fdt_support.c 34 KB
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/*
 * (C) Copyright 2007
 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
 *
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 * Copyright 2010-2011 Freescale Semiconductor, Inc.
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 *
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 * 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>
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#include <stdio_dev.h>
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#include <linux/ctype.h>
#include <linux/types.h>
#include <asm/global_data.h>
#include <fdt.h>
#include <libfdt.h>
#include <fdt_support.h>
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#include <exports.h>
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/*
 * Global data (for the gd->bd)
 */
DECLARE_GLOBAL_DATA_PTR;

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/**
 * fdt_getprop_u32_default - Find a node and return it's property or a default
 *
 * @fdt: ptr to device tree
 * @path: path of node
 * @prop: property name
 * @dflt: default value if the property isn't found
 *
 * Convenience function to find a node and return it's property or a
 * default value if it doesn't exist.
 */
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u32 fdt_getprop_u32_default(const void *fdt, const char *path,
				const char *prop, const u32 dflt)
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{
	const u32 *val;
	int off;

	off = fdt_path_offset(fdt, path);
	if (off < 0)
		return dflt;

	val = fdt_getprop(fdt, off, prop, NULL);
	if (val)
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		return fdt32_to_cpu(*val);
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	else
		return dflt;
}
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/**
 * fdt_find_and_setprop: Find a node and set it's property
 *
 * @fdt: ptr to device tree
 * @node: path of node
 * @prop: property name
 * @val: ptr to new value
 * @len: length of new property value
 * @create: flag to create the property if it doesn't exist
 *
 * Convenience function to directly set a property given the path to the node.
 */
int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
			 const void *val, int len, int create)
{
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	int nodeoff = fdt_path_offset(fdt, node);
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	if (nodeoff < 0)
		return nodeoff;

	if ((!create) && (fdt_get_property(fdt, nodeoff, prop, 0) == NULL))
		return 0; /* create flag not set; so exit quietly */

	return fdt_setprop(fdt, nodeoff, prop, val, len);
}

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#ifdef CONFIG_OF_STDOUT_VIA_ALIAS
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#ifdef CONFIG_SERIAL_MULTI
static void fdt_fill_multisername(char *sername, size_t maxlen)
{
	const char *outname = stdio_devices[stdout]->name;

	if (strcmp(outname, "serial") > 0)
		strncpy(sername, outname, maxlen);

	/* eserial? */
	if (strcmp(outname + 1, "serial") > 0)
		strncpy(sername, outname + 1, maxlen);
}
#else
static inline void fdt_fill_multisername(char *sername, size_t maxlen) {}
#endif /* CONFIG_SERIAL_MULTI */

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static int fdt_fixup_stdout(void *fdt, int chosenoff)
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{
	int err = 0;
#ifdef CONFIG_CONS_INDEX
	int node;
	char sername[9] = { 0 };
	const char *path;

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	fdt_fill_multisername(sername, sizeof(sername) - 1);
	if (!sername[0])
		sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1);
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	err = node = fdt_path_offset(fdt, "/aliases");
	if (node >= 0) {
		int len;
		path = fdt_getprop(fdt, node, sername, &len);
		if (path) {
			char *p = malloc(len);
			err = -FDT_ERR_NOSPACE;
			if (p) {
				memcpy(p, path, len);
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				err = fdt_setprop(fdt, chosenoff,
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					"linux,stdout-path", p, len);
				free(p);
			}
		} else {
			err = len;
		}
	}
#endif
	if (err < 0)
		printf("WARNING: could not set linux,stdout-path %s.\n",
				fdt_strerror(err));

	return err;
}
#endif

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int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end, int force)
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{
	int   nodeoffset;
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	int   err, j, total;
	u32   tmp;
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	const char *path;
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	uint64_t addr, size;
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	/* Find the "chosen" node.  */
	nodeoffset = fdt_path_offset (fdt, "/chosen");

	/* If there is no "chosen" node in the blob return */
	if (nodeoffset < 0) {
		printf("fdt_initrd: %s\n", fdt_strerror(nodeoffset));
		return nodeoffset;
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	}

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	/* just return if initrd_start/end aren't valid */
	if ((initrd_start == 0) || (initrd_end == 0))
		return 0;
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	total = fdt_num_mem_rsv(fdt);

	/*
	 * Look for an existing entry and update it.  If we don't find
	 * the entry, we will j be the next available slot.
	 */
	for (j = 0; j < total; j++) {
		err = fdt_get_mem_rsv(fdt, j, &addr, &size);
		if (addr == initrd_start) {
			fdt_del_mem_rsv(fdt, j);
			break;
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		}
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	}
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	err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start);
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	if (err < 0) {
		printf("fdt_initrd: %s\n", fdt_strerror(err));
		return err;
	}

	path = fdt_getprop(fdt, nodeoffset, "linux,initrd-start", NULL);
	if ((path == NULL) || force) {
		tmp = __cpu_to_be32(initrd_start);
		err = fdt_setprop(fdt, nodeoffset,
			"linux,initrd-start", &tmp, sizeof(tmp));
		if (err < 0) {
			printf("WARNING: "
				"could not set linux,initrd-start %s.\n",
				fdt_strerror(err));
			return err;
		}
		tmp = __cpu_to_be32(initrd_end);
		err = fdt_setprop(fdt, nodeoffset,
			"linux,initrd-end", &tmp, sizeof(tmp));
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		if (err < 0) {
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			printf("WARNING: could not set linux,initrd-end %s.\n",
				fdt_strerror(err));

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			return err;
		}
	}

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	return 0;
}

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int fdt_chosen(void *fdt, int force)
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{
	int   nodeoffset;
	int   err;
	char  *str;		/* used to set string properties */
	const char *path;

	err = fdt_check_header(fdt);
	if (err < 0) {
		printf("fdt_chosen: %s\n", fdt_strerror(err));
		return err;
	}

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	/*
	 * Find the "chosen" node.
	 */
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	nodeoffset = fdt_path_offset (fdt, "/chosen");
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	/*
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	 * If there is no "chosen" node in the blob, create it.
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	 */
	if (nodeoffset < 0) {
		/*
		 * Create a new node "/chosen" (offset 0 is root level)
		 */
		nodeoffset = fdt_add_subnode(fdt, 0, "chosen");
		if (nodeoffset < 0) {
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			printf("WARNING: could not create /chosen %s.\n",
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				fdt_strerror(nodeoffset));
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			return nodeoffset;
		}
	}

	/*
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	 * Create /chosen properites that don't exist in the fdt.
	 * If the property exists, update it only if the "force" parameter
	 * is true.
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	 */
	str = getenv("bootargs");
	if (str != NULL) {
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		path = fdt_getprop(fdt, nodeoffset, "bootargs", NULL);
		if ((path == NULL) || force) {
			err = fdt_setprop(fdt, nodeoffset,
				"bootargs", str, strlen(str)+1);
			if (err < 0)
				printf("WARNING: could not set bootargs %s.\n",
					fdt_strerror(err));
		}
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	}
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#ifdef CONFIG_OF_STDOUT_VIA_ALIAS
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	path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL);
	if ((path == NULL) || force)
		err = fdt_fixup_stdout(fdt, nodeoffset);
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#endif

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#ifdef OF_STDOUT_PATH
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	path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL);
	if ((path == NULL) || force) {
		err = fdt_setprop(fdt, nodeoffset,
			"linux,stdout-path", OF_STDOUT_PATH, strlen(OF_STDOUT_PATH)+1);
		if (err < 0)
			printf("WARNING: could not set linux,stdout-path %s.\n",
				fdt_strerror(err));
	}
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#endif

	return err;
}

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void do_fixup_by_path(void *fdt, const char *path, const char *prop,
		      const void *val, int len, int create)
{
#if defined(DEBUG)
	int i;
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	debug("Updating property '%s/%s' = ", path, prop);
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	for (i = 0; i < len; i++)
		debug(" %.2x", *(u8*)(val+i));
	debug("\n");
#endif
	int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create);
	if (rc)
		printf("Unable to update property %s:%s, err=%s\n",
			path, prop, fdt_strerror(rc));
}

void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
			  u32 val, int create)
{
	val = cpu_to_fdt32(val);
	do_fixup_by_path(fdt, path, prop, &val, sizeof(val), create);
}

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void do_fixup_by_prop(void *fdt,
		      const char *pname, const void *pval, int plen,
		      const char *prop, const void *val, int len,
		      int create)
{
	int off;
#if defined(DEBUG)
	int i;
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	debug("Updating property '%s' = ", prop);
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	for (i = 0; i < len; i++)
		debug(" %.2x", *(u8*)(val+i));
	debug("\n");
#endif
	off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen);
	while (off != -FDT_ERR_NOTFOUND) {
		if (create || (fdt_get_property(fdt, off, prop, 0) != NULL))
			fdt_setprop(fdt, off, prop, val, len);
		off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen);
	}
}

void do_fixup_by_prop_u32(void *fdt,
			  const char *pname, const void *pval, int plen,
			  const char *prop, u32 val, int create)
{
	val = cpu_to_fdt32(val);
	do_fixup_by_prop(fdt, pname, pval, plen, prop, &val, 4, create);
}

void do_fixup_by_compat(void *fdt, const char *compat,
			const char *prop, const void *val, int len, int create)
{
	int off = -1;
#if defined(DEBUG)
	int i;
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	debug("Updating property '%s' = ", prop);
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	for (i = 0; i < len; i++)
		debug(" %.2x", *(u8*)(val+i));
	debug("\n");
#endif
	off = fdt_node_offset_by_compatible(fdt, -1, compat);
	while (off != -FDT_ERR_NOTFOUND) {
		if (create || (fdt_get_property(fdt, off, prop, 0) != NULL))
			fdt_setprop(fdt, off, prop, val, len);
		off = fdt_node_offset_by_compatible(fdt, off, compat);
	}
}

void do_fixup_by_compat_u32(void *fdt, const char *compat,
			    const char *prop, u32 val, int create)
{
	val = cpu_to_fdt32(val);
	do_fixup_by_compat(fdt, compat, prop, &val, 4, create);
}

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/*
 * Get cells len in bytes
 *     if #NNNN-cells property is 2 then len is 8
 *     otherwise len is 4
 */
static int get_cells_len(void *blob, char *nr_cells_name)
{
	const u32 *cell;

	cell = fdt_getprop(blob, 0, nr_cells_name, NULL);
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	if (cell && fdt32_to_cpu(*cell) == 2)
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		return 8;

	return 4;
}

/*
 * Write a 4 or 8 byte big endian cell
 */
static void write_cell(u8 *addr, u64 val, int size)
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{
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	int shift = (size - 1) * 8;
	while (size-- > 0) {
		*addr++ = (val >> shift) & 0xff;
		shift -= 8;
	}
}

int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks)
{
	int err, nodeoffset;
	int addr_cell_len, size_cell_len, len;
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	u8 tmp[banks * 16]; /* Up to 64-bit address + 64-bit size */
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	int bank;
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	err = fdt_check_header(blob);
	if (err < 0) {
		printf("%s: %s\n", __FUNCTION__, fdt_strerror(err));
		return err;
	}

	/* update, or add and update /memory node */
	nodeoffset = fdt_path_offset(blob, "/memory");
	if (nodeoffset < 0) {
		nodeoffset = fdt_add_subnode(blob, 0, "memory");
		if (nodeoffset < 0)
			printf("WARNING: could not create /memory: %s.\n",
					fdt_strerror(nodeoffset));
		return nodeoffset;
	}
	err = fdt_setprop(blob, nodeoffset, "device_type", "memory",
			sizeof("memory"));
	if (err < 0) {
		printf("WARNING: could not set %s %s.\n", "device_type",
				fdt_strerror(err));
		return err;
	}

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	addr_cell_len = get_cells_len(blob, "#address-cells");
	size_cell_len = get_cells_len(blob, "#size-cells");
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	for (bank = 0, len = 0; bank < banks; bank++) {
		write_cell(tmp + len, start[bank], addr_cell_len);
		len += addr_cell_len;

		write_cell(tmp + len, size[bank], size_cell_len);
		len += size_cell_len;
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	}

	err = fdt_setprop(blob, nodeoffset, "reg", tmp, len);
	if (err < 0) {
		printf("WARNING: could not set %s %s.\n",
				"reg", fdt_strerror(err));
		return err;
	}
	return 0;
}

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int fdt_fixup_memory(void *blob, u64 start, u64 size)
{
	return fdt_fixup_memory_banks(blob, &start, &size, 1);
}

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void fdt_fixup_ethernet(void *fdt)
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{
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	int node, i, j;
	char enet[16], *tmp, *end;
	char mac[16] = "ethaddr";
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	const char *path;
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	unsigned char mac_addr[6];
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	node = fdt_path_offset(fdt, "/aliases");
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	if (node < 0)
		return;

	i = 0;
	while ((tmp = getenv(mac)) != NULL) {
		sprintf(enet, "ethernet%d", i);
		path = fdt_getprop(fdt, node, enet, NULL);
		if (!path) {
			debug("No alias for %s\n", enet);
			sprintf(mac, "eth%daddr", ++i);
			continue;
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		}
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		for (j = 0; j < 6; j++) {
			mac_addr[j] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
			if (tmp)
				tmp = (*end) ? end+1 : end;
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		}
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		do_fixup_by_path(fdt, path, "mac-address", &mac_addr, 6, 0);
		do_fixup_by_path(fdt, path, "local-mac-address",
				&mac_addr, 6, 1);

		sprintf(mac, "eth%daddr", ++i);
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	}
}
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/* Resize the fdt to its actual size + a bit of padding */
int fdt_resize(void *blob)
{
	int i;
	uint64_t addr, size;
	int total, ret;
	uint actualsize;

	if (!blob)
		return 0;

	total = fdt_num_mem_rsv(blob);
	for (i = 0; i < total; i++) {
		fdt_get_mem_rsv(blob, i, &addr, &size);
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		if (addr == (uintptr_t)blob) {
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			fdt_del_mem_rsv(blob, i);
			break;
		}
	}

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	/*
	 * Calculate the actual size of the fdt
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	 * plus the size needed for 5 fdt_add_mem_rsv, one
	 * for the fdt itself and 4 for a possible initrd
	 * ((initrd-start + initrd-end) * 2 (name & value))
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	 */
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	actualsize = fdt_off_dt_strings(blob) +
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		fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry);
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	/* Make it so the fdt ends on a page boundary */
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	actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000);
	actualsize = actualsize - ((uintptr_t)blob & 0xfff);
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	/* Change the fdt header to reflect the correct size */
	fdt_set_totalsize(blob, actualsize);

	/* Add the new reservation */
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	ret = fdt_add_mem_rsv(blob, (uintptr_t)blob, actualsize);
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	if (ret < 0)
		return ret;

	return actualsize;
}
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#ifdef CONFIG_PCI
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#define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
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#define FDT_PCI_PREFETCH	(0x40000000)
#define FDT_PCI_MEM32		(0x02000000)
#define FDT_PCI_IO		(0x01000000)
#define FDT_PCI_MEM64		(0x03000000)

int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) {

	int addrcell, sizecell, len, r;
	u32 *dma_range;
	/* sized based on pci addr cells, size-cells, & address-cells */
	u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN];

	addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1);
	sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1);

	dma_range = &dma_ranges[0];
	for (r = 0; r < hose->region_count; r++) {
		u64 bus_start, phys_start, size;

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		/* skip if !PCI_REGION_SYS_MEMORY */
		if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY))
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			continue;

		bus_start = (u64)hose->regions[r].bus_start;
		phys_start = (u64)hose->regions[r].phys_start;
		size = (u64)hose->regions[r].size;

		dma_range[0] = 0;
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		if (size >= 0x100000000ull)
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			dma_range[0] |= FDT_PCI_MEM64;
		else
			dma_range[0] |= FDT_PCI_MEM32;
		if (hose->regions[r].flags & PCI_REGION_PREFETCH)
			dma_range[0] |= FDT_PCI_PREFETCH;
#ifdef CONFIG_SYS_PCI_64BIT
		dma_range[1] = bus_start >> 32;
#else
		dma_range[1] = 0;
#endif
		dma_range[2] = bus_start & 0xffffffff;

		if (addrcell == 2) {
			dma_range[3] = phys_start >> 32;
			dma_range[4] = phys_start & 0xffffffff;
		} else {
			dma_range[3] = phys_start & 0xffffffff;
		}

		if (sizecell == 2) {
			dma_range[3 + addrcell + 0] = size >> 32;
			dma_range[3 + addrcell + 1] = size & 0xffffffff;
		} else {
			dma_range[3 + addrcell + 0] = size & 0xffffffff;
		}

		dma_range += (3 + addrcell + sizecell);
	}

	len = dma_range - &dma_ranges[0];
	if (len)
		fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4);

	return 0;
}
#endif
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#ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE
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/*
 * Provide a weak default function to return the flash bank size.
 * There might be multiple non-identical flash chips connected to one
 * chip-select, so we need to pass an index as well.
 */
u32 __flash_get_bank_size(int cs, int idx)
{
	extern flash_info_t flash_info[];

	/*
	 * As default, a simple 1:1 mapping is provided. Boards with
	 * a different mapping need to supply a board specific mapping
	 * routine.
	 */
	return flash_info[cs].size;
}
u32 flash_get_bank_size(int cs, int idx)
	__attribute__((weak, alias("__flash_get_bank_size")));

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/*
 * This function can be used to update the size in the "reg" property
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 * of all NOR FLASH device nodes. This is necessary for boards with
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 * non-fixed NOR FLASH sizes.
 */
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int fdt_fixup_nor_flash_size(void *blob)
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{
	char compat[][16] = { "cfi-flash", "jedec-flash" };
	int off;
	int len;
	struct fdt_property *prop;
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	u32 *reg, *reg2;
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	int i;

	for (i = 0; i < 2; i++) {
		off = fdt_node_offset_by_compatible(blob, -1, compat[i]);
		while (off != -FDT_ERR_NOTFOUND) {
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			int idx;

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			/*
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			 * Found one compatible node, so fixup the size
			 * int its reg properties
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			 */
			prop = fdt_get_property_w(blob, off, "reg", &len);
			if (prop) {
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				int tuple_size = 3 * sizeof(reg);

				/*
				 * There might be multiple reg-tuples,
				 * so loop through them all
				 */
648 649
				reg = reg2 = (u32 *)&prop->data[0];
				for (idx = 0; idx < (len / tuple_size); idx++) {
650 651 652 653 654
					/*
					 * Update size in reg property
					 */
					reg[2] = flash_get_bank_size(reg[0],
								     idx);
655 656 657 658 659

					/*
					 * Point to next reg tuple
					 */
					reg += 3;
660
				}
661 662

				fdt_setprop(blob, off, "reg", reg2, len);
663 664 665 666 667 668 669 670
			}

			/* Move to next compatible node */
			off = fdt_node_offset_by_compatible(blob, off,
							    compat[i]);
		}
	}

671
	return 0;
672 673
}
#endif
674

675 676 677 678 679 680 681 682 683 684
int fdt_increase_size(void *fdt, int add_len)
{
	int newlen;

	newlen = fdt_totalsize(fdt) + add_len;

	/* Open in place with a new len */
	return fdt_open_into(fdt, fdt, newlen);
}

685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892
#ifdef CONFIG_FDT_FIXUP_PARTITIONS
#include <jffs2/load_kernel.h>
#include <mtd_node.h>

struct reg_cell {
	unsigned int r0;
	unsigned int r1;
};

int fdt_del_subnodes(const void *blob, int parent_offset)
{
	int off, ndepth;
	int ret;

	for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth);
	     (off >= 0) && (ndepth > 0);
	     off = fdt_next_node(blob, off, &ndepth)) {
		if (ndepth == 1) {
			debug("delete %s: offset: %x\n",
				fdt_get_name(blob, off, 0), off);
			ret = fdt_del_node((void *)blob, off);
			if (ret < 0) {
				printf("Can't delete node: %s\n",
					fdt_strerror(ret));
				return ret;
			} else {
				ndepth = 0;
				off = parent_offset;
			}
		}
	}
	return 0;
}

int fdt_del_partitions(void *blob, int parent_offset)
{
	const void *prop;
	int ndepth = 0;
	int off;
	int ret;

	off = fdt_next_node(blob, parent_offset, &ndepth);
	if (off > 0 && ndepth == 1) {
		prop = fdt_getprop(blob, off, "label", NULL);
		if (prop == NULL) {
			/*
			 * Could not find label property, nand {}; node?
			 * Check subnode, delete partitions there if any.
			 */
			return fdt_del_partitions(blob, off);
		} else {
			ret = fdt_del_subnodes(blob, parent_offset);
			if (ret < 0) {
				printf("Can't remove subnodes: %s\n",
					fdt_strerror(ret));
				return ret;
			}
		}
	}
	return 0;
}

int fdt_node_set_part_info(void *blob, int parent_offset,
			   struct mtd_device *dev)
{
	struct list_head *pentry;
	struct part_info *part;
	struct reg_cell cell;
	int off, ndepth = 0;
	int part_num, ret;
	char buf[64];

	ret = fdt_del_partitions(blob, parent_offset);
	if (ret < 0)
		return ret;

	/*
	 * Check if it is nand {}; subnode, adjust
	 * the offset in this case
	 */
	off = fdt_next_node(blob, parent_offset, &ndepth);
	if (off > 0 && ndepth == 1)
		parent_offset = off;

	part_num = 0;
	list_for_each_prev(pentry, &dev->parts) {
		int newoff;

		part = list_entry(pentry, struct part_info, link);

		debug("%2d: %-20s0x%08x\t0x%08x\t%d\n",
			part_num, part->name, part->size,
			part->offset, part->mask_flags);

		sprintf(buf, "partition@%x", part->offset);
add_sub:
		ret = fdt_add_subnode(blob, parent_offset, buf);
		if (ret == -FDT_ERR_NOSPACE) {
			ret = fdt_increase_size(blob, 512);
			if (!ret)
				goto add_sub;
			else
				goto err_size;
		} else if (ret < 0) {
			printf("Can't add partition node: %s\n",
				fdt_strerror(ret));
			return ret;
		}
		newoff = ret;

		/* Check MTD_WRITEABLE_CMD flag */
		if (part->mask_flags & 1) {
add_ro:
			ret = fdt_setprop(blob, newoff, "read_only", NULL, 0);
			if (ret == -FDT_ERR_NOSPACE) {
				ret = fdt_increase_size(blob, 512);
				if (!ret)
					goto add_ro;
				else
					goto err_size;
			} else if (ret < 0)
				goto err_prop;
		}

		cell.r0 = cpu_to_fdt32(part->offset);
		cell.r1 = cpu_to_fdt32(part->size);
add_reg:
		ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell));
		if (ret == -FDT_ERR_NOSPACE) {
			ret = fdt_increase_size(blob, 512);
			if (!ret)
				goto add_reg;
			else
				goto err_size;
		} else if (ret < 0)
			goto err_prop;

add_label:
		ret = fdt_setprop_string(blob, newoff, "label", part->name);
		if (ret == -FDT_ERR_NOSPACE) {
			ret = fdt_increase_size(blob, 512);
			if (!ret)
				goto add_label;
			else
				goto err_size;
		} else if (ret < 0)
			goto err_prop;

		part_num++;
	}
	return 0;
err_size:
	printf("Can't increase blob size: %s\n", fdt_strerror(ret));
	return ret;
err_prop:
	printf("Can't add property: %s\n", fdt_strerror(ret));
	return ret;
}

/*
 * Update partitions in nor/nand nodes using info from
 * mtdparts environment variable. The nodes to update are
 * specified by node_info structure which contains mtd device
 * type and compatible string: E. g. the board code in
 * ft_board_setup() could use:
 *
 *	struct node_info nodes[] = {
 *		{ "fsl,mpc5121-nfc",    MTD_DEV_TYPE_NAND, },
 *		{ "cfi-flash",          MTD_DEV_TYPE_NOR,  },
 *	};
 *
 *	fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
 */
void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size)
{
	struct node_info *ni = node_info;
	struct mtd_device *dev;
	char *parts;
	int i, idx;
	int noff;

	parts = getenv("mtdparts");
	if (!parts)
		return;

	if (mtdparts_init() != 0)
		return;

	for (i = 0; i < node_info_size; i++) {
		idx = 0;
		noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat);
		while (noff != -FDT_ERR_NOTFOUND) {
			debug("%s: %s, mtd dev type %d\n",
				fdt_get_name(blob, noff, 0),
				ni[i].compat, ni[i].type);
			dev = device_find(ni[i].type, idx++);
			if (dev) {
				if (fdt_node_set_part_info(blob, noff, dev))
					return; /* return on error */
			}

			/* Jump to next flash node */
			noff = fdt_node_offset_by_compatible(blob, noff,
							     ni[i].compat);
		}
	}
}
#endif
893 894 895 896 897 898 899 900 901 902 903 904 905

void fdt_del_node_and_alias(void *blob, const char *alias)
{
	int off = fdt_path_offset(blob, alias);

	if (off < 0)
		return;

	fdt_del_node(blob, off);

	off = fdt_path_offset(blob, "/aliases");
	fdt_delprop(blob, off, alias);
}
906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940

/* Helper to read a big number; size is in cells (not bytes) */
static inline u64 of_read_number(const __be32 *cell, int size)
{
	u64 r = 0;
	while (size--)
		r = (r << 32) | be32_to_cpu(*(cell++));
	return r;
}

#define PRu64	"%llx"

/* Max address size we deal with */
#define OF_MAX_ADDR_CELLS	4
#define OF_BAD_ADDR	((u64)-1)
#define OF_CHECK_COUNTS(na, ns)	((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
			(ns) > 0)

/* Debug utility */
#ifdef DEBUG
static void of_dump_addr(const char *s, const u32 *addr, int na)
{
	printf("%s", s);
	while(na--)
		printf(" %08x", *(addr++));
	printf("\n");
}
#else
static void of_dump_addr(const char *s, const u32 *addr, int na) { }
#endif

/* Callbacks for bus specific translators */
struct of_bus {
	const char	*name;
	const char	*addresses;
941
	void		(*count_cells)(void *blob, int parentoffset,
942 943 944 945 946 947 948
				int *addrc, int *sizec);
	u64		(*map)(u32 *addr, const u32 *range,
				int na, int ns, int pna);
	int		(*translate)(u32 *addr, u64 offset, int na);
};

/* Default translator (generic bus) */
949
static void of_bus_default_count_cells(void *blob, int parentoffset,
950 951
					int *addrc, int *sizec)
{
952 953 954 955 956
	const u32 *prop;

	if (addrc) {
		prop = fdt_getprop(blob, parentoffset, "#address-cells", NULL);
		if (prop)
957
			*addrc = be32_to_cpup((u32 *)prop);
958 959 960 961 962 963 964
		else
			*addrc = 2;
	}

	if (sizec) {
		prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL);
		if (prop)
965
			*sizec = be32_to_cpup((u32 *)prop);
966 967 968
		else
			*sizec = 1;
	}
969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093
}

static u64 of_bus_default_map(u32 *addr, const u32 *range,
		int na, int ns, int pna)
{
	u64 cp, s, da;

	cp = of_read_number(range, na);
	s  = of_read_number(range + na + pna, ns);
	da = of_read_number(addr, na);

	debug("OF: default map, cp="PRu64", s="PRu64", da="PRu64"\n",
	    cp, s, da);

	if (da < cp || da >= (cp + s))
		return OF_BAD_ADDR;
	return da - cp;
}

static int of_bus_default_translate(u32 *addr, u64 offset, int na)
{
	u64 a = of_read_number(addr, na);
	memset(addr, 0, na * 4);
	a += offset;
	if (na > 1)
		addr[na - 2] = a >> 32;
	addr[na - 1] = a & 0xffffffffu;

	return 0;
}

/* Array of bus specific translators */
static struct of_bus of_busses[] = {
	/* Default */
	{
		.name = "default",
		.addresses = "reg",
		.count_cells = of_bus_default_count_cells,
		.map = of_bus_default_map,
		.translate = of_bus_default_translate,
	},
};

static int of_translate_one(void * blob, int parent, struct of_bus *bus,
			    struct of_bus *pbus, u32 *addr,
			    int na, int ns, int pna, const char *rprop)
{
	const u32 *ranges;
	int rlen;
	int rone;
	u64 offset = OF_BAD_ADDR;

	/* Normally, an absence of a "ranges" property means we are
	 * crossing a non-translatable boundary, and thus the addresses
	 * below the current not cannot be converted to CPU physical ones.
	 * Unfortunately, while this is very clear in the spec, it's not
	 * what Apple understood, and they do have things like /uni-n or
	 * /ht nodes with no "ranges" property and a lot of perfectly
	 * useable mapped devices below them. Thus we treat the absence of
	 * "ranges" as equivalent to an empty "ranges" property which means
	 * a 1:1 translation at that level. It's up to the caller not to try
	 * to translate addresses that aren't supposed to be translated in
	 * the first place. --BenH.
	 */
	ranges = (u32 *)fdt_getprop(blob, parent, rprop, &rlen);
	if (ranges == NULL || rlen == 0) {
		offset = of_read_number(addr, na);
		memset(addr, 0, pna * 4);
		debug("OF: no ranges, 1:1 translation\n");
		goto finish;
	}

	debug("OF: walking ranges...\n");

	/* Now walk through the ranges */
	rlen /= 4;
	rone = na + pna + ns;
	for (; rlen >= rone; rlen -= rone, ranges += rone) {
		offset = bus->map(addr, ranges, na, ns, pna);
		if (offset != OF_BAD_ADDR)
			break;
	}
	if (offset == OF_BAD_ADDR) {
		debug("OF: not found !\n");
		return 1;
	}
	memcpy(addr, ranges + na, 4 * pna);

 finish:
	of_dump_addr("OF: parent translation for:", addr, pna);
	debug("OF: with offset: "PRu64"\n", offset);

	/* Translate it into parent bus space */
	return pbus->translate(addr, offset, pna);
}

/*
 * Translate an address from the device-tree into a CPU physical address,
 * this walks up the tree and applies the various bus mappings on the
 * way.
 *
 * Note: We consider that crossing any level with #size-cells == 0 to mean
 * that translation is impossible (that is we are not dealing with a value
 * that can be mapped to a cpu physical address). This is not really specified
 * that way, but this is traditionally the way IBM at least do things
 */
u64 __of_translate_address(void *blob, int node_offset, const u32 *in_addr,
			   const char *rprop)
{
	int parent;
	struct of_bus *bus, *pbus;
	u32 addr[OF_MAX_ADDR_CELLS];
	int na, ns, pna, pns;
	u64 result = OF_BAD_ADDR;

	debug("OF: ** translation for device %s **\n",
		fdt_get_name(blob, node_offset, NULL));

	/* Get parent & match bus type */
	parent = fdt_parent_offset(blob, node_offset);
	if (parent < 0)
		goto bail;
	bus = &of_busses[0];

	/* Cound address cells & copy address locally */
1094
	bus->count_cells(blob, parent, &na, &ns);
1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120
	if (!OF_CHECK_COUNTS(na, ns)) {
		printf("%s: Bad cell count for %s\n", __FUNCTION__,
		       fdt_get_name(blob, node_offset, NULL));
		goto bail;
	}
	memcpy(addr, in_addr, na * 4);

	debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
	    bus->name, na, ns, fdt_get_name(blob, parent, NULL));
	of_dump_addr("OF: translating address:", addr, na);

	/* Translate */
	for (;;) {
		/* Switch to parent bus */
		node_offset = parent;
		parent = fdt_parent_offset(blob, node_offset);

		/* If root, we have finished */
		if (parent < 0) {
			debug("OF: reached root node\n");
			result = of_read_number(addr, na);
			break;
		}

		/* Get new parent bus and counts */
		pbus = &of_busses[0];
1121
		pbus->count_cells(blob, parent, &pna, &pns);
1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151
		if (!OF_CHECK_COUNTS(pna, pns)) {
			printf("%s: Bad cell count for %s\n", __FUNCTION__,
				fdt_get_name(blob, node_offset, NULL));
			break;
		}

		debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
		    pbus->name, pna, pns, fdt_get_name(blob, parent, NULL));

		/* Apply bus translation */
		if (of_translate_one(blob, node_offset, bus, pbus,
					addr, na, ns, pna, rprop))
			break;

		/* Complete the move up one level */
		na = pna;
		ns = pns;
		bus = pbus;

		of_dump_addr("OF: one level translation:", addr, na);
	}
 bail:

	return result;
}

u64 fdt_translate_address(void *blob, int node_offset, const u32 *in_addr)
{
	return __of_translate_address(blob, node_offset, in_addr, "ranges");
}
1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177

/**
 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
 * who's reg property matches a physical cpu address
 *
 * @blob: ptr to device tree
 * @compat: compatiable string to match
 * @compat_off: property name
 *
 */
int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
					phys_addr_t compat_off)
{
	int len, off = fdt_node_offset_by_compatible(blob, -1, compat);
	while (off != -FDT_ERR_NOTFOUND) {
		u32 *reg = (u32 *)fdt_getprop(blob, off, "reg", &len);
		if (reg) {
			if (compat_off == fdt_translate_address(blob, off, reg))
				return off;
		}
		off = fdt_node_offset_by_compatible(blob, off, compat);
	}

	return -FDT_ERR_NOTFOUND;
}

1178 1179 1180 1181 1182 1183 1184
/**
 * fdt_alloc_phandle: Return next free phandle value
 *
 * @blob: ptr to device tree
 */
int fdt_alloc_phandle(void *blob)
{
1185
	int offset, phandle = 0;
1186 1187 1188

	for (offset = fdt_next_node(blob, -1, NULL); offset >= 0;
	     offset = fdt_next_node(blob, offset, NULL)) {
1189
		phandle = max(phandle, fdt_get_phandle(blob, offset));
1190
	}
1191

1192 1193
	return phandle + 1;
}
1194

1195
/*
1196
 * fdt_set_phandle: Create a phandle property for the given node
1197 1198 1199 1200
 *
 * @fdt: ptr to device tree
 * @nodeoffset: node to update
 * @phandle: phandle value to set (must be unique)
1201 1202
 */
int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle)
1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234
{
	int ret;

#ifdef DEBUG
	int off = fdt_node_offset_by_phandle(fdt, phandle);

	if ((off >= 0) && (off != nodeoffset)) {
		char buf[64];

		fdt_get_path(fdt, nodeoffset, buf, sizeof(buf));
		printf("Trying to update node %s with phandle %u ",
		       buf, phandle);

		fdt_get_path(fdt, off, buf, sizeof(buf));
		printf("that already exists in node %s.\n", buf);
		return -FDT_ERR_BADPHANDLE;
	}
#endif

	ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle);
	if (ret < 0)
		return ret;

	/*
	 * For now, also set the deprecated "linux,phandle" property, so that we
	 * don't break older kernels.
	 */
	ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle);

	return ret;
}

1235 1236 1237 1238 1239 1240
/*
 * fdt_create_phandle: Create a phandle property for the given node
 *
 * @fdt: ptr to device tree
 * @nodeoffset: node to update
 */
1241
unsigned int fdt_create_phandle(void *fdt, int nodeoffset)
1242 1243 1244 1245 1246 1247
{
	/* see if there is a phandle already */
	int phandle = fdt_get_phandle(fdt, nodeoffset);

	/* if we got 0, means no phandle so create one */
	if (phandle == 0) {
1248 1249
		int ret;

1250
		phandle = fdt_alloc_phandle(fdt);
1251 1252 1253 1254 1255 1256
		ret = fdt_set_phandle(fdt, nodeoffset, phandle);
		if (ret < 0) {
			printf("Can't set phandle %u: %s\n", phandle,
			       fdt_strerror(ret));
			return 0;
		}
1257 1258 1259 1260 1261
	}

	return phandle;
}

1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319
/*
 * fdt_set_node_status: Set status for the given node
 *
 * @fdt: ptr to device tree
 * @nodeoffset: node to update
 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
 *	    FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
 */
int fdt_set_node_status(void *fdt, int nodeoffset,
			enum fdt_status status, unsigned int error_code)
{
	char buf[16];
	int ret = 0;

	if (nodeoffset < 0)
		return nodeoffset;

	switch (status) {
	case FDT_STATUS_OKAY:
		ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay");
		break;
	case FDT_STATUS_DISABLED:
		ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled");
		break;
	case FDT_STATUS_FAIL:
		ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail");
		break;
	case FDT_STATUS_FAIL_ERROR_CODE:
		sprintf(buf, "fail-%d", error_code);
		ret = fdt_setprop_string(fdt, nodeoffset, "status", buf);
		break;
	default:
		printf("Invalid fdt status: %x\n", status);
		ret = -1;
		break;
	}

	return ret;
}

/*
 * fdt_set_status_by_alias: Set status for the given node given an alias
 *
 * @fdt: ptr to device tree
 * @alias: alias of node to update
 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
 *	    FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
 */
int fdt_set_status_by_alias(void *fdt, const char* alias,
			    enum fdt_status status, unsigned int error_code)
{
	int offset = fdt_path_offset(fdt, alias);

	return fdt_set_node_status(fdt, offset, status, error_code);
}

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#if defined(CONFIG_VIDEO)
int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf)
{
	int noff;
	int ret;

	noff = fdt_node_offset_by_compatible(blob, -1, compat);
	if (noff != -FDT_ERR_NOTFOUND) {
		debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat);
add_edid:
		ret = fdt_setprop(blob, noff, "edid", edid_buf, 128);
		if (ret == -FDT_ERR_NOSPACE) {
			ret = fdt_increase_size(blob, 512);
			if (!ret)
				goto add_edid;
			else
				goto err_size;
		} else if (ret < 0) {
			printf("Can't add property: %s\n", fdt_strerror(ret));
			return ret;
		}
	}
	return 0;
err_size:
	printf("Can't increase blob size: %s\n", fdt_strerror(ret));
	return ret;
}
#endif
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/*
 * Verify the physical address of device tree node for a given alias
 *
 * This function locates the device tree node of a given alias, and then
 * verifies that the physical address of that device matches the given
 * parameter.  It displays a message if there is a mismatch.
 *
 * Returns 1 on success, 0 on failure
 */
int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr)
{
	const char *path;
	const u32 *reg;
	int node, len;
	u64 dt_addr;

	path = fdt_getprop(fdt, anode, alias, NULL);
	if (!path) {
		/* If there's no such alias, then it's not a failure */
		return 1;
	}

	node = fdt_path_offset(fdt, path);
	if (node < 0) {
		printf("Warning: device tree alias '%s' points to invalid "
		       "node %s.\n", alias, path);
		return 0;
	}

	reg = fdt_getprop(fdt, node, "reg", &len);
	if (!reg) {
		printf("Warning: device tree node '%s' has no address.\n",
		       path);
		return 0;
	}

	dt_addr = fdt_translate_address(fdt, node, reg);
	if (addr != dt_addr) {
		printf("Warning: U-Boot configured device %s at address %llx,\n"
		       " but the device tree has it address %llx.\n",
		       alias, addr, dt_addr);
		return 0;
	}

	return 1;
}

/*
 * Returns the base address of an SOC or PCI node
 */
u64 fdt_get_base_address(void *fdt, int node)
{
	int size;
	u32 naddr;
	const u32 *prop;

	prop = fdt_getprop(fdt, node, "#address-cells", &size);
	if (prop && size == 4)
		naddr = *prop;
	else
		naddr = 2;

	prop = fdt_getprop(fdt, node, "ranges", &size);

	return prop ? fdt_translate_address(fdt, node, prop + naddr) : 0;
}