176 lines
4.4 KiB
C
176 lines
4.4 KiB
C
/*
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* (C) Copyright 2007 Michal Simek
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* (C) Copyright 2004 Atmark Techno, Inc.
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*
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* Michal SIMEK <monstr@monstr.eu>
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* Yasushi SHOJI <yashi@atmark-techno.com>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <command.h>
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#include <malloc.h>
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#include <version.h>
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#include <watchdog.h>
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DECLARE_GLOBAL_DATA_PTR;
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const char version_string[] = U_BOOT_VERSION " (" __DATE__ " - " __TIME__ ")";
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#ifdef CFG_GPIO_0
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extern int gpio_init (void);
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#endif
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#ifdef CFG_INTC_0
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extern int interrupts_init (void);
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#endif
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#if defined(CONFIG_CMD_NET)
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extern int eth_init (bd_t * bis);
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extern int getenv_IPaddr (char *);
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#endif
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/*
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* Begin and End of memory area for malloc(), and current "brk"
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*/
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static ulong mem_malloc_start;
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static ulong mem_malloc_end;
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static ulong mem_malloc_brk;
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/*
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* The Malloc area is immediately below the monitor copy in DRAM
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* aka CFG_MONITOR_BASE - Note there is no need for reloc_off
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* as our monitory code is run from SDRAM
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*/
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static void mem_malloc_init (void)
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{
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mem_malloc_end = (CFG_MALLOC_BASE + CFG_MALLOC_LEN);
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mem_malloc_start = CFG_MALLOC_BASE;
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mem_malloc_brk = mem_malloc_start;
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memset ((void *)mem_malloc_start, 0, mem_malloc_end - mem_malloc_start);
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}
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void *sbrk (ptrdiff_t increment)
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{
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ulong old = mem_malloc_brk;
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ulong new = old + increment;
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if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
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return (NULL);
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}
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mem_malloc_brk = new;
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return ((void *)old);
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}
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/*
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* All attempts to come up with a "common" initialization sequence
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* that works for all boards and architectures failed: some of the
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* requirements are just _too_ different. To get rid of the resulting
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* mess of board dependend #ifdef'ed code we now make the whole
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* initialization sequence configurable to the user.
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*
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* The requirements for any new initalization function is simple: it
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* receives a pointer to the "global data" structure as it's only
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* argument, and returns an integer return code, where 0 means
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* "continue" and != 0 means "fatal error, hang the system".
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*/
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typedef int (init_fnc_t) (void);
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init_fnc_t *init_sequence[] = {
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env_init,
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serial_init,
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#ifdef CFG_GPIO_0
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gpio_init,
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#endif
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#ifdef CFG_INTC_0
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interrupts_init,
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#endif
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NULL,
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};
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void board_init (void)
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{
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bd_t *bd;
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init_fnc_t **init_fnc_ptr;
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gd = (gd_t *) CFG_GBL_DATA_OFFSET;
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#if defined(CONFIG_CMD_FLASH)
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ulong flash_size = 0;
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#endif
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asm ("nop"); /* FIXME gd is not initialize - wait */
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memset ((void *)gd, 0, CFG_GBL_DATA_SIZE);
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gd->bd = (bd_t *) (gd + 1); /* At end of global data */
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gd->baudrate = CONFIG_BAUDRATE;
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bd = gd->bd;
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bd->bi_baudrate = CONFIG_BAUDRATE;
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bd->bi_memstart = CFG_SDRAM_BASE;
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bd->bi_memsize = CFG_SDRAM_SIZE;
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/* Initialise malloc() area */
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mem_malloc_init ();
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for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
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WATCHDOG_RESET ();
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if ((*init_fnc_ptr) () != 0) {
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hang ();
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}
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}
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#if defined(CONFIG_CMD_FLASH)
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bd->bi_flashstart = CFG_FLASH_BASE;
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if (0 < (flash_size = flash_init ())) {
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bd->bi_flashsize = flash_size;
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bd->bi_flashoffset = CFG_FLASH_BASE + flash_size;
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} else {
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puts ("Flash init FAILED");
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bd->bi_flashstart = 0;
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bd->bi_flashsize = 0;
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bd->bi_flashoffset = 0;
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}
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#endif
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#if defined(CONFIG_CMD_NET)
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char *s, *e;
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int i;
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/* board MAC address */
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s = getenv ("ethaddr");
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for (i = 0; i < 6; ++i) {
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bd->bi_enetaddr[i] = s ? simple_strtoul (s, &e, 16) : 0;
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if (s)
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s = (*e) ? e + 1 : e;
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}
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/* IP Address */
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bd->bi_ip_addr = getenv_IPaddr ("ipaddr");
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eth_init (bd);
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#endif
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/* relocate environment function pointers etc. */
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env_relocate ();
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/* main_loop */
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for (;;) {
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WATCHDOG_RESET ();
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main_loop ();
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}
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}
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void hang (void)
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{
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puts ("### ERROR ### Please RESET the board ###\n");
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for (;;) ;
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}
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