/* * (C) Copyright 2007 Michal Simek * (C) Copyright 2004 Atmark Techno, Inc. * * Michal SIMEK <monstr@monstr.eu> * Yasushi SHOJI <yashi@atmark-techno.com> * * 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 <version.h> #include <watchdog.h> DECLARE_GLOBAL_DATA_PTR; const char version_string[] = U_BOOT_VERSION " (" __DATE__ " - " __TIME__ ")"; #ifdef CFG_GPIO_0 extern int gpio_init (void); #endif #ifdef CFG_INTC_0 extern int interrupts_init (void); #endif #if defined(CONFIG_CMD_NET) extern int eth_init (bd_t * bis); extern int getenv_IPaddr (char *); #endif /* * 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 * aka CFG_MONITOR_BASE - Note there is no need for reloc_off * as our monitory code is run from SDRAM */ static void mem_malloc_init (void) { mem_malloc_end = (CFG_MALLOC_BASE + CFG_MALLOC_LEN); mem_malloc_start = CFG_MALLOC_BASE; 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); } /* * 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[] = { env_init, serial_init, #ifdef CFG_GPIO_0 gpio_init, #endif #ifdef CFG_INTC_0 interrupts_init, #endif NULL, }; void board_init (void) { bd_t *bd; init_fnc_t **init_fnc_ptr; gd = (gd_t *) CFG_GBL_DATA_OFFSET; #if defined(CONFIG_CMD_FLASH) ulong flash_size = 0; #endif asm ("nop"); /* FIXME gd is not initialize - wait */ memset ((void *)gd, 0, CFG_GBL_DATA_SIZE); gd->bd = (bd_t *) (gd + 1); /* At end of global data */ gd->baudrate = CONFIG_BAUDRATE; bd = gd->bd; bd->bi_baudrate = CONFIG_BAUDRATE; bd->bi_memstart = CFG_SDRAM_BASE; bd->bi_memsize = CFG_SDRAM_SIZE; /* Initialise malloc() area */ mem_malloc_init (); for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) { WATCHDOG_RESET (); if ((*init_fnc_ptr) () != 0) { hang (); } } #if defined(CONFIG_CMD_FLASH) bd->bi_flashstart = CFG_FLASH_BASE; if (0 < (flash_size = flash_init ())) { bd->bi_flashsize = flash_size; bd->bi_flashoffset = CFG_FLASH_BASE + flash_size; } else { puts ("Flash init FAILED"); bd->bi_flashstart = 0; bd->bi_flashsize = 0; bd->bi_flashoffset = 0; } #endif #if defined(CONFIG_CMD_NET) char *s, *e; int i; /* 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"); eth_init (bd); #endif /* relocate environment function pointers etc. */ env_relocate (); /* main_loop */ for (;;) { WATCHDOG_RESET (); main_loop (); } } void hang (void) { puts ("### ERROR ### Please RESET the board ###\n"); for (;;) ; }