fdt_support.c 38.8 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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 * SPDX-License-Identifier:	GPL-2.0+
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 */

#include <common.h>
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#include <inttypes.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 <libfdt.h>
#include <fdt_support.h>
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#include <exports.h>
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#include <fdtdec.h>
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/**
 * fdt_getprop_u32_default_node - Return a node's property or a default
 *
 * @fdt: ptr to device tree
 * @off: offset of node
 * @cell: cell offset in property
 * @prop: property name
 * @dflt: default value if the property isn't found
 *
 * Convenience function to return a node's property or a default value if
 * the property doesn't exist.
 */
u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell,
				const char *prop, const u32 dflt)
{
	const fdt32_t *val;
	int len;

	val = fdt_getprop(fdt, off, prop, &len);

	/* Check if property exists */
	if (!val)
		return dflt;

	/* Check if property is long enough */
	if (len < ((cell + 1) * sizeof(uint32_t)))
		return dflt;

	return fdt32_to_cpu(*val);
}

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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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{
	int off;

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

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	return fdt_getprop_u32_default_node(fdt, off, 0, prop, dflt);
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}
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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;

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

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

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/**
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 * fdt_find_or_add_subnode() - find or possibly add a subnode of a given node
 *
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 * @fdt: pointer to the device tree blob
 * @parentoffset: structure block offset of a node
 * @name: name of the subnode to locate
 *
 * fdt_subnode_offset() finds a subnode of the node with a given name.
 * If the subnode does not exist, it will be created.
 */
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int fdt_find_or_add_subnode(void *fdt, int parentoffset, const char *name)
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{
	int offset;

	offset = fdt_subnode_offset(fdt, parentoffset, name);

	if (offset == -FDT_ERR_NOTFOUND)
		offset = fdt_add_subnode(fdt, parentoffset, name);

	if (offset < 0)
		printf("%s: %s: %s\n", __func__, name, fdt_strerror(offset));

	return offset;
}

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/* rename to CONFIG_OF_STDOUT_PATH ? */
#if defined(OF_STDOUT_PATH)
static int fdt_fixup_stdout(void *fdt, int chosenoff)
{
	return fdt_setprop(fdt, chosenoff, "linux,stdout-path",
			      OF_STDOUT_PATH, strlen(OF_STDOUT_PATH) + 1);
}
#elif defined(CONFIG_OF_STDOUT_VIA_ALIAS) && defined(CONFIG_CONS_INDEX)
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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);
}

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static int fdt_fixup_stdout(void *fdt, int chosenoff)
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{
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	int err;
	int aliasoff;
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	char sername[9] = { 0 };
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	const void *path;
	int len;
	char tmp[256]; /* long enough */
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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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	aliasoff = fdt_path_offset(fdt, "/aliases");
	if (aliasoff < 0) {
		err = aliasoff;
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		goto noalias;
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	}
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	path = fdt_getprop(fdt, aliasoff, sername, &len);
	if (!path) {
		err = len;
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		goto noalias;
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	}

	/* fdt_setprop may break "path" so we copy it to tmp buffer */
	memcpy(tmp, path, len);

	err = fdt_setprop(fdt, chosenoff, "linux,stdout-path", tmp, len);
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	if (err < 0)
		printf("WARNING: could not set linux,stdout-path %s.\n",
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		       fdt_strerror(err));
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	return err;
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noalias:
	printf("WARNING: %s: could not read %s alias: %s\n",
	       __func__, sername, fdt_strerror(err));

	return 0;
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}
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#else
static int fdt_fixup_stdout(void *fdt, int chosenoff)
{
	return 0;
}
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#endif

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static inline int fdt_setprop_uxx(void *fdt, int nodeoffset, const char *name,
				  uint64_t val, int is_u64)
{
	if (is_u64)
		return fdt_setprop_u64(fdt, nodeoffset, name, val);
	else
		return fdt_setprop_u32(fdt, nodeoffset, name, (uint32_t)val);
}

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int fdt_root(void *fdt)
{
	char *serial;
	int err;

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

	serial = getenv("serial#");
	if (serial) {
		err = fdt_setprop(fdt, 0, "serial-number", serial,
				  strlen(serial) + 1);

		if (err < 0) {
			printf("WARNING: could not set serial-number %s.\n",
			       fdt_strerror(err));
			return err;
		}
	}

	return 0;
}
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int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end)
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{
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	int   nodeoffset;
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	int   err, j, total;
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	int is_u64;
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	uint64_t addr, size;
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	/* just return if the size of initrd is zero */
	if (initrd_start == initrd_end)
		return 0;

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	/* find or create "/chosen" node. */
	nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
	if (nodeoffset < 0)
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		return nodeoffset;
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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;
	}

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	is_u64 = (fdt_address_cells(fdt, 0) == 2);
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	err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-start",
			      (uint64_t)initrd_start, is_u64);
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	if (err < 0) {
		printf("WARNING: could not set linux,initrd-start %s.\n",
		       fdt_strerror(err));
		return err;
	}
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	err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-end",
			      (uint64_t)initrd_end, is_u64);

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	if (err < 0) {
		printf("WARNING: could not set linux,initrd-end %s.\n",
		       fdt_strerror(err));
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		return err;
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	}

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	return 0;
}

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

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

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	/* find or create "/chosen" node. */
	nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
	if (nodeoffset < 0)
		return nodeoffset;
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	str = getenv("bootargs");
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	if (str) {
		err = fdt_setprop(fdt, nodeoffset, "bootargs", str,
				  strlen(str) + 1);
		if (err < 0) {
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			printf("WARNING: could not set bootargs %s.\n",
			       fdt_strerror(err));
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			return err;
		}
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	}
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	return fdt_fixup_stdout(fdt, nodeoffset);
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}

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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)
{
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	fdt32_t tmp = cpu_to_fdt32(val);
	do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create);
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}

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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) {
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		if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
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			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)
{
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	fdt32_t tmp = cpu_to_fdt32(val);
	do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create);
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}

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) {
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		if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
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			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)
{
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	fdt32_t tmp = cpu_to_fdt32(val);
	do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create);
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}

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/*
 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream
 */
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static int fdt_pack_reg(const void *fdt, void *buf, u64 *address, u64 *size,
			int n)
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{
	int i;
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	int address_cells = fdt_address_cells(fdt, 0);
	int size_cells = fdt_size_cells(fdt, 0);
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	char *p = buf;

	for (i = 0; i < n; i++) {
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		if (address_cells == 2)
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			*(fdt64_t *)p = cpu_to_fdt64(address[i]);
		else
			*(fdt32_t *)p = cpu_to_fdt32(address[i]);
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		p += 4 * address_cells;
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		if (size_cells == 2)
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			*(fdt64_t *)p = cpu_to_fdt64(size[i]);
		else
			*(fdt32_t *)p = cpu_to_fdt32(size[i]);
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		p += 4 * size_cells;
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	}

	return p - (char *)buf;
}

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#ifdef CONFIG_NR_DRAM_BANKS
#define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
#else
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#define MEMORY_BANKS_MAX 4
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#endif
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int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks)
{
	int err, nodeoffset;
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	int len;
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	u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */
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	if (banks > MEMORY_BANKS_MAX) {
		printf("%s: num banks %d exceeds hardcoded limit %d."
		       " Recompile with higher MEMORY_BANKS_MAX?\n",
		       __FUNCTION__, banks, MEMORY_BANKS_MAX);
		return -1;
	}

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

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	/* find or create "/memory" node. */
	nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory");
	if (nodeoffset < 0)
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			return nodeoffset;
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	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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	if (!banks)
		return 0;

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	len = fdt_pack_reg(blob, tmp, start, size, banks);
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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;
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	char mac[16];
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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;

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	if (!getenv("ethaddr")) {
		if (getenv("usbethaddr")) {
			strcpy(mac, "usbethaddr");
		} else {
			debug("No ethernet MAC Address defined\n");
			return;
		}
	} else {
		strcpy(mac, "ethaddr");
	}

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	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 */
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int fdt_shrink_to_minimum(void *blob)
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{
	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")));

662 663
/*
 * This function can be used to update the size in the "reg" property
664
 * of all NOR FLASH device nodes. This is necessary for boards with
665 666
 * non-fixed NOR FLASH sizes.
 */
667
int fdt_fixup_nor_flash_size(void *blob)
668 669 670 671 672
{
	char compat[][16] = { "cfi-flash", "jedec-flash" };
	int off;
	int len;
	struct fdt_property *prop;
673
	u32 *reg, *reg2;
674 675 676 677 678
	int i;

	for (i = 0; i < 2; i++) {
		off = fdt_node_offset_by_compatible(blob, -1, compat[i]);
		while (off != -FDT_ERR_NOTFOUND) {
679 680
			int idx;

681
			/*
682 683
			 * Found one compatible node, so fixup the size
			 * int its reg properties
684 685 686
			 */
			prop = fdt_get_property_w(blob, off, "reg", &len);
			if (prop) {
687 688 689 690 691 692
				int tuple_size = 3 * sizeof(reg);

				/*
				 * There might be multiple reg-tuples,
				 * so loop through them all
				 */
693 694
				reg = reg2 = (u32 *)&prop->data[0];
				for (idx = 0; idx < (len / tuple_size); idx++) {
695 696 697 698 699
					/*
					 * Update size in reg property
					 */
					reg[2] = flash_get_bank_size(reg[0],
								     idx);
700 701 702 703 704

					/*
					 * Point to next reg tuple
					 */
					reg += 3;
705
				}
706 707

				fdt_setprop(blob, off, "reg", reg2, len);
708 709 710 711 712 713 714 715
			}

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

716
	return 0;
717 718
}
#endif
719

720 721 722 723 724 725 726 727 728 729
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);
}

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
#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);

820
		debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
821 822 823
			part_num, part->name, part->size,
			part->offset, part->mask_flags);

824
		sprintf(buf, "partition@%llx", part->offset);
825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937
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
938 939 940 941 942 943 944 945 946 947 948 949 950

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);
}
951 952 953

/* Max address size we deal with */
#define OF_MAX_ADDR_CELLS	4
954
#define OF_BAD_ADDR	FDT_ADDR_T_NONE
955 956 957 958 959
#define OF_CHECK_COUNTS(na, ns)	((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
			(ns) > 0)

/* Debug utility */
#ifdef DEBUG
960
static void of_dump_addr(const char *s, const fdt32_t *addr, int na)
961 962 963 964 965 966 967
{
	printf("%s", s);
	while(na--)
		printf(" %08x", *(addr++));
	printf("\n");
}
#else
968
static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { }
969 970 971 972 973 974
#endif

/* Callbacks for bus specific translators */
struct of_bus {
	const char	*name;
	const char	*addresses;
975
	void		(*count_cells)(void *blob, int parentoffset,
976
				int *addrc, int *sizec);
977
	u64		(*map)(fdt32_t *addr, const fdt32_t *range,
978
				int na, int ns, int pna);
979
	int		(*translate)(fdt32_t *addr, u64 offset, int na);
980 981 982
};

/* Default translator (generic bus) */
983
void of_bus_default_count_cells(void *blob, int parentoffset,
984 985
					int *addrc, int *sizec)
{
986
	const fdt32_t *prop;
987

988 989
	if (addrc)
		*addrc = fdt_address_cells(blob, parentoffset);
990 991 992 993

	if (sizec) {
		prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL);
		if (prop)
994
			*sizec = be32_to_cpup(prop);
995 996 997
		else
			*sizec = 1;
	}
998 999
}

1000
static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range,
1001 1002 1003 1004 1005 1006 1007 1008
		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);

1009 1010
	debug("OF: default map, cp=%" PRIu64 ", s=%" PRIu64
	      ", da=%" PRIu64 "\n", cp, s, da);
1011 1012 1013 1014 1015 1016

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

1017
static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na)
1018 1019 1020 1021 1022
{
	u64 a = of_read_number(addr, na);
	memset(addr, 0, na * 4);
	a += offset;
	if (na > 1)
1023 1024
		addr[na - 2] = cpu_to_fdt32(a >> 32);
	addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu);
1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041

	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,
1042
			    struct of_bus *pbus, fdt32_t *addr,
1043 1044
			    int na, int ns, int pna, const char *rprop)
{
1045
	const fdt32_t *ranges;
1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061
	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.
	 */
1062
	ranges = fdt_getprop(blob, parent, rprop, &rlen);
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
	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);
1088
	debug("OF: with offset: %" PRIu64 "\n", offset);
1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103

	/* 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
 */
1104 1105
static u64 __of_translate_address(void *blob, int node_offset, const fdt32_t *in_addr,
				  const char *rprop)
1106 1107 1108
{
	int parent;
	struct of_bus *bus, *pbus;
1109
	fdt32_t addr[OF_MAX_ADDR_CELLS];
1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122
	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 */
1123
	bus->count_cells(blob, parent, &na, &ns);
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
	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];
1150
		pbus->count_cells(blob, parent, &pna, &pns);
1151 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
		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;
}

1177
u64 fdt_translate_address(void *blob, int node_offset, const fdt32_t *in_addr)
1178 1179 1180
{
	return __of_translate_address(blob, node_offset, in_addr, "ranges");
}
1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195

/**
 * 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) {
1196
		const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len);
1197 1198 1199 1200 1201 1202 1203 1204 1205 1206
		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;
}

1207 1208 1209 1210 1211 1212 1213
/**
 * fdt_alloc_phandle: Return next free phandle value
 *
 * @blob: ptr to device tree
 */
int fdt_alloc_phandle(void *blob)
{
1214 1215
	int offset;
	uint32_t phandle = 0;
1216 1217 1218

	for (offset = fdt_next_node(blob, -1, NULL); offset >= 0;
	     offset = fdt_next_node(blob, offset, NULL)) {
1219
		phandle = max(phandle, fdt_get_phandle(blob, offset));
1220
	}
1221

1222 1223
	return phandle + 1;
}
1224

1225
/*
1226
 * fdt_set_phandle: Create a phandle property for the given node
1227 1228 1229 1230
 *
 * @fdt: ptr to device tree
 * @nodeoffset: node to update
 * @phandle: phandle value to set (must be unique)
1231 1232
 */
int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle)
1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264
{
	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;
}

1265 1266 1267 1268 1269 1270
/*
 * fdt_create_phandle: Create a phandle property for the given node
 *
 * @fdt: ptr to device tree
 * @nodeoffset: node to update
 */
1271
unsigned int fdt_create_phandle(void *fdt, int nodeoffset)
1272 1273 1274 1275 1276 1277
{
	/* 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) {
1278 1279
		int ret;

1280
		phandle = fdt_alloc_phandle(fdt);
1281 1282 1283 1284 1285 1286
		ret = fdt_set_phandle(fdt, nodeoffset, phandle);
		if (ret < 0) {
			printf("Can't set phandle %u: %s\n", phandle,
			       fdt_strerror(ret));
			return 0;
		}
1287 1288 1289 1290 1291
	}

	return phandle;
}

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/*
 * 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);
}

1350
#if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
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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;
1391
	const fdt32_t *reg;
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	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) {
1417 1418 1419
		printf("Warning: U-Boot configured device %s at address %"
		       PRIx64 ",\n but the device tree has it address %"
		       PRIx64 ".\n", alias, addr, dt_addr);
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		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;
1433
	const fdt32_t *prop;
1434

1435
	naddr = fdt_address_cells(fdt, node);
1436 1437 1438 1439 1440

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

	return prop ? fdt_translate_address(fdt, node, prop + naddr) : 0;
}
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/*
 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells.
 */
static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off,
			 uint64_t *val, int cells)
{
	const fdt32_t *prop32 = &prop[cell_off];
	const fdt64_t *prop64 = (const fdt64_t *)&prop[cell_off];

	if ((cell_off + cells) > prop_len)
		return -FDT_ERR_NOSPACE;

	switch (cells) {
	case 1:
		*val = fdt32_to_cpu(*prop32);
		break;
	case 2:
		*val = fdt64_to_cpu(*prop64);
		break;
	default:
		return -FDT_ERR_NOSPACE;
	}

	return 0;
}

/**
 * fdt_read_range - Read a node's n'th range property
 *
 * @fdt: ptr to device tree
 * @node: offset of node
 * @n: range index
 * @child_addr: pointer to storage for the "child address" field
 * @addr: pointer to storage for the CPU view translated physical start
 * @len: pointer to storage for the range length
 *
 * Convenience function that reads and interprets a specific range out of
 * a number of the "ranges" property array.
 */
int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
		   uint64_t *addr, uint64_t *len)
{
	int pnode = fdt_parent_offset(fdt, node);
	const fdt32_t *ranges;
	int pacells;
	int acells;
	int scells;
	int ranges_len;
	int cell = 0;
	int r = 0;

	/*
	 * The "ranges" property is an array of
	 * { <child address> <parent address> <size in child address space> }
	 *
	 * All 3 elements can span a diffent number of cells. Fetch their size.
	 */
	pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1);
	acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1);
	scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1);

	/* Now try to get the ranges property */
	ranges = fdt_getprop(fdt, node, "ranges", &ranges_len);
	if (!ranges)
		return -FDT_ERR_NOTFOUND;
	ranges_len /= sizeof(uint32_t);

	/* Jump to the n'th entry */
	cell = n * (pacells + acells + scells);

	/* Read <child address> */
	if (child_addr) {
		r = fdt_read_prop(ranges, ranges_len, cell, child_addr,
				  acells);
		if (r)
			return r;
	}
	cell += acells;

	/* Read <parent address> */
	if (addr)
		*addr = fdt_translate_address(fdt, node, ranges + cell);
	cell += pacells;

	/* Read <size in child address space> */
	if (len) {
		r = fdt_read_prop(ranges, ranges_len, cell, len, scells);
		if (r)
			return r;
	}

	return 0;
}
1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569

/**
 * fdt_setup_simplefb_node - Fill and enable a simplefb node
 *
 * @fdt: ptr to device tree
 * @node: offset of the simplefb node
 * @base_address: framebuffer base address
 * @width: width in pixels
 * @height: height in pixels
 * @stride: bytes per line
 * @format: pixel format string
 *
 * Convenience function to fill and enable a simplefb node.
 */
int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width,
			    u32 height, u32 stride, const char *format)
{
	char name[32];
	fdt32_t cells[4];
	int i, addrc, sizec, ret;

	of_bus_default_count_cells(fdt, fdt_parent_offset(fdt, node),
				   &addrc, &sizec);
	i = 0;
	if (addrc == 2)
		cells[i++] = cpu_to_fdt32(base_address >> 32);
	cells[i++] = cpu_to_fdt32(base_address);
	if (sizec == 2)
		cells[i++] = 0;
	cells[i++] = cpu_to_fdt32(height * stride);

	ret = fdt_setprop(fdt, node, "reg", cells, sizeof(cells[0]) * i);
	if (ret < 0)
		return ret;

1570
	snprintf(name, sizeof(name), "framebuffer@%" PRIx64, base_address);
1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596
	ret = fdt_set_name(fdt, node, name);
	if (ret < 0)
		return ret;

	ret = fdt_setprop_u32(fdt, node, "width", width);
	if (ret < 0)
		return ret;

	ret = fdt_setprop_u32(fdt, node, "height", height);
	if (ret < 0)
		return ret;

	ret = fdt_setprop_u32(fdt, node, "stride", stride);
	if (ret < 0)
		return ret;

	ret = fdt_setprop_string(fdt, node, "format", format);
	if (ret < 0)
		return ret;

	ret = fdt_setprop_string(fdt, node, "status", "okay");
	if (ret < 0)
		return ret;

	return 0;
}
1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625

/*
 * Update native-mode in display-timings from display environment variable.
 * The node to update are specified by path.
 */
int fdt_fixup_display(void *blob, const char *path, const char *display)
{
	int off, toff;

	if (!display || !path)
		return -FDT_ERR_NOTFOUND;

	toff = fdt_path_offset(blob, path);
	if (toff >= 0)
		toff = fdt_subnode_offset(blob, toff, "display-timings");
	if (toff < 0)
		return toff;

	for (off = fdt_first_subnode(blob, toff);
	     off >= 0;
	     off = fdt_next_subnode(blob, off)) {
		uint32_t h = fdt_get_phandle(blob, off);
		debug("%s:0x%x\n", fdt_get_name(blob, off, NULL),
		      fdt32_to_cpu(h));
		if (strcasecmp(fdt_get_name(blob, off, NULL), display) == 0)
			return fdt_setprop_u32(blob, toff, "native-mode", h);
	}
	return toff;
}