void logbuff_init_ptrs (void)
{
unsigned long tag, post_word;
char *s;
#ifdef CONFIG_ALT_LB_ADDR
log = (logbuff_t *)CONFIG_ALT_LH_ADDR;
lbuf = (char *)CONFIG_ALT_LB_ADDR;
#else
log = (logbuff_t *)(logbuffer_base ()) - 1;
lbuf = (char *)log->buf;
#endif
/* Set up log version */
if ((s = getenv ("logversion")) != NULL)
log_version = (int)simple_strtoul (s, NULL, 10);
if (log_version == 2)
tag = log->v2.tag;
else
tag = log->v1.tag;
post_word = post_word_load();
#ifdef CONFIG_POST
/* The post routines have setup the word so we can simply test it */
if (tag != LOGBUFF_MAGIC || (post_word & POST_COLDBOOT)) {
logbuff_reset ();
}
#else
/* No post routines, so we do our own checking */
if (tag != LOGBUFF_MAGIC || post_word != LOGBUFF_MAGIC) {
logbuff_reset ();
post_word_store (LOGBUFF_MAGIC);
}
#endif
if (log_version == 2 && (long)log->v2.start > (long)log->v2.con)
log->v2.start = log->v2.con;
/* Initialize default loglevel if present */
if ((s = getenv ("loglevel")) != NULL)
console_loglevel = (int)simple_strtoul (s, NULL, 10);
gd->flags |= GD_FLG_LOGINIT;
}
/**
* boot_ramdisk_high - relocate init ramdisk
* @lmb: pointer to lmb handle, will be used for memory mgmt
* @rd_data: ramdisk data start address
* @rd_len: ramdisk data length
* @initrd_start: pointer to a ulong variable, will hold final init ramdisk
* start address (after possible relocation)
* @initrd_end: pointer to a ulong variable, will hold final init ramdisk
* end address (after possible relocation)
*
* boot_ramdisk_high() takes a relocation hint from "initrd_high" environment
* variable and if requested ramdisk data is moved to a specified location.
*
* Initrd_start and initrd_end are set to final (after relocation) ramdisk
* start/end addresses if ramdisk image start and len were provided,
* otherwise set initrd_start and initrd_end set to zeros.
*
* returns:
* 0 - success
* -1 - failure
*/
int boot_ramdisk_high(struct lmb *lmb, ulong rd_data, ulong rd_len,
ulong *initrd_start, ulong *initrd_end)
{
char *s;
ulong initrd_high;
int initrd_copy_to_ram = 1;
if ((s = getenv("initrd_high")) != NULL) {
/* a value of "no" or a similar string will act like 0,
* turning the "load high" feature off. This is intentional.
*/
initrd_high = simple_strtoul(s, NULL, 16);
if (initrd_high == ~0)
initrd_copy_to_ram = 0;
} else {
/* not set, no restrictions to load high */
initrd_high = ~0;
}
#ifdef CONFIG_LOGBUFFER
/* Prevent initrd from overwriting logbuffer */
lmb_reserve(lmb, logbuffer_base() - LOGBUFF_OVERHEAD, LOGBUFF_RESERVE);
#endif
debug("## initrd_high = 0x%08lx, copy_to_ram = %d\n",
initrd_high, initrd_copy_to_ram);
if (rd_data) {
if (!initrd_copy_to_ram) { /* zero-copy ramdisk support */
debug(" in-place initrd\n");
*initrd_start = rd_data;
*initrd_end = rd_data + rd_len;
lmb_reserve(lmb, rd_data, rd_len);
} else {
if (initrd_high)
*initrd_start = (ulong)lmb_alloc_base(lmb,
rd_len, 0x1000, initrd_high);
else
*initrd_start = (ulong)lmb_alloc(lmb, rd_len,
0x1000);
if (*initrd_start == 0) {
puts("ramdisk - allocation error\n");
goto error;
}
bootstage_mark(BOOTSTAGE_ID_COPY_RAMDISK);
*initrd_end = *initrd_start + rd_len;
printf(" Loading Ramdisk to %08lx, end %08lx ... ",
*initrd_start, *initrd_end);
memmove_wd((void *)*initrd_start,
(void *)rd_data, rd_len, CHUNKSZ);
#ifdef CONFIG_MP
/*
* Ensure the image is flushed to memory to handle
* AMP boot scenarios in which we might not be
* HW cache coherent
*/
flush_cache((unsigned long)*initrd_start, rd_len);
#endif
puts("OK\n");
}
} else {
*initrd_start = 0;
*initrd_end = 0;
}
debug(" ramdisk load start = 0x%08lx, ramdisk load end = 0x%08lx\n",
*initrd_start, *initrd_end);
return 0;
error:
return -1;
}
