aboutsummaryrefslogtreecommitdiff
path: root/arch/m68k/lib/board.c
diff options
context:
space:
mode:
authorPeter Tyser <ptyser@xes-inc.com>2010-04-12 22:28:04 -0500
committerWolfgang Denk <wd@denx.de>2010-04-13 09:13:03 +0200
commitea0364f1bbfed1e3ea711147420875cf338fe77a (patch)
tree15c051bc4d2e94c1661c73e1b87c22c7beda7c24 /arch/m68k/lib/board.c
parent89f39e177e7b0152aa1d3152baa25d986e36cdcf (diff)
downloadu-boot-linaro-stable-ea0364f1bbfed1e3ea711147420875cf338fe77a.tar.gz
Move lib_$ARCH directories to arch/$ARCH/lib
Also move lib_$ARCH/config.mk to arch/$ARCH/config.mk This change is intended to clean up the top-level directory structure and more closely mimic Linux's directory organization. Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Diffstat (limited to 'arch/m68k/lib/board.c')
-rw-r--r--arch/m68k/lib/board.c744
1 files changed, 744 insertions, 0 deletions
diff --git a/arch/m68k/lib/board.c b/arch/m68k/lib/board.c
new file mode 100644
index 000000000..732023d67
--- /dev/null
+++ b/arch/m68k/lib/board.c
@@ -0,0 +1,744 @@
+/*
+ * (C) Copyright 2003
+ * Josef Baumgartner <josef.baumgartner@telex.de>
+ *
+ * (C) Copyright 2000-2002
+ * 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 <watchdog.h>
+#include <command.h>
+#include <malloc.h>
+#include <stdio_dev.h>
+
+#include <asm/immap.h>
+
+#if defined(CONFIG_CMD_IDE)
+#include <ide.h>
+#endif
+#if defined(CONFIG_CMD_SCSI)
+#include <scsi.h>
+#endif
+#if defined(CONFIG_CMD_KGDB)
+#include <kgdb.h>
+#endif
+#ifdef CONFIG_STATUS_LED
+#include <status_led.h>
+#endif
+#include <net.h>
+#include <serial.h>
+#if defined(CONFIG_CMD_BEDBUG)
+#include <cmd_bedbug.h>
+#endif
+#ifdef CONFIG_SYS_ALLOC_DPRAM
+#include <commproc.h>
+#endif
+#include <version.h>
+
+#if defined(CONFIG_HARD_I2C) || \
+ defined(CONFIG_SOFT_I2C)
+#include <i2c.h>
+#endif
+
+#ifdef CONFIG_CMD_SPI
+#include <spi.h>
+#endif
+
+#ifdef CONFIG_BITBANGMII
+#include <miiphy.h>
+#endif
+
+#include <nand.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static char *failed = "*** failed ***\n";
+
+#ifdef CONFIG_PCU_E
+extern flash_info_t flash_info[];
+#endif
+
+#include <environment.h>
+
+#if ( ((CONFIG_ENV_ADDR+CONFIG_ENV_SIZE) < CONFIG_SYS_MONITOR_BASE) || \
+ (CONFIG_ENV_ADDR >= (CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN)) ) || \
+ defined(CONFIG_ENV_IS_IN_NVRAM)
+#define TOTAL_MALLOC_LEN (CONFIG_SYS_MALLOC_LEN + CONFIG_ENV_SIZE)
+#else
+#define TOTAL_MALLOC_LEN CONFIG_SYS_MALLOC_LEN
+#endif
+
+extern ulong __init_end;
+extern ulong _end;
+
+extern void timer_init(void);
+
+#if defined(CONFIG_WATCHDOG)
+# define INIT_FUNC_WATCHDOG_INIT watchdog_init,
+# define WATCHDOG_DISABLE watchdog_disable
+
+extern int watchdog_init(void);
+extern int watchdog_disable(void);
+#else
+# define INIT_FUNC_WATCHDOG_INIT /* undef */
+# define WATCHDOG_DISABLE /* undef */
+#endif /* CONFIG_WATCHDOG */
+
+ulong monitor_flash_len;
+
+/************************************************************************
+ * Utilities *
+ ************************************************************************
+ */
+
+/*
+ * 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 Utilities
+ ************************************************************************
+ * Some of this code should be moved into the core functions,
+ * but let's get it working (again) first...
+ */
+
+static int init_baudrate (void)
+{
+ char 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 init_func_ram (void)
+{
+ int board_type = 0; /* use dummy arg */
+ puts ("DRAM: ");
+
+ if ((gd->ram_size = initdram (board_type)) > 0) {
+ print_size (gd->ram_size, "\n");
+ return (0);
+ }
+ puts (failed);
+ return (1);
+}
+
+/***********************************************************************/
+
+#if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
+static int init_func_i2c (void)
+{
+ puts ("I2C: ");
+ i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
+ puts ("ready\n");
+ return (0);
+}
+#endif
+
+#if defined(CONFIG_HARD_SPI)
+static int init_func_spi (void)
+{
+ puts ("SPI: ");
+ spi_init ();
+ puts ("ready\n");
+ return (0);
+}
+#endif
+
+/***********************************************************************/
+
+/************************************************************************
+ * Initialization sequence *
+ ************************************************************************
+ */
+
+init_fnc_t *init_sequence[] = {
+ get_clocks,
+ env_init,
+ init_baudrate,
+ serial_init,
+ console_init_f,
+ display_options,
+ checkcpu,
+ checkboard,
+#if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
+ init_func_i2c,
+#endif
+#if defined(CONFIG_HARD_SPI)
+ init_func_spi,
+#endif
+ init_func_ram,
+#if defined(CONFIG_SYS_DRAM_TEST)
+ testdram,
+#endif /* CONFIG_SYS_DRAM_TEST */
+ INIT_FUNC_WATCHDOG_INIT
+ NULL, /* Terminate this list */
+};
+
+
+/************************************************************************
+ *
+ * This is the first part of the initialization sequence that is
+ * implemented in C, but still running from ROM.
+ *
+ * The main purpose is to provide a (serial) console interface as
+ * soon as possible (so we can see any error messages), and to
+ * initialize the RAM so that we can relocate the monitor code to
+ * RAM.
+ *
+ * Be aware of the restrictions: global data is read-only, BSS is not
+ * initialized, and stack space is limited to a few kB.
+ *
+ ************************************************************************
+ */
+
+void
+board_init_f (ulong bootflag)
+{
+ bd_t *bd;
+ ulong len, addr, addr_sp;
+ ulong *paddr;
+ gd_t *id;
+ init_fnc_t **init_fnc_ptr;
+#ifdef CONFIG_PRAM
+ int i;
+ ulong reg;
+ char tmp[64]; /* long enough for environment variables */
+#endif
+
+ /* Pointer is writable since we allocated a register for it */
+ gd = (gd_t *) (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET);
+ /* compiler optimization barrier needed for GCC >= 3.4 */
+ __asm__ __volatile__("": : :"memory");
+
+ /* Clear initial global data */
+ memset ((void *) gd, 0, sizeof (gd_t));
+
+ for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
+ if ((*init_fnc_ptr)() != 0) {
+ hang ();
+ }
+ }
+
+ /*
+ * Now that we have DRAM mapped and working, we can
+ * relocate the code and continue running from DRAM.
+ *
+ * Reserve memory at end of RAM for (top down in that order):
+ * - protected RAM
+ * - LCD framebuffer
+ * - monitor code
+ * - board info struct
+ */
+ len = (ulong)&_end - CONFIG_SYS_MONITOR_BASE;
+
+ addr = CONFIG_SYS_SDRAM_BASE + gd->ram_size;
+
+#ifdef CONFIG_LOGBUFFER
+ /* reserve kernel log buffer */
+ addr -= (LOGBUFF_RESERVE);
+ debug ("Reserving %dk for kernel logbuffer at %08lx\n", LOGBUFF_LEN, addr);
+#endif
+
+#ifdef CONFIG_PRAM
+ /*
+ * reserve protected RAM
+ */
+ i = getenv_r ("pram", tmp, sizeof (tmp));
+ reg = (i > 0) ? simple_strtoul (tmp, NULL, 10) : CONFIG_PRAM;
+ addr -= (reg << 10); /* size is in kB */
+ debug ("Reserving %ldk for protected RAM at %08lx\n", reg, addr);
+#endif /* CONFIG_PRAM */
+
+ /* round down to next 4 kB limit */
+ addr &= ~(4096 - 1);
+ debug ("Top of RAM usable for U-Boot at: %08lx\n", addr);
+
+#ifdef CONFIG_LCD
+ /* reserve memory for LCD display (always full pages) */
+ addr = lcd_setmem (addr);
+ gd->fb_base = addr;
+#endif /* CONFIG_LCD */
+
+ /*
+ * reserve memory for U-Boot code, data & bss
+ * round down to next 4 kB limit
+ */
+ addr -= len;
+ addr &= ~(4096 - 1);
+
+ debug ("Reserving %ldk for U-Boot at: %08lx\n", len >> 10, addr);
+
+ /*
+ * reserve memory for malloc() arena
+ */
+ addr_sp = addr - TOTAL_MALLOC_LEN;
+ debug ("Reserving %dk for malloc() at: %08lx\n",
+ TOTAL_MALLOC_LEN >> 10, addr_sp);
+
+ /*
+ * (permanently) allocate a Board Info struct
+ * and a permanent copy of the "global" data
+ */
+ addr_sp -= sizeof (bd_t);
+ bd = (bd_t *) addr_sp;
+ gd->bd = bd;
+ debug ("Reserving %zu Bytes for Board Info at: %08lx\n",
+ sizeof (bd_t), addr_sp);
+ addr_sp -= sizeof (gd_t);
+ id = (gd_t *) addr_sp;
+ debug ("Reserving %zu Bytes for Global Data at: %08lx\n",
+ sizeof (gd_t), addr_sp);
+
+ /* Reserve memory for boot params. */
+ addr_sp -= CONFIG_SYS_BOOTPARAMS_LEN;
+ bd->bi_boot_params = addr_sp;
+ debug ("Reserving %dk for boot parameters at: %08lx\n",
+ CONFIG_SYS_BOOTPARAMS_LEN >> 10, addr_sp);
+
+ /*
+ * Finally, we set up a new (bigger) stack.
+ *
+ * Leave some safety gap for SP, force alignment on 16 byte boundary
+ * Clear initial stack frame
+ */
+ addr_sp -= 16;
+ addr_sp &= ~0xF;
+
+ paddr = (ulong *)addr_sp;
+ *paddr-- = 0;
+ *paddr-- = 0;
+ addr_sp = (ulong)paddr;
+
+ debug ("Stack Pointer at: %08lx\n", addr_sp);
+
+ /*
+ * Save local variables to board info struct
+ */
+ bd->bi_memstart = CONFIG_SYS_SDRAM_BASE; /* start of DRAM memory */
+ bd->bi_memsize = gd->ram_size; /* size of DRAM memory in bytes */
+#ifdef CONFIG_SYS_INIT_RAM_ADDR
+ bd->bi_sramstart = CONFIG_SYS_INIT_RAM_ADDR; /* start of SRAM memory */
+ bd->bi_sramsize = CONFIG_SYS_INIT_RAM_END; /* size of SRAM memory */
+#endif
+ bd->bi_mbar_base = CONFIG_SYS_MBAR; /* base of internal registers */
+
+ bd->bi_bootflags = bootflag; /* boot / reboot flag (for LynxOS) */
+
+ WATCHDOG_RESET ();
+ bd->bi_intfreq = gd->cpu_clk; /* Internal Freq, in Hz */
+ bd->bi_busfreq = gd->bus_clk; /* Bus Freq, in Hz */
+#ifdef CONFIG_PCI
+ bd->bi_pcifreq = gd->pci_clk; /* PCI Freq in Hz */
+#endif
+#ifdef CONFIG_EXTRA_CLOCK
+ bd->bi_inpfreq = gd->inp_clk; /* input Freq in Hz */
+ bd->bi_vcofreq = gd->vco_clk; /* vco Freq in Hz */
+ bd->bi_flbfreq = gd->flb_clk; /* flexbus Freq in Hz */
+#endif
+ bd->bi_baudrate = gd->baudrate; /* Console Baudrate */
+
+#ifdef CONFIG_SYS_EXTBDINFO
+ strncpy (bd->bi_s_version, "1.2", sizeof (bd->bi_s_version));
+ strncpy (bd->bi_r_version, U_BOOT_VERSION, sizeof (bd->bi_r_version));
+#endif
+
+ WATCHDOG_RESET ();
+
+#ifdef CONFIG_POST
+ post_bootmode_init();
+ post_run (NULL, POST_ROM | post_bootmode_get(0));
+#endif
+
+ WATCHDOG_RESET();
+
+ memcpy (id, (void *)gd, sizeof (gd_t));
+
+ debug ("Start relocate of code from %08x to %08lx\n", CONFIG_SYS_MONITOR_BASE, addr);
+ relocate_code (addr_sp, id, addr);
+
+ /* NOTREACHED - jump_to_ram() does not return */
+}
+
+/************************************************************************
+ *
+ * This is the next part if the initialization sequence: we are now
+ * running from RAM and have a "normal" C environment, i. e. global
+ * data can be written, BSS has been cleared, the stack size in not
+ * that critical any more, etc.
+ *
+ ************************************************************************
+ */
+void board_init_r (gd_t *id, ulong dest_addr)
+{
+ cmd_tbl_t *cmdtp;
+ char *s;
+ bd_t *bd;
+ extern void malloc_bin_reloc (void);
+
+#ifndef CONFIG_ENV_IS_NOWHERE
+ extern char * env_name_spec;
+#endif
+#ifndef CONFIG_SYS_NO_FLASH
+ ulong flash_size;
+#endif
+ gd = id; /* initialize RAM version of global data */
+ bd = gd->bd;
+
+ gd->flags |= GD_FLG_RELOC; /* tell others: relocation done */
+
+#ifdef CONFIG_SERIAL_MULTI
+ serial_initialize();
+#endif
+
+ debug ("Now running in RAM - U-Boot at: %08lx\n", dest_addr);
+
+ WATCHDOG_RESET ();
+
+ gd->reloc_off = dest_addr - CONFIG_SYS_MONITOR_BASE;
+
+ monitor_flash_len = (ulong)&__init_end - dest_addr;
+
+ /*
+ * We have to relocate the command table manually
+ */
+ for (cmdtp = &__u_boot_cmd_start; cmdtp != &__u_boot_cmd_end; cmdtp++) {
+ ulong addr;
+ addr = (ulong) (cmdtp->cmd) + gd->reloc_off;
+#if 0
+ printf ("Command \"%s\": 0x%08lx => 0x%08lx\n",
+ cmdtp->name, (ulong) (cmdtp->cmd), addr);
+#endif
+ cmdtp->cmd =
+ (int (*)(struct cmd_tbl_s *, int, int, char *[]))addr;
+
+ addr = (ulong)(cmdtp->name) + gd->reloc_off;
+ cmdtp->name = (char *)addr;
+
+ if (cmdtp->usage) {
+ addr = (ulong)(cmdtp->usage) + gd->reloc_off;
+ cmdtp->usage = (char *)addr;
+ }
+#ifdef CONFIG_SYS_LONGHELP
+ if (cmdtp->help) {
+ addr = (ulong)(cmdtp->help) + gd->reloc_off;
+ cmdtp->help = (char *)addr;
+ }
+#endif
+ }
+ /* there are some other pointer constants we must deal with */
+#ifndef CONFIG_ENV_IS_NOWHERE
+ env_name_spec += gd->reloc_off;
+#endif
+
+ WATCHDOG_RESET ();
+
+#ifdef CONFIG_LOGBUFFER
+ logbuff_init_ptrs ();
+#endif
+#ifdef CONFIG_POST
+ post_output_backlog ();
+ post_reloc ();
+#endif
+ WATCHDOG_RESET();
+
+#if 0
+ /* instruction cache enabled in cpu_init_f() for faster relocation */
+ icache_enable (); /* it's time to enable the instruction cache */
+#endif
+
+ /*
+ * Setup trap handlers
+ */
+ trap_init (CONFIG_SYS_SDRAM_BASE);
+
+ /* The Malloc area is immediately below the monitor copy in DRAM */
+ mem_malloc_init (CONFIG_SYS_MONITOR_BASE + gd->reloc_off -
+ TOTAL_MALLOC_LEN, TOTAL_MALLOC_LEN);
+ malloc_bin_reloc ();
+
+#if !defined(CONFIG_SYS_NO_FLASH)
+ puts ("FLASH: ");
+
+ if ((flash_size = flash_init ()) > 0) {
+# ifdef CONFIG_SYS_FLASH_CHECKSUM
+ print_size (flash_size, "");
+ /*
+ * Compute and print flash CRC if flashchecksum is set to 'y'
+ *
+ * NOTE: Maybe we should add some WATCHDOG_RESET()? XXX
+ */
+ s = getenv ("flashchecksum");
+ if (s && (*s == 'y')) {
+ printf (" CRC: %08X",
+ crc32 (0,
+ (const unsigned char *) CONFIG_SYS_FLASH_BASE,
+ flash_size)
+ );
+ }
+ putc ('\n');
+# else /* !CONFIG_SYS_FLASH_CHECKSUM */
+ print_size (flash_size, "\n");
+# endif /* CONFIG_SYS_FLASH_CHECKSUM */
+ } else {
+ puts (failed);
+ hang ();
+ }
+
+ bd->bi_flashstart = CONFIG_SYS_FLASH_BASE; /* update start of FLASH memory */
+ bd->bi_flashsize = flash_size; /* size of FLASH memory (final value) */
+ bd->bi_flashoffset = 0;
+#else /* CONFIG_SYS_NO_FLASH */
+ bd->bi_flashsize = 0;
+ bd->bi_flashstart = 0;
+ bd->bi_flashoffset = 0;
+#endif /* !CONFIG_SYS_NO_FLASH */
+
+ WATCHDOG_RESET ();
+
+ /* initialize higher level parts of CPU like time base and timers */
+ cpu_init_r ();
+
+ WATCHDOG_RESET ();
+
+#ifdef CONFIG_SPI
+# if !defined(CONFIG_ENV_IS_IN_EEPROM)
+ spi_init_f ();
+# endif
+ spi_init_r ();
+#endif
+
+ /* relocate environment function pointers etc. */
+ env_relocate ();
+
+ /*
+ * Fill in missing fields of bd_info.
+ * We do this here, where we have "normal" access to the
+ * environment; we used to do this still running from ROM,
+ * where had to use getenv_r(), which can be pretty slow when
+ * the environment is in EEPROM.
+ */
+ bd->bi_ip_addr = getenv_IPaddr ("ipaddr");
+
+ WATCHDOG_RESET ();
+
+#if defined(CONFIG_PCI)
+ /*
+ * Do pci configuration
+ */
+ pci_init ();
+#endif
+
+ /** leave this here (after malloc(), environment and PCI are working) **/
+ /* Initialize stdio devices */
+ stdio_init ();
+
+ /* Initialize the jump table for applications */
+ jumptable_init ();
+
+ /* Initialize the console (after the relocation and devices init) */
+ console_init_r ();
+
+#if defined(CONFIG_MISC_INIT_R)
+ /* miscellaneous platform dependent initialisations */
+ misc_init_r ();
+#endif
+
+#if defined(CONFIG_CMD_KGDB)
+ WATCHDOG_RESET ();
+ puts ("KGDB: ");
+ kgdb_init ();
+#endif
+
+ debug ("U-Boot relocated to %08lx\n", dest_addr);
+
+ /*
+ * Enable Interrupts
+ */
+ interrupt_init ();
+
+ /* Must happen after interrupts are initialized since
+ * an irq handler gets installed
+ */
+ timer_init();
+
+#ifdef CONFIG_SERIAL_SOFTWARE_FIFO
+ serial_buffered_init();
+#endif
+
+#ifdef CONFIG_STATUS_LED
+ status_led_set (STATUS_LED_BOOT, STATUS_LED_BLINKING);
+#endif
+
+ udelay (20);
+
+ set_timer (0);
+
+ /* Insert function pointers now that we have relocated the code */
+
+ /* Initialize from environment */
+ if ((s = getenv ("loadaddr")) != NULL) {
+ load_addr = simple_strtoul (s, NULL, 16);
+ }
+#if defined(CONFIG_CMD_NET)
+ if ((s = getenv ("bootfile")) != NULL) {
+ copy_filename (BootFile, s, sizeof (BootFile));
+ }
+#endif
+
+ WATCHDOG_RESET ();
+
+#if defined(CONFIG_CMD_DOC)
+ WATCHDOG_RESET ();
+ puts ("DOC: ");
+ doc_init ();
+#endif
+
+#if defined(CONFIG_CMD_NAND)
+ WATCHDOG_RESET ();
+ puts ("NAND: ");
+ nand_init(); /* go init the NAND */
+#endif
+
+#ifdef CONFIG_BITBANGMII
+ bb_miiphy_init();
+#endif
+#if defined(CONFIG_CMD_NET)
+ WATCHDOG_RESET();
+#if defined(FEC_ENET)
+ eth_init(bd);
+#endif
+#if defined(CONFIG_NET_MULTI)
+ puts ("Net: ");
+ eth_initialize (bd);
+#endif
+#endif
+
+#ifdef CONFIG_POST
+ post_run (NULL, POST_RAM | post_bootmode_get(0));
+#endif
+
+#if defined(CONFIG_CMD_PCMCIA) \
+ && !defined(CONFIG_CMD_IDE)
+ WATCHDOG_RESET ();
+ puts ("PCMCIA:");
+ pcmcia_init ();
+#endif
+
+#if defined(CONFIG_CMD_IDE)
+ WATCHDOG_RESET ();
+ puts ("IDE: ");
+ ide_init ();
+#endif
+
+#ifdef CONFIG_LAST_STAGE_INIT
+ WATCHDOG_RESET ();
+ /*
+ * Some parts can be only initialized if all others (like
+ * Interrupts) are up and running (i.e. the PC-style ISA
+ * keyboard).
+ */
+ last_stage_init ();
+#endif
+
+#if defined(CONFIG_CMD_BEDBUG)
+ WATCHDOG_RESET ();
+ bedbug_init ();
+#endif
+
+#if defined(CONFIG_PRAM) || defined(CONFIG_LOGBUFFER)
+ /*
+ * Export available size of memory for Linux,
+ * taking into account the protected RAM at top of memory
+ */
+ {
+ ulong pram;
+ char memsz[32];
+#ifdef CONFIG_PRAM
+ char *s;
+
+ if ((s = getenv ("pram")) != NULL) {
+ pram = simple_strtoul (s, NULL, 10);
+ } else {
+ pram = CONFIG_PRAM;
+ }
+#else
+ pram=0;
+#endif
+#ifdef CONFIG_LOGBUFFER
+ /* Also take the logbuffer into account (pram is in kB) */
+ pram += (LOGBUFF_LEN+LOGBUFF_OVERHEAD)/1024;
+#endif
+ sprintf (memsz, "%ldk", (bd->bi_memsize / 1024) - pram);
+ setenv ("mem", memsz);
+ }
+#endif
+
+#ifdef CONFIG_MODEM_SUPPORT
+ {
+ extern int do_mdm_init;
+ do_mdm_init = gd->do_mdm_init;
+ }
+#endif
+
+#ifdef CONFIG_WATCHDOG
+ /* disable watchdog if environment is set */
+ if ((s = getenv ("watchdog")) != NULL) {
+ if (strncmp (s, "off", 3) == 0) {
+ WATCHDOG_DISABLE ();
+ }
+ }
+#endif /* CONFIG_WATCHDOG*/
+
+
+ /* Initialization complete - start the monitor */
+
+ /* main_loop() can return to retry autoboot, if so just run it again. */
+ for (;;) {
+ WATCHDOG_RESET ();
+ main_loop ();
+ }
+
+ /* NOTREACHED - no way out of command loop except booting */
+}
+
+
+void hang(void)
+{
+ puts ("### ERROR ### Please RESET the board ###\n");
+ for (;;);
+}