend, #0			@ Early termination?
+	movnes	curbit, curbit, lsr #4		@ No, any more bits to do?
+	movne	divisor, divisor, lsr #4
+	bne	Loop3
+Lgot_result:
+	mov	r0, result
+	mov 	pc, lr
+Ldiv0:
+	str	lr, [sp, #-4]!
+	bl	 __div0       (PLT)
+	mov	r0, #0			@ about as wrong as it could be
+	ldmia	sp!, {pc}
+	.size  __udivsi3       , . -  __udivsi3
+/* # 235 "libgcc1.S" */
+/* # 320 "libgcc1.S" */
+/* # 421 "libgcc1.S" */
+/* # 433 "libgcc1.S" */
+/* # 456 "libgcc1.S" */
+/* # 500 "libgcc1.S" */
+/* # 580 "libgcc1.S" */
diff --git a/lib_arm/_umodsi3.S b/lib_arm/_umodsi3.S
new file mode 100644
index 0000000..899ffbf
--- /dev/null
+++ b/lib_arm/_umodsi3.S
@@ -0,0 +1,88 @@
+/* # 1 "libgcc1.S" */
+@ libgcc1 routines for ARM cpu.
+@ Division routines, written by Richard Earnshaw, (rearnsha@armltd.co.uk)
+/* # 145 "libgcc1.S" */
+dividend	.req	r0
+divisor		.req	r1
+overdone	.req	r2
+curbit		.req	r3
+ip		.req	r12
+sp		.req	r13
+lr		.req	r14
+pc		.req	r15
+	.text
+	.globl	 __umodsi3
+	.type  __umodsi3       ,function
+	.align 0
+ __umodsi3      :
+	cmp	divisor, #0
+	beq	Ldiv0
+	mov	curbit, #1
+	cmp	dividend, divisor
+	movcc  	pc, lr
+Loop1:
+	@ Unless the divisor is very big, shift it up in multiples of
+	@ four bits, since this is the amount of unwinding in the main
+	@ division loop.  Continue shifting until the divisor is
+	@ larger than the dividend.
+	cmp	divisor, #0x10000000
+	cmpcc	divisor, dividend
+	movcc	divisor, divisor, lsl #4
+	movcc	curbit, curbit, lsl #4
+	bcc	Loop1
+Lbignum:
+	@ For very big divisors, we must shift it a bit at a time, or
+	@ we will be in danger of overflowing.
+	cmp	divisor, #0x80000000
+	cmpcc	divisor, dividend
+	movcc	divisor, divisor, lsl #1
+	movcc	curbit, curbit, lsl #1
+	bcc	Lbignum
+Loop3:
+	@ Test for possible subtractions.  On the final pass, this may
+	@ subtract too much from the dividend, so keep track of which
+	@ subtractions are done, we can fix them up afterwards...
+	mov	overdone, #0
+	cmp	dividend, divisor
+	subcs	dividend, dividend, divisor
+	cmp	dividend, divisor, lsr #1
+	subcs	dividend, dividend, divisor, lsr #1
+	orrcs	overdone, overdone, curbit, ror #1
+	cmp	dividend, divisor, lsr #2
+	subcs	dividend, dividend, divisor, lsr #2
+	orrcs	overdone, overdone, curbit, ror #2
+	cmp	dividend, divisor, lsr #3
+	subcs	dividend, dividend, divisor, lsr #3
+	orrcs	overdone, overdone, curbit, ror #3
+	mov	ip, curbit
+	cmp	dividend, #0			@ Early termination?
+	movnes	curbit, curbit, lsr #4		@ No, any more bits to do?
+	movne	divisor, divisor, lsr #4
+	bne	Loop3
+	@ Any subtractions that we should not have done will be recorded in
+	@ the top three bits of "overdone".  Exactly which were not needed
+	@ are governed by the position of the bit, stored in ip.
+	@ If we terminated early, because dividend became zero,
+	@ then none of the below will match, since the bit in ip will not be
+	@ in the bottom nibble.
+	ands	overdone, overdone, #0xe0000000
+	moveq  	pc, lr				@ No fixups needed
+	tst	overdone, ip, ror #3
+	addne	dividend, dividend, divisor, lsr #3
+	tst	overdone, ip, ror #2
+	addne	dividend, dividend, divisor, lsr #2
+	tst	overdone, ip, ror #1
+	addne	dividend, dividend, divisor, lsr #1
+	mov 	pc, lr
+Ldiv0:
+	str	lr, [sp, #-4]!
+	bl	 __div0       (PLT)
+	mov	r0, #0			@ about as wrong as it could be
+	ldmia	sp!, {pc}
+	.size  __umodsi3       , . -  __umodsi3
+/* # 320 "libgcc1.S" */
+/* # 421 "libgcc1.S" */
+/* # 433 "libgcc1.S" */
+/* # 456 "libgcc1.S" */
+/* # 500 "libgcc1.S" */
+/* # 580 "libgcc1.S" */
diff --git a/lib_arm/armlinux.c b/lib_arm/armlinux.c
new file mode 100644
index 0000000..e5b8faa
--- /dev/null
+++ b/lib_arm/armlinux.c
@@ -0,0 +1,324 @@
+/*
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Marius Groeger <mgroeger@sysgo.de>
+ *
+ * Copyright (C) 2001  Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
+ *
+ * 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 <command.h>
+#include <cmd_boot.h>
+#include <image.h>
+#include <zlib.h>
+#include <asm/byteorder.h>
+
+#include <asm/setup.h>
+#define tag_size(type)  ((sizeof(struct tag_header) + sizeof(struct type)) >> 2)
+#define tag_next(t)     ((struct tag *)((u32 *)(t) + (t)->hdr.size))
+
+#if defined (CONFIG_SETUP_MEMORY_TAGS) || \
+    defined (CONFIG_CMDLINE_TAG) || \
+    defined (CONFIG_INITRD_TAG) || \
+    defined (CONFIG_VFD)
+static void setup_start_tag(bd_t *bd);
+static void setup_memory_tags(bd_t *bd);
+static void setup_commandline_tag(bd_t *bd, char *commandline);
+#if 0
+static void setup_ramdisk_tag(bd_t *bd);
+#endif
+static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end);
+static void setup_end_tag(bd_t *bd);
+#if defined (CONFIG_VFD)
+static void setup_videolfb_tag(gd_t *gd);
+#endif
+
+
+static struct tag *params;
+#endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */
+
+extern image_header_t header;           /* from cmd_bootm.c */
+
+
+void do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
+		ulong addr, ulong *len_ptr, int   verify)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+    ulong len = 0, checksum;
+    ulong initrd_start, initrd_end;
+    ulong data;
+    void (*theKernel)(int zero, int arch);
+    image_header_t *hdr = &header;
+    bd_t *bd = gd->bd;
+#ifdef CONFIG_CMDLINE_TAG
+    char *commandline = getenv("bootargs");
+#endif
+
+    theKernel = (void (*)(int, int))ntohl(hdr->ih_ep);
+
+    /*
+     * Check if there is an initrd image
+     */
+    if (argc >= 3) {
+	addr = simple_strtoul(argv[2], NULL, 16);
+
+	printf ("## Loading Ramdisk Image at %08lx ...\n", addr);
+
+	/* Copy header so we can blank CRC field for re-calculation */
+	memcpy (&header, (char *)addr, sizeof(image_header_t));
+
+	if (ntohl(hdr->ih_magic) != IH_MAGIC) {
+	    printf ("Bad Magic Number\n");
+	    do_reset (cmdtp, flag, argc, argv);
+	}
+
+	data = (ulong)&header;
+	len  = sizeof(image_header_t);
+
+	checksum = ntohl(hdr->ih_hcrc);
+	hdr->ih_hcrc = 0;
+
+	if (crc32 (0, (char *)data, len) != checksum) {
+	    printf ("Bad Header Checksum\n");
+	    do_reset (cmdtp, flag, argc, argv);
+	}
+
+	print_image_hdr (hdr);
+
+	data = addr + sizeof(image_header_t);
+	len  = ntohl(hdr->ih_size);
+
+	if (verify) {
+	    ulong csum = 0;
+
+	    printf ("   Verifying Checksum ... ");
+	    csum = crc32 (0, (char *)data, len);
+	    if (csum != ntohl(hdr->ih_dcrc)) {
+		printf ("Bad Data CRC\n");
+		do_reset (cmdtp, flag, argc, argv);
+	    }
+	    printf ("OK\n");
+	}
+
+	if ((hdr->ih_os   != IH_OS_LINUX)	||
+	    (hdr->ih_arch != IH_CPU_ARM)	||
+	    (hdr->ih_type != IH_TYPE_RAMDISK)	) {
+	    printf ("No Linux ARM Ramdisk Image\n");
+	    do_reset (cmdtp, flag, argc, argv);
+	}
+
+	/*
+	 * Now check if we have a multifile image
+	 */
+    } else if ((hdr->ih_type==IH_TYPE_MULTI) && (len_ptr[1])) {
+	ulong tail    = ntohl(len_ptr[0]) % 4;
+	int i;
+
+	/* skip kernel length and terminator */
+	data = (ulong)(&len_ptr[2]);
+	/* skip any additional image length fields */
+	for (i=1; len_ptr[i]; ++i)
+	  data += 4;
+	/* add kernel length, and align */
+	data += ntohl(len_ptr[0]);
+	if (tail) {
+	    data += 4 - tail;
+	}
+
+	len   = ntohl(len_ptr[1]);
+
+    } else {
+	/*
+	 * no initrd image
+	 */
+	data = 0;
+    }
+
+#ifdef	DEBUG
+    if (!data) {
+	printf ("No initrd\n");
+    }
+#endif
+
+    if (data) {
+	initrd_start = data;
+	initrd_end   = initrd_start + len;
+    } else {
+	initrd_start = 0;
+	initrd_end = 0;
+    }
+
+#ifdef DEBUG
+    printf ("## Transferring control to Linux (at address %08lx) ...\n",
+	    (ulong)theKernel);
+#endif
+
+#if defined (CONFIG_SETUP_MEMORY_TAGS) || \
+    defined (CONFIG_CMDLINE_TAG) || \
+    defined (CONFIG_INITRD_TAG) || \
+    defined (CONFIG_VFD)
+    setup_start_tag(bd);
+#ifdef CONFIG_SETUP_MEMORY_TAGS
+    setup_memory_tags(bd);
+#endif
+#ifdef CONFIG_CMDLINE_TAG
+    setup_commandline_tag(bd, commandline);
+#endif
+#ifdef CONFIG_INITRD_TAG
+    setup_initrd_tag(bd, initrd_start, initrd_end);
+#endif
+#if 0
+    setup_ramdisk_tag(bd);
+#endif
+#if defined (CONFIG_VFD)
+    setup_videolfb_tag(gd);
+#endif
+    setup_end_tag(bd);
+#endif
+
+    /* we assume that the kernel is in place */
+    printf("\nStarting kernel ...\n\n");
+
+    cleanup_before_linux();
+
+    theKernel(0, bd->bi_arch_number);
+}
+
+
+#if defined (CONFIG_SETUP_MEMORY_TAGS) || \
+    defined (CONFIG_CMDLINE_TAG) || \
+    defined (CONFIG_INITRD_TAG) || \
+    defined (CONFIG_VFD)
+static void setup_start_tag(bd_t *bd)
+{
+    params = (struct tag *)bd->bi_boot_params;
+
+    params->hdr.tag = ATAG_CORE;
+    params->hdr.size = tag_size(tag_core);
+
+    params->u.core.flags = 0;
+    params->u.core.pagesize = 0;
+    params->u.core.rootdev = 0;
+
+    params = tag_next(params);
+}
+
+
+static void setup_memory_tags(bd_t *bd)
+{
+    int i;
+
+    for(i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
+	params->hdr.tag = ATAG_MEM;
+	params->hdr.size = tag_size(tag_mem32);
+
+	params->u.mem.start = bd->bi_dram[i].start;
+	params->u.mem.size = bd->bi_dram[i].size;
+
+	params = tag_next(params);
+    }
+}
+
+
+static void setup_commandline_tag(bd_t *bd, char *commandline)
+{
+    char *p;
+
+    /* eat leading white space */
+    for(p = commandline; *p == ' '; p++)
+      ;
+
+    /* skip non-existent command lines so the kernel will still
+     * use its default command line.
+     */
+    if(*p == '\0')
+      return;
+
+    params->hdr.tag = ATAG_CMDLINE;
+    params->hdr.size = (sizeof(struct tag_header) + strlen(p) + 1 + 4) >> 2;
+
+    strcpy(params->u.cmdline.cmdline, p);
+
+    params = tag_next(params);
+}
+
+
+#ifndef ATAG_INITRD2
+#define ATAG_INITRD2    0x54420005
+#endif
+static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end)
+{
+    /* an ATAG_INITRD node tells the kernel where the compressed
+     * ramdisk can be found. ATAG_RDIMG is a better name, actually.
+     */
+    params->hdr.tag = ATAG_INITRD2;
+    params->hdr.size = tag_size(tag_initrd);
+
+    params->u.initrd.start = initrd_start;
+    params->u.initrd.size = initrd_end - initrd_start;
+
+    params = tag_next(params);
+}
+
+
+#if 0
+static void setup_ramdisk_tag(bd_t *bd)
+{
+    /* an ATAG_RAMDISK node tells the kernel how large the
+     * decompressed ramdisk will become.
+     */
+    params->hdr.tag = ATAG_RAMDISK;
+    params->hdr.size = tag_size(tag_ramdisk);
+
+    params->u.ramdisk.start = 0;
+    /*params->u.ramdisk.size = RAMDISK_SIZE; */
+    params->u.ramdisk.flags = 1;	/* automatically load ramdisk */
+
+    params = tag_next(params);
+}
+#endif /* 0 */
+
+#if defined (CONFIG_VFD)
+static void setup_videolfb_tag(gd_t *gd)
+{
+    /* An ATAG_VIDEOLFB node tells the kernel where and how large
+     * the framebuffer for video was allocated (among other things).
+     * Note that a _physical_ address is passed !
+     *
+     * We only use it to pass the address and size, the other entries
+     * in the tag_videolfb are not of interest.
+     */
+    params->hdr.tag = ATAG_VIDEOLFB;
+    params->hdr.size = tag_size(tag_videolfb);
+
+    params->u.videolfb.lfb_base = (u32)gd->fb_base;
+    /* 7168 = 256*4*56/8 - actually 2 pages (8192 bytes) are allocated */
+    params->u.videolfb.lfb_size = 7168;
+
+    params = tag_next(params);
+}
+#endif
+
+static void setup_end_tag(bd_t *bd)
+{
+    params->hdr.tag = ATAG_NONE;
+    params->hdr.size = 0;
+}
+
+#endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */
diff --git a/lib_arm/board.c b/lib_arm/board.c
new file mode 100644
index 0000000..e58529f
--- /dev/null
+++ b/lib_arm/board.c
@@ -0,0 +1,382 @@
+/*
+ * (C) Copyright 2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * (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>
+#include <command.h>
+#include <devices.h>
+#include <version.h>
+#include <net.h>
+
+
+const char version_string[] =
+	U_BOOT_VERSION" (" __DATE__ " - " __TIME__ ")";
+
+#ifdef CONFIG_DRIVER_CS8900
+extern void cs8900_get_enetaddr (uchar * addr);
+#endif
+
+/*
+ * Begin and End of memory area for malloc(), and current "brk"
+ */
+static ulong mem_malloc_start = 0;
+static ulong mem_malloc_end = 0;
+static ulong mem_malloc_brk = 0;
+
+static void mem_malloc_init (ulong dest_addr)
+{
+	mem_malloc_start = dest_addr;
+	mem_malloc_end = dest_addr + CONFIG_MALLOC_SIZE;
+	mem_malloc_brk = mem_malloc_start;
+
+	memset ((void *) mem_malloc_start, 0,
+			mem_malloc_end - mem_malloc_start);
+}
+
+void *sbrk (ptrdiff_t increment)
+{
+	ulong old = mem_malloc_brk;
+	ulong new = old + increment;
+
+	if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
+		return (NULL);
+	}
+	mem_malloc_brk = new;
+
+	return ((void *) old);
+}
+
+/************************************************************************
+ * Init Utilities							*
+ ************************************************************************
+ * Some of this code should be moved into the core functions,
+ * or dropped completely,
+ * but let's get it working (again) first...
+ */
+
+static int init_baudrate (void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	uchar tmp[64];	/* long enough for environment variables */
+	int i = getenv_r ("baudrate", tmp, sizeof (tmp));
+
+	gd->baudrate = (i > 0)
+			? (int) simple_strtoul (tmp, NULL, 10)
+			: CONFIG_BAUDRATE;
+
+	return (0);
+}
+
+static int display_banner (void)
+{
+
+	printf ("\n\n%s\n\n", version_string);
+	printf ("U-Boot code: %08lX -> %08lX  BSS: -> %08lX\n",
+		_armboot_start, _armboot_end_data, _armboot_end);
+#ifdef CONFIG_MODEM_SUPPORT
+	puts ("Modem Support enabled\n");
+#endif
+#ifdef CONFIG_USE_IRQ
+	printf ("IRQ Stack: %08lx\n", IRQ_STACK_START);
+	printf ("FIQ Stack: %08lx\n", FIQ_STACK_START);
+#endif
+	return (0);
+}
+
+/*
+ * WARNING: this code looks "cleaner" than the PowerPC version, but
+ * has the disadvantage that you either get nothing, or everything.
+ * On PowerPC, you might see "DRAM: " before the system hangs - which
+ * gives a simple yet clear indication which part of the
+ * initialization if failing.
+ */
+static int display_dram_config (void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+	int i;
+
+	puts ("DRAM Configuration:\n");
+
+	for(i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
+		printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
+		print_size (gd->bd->bi_dram[i].size, "\n");
+	}
+
+	return (0);
+}
+
+static void display_flash_config (ulong size)
+{
+	puts ("Flash: ");
+	print_size (size, "\n");
+}
+
+
+
+/*
+ * Breath some life into the board...
+ *
+ * Initialize an SMC for serial comms, and carry out some hardware
+ * tests.
+ *
+ * The first part of initialization is running from Flash memory;
+ * its main purpose is to initialize the RAM so that we
+ * can relocate the monitor code to RAM.
+ */
+
+/*
+ * All attempts to come up with a "common" initialization sequence
+ * that works for all boards and architectures failed: some of the
+ * requirements are just _too_ different. To get rid of the resulting
+ * mess of board dependend #ifdef'ed code we now make the whole
+ * initialization sequence configurable to the user.
+ *
+ * The requirements for any new initalization function is simple: it
+ * receives a pointer to the "global data" structure as it's only
+ * argument, and returns an integer return code, where 0 means
+ * "continue" and != 0 means "fatal error, hang the system".
+ */
+typedef int (init_fnc_t) (void);
+
+init_fnc_t *init_sequence[] = {
+	cpu_init,		/* basic cpu dependent setup */
+	board_init,		/* basic board dependent setup */
+	interrupt_init,		/* set up exceptions */
+	env_init,		/* initialize environment */
+	init_baudrate,		/* initialze baudrate settings */
+	serial_init,		/* serial communications setup */
+	display_banner,
+	dram_init,		/* configure available RAM banks */
+	display_dram_config,
+
+	NULL,
+};
+
+void start_armboot (void)
+{
+	DECLARE_GLOBAL_DATA_PTR;
+
+	ulong size;
+	gd_t gd_data;
+	bd_t bd_data;
+	init_fnc_t **init_fnc_ptr;
+#ifdef CONFIG_VFD
+	unsigned long addr;
+#endif
+
+	/* Pointer is writable since we allocated a register for it */
+	gd = &gd_data;
+	memset (gd, 0, sizeof (gd_t));
+	gd->bd = &bd_data;
+	memset (gd->bd, 0, sizeof (bd_t));
+
+	for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
+		if ((*init_fnc_ptr)() != 0) {
+			hang ();
+		}
+	}
+
+	/* configure available FLASH banks */
+	size = flash_init ();
+	display_flash_config (size);
+
+#ifdef CONFIG_VFD
+#ifndef PAGE_SIZE
+#define PAGE_SIZE 4096
+#endif
+	/*
+	 * reserve memory for VFD display (always full pages)
+	 */
+	/* armboot_real_end is defined in the board-specific linker script */
+	addr = (_armboot_real_end + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
+	size = vfd_setmem (addr);
+	gd->fb_base = addr;
+	/* round to the next page boundary */
+	addr += size;
+	addr = (addr + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
+	mem_malloc_init (addr);
+#else
+	/* armboot_real_end is defined in the board-specific linker script */
+	mem_malloc_init (_armboot_real_end);
+#endif /* CONFIG_VFD */
+
+#ifdef CONFIG_VFD
+	/* must do this after the framebuffer is allocated */
+	drv_vfd_init();
+#endif
+	/* initialize environment */
+	env_relocate ();
+
+	/* IP Address */
+	bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");
+
+	/* MAC Address */
+	{
+		int i;
+		ulong reg;
+		char *s, *e;
+		uchar tmp[64];
+
+		i = getenv_r ("ethaddr", tmp, sizeof (tmp));
+		s = (i > 0) ? tmp : NULL;
+
+		for (reg = 0; reg < 6; ++reg) {
+			bd_data.bi_enetaddr[reg] = s ? simple_strtoul (s, &e, 16) : 0;
+			if (s)
+				s = (*e) ? e + 1 : e;
+		}
+	}
+
+#if defined(CONFIG_MISC_INIT_R)
+	/* miscellaneous platform dependent initialisations */
+	misc_init_r ();
+#endif
+
+	/* enable exceptions */
+	enable_interrupts ();
+
+#ifdef CONFIG_DRIVER_CS8900
+	if (!getenv ("ethaddr")) {
+		cs8900_get_enetaddr (gd->bd->bi_enetaddr);
+	}
+#endif
+
+#ifdef BOARD_POST_INIT
+	board_post_init ();
+#endif
+
+	/* main_loop() can return to retry autoboot, if so just run it again. */
+	for (;;) {
+		main_loop ();
+	}
+
+	/* NOTREACHED - no way out of command loop except booting */
+}
+
+void hang (void)
+{
+	puts ("### ERROR ### Please RESET the board ###\n");
+	for (;;);
+}
+
+#ifdef CONFIG_MODEM_SUPPORT
+/* called from main loop (common/main.c) */
+extern void  dbg(const char *fmt, ...);
+int mdm_init (void)
+{
+	char env_str[16];
+	char *init_str;
+	int i;
+	extern char console_buffer[];
+	static inline void mdm_readline(char *buf, int bufsiz);
+	extern void enable_putc(void);
+	extern int hwflow_onoff(int);
+
+	enable_putc(); /* enable serial_putc() */
+
+#ifdef CONFIG_HWFLOW
+	init_str = getenv("mdm_flow_control");
+	if (init_str && (strcmp(init_str, "rts/cts") == 0))
+		hwflow_onoff (1);
+	else
+		hwflow_onoff(-1);
+#endif
+
+	for (i = 1;;i++) {
+		sprintf(env_str, "mdm_init%d", i);
+		if ((init_str = getenv(env_str)) != NULL) {
+			serial_puts(init_str);
+			serial_puts("\n");
+			for(;;) {
+				mdm_readline(console_buffer, CFG_CBSIZE);
+				dbg("ini%d: [%s]", i, console_buffer);
+
+				if ((strcmp(console_buffer, "OK") == 0) ||
+					(strcmp(console_buffer, "ERROR") == 0)) {
+					dbg("ini%d: cmd done", i);
+					break;
+				} else /* in case we are originating call ... */
+					if (strncmp(console_buffer, "CONNECT", 7) == 0) {
+						dbg("ini%d: connect", i);
+						return 0;
+					}
+			}
+		} else
+			break; /* no init string - stop modem init */
+
+		udelay(100000);
+	}
+
+	udelay(100000);
+
+	/* final stage - wait for connect */
+	for(;i > 1;) { /* if 'i' > 1 - wait for connection
+				  message from modem */
+		mdm_readline(console_buffer, CFG_CBSIZE);
+		dbg("ini_f: [%s]", console_buffer);
+		if (strncmp(console_buffer, "CONNECT", 7) == 0) {
+			dbg("ini_f: connected");
+			return 0;
+		}
+	}
+
+	return 0;
+}
+
+/* 'inline' - We have to do it fast */
+static inline void mdm_readline(char *buf, int bufsiz)
+{
+	char c;
+	char *p;
+	int n;
+
+	n = 0;
+	p = buf;
+	for(;;) {
+		c = serial_getc();
+
+		/*		dbg("(%c)", c); */
+
+		switch(c) {
+		case '\r':
+			break;
+		case '\n':
+			*p = '\0';
+			return;
+
+		default:
+			if(n++ > bufsiz) {
+				*p = '\0';
+				return; /* sanity check */
+			}
+			*p = c;
+			p++;
+			break;
+		}
+	}
+}
+#endif	/* CONFIG_MODEM_SUPPORT */