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int i, j, nxt, len, envno, envsz;
bd_t *kbd;
void (*entry)(bd_t *bd, char *cmdline, char **fwenv, ulong top);
image_header_t *hdr = images->legacy_hdr_os;
#if defined(CONFIG_FIT)
if (!images->legacy_hdr_valid) {
fit_unsupported_reset ("ARTOS");
do_reset (cmdtp, flag, argc, argv);
}
#endif
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/*
* Booting an ARTOS kernel image + application
*/
/* this used to be the top of memory, but was wrong... */
#ifdef CONFIG_PPC
/* get stack pointer */
asm volatile ("mr %0,1" : "=r"(top) );
#endif
debug ("## Current stack ends at 0x%08lX ", top);
top -= 2048; /* just to be sure */
if (top > CFG_BOOTMAPSZ)
top = CFG_BOOTMAPSZ;
top &= ~0xF;
debug ("=> set upper limit to 0x%08lX\n", top);
/* first check the artos specific boot args, then the linux args*/
if ((s = getenv( "abootargs")) == NULL && (s = getenv ("bootargs")) == NULL)
s = "";
/* get length of cmdline, and place it */
len = strlen (s);
top = (top - (len + 1)) & ~0xF;
cmdline = (char *)top;
debug ("## cmdline at 0x%08lX ", top);
strcpy (cmdline, s);
/* copy bdinfo */
top = (top - sizeof (bd_t)) & ~0xF;
debug ("## bd at 0x%08lX ", top);
kbd = (bd_t *)top;
memcpy (kbd, gd->bd, sizeof (bd_t));
/* first find number of env entries, and their size */
envno = 0;
envsz = 0;
for (i = 0; env_get_char (i) != '\0'; i = nxt + 1) {
for (nxt = i; env_get_char (nxt) != '\0'; ++nxt)
;
envno++;
envsz += (nxt - i) + 1; /* plus trailing zero */
}
envno++; /* plus the terminating zero */
debug ("## %u envvars total size %u ", envno, envsz);
top = (top - sizeof (char **) * envno) & ~0xF;
fwenv = (char **)top;
debug ("## fwenv at 0x%08lX ", top);
top = (top - envsz) & ~0xF;
s = (char *)top;
ss = fwenv;
/* now copy them */
for (i = 0; env_get_char (i) != '\0'; i = nxt + 1) {
for (nxt = i; env_get_char (nxt) != '\0'; ++nxt)
;
*ss++ = s;
for (j = i; j < nxt; ++j)
*s++ = env_get_char (j);
*s++ = '\0';
}
*ss++ = NULL; /* terminate */
entry = (void (*)(bd_t *, char *, char **, ulong))image_get_ep (hdr);
(*entry) (kbd, cmdline, fwenv, top);
}
#endif