u-boot/arch/powerpc/cpu/mpc8xxx/fdt.c

/*
 * Copyright 2009 Freescale Semiconductor, Inc.
 *
 * This file is derived from arch/powerpc/cpu/mpc85xx/cpu.c and
 * arch/powerpc/cpu/mpc86xx/cpu.c. Basically this file contains
 * cpu specific common code for 85xx/86xx processors.
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <common.h>
#include <libfdt.h>
#include <fdt_support.h>

void ft_fixup_num_cores(void *blob) {
	int off, num_cores, del_cores;

	del_cores = 0;
	num_cores = cpu_numcores();

	off = fdt_node_offset_by_prop_value(blob, -1, "device_type", "cpu", 4);
	while (off != -FDT_ERR_NOTFOUND) {
		u32 *reg = (u32 *)fdt_getprop(blob, off, "reg", 0);

		/* if we find a cpu node outside of what we expect delete it
		 * and reset the offset back to the start since we can't
		 * trust the offsets anymore
		 */
		if (*reg > num_cores-1) {
			fdt_del_node(blob, off);
			del_cores++;
			off = -1;
		}
		off = fdt_node_offset_by_prop_value(blob, off,
				"device_type", "cpu", 4);
	}
	debug ("%x core system found\n", num_cores);
	debug ("deleted %d extra core entry entries from device tree\n",
								del_cores);
}