/*
* (C) Copyright 2002
* Daniel Engström, 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 <devices.h>
#include <version.h>
#include <malloc.h>
#include <syscall.h>
#include <net.h>
#include <ide.h>
#include <asm/u-boot-i386.h>
extern long _i386boot_start;
extern long _i386boot_end;
extern long _i386boot_romdata_start;
extern long _i386boot_romdata_dest;
extern long _i386boot_romdata_size;
extern long _i386boot_bss_start;
extern long _i386boot_bss_size;
extern long _i386boot_realmode;
extern long _i386boot_realmode_size;
extern long _i386boot_bios;
extern long _i386boot_bios_size;
/* The symbols defined by the linker script becomes pointers
* which is somewhat inconveient ... */
ulong i386boot_start = (ulong)&_i386boot_start; /* code start (in flash) defined in start.S */
ulong i386boot_end = (ulong)&_i386boot_end; /* code end (in flash) */
ulong i386boot_romdata_start = (ulong)&_i386boot_romdata_start; /* datasegment in flash (also code+rodata end) */
ulong i386boot_romdata_dest = (ulong)&_i386boot_romdata_dest; /* data location segment in ram */
ulong i386boot_romdata_size = (ulong)&_i386boot_romdata_size; /* size of data segment */
ulong i386boot_bss_start = (ulong)&_i386boot_bss_start; /* bss start */
ulong i386boot_bss_size = (ulong)&_i386boot_bss_size; /* bss size */
ulong i386boot_realmode = (ulong)&_i386boot_realmode; /* start of realmode entry code */
ulong i386boot_realmode_size = (ulong)&_i386boot_realmode_size; /* size of realmode entry code */
ulong i386boot_bios = (ulong)&_i386boot_bios; /* start of BIOS emulation code */
ulong i386boot_bios_size = (ulong)&_i386boot_bios_size; /* size of BIOS emulation code */
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 = 0;
static ulong mem_malloc_end = 0;
static ulong mem_malloc_brk = 0;
static int mem_malloc_init(void)
{
DECLARE_GLOBAL_DATA_PTR;
/* start malloc area right after the stack */
mem_malloc_start = i386boot_bss_start +
i386boot_bss_size + CFG_STACK_SIZE;
mem_malloc_start = (mem_malloc_start+3)&~3;
/* Use all available RAM for malloc() */
mem_malloc_end = gd->ram_size;
mem_malloc_brk = mem_malloc_start;
return 0;
}
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);
}
char *strmhz (char *buf, long hz)
{
long l, n;
long m;
n = hz / 1000000L;
l = sprintf (buf, "%ld", n);
m = (hz % 1000000L) / 1000L;
if (m != 0)
sprintf (buf + l, ".%03ld", m);
return (buf);
}
/************************************************************************
* 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 void syscalls_init (void)
{
syscall_tbl[SYSCALL_MALLOC] = (void *) malloc;
syscall_tbl[SYSCALL_FREE] = (void *) free;
syscall_tbl[SYSCALL_INSTALL_HDLR] = (void *) irq_install_handler;
syscall_tbl[SYSCALL_FREE_HDLR] = (void *) irq_free_handler;
}
static int init_baudrate (void)
{
DECLARE_GLOBAL_DATA_PTR;
char tmp[64]; /* long enough for environment variables */
int i = getenv_r("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+CFG_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)
{
DECLARE_GLOBAL_DATA_PTR;
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, /* basic cpu dependent setup */
board_init, /* basic board dependent setup */
dram_init, /* configure available RAM banks */
mem_malloc_init, /* dependant on dram_init */
interrupt_init, /* set up exceptions */
timer_init,
serial_init,
env_init, /* initialize environment */
init_baudrate, /* initialze baudrate settings */
serial_init, /* serial communications setup */
display_banner,
display_dram_config,
NULL,
};
gd_t *global_data;
void start_i386boot (void)
{
DECLARE_GLOBAL_DATA_PTR;
char *s;
int i;
ulong size;
static gd_t gd_data;
static bd_t bd_data;
init_fnc_t **init_fnc_ptr;
show_boot_progress(0x21);
gd = global_data = &gd_data;
memset (gd, 0, sizeof (gd_t));
gd->bd = &bd_data;
memset (gd->bd, 0, sizeof (bd_t));
show_boot_progress(0x22);
gd->baudrate = CONFIG_BAUDRATE;
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);
/* 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);
/* IP Address */
bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");
/* MAC Address */
{
int i;
ulong reg;
char *s, *e;
uchar tmp[64];
i = getenv_r ("ethaddr", tmp, sizeof (tmp));
s = (i > 0) ? tmp : NULL;
for (reg = 0; reg < 6; ++reg) {
bd_data.bi_enetaddr[reg] = s ? simple_strtoul (s, &e, 16) : 0;
if (s)
s = (*e) ? e + 1 : e;
}
}
#if defined(CONFIG_PCI)
/*
* Do pci configuration
*/
pci_init();
#endif
show_boot_progress(0x27);
devices_init ();
/* allocate syscalls table (console_init_r will fill it in */
syscall_tbl = (void **) malloc (NR_SYSCALLS * sizeof (void *));
memset(syscall_tbl, 0, NR_SYSCALLS * sizeof (void *));
/* Initialize the console (after the relocation and devices init) */
console_init_r();
syscalls_init();
#ifdef CONFIG_MISC_INIT_R
/* miscellaneous platform dependent initialisations */
misc_init_r();
#endif
#if (CONFIG_COMMANDS & CFG_CMD_NET) && (0)
WATCHDOG_RESET();
# ifdef DEBUG
puts ("Reset Ethernet PHY\n");
# endif
reset_phy();
#endif
#if (CONFIG_COMMANDS & CFG_CMD_PCMCIA) && !(CONFIG_COMMANDS & CFG_CMD_IDE)
WATCHDOG_RESET();
puts ("PCMCIA:");
pcmcia_init();
#endif
#if (CONFIG_COMMANDS & CFG_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 (CONFIG_COMMANDS & CFG_CMD_NET)
if ((s = getenv ("bootfile")) != NULL) {
copy_filename (BootFile, s, sizeof (BootFile));
}
#endif /* CFG_CMD_NET */
WATCHDOG_RESET();
#if (CONFIG_COMMANDS & CFG_CMD_IDE)
WATCHDOG_RESET();
puts("IDE: ");
ide_init();
#endif /* CFG_CMD_IDE */
#if (CONFIG_COMMANDS & CFG_CMD_SCSI)
WATCHDOG_RESET();
puts("SCSI: ");
scsi_init();
#endif
#if (CONFIG_COMMANDS & CFG_CMD_DOC)
WATCHDOG_RESET();
puts("DOC: ");
doc_init();
#endif
#if (CONFIG_COMMANDS & CFG_CMD_NET) && defined(CONFIG_NET_MULTI)
WATCHDOG_RESET();
puts("Net: ");
eth_initialize(gd->bd);
#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));
if (post_bootmode_get(0) & POST_POWERFAIL) {
post_bootmode_clear();
board_poweroff();
}
#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 (;;);
}
