433 lines
10 KiB
C
433 lines
10 KiB
C
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/*
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* (C) Copyright 2003
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* Wolfgang Denk, DENX Software Engineering, wd@denx.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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#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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#include <environment.h>
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DECLARE_GLOBAL_DATA_PTR;
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#if ( ((CFG_ENV_ADDR+CFG_ENV_SIZE) < CFG_MONITOR_BASE) || \
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(CFG_ENV_ADDR >= (CFG_MONITOR_BASE + CFG_MONITOR_LEN)) ) || \
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defined(CFG_ENV_IS_IN_NVRAM)
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#define TOTAL_MALLOC_LEN (CFG_MALLOC_LEN + CFG_ENV_SIZE)
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#else
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#define TOTAL_MALLOC_LEN CFG_MALLOC_LEN
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#endif
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#undef DEBUG
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extern int timer_init(void);
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extern int incaip_set_cpuclk(void);
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extern ulong uboot_end_data;
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extern ulong uboot_end;
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ulong monitor_flash_len;
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const char version_string[] =
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U_BOOT_VERSION" (" __DATE__ " - " __TIME__ ")";
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static char *failed = "*** failed ***\n";
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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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*/
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static void mem_malloc_init (void)
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{
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ulong dest_addr = CFG_MONITOR_BASE + gd->reloc_off;
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mem_malloc_end = dest_addr;
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mem_malloc_start = dest_addr - TOTAL_MALLOC_LEN;
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mem_malloc_brk = mem_malloc_start;
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memset ((void *) mem_malloc_start,
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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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static int init_func_ram (void)
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{
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#ifdef CONFIG_BOARD_TYPES
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int board_type = gd->board_type;
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#else
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int board_type = 0; /* use dummy arg */
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#endif
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puts ("DRAM: ");
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if ((gd->ram_size = initdram (board_type)) > 0) {
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print_size (gd->ram_size, "\n");
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return (0);
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}
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puts (failed);
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return (1);
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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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return (0);
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}
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static void display_flash_config(ulong size)
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{
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puts ("Flash: ");
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print_size (size, "\n");
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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->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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/*
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* Breath some life into the board...
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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 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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timer_init,
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env_init, /* initialize environment */
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#ifdef CONFIG_INCA_IP
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incaip_set_cpuclk, /* set cpu clock according to environment variable */
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#endif
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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,
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display_banner, /* say that we are here */
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checkboard,
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init_func_ram,
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NULL,
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};
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void board_init_f(ulong bootflag)
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{
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gd_t gd_data, *id;
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bd_t *bd;
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init_fnc_t **init_fnc_ptr;
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ulong addr, addr_sp, len = (ulong)&uboot_end - CFG_MONITOR_BASE;
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ulong *s;
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#ifdef CONFIG_PURPLE
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void copy_code (ulong);
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#endif
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/* Pointer is writable since we allocated a register for it.
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*/
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gd = &gd_data;
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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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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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/*
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* Now that we have DRAM mapped and working, we can
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* relocate the code and continue running from DRAM.
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*/
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addr = CFG_SDRAM_BASE + gd->ram_size;
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/* We can reserve some RAM "on top" here.
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*/
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/* round down to next 4 kB limit.
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*/
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addr &= ~(4096 - 1);
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debug ("Top of RAM usable for U-Boot at: %08lx\n", addr);
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/* Reserve memory for U-Boot code, data & bss
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* round down to next 16 kB limit
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*/
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addr -= len;
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addr &= ~(16 * 1024 - 1);
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debug ("Reserving %ldk for U-Boot at: %08lx\n", len >> 10, addr);
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/* Reserve memory for malloc() arena.
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*/
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addr_sp = addr - TOTAL_MALLOC_LEN;
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debug ("Reserving %dk for malloc() at: %08lx\n",
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TOTAL_MALLOC_LEN >> 10, addr_sp);
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/*
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* (permanently) allocate a Board Info struct
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* and a permanent copy of the "global" data
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*/
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addr_sp -= sizeof(bd_t);
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bd = (bd_t *)addr_sp;
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gd->bd = bd;
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debug ("Reserving %d Bytes for Board Info at: %08lx\n",
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sizeof(bd_t), addr_sp);
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addr_sp -= sizeof(gd_t);
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id = (gd_t *)addr_sp;
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debug ("Reserving %d Bytes for Global Data at: %08lx\n",
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sizeof (gd_t), addr_sp);
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/* Reserve memory for boot params.
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*/
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addr_sp -= CFG_BOOTPARAMS_LEN;
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bd->bi_boot_params = addr_sp;
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debug ("Reserving %dk for boot params() at: %08lx\n",
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CFG_BOOTPARAMS_LEN >> 10, addr_sp);
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/*
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* Finally, we set up a new (bigger) stack.
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*
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* Leave some safety gap for SP, force alignment on 16 byte boundary
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* Clear initial stack frame
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*/
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addr_sp -= 16;
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addr_sp &= ~0xF;
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s = (ulong *)addr_sp;
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*s-- = 0;
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*s-- = 0;
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addr_sp = (ulong)s;
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debug ("Stack Pointer at: %08lx\n", addr_sp);
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/*
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* Save local variables to board info struct
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*/
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bd->bi_memstart = CFG_SDRAM_BASE; /* start of DRAM memory */
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bd->bi_memsize = gd->ram_size; /* size of DRAM memory in bytes */
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bd->bi_baudrate = gd->baudrate; /* Console Baudrate */
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memcpy (id, (void *)gd, sizeof (gd_t));
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/* On the purple board we copy the code in a special way
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* in order to solve flash problems
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*/
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#ifdef CONFIG_PURPLE
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copy_code(addr);
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#endif
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relocate_code (addr_sp, id, addr);
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/* NOTREACHED - relocate_code() does not return */
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}
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/************************************************************************
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*
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* This is the next part if the initialization sequence: we are now
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* running from RAM and have a "normal" C environment, i. e. global
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* data can be written, BSS has been cleared, the stack size in not
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* that critical any more, etc.
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*
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************************************************************************
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*/
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void board_init_r (gd_t *id, ulong dest_addr)
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{
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cmd_tbl_t *cmdtp;
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ulong size;
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extern void malloc_bin_reloc (void);
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#ifndef CFG_ENV_IS_NOWHERE
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extern char * env_name_spec;
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#endif
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char *s, *e;
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bd_t *bd;
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int i;
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gd = id;
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gd->flags |= GD_FLG_RELOC; /* tell others: relocation done */
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debug ("Now running in RAM - U-Boot at: %08lx\n", dest_addr);
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gd->reloc_off = dest_addr - CFG_MONITOR_BASE;
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monitor_flash_len = (ulong)&uboot_end_data - dest_addr;
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/*
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* We have to relocate the command table manually
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*/
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for (cmdtp = &__u_boot_cmd_start; cmdtp != &__u_boot_cmd_end; cmdtp++) {
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ulong addr;
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addr = (ulong) (cmdtp->cmd) + gd->reloc_off;
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#if 0
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printf ("Command \"%s\": 0x%08lx => 0x%08lx\n",
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cmdtp->name, (ulong) (cmdtp->cmd), addr);
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#endif
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cmdtp->cmd =
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(int (*)(struct cmd_tbl_s *, int, int, char *[]))addr;
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addr = (ulong)(cmdtp->name) + gd->reloc_off;
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cmdtp->name = (char *)addr;
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if (cmdtp->usage) {
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addr = (ulong)(cmdtp->usage) + gd->reloc_off;
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cmdtp->usage = (char *)addr;
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}
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#ifdef CFG_LONGHELP
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if (cmdtp->help) {
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addr = (ulong)(cmdtp->help) + gd->reloc_off;
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cmdtp->help = (char *)addr;
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}
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#endif
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}
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/* there are some other pointer constants we must deal with */
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#ifndef CFG_ENV_IS_NOWHERE
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env_name_spec += gd->reloc_off;
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#endif
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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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bd = gd->bd;
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bd->bi_flashstart = CFG_FLASH_BASE;
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bd->bi_flashsize = size;
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#if CFG_MONITOR_BASE == CFG_FLASH_BASE
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bd->bi_flashoffset = monitor_flash_len; /* reserved area for U-Boot */
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#else
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bd->bi_flashoffset = 0;
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#endif
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/* initialize malloc() area */
|
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mem_malloc_init();
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malloc_bin_reloc();
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/* relocate environment function pointers etc. */
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env_relocate();
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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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|
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#if defined(CONFIG_PCI)
|
||
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/*
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||
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* Do pci configuration
|
||
|
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*/
|
||
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pci_init();
|
||
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#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)
|
||
|
|
#if defined(CONFIG_NET_MULTI)
|
||
|
|
puts ("Net: ");
|
||
|
|
#endif
|
||
|
|
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 (;;);
|
||
|
|
}
|