/* * (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 <devices.h> #include <version.h> #include <malloc.h> #include <net.h> #include <ide.h> #include <asm/u-boot-i386.h> extern long _i386boot_start; extern long _i386boot_end; extern long _i386boot_romdata_start; extern long _i386boot_romdata_dest; extern long _i386boot_romdata_size; extern long _i386boot_bss_start; extern long _i386boot_bss_size; extern long _i386boot_realmode; extern long _i386boot_realmode_size; extern long _i386boot_bios; extern long _i386boot_bios_size; /* The symbols defined by the linker script becomes pointers * which is somewhat inconveient ... */ ulong i386boot_start = (ulong)&_i386boot_start; /* code start (in flash) defined in start.S */ ulong i386boot_end = (ulong)&_i386boot_end; /* code end (in flash) */ ulong i386boot_romdata_start = (ulong)&_i386boot_romdata_start; /* datasegment in flash (also code+rodata end) */ ulong i386boot_romdata_dest = (ulong)&_i386boot_romdata_dest; /* data location segment in ram */ ulong i386boot_romdata_size = (ulong)&_i386boot_romdata_size; /* size of data segment */ ulong i386boot_bss_start = (ulong)&_i386boot_bss_start; /* bss start */ ulong i386boot_bss_size = (ulong)&_i386boot_bss_size; /* bss size */ ulong i386boot_realmode = (ulong)&_i386boot_realmode; /* start of realmode entry code */ ulong i386boot_realmode_size = (ulong)&_i386boot_realmode_size; /* size of realmode entry code */ ulong i386boot_bios = (ulong)&_i386boot_bios; /* start of BIOS emulation code */ ulong i386boot_bios_size = (ulong)&_i386boot_bios_size; /* size of BIOS emulation code */ const char version_string[] = U_BOOT_VERSION" (" __DATE__ " - " __TIME__ ")"; /* * 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 int mem_malloc_init(void) { DECLARE_GLOBAL_DATA_PTR; /* start malloc area right after the stack */ mem_malloc_start = i386boot_bss_start + i386boot_bss_size + CFG_STACK_SIZE; mem_malloc_start = (mem_malloc_start+3)&~3; /* Use all available RAM for malloc() */ mem_malloc_end = gd->ram_size; mem_malloc_brk = mem_malloc_start; return 0; } 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); } char *strmhz (char *buf, long hz) { long l, n; long m; n = hz / 1000000L; l = sprintf (buf, "%ld", n); m = (hz % 1000000L) / 1000L; if (m != 0) sprintf (buf + l, ".%03ld", m); return (buf); } /************************************************************************ * 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; 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+CFG_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) { 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 */ dram_init, /* configure available RAM banks */ mem_malloc_init, /* dependant on dram_init */ interrupt_init, /* set up exceptions */ timer_init, serial_init, env_init, /* initialize environment */ init_baudrate, /* initialze baudrate settings */ serial_init, /* serial communications setup */ display_banner, display_dram_config, NULL, }; gd_t *global_data; void start_i386boot (void) { DECLARE_GLOBAL_DATA_PTR; char *s; int i; ulong size; static gd_t gd_data; static bd_t bd_data; init_fnc_t **init_fnc_ptr; show_boot_progress(0x21); gd = global_data = &gd_data; /* 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; 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"); /* 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_PCI) /* * Do pci configuration */ pci_init(); #endif show_boot_progress(0x27); devices_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 (CONFIG_COMMANDS & CFG_CMD_NET) && (0) WATCHDOG_RESET(); # ifdef DEBUG puts ("Reset Ethernet PHY\n"); # endif reset_phy(); #endif #if (CONFIG_COMMANDS & CFG_CMD_PCMCIA) && !(CONFIG_COMMANDS & CFG_CMD_IDE) WATCHDOG_RESET(); puts ("PCMCIA:"); pcmcia_init(); #endif #if (CONFIG_COMMANDS & CFG_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 (CONFIG_COMMANDS & CFG_CMD_NET) if ((s = getenv ("bootfile")) != NULL) { copy_filename (BootFile, s, sizeof (BootFile)); } #endif /* CFG_CMD_NET */ WATCHDOG_RESET(); #if (CONFIG_COMMANDS & CFG_CMD_IDE) WATCHDOG_RESET(); puts("IDE: "); ide_init(); #endif /* CFG_CMD_IDE */ #if (CONFIG_COMMANDS & CFG_CMD_SCSI) WATCHDOG_RESET(); puts("SCSI: "); scsi_init(); #endif #if (CONFIG_COMMANDS & CFG_CMD_DOC) WATCHDOG_RESET(); puts("DOC: "); doc_init(); #endif #if (CONFIG_COMMANDS & CFG_CMD_NET) && defined(CONFIG_NET_MULTI) WATCHDOG_RESET(); puts("Net: "); eth_initialize(gd->bd); #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 (;;); }