/* * (C) Copyright 2003 * 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 <command.h> #include <malloc.h> #include <devices.h> #include <version.h> #include <net.h> #include <environment.h> #if ( ((CFG_ENV_ADDR+CFG_ENV_SIZE) < CFG_MONITOR_BASE) || \ (CFG_ENV_ADDR >= (CFG_MONITOR_BASE + CFG_MONITOR_LEN)) ) || \ defined(CFG_ENV_IS_IN_NVRAM) #define TOTAL_MALLOC_LEN (CFG_MALLOC_LEN + CFG_ENV_SIZE) #else #define TOTAL_MALLOC_LEN CFG_MALLOC_LEN #endif #undef DEBUG extern int timer_init(void); extern int incaip_set_cpuclk(void); extern ulong uboot_end_data; extern ulong uboot_end; ulong monitor_flash_len; const char version_string[] = U_BOOT_VERSION" (" __DATE__ " - " __TIME__ ")"; static char *failed = "*** failed ***\n"; /* * Begin and End of memory area for malloc(), and current "brk" */ static ulong mem_malloc_start; static ulong mem_malloc_end; static ulong mem_malloc_brk; /* * The Malloc area is immediately below the monitor copy in DRAM */ static void mem_malloc_init (void) { DECLARE_GLOBAL_DATA_PTR; ulong dest_addr = CFG_MONITOR_BASE + gd->reloc_off; mem_malloc_end = dest_addr; mem_malloc_start = dest_addr - TOTAL_MALLOC_LEN; 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); } static int init_func_ram (void) { DECLARE_GLOBAL_DATA_PTR; #ifdef CONFIG_BOARD_TYPES int board_type = gd->board_type; #else int board_type = 0; /* use dummy arg */ #endif puts ("DRAM: "); if ((gd->ram_size = initdram (board_type)) > 0) { print_size (gd->ram_size, "\n"); return (0); } puts (failed); return (1); } static int display_banner(void) { printf ("\n\n%s\n\n", version_string); return (0); } static void display_flash_config(ulong size) { puts ("Flash: "); print_size (size, "\n"); } 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); } /* * Breath some life into the board... * * 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[] = { timer_init, env_init, /* initialize environment */ #ifdef CONFIG_INCA_IP incaip_set_cpuclk, /* set cpu clock according to environment variable */ #endif init_baudrate, /* initialze baudrate settings */ serial_init, /* serial communications setup */ console_init_f, display_banner, /* say that we are here */ checkboard, init_func_ram, NULL, }; void board_init_f(ulong bootflag) { DECLARE_GLOBAL_DATA_PTR; gd_t gd_data, *id; bd_t *bd; init_fnc_t **init_fnc_ptr; ulong addr, addr_sp, len = (ulong)&uboot_end - CFG_MONITOR_BASE; #ifdef CONFIG_PURPLE void copy_code (ulong); #endif /* Pointer is writable since we allocated a register for it. */ gd = &gd_data; /* compiler optimization barrier needed for GCC >= 3.4 */ __asm__ __volatile__("": : :"memory"); 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. */ addr = CFG_SDRAM_BASE + gd->ram_size; /* We can reserve some RAM "on top" here. */ /* round down to next 4 kB limit. */ addr &= ~(4096 - 1); debug ("Top of RAM usable for U-Boot at: %08lx\n", addr); /* Reserve memory for U-Boot code, data & bss * round down to next 16 kB limit */ addr -= len; addr &= ~(16 * 1024 - 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 %d Bytes for Board Info at: %08lx\n", sizeof(bd_t), addr_sp); addr_sp -= sizeof(gd_t); id = (gd_t *)addr_sp; debug ("Reserving %d Bytes for Global Data at: %08lx\n", sizeof (gd_t), addr_sp); /* Reserve memory for boot params. */ addr_sp -= CFG_BOOTPARAMS_LEN; bd->bi_boot_params = addr_sp; debug ("Reserving %dk for boot params() at: %08lx\n", CFG_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; *((ulong *) addr_sp)-- = 0; *((ulong *) addr_sp)-- = 0; debug ("Stack Pointer at: %08lx\n", addr_sp); /* * Save local variables to board info struct */ bd->bi_memstart = CFG_SDRAM_BASE; /* start of DRAM memory */ bd->bi_memsize = gd->ram_size; /* size of DRAM memory in bytes */ bd->bi_baudrate = gd->baudrate; /* Console Baudrate */ memcpy (id, (void *)gd, sizeof (gd_t)); /* On the purple board we copy the code in a special way * in order to solve flash problems */ #ifdef CONFIG_PURPLE copy_code(addr); #endif relocate_code (addr_sp, id, addr); /* NOTREACHED - relocate_code() 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) { DECLARE_GLOBAL_DATA_PTR; cmd_tbl_t *cmdtp; ulong size; extern void malloc_bin_reloc (void); #ifndef CFG_ENV_IS_NOWHERE extern char * env_name_spec; #endif char *s, *e; bd_t *bd; int i; gd = id; gd->flags |= GD_FLG_RELOC; /* tell others: relocation done */ debug ("Now running in RAM - U-Boot at: %08lx\n", dest_addr); gd->reloc_off = dest_addr - CFG_MONITOR_BASE; monitor_flash_len = (ulong)&uboot_end_data - 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 CFG_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 CFG_ENV_IS_NOWHERE env_name_spec += gd->reloc_off; #endif /* configure available FLASH banks */ size = flash_init(); display_flash_config (size); bd = gd->bd; bd->bi_flashstart = CFG_FLASH_BASE; bd->bi_flashsize = size; #if CFG_MONITOR_BASE == CFG_FLASH_BASE bd->bi_flashoffset = monitor_flash_len; /* reserved area for U-Boot */ #else bd->bi_flashoffset = 0; #endif /* initialize malloc() area */ mem_malloc_init(); malloc_bin_reloc(); /* relocate environment function pointers etc. */ env_relocate(); /* board MAC address */ s = getenv ("ethaddr"); for (i = 0; i < 6; ++i) { bd->bi_enetaddr[i] = s ? simple_strtoul (s, &e, 16) : 0; if (s) s = (*e) ? e + 1 : e; } /* IP Address */ bd->bi_ip_addr = getenv_IPaddr("ipaddr"); #if defined(CONFIG_PCI) /* * Do pci configuration */ pci_init(); #endif /** leave this here (after malloc(), environment and PCI are working) **/ /* Initialize devices */ devices_init (); jumptable_init (); /* Initialize the console (after the relocation and devices init) */ console_init_r (); /** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** **/ /* 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 */ #if defined(CONFIG_MISC_INIT_R) /* miscellaneous platform dependent initialisations */ misc_init_r (); #endif #if (CONFIG_COMMANDS & CFG_CMD_NET) && defined(CONFIG_NET_MULTI) puts ("Net: "); eth_initialize(gd->bd); #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 (;;); }