123 lines
2.5 KiB
C
123 lines
2.5 KiB
C
/* prom_common.c: OF device tree support common code.
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*
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* Paul Mackerras August 1996.
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* Copyright (C) 1996-2005 Paul Mackerras.
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*
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* Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.
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* {engebret|bergner}@us.ibm.com
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*
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* Adapted for sparc by David S. Miller davem@davemloft.net
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/mutex.h>
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#include <linux/slab.h>
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#include <linux/of.h>
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#include <asm/prom.h>
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#include <asm/oplib.h>
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#include <asm/leon.h>
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#include "prom.h"
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struct device_node *of_console_device;
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EXPORT_SYMBOL(of_console_device);
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char *of_console_path;
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EXPORT_SYMBOL(of_console_path);
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char *of_console_options;
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EXPORT_SYMBOL(of_console_options);
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int of_getintprop_default(struct device_node *np, const char *name, int def)
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{
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struct property *prop;
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int len;
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prop = of_find_property(np, name, &len);
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if (!prop || len != 4)
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return def;
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return *(int *) prop->value;
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}
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EXPORT_SYMBOL(of_getintprop_default);
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DEFINE_MUTEX(of_set_property_mutex);
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EXPORT_SYMBOL(of_set_property_mutex);
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int of_set_property(struct device_node *dp, const char *name, void *val, int len)
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{
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struct property **prevp;
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void *new_val;
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int err;
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new_val = kmalloc(len, GFP_KERNEL);
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if (!new_val)
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return -ENOMEM;
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memcpy(new_val, val, len);
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err = -ENODEV;
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mutex_lock(&of_set_property_mutex);
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write_lock(&devtree_lock);
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prevp = &dp->properties;
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while (*prevp) {
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struct property *prop = *prevp;
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if (!strcasecmp(prop->name, name)) {
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void *old_val = prop->value;
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int ret;
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ret = prom_setprop(dp->phandle, name, val, len);
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err = -EINVAL;
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if (ret >= 0) {
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prop->value = new_val;
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prop->length = len;
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if (OF_IS_DYNAMIC(prop))
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kfree(old_val);
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OF_MARK_DYNAMIC(prop);
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err = 0;
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}
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break;
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}
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prevp = &(*prevp)->next;
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}
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write_unlock(&devtree_lock);
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mutex_unlock(&of_set_property_mutex);
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/* XXX Upate procfs if necessary... */
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return err;
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}
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EXPORT_SYMBOL(of_set_property);
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int of_find_in_proplist(const char *list, const char *match, int len)
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{
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while (len > 0) {
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int l;
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if (!strcmp(list, match))
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return 1;
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l = strlen(list) + 1;
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list += l;
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len -= l;
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}
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return 0;
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}
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EXPORT_SYMBOL(of_find_in_proplist);
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unsigned int prom_early_allocated __initdata;
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#include "../../../drivers/of/pdt.c"
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