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Diffstat (limited to 'lib_i386/board.c')
| -rw-r--r-- | lib_i386/board.c | 448 |
1 files changed, 448 insertions, 0 deletions
diff --git a/lib_i386/board.c b/lib_i386/board.c new file mode 100644 index 000000000..193860a87 --- /dev/null +++ b/lib_i386/board.c @@ -0,0 +1,448 @@ +/* + * (C) Copyright 2002 + * Daniel Engström, 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 <syscall.h> +#include <net.h> +#include <ide.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; + +#if 1 + /* 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; +#else + mem_malloc_start = 0x400000; +#endif +#if 1 + /* Use all available RAM for malloc() */ + mem_malloc_end = gd->ram_size; +#else + /* Use only CONFIG_MALLOC_SIZE bytes of RAM for malloc() */ + mem_malloc_end = mem_malloc_start + CONFIG_MALLOC_SIZE; +#endif + 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 void syscalls_init (void) +{ + syscall_tbl[SYSCALL_MALLOC] = (void *) malloc; + syscall_tbl[SYSCALL_FREE] = (void *) free; + + syscall_tbl[SYSCALL_INSTALL_HDLR] = (void *) irq_install_handler; + syscall_tbl[SYSCALL_FREE_HDLR] = (void *) irq_free_handler; + +} + +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 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, + 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; + + memset (gd, 0, sizeof (gd_t)); + gd->bd = &bd_data; + memset (gd->bd, 0, sizeof (bd_t)); + show_boot_progress(0x22); + + + 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 (); + + /* allocate syscalls table (console_init_r will fill it in */ + syscall_tbl = (void **) malloc (NR_SYSCALLS * sizeof (void *)); + + /* Initialize the console (after the relocation and devices init) */ + console_init_r(); + syscalls_init(); + +#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)); + if (post_bootmode_get(0) & POST_POWERFAIL) { + post_bootmode_clear(); + board_poweroff(); + } +#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 (;;); +} + + |