[mirror_ubuntu-eoan-kernel.git] / arch / sparc64 / kernel / prom.c

/*
 * Procedures for creating, accessing and interpreting the device tree.
 *
 * Paul Mackerras	August 1996.
 * Copyright (C) 1996-2005 Paul Mackerras.
 * 
 *  Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.
 *    {engebret|bergner}@us.ibm.com 
 *
 *  Adapted for sparc64 by David S. Miller davem@davemloft.net
 *
 *      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.
 */

#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/bootmem.h>
#include <linux/module.h>

#include <asm/prom.h>
#include <asm/oplib.h>

static struct device_node *allnodes;

int of_device_is_compatible(struct device_node *device, const char *compat)
{
	const char* cp;
	int cplen, l;

	cp = (char *) of_get_property(device, "compatible", &cplen);
	if (cp == NULL)
		return 0;
	while (cplen > 0) {
		if (strncmp(cp, compat, strlen(compat)) == 0)
			return 1;
		l = strlen(cp) + 1;
		cp += l;
		cplen -= l;
	}

	return 0;
}
EXPORT_SYMBOL(of_device_is_compatible);

struct device_node *of_get_parent(const struct device_node *node)
{
	struct device_node *np;

	if (!node)
		return NULL;

	np = node->parent;

	return np;
}
EXPORT_SYMBOL(of_get_parent);

struct device_node *of_get_next_child(const struct device_node *node,
	struct device_node *prev)
{
	struct device_node *next;

	next = prev ? prev->sibling : node->child;
	for (; next != 0; next = next->sibling) {
		break;
	}

	return next;
}
EXPORT_SYMBOL(of_get_next_child);

struct device_node *of_find_node_by_path(const char *path)
{
	struct device_node *np = allnodes;

	for (; np != 0; np = np->allnext) {
		if (np->full_name != 0 && strcmp(np->full_name, path) == 0)
			break;
	}

	return np;
}
EXPORT_SYMBOL(of_find_node_by_path);

struct device_node *of_find_node_by_phandle(phandle handle)
{
	struct device_node *np;

	for (np = allnodes; np != 0; np = np->allnext)
		if (np->node == handle)
			break;

	return np;
}
EXPORT_SYMBOL(of_find_node_by_phandle);

struct device_node *of_find_node_by_name(struct device_node *from,
	const char *name)
{
	struct device_node *np;

	np = from ? from->allnext : allnodes;
	for (; np != NULL; np = np->allnext)
		if (np->name != NULL && strcmp(np->name, name) == 0)
			break;

	return np;
}
EXPORT_SYMBOL(of_find_node_by_name);

struct device_node *of_find_node_by_type(struct device_node *from,
	const char *type)
{
	struct device_node *np;

	np = from ? from->allnext : allnodes;
	for (; np != 0; np = np->allnext)
		if (np->type != 0 && strcmp(np->type, type) == 0)
			break;

	return np;
}
EXPORT_SYMBOL(of_find_node_by_type);

struct device_node *of_find_compatible_node(struct device_node *from,
	const char *type, const char *compatible)
{
	struct device_node *np;

	np = from ? from->allnext : allnodes;
	for (; np != 0; np = np->allnext) {
		if (type != NULL
		    && !(np->type != 0 && strcmp(np->type, type) == 0))
			continue;
		if (of_device_is_compatible(np, compatible))
			break;
	}

	return np;
}
EXPORT_SYMBOL(of_find_compatible_node);

struct property *of_find_property(struct device_node *np, const char *name,
				  int *lenp)
{
	struct property *pp;

	for (pp = np->properties; pp != 0; pp = pp->next) {
		if (strcmp(pp->name, name) == 0) {
			if (lenp != 0)
				*lenp = pp->length;
			break;
		}
	}
	return pp;
}
EXPORT_SYMBOL(of_find_property);

/*
 * Find a property with a given name for a given node
 * and return the value.
 */
void *of_get_property(struct device_node *np, const char *name, int *lenp)
{
	struct property *pp = of_find_property(np,name,lenp);
	return pp ? pp->value : NULL;
}
EXPORT_SYMBOL(of_get_property);

int of_getintprop_default(struct device_node *np, const char *name, int def)
{
	struct property *prop;
	int len;

	prop = of_find_property(np, name, &len);
	if (!prop || len != 4)
		return def;

	return *(int *) prop->value;
}
EXPORT_SYMBOL(of_getintprop_default);

static unsigned int prom_early_allocated;

static void * __init prom_early_alloc(unsigned long size)
{
	void *ret;

	ret = __alloc_bootmem(size, SMP_CACHE_BYTES, 0UL);
	if (ret != NULL)
		memset(ret, 0, size);

	prom_early_allocated += size;

	return ret;
}

static int is_root_node(const struct device_node *dp)
{
	if (!dp)
		return 0;

	return (dp->parent == NULL);
}

/* The following routines deal with the black magic of fully naming a
 * node.
 *
 * Certain well known named nodes are just the simple name string.
 *
 * Actual devices have an address specifier appended to the base name
 * string, like this "foo@addr".  The "addr" can be in any number of
 * formats, and the platform plus the type of the node determine the
 * format and how it is constructed.
 *
 * For children of the ROOT node, the naming convention is fixed and
 * determined by whether this is a sun4u or sun4v system.
 *
 * For children of other nodes, it is bus type specific.  So
 * we walk up the tree until we discover a "device_type" property
 * we recognize and we go from there.
 *
 * As an example, the boot device on my workstation has a full path:
 *
 *	/pci@1e,600000/ide@d/disk@0,0:c
 */
static void __init sun4v_path_component(struct device_node *dp, char *tmp_buf)
{
	struct linux_prom64_registers *regs;
	struct property *rprop;
	u32 high_bits, low_bits, type;

	rprop = of_find_property(dp, "reg", NULL);
	if (!rprop)
		return;

	regs = rprop->value;
	if (!is_root_node(dp->parent)) {
		sprintf(tmp_buf, "%s@%x,%x",
			dp->name,
			(unsigned int) (regs->phys_addr >> 32UL),
			(unsigned int) (regs->phys_addr & 0xffffffffUL));
		return;
	}

	type = regs->phys_addr >> 60UL;
	high_bits = (regs->phys_addr >> 32UL) & 0x0fffffffUL;
	low_bits = (regs->phys_addr & 0xffffffffUL);

	if (type == 0 || type == 8) {
		const char *prefix = (type == 0) ? "m" : "i";

		if (low_bits)
			sprintf(tmp_buf, "%s@%s%x,%x",
				dp->name, prefix,
				high_bits, low_bits);
		else
			sprintf(tmp_buf, "%s@%s%x",
				dp->name,
				prefix,
				high_bits);
	} else if (type == 12) {
		sprintf(tmp_buf, "%s@%x",
			dp->name, high_bits);
	}
}

static void __init sun4u_path_component(struct device_node *dp, char *tmp_buf)
{
	struct linux_prom64_registers *regs;
	struct property *prop;

	prop = of_find_property(dp, "reg", NULL);
	if (!prop)
		return;

	regs = prop->value;
	if (!is_root_node(dp->parent)) {
		sprintf(tmp_buf, "%s@%x,%x",
			dp->name,
			(unsigned int) (regs->phys_addr >> 32UL),
			(unsigned int) (regs->phys_addr & 0xffffffffUL));
		return;
	}

	prop = of_find_property(dp, "upa-portid", NULL);
	if (!prop)
		prop = of_find_property(dp, "portid", NULL);
	if (prop) {
		unsigned long mask = 0xffffffffUL;

		if (tlb_type >= cheetah)
			mask = 0x7fffff;

		sprintf(tmp_buf, "%s@%x,%x",
			dp->name,
			*(u32 *)prop->value,
			(unsigned int) (regs->phys_addr & mask));
	}
}

/* "name@slot,offset"  */
static void __init sbus_path_component(struct device_node *dp, char *tmp_buf)
{
	struct linux_prom_registers *regs;
	struct property *prop;

	prop = of_find_property(dp, "reg", NULL);
	if (!prop)
		return;

	regs = prop->value;
	sprintf(tmp_buf, "%s@%x,%x",
		dp->name,
		regs->which_io,
		regs->phys_addr);
}

/* "name@devnum[,func]" */
static void __init pci_path_component(struct device_node *dp, char *tmp_buf)
{
	struct linux_prom_pci_registers *regs;
	struct property *prop;
	unsigned int devfn;

	prop = of_find_property(dp, "reg", NULL);
	if (!prop)
		return;

	regs = prop->value;
	devfn = (regs->phys_hi >> 8) & 0xff;
	if (devfn & 0x07) {
		sprintf(tmp_buf, "%s@%x,%x",
			dp->name,
			devfn >> 3,
			devfn & 0x07);
	} else {
		sprintf(tmp_buf, "%s@%x",
			dp->name,
			devfn >> 3);
	}
}

/* "name@UPA_PORTID,offset" */
static void __init upa_path_component(struct device_node *dp, char *tmp_buf)
{
	struct linux_prom64_registers *regs;
	struct property *prop;

	prop = of_find_property(dp, "reg", NULL);
	if (!prop)
		return;

	regs = prop->value;

	prop = of_find_property(dp, "upa-portid", NULL);
	if (!prop)
		return;

	sprintf(tmp_buf, "%s@%x,%x",
		dp->name,
		*(u32 *) prop->value,
		(unsigned int) (regs->phys_addr & 0xffffffffUL));
}

/* "name@reg" */
static void __init vdev_path_component(struct device_node *dp, char *tmp_buf)
{
	struct property *prop;
	u32 *regs;

	prop = of_find_property(dp, "reg", NULL);
	if (!prop)
		return;

	regs = prop->value;

	sprintf(tmp_buf, "%s@%x", dp->name, *regs);
}

/* "name@addrhi,addrlo" */
static void __init ebus_path_component(struct device_node *dp, char *tmp_buf)
{
	struct linux_prom64_registers *regs;
	struct property *prop;

	prop = of_find_property(dp, "reg", NULL);
	if (!prop)
		return;

	regs = prop->value;

	sprintf(tmp_buf, "%s@%x,%x",
		dp->name,
		(unsigned int) (regs->phys_addr >> 32UL),
		(unsigned int) (regs->phys_addr & 0xffffffffUL));
}

/* "name@bus,addr" */
static void __init i2c_path_component(struct device_node *dp, char *tmp_buf)
{
	struct property *prop;
	u32 *regs;

	prop = of_find_property(dp, "reg", NULL);
	if (!prop)
		return;

	regs = prop->value;

	/* This actually isn't right... should look at the #address-cells
	 * property of the i2c bus node etc. etc.
	 */
	sprintf(tmp_buf, "%s@%x,%x",
		dp->name, regs[0], regs[1]);
}

/* "name@reg0[,reg1]" */
static void __init usb_path_component(struct device_node *dp, char *tmp_buf)
{
	struct property *prop;
	u32 *regs;

	prop = of_find_property(dp, "reg", NULL);
	if (!prop)
		return;

	regs = prop->value;

	if (prop->length == sizeof(u32) || regs[1] == 1) {
		sprintf(tmp_buf, "%s@%x",
			dp->name, regs[0]);
	} else {
		sprintf(tmp_buf, "%s@%x,%x",
			dp->name, regs[0], regs[1]);
	}
}

/* "name@reg0reg1[,reg2reg3]" */
static void __init ieee1394_path_component(struct device_node *dp, char *tmp_buf)
{
	struct property *prop;
	u32 *regs;

	prop = of_find_property(dp, "reg", NULL);
	if (!prop)
		return;

	regs = prop->value;

	if (regs[2] || regs[3]) {
		sprintf(tmp_buf, "%s@%08x%08x,%04x%08x",
			dp->name, regs[0], regs[1], regs[2], regs[3]);
	} else {
		sprintf(tmp_buf, "%s@%08x%08x",
			dp->name, regs[0], regs[1]);
	}
}

static void __init __build_path_component(struct device_node *dp, char *tmp_buf)
{
	struct device_node *parent = dp->parent;

	if (parent != NULL) {
		if (!strcmp(parent->type, "pci") ||
		    !strcmp(parent->type, "pciex"))
			return pci_path_component(dp, tmp_buf);
		if (!strcmp(parent->type, "sbus"))
			return sbus_path_component(dp, tmp_buf);
		if (!strcmp(parent->type, "upa"))
			return upa_path_component(dp, tmp_buf);
		if (!strcmp(parent->type, "ebus"))
			return ebus_path_component(dp, tmp_buf);
		if (!strcmp(parent->name, "usb") ||
		    !strcmp(parent->name, "hub"))
			return usb_path_component(dp, tmp_buf);
		if (!strcmp(parent->type, "i2c"))
			return i2c_path_component(dp, tmp_buf);
		if (!strcmp(parent->type, "firewire"))
			return ieee1394_path_component(dp, tmp_buf);
		if (!strcmp(parent->type, "virtual-devices"))
			return vdev_path_component(dp, tmp_buf);

		/* "isa" is handled with platform naming */
	}

	/* Use platform naming convention.  */
	if (tlb_type == hypervisor)
		return sun4v_path_component(dp, tmp_buf);
	else
		return sun4u_path_component(dp, tmp_buf);
}

static char * __init build_path_component(struct device_node *dp)
{
	char tmp_buf[64], *n;

	tmp_buf[0] = '\0';
	__build_path_component(dp, tmp_buf);
	if (tmp_buf[0] == '\0')
		strcpy(tmp_buf, dp->name);

	n = prom_early_alloc(strlen(tmp_buf) + 1);
	strcpy(n, tmp_buf);

	return n;
}

static char * __init build_full_name(struct device_node *dp)
{
	int len, ourlen, plen;
	char *n;

	plen = strlen(dp->parent->full_name);
	ourlen = strlen(dp->path_component_name);
	len = ourlen + plen + 2;

	n = prom_early_alloc(len);
	strcpy(n, dp->parent->full_name);
	if (!is_root_node(dp->parent)) {
		strcpy(n + plen, "/");
		plen++;
	}
	strcpy(n + plen, dp->path_component_name);

	return n;
}

static struct property * __init build_one_prop(phandle node, char *prev)
{
	static struct property *tmp = NULL;
	struct property *p;

	if (tmp) {
		p = tmp;
		memset(p, 0, sizeof(*p) + 32);
		tmp = NULL;
	} else
		p = prom_early_alloc(sizeof(struct property) + 32);

	p->name = (char *) (p + 1);
	if (prev == NULL) {
		prom_firstprop(node, p->name);
	} else {
		prom_nextprop(node, prev, p->name);
	}
	if (strlen(p->name) == 0) {
		tmp = p;
		return NULL;
	}
	p->length = prom_getproplen(node, p->name);
	if (p->length <= 0) {
		p->length = 0;
	} else {
		p->value = prom_early_alloc(p->length);
		prom_getproperty(node, p->name, p->value, p->length);
	}
	return p;
}

static struct property * __init build_prop_list(phandle node)
{
	struct property *head, *tail;

	head = tail = build_one_prop(node, NULL);
	while(tail) {
		tail->next = build_one_prop(node, tail->name);
		tail = tail->next;
	}

	return head;
}

static char * __init get_one_property(phandle node, const char *name)
{
	char *buf = "<NULL>";
	int len;

	len = prom_getproplen(node, name);
	if (len > 0) {
		buf = prom_early_alloc(len);
		prom_getproperty(node, name, buf, len);
	}

	return buf;
}

static struct device_node * __init create_node(phandle node)
{
	struct device_node *dp;

	if (!node)
		return NULL;

	dp = prom_early_alloc(sizeof(*dp));

	kref_init(&dp->kref);

	dp->name = get_one_property(node, "name");
	dp->type = get_one_property(node, "device_type");
	dp->node = node;

	/* Build interrupts later... */

	dp->properties = build_prop_list(node);

	return dp;
}

static struct device_node * __init build_tree(struct device_node *parent, phandle node, struct device_node ***nextp)
{
	struct device_node *dp;

	dp = create_node(node);
	if (dp) {
		*(*nextp) = dp;
		*nextp = &dp->allnext;

		dp->parent = parent;
		dp->path_component_name = build_path_component(dp);
		dp->full_name = build_full_name(dp);

		dp->child = build_tree(dp, prom_getchild(node), nextp);

		dp->sibling = build_tree(parent, prom_getsibling(node), nextp);
	}

	return dp;
}

void __init prom_build_devicetree(void)
{
	struct device_node **nextp;

	allnodes = create_node(prom_root_node);
	allnodes->path_component_name = "";
	allnodes->full_name = "/";

	nextp = &allnodes->allnext;
	allnodes->child = build_tree(allnodes,
				     prom_getchild(allnodes->node),
				     &nextp);
	printk("PROM: Built device tree with %u bytes of memory.\n",
	       prom_early_allocated);
}
Commit	Line	Data
372b07bb DM	1	/*
	2	* Procedures for creating, accessing and interpreting the device tree.
	3	*
	4	* Paul Mackerras August 1996.
	5	* Copyright (C) 1996-2005 Paul Mackerras.
	6	*
	7	* Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.
	8	* {engebret\|bergner}@us.ibm.com
	9	*
	10	* Adapted for sparc64 by David S. Miller davem@davemloft.net
	11	*
	12	* This program is free software; you can redistribute it and/or
	13	* modify it under the terms of the GNU General Public License
	14	* as published by the Free Software Foundation; either version
	15	* 2 of the License, or (at your option) any later version.
	16	*/
	17
	18	#include <linux/kernel.h>
	19	#include <linux/types.h>
	20	#include <linux/string.h>
	21	#include <linux/mm.h>
	22	#include <linux/bootmem.h>
de8d28b1	23	#include <linux/module.h>
372b07bb DM	24
	25	#include <asm/prom.h>
	26	#include <asm/oplib.h>
	27
	28	static struct device_node *allnodes;
	29
8cd24ed4 DM	30	int of_device_is_compatible(struct device_node device, const char compat)
	31	{
	32	const char* cp;
	33	int cplen, l;
	34
	35	cp = (char *) of_get_property(device, "compatible", &cplen);
	36	if (cp == NULL)
	37	return 0;
	38	while (cplen > 0) {
	39	if (strncmp(cp, compat, strlen(compat)) == 0)
	40	return 1;
	41	l = strlen(cp) + 1;
	42	cp += l;
	43	cplen -= l;
	44	}
	45
	46	return 0;
	47	}
	48	EXPORT_SYMBOL(of_device_is_compatible);
	49
372b07bb DM	50	struct device_node of_get_parent(const struct device_node node)
	51	{
	52	struct device_node *np;
	53
	54	if (!node)
	55	return NULL;
	56
	57	np = node->parent;
	58
	59	return np;
	60	}
8cd24ed4	61	EXPORT_SYMBOL(of_get_parent);
372b07bb DM	62
	63	struct device_node of_get_next_child(const struct device_node node,
	64	struct device_node *prev)
	65	{
	66	struct device_node *next;
	67
	68	next = prev ? prev->sibling : node->child;
	69	for (; next != 0; next = next->sibling) {
	70	break;
	71	}
	72
	73	return next;
	74	}
8cd24ed4	75	EXPORT_SYMBOL(of_get_next_child);
372b07bb DM	76
	77	struct device_node of_find_node_by_path(const char path)
	78	{
	79	struct device_node *np = allnodes;
	80
	81	for (; np != 0; np = np->allnext) {
	82	if (np->full_name != 0 && strcmp(np->full_name, path) == 0)
	83	break;
	84	}
	85
	86	return np;
	87	}
690c8fd3	88	EXPORT_SYMBOL(of_find_node_by_path);
372b07bb	89
de8d28b1 DM	90	struct device_node *of_find_node_by_phandle(phandle handle)
	91	{
	92	struct device_node *np;
	93
	94	for (np = allnodes; np != 0; np = np->allnext)
	95	if (np->node == handle)
	96	break;
	97
	98	return np;
	99	}
8cd24ed4	100	EXPORT_SYMBOL(of_find_node_by_phandle);
de8d28b1	101
aaf7cec2 DM	102	struct device_node of_find_node_by_name(struct device_node from,
	103	const char *name)
	104	{
	105	struct device_node *np;
	106
	107	np = from ? from->allnext : allnodes;
	108	for (; np != NULL; np = np->allnext)
	109	if (np->name != NULL && strcmp(np->name, name) == 0)
	110	break;
	111
	112	return np;
	113	}
8cd24ed4	114	EXPORT_SYMBOL(of_find_node_by_name);
aaf7cec2 DM	115
	116	struct device_node of_find_node_by_type(struct device_node from,
	117	const char *type)
	118	{
	119	struct device_node *np;
	120
	121	np = from ? from->allnext : allnodes;
	122	for (; np != 0; np = np->allnext)
	123	if (np->type != 0 && strcmp(np->type, type) == 0)
	124	break;
	125
	126	return np;
	127	}
8cd24ed4 DM	128	EXPORT_SYMBOL(of_find_node_by_type);
	129
	130	struct device_node of_find_compatible_node(struct device_node from,
	131	const char type, const char compatible)
	132	{
	133	struct device_node *np;
	134
	135	np = from ? from->allnext : allnodes;
	136	for (; np != 0; np = np->allnext) {
	137	if (type != NULL
	138	&& !(np->type != 0 && strcmp(np->type, type) == 0))
	139	continue;
	140	if (of_device_is_compatible(np, compatible))
	141	break;
	142	}
	143
	144	return np;
	145	}
	146	EXPORT_SYMBOL(of_find_compatible_node);
aaf7cec2	147
372b07bb DM	148	struct property of_find_property(struct device_node np, const char *name,
	149	int *lenp)
	150	{
	151	struct property *pp;
	152
	153	for (pp = np->properties; pp != 0; pp = pp->next) {
	154	if (strcmp(pp->name, name) == 0) {
	155	if (lenp != 0)
	156	*lenp = pp->length;
	157	break;
	158	}
	159	}
	160	return pp;
	161	}
de8d28b1 DM	162	EXPORT_SYMBOL(of_find_property);
	163
	164	/*
	165	* Find a property with a given name for a given node
	166	* and return the value.
	167	*/
	168	void of_get_property(struct device_node np, const char name, int lenp)
	169	{
	170	struct property *pp = of_find_property(np,name,lenp);
	171	return pp ? pp->value : NULL;
	172	}
	173	EXPORT_SYMBOL(of_get_property);
372b07bb	174
6d307724 DM	175	int of_getintprop_default(struct device_node np, const char name, int def)
	176	{
	177	struct property *prop;
	178	int len;
	179
	180	prop = of_find_property(np, name, &len);
	181	if (!prop \|\| len != 4)
	182	return def;
	183
	184	return (int ) prop->value;
	185	}
de8d28b1	186	EXPORT_SYMBOL(of_getintprop_default);
6d307724	187
372b07bb DM	188	static unsigned int prom_early_allocated;
	189
	190	static void * __init prom_early_alloc(unsigned long size)
	191	{
	192	void *ret;
	193
	194	ret = __alloc_bootmem(size, SMP_CACHE_BYTES, 0UL);
	195	if (ret != NULL)
	196	memset(ret, 0, size);
	197
	198	prom_early_allocated += size;
	199
	200	return ret;
	201	}
	202
	203	static int is_root_node(const struct device_node *dp)
	204	{
	205	if (!dp)
	206	return 0;
	207
	208	return (dp->parent == NULL);
	209	}
	210
	211	/* The following routines deal with the black magic of fully naming a
	212	* node.
	213	*
	214	* Certain well known named nodes are just the simple name string.
	215	*
	216	* Actual devices have an address specifier appended to the base name
	217	* string, like this "foo@addr". The "addr" can be in any number of
	218	* formats, and the platform plus the type of the node determine the
	219	* format and how it is constructed.
	220	*
	221	* For children of the ROOT node, the naming convention is fixed and
	222	* determined by whether this is a sun4u or sun4v system.
	223	*
	224	* For children of other nodes, it is bus type specific. So
	225	* we walk up the tree until we discover a "device_type" property
	226	* we recognize and we go from there.
	227	*
	228	* As an example, the boot device on my workstation has a full path:
	229	*
	230	* /pci@1e,600000/ide@d/disk@0,0:c
	231	*/
	232	static void __init sun4v_path_component(struct device_node dp, char tmp_buf)
	233	{
	234	struct linux_prom64_registers *regs;
	235	struct property *rprop;
	236	u32 high_bits, low_bits, type;
	237
	238	rprop = of_find_property(dp, "reg", NULL);
	239	if (!rprop)
	240	return;
	241
	242	regs = rprop->value;
	243	if (!is_root_node(dp->parent)) {
	244	sprintf(tmp_buf, "%s@%x,%x",
	245	dp->name,
	246	(unsigned int) (regs->phys_addr >> 32UL),
	247	(unsigned int) (regs->phys_addr & 0xffffffffUL));
	248	return;
	249	}
	250
	251	type = regs->phys_addr >> 60UL;
252	high_bits = (regs->phys_addr >> 32UL) & 0x0fffffffUL;
253	low_bits = (regs->phys_addr & 0xffffffffUL);
254
255	if (type == 0 \|\| type == 8) {
256	const char *prefix = (type == 0) ? "m" : "i";
257
258	if (low_bits)
259	sprintf(tmp_buf, "%s@%s%x,%x",
260	dp->name, prefix,
261	high_bits, low_bits);
262	else
263	sprintf(tmp_buf, "%s@%s%x",
264	dp->name,
265	prefix,
266	high_bits);
267	} else if (type == 12) {
268	sprintf(tmp_buf, "%s@%x",
269	dp->name, high_bits);
270	}
271	}
272
273	static void __init sun4u_path_component(struct device_node dp, char tmp_buf)
274	{
275	struct linux_prom64_registers *regs;
276	struct property *prop;
277
278	prop = of_find_property(dp, "reg", NULL);
279	if (!prop)
280	return;
281
282	regs = prop->value;
283	if (!is_root_node(dp->parent)) {
284	sprintf(tmp_buf, "%s@%x,%x",
285	dp->name,
286	(unsigned int) (regs->phys_addr >> 32UL),
287	(unsigned int) (regs->phys_addr & 0xffffffffUL));
288	return;
289	}
290
291	prop = of_find_property(dp, "upa-portid", NULL);
292	if (!prop)
293	prop = of_find_property(dp, "portid", NULL);
294	if (prop) {
295	unsigned long mask = 0xffffffffUL;
296
297	if (tlb_type >= cheetah)
298	mask = 0x7fffff;
299
300	sprintf(tmp_buf, "%s@%x,%x",
301	dp->name,
302	(u32 )prop->value,
303	(unsigned int) (regs->phys_addr & mask));
304	}
305	}
306
307	/* "name@slot,offset" */
308	static void __init sbus_path_component(struct device_node dp, char tmp_buf)
309	{
310	struct linux_prom_registers *regs;
311	struct property *prop;
312
313	prop = of_find_property(dp, "reg", NULL);
314	if (!prop)
315	return;
316
317	regs = prop->value;
318	sprintf(tmp_buf, "%s@%x,%x",
319	dp->name,
320	regs->which_io,
321	regs->phys_addr);
322	}
323
324	/* "name@devnum[,func]" */
325	static void __init pci_path_component(struct device_node dp, char tmp_buf)
326	{
327	struct linux_prom_pci_registers *regs;
328	struct property *prop;
329	unsigned int devfn;
330
331	prop = of_find_property(dp, "reg", NULL);
332	if (!prop)
333	return;
334
335	regs = prop->value;
336	devfn = (regs->phys_hi >> 8) & 0xff;
337	if (devfn & 0x07) {
338	sprintf(tmp_buf, "%s@%x,%x",
339	dp->name,
340	devfn >> 3,
341	devfn & 0x07);
342	} else {
343	sprintf(tmp_buf, "%s@%x",
344	dp->name,
345	devfn >> 3);
346	}
347	}
348
349	/* "name@UPA_PORTID,offset" */
350	static void __init upa_path_component(struct device_node dp, char tmp_buf)
351	{
352	struct linux_prom64_registers *regs;
353	struct property *prop;
354
355	prop = of_find_property(dp, "reg", NULL);
356	if (!prop)
357	return;
358
359	regs = prop->value;
360
361	prop = of_find_property(dp, "upa-portid", NULL);
362	if (!prop)
363	return;
364
365	sprintf(tmp_buf, "%s@%x,%x",
366	dp->name,
367	(u32 ) prop->value,
368	(unsigned int) (regs->phys_addr & 0xffffffffUL));
369	}
370
371	/* "name@reg" */
372	static void __init vdev_path_component(struct device_node dp, char tmp_buf)
373	{
374	struct property *prop;
375	u32 *regs;
376
377	prop = of_find_property(dp, "reg", NULL);
378	if (!prop)
379	return;
380
381	regs = prop->value;
382
383	sprintf(tmp_buf, "%s@%x", dp->name, *regs);
384	}
385
386	/* "name@addrhi,addrlo" */
387	static void __init ebus_path_component(struct device_node dp, char tmp_buf)
388	{
389	struct linux_prom64_registers *regs;
390	struct property *prop;
391
392	prop = of_find_property(dp, "reg", NULL);
393	if (!prop)
394	return;
395
396	regs = prop->value;
397
398	sprintf(tmp_buf, "%s@%x,%x",
399	dp->name,
400	(unsigned int) (regs->phys_addr >> 32UL),
401	(unsigned int) (regs->phys_addr & 0xffffffffUL));
402	}
403
404	/* "name@bus,addr" */
405	static void __init i2c_path_component(struct device_node dp, char tmp_buf)
406	{
407	struct property *prop;
408	u32 *regs;
409
410	prop = of_find_property(dp, "reg", NULL);
411	if (!prop)
412	return;
413
414	regs = prop->value;
415
416	/* This actually isn't right... should look at the #address-cells
417	* property of the i2c bus node etc. etc.
418	*/
419	sprintf(tmp_buf, "%s@%x,%x",
420	dp->name, regs[0], regs[1]);
421	}
422
423	/* "name@reg0[,reg1]" */
424	static void __init usb_path_component(struct device_node dp, char tmp_buf)
425	{
426	struct property *prop;
427	u32 *regs;
428
429	prop = of_find_property(dp, "reg", NULL);
430	if (!prop)
431	return;
432
433	regs = prop->value;
434
435	if (prop->length == sizeof(u32) \|\| regs[1] == 1) {
436	sprintf(tmp_buf, "%s@%x",
437	dp->name, regs[0]);
438	} else {
439	sprintf(tmp_buf, "%s@%x,%x",
440	dp->name, regs[0], regs[1]);
441	}
442	}
443
444	/* "name@reg0reg1[,reg2reg3]" */
445	static void __init ieee1394_path_component(struct device_node dp, char tmp_buf)
446	{
447	struct property *prop;
448	u32 *regs;
449
450	prop = of_find_property(dp, "reg", NULL);
451	if (!prop)
452	return;
453
454	regs = prop->value;
455
456	if (regs[2] \|\| regs[3]) {
457	sprintf(tmp_buf, "%s@%08x%08x,%04x%08x",
458	dp->name, regs[0], regs[1], regs[2], regs[3]);
459	} else {
460	sprintf(tmp_buf, "%s@%08x%08x",
461	dp->name, regs[0], regs[1]);
462	}
463	}
464
465	static void __init __build_path_component(struct device_node dp, char tmp_buf)
466	{
467	struct device_node *parent = dp->parent;
468
469	if (parent != NULL) {
470	if (!strcmp(parent->type, "pci") \|\|
471	!strcmp(parent->type, "pciex"))
472	return pci_path_component(dp, tmp_buf);
473	if (!strcmp(parent->type, "sbus"))
474	return sbus_path_component(dp, tmp_buf);
475	if (!strcmp(parent->type, "upa"))
476	return upa_path_component(dp, tmp_buf);
477	if (!strcmp(parent->type, "ebus"))
478	return ebus_path_component(dp, tmp_buf);
479	if (!strcmp(parent->name, "usb") \|\|
480	!strcmp(parent->name, "hub"))
481	return usb_path_component(dp, tmp_buf);
482	if (!strcmp(parent->type, "i2c"))
483	return i2c_path_component(dp, tmp_buf);
484	if (!strcmp(parent->type, "firewire"))
485	return ieee1394_path_component(dp, tmp_buf);
486	if (!strcmp(parent->type, "virtual-devices"))
487	return vdev_path_component(dp, tmp_buf);
488
489	/* "isa" is handled with platform naming */
490	}
491
492	/* Use platform naming convention. */
493	if (tlb_type == hypervisor)
494	return sun4v_path_component(dp, tmp_buf);
495	else
496	return sun4u_path_component(dp, tmp_buf);
497	}
498
499	static char * __init build_path_component(struct device_node *dp)
500	{
501	char tmp_buf[64], *n;
502
503	tmp_buf[0] = '\0';
504	__build_path_component(dp, tmp_buf);
505	if (tmp_buf[0] == '\0')
506	strcpy(tmp_buf, dp->name);
507
508	n = prom_early_alloc(strlen(tmp_buf) + 1);
509	strcpy(n, tmp_buf);
510
511	return n;
512	}
513
514	static char * __init build_full_name(struct device_node *dp)
515	{
516	int len, ourlen, plen;
517	char *n;
518
519	plen = strlen(dp->parent->full_name);
520	ourlen = strlen(dp->path_component_name);
521	len = ourlen + plen + 2;
522
523	n = prom_early_alloc(len);
524	strcpy(n, dp->parent->full_name);
525	if (!is_root_node(dp->parent)) {
526	strcpy(n + plen, "/");
527	plen++;
528	}
529	strcpy(n + plen, dp->path_component_name);
530
531	return n;
532	}
533
534	static struct property * __init build_one_prop(phandle node, char *prev)
535	{
536	static struct property *tmp = NULL;
537	struct property *p;
538
539	if (tmp) {
540	p = tmp;
541	memset(p, 0, sizeof(*p) + 32);
542	tmp = NULL;
543	} else
544	p = prom_early_alloc(sizeof(struct property) + 32);
545
546	p->name = (char *) (p + 1);
547	if (prev == NULL) {
548	prom_firstprop(node, p->name);
549	} else {
550	prom_nextprop(node, prev, p->name);
551	}
552	if (strlen(p->name) == 0) {
553	tmp = p;
554	return NULL;
555	}
556	p->length = prom_getproplen(node, p->name);
557	if (p->length <= 0) {
558	p->length = 0;
559	} else {
560	p->value = prom_early_alloc(p->length);
561	prom_getproperty(node, p->name, p->value, p->length);
562	}
563	return p;
564	}
565
566	static struct property * __init build_prop_list(phandle node)
567	{
568	struct property head, tail;
569
570	head = tail = build_one_prop(node, NULL);
571	while(tail) {
572	tail->next = build_one_prop(node, tail->name);
573	tail = tail->next;
574	}
575
576	return head;
577	}
578
579	static char * __init get_one_property(phandle node, const char *name)
580	{
581	char *buf = "<NULL>";
582	int len;
583
584	len = prom_getproplen(node, name);
585	if (len > 0) {
586	buf = prom_early_alloc(len);
587	prom_getproperty(node, name, buf, len);
588	}
589
590	return buf;
591	}
592
593	static struct device_node * __init create_node(phandle node)
594	{
595	struct device_node *dp;
596
597	if (!node)
598	return NULL;
599
600	dp = prom_early_alloc(sizeof(*dp));
601
602	kref_init(&dp->kref);
603
604	dp->name = get_one_property(node, "name");
605	dp->type = get_one_property(node, "device_type");
606	dp->node = node;
607
608	/* Build interrupts later... */
609
610	dp->properties = build_prop_list(node);
611
612	return dp;
613	}
614
615	static struct device_node * __init build_tree(struct device_node parent, phandle node, struct device_node **nextp)
616	{
617	struct device_node *dp;
618
619	dp = create_node(node);
620	if (dp) {
621	(nextp) = dp;
622	*nextp = &dp->allnext;
623
624	dp->parent = parent;
625	dp->path_component_name = build_path_component(dp);
626	dp->full_name = build_full_name(dp);
627
628	dp->child = build_tree(dp, prom_getchild(node), nextp);
629
630	dp->sibling = build_tree(parent, prom_getsibling(node), nextp);
631	}
632
633	return dp;
634	}
635
636	void __init prom_build_devicetree(void)
637	{
638	struct device_node **nextp;
639
640	allnodes = create_node(prom_root_node);
641	allnodes->path_component_name = "";
642	allnodes->full_name = "/";
643
644	nextp = &allnodes->allnext;
645	allnodes->child = build_tree(allnodes,
646	prom_getchild(allnodes->node),
647	&nextp);
648	printk("PROM: Built device tree with %u bytes of memory.\n",
649	prom_early_allocated);
650	}