[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;

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 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 = prom_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 = prom_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;
942a6bdd DM	31
efeac2f8	32	void * __init prom_early_alloc(unsigned long size)
942a6bdd DM	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	199	static struct property * __init build_one_prop(phandle node, char prev, char special_name, void *special_val, int special_len)
942a6bdd DM	200	{
	201	static struct property *tmp = NULL;
	202	struct property *p;
	203	int len;
f7785a64	204	const char *name;
942a6bdd DM	205
	206	if (tmp) {
	207	p = tmp;
	208	memset(p, 0, sizeof(*p) + 32);
	209	tmp = NULL;
87b385da	210	} else {
942a6bdd	211	p = prom_early_alloc(sizeof(struct property) + 32);
e5ff0fe3	212	p->unique_id = prom_unique_id++;
87b385da	213	}
942a6bdd DM	214
942a6bdd DM	215	p->name = (char *) (p + 1);
87b385da	216	if (special_name) {
f7785a64	217	strcpy(p->name, special_name);
87b385da DM	218	p->length = special_len;
	219	p->value = prom_early_alloc(special_len);
	220	memcpy(p->value, special_val, special_len);
942a6bdd	221	} else {
87b385da	222	if (prev == NULL) {
f7785a64	223	name = prom_firstprop(node, NULL);
87b385da	224	} else {
f7785a64	225	name = prom_nextprop(node, prev, NULL);
87b385da	226	}
f7785a64	227	if (strlen(name) == 0) {
87b385da DM	228	tmp = p;
	229	return NULL;
	230	}
f7785a64	231	strcpy(p->name, name);
87b385da DM	232	p->length = prom_getproplen(node, p->name);
	233	if (p->length <= 0) {
	234	p->length = 0;
	235	} else {
	236	p->value = prom_early_alloc(p->length + 1);
078830ea MH	237	len = prom_getproperty(node, p->name, p->value,
	238	p->length);
	239	if (len <= 0)
	240	p->length = 0;
87b385da DM	241	((unsigned char *)p->value)[p->length] = '\0';
87b385da DM	242	}
942a6bdd DM	243	}
	244	return p;
	245	}
	246
	247	static struct property * __init build_prop_list(phandle node)
	248	{
	249	struct property head, tail;
	250
87b385da DM	251	head = tail = build_one_prop(node, NULL,
	252	".node", &node, sizeof(node));
	253
	254	tail->next = build_one_prop(node, NULL, NULL, NULL, 0);
	255	tail = tail->next;
942a6bdd	256	while(tail) {
87b385da DM	257	tail->next = build_one_prop(node, tail->name,
87b385da DM	258	NULL, NULL, 0);
942a6bdd DM	259	tail = tail->next;
	260	}
	261
	262	return head;
	263	}
	264
	265	static char * __init get_one_property(phandle node, char *name)
	266	{
	267	char *buf = "<NULL>";
	268	int len;
	269
	270	len = prom_getproplen(node, name);
	271	if (len > 0) {
	272	buf = prom_early_alloc(len);
	273	len = prom_getproperty(node, name, buf, len);
	274	}
	275
	276	return buf;
	277	}
	278
	279	static struct device_node * __init create_node(phandle node)
	280	{
	281	struct device_node *dp;
	282
	283	if (!node)
	284	return NULL;
	285
	286	dp = prom_early_alloc(sizeof(*dp));
e5ff0fe3	287	dp->unique_id = prom_unique_id++;
942a6bdd DM	288
	289	kref_init(&dp->kref);
	290
	291	dp->name = get_one_property(node, "name");
	292	dp->type = get_one_property(node, "device_type");
	293	dp->node = node;
	294
	295	/* Build interrupts later... */
	296
	297	dp->properties = build_prop_list(node);
	298
	299	return dp;
	300	}
	301
	302	static struct device_node * __init build_tree(struct device_node parent, phandle node, struct device_node **nextp)
	303	{
	304	struct device_node *dp;
	305
	306	dp = create_node(node);
	307	if (dp) {
	308	(nextp) = dp;
	309	*nextp = &dp->allnext;
	310
	311	dp->parent = parent;
	312	dp->path_component_name = build_path_component(dp);
	313	dp->full_name = build_full_name(dp);
	314
	315	dp->child = build_tree(dp, prom_getchild(node), nextp);
	316
	317	dp->sibling = build_tree(parent, prom_getsibling(node), nextp);
	318	}
	319
	320	return dp;
	321	}
	322
c73fcc84 DM	323	struct device_node *of_console_device;
	324	EXPORT_SYMBOL(of_console_device);
	325
	326	char *of_console_path;
	327	EXPORT_SYMBOL(of_console_path);
	328
	329	char *of_console_options;
	330	EXPORT_SYMBOL(of_console_options);
	331
	332	extern void restore_current(void);
	333
	334	static void __init of_console_init(void)
	335	{
	336	char *msg = "OF stdout device is: %s\n";
	337	struct device_node *dp;
	338	unsigned long flags;
	339	const char *type;
	340	phandle node;
f623f388	341	int skip, tmp, fd;
c73fcc84 DM	342
	343	of_console_path = prom_early_alloc(256);
	344
	345	switch (prom_vers) {
	346	case PROM_V0:
c73fcc84 DM	347	skip = 0;
	348	switch (*romvec->pv_stdout) {
	349	case PROMDEV_SCREEN:
	350	type = "display";
	351	break;
	352
	353	case PROMDEV_TTYB:
	354	skip = 1;
	355	/* FALLTHRU */
	356
	357	case PROMDEV_TTYA:
	358	type = "serial";
	359	break;
	360
	361	default:
	362	prom_printf("Invalid PROM_V0 stdout value %u\n",
	363	*romvec->pv_stdout);
	364	prom_halt();
	365	}
	366
f623f388	367	tmp = skip;
c73fcc84	368	for_each_node_by_type(dp, type) {
f623f388	369	if (!tmp--)
c73fcc84 DM	370	break;
	371	}
	372	if (!dp) {
	373	prom_printf("Cannot find PROM_V0 console node.\n");
	374	prom_halt();
	375	}
	376	of_console_device = dp;
	377
	378	strcpy(of_console_path, dp->full_name);
	379	if (!strcmp(type, "serial")) {
	380	strcat(of_console_path,
	381	(skip ? ":b" : ":a"));
	382	}
	383	break;
	384
	385	default:
	386	case PROM_V2:
	387	case PROM_V3:
	388	fd = *romvec->pv_v2bootargs.fd_stdout;
	389
	390	spin_lock_irqsave(&prom_lock, flags);
	391	node = (*romvec->pv_v2devops.v2_inst2pkg)(fd);
	392	restore_current();
	393	spin_unlock_irqrestore(&prom_lock, flags);
	394
	395	if (!node) {
	396	prom_printf("Cannot resolve stdout node from "
	397	"instance %08x.\n", fd);
	398	prom_halt();
	399	}
	400	dp = of_find_node_by_phandle(node);
	401	type = of_get_property(dp, "device_type", NULL);
	402
	403	if (!type) {
	404	prom_printf("Console stdout lacks "
	405	"device_type property.\n");
	406	prom_halt();
	407	}
	408
	409	if (strcmp(type, "display") && strcmp(type, "serial")) {
	410	prom_printf("Console device_type is neither display "
	411	"nor serial.\n");
	412	prom_halt();
	413	}
	414
	415	of_console_device = dp;
	416
	417	if (prom_vers == PROM_V2) {
	418	strcpy(of_console_path, dp->full_name);
	419	switch (*romvec->pv_stdout) {
	420	case PROMDEV_TTYA:
	421	strcat(of_console_path, ":a");
	422	break;
	423	case PROMDEV_TTYB:
	424	strcat(of_console_path, ":b");
	425	break;
	426	}
	427	} else {
	428	const char *path;
	429
	430	dp = of_find_node_by_path("/");
	431	path = of_get_property(dp, "stdout-path", NULL);
	432	if (!path) {
	433	prom_printf("No stdout-path in root node.\n");
434	prom_halt();
435	}
436	strcpy(of_console_path, path);
437	}
438	break;
439	}
440
441	of_console_options = strrchr(of_console_path, ':');
442	if (of_console_options) {
443	of_console_options++;
444	if (*of_console_options == '\0')
445	of_console_options = NULL;
446	}
447
448	prom_printf(msg, of_console_path);
449	printk(msg, of_console_path);
450	}
451
942a6bdd DM	452	void __init prom_build_devicetree(void)
	453	{
	454	struct device_node **nextp;
	455
	456	allnodes = create_node(prom_root_node);
	457	allnodes->path_component_name = "";
	458	allnodes->full_name = "/";
	459
	460	nextp = &allnodes->allnext;
	461	allnodes->child = build_tree(allnodes,
	462	prom_getchild(allnodes->node),
	463	&nextp);
c73fcc84 DM	464	of_console_init();
c73fcc84 DM	465
942a6bdd DM	466	printk("PROM: Built device tree with %u bytes of memory.\n",
	467	prom_early_allocated);
	468	}