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uboot-mt623x/arch/i386/lib/board.c

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/*
* (C) Copyright 2002
* Daniel Engstr<74>m, Omicron Ceti AB, daniel@omicron.se
*
* (C) Copyright 2002
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* (C) Copyright 2002
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Marius Groeger <mgroeger@sysgo.de>
*
* 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 <watchdog.h>
#include <command.h>
#include <stdio_dev.h>
#include <timestamp.h>
#include <version.h>
#include <malloc.h>
#include <net.h>
#include <ide.h>
#include <serial.h>
#include <asm/u-boot-i386.h>
#include <elf.h>
#ifdef CONFIG_BITBANGMII
#include <miiphy.h>
#endif
DECLARE_GLOBAL_DATA_PTR;
/* Exports from the Linker Script */
extern ulong _i386boot_text_start;
extern ulong _i386boot_rel_dyn_start;
extern ulong _i386boot_rel_dyn_end;
extern ulong _i386boot_bss_start;
extern ulong _i386boot_bss_size;
void ram_bootstrap (void *, ulong);
const char version_string[] =
U_BOOT_VERSION" (" U_BOOT_DATE " - " U_BOOT_TIME ")";
/************************************************************************
* Init Utilities *
************************************************************************
* Some of this code should be moved into the core functions,
* or dropped completely,
* but let's get it working (again) first...
*/
static int init_baudrate (void)
{
char tmp[64]; /* long enough for environment variables */
int i = getenv_f("baudrate", tmp, 64);
gd->baudrate = (i != 0)
? (int) simple_strtoul (tmp, NULL, 10)
: CONFIG_BAUDRATE;
return (0);
}
static int display_banner (void)
{
printf ("\n\n%s\n\n", version_string);
/*
printf ("U-Boot code: %08lX -> %08lX data: %08lX -> %08lX\n"
" BSS: %08lX -> %08lX stack: %08lX -> %08lX\n",
i386boot_start, i386boot_romdata_start-1,
i386boot_romdata_dest, i386boot_romdata_dest+i386boot_romdata_size-1,
i386boot_bss_start, i386boot_bss_start+i386boot_bss_size-1,
i386boot_bss_start+i386boot_bss_size,
i386boot_bss_start+i386boot_bss_size+CONFIG_SYS_STACK_SIZE-1);
*/
return (0);
}
/*
* WARNING: this code looks "cleaner" than the PowerPC version, but
* has the disadvantage that you either get nothing, or everything.
* On PowerPC, you might see "DRAM: " before the system hangs - which
* gives a simple yet clear indication which part of the
* initialization if failing.
*/
static int display_dram_config (void)
{
int i;
puts ("DRAM Configuration:\n");
for (i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
print_size (gd->bd->bi_dram[i].size, "\n");
}
return (0);
}
static void display_flash_config (ulong size)
{
puts ("Flash: ");
print_size (size, "\n");
}
/*
* Breath some life into the board...
*
* Initialize an SMC for serial comms, and carry out some hardware
* tests.
*
* The first part of initialization is running from Flash memory;
* its main purpose is to initialize the RAM so that we
* can relocate the monitor code to RAM.
*/
/*
* 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[] = {
cpu_init_r, /* basic cpu dependent setup */
board_early_init_r, /* basic board dependent setup */
dram_init, /* configure available RAM banks */
interrupt_init, /* set up exceptions */
timer_init,
env_init, /* initialize environment */
init_baudrate, /* initialze baudrate settings */
serial_init, /* serial communications setup */
display_banner,
display_dram_config,
NULL,
};
static gd_t gd_data;
gd_t *gd;
/*
* Load U-Boot into RAM, initialize BSS, perform relocation adjustments
*/
void board_init_f (ulong stack_limit)
{
void *text_start = &_i386boot_text_start;
void *u_boot_cmd_end = &__u_boot_cmd_end;
Elf32_Rel *rel_dyn_start = (Elf32_Rel *)&_i386boot_rel_dyn_start;
Elf32_Rel *rel_dyn_end = (Elf32_Rel *)&_i386boot_rel_dyn_end;
void *bss_start = &_i386boot_bss_start;
ulong bss_size = (ulong)&_i386boot_bss_size;
ulong uboot_size;
void *dest_addr;
ulong rel_offset;
Elf32_Rel *re;
void (*start_func)(void *, ulong);
uboot_size = (ulong)u_boot_cmd_end - (ulong)text_start;
dest_addr = (void *)stack_limit - (uboot_size + (ulong)bss_size);
rel_offset = text_start - dest_addr;
start_func = ram_bootstrap - rel_offset;
/* First stage CPU initialization */
if (cpu_init_f() != 0)
hang();
/* First stage Board initialization */
if (board_early_init_f() != 0)
hang();
/* Copy U-Boot into RAM */
memcpy(dest_addr, text_start, uboot_size);
/* Clear BSS */
memset(bss_start - rel_offset, 0, bss_size);
/* Perform relocation adjustments */
for (re = rel_dyn_start; re < rel_dyn_end; re++)
{
if (re->r_offset >= TEXT_BASE)
if (*(ulong *)re->r_offset >= TEXT_BASE)
*(ulong *)(re->r_offset - rel_offset) -= (Elf32_Addr)rel_offset;
}
/* Enter the relocated U-Boot! */
start_func(dest_addr, rel_offset);
/* NOTREACHED - board_init_f() does not return */
while(1);
}
/*
* We cannot initialize gd_data in board_init_f() because we would be
* attempting to write to flash (I have even tried using manual relocation
* adjustments on pointers but it just won't work) and board_init_r() does
* not have enough arguments to allow us to pass the relocation offset
* straight up. This bootstrap function (which runs in RAM) is used to
* setup gd_data in order to pass the relocation offset to the rest of
* U-Boot.
*
* TODO: The compiler optimization barrier is intended to stop GCC from
* optimizing this function into board_init_f(). It seems to work without
* it, but I've left it in to be sure. I think also that the barrier in
* board_init_r() is no longer needed, but left it in 'just in case'
*/
void ram_bootstrap (void *dest_addr, ulong rel_offset)
{
/* compiler optimization barrier needed for GCC >= 3.4 */
__asm__ __volatile__("": : :"memory");
/* tell others: relocation done */
gd_data.reloc_off = rel_offset;
gd_data.flags |= GD_FLG_RELOC;
board_init_r(&gd_data, (ulong)dest_addr);
}
void board_init_r(gd_t *id, ulong dest_addr)
{
char *s;
int i;
ulong size;
static bd_t bd_data;
init_fnc_t **init_fnc_ptr;
show_boot_progress(0x21);
gd = id;
/* compiler optimization barrier needed for GCC >= 3.4 */
__asm__ __volatile__("": : :"memory");
gd->bd = &bd_data;
memset (gd->bd, 0, sizeof (bd_t));
show_boot_progress(0x22);
gd->baudrate = CONFIG_BAUDRATE;
mem_malloc_init((((ulong)dest_addr - CONFIG_SYS_MALLOC_LEN)+3)&~3,
CONFIG_SYS_MALLOC_LEN);
for (init_fnc_ptr = init_sequence, i=0; *init_fnc_ptr; ++init_fnc_ptr, i++) {
show_boot_progress(0xa130|i);
if ((*init_fnc_ptr)() != 0) {
hang ();
}
}
show_boot_progress(0x23);
#ifdef CONFIG_SERIAL_MULTI
serial_initialize();
#endif
/* configure available FLASH banks */
size = flash_init();
display_flash_config(size);
show_boot_progress(0x24);
show_boot_progress(0x25);
/* initialize environment */
env_relocate ();
show_boot_progress(0x26);
#ifdef CONFIG_CMD_NET
/* IP Address */
bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");
#endif
#if defined(CONFIG_PCI)
/*
* Do pci configuration
*/
pci_init();
#endif
show_boot_progress(0x27);
stdio_init ();
jumptable_init ();
/* Initialize the console (after the relocation and devices init) */
console_init_r();
#ifdef CONFIG_MISC_INIT_R
/* miscellaneous platform dependent initialisations */
misc_init_r();
#endif
#if defined(CONFIG_CMD_PCMCIA) && !defined(CONFIG_CMD_IDE)
WATCHDOG_RESET();
puts ("PCMCIA:");
pcmcia_init();
#endif
#if defined(CONFIG_CMD_KGDB)
WATCHDOG_RESET();
puts("KGDB: ");
kgdb_init();
#endif
/* enable exceptions */
enable_interrupts();
show_boot_progress(0x28);
/* Must happen after interrupts are initialized since
* an irq handler gets installed
*/
#ifdef CONFIG_SERIAL_SOFTWARE_FIFO
serial_buffered_init();
#endif
#ifdef CONFIG_STATUS_LED
status_led_set (STATUS_LED_BOOT, STATUS_LED_BLINKING);
#endif
udelay(20);
set_timer (0);
/* Initialize from environment */
if ((s = getenv ("loadaddr")) != NULL) {
load_addr = simple_strtoul (s, NULL, 16);
}
#if defined(CONFIG_CMD_NET)
if ((s = getenv ("bootfile")) != NULL) {
copy_filename (BootFile, s, sizeof (BootFile));
}
#endif
WATCHDOG_RESET();
#if defined(CONFIG_CMD_IDE)
WATCHDOG_RESET();
puts("IDE: ");
ide_init();
#endif
#if defined(CONFIG_CMD_SCSI)
WATCHDOG_RESET();
puts("SCSI: ");
scsi_init();
#endif
#if defined(CONFIG_CMD_DOC)
WATCHDOG_RESET();
puts("DOC: ");
doc_init();
#endif
#ifdef CONFIG_BITBANGMII
bb_miiphy_init();
#endif
#if defined(CONFIG_CMD_NET)
#if defined(CONFIG_NET_MULTI)
WATCHDOG_RESET();
puts("Net: ");
#endif
eth_initialize(gd->bd);
#endif
#if ( defined(CONFIG_CMD_NET)) && (0)
WATCHDOG_RESET();
# ifdef DEBUG
puts ("Reset Ethernet PHY\n");
# endif
reset_phy();
#endif
#ifdef CONFIG_LAST_STAGE_INIT
WATCHDOG_RESET();
/*
* Some parts can be only initialized if all others (like
* Interrupts) are up and running (i.e. the PC-style ISA
* keyboard).
*/
last_stage_init();
#endif
#ifdef CONFIG_POST
post_run (NULL, POST_RAM | post_bootmode_get(0));
#endif
show_boot_progress(0x29);
/* 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 (;;);
}
unsigned long do_go_exec (ulong (*entry)(int, char *[]), int argc, char * const argv[])
{
/*
* x86 does not use a dedicated register to pass the pointer
* to the global_data
*/
argv[-1] = (char *)gd;
return (entry) (argc, argv);
}
void setup_pcat_compatibility(void)
__attribute__((weak, alias("__setup_pcat_compatibility")));
void __setup_pcat_compatibility(void)
{
}
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