2007-07-05 16:01:14 +00:00
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/*
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* (C) Copyright 2002-2006
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* (C) Copyright 2002
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* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Marius Groeger <mgroeger@sysgo.de>
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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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/*
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* To match the U-Boot user interface on ARM platforms to the U-Boot
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* standard (as on PPC platforms), some messages with debug character
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* are removed from the default U-Boot build.
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*
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* Define DEBUG here if you want additional info as shown below
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* printed upon startup:
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*
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* U-Boot code: 00F00000 -> 00F3C774 BSS: -> 00FC3274
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* IRQ Stack: 00ebff7c
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* FIQ Stack: 00ebef7c
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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 <devices.h>
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#include <version.h>
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#include <net.h>
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DECLARE_GLOBAL_DATA_PTR;
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#if (CONFIG_COMMANDS & CFG_CMD_NAND)
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void nand_init (void);
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#endif
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ulong monitor_flash_len;
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#ifndef CONFIG_IDENT_STRING
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#define CONFIG_IDENT_STRING ""
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#endif
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const char version_string[] =
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U_BOOT_VERSION" (" __DATE__ " - " __TIME__ ")"CONFIG_IDENT_STRING;
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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 = 0;
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static ulong mem_malloc_end = 0;
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static ulong mem_malloc_brk = 0;
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static
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void mem_malloc_init (ulong dest_addr)
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{
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mem_malloc_start = dest_addr;
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mem_malloc_end = dest_addr + CFG_MALLOC_LEN;
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mem_malloc_brk = mem_malloc_start;
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memset ((void *) mem_malloc_start, 0,
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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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* Init Utilities *
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************************************************************************
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* Some of this code should be moved into the core functions,
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* or dropped completely,
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* but let's get it working (again) first...
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*/
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static int init_baudrate (void)
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{
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char tmp[64]; /* long enough for environment variables */
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int i = getenv_r ("baudrate", tmp, sizeof (tmp));
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gd->bd->bi_baudrate = gd->baudrate = (i > 0)
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? (int) simple_strtoul (tmp, NULL, 10)
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: CONFIG_BAUDRATE;
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return (0);
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}
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static int display_banner (void)
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{
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printf ("\n\n%s\n\n", version_string);
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debug ("U-Boot code: %08lX -> %08lX BSS: -> %08lX\n",
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_armboot_start, _bss_start, _bss_end);
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#ifdef CONFIG_USE_IRQ
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debug ("IRQ Stack: %08lx\n", IRQ_STACK_START);
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debug ("FIQ Stack: %08lx\n", FIQ_STACK_START);
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#endif
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return (0);
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}
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/*
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* WARNING: this code looks "cleaner" than the PowerPC version, but
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* has the disadvantage that you either get nothing, or everything.
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* On PowerPC, you might see "DRAM: " before the system hangs - which
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* gives a simple yet clear indication which part of the
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* initialization if failing.
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*/
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static int display_dram_config (void)
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{
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int i;
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puts ("RAM Configuration:\n");
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for(i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
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2007-07-05 16:01:21 +00:00
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printf ("Bank #%d: 0x%08lx ", i, gd->bd->bi_dram[i].start);
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2007-07-05 16:01:14 +00:00
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print_size (gd->bd->bi_dram[i].size, "\n");
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}
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return (0);
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}
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#ifndef CFG_NO_FLASH
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2007-07-05 16:01:21 +00:00
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extern flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
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2007-07-05 16:01:14 +00:00
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static void display_flash_config (ulong size)
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{
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2007-07-05 16:01:21 +00:00
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int i;
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puts ("Flash Configuration:\n");
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for(i=0; i<CFG_MAX_FLASH_BANKS; i++) {
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printf ("Bank #%d: 0x%08lx ", i, flash_info[i].start[0]);
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print_size (flash_info[i].size, "\n");
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}
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2007-07-05 16:01:14 +00:00
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}
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#endif /* CFG_NO_FLASH */
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/*
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* Breathe some life into the board...
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*
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* Initialize a serial port as console, and carry out some hardware
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* tests.
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*
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* The first part of initialization is running from Flash memory;
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* its main purpose is to initialize the RAM so that we
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* can relocate the monitor code to RAM.
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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 dependent #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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int print_cpuinfo (void); /* test-only */
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init_fnc_t *init_sequence[] = {
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cpu_init, /* basic cpu dependent setup */
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board_init, /* basic board dependent setup */
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interrupt_init, /* set up exceptions */
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env_init, /* initialize environment */
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init_baudrate, /* initialze baudrate settings */
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serial_init, /* serial communications setup */
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console_init_f, /* stage 1 init of console */
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display_banner, /* say that we are here */
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#if defined(CONFIG_DISPLAY_CPUINFO)
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print_cpuinfo, /* display cpu info (and speed) */
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#endif
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#if defined(CONFIG_DISPLAY_BOARDINFO)
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checkboard, /* display board info */
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#endif
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dram_init, /* configure available RAM banks */
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display_dram_config,
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NULL,
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};
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void start_armboot (void)
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{
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init_fnc_t **init_fnc_ptr;
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char *s;
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#ifndef CFG_NO_FLASH
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ulong size;
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#endif
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#if defined(CONFIG_VFD) || defined(CONFIG_LCD)
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unsigned long addr;
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#endif
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/* Pointer is writable since we allocated a register for it */
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gd = (gd_t*)(_armboot_start - CFG_MALLOC_LEN - sizeof(gd_t));
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/* compiler optimization barrier needed for GCC >= 3.4 */
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__asm__ __volatile__("": : :"memory");
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memset ((void*)gd, 0, sizeof (gd_t));
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gd->bd = (bd_t*)((char*)gd - sizeof(bd_t));
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memset (gd->bd, 0, sizeof (bd_t));
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monitor_flash_len = _bss_start - _armboot_start;
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for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
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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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#ifndef CFG_NO_FLASH
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/* configure available FLASH banks */
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size = flash_init ();
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display_flash_config (size);
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#endif /* CFG_NO_FLASH */
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#ifdef CONFIG_VFD
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# ifndef PAGE_SIZE
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# define PAGE_SIZE 4096
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# endif
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/*
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* reserve memory for VFD display (always full pages)
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*/
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/* bss_end is defined in the board-specific linker script */
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addr = (_bss_end + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
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size = vfd_setmem (addr);
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gd->fb_base = addr;
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#endif /* CONFIG_VFD */
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#ifdef CONFIG_LCD
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# ifndef PAGE_SIZE
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# define PAGE_SIZE 4096
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# endif
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/*
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* reserve memory for LCD display (always full pages)
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*/
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/* bss_end is defined in the board-specific linker script */
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addr = (_bss_end + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
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size = lcd_setmem (addr);
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gd->fb_base = addr;
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#endif /* CONFIG_LCD */
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/* armboot_start is defined in the board-specific linker script */
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mem_malloc_init (_armboot_start - CFG_MALLOC_LEN);
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#if (CONFIG_COMMANDS & CFG_CMD_NAND)
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puts ("NAND: ");
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nand_init(); /* go init the NAND */
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#endif
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/* initialize environment */
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env_relocate ();
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#ifdef CONFIG_VFD
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/* must do this after the framebuffer is allocated */
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drv_vfd_init();
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#endif /* CONFIG_VFD */
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devices_init (); /* get the devices list going. */
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jumptable_init ();
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console_init_r (); /* fully init console as a device */
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#if defined(CONFIG_MISC_INIT_R)
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/* miscellaneous platform dependent initialisations */
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misc_init_r ();
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#endif
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/* enable exceptions */
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enable_interrupts ();
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#ifdef BOARD_LATE_INIT
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board_late_init ();
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#endif
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#if (CONFIG_COMMANDS & CFG_CMD_NET)
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#if defined(CONFIG_NET_MULTI)
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puts ("Net: ");
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#endif
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eth_initialize(gd->bd);
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#endif
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/* main_loop() can return to retry autoboot, if so just run it again. */
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for (;;) {
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main_loop ();
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}
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/* NOTREACHED - no way out of command loop except booting */
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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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