[deliverable/linux.git] / arch / sparc / kernel / prom_32.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 sparc32 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>

#include "prom.h"

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.
 */
static void __init sparc32_path_component(struct device_node *dp, char *tmp_buf)
{
	struct linux_prom_registers *regs;
	struct property *rprop;

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

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

/* "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@addrhi,addrlo" */
static void __init ebus_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);
}

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, "ebus"))
			return ebus_path_component(dp, tmp_buf);

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

	/* Use platform naming convention.  */
	return sparc32_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 unsigned int unique_id;

static struct property * __init build_one_prop(phandle node, char *prev, char *special_name, void *special_val, int special_len)
{
	static struct property *tmp = NULL;
	struct property *p;
	int len;
	const char *name;

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

	p->name = (char *) (p + 1);
	if (special_name) {
		strcpy(p->name, special_name);
		p->length = special_len;
		p->value = prom_early_alloc(special_len);
		memcpy(p->value, special_val, special_len);
	} else {
		if (prev == NULL) {
			name = prom_firstprop(node, NULL);
		} else {
			name = prom_nextprop(node, prev, NULL);
		}
		if (strlen(name) == 0) {
			tmp = p;
			return NULL;
		}
		strcpy(p->name, name);
		p->length = prom_getproplen(node, p->name);
		if (p->length <= 0) {
			p->length = 0;
		} else {
			p->value = prom_early_alloc(p->length + 1);
			len = prom_getproperty(node, p->name, p->value,
					       p->length);
			if (len <= 0)
				p->length = 0;
			((unsigned char *)p->value)[p->length] = '\0';
		}
	}
	return p;
}

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

	head = tail = build_one_prop(node, NULL,
				     ".node", &node, sizeof(node));

	tail->next = build_one_prop(node, NULL, NULL, NULL, 0);
	tail = tail->next;
	while(tail) {
		tail->next = build_one_prop(node, tail->name,
					    NULL, NULL, 0);
		tail = tail->next;
	}

	return head;
}

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

	len = prom_getproplen(node, name);
	if (len > 0) {
		buf = prom_early_alloc(len);
		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));
	dp->unique_id = unique_id++;

	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;
}

struct device_node *of_console_device;
EXPORT_SYMBOL(of_console_device);

char *of_console_path;
EXPORT_SYMBOL(of_console_path);

char *of_console_options;
EXPORT_SYMBOL(of_console_options);

extern void restore_current(void);

static void __init of_console_init(void)
{
	char *msg = "OF stdout device is: %s\n";
	struct device_node *dp;
	unsigned long flags;
	const char *type;
	phandle node;
	int skip, tmp, fd;

	of_console_path = prom_early_alloc(256);

	switch (prom_vers) {
	case PROM_V0:
		skip = 0;
		switch (*romvec->pv_stdout) {
		case PROMDEV_SCREEN:
			type = "display";
			break;

		case PROMDEV_TTYB:
			skip = 1;
			/* FALLTHRU */

		case PROMDEV_TTYA:
			type = "serial";
			break;

		default:
			prom_printf("Invalid PROM_V0 stdout value %u\n",
				    *romvec->pv_stdout);
			prom_halt();
		}

		tmp = skip;
		for_each_node_by_type(dp, type) {
			if (!tmp--)
				break;
		}
		if (!dp) {
			prom_printf("Cannot find PROM_V0 console node.\n");
			prom_halt();
		}
		of_console_device = dp;

		strcpy(of_console_path, dp->full_name);
		if (!strcmp(type, "serial")) {
			strcat(of_console_path,
			       (skip ? ":b" : ":a"));
		}
		break;

	default:
	case PROM_V2:
	case PROM_V3:
		fd = *romvec->pv_v2bootargs.fd_stdout;

		spin_lock_irqsave(&prom_lock, flags);
		node = (*romvec->pv_v2devops.v2_inst2pkg)(fd);
		restore_current();
		spin_unlock_irqrestore(&prom_lock, flags);

		if (!node) {
			prom_printf("Cannot resolve stdout node from "
				    "instance %08x.\n", fd);
			prom_halt();
		}
		dp = of_find_node_by_phandle(node);
		type = of_get_property(dp, "device_type", NULL);

		if (!type) {
			prom_printf("Console stdout lacks "
				    "device_type property.\n");
			prom_halt();
		}

		if (strcmp(type, "display") && strcmp(type, "serial")) {
			prom_printf("Console device_type is neither display "
				    "nor serial.\n");
			prom_halt();
		}

		of_console_device = dp;

		if (prom_vers == PROM_V2) {
			strcpy(of_console_path, dp->full_name);
			switch (*romvec->pv_stdout) {
			case PROMDEV_TTYA:
				strcat(of_console_path, ":a");
				break;
			case PROMDEV_TTYB:
				strcat(of_console_path, ":b");
				break;
			}
		} else {
			const char *path;

			dp = of_find_node_by_path("/");
			path = of_get_property(dp, "stdout-path", NULL);
			if (!path) {
				prom_printf("No stdout-path in root node.\n");
				prom_halt();
			}
			strcpy(of_console_path, path);
		}
		break;
	}

	of_console_options = strrchr(of_console_path, ':');
	if (of_console_options) {
		of_console_options++;
		if (*of_console_options == '\0')
			of_console_options = NULL;
	}

	prom_printf(msg, of_console_path);
	printk(msg, of_console_path);
}

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);
	of_console_init();

	printk("PROM: Built device tree with %u bytes of memory.\n",
	       prom_early_allocated);
}
Commit	Line	Data
942a6bdd 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 sparc32 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>
	23	#include <linux/module.h>
	24
	25	#include <asm/prom.h>
	26	#include <asm/oplib.h>
	27
657f201d	28	#include "prom.h"
fb7cd9d9	29
942a6bdd DM	30	static unsigned int prom_early_allocated;
	31
	32	static void * __init prom_early_alloc(unsigned long size)
	33	{
	34	void *ret;
	35
	36	ret = __alloc_bootmem(size, SMP_CACHE_BYTES, 0UL);
	37	if (ret != NULL)
	38	memset(ret, 0, size);
	39
	40	prom_early_allocated += size;
	41
	42	return ret;
	43	}
	44
	45	static int is_root_node(const struct device_node *dp)
	46	{
	47	if (!dp)
	48	return 0;
	49
	50	return (dp->parent == NULL);
	51	}
	52
	53	/* The following routines deal with the black magic of fully naming a
	54	* node.
	55	*
	56	* Certain well known named nodes are just the simple name string.
	57	*
	58	* Actual devices have an address specifier appended to the base name
	59	* string, like this "foo@addr". The "addr" can be in any number of
	60	* formats, and the platform plus the type of the node determine the
	61	* format and how it is constructed.
	62	*
	63	* For children of the ROOT node, the naming convention is fixed and
	64	* determined by whether this is a sun4u or sun4v system.
	65	*
	66	* For children of other nodes, it is bus type specific. So
	67	* we walk up the tree until we discover a "device_type" property
	68	* we recognize and we go from there.
	69	*/
	70	static void __init sparc32_path_component(struct device_node dp, char tmp_buf)
	71	{
	72	struct linux_prom_registers *regs;
	73	struct property *rprop;
	74
	75	rprop = of_find_property(dp, "reg", NULL);
	76	if (!rprop)
	77	return;
	78
	79	regs = rprop->value;
	80	sprintf(tmp_buf, "%s@%x,%x",
	81	dp->name,
	82	regs->which_io, regs->phys_addr);
	83	}
	84
	85	/* "name@slot,offset" */
	86	static void __init sbus_path_component(struct device_node dp, char tmp_buf)
	87	{
	88	struct linux_prom_registers *regs;
	89	struct property *prop;
	90
	91	prop = of_find_property(dp, "reg", NULL);
	92	if (!prop)
	93	return;
94
95	regs = prop->value;
96	sprintf(tmp_buf, "%s@%x,%x",
97	dp->name,
98	regs->which_io,
99	regs->phys_addr);
100	}
101
102	/* "name@devnum[,func]" */
103	static void __init pci_path_component(struct device_node dp, char tmp_buf)
104	{
105	struct linux_prom_pci_registers *regs;
106	struct property *prop;
107	unsigned int devfn;
108
109	prop = of_find_property(dp, "reg", NULL);
110	if (!prop)
111	return;
112
113	regs = prop->value;
114	devfn = (regs->phys_hi >> 8) & 0xff;
115	if (devfn & 0x07) {
116	sprintf(tmp_buf, "%s@%x,%x",
117	dp->name,
118	devfn >> 3,
119	devfn & 0x07);
120	} else {
121	sprintf(tmp_buf, "%s@%x",
122	dp->name,
123	devfn >> 3);
124	}
125	}
126
127	/* "name@addrhi,addrlo" */
128	static void __init ebus_path_component(struct device_node dp, char tmp_buf)
129	{
130	struct linux_prom_registers *regs;
131	struct property *prop;
132
133	prop = of_find_property(dp, "reg", NULL);
134	if (!prop)
135	return;
136
137	regs = prop->value;
138
139	sprintf(tmp_buf, "%s@%x,%x",
140	dp->name,
141	regs->which_io, regs->phys_addr);
142	}
143
144	static void __init __build_path_component(struct device_node dp, char tmp_buf)
145	{
146	struct device_node *parent = dp->parent;
147
148	if (parent != NULL) {
149	if (!strcmp(parent->type, "pci") \|\|
150	!strcmp(parent->type, "pciex"))
151	return pci_path_component(dp, tmp_buf);
152	if (!strcmp(parent->type, "sbus"))
153	return sbus_path_component(dp, tmp_buf);
154	if (!strcmp(parent->type, "ebus"))
155	return ebus_path_component(dp, tmp_buf);
156
157	/* "isa" is handled with platform naming */
158	}
159
160	/* Use platform naming convention. */
161	return sparc32_path_component(dp, tmp_buf);
162	}
163
164	static char * __init build_path_component(struct device_node *dp)
165	{
166	char tmp_buf[64], *n;
167
168	tmp_buf[0] = '\0';
169	__build_path_component(dp, tmp_buf);
170	if (tmp_buf[0] == '\0')
171	strcpy(tmp_buf, dp->name);
172
173	n = prom_early_alloc(strlen(tmp_buf) + 1);
174	strcpy(n, tmp_buf);
175
176	return n;
177	}
178
179	static char * __init build_full_name(struct device_node *dp)
180	{
181	int len, ourlen, plen;
182	char *n;
183
184	plen = strlen(dp->parent->full_name);
185	ourlen = strlen(dp->path_component_name);
186	len = ourlen + plen + 2;
187
188	n = prom_early_alloc(len);
189	strcpy(n, dp->parent->full_name);
190	if (!is_root_node(dp->parent)) {
191	strcpy(n + plen, "/");
192	plen++;
193	}
194	strcpy(n + plen, dp->path_component_name);
195
196	return n;
197	}
198
87b385da DM	199	static unsigned int unique_id;
	200
	201	static struct property * __init build_one_prop(phandle node, char prev, char special_name, void *special_val, int special_len)
942a6bdd DM	202	{
	203	static struct property *tmp = NULL;
	204	struct property *p;
	205	int len;
f7785a64	206	const char *name;
942a6bdd DM	207
	208	if (tmp) {
	209	p = tmp;
	210	memset(p, 0, sizeof(*p) + 32);
	211	tmp = NULL;
87b385da	212	} else {
942a6bdd	213	p = prom_early_alloc(sizeof(struct property) + 32);
87b385da DM	214	p->unique_id = unique_id++;
87b385da DM	215	}
942a6bdd DM	216
942a6bdd DM	217	p->name = (char *) (p + 1);
87b385da	218	if (special_name) {
f7785a64	219	strcpy(p->name, special_name);
87b385da DM	220	p->length = special_len;
	221	p->value = prom_early_alloc(special_len);
	222	memcpy(p->value, special_val, special_len);
942a6bdd	223	} else {
87b385da	224	if (prev == NULL) {
f7785a64	225	name = prom_firstprop(node, NULL);
87b385da	226	} else {
f7785a64	227	name = prom_nextprop(node, prev, NULL);
87b385da	228	}
f7785a64	229	if (strlen(name) == 0) {
87b385da DM	230	tmp = p;
	231	return NULL;
	232	}
f7785a64	233	strcpy(p->name, name);
87b385da DM	234	p->length = prom_getproplen(node, p->name);
	235	if (p->length <= 0) {
	236	p->length = 0;
	237	} else {
	238	p->value = prom_early_alloc(p->length + 1);
078830ea MH	239	len = prom_getproperty(node, p->name, p->value,
	240	p->length);
	241	if (len <= 0)
	242	p->length = 0;
87b385da DM	243	((unsigned char *)p->value)[p->length] = '\0';
87b385da DM	244	}
942a6bdd DM	245	}
	246	return p;
	247	}
	248
	249	static struct property * __init build_prop_list(phandle node)
	250	{
	251	struct property head, tail;
	252
87b385da DM	253	head = tail = build_one_prop(node, NULL,
	254	".node", &node, sizeof(node));
	255
	256	tail->next = build_one_prop(node, NULL, NULL, NULL, 0);
	257	tail = tail->next;
942a6bdd	258	while(tail) {
87b385da DM	259	tail->next = build_one_prop(node, tail->name,
87b385da DM	260	NULL, NULL, 0);
942a6bdd DM	261	tail = tail->next;
	262	}
	263
	264	return head;
	265	}
	266
	267	static char * __init get_one_property(phandle node, char *name)
	268	{
	269	char *buf = "<NULL>";
	270	int len;
	271
	272	len = prom_getproplen(node, name);
	273	if (len > 0) {
	274	buf = prom_early_alloc(len);
	275	len = prom_getproperty(node, name, buf, len);
	276	}
	277
	278	return buf;
	279	}
	280
	281	static struct device_node * __init create_node(phandle node)
	282	{
	283	struct device_node *dp;
	284
	285	if (!node)
	286	return NULL;
	287
	288	dp = prom_early_alloc(sizeof(*dp));
87b385da	289	dp->unique_id = unique_id++;
942a6bdd DM	290
	291	kref_init(&dp->kref);
	292
	293	dp->name = get_one_property(node, "name");
	294	dp->type = get_one_property(node, "device_type");
	295	dp->node = node;
	296
	297	/* Build interrupts later... */
	298
	299	dp->properties = build_prop_list(node);
	300
	301	return dp;
	302	}
	303
	304	static struct device_node * __init build_tree(struct device_node parent, phandle node, struct device_node **nextp)
	305	{
	306	struct device_node *dp;
	307
	308	dp = create_node(node);
	309	if (dp) {
	310	(nextp) = dp;
	311	*nextp = &dp->allnext;
	312
	313	dp->parent = parent;
	314	dp->path_component_name = build_path_component(dp);
	315	dp->full_name = build_full_name(dp);
	316
	317	dp->child = build_tree(dp, prom_getchild(node), nextp);
	318
	319	dp->sibling = build_tree(parent, prom_getsibling(node), nextp);
	320	}
	321
	322	return dp;
	323	}
	324
c73fcc84 DM	325	struct device_node *of_console_device;
	326	EXPORT_SYMBOL(of_console_device);
	327
	328	char *of_console_path;
	329	EXPORT_SYMBOL(of_console_path);
	330
	331	char *of_console_options;
	332	EXPORT_SYMBOL(of_console_options);
	333
	334	extern void restore_current(void);
	335
	336	static void __init of_console_init(void)
	337	{
	338	char *msg = "OF stdout device is: %s\n";
	339	struct device_node *dp;
	340	unsigned long flags;
	341	const char *type;
	342	phandle node;
f623f388	343	int skip, tmp, fd;
c73fcc84 DM	344
	345	of_console_path = prom_early_alloc(256);
	346
	347	switch (prom_vers) {
	348	case PROM_V0:
c73fcc84 DM	349	skip = 0;
	350	switch (*romvec->pv_stdout) {
	351	case PROMDEV_SCREEN:
	352	type = "display";
	353	break;
	354
	355	case PROMDEV_TTYB:
	356	skip = 1;
	357	/* FALLTHRU */
	358
	359	case PROMDEV_TTYA:
	360	type = "serial";
	361	break;
	362
	363	default:
	364	prom_printf("Invalid PROM_V0 stdout value %u\n",
	365	*romvec->pv_stdout);
	366	prom_halt();
	367	}
	368
f623f388	369	tmp = skip;
c73fcc84	370	for_each_node_by_type(dp, type) {
f623f388	371	if (!tmp--)
c73fcc84 DM	372	break;
	373	}
	374	if (!dp) {
	375	prom_printf("Cannot find PROM_V0 console node.\n");
	376	prom_halt();
	377	}
	378	of_console_device = dp;
	379
	380	strcpy(of_console_path, dp->full_name);
	381	if (!strcmp(type, "serial")) {
	382	strcat(of_console_path,
	383	(skip ? ":b" : ":a"));
	384	}
	385	break;
	386
	387	default:
	388	case PROM_V2:
	389	case PROM_V3:
	390	fd = *romvec->pv_v2bootargs.fd_stdout;
	391
	392	spin_lock_irqsave(&prom_lock, flags);
	393	node = (*romvec->pv_v2devops.v2_inst2pkg)(fd);
	394	restore_current();
	395	spin_unlock_irqrestore(&prom_lock, flags);
	396
	397	if (!node) {
	398	prom_printf("Cannot resolve stdout node from "
	399	"instance %08x.\n", fd);
	400	prom_halt();
	401	}
	402	dp = of_find_node_by_phandle(node);
	403	type = of_get_property(dp, "device_type", NULL);
	404
	405	if (!type) {
	406	prom_printf("Console stdout lacks "
	407	"device_type property.\n");
	408	prom_halt();
	409	}
	410
	411	if (strcmp(type, "display") && strcmp(type, "serial")) {
	412	prom_printf("Console device_type is neither display "
	413	"nor serial.\n");
	414	prom_halt();
	415	}
	416
	417	of_console_device = dp;
	418
	419	if (prom_vers == PROM_V2) {
	420	strcpy(of_console_path, dp->full_name);
	421	switch (*romvec->pv_stdout) {
	422	case PROMDEV_TTYA:
	423	strcat(of_console_path, ":a");
	424	break;
	425	case PROMDEV_TTYB:
	426	strcat(of_console_path, ":b");
	427	break;
	428	}
	429	} else {
	430	const char *path;
	431
	432	dp = of_find_node_by_path("/");
	433	path = of_get_property(dp, "stdout-path", NULL);
	434	if (!path) {
	435	prom_printf("No stdout-path in root node.\n");
436	prom_halt();
437	}
438	strcpy(of_console_path, path);
439	}
440	break;
441	}
442
443	of_console_options = strrchr(of_console_path, ':');
444	if (of_console_options) {
445	of_console_options++;
446	if (*of_console_options == '\0')
447	of_console_options = NULL;
448	}
449
450	prom_printf(msg, of_console_path);
451	printk(msg, of_console_path);
452	}
453
942a6bdd DM	454	void __init prom_build_devicetree(void)
	455	{
	456	struct device_node **nextp;
	457
	458	allnodes = create_node(prom_root_node);
	459	allnodes->path_component_name = "";
	460	allnodes->full_name = "/";
	461
	462	nextp = &allnodes->allnext;
	463	allnodes->child = build_tree(allnodes,
	464	prom_getchild(allnodes->node),
	465	&nextp);
c73fcc84 DM	466	of_console_init();
c73fcc84 DM	467
942a6bdd DM	468	printk("PROM: Built device tree with %u bytes of memory.\n",
	469	prom_early_allocated);
	470	}