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fdt: ARM: Implement and verify embedded and separate device tree

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This locates the device tree either embedded within U-Boot or attached to the
end as a separate binary.

When CONFIG_OF_CONTROL is defined, U-Boot requires a valid fdt. A check is
provided for this early in initialisation.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2011-10-24 19:15:33 +00:00 committed by Wolfgang Denk
parent b5220bc6ed
commit f5437ad141
1 changed files with 12 additions and 0 deletions
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12
arch/arm/lib/board.c
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@ -48,6 +48,8 @@
#include <nand.h>
#include <onenand_uboot.h>
#include <mmc.h>
#include <libfdt.h>
#include <fdtdec.h>
#include <post.h>
#include <logbuff.h>
@ -233,6 +235,9 @@ init_fnc_t *init_sequence[] = {
#endif
#if defined(CONFIG_BOARD_EARLY_INIT_F)
board_early_init_f,
#endif
#ifdef CONFIG_OF_CONTROL
fdtdec_check_fdt,
#endif
timer_init, /* initialize timer */
#ifdef CONFIG_FSL_ESDHC
@ -274,6 +279,13 @@ void board_init_f(ulong bootflag)
memset((void *)gd, 0, sizeof(gd_t));
gd->mon_len = _bss_end_ofs;
#ifdef CONFIG_OF_EMBED
/* Get a pointer to the FDT */
gd->fdt_blob = _binary_dt_dtb_start;
#elif defined CONFIG_OF_SEPARATE
/* FDT is at end of image */
gd->fdt_blob = (void *)(_end_ofs + _TEXT_BASE);
#endif
for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
if ((*init_fnc_ptr)() != 0) {