u-boot/arch/mips/lib/board.c
Wolfgang Denk 2e5167ccad Replace CONFIG_RELOC_FIXUP_WORKS by CONFIG_NEEDS_MANUAL_RELOC
By now, the majority of architectures have working relocation
support, so the few remaining architectures have become exceptions.
To make this more obvious, we make working relocation now the default
case, and flag the remaining cases with CONFIG_NEEDS_MANUAL_RELOC.

Signed-off-by: Wolfgang Denk <wd@denx.de>
Tested-by: Heiko Schocher <hs@denx.de>
Tested-by: Reinhard Meyer <u-boot@emk-elektronik.de>
2010-10-29 21:32:07 +02:00

407 lines
9.7 KiB
C

/*
* (C) Copyright 2003
* 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 <command.h>
#include <malloc.h>
#include <stdio_dev.h>
#include <timestamp.h>
#include <version.h>
#include <net.h>
#include <environment.h>
#include <nand.h>
#include <onenand_uboot.h>
#include <spi.h>
#ifdef CONFIG_BITBANGMII
#include <miiphy.h>
#endif
DECLARE_GLOBAL_DATA_PTR;
#undef DEBUG
extern int timer_init(void);
extern int incaip_set_cpuclk(void);
extern ulong uboot_end_data;
extern ulong uboot_end;
ulong monitor_flash_len;
const char version_string[] =
U_BOOT_VERSION" (" U_BOOT_DATE " - " U_BOOT_TIME ")";
static char *failed = "*** failed ***\n";
/*
* mips_io_port_base is the begin of the address space to which x86 style
* I/O ports are mapped.
*/
unsigned long mips_io_port_base = -1;
int __board_early_init_f(void)
{
/*
* Nothing to do in this dummy implementation
*/
return 0;
}
int board_early_init_f(void) __attribute__((weak, alias("__board_early_init_f")));
static int init_func_ram (void)
{
#ifdef CONFIG_BOARD_TYPES
int board_type = gd->board_type;
#else
int board_type = 0; /* use dummy arg */
#endif
puts ("DRAM: ");
if ((gd->ram_size = initdram (board_type)) > 0) {
print_size (gd->ram_size, "\n");
return (0);
}
puts (failed);
return (1);
}
static int display_banner(void)
{
printf ("\n\n%s\n\n", version_string);
return (0);
}
#ifndef CONFIG_SYS_NO_FLASH
static void display_flash_config(ulong size)
{
puts ("Flash: ");
print_size (size, "\n");
}
#endif
static int init_baudrate (void)
{
char tmp[64]; /* long enough for environment variables */
int i = getenv_f("baudrate", tmp, sizeof (tmp));
gd->baudrate = (i > 0)
? (int) simple_strtoul (tmp, NULL, 10)
: CONFIG_BAUDRATE;
return (0);
}
/*
* Breath some life into the board...
*
* 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[] = {
board_early_init_f,
timer_init,
env_init, /* initialize environment */
#ifdef CONFIG_INCA_IP
incaip_set_cpuclk, /* set cpu clock according to environment variable */
#endif
init_baudrate, /* initialze baudrate settings */
serial_init, /* serial communications setup */
console_init_f,
display_banner, /* say that we are here */
checkboard,
init_func_ram,
NULL,
};
void board_init_f(ulong bootflag)
{
gd_t gd_data, *id;
bd_t *bd;
init_fnc_t **init_fnc_ptr;
ulong addr, addr_sp, len = (ulong)&uboot_end - CONFIG_SYS_MONITOR_BASE;
ulong *s;
#ifdef CONFIG_PURPLE
void copy_code (ulong);
#endif
/* Pointer is writable since we allocated a register for it.
*/
gd = &gd_data;
/* compiler optimization barrier needed for GCC >= 3.4 */
__asm__ __volatile__("": : :"memory");
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.
*/
addr = CONFIG_SYS_SDRAM_BASE + gd->ram_size;
/* We can reserve some RAM "on top" here.
*/
/* round down to next 4 kB limit.
*/
addr &= ~(4096 - 1);
debug ("Top of RAM usable for U-Boot at: %08lx\n", addr);
/* Reserve memory for U-Boot code, data & bss
* round down to next 16 kB limit
*/
addr -= len;
addr &= ~(16 * 1024 - 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 %zu Bytes for Board Info at: %08lx\n",
sizeof(bd_t), addr_sp);
addr_sp -= sizeof(gd_t);
id = (gd_t *)addr_sp;
debug ("Reserving %zu Bytes for Global Data at: %08lx\n",
sizeof (gd_t), addr_sp);
/* Reserve memory for boot params.
*/
addr_sp -= CONFIG_SYS_BOOTPARAMS_LEN;
bd->bi_boot_params = addr_sp;
debug ("Reserving %dk for boot params() at: %08lx\n",
CONFIG_SYS_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;
s = (ulong *)addr_sp;
*s-- = 0;
*s-- = 0;
addr_sp = (ulong)s;
debug ("Stack Pointer at: %08lx\n", addr_sp);
/*
* Save local variables to board info struct
*/
bd->bi_memstart = CONFIG_SYS_SDRAM_BASE; /* start of DRAM memory */
bd->bi_memsize = gd->ram_size; /* size of DRAM memory in bytes */
bd->bi_baudrate = gd->baudrate; /* Console Baudrate */
memcpy (id, (void *)gd, sizeof (gd_t));
/* On the purple board we copy the code in a special way
* in order to solve flash problems
*/
#ifdef CONFIG_PURPLE
copy_code(addr);
#endif
relocate_code (addr_sp, id, addr);
/* NOTREACHED - relocate_code() 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)
{
#ifndef CONFIG_SYS_NO_FLASH
ulong size;
#endif
extern void malloc_bin_reloc (void);
#ifndef CONFIG_ENV_IS_NOWHERE
extern char * env_name_spec;
#endif
char *s;
bd_t *bd;
gd = id;
gd->flags |= GD_FLG_RELOC; /* tell others: relocation done */
debug ("Now running in RAM - U-Boot at: %08lx\n", dest_addr);
gd->reloc_off = dest_addr - CONFIG_SYS_MONITOR_BASE;
monitor_flash_len = (ulong)&uboot_end_data - dest_addr;
#if defined(CONFIG_NEEDS_MANUAL_RELOC)
/*
* We have to relocate the command table manually
*/
fixup_cmdtable(&__u_boot_cmd_start,
(ulong)(&__u_boot_cmd_end - &__u_boot_cmd_start));
#endif /* defined(CONFIG_NEEDS_MANUAL_RELOC) */
/* there are some other pointer constants we must deal with */
#ifndef CONFIG_ENV_IS_NOWHERE
env_name_spec += gd->reloc_off;
#endif
bd = gd->bd;
/* The Malloc area is immediately below the monitor copy in DRAM */
mem_malloc_init(CONFIG_SYS_MONITOR_BASE + gd->reloc_off -
TOTAL_MALLOC_LEN, TOTAL_MALLOC_LEN);
malloc_bin_reloc();
#ifndef CONFIG_SYS_NO_FLASH
/* configure available FLASH banks */
size = flash_init();
display_flash_config (size);
bd->bi_flashsize = size;
#endif
bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
#if CONFIG_SYS_MONITOR_BASE == CONFIG_SYS_FLASH_BASE
bd->bi_flashoffset = monitor_flash_len; /* reserved area for U-Boot */
#else
bd->bi_flashoffset = 0;
#endif
#ifdef CONFIG_CMD_NAND
puts ("NAND: ");
nand_init (); /* go init the NAND */
#endif
#if defined(CONFIG_CMD_ONENAND)
onenand_init();
#endif
/* relocate environment function pointers etc. */
env_relocate();
/* IP Address */
bd->bi_ip_addr = getenv_IPaddr("ipaddr");
#if defined(CONFIG_PCI)
/*
* Do pci configuration
*/
pci_init();
#endif
/** leave this here (after malloc(), environment and PCI are working) **/
/* Initialize stdio devices */
stdio_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 defined(CONFIG_CMD_NET)
if ((s = getenv ("bootfile")) != NULL) {
copy_filename (BootFile, s, sizeof (BootFile));
}
#endif
#ifdef CONFIG_CMD_SPI
puts ("SPI: ");
spi_init (); /* go init the SPI */
puts ("ready\n");
#endif
#if defined(CONFIG_MISC_INIT_R)
/* miscellaneous platform dependent initialisations */
misc_init_r ();
#endif
#ifdef CONFIG_BITBANGMII
bb_miiphy_init();
#endif
#if defined(CONFIG_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 (;;);
}