#include
#include
#include
#include
#include
#include
#if (CONFIG_COMMANDS & CFG_CMD_NAND)
void nand_init (void);
#endif
ulong monitor_flash_len;
#ifdef CONFIG_HAS_DATAFLASH
extern int AT91F_DataflashInit(void);
extern void dataflash_print_info(void);
#endif
#ifndef CONFIG_IDENT_STRING
#define CONFIG_IDENT_STRING ""
#endif
const char version_string[] =
U_BOOT_VERSION" (" __DATE__ " - " __TIME__ ")"CONFIG_IDENT_STRING;
#ifdef CONFIG_DRIVER_CS8900
extern void cs8900_get_enetaddr (uchar * addr);
#endif
#ifdef CONFIG_DRIVER_CS8900
extern void rtl8019_get_enetaddr (uchar * addr);
#endif
#ifdef CONFIG_DRIVER_LAN91C96
#include "../drivers/lan91c96.h"
#endif
/*
* 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
void mem_malloc_init (ulong dest_addr)
{
mem_malloc_start = dest_addr;
mem_malloc_end = dest_addr + CFG_MALLOC_LEN;
mem_malloc_brk = mem_malloc_start;
//将CFG_MALLOC_LEN长度地直清零
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);//返回mem_malloc_brk即new
}
/************************************************************************
* 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)
{
DECLARE_GLOBAL_DATA_PTR;
uchar tmp[64]; /* long enough for environment variables */
int i = getenv_r ("baudrate", tmp, sizeof (tmp));
gd->bd->bi_baudrate = 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 BSS: -> %08lX\n",
_armboot_start, _bss_start, _bss_end);
#ifdef CONFIG_MODEM_SUPPORT
puts ("Modem Support enabled\n");
#endif
#ifdef CONFIG_USE_IRQ
printf ("IRQ Stack: %08lx\n", IRQ_STACK_START);
printf ("FIQ Stack: %08lx\n", FIQ_STACK_START);
#endif
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 ("RAM Configuration:\n");
for(i=0; 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: "); //output"Flash"
print_size (size, "\n"); //print Flash'size
}
/*
* Breathe some life into the board...
*
* Initialize a serial port as console, and carry out some hardware
* tests.
*
* The first part of initialization is running from Flash memory;
* its 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 dependent #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 */
interrupt_init, /* set up exceptions */
env_init, /* initialize environment */
init_baudrate, /* initialze baudrate settings */
serial_init, /* serial communications setup */
console_init_f, /* stage 1 init of console */
display_banner, /* say that we are here */
dram_init, /* configure available RAM banks */
display_dram_config,
#if defined(CONFIG_VCMA9)
checkboard,
#endif
NULL,
};
void start_armboot (void)
{
DECLARE_GLOBAL_DATA_PTR;
ulong size;
init_fnc_t **init_fnc_ptr;
char *s;
#if defined(CONFIG_VFD)
unsigned long addr;
#endif
/* BeiJing HengFengRuiKe Science and Technology Co.,LTD; $(CPU)/.c */
#if CFG_LED_FLASH
LED();
#endif
/* Pointer is writable since we allocated a register for it */
gd = (gd_t*)(_armboot_start - CFG_MALLOC_LEN - sizeof(gd_t));
memset ((void*)gd, 0, sizeof (gd_t));
gd->bd = (bd_t*)((char*)gd - sizeof(bd_t));
memset (gd->bd, 0, sizeof (bd_t));
monitor_flash_len = _bss_start - _armboot_start;
for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
if ((*init_fnc_ptr)() != 0) {
hang ();
}
}
/* configure available FLASH banks */
size = flash_init ();
display_flash_config (size);
#ifdef CONFIG_VFD
# ifndef PAGE_SIZE
# define PAGE_SIZE 4096
# endif
/*
* reserve memory for VFD display (always full pages)
*/
/* armboot_end is defined in the board-specific linker script */
addr = (_bss_start + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
size = vfd_setmem (addr);
gd->fb_base = addr;
#endif /* CONFIG_VFD */
/* armboot_start is defined in the board-specific linker script */
mem_malloc_init (_armboot_start - CFG_MALLOC_LEN);
#if (CONFIG_COMMANDS & CFG_CMD_NAND)
puts ("NAND:");
nand_init(); /* go init the NAND */
#endif
#ifdef CONFIG_HAS_DATAFLASH
AT91F_DataflashInit();
dataflash_print_info();
#endif
/* initialize environment */
env_relocate ();
#ifdef CONFIG_VFD
/* must do this after the framebuffer is allocated */
drv_vfd_init();
#endif /* CONFIG_VFD */
/* IP Address */
gd->bd->bi_ip_addr = getenv_IPaddr ("ipaddr"); //get the 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) {
gd->bd->bi_enetaddr[reg] = s ? simple_strtoul (s, &e, 16) : 0;
if (s)
s = (*e) ? e + 1 : e;
}
}
devices_init (); /* get the devices list going. */
jumptable_init ();
console_init_r (); /* fully init console as a device */
#if defined(CONFIG_MISC_INIT_R)
/* miscellaneous platform dependent initialisations */
misc_init_r ();
#endif
/* enable exceptions */
enable_interrupts ();
/* Perform network card initialisation if necessary */
#ifdef CONFIG_DRIVER_CS8900
cs8900_get_enetaddr (gd->bd->bi_enetaddr);
#endif
#ifdef CONFIG_DRIVER_LAN91C96
if (getenv ("ethaddr")) {
smc_set_mac_addr(gd->bd->bi_enetaddr);
}
/* eth_hw_init(); */
#endif /* CONFIG_DRIVER_LAN91C96 */
/* 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 */
#ifdef BOARD_LATE_INIT
board_late_init ();
#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 (;;);
}
#ifdef CONFIG_MODEM_SUPPORT
/* called from main loop (common/main.c) */
extern void dbg(const char *fmt, ...);
int mdm_init (void)
{
char env_str[16];
char *init_str;
int i;
extern char console_buffer[];
static inline void mdm_readline(char *buf, int bufsiz);
extern void enable_putc(void);
extern int hwflow_onoff(int);
enable_putc(); /* enable serial_putc() */
#ifdef CONFIG_HWFLOW
init_str = getenv("mdm_flow_control");
if (init_str && (strcmp(init_str, "rts/cts") == 0))
hwflow_onoff (1);
else
hwflow_onoff(-1);
#endif
for (i = 1;;i++) {
sprintf(env_str, "mdm_init%d", i);
if ((init_str = getenv(env_str)) != NULL) {
serial_puts(init_str);
serial_puts("\n");
for(;;) {
mdm_readline(console_buffer, CFG_CBSIZE);
dbg("ini%d: [%s]", i, console_buffer);
if ((strcmp(console_buffer, "OK") == 0) ||
(strcmp(console_buffer, "ERROR") == 0)) {
dbg("ini%d: cmd done", i);
break;
} else /* in case we are originating call ... */
if (strncmp(console_buffer, "CONNECT", 7) == 0) {
dbg("ini%d: connect", i);
return 0;
}
}
} else
break; /* no init string - stop modem init */
udelay(100000);
}
udelay(100000);
/* final stage - wait for connect */
for(;i > 1;) { /* if 'i' > 1 - wait for connection
message from modem */
mdm_readline(console_buffer, CFG_CBSIZE);
dbg("ini_f: [%s]", console_buffer);
if (strncmp(console_buffer, "CONNECT", 7) == 0) {
dbg("ini_f: connected");
return 0;
}
}
return 0;
}
/* 'inline' - We have to do it fast */
static inline void mdm_readline(char *buf, int bufsiz)
{
char c;
char *p;
int n;
n = 0;
p = buf;
for(;;) {
c = serial_getc();
/* dbg("(%c)", c); */
switch(c) {
case '\r':
break;
case '\n':
*p = '\0';
return;
default:
if(n++ > bufsiz) {
*p = '\0';
return; /* sanity check */
}
*p = c;
p++;
break;
}
}
}
#endif /* CONFIG_MODEM_SUPPORT */
