[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / powerpc / boot / devtree.c

/*
 * devtree.c - convenience functions for device tree manipulation
 * Copyright 2007 David Gibson, IBM Corporation.
 * Copyright (c) 2007 Freescale Semiconductor, Inc.
 *
 * Authors: David Gibson <david@gibson.dropbear.id.au>
 *	    Scott Wood <scottwood@freescale.com>
 *
 * 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 <stdarg.h>
#include <stddef.h>
#include "types.h"
#include "string.h"
#include "stdio.h"
#include "ops.h"

void dt_fixup_memory(u64 start, u64 size)
{
	void *root, *memory;
	int naddr, nsize, i;
	u32 memreg[4];

	root = finddevice("/");
	if (getprop(root, "#address-cells", &naddr, sizeof(naddr)) < 0)
		naddr = 2;
	if (naddr < 1 || naddr > 2)
		fatal("Can't cope with #address-cells == %d in /\n\r", naddr);

	if (getprop(root, "#size-cells", &nsize, sizeof(nsize)) < 0)
		nsize = 1;
	if (nsize < 1 || nsize > 2)
		fatal("Can't cope with #size-cells == %d in /\n\r", nsize);

	i = 0;
	if (naddr == 2)
		memreg[i++] = start >> 32;
	memreg[i++] = start & 0xffffffff;
	if (nsize == 2)
		memreg[i++] = size >> 32;
	memreg[i++] = size & 0xffffffff;

	memory = finddevice("/memory");
	if (! memory) {
		memory = create_node(NULL, "memory");
		setprop_str(memory, "device_type", "memory");
	}

	printf("Memory <- <0x%x", memreg[0]);
	for (i = 1; i < (naddr + nsize); i++)
		printf(" 0x%x", memreg[i]);
	printf("> (%ldMB)\n\r", (unsigned long)(size >> 20));

	setprop(memory, "reg", memreg, (naddr + nsize)*sizeof(u32));
}

#define MHZ(x)	((x + 500000) / 1000000)

void dt_fixup_cpu_clocks(u32 cpu, u32 tb, u32 bus)
{
	void *devp = NULL;

	printf("CPU clock-frequency <- 0x%x (%dMHz)\n\r", cpu, MHZ(cpu));
	printf("CPU timebase-frequency <- 0x%x (%dMHz)\n\r", tb, MHZ(tb));
	if (bus > 0)
		printf("CPU bus-frequency <- 0x%x (%dMHz)\n\r", bus, MHZ(bus));

	while ((devp = find_node_by_devtype(devp, "cpu"))) {
		setprop_val(devp, "clock-frequency", cpu);
		setprop_val(devp, "timebase-frequency", tb);
		if (bus > 0)
			setprop_val(devp, "bus-frequency", bus);
	}

	timebase_period_ns = 1000000000 / tb;
}

void dt_fixup_clock(const char *path, u32 freq)
{
	void *devp = finddevice(path);

	if (devp) {
		printf("%s: clock-frequency <- %x (%dMHz)\n\r", path, freq, MHZ(freq));
		setprop_val(devp, "clock-frequency", freq);
	}
}

void dt_fixup_mac_address_by_alias(const char *alias, const u8 *addr)
{
	void *devp = find_node_by_alias(alias);

	if (devp) {
		printf("%s: local-mac-address <-"
		       " %02x:%02x:%02x:%02x:%02x:%02x\n\r", alias,
		       addr[0], addr[1], addr[2],
		       addr[3], addr[4], addr[5]);

		setprop(devp, "local-mac-address", addr, 6);
	}
}

void dt_fixup_mac_address(u32 index, const u8 *addr)
{
	void *devp = find_node_by_prop_value(NULL, "linux,network-index",
	                                     (void*)&index, sizeof(index));

	if (devp) {
		printf("ENET%d: local-mac-address <-"
		       " %02x:%02x:%02x:%02x:%02x:%02x\n\r", index,
		       addr[0], addr[1], addr[2],
		       addr[3], addr[4], addr[5]);

		setprop(devp, "local-mac-address", addr, 6);
	}
}

void __dt_fixup_mac_addresses(u32 startindex, ...)
{
	va_list ap;
	u32 index = startindex;
	const u8 *addr;

	va_start(ap, startindex);

	while ((addr = va_arg(ap, const u8 *)))
		dt_fixup_mac_address(index++, addr);

	va_end(ap);
}

#define MAX_ADDR_CELLS 4

void dt_get_reg_format(void *node, u32 *naddr, u32 *nsize)
{
	if (getprop(node, "#address-cells", naddr, 4) != 4)
		*naddr = 2;
	if (getprop(node, "#size-cells", nsize, 4) != 4)
		*nsize = 1;
}

static void copy_val(u32 *dest, u32 *src, int naddr)
{
	int pad = MAX_ADDR_CELLS - naddr;

	memset(dest, 0, pad * 4);
	memcpy(dest + pad, src, naddr * 4);
}

static int sub_reg(u32 *reg, u32 *sub)
{
	int i, borrow = 0;

	for (i = MAX_ADDR_CELLS - 1; i >= 0; i--) {
		int prev_borrow = borrow;
		borrow = reg[i] < sub[i] + prev_borrow;
		reg[i] -= sub[i] + prev_borrow;
	}

	return !borrow;
}

static int add_reg(u32 *reg, u32 *add, int naddr)
{
	int i, carry = 0;

	for (i = MAX_ADDR_CELLS - 1; i >= MAX_ADDR_CELLS - naddr; i--) {
		u64 tmp = (u64)reg[i] + add[i] + carry;
		carry = tmp >> 32;
		reg[i] = (u32)tmp;
	}

	return !carry;
}

/* It is assumed that if the first byte of reg fits in a
 * range, then the whole reg block fits.
 */
static int compare_reg(u32 *reg, u32 *range, u32 *rangesize)
{
	int i;
	u32 end;

	for (i = 0; i < MAX_ADDR_CELLS; i++) {
		if (reg[i] < range[i])
			return 0;
		if (reg[i] > range[i])
			break;
	}

	for (i = 0; i < MAX_ADDR_CELLS; i++) {
		end = range[i] + rangesize[i];

		if (reg[i] < end)
			break;
		if (reg[i] > end)
			return 0;
	}

	return reg[i] != end;
}

/* reg must be MAX_ADDR_CELLS */
static int find_range(u32 *reg, u32 *ranges, int nregaddr,
                      int naddr, int nsize, int buflen)
{
	int nrange = nregaddr + naddr + nsize;
	int i;

	for (i = 0; i + nrange <= buflen; i += nrange) {
		u32 range_addr[MAX_ADDR_CELLS];
		u32 range_size[MAX_ADDR_CELLS];

		copy_val(range_addr, ranges + i, nregaddr);
		copy_val(range_size, ranges + i + nregaddr + naddr, nsize);

		if (compare_reg(reg, range_addr, range_size))
			return i;
	}

	return -1;
}

/* Currently only generic buses without special encodings are supported.
 * In particular, PCI is not supported.  Also, only the beginning of the
 * reg block is tracked; size is ignored except in ranges.
 */
static u32 prop_buf[MAX_PROP_LEN / 4];

static int dt_xlate(void *node, int res, int reglen, unsigned long *addr,
		unsigned long *size)
{
	u32 last_addr[MAX_ADDR_CELLS];
	u32 this_addr[MAX_ADDR_CELLS];
	void *parent;
	u64 ret_addr, ret_size;
	u32 naddr, nsize, prev_naddr, prev_nsize;
	int buflen, offset;

	parent = get_parent(node);
	if (!parent)
		return 0;

	dt_get_reg_format(parent, &naddr, &nsize);

	if (nsize > 2)
		return 0;

	offset = (naddr + nsize) * res;

	if (reglen < offset + naddr + nsize ||
	    MAX_PROP_LEN < (offset + naddr + nsize) * 4)
		return 0;

	copy_val(last_addr, prop_buf + offset, naddr);

	ret_size = prop_buf[offset + naddr];
	if (nsize == 2) {
		ret_size <<= 32;
		ret_size |= prop_buf[offset + naddr + 1];
	}

	for (;;) {
		prev_naddr = naddr;
		prev_nsize = nsize;
		node = parent;

		parent = get_parent(node);
		if (!parent)
			break;

		dt_get_reg_format(parent, &naddr, &nsize);

		buflen = getprop(node, "ranges", prop_buf,
				sizeof(prop_buf));
		if (buflen == 0)
			continue;
		if (buflen < 0 || buflen > sizeof(prop_buf))
			return 0;

		offset = find_range(last_addr, prop_buf, prev_naddr,
		                    naddr, prev_nsize, buflen / 4);

		if (offset < 0)
			return 0;

		copy_val(this_addr, prop_buf + offset, prev_naddr);

		if (!sub_reg(last_addr, this_addr))
			return 0;

		copy_val(this_addr, prop_buf + offset + prev_naddr, naddr);

		if (!add_reg(last_addr, this_addr, naddr))
			return 0;
	}

	if (naddr > 2)
		return 0;

	ret_addr = ((u64)last_addr[2] << 32) | last_addr[3];

	if (sizeof(void *) == 4 &&
	    (ret_addr >= 0x100000000ULL || ret_size > 0x100000000ULL ||
	     ret_addr + ret_size > 0x100000000ULL))
		return 0;

	*addr = ret_addr;
	if (size)
		*size = ret_size;

	return 1;
}

int dt_xlate_reg(void *node, int res, unsigned long *addr, unsigned long *size)
{
	int reglen;

	reglen = getprop(node, "reg", prop_buf, sizeof(prop_buf)) / 4;
	return dt_xlate(node, res, reglen, addr, size);
}

int dt_xlate_addr(void *node, u32 *buf, int buflen, unsigned long *xlated_addr)
{

	if (buflen > sizeof(prop_buf))
		return 0;

	memcpy(prop_buf, buf, buflen);
	return dt_xlate(node, 0, buflen / 4, xlated_addr, NULL);
}

int dt_is_compatible(void *node, const char *compat)
{
	char *buf = (char *)prop_buf;
	int len, pos;

	len = getprop(node, "compatible", buf, MAX_PROP_LEN);
	if (len < 0)
		return 0;

	for (pos = 0; pos < len; pos++) {
		if (!strcmp(buf + pos, compat))
			return 1;

		pos += strnlen(&buf[pos], len - pos);
	}

	return 0;
}

int dt_get_virtual_reg(void *node, void **addr, int nres)
{
	unsigned long xaddr;
	int n;

	n = getprop(node, "virtual-reg", addr, nres * 4);
	if (n > 0)
		return n / 4;

	for (n = 0; n < nres; n++) {
		if (!dt_xlate_reg(node, n, &xaddr, NULL))
			break;

		addr[n] = (void *)xaddr;
	}

	return n;
}
Commit	Line	Data
27fbaa97 DG	1	/*
	2	* devtree.c - convenience functions for device tree manipulation
	3	* Copyright 2007 David Gibson, IBM Corporation.
	4	* Copyright (c) 2007 Freescale Semiconductor, Inc.
	5	*
	6	* Authors: David Gibson <david@gibson.dropbear.id.au>
	7	* Scott Wood <scottwood@freescale.com>
	8	*
	9	* This program is free software; you can redistribute it and/or
	10	* modify it under the terms of the GNU General Public License
	11	* as published by the Free Software Foundation; either version
	12	* 2 of the License, or (at your option) any later version.
	13	*/
	14	#include <stdarg.h>
	15	#include <stddef.h>
	16	#include "types.h"
	17	#include "string.h"
	18	#include "stdio.h"
	19	#include "ops.h"
	20
	21	void dt_fixup_memory(u64 start, u64 size)
	22	{
	23	void root, memory;
	24	int naddr, nsize, i;
	25	u32 memreg[4];
	26
	27	root = finddevice("/");
	28	if (getprop(root, "#address-cells", &naddr, sizeof(naddr)) < 0)
	29	naddr = 2;
	30	if (naddr < 1 \|\| naddr > 2)
	31	fatal("Can't cope with #address-cells == %d in /\n\r", naddr);
	32
	33	if (getprop(root, "#size-cells", &nsize, sizeof(nsize)) < 0)
	34	nsize = 1;
	35	if (nsize < 1 \|\| nsize > 2)
	36	fatal("Can't cope with #size-cells == %d in /\n\r", nsize);
	37
	38	i = 0;
	39	if (naddr == 2)
	40	memreg[i++] = start >> 32;
	41	memreg[i++] = start & 0xffffffff;
	42	if (nsize == 2)
	43	memreg[i++] = size >> 32;
	44	memreg[i++] = size & 0xffffffff;
	45
	46	memory = finddevice("/memory");
	47	if (! memory) {
	48	memory = create_node(NULL, "memory");
	49	setprop_str(memory, "device_type", "memory");
	50	}
	51
	52	printf("Memory <- <0x%x", memreg[0]);
	53	for (i = 1; i < (naddr + nsize); i++)
	54	printf(" 0x%x", memreg[i]);
	55	printf("> (%ldMB)\n\r", (unsigned long)(size >> 20));
	56
	57	setprop(memory, "reg", memreg, (naddr + nsize)*sizeof(u32));
	58	}
	59
	60	#define MHZ(x) ((x + 500000) / 1000000)
	61
	62	void dt_fixup_cpu_clocks(u32 cpu, u32 tb, u32 bus)
	63	{
	64	void *devp = NULL;
65
66	printf("CPU clock-frequency <- 0x%x (%dMHz)\n\r", cpu, MHZ(cpu));
67	printf("CPU timebase-frequency <- 0x%x (%dMHz)\n\r", tb, MHZ(tb));
68	if (bus > 0)
69	printf("CPU bus-frequency <- 0x%x (%dMHz)\n\r", bus, MHZ(bus));
70
71	while ((devp = find_node_by_devtype(devp, "cpu"))) {
72	setprop_val(devp, "clock-frequency", cpu);
73	setprop_val(devp, "timebase-frequency", tb);
74	if (bus > 0)
75	setprop_val(devp, "bus-frequency", bus);
76	}
643d3c13 SW	77
643d3c13 SW	78	timebase_period_ns = 1000000000 / tb;
27fbaa97 DG	79	}
	80
	81	void dt_fixup_clock(const char *path, u32 freq)
	82	{
	83	void *devp = finddevice(path);
	84
	85	if (devp) {
	86	printf("%s: clock-frequency <- %x (%dMHz)\n\r", path, freq, MHZ(freq));
	87	setprop_val(devp, "clock-frequency", freq);
	88	}
	89	}
	90
ad160681 KG	91	void dt_fixup_mac_address_by_alias(const char alias, const u8 addr)
	92	{
	93	void *devp = find_node_by_alias(alias);
	94
	95	if (devp) {
	96	printf("%s: local-mac-address <-"
	97	" %02x:%02x:%02x:%02x:%02x:%02x\n\r", alias,
	98	addr[0], addr[1], addr[2],
	99	addr[3], addr[4], addr[5]);
	100
	101	setprop(devp, "local-mac-address", addr, 6);
	102	}
	103	}
	104
27ff35d9 SW	105	void dt_fixup_mac_address(u32 index, const u8 *addr)
	106	{
	107	void *devp = find_node_by_prop_value(NULL, "linux,network-index",
	108	(void*)&index, sizeof(index));
	109
	110	if (devp) {
	111	printf("ENET%d: local-mac-address <-"
	112	" %02x:%02x:%02x:%02x:%02x:%02x\n\r", index,
	113	addr[0], addr[1], addr[2],
	114	addr[3], addr[4], addr[5]);
	115
	116	setprop(devp, "local-mac-address", addr, 6);
	117	}
	118	}
	119
27fbaa97 DG	120	void __dt_fixup_mac_addresses(u32 startindex, ...)
	121	{
	122	va_list ap;
	123	u32 index = startindex;
27fbaa97 DG	124	const u8 *addr;
	125
	126	va_start(ap, startindex);
27fbaa97	127
27ff35d9 SW	128	while ((addr = va_arg(ap, const u8 *)))
27ff35d9 SW	129	dt_fixup_mac_address(index++, addr);
27fbaa97	130
27fbaa97 DG	131	va_end(ap);
27fbaa97 DG	132	}
6e1af384 SW	133
6e1af384 SW	134	#define MAX_ADDR_CELLS 4
6e1af384	135
e5d8d54d	136	void dt_get_reg_format(void node, u32 naddr, u32 *nsize)
6e1af384 SW	137	{
	138	if (getprop(node, "#address-cells", naddr, 4) != 4)
	139	*naddr = 2;
	140	if (getprop(node, "#size-cells", nsize, 4) != 4)
	141	*nsize = 1;
	142	}
	143
	144	static void copy_val(u32 dest, u32 src, int naddr)
	145	{
e4bb688d SW	146	int pad = MAX_ADDR_CELLS - naddr;
	147
	148	memset(dest, 0, pad * 4);
	149	memcpy(dest + pad, src, naddr * 4);
6e1af384 SW	150	}
	151
	152	static int sub_reg(u32 reg, u32 sub)
	153	{
	154	int i, borrow = 0;
	155
e4bb688d	156	for (i = MAX_ADDR_CELLS - 1; i >= 0; i--) {
6e1af384 SW	157	int prev_borrow = borrow;
	158	borrow = reg[i] < sub[i] + prev_borrow;
	159	reg[i] -= sub[i] + prev_borrow;
	160	}
	161
	162	return !borrow;
	163	}
	164
e4bb688d	165	static int add_reg(u32 reg, u32 add, int naddr)
6e1af384 SW	166	{
	167	int i, carry = 0;
	168
e4bb688d	169	for (i = MAX_ADDR_CELLS - 1; i >= MAX_ADDR_CELLS - naddr; i--) {
6e1af384 SW	170	u64 tmp = (u64)reg[i] + add[i] + carry;
	171	carry = tmp >> 32;
	172	reg[i] = (u32)tmp;
	173	}
	174
	175	return !carry;
	176	}
	177
	178	/* It is assumed that if the first byte of reg fits in a
	179	* range, then the whole reg block fits.
	180	*/
	181	static int compare_reg(u32 reg, u32 range, u32 *rangesize)
	182	{
	183	int i;
	184	u32 end;
	185
	186	for (i = 0; i < MAX_ADDR_CELLS; i++) {
	187	if (reg[i] < range[i])
	188	return 0;
	189	if (reg[i] > range[i])
	190	break;
	191	}
	192
	193	for (i = 0; i < MAX_ADDR_CELLS; i++) {
	194	end = range[i] + rangesize[i];
	195
	196	if (reg[i] < end)
	197	break;
	198	if (reg[i] > end)
	199	return 0;
	200	}
	201
	202	return reg[i] != end;
	203	}
	204
	205	/* reg must be MAX_ADDR_CELLS */
	206	static int find_range(u32 reg, u32 ranges, int nregaddr,
	207	int naddr, int nsize, int buflen)
	208	{
	209	int nrange = nregaddr + naddr + nsize;
	210	int i;
	211
	212	for (i = 0; i + nrange <= buflen; i += nrange) {
	213	u32 range_addr[MAX_ADDR_CELLS];
	214	u32 range_size[MAX_ADDR_CELLS];
	215
49e6e3f1	216	copy_val(range_addr, ranges + i, nregaddr);
6e1af384 SW	217	copy_val(range_size, ranges + i + nregaddr + naddr, nsize);
	218
	219	if (compare_reg(reg, range_addr, range_size))
	220	return i;
	221	}
	222
	223	return -1;
	224	}
	225
	226	/* Currently only generic buses without special encodings are supported.
	227	* In particular, PCI is not supported. Also, only the beginning of the
	228	* reg block is tracked; size is ignored except in ranges.
	229	*/
a73ac50c	230	static u32 prop_buf[MAX_PROP_LEN / 4];
8895ea48 MG	231
	232	static int dt_xlate(void node, int res, int reglen, unsigned long addr,
	233	unsigned long *size)
6e1af384 SW	234	{
	235	u32 last_addr[MAX_ADDR_CELLS];
	236	u32 this_addr[MAX_ADDR_CELLS];
6e1af384 SW	237	void *parent;
6e1af384 SW	238	u64 ret_addr, ret_size;
0602801c	239	u32 naddr, nsize, prev_naddr, prev_nsize;
6e1af384 SW	240	int buflen, offset;
	241
	242	parent = get_parent(node);
	243	if (!parent)
	244	return 0;
	245
e5d8d54d	246	dt_get_reg_format(parent, &naddr, &nsize);
6e1af384 SW	247
	248	if (nsize > 2)
	249	return 0;
	250
6e1af384 SW	251	offset = (naddr + nsize) * res;
6e1af384 SW	252
8895ea48	253	if (reglen < offset + naddr + nsize \|\|
a73ac50c	254	MAX_PROP_LEN < (offset + naddr + nsize) * 4)
6e1af384 SW	255	return 0;
6e1af384 SW	256
a73ac50c	257	copy_val(last_addr, prop_buf + offset, naddr);
6e1af384	258
a73ac50c	259	ret_size = prop_buf[offset + naddr];
6e1af384 SW	260	if (nsize == 2) {
6e1af384 SW	261	ret_size <<= 32;
a73ac50c	262	ret_size \|= prop_buf[offset + naddr + 1];
6e1af384 SW	263	}
6e1af384 SW	264
0602801c	265	for (;;) {
6e1af384	266	prev_naddr = naddr;
0602801c SW	267	prev_nsize = nsize;
0602801c SW	268	node = parent;
6e1af384	269
0602801c SW	270	parent = get_parent(node);
	271	if (!parent)
	272	break;
	273
e5d8d54d	274	dt_get_reg_format(parent, &naddr, &nsize);
6e1af384	275
a73ac50c SW	276	buflen = getprop(node, "ranges", prop_buf,
a73ac50c SW	277	sizeof(prop_buf));
0602801c	278	if (buflen == 0)
6e1af384	279	continue;
a73ac50c	280	if (buflen < 0 \|\| buflen > sizeof(prop_buf))
6e1af384 SW	281	return 0;
6e1af384 SW	282
a73ac50c	283	offset = find_range(last_addr, prop_buf, prev_naddr,
0602801c	284	naddr, prev_nsize, buflen / 4);
6e1af384 SW	285
	286	if (offset < 0)
	287	return 0;
	288
a73ac50c	289	copy_val(this_addr, prop_buf + offset, prev_naddr);
6e1af384 SW	290
	291	if (!sub_reg(last_addr, this_addr))
	292	return 0;
	293
a73ac50c	294	copy_val(this_addr, prop_buf + offset + prev_naddr, naddr);
6e1af384	295
e4bb688d	296	if (!add_reg(last_addr, this_addr, naddr))
6e1af384 SW	297	return 0;
	298	}
	299
	300	if (naddr > 2)
	301	return 0;
	302
e4bb688d	303	ret_addr = ((u64)last_addr[2] << 32) \| last_addr[3];
6e1af384 SW	304
	305	if (sizeof(void *) == 4 &&
	306	(ret_addr >= 0x100000000ULL \|\| ret_size > 0x100000000ULL \|\|
	307	ret_addr + ret_size > 0x100000000ULL))
	308	return 0;
	309
	310	*addr = ret_addr;
	311	if (size)
	312	*size = ret_size;
	313
	314	return 1;
	315	}
8895ea48 MG	316
	317	int dt_xlate_reg(void node, int res, unsigned long addr, unsigned long *size)
	318	{
	319	int reglen;
	320
a73ac50c	321	reglen = getprop(node, "reg", prop_buf, sizeof(prop_buf)) / 4;
8895ea48 MG	322	return dt_xlate(node, res, reglen, addr, size);
	323	}
	324
	325	int dt_xlate_addr(void node, u32 buf, int buflen, unsigned long *xlated_addr)
	326	{
	327
a73ac50c	328	if (buflen > sizeof(prop_buf))
8895ea48 MG	329	return 0;
8895ea48 MG	330
a73ac50c	331	memcpy(prop_buf, buf, buflen);
8895ea48 MG	332	return dt_xlate(node, 0, buflen / 4, xlated_addr, NULL);
8895ea48 MG	333	}
a73ac50c SW	334
	335	int dt_is_compatible(void node, const char compat)
	336	{
	337	char buf = (char )prop_buf;
	338	int len, pos;
	339
	340	len = getprop(node, "compatible", buf, MAX_PROP_LEN);
	341	if (len < 0)
	342	return 0;
	343
	344	for (pos = 0; pos < len; pos++) {
	345	if (!strcmp(buf + pos, compat))
	346	return 1;
	347
	348	pos += strnlen(&buf[pos], len - pos);
	349	}
	350
	351	return 0;
	352	}
da0a5f0c LP	353
	354	int dt_get_virtual_reg(void node, void *addr, int nres)
	355	{
	356	unsigned long xaddr;
	357	int n;
	358
	359	n = getprop(node, "virtual-reg", addr, nres * 4);
	360	if (n > 0)
	361	return n / 4;
	362
	363	for (n = 0; n < nres; n++) {
	364	if (!dt_xlate_reg(node, n, &xaddr, NULL))
	365	break;
	366
	367	addr[n] = (void *)xaddr;
	368	}
	369
	370	return n;
	371	}
	372