[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;
}

/* 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);
}

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;
}

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 = prom_create_node(prom_root_node, NULL);
	allnodes->path_component_name = "";
	allnodes->full_name = "/";

	nextp = &allnodes->allnext;
	allnodes->child = prom_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
942a6bdd DM	45	/* The following routines deal with the black magic of fully naming a
	46	* node.
	47	*
	48	* Certain well known named nodes are just the simple name string.
	49	*
	50	* Actual devices have an address specifier appended to the base name
	51	* string, like this "foo@addr". The "addr" can be in any number of
	52	* formats, and the platform plus the type of the node determine the
	53	* format and how it is constructed.
	54	*
	55	* For children of the ROOT node, the naming convention is fixed and
	56	* determined by whether this is a sun4u or sun4v system.
	57	*
	58	* For children of other nodes, it is bus type specific. So
	59	* we walk up the tree until we discover a "device_type" property
	60	* we recognize and we go from there.
	61	*/
	62	static void __init sparc32_path_component(struct device_node dp, char tmp_buf)
	63	{
	64	struct linux_prom_registers *regs;
	65	struct property *rprop;
	66
	67	rprop = of_find_property(dp, "reg", NULL);
	68	if (!rprop)
	69	return;
	70
	71	regs = rprop->value;
	72	sprintf(tmp_buf, "%s@%x,%x",
	73	dp->name,
	74	regs->which_io, regs->phys_addr);
	75	}
	76
	77	/* "name@slot,offset" */
	78	static void __init sbus_path_component(struct device_node dp, char tmp_buf)
	79	{
	80	struct linux_prom_registers *regs;
	81	struct property *prop;
	82
	83	prop = of_find_property(dp, "reg", NULL);
	84	if (!prop)
	85	return;
	86
	87	regs = prop->value;
	88	sprintf(tmp_buf, "%s@%x,%x",
	89	dp->name,
	90	regs->which_io,
	91	regs->phys_addr);
	92	}
	93
	94	/* "name@devnum[,func]" */
	95	static void __init pci_path_component(struct device_node dp, char tmp_buf)
	96	{
	97	struct linux_prom_pci_registers *regs;
	98	struct property *prop;
	99	unsigned int devfn;
	100
	101	prop = of_find_property(dp, "reg", NULL);
	102	if (!prop)
	103	return;
	104
	105	regs = prop->value;
	106	devfn = (regs->phys_hi >> 8) & 0xff;
	107	if (devfn & 0x07) {
	108	sprintf(tmp_buf, "%s@%x,%x",
109	dp->name,
110	devfn >> 3,
111	devfn & 0x07);
112	} else {
113	sprintf(tmp_buf, "%s@%x",
114	dp->name,
115	devfn >> 3);
116	}
117	}
118
119	/* "name@addrhi,addrlo" */
120	static void __init ebus_path_component(struct device_node dp, char tmp_buf)
121	{
122	struct linux_prom_registers *regs;
123	struct property *prop;
124
125	prop = of_find_property(dp, "reg", NULL);
126	if (!prop)
127	return;
128
129	regs = prop->value;
130
131	sprintf(tmp_buf, "%s@%x,%x",
132	dp->name,
133	regs->which_io, regs->phys_addr);
134	}
135
136	static void __init __build_path_component(struct device_node dp, char tmp_buf)
137	{
138	struct device_node *parent = dp->parent;
139
140	if (parent != NULL) {
141	if (!strcmp(parent->type, "pci") \|\|
142	!strcmp(parent->type, "pciex"))
143	return pci_path_component(dp, tmp_buf);
144	if (!strcmp(parent->type, "sbus"))
145	return sbus_path_component(dp, tmp_buf);
146	if (!strcmp(parent->type, "ebus"))
147	return ebus_path_component(dp, tmp_buf);
148
149	/* "isa" is handled with platform naming */
150	}
151
152	/* Use platform naming convention. */
153	return sparc32_path_component(dp, tmp_buf);
154	}
155
6524036a	156	char * __init build_path_component(struct device_node *dp)
942a6bdd DM	157	{
	158	char tmp_buf[64], *n;
	159
	160	tmp_buf[0] = '\0';
	161	__build_path_component(dp, tmp_buf);
	162	if (tmp_buf[0] == '\0')
	163	strcpy(tmp_buf, dp->name);
	164
	165	n = prom_early_alloc(strlen(tmp_buf) + 1);
	166	strcpy(n, tmp_buf);
	167
	168	return n;
	169	}
	170
c73fcc84 DM	171	struct device_node *of_console_device;
	172	EXPORT_SYMBOL(of_console_device);
	173
	174	char *of_console_path;
	175	EXPORT_SYMBOL(of_console_path);
	176
	177	char *of_console_options;
	178	EXPORT_SYMBOL(of_console_options);
	179
	180	extern void restore_current(void);
	181
	182	static void __init of_console_init(void)
	183	{
	184	char *msg = "OF stdout device is: %s\n";
	185	struct device_node *dp;
	186	unsigned long flags;
	187	const char *type;
	188	phandle node;
f623f388	189	int skip, tmp, fd;
c73fcc84 DM	190
	191	of_console_path = prom_early_alloc(256);
	192
	193	switch (prom_vers) {
	194	case PROM_V0:
c73fcc84 DM	195	skip = 0;
	196	switch (*romvec->pv_stdout) {
	197	case PROMDEV_SCREEN:
	198	type = "display";
	199	break;
	200
	201	case PROMDEV_TTYB:
	202	skip = 1;
	203	/* FALLTHRU */
	204
	205	case PROMDEV_TTYA:
	206	type = "serial";
	207	break;
	208
	209	default:
	210	prom_printf("Invalid PROM_V0 stdout value %u\n",
	211	*romvec->pv_stdout);
	212	prom_halt();
	213	}
	214
f623f388	215	tmp = skip;
c73fcc84	216	for_each_node_by_type(dp, type) {
f623f388	217	if (!tmp--)
c73fcc84 DM	218	break;
	219	}
	220	if (!dp) {
	221	prom_printf("Cannot find PROM_V0 console node.\n");
	222	prom_halt();
	223	}
	224	of_console_device = dp;
	225
	226	strcpy(of_console_path, dp->full_name);
	227	if (!strcmp(type, "serial")) {
	228	strcat(of_console_path,
	229	(skip ? ":b" : ":a"));
	230	}
	231	break;
	232
	233	default:
	234	case PROM_V2:
	235	case PROM_V3:
	236	fd = *romvec->pv_v2bootargs.fd_stdout;
	237
	238	spin_lock_irqsave(&prom_lock, flags);
	239	node = (*romvec->pv_v2devops.v2_inst2pkg)(fd);
	240	restore_current();
	241	spin_unlock_irqrestore(&prom_lock, flags);
	242
	243	if (!node) {
	244	prom_printf("Cannot resolve stdout node from "
	245	"instance %08x.\n", fd);
	246	prom_halt();
	247	}
	248	dp = of_find_node_by_phandle(node);
	249	type = of_get_property(dp, "device_type", NULL);
	250
	251	if (!type) {
	252	prom_printf("Console stdout lacks "
	253	"device_type property.\n");
	254	prom_halt();
	255	}
	256
	257	if (strcmp(type, "display") && strcmp(type, "serial")) {
	258	prom_printf("Console device_type is neither display "
	259	"nor serial.\n");
	260	prom_halt();
	261	}
	262
	263	of_console_device = dp;
	264
	265	if (prom_vers == PROM_V2) {
	266	strcpy(of_console_path, dp->full_name);
	267	switch (*romvec->pv_stdout) {
	268	case PROMDEV_TTYA:
	269	strcat(of_console_path, ":a");
	270	break;
	271	case PROMDEV_TTYB:
	272	strcat(of_console_path, ":b");
	273	break;
	274	}
	275	} else {
	276	const char *path;
	277
	278	dp = of_find_node_by_path("/");
	279	path = of_get_property(dp, "stdout-path", NULL);
	280	if (!path) {
	281	prom_printf("No stdout-path in root node.\n");
282	prom_halt();
283	}
284	strcpy(of_console_path, path);
285	}
286	break;
287	}
288
289	of_console_options = strrchr(of_console_path, ':');
290	if (of_console_options) {
291	of_console_options++;
292	if (*of_console_options == '\0')
293	of_console_options = NULL;
294	}
295
296	prom_printf(msg, of_console_path);
297	printk(msg, of_console_path);
298	}
299
942a6bdd DM	300	void __init prom_build_devicetree(void)
	301	{
	302	struct device_node **nextp;
	303
6524036a	304	allnodes = prom_create_node(prom_root_node, NULL);
942a6bdd DM	305	allnodes->path_component_name = "";
	306	allnodes->full_name = "/";
	307
	308	nextp = &allnodes->allnext;
6524036a DM	309	allnodes->child = prom_build_tree(allnodes,
	310	prom_getchild(allnodes->node),
	311	&nextp);
c73fcc84 DM	312	of_console_init();
c73fcc84 DM	313
942a6bdd DM	314	printk("PROM: Built device tree with %u bytes of memory.\n",
	315	prom_early_allocated);
	316	}