/* * (C) Copyright 2004 Atmark Techno, Inc. * * 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__ ")"; /* * 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; 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[] = { serial_init, /* serial communications setup */ NULL, }; void board_init(void) { bd_t *bd; init_fnc_t **init_fnc_ptr; /* Pointer is writable since we allocated a register for it. */ gd = (gd_t *)CFG_GBL_DATA_OFFSET; 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; for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) { WATCHDOG_RESET (); if ((*init_fnc_ptr) () != 0) { hang (); } } /* main_loop */ for (;;) { WATCHDOG_RESET (); main_loop (); } } void hang (void) { puts ("### ERROR ### Please RESET the board ###\n"); for (;;); }