sandbox: fdt: add support for CONFIG_OF_CONTROL

This adds support for a controlling fdt, mirroring the ARM implementation.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

arch/sandbox/include/asm/global_data.h

@@ -45,6 +45,7 @@ typedef	struct global_data {
 	unsigned long	fb_base;	/* base address of frame buffer */
 	u8		*ram_buf;	/* emulated RAM buffer */
 	phys_size_t	ram_size;	/* RAM size */
+	const void	*fdt_blob;	/* Our device tree, NULL if none */
 	void		**jt;		/* jump table */
 	char		env_buf[32];	/* buffer for getenv() before reloc. */
 } gd_t;

arch/sandbox/lib/board.c

@@ -156,6 +156,14 @@ void board_init_f(ulong bootflag)
 
 	memset((void *)gd, 0, sizeof(gd_t));
 
+#if defined(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)
 			hang();