u-boot/lib_m68k/board.c
2006-05-10 17:43:20 +02:00

729 lines
17 KiB
C

/*
* (C) Copyright 2003
* Josef Baumgartner <josef.baumgartner@telex.de>
*
* (C) Copyright 2000-2002
* Wolfgang Denk, DENX Software Engineering, wd@denx.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 <malloc.h>
#include <devices.h>
#ifdef CONFIG_M5272
#include <asm/immap_5272.h>
#endif
#if (CONFIG_COMMANDS & CFG_CMD_IDE)
#include <ide.h>
#endif
#if (CONFIG_COMMANDS & CFG_CMD_SCSI)
#include <scsi.h>
#endif
#if (CONFIG_COMMANDS & CFG_CMD_KGDB)
#include <kgdb.h>
#endif
#ifdef CONFIG_STATUS_LED
#include <status_led.h>
#endif
#include <net.h>
#if (CONFIG_COMMANDS & CFG_CMD_BEDBUG)
#include <cmd_bedbug.h>
#endif
#ifdef CFG_ALLOC_DPRAM
#include <commproc.h>
#endif
#include <version.h>
#if defined(CONFIG_HARD_I2C) || \
defined(CONFIG_SOFT_I2C)
#include <i2c.h>
#endif
DECLARE_GLOBAL_DATA_PTR;
static char *failed = "*** failed ***\n";
#ifdef CONFIG_PCU_E
extern flash_info_t flash_info[];
#endif
#include <environment.h>
#if ( ((CFG_ENV_ADDR+CFG_ENV_SIZE) < CFG_MONITOR_BASE) || \
(CFG_ENV_ADDR >= (CFG_MONITOR_BASE + CFG_MONITOR_LEN)) ) || \
defined(CFG_ENV_IS_IN_NVRAM)
#define TOTAL_MALLOC_LEN (CFG_MALLOC_LEN + CFG_ENV_SIZE)
#else
#define TOTAL_MALLOC_LEN CFG_MALLOC_LEN
#endif
extern ulong __init_end;
extern ulong _end;
extern void timer_init(void);
#if defined(CONFIG_WATCHDOG)
# define INIT_FUNC_WATCHDOG_INIT watchdog_init,
# define WATCHDOG_DISABLE watchdog_disable
extern int watchdog_init(void);
extern int watchdog_disable(void);
#else
# define INIT_FUNC_WATCHDOG_INIT /* undef */
# define WATCHDOG_DISABLE /* undef */
#endif /* CONFIG_WATCHDOG */
ulong monitor_flash_len;
/*
* 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;
/************************************************************************
* Utilities *
************************************************************************
*/
/*
* The Malloc area is immediately below the monitor copy in DRAM
*/
static void mem_malloc_init (void)
{
ulong dest_addr = CFG_MONITOR_BASE + gd->reloc_off;
mem_malloc_end = dest_addr;
mem_malloc_start = dest_addr - TOTAL_MALLOC_LEN;
mem_malloc_brk = mem_malloc_start;
memset ((void *) mem_malloc_start,
0,
mem_malloc_end - mem_malloc_start);
}
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);
}
/*
* 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 Utilities *
************************************************************************
* Some of this code should be moved into the core functions,
* but let's get it working (again) first...
*/
static int init_baudrate (void)
{
uchar tmp[64]; /* long enough for environment variables */
int i = getenv_r ("baudrate", tmp, sizeof (tmp));
gd->baudrate = (i > 0)
? (int) simple_strtoul (tmp, NULL, 10)
: CONFIG_BAUDRATE;
return (0);
}
/***********************************************************************/
static int init_func_ram (void)
{
int board_type = 0; /* use dummy arg */
puts ("DRAM: ");
if ((gd->ram_size = initdram (board_type)) > 0) {
print_size (gd->ram_size, "\n");
return (0);
}
puts (failed);
return (1);
}
/***********************************************************************/
#if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
static int init_func_i2c (void)
{
puts ("I2C: ");
i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE);
puts ("ready\n");
return (0);
}
#endif
/***********************************************************************/
/************************************************************************
* Initialization sequence *
************************************************************************
*/
init_fnc_t *init_sequence[] = {
env_init,
init_baudrate,
serial_init,
console_init_f,
display_options,
checkcpu,
checkboard,
#if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
init_func_i2c,
#endif
init_func_ram,
#if defined(CFG_DRAM_TEST)
testdram,
#endif /* CFG_DRAM_TEST */
INIT_FUNC_WATCHDOG_INIT
NULL, /* Terminate this list */
};
/************************************************************************
*
* This is the first part of the initialization sequence that is
* implemented in C, but still running from ROM.
*
* The main purpose is to provide a (serial) console interface as
* soon as possible (so we can see any error messages), and to
* initialize the RAM so that we can relocate the monitor code to
* RAM.
*
* Be aware of the restrictions: global data is read-only, BSS is not
* initialized, and stack space is limited to a few kB.
*
************************************************************************
*/
void
board_init_f (ulong bootflag)
{
bd_t *bd;
ulong len, addr, addr_sp;
ulong *paddr;
gd_t *id;
init_fnc_t **init_fnc_ptr;
#ifdef CONFIG_PRAM
int i;
ulong reg;
uchar tmp[64]; /* long enough for environment variables */
#endif
/* Pointer is writable since we allocated a register for it */
gd = (gd_t *) (CFG_INIT_RAM_ADDR + CFG_GBL_DATA_OFFSET);
/* compiler optimization barrier needed for GCC >= 3.4 */
__asm__ __volatile__("": : :"memory");
/* Clear initial global data */
memset ((void *) gd, 0, sizeof (gd_t));
for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
if ((*init_fnc_ptr)() != 0) {
hang ();
}
}
/*
* Now that we have DRAM mapped and working, we can
* relocate the code and continue running from DRAM.
*
* Reserve memory at end of RAM for (top down in that order):
* - protected RAM
* - LCD framebuffer
* - monitor code
* - board info struct
*/
len = (ulong)&_end - CFG_MONITOR_BASE;
addr = CFG_SDRAM_BASE + gd->ram_size;
#ifdef CONFIG_LOGBUFFER
/* reserve kernel log buffer */
addr -= (LOGBUFF_RESERVE);
debug ("Reserving %dk for kernel logbuffer at %08lx\n", LOGBUFF_LEN, addr);
#endif
#ifdef CONFIG_PRAM
/*
* reserve protected RAM
*/
i = getenv_r ("pram", tmp, sizeof (tmp));
reg = (i > 0) ? simple_strtoul (tmp, NULL, 10) : CONFIG_PRAM;
addr -= (reg << 10); /* size is in kB */
debug ("Reserving %ldk for protected RAM at %08lx\n", reg, addr);
#endif /* CONFIG_PRAM */
/*
* reserve memory for U-Boot code, data & bss
* round down to next 4 kB limit
*/
addr -= len;
addr &= ~(4096 - 1);
debug ("Reserving %ldk for U-Boot at: %08lx\n", len >> 10, addr);
/*
* reserve memory for malloc() arena
*/
addr_sp = addr - TOTAL_MALLOC_LEN;
debug ("Reserving %dk for malloc() at: %08lx\n",
TOTAL_MALLOC_LEN >> 10, addr_sp);
/*
* (permanently) allocate a Board Info struct
* and a permanent copy of the "global" data
*/
addr_sp -= sizeof (bd_t);
bd = (bd_t *) addr_sp;
gd->bd = bd;
debug ("Reserving %d Bytes for Board Info at: %08lx\n",
sizeof (bd_t), addr_sp);
addr_sp -= sizeof (gd_t);
id = (gd_t *) addr_sp;
debug ("Reserving %d Bytes for Global Data at: %08lx\n",
sizeof (gd_t), addr_sp);
/* Reserve memory for boot params. */
addr_sp -= CFG_BOOTPARAMS_LEN;
bd->bi_boot_params = addr_sp;
debug ("Reserving %dk for boot parameters at: %08lx\n",
CFG_BOOTPARAMS_LEN >> 10, addr_sp);
/*
* Finally, we set up a new (bigger) stack.
*
* Leave some safety gap for SP, force alignment on 16 byte boundary
* Clear initial stack frame
*/
addr_sp -= 16;
addr_sp &= ~0xF;
paddr = (ulong *)addr_sp;
*paddr-- = 0;
*paddr-- = 0;
addr_sp = (ulong)paddr;
debug ("Stack Pointer at: %08lx\n", addr_sp);
/*
* Save local variables to board info struct
*/
bd->bi_memstart = CFG_SDRAM_BASE; /* start of DRAM memory */
bd->bi_memsize = gd->ram_size; /* size of DRAM memory in bytes */
bd->bi_mbar_base = CFG_MBAR; /* base of internal registers */
bd->bi_bootflags = bootflag; /* boot / reboot flag (for LynxOS) */
WATCHDOG_RESET ();
bd->bi_intfreq = gd->cpu_clk; /* Internal Freq, in Hz */
bd->bi_busfreq = gd->bus_clk; /* Bus Freq, in Hz */
bd->bi_baudrate = gd->baudrate; /* Console Baudrate */
#ifdef CFG_EXTBDINFO
strncpy (bd->bi_s_version, "1.2", sizeof (bd->bi_s_version));
strncpy (bd->bi_r_version, U_BOOT_VERSION, sizeof (bd->bi_r_version));
#endif
WATCHDOG_RESET ();
#ifdef CONFIG_POST
post_bootmode_init();
post_run (NULL, POST_ROM | post_bootmode_get(0));
#endif
WATCHDOG_RESET();
memcpy (id, (void *)gd, sizeof (gd_t));
debug ("Start relocate of code from %08x to %08lx\n", CFG_MONITOR_BASE, addr);
relocate_code (addr_sp, id, addr);
/* NOTREACHED - jump_to_ram() does not return */
}
/************************************************************************
*
* This is the next part if the initialization sequence: we are now
* running from RAM and have a "normal" C environment, i. e. global
* data can be written, BSS has been cleared, the stack size in not
* that critical any more, etc.
*
************************************************************************
*/
void board_init_r (gd_t *id, ulong dest_addr)
{
cmd_tbl_t *cmdtp;
char *s, *e;
bd_t *bd;
int i;
extern void malloc_bin_reloc (void);
#ifndef CFG_ENV_IS_NOWHERE
extern char * env_name_spec;
#endif
#ifndef CFG_NO_FLASH
ulong flash_size;
#endif
gd = id; /* initialize RAM version of global data */
bd = gd->bd;
gd->flags |= GD_FLG_RELOC; /* tell others: relocation done */
debug ("Now running in RAM - U-Boot at: %08lx\n", dest_addr);
WATCHDOG_RESET ();
gd->reloc_off = dest_addr - CFG_MONITOR_BASE;
monitor_flash_len = (ulong)&__init_end - dest_addr;
/*
* We have to relocate the command table manually
*/
for (cmdtp = &__u_boot_cmd_start; cmdtp != &__u_boot_cmd_end; cmdtp++) {
ulong addr;
addr = (ulong) (cmdtp->cmd) + gd->reloc_off;
#if 0
printf ("Command \"%s\": 0x%08lx => 0x%08lx\n",
cmdtp->name, (ulong) (cmdtp->cmd), addr);
#endif
cmdtp->cmd =
(int (*)(struct cmd_tbl_s *, int, int, char *[]))addr;
addr = (ulong)(cmdtp->name) + gd->reloc_off;
cmdtp->name = (char *)addr;
if (cmdtp->usage) {
addr = (ulong)(cmdtp->usage) + gd->reloc_off;
cmdtp->usage = (char *)addr;
}
#ifdef CFG_LONGHELP
if (cmdtp->help) {
addr = (ulong)(cmdtp->help) + gd->reloc_off;
cmdtp->help = (char *)addr;
}
#endif
}
/* there are some other pointer constants we must deal with */
#ifndef CFG_ENV_IS_NOWHERE
env_name_spec += gd->reloc_off;
#endif
WATCHDOG_RESET ();
#ifdef CONFIG_LOGBUFFER
logbuff_init_ptrs ();
#endif
#ifdef CONFIG_POST
post_output_backlog ();
post_reloc ();
#endif
WATCHDOG_RESET();
#if 0
/* instruction cache enabled in cpu_init_f() for faster relocation */
icache_enable (); /* it's time to enable the instruction cache */
#endif
/*
* Setup trap handlers
*/
trap_init (0);
#if !defined(CFG_NO_FLASH)
puts ("FLASH: ");
if ((flash_size = flash_init ()) > 0) {
# ifdef CFG_FLASH_CHECKSUM
print_size (flash_size, "");
/*
* Compute and print flash CRC if flashchecksum is set to 'y'
*
* NOTE: Maybe we should add some WATCHDOG_RESET()? XXX
*/
s = getenv ("flashchecksum");
if (s && (*s == 'y')) {
printf (" CRC: %08lX",
crc32 (0,
(const unsigned char *) CFG_FLASH_BASE,
flash_size)
);
}
putc ('\n');
# else /* !CFG_FLASH_CHECKSUM */
print_size (flash_size, "\n");
# endif /* CFG_FLASH_CHECKSUM */
} else {
puts (failed);
hang ();
}
bd->bi_flashstart = CFG_FLASH_BASE; /* update start of FLASH memory */
bd->bi_flashsize = flash_size; /* size of FLASH memory (final value) */
bd->bi_flashoffset = 0;
#else /* CFG_NO_FLASH */
bd->bi_flashsize = 0;
bd->bi_flashstart = 0;
bd->bi_flashoffset = 0;
#endif /* !CFG_NO_FLASH */
WATCHDOG_RESET ();
/* initialize higher level parts of CPU like time base and timers */
cpu_init_r ();
WATCHDOG_RESET ();
/* initialize malloc() area */
mem_malloc_init ();
malloc_bin_reloc ();
#ifdef CONFIG_SPI
# if !defined(CFG_ENV_IS_IN_EEPROM)
spi_init_f ();
# endif
spi_init_r ();
#endif
/* relocate environment function pointers etc. */
env_relocate ();
/*
* Fill in missing fields of bd_info.
* We do this here, where we have "normal" access to the
* environment; we used to do this still running from ROM,
* where had to use getenv_r(), which can be pretty slow when
* the environment is in EEPROM.
*/
s = getenv ("ethaddr");
for (i = 0; i < 6; ++i) {
bd->bi_enetaddr[i] = s ? simple_strtoul (s, &e, 16) : 0;
if (s)
s = (*e) ? e + 1 : e;
}
/* IP Address */
bd->bi_ip_addr = getenv_IPaddr ("ipaddr");
WATCHDOG_RESET ();
/** leave this here (after malloc(), environment and PCI are working) **/
/* Initialize devices */
devices_init ();
/* Initialize the jump table for applications */
jumptable_init ();
/* Initialize the console (after the relocation and devices init) */
console_init_r ();
#if defined(CONFIG_MISC_INIT_R)
/* miscellaneous platform dependent initialisations */
misc_init_r ();
#endif
#if (CONFIG_COMMANDS & CFG_CMD_KGDB)
WATCHDOG_RESET ();
puts ("KGDB: ");
kgdb_init ();
#endif
debug ("U-Boot relocated to %08lx\n", dest_addr);
/*
* Enable Interrupts
*/
interrupt_init ();
/* Must happen after interrupts are initialized since
* an irq handler gets installed
*/
timer_init();
#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);
/* Insert function pointers now that we have relocated the code */
/* 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_DOC)
WATCHDOG_RESET ();
puts ("DOC: ");
doc_init ();
#endif
#if (CONFIG_COMMANDS & CFG_CMD_NAND)
WATCHDOG_RESET ();
puts ("NAND: ");
nand_init(); /* go init the NAND */
#endif
#if (CONFIG_COMMANDS & CFG_CMD_NET) && defined(FEC_ENET)
WATCHDOG_RESET();
eth_init(bd);
#endif
#ifdef CONFIG_POST
post_run (NULL, POST_RAM | post_bootmode_get(0));
#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
#if (CONFIG_COMMANDS & CFG_CMD_BEDBUG)
WATCHDOG_RESET ();
bedbug_init ();
#endif
#if defined(CONFIG_PRAM) || defined(CONFIG_LOGBUFFER)
/*
* Export available size of memory for Linux,
* taking into account the protected RAM at top of memory
*/
{
ulong pram;
uchar memsz[32];
#ifdef CONFIG_PRAM
char *s;
if ((s = getenv ("pram")) != NULL) {
pram = simple_strtoul (s, NULL, 10);
} else {
pram = CONFIG_PRAM;
}
#else
pram=0;
#endif
#ifdef CONFIG_LOGBUFFER
/* Also take the logbuffer into account (pram is in kB) */
pram += (LOGBUFF_LEN+LOGBUFF_OVERHEAD)/1024;
#endif
sprintf (memsz, "%ldk", (bd->bi_memsize / 1024) - pram);
setenv ("mem", memsz);
}
#endif
#ifdef CONFIG_MODEM_SUPPORT
{
extern int do_mdm_init;
do_mdm_init = gd->do_mdm_init;
}
#endif
#ifdef CONFIG_WATCHDOG
/* disable watchdog if environment is set */
if ((s = getenv ("watchdog")) != NULL) {
if (strncmp (s, "off", 3) == 0) {
WATCHDOG_DISABLE ();
}
}
#endif /* CONFIG_WATCHDOG*/
/* Initialization complete - start the monitor */
/* main_loop() can return to retry autoboot, if so just run it again. */
for (;;) {
WATCHDOG_RESET ();
main_loop ();
}
/* NOTREACHED - no way out of command loop except booting */
}
void hang(void)
{
puts ("### ERROR ### Please RESET the board ###\n");
for (;;);
}