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+/*
+ * (C) Copyright 2002
+ * Daniel Engstr�m, Omicron Ceti AB, daniel@omicron.se
+ *
+ * (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 <watchdog.h>
+#include <command.h>
+#include <stdio_dev.h>
+#include <timestamp.h>
+#include <version.h>
+#include <malloc.h>
+#include <net.h>
+#include <ide.h>
+#include <asm/u-boot-i386.h>
+#include <elf.h>
+
+#ifdef CONFIG_BITBANGMII
+#include <miiphy.h>
+#endif
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/* Exports from the Linker Script */
+extern ulong _i386boot_text_start;
+extern ulong _i386boot_rel_dyn_start;
+extern ulong _i386boot_rel_dyn_end;
+extern ulong _i386boot_bss_start;
+extern ulong _i386boot_bss_size;
+void ram_bootstrap (void *);
+const char version_string[] =
+ U_BOOT_VERSION" (" U_BOOT_DATE " - " U_BOOT_TIME ")";
+
+/************************************************************************
+ * 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)
+{
+ char tmp[64]; /* long enough for environment variables */
+ int i = getenv_r("baudrate", tmp, 64);
+
+ 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 data: %08lX -> %08lX\n"
+ " BSS: %08lX -> %08lX stack: %08lX -> %08lX\n",
+ i386boot_start, i386boot_romdata_start-1,
+ i386boot_romdata_dest, i386boot_romdata_dest+i386boot_romdata_size-1,
+ i386boot_bss_start, i386boot_bss_start+i386boot_bss_size-1,
+ i386boot_bss_start+i386boot_bss_size,
+ i386boot_bss_start+i386boot_bss_size+CONFIG_SYS_STACK_SIZE-1);
+
+*/
+
+ 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)
+{
+ 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[] = {
+ serial_init,
+ cpu_init_r, /* basic cpu dependent setup */
+ board_early_init_r, /* basic board dependent setup */
+ dram_init, /* configure available RAM banks */
+ interrupt_init, /* set up exceptions */
+ timer_init,
+ env_init, /* initialize environment */
+ init_baudrate, /* initialze baudrate settings */
+ serial_init, /* serial communications setup */
+ display_banner,
+ display_dram_config,
+
+ NULL,
+};
+
+gd_t *gd;
+
+/*
+ * Load U-Boot into RAM, initialize BSS, perform relocation adjustments
+ */
+void board_init_f (ulong stack_limit)
+{
+ void *text_start = &_i386boot_text_start;
+ void *u_boot_cmd_end = &__u_boot_cmd_end;
+ Elf32_Rel *rel_dyn_start = (Elf32_Rel *)&_i386boot_rel_dyn_start;
+ Elf32_Rel *rel_dyn_end = (Elf32_Rel *)&_i386boot_rel_dyn_end;
+ void *bss_start = &_i386boot_bss_start;
+ void *bss_size = &_i386boot_bss_size;
+
+ size_t uboot_size;
+ void *ram_start;
+ ulong rel_offset;
+ Elf32_Rel *re;
+
+ void (*start_func)(void *);
+
+ /* compiler optimization barrier needed for GCC >= 3.4 */
+ __asm__ __volatile__("": : :"memory");
+
+ uboot_size = (size_t)u_boot_cmd_end - (size_t)text_start;
+ ram_start = (void *)stack_limit - (uboot_size + (ulong)bss_size);
+ rel_offset = text_start - ram_start;
+ start_func = ram_bootstrap - rel_offset;
+
+ /* First stage CPU initialization */
+ if (cpu_init_f() != 0)
+ hang();
+
+ /* First stage Board initialization */
+ if (board_early_init_f() != 0)
+ hang();
+
+ /* Copy U-Boot into RAM */
+ memcpy(ram_start, text_start, (size_t)uboot_size);
+
+ /* Clear BSS */
+ memset(bss_start - rel_offset, 0, (size_t)bss_size);
+
+ /* Perform relocation adjustments */
+ for (re = rel_dyn_start; re < rel_dyn_end; re++)
+ {
+ if (re->r_offset >= TEXT_BASE)
+ if (*(ulong *)re->r_offset >= TEXT_BASE)
+ *(ulong *)(re->r_offset - rel_offset) -= (Elf32_Addr)rel_offset;
+ }
+
+ start_func(ram_start);
+
+ /* NOTREACHED - relocate_code() does not return */
+ while(1);
+}
+
+/*
+ * All attempts to jump straight from board_init_f() to board_init_r()
+ * have failed, hence this special 'bootstrap' function.
+ */
+void ram_bootstrap (void *ram_start)
+{
+ static gd_t gd_data;
+
+ /* compiler optimization barrier needed for GCC >= 3.4 */
+ __asm__ __volatile__("": : :"memory");
+
+ board_init_r(&gd_data, (ulong)ram_start);
+}
+
+void board_init_r(gd_t *id, ulong ram_start)
+{
+ char *s;
+ int i;
+ ulong size;
+ static bd_t bd_data;
+ init_fnc_t **init_fnc_ptr;
+
+ show_boot_progress(0x21);
+
+ gd = id;
+ /* compiler optimization barrier needed for GCC >= 3.4 */
+ __asm__ __volatile__("": : :"memory");
+
+ memset (gd, 0, sizeof (gd_t));
+ gd->bd = &bd_data;
+ memset (gd->bd, 0, sizeof (bd_t));
+ show_boot_progress(0x22);
+
+ gd->baudrate = CONFIG_BAUDRATE;
+
+ gd->flags |= GD_FLG_RELOC; /* tell others: relocation done */
+
+ mem_malloc_init((((ulong)ram_start - CONFIG_SYS_MALLOC_LEN)+3)&~3,
+ CONFIG_SYS_MALLOC_LEN);
+
+ for (init_fnc_ptr = init_sequence, i=0; *init_fnc_ptr; ++init_fnc_ptr, i++) {
+ show_boot_progress(0xa130|i);
+
+ if ((*init_fnc_ptr)() != 0) {
+ hang ();
+ }
+ }
+ show_boot_progress(0x23);
+
+ /* configure available FLASH banks */
+ size = flash_init();
+ display_flash_config(size);
+ show_boot_progress(0x24);
+
+ show_boot_progress(0x25);
+
+ /* initialize environment */
+ env_relocate ();
+ show_boot_progress(0x26);
+
+
+ /* IP Address */
+ bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");
+
+#if defined(CONFIG_PCI)
+ /*
+ * Do pci configuration
+ */
+ pci_init();
+#endif
+
+ show_boot_progress(0x27);
+
+
+ stdio_init ();
+
+ jumptable_init ();
+
+ /* Initialize the console (after the relocation and devices init) */
+ console_init_r();
+
+#ifdef CONFIG_MISC_INIT_R
+ /* miscellaneous platform dependent initialisations */
+ misc_init_r();
+#endif
+
+#if defined(CONFIG_CMD_PCMCIA) && !defined(CONFIG_CMD_IDE)
+ WATCHDOG_RESET();
+ puts ("PCMCIA:");
+ pcmcia_init();
+#endif
+
+#if defined(CONFIG_CMD_KGDB)
+ WATCHDOG_RESET();
+ puts("KGDB: ");
+ kgdb_init();
+#endif
+
+ /* enable exceptions */
+ enable_interrupts();
+ show_boot_progress(0x28);
+
+ /* Must happen after interrupts are initialized since
+ * an irq handler gets installed
+ */
+#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);
+
+ /* 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_IDE)
+ WATCHDOG_RESET();
+ puts("IDE: ");
+ ide_init();
+#endif
+
+#if defined(CONFIG_CMD_SCSI)
+ WATCHDOG_RESET();
+ puts("SCSI: ");
+ scsi_init();
+#endif
+
+#if defined(CONFIG_CMD_DOC)
+ WATCHDOG_RESET();
+ puts("DOC: ");
+ doc_init();
+#endif
+
+#ifdef CONFIG_BITBANGMII
+ bb_miiphy_init();
+#endif
+#if defined(CONFIG_CMD_NET)
+#if defined(CONFIG_NET_MULTI)
+ WATCHDOG_RESET();
+ puts("Net: ");
+#endif
+ eth_initialize(gd->bd);
+#endif
+
+#if ( defined(CONFIG_CMD_NET)) && (0)
+ WATCHDOG_RESET();
+# ifdef DEBUG
+ puts ("Reset Ethernet PHY\n");
+# endif
+ reset_phy();
+#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
+
+
+#ifdef CONFIG_POST
+ post_run (NULL, POST_RAM | post_bootmode_get(0));
+#endif
+
+
+ show_boot_progress(0x29);
+
+ /* 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 (;;);
+}
+
+unsigned long do_go_exec (ulong (*entry)(int, char *[]), int argc, char *argv[])
+{
+ /*
+ * TODO: Test this function - changed to fix compiler error.
+ * Original code was:
+ * return (entry >> 1) (argc, argv);
+ * with a comment about Nios function pointers are address >> 1
+ */
+ return (entry) (argc, argv);
+}