size = 16;
finish_node(allnodes, &size, 1);
size -= 16;
- end = start = (unsigned long) __va(lmb_alloc(size, 128));
+
+ if (0 == size)
+ end = start = 0;
+ else
+ end = start = (unsigned long)__va(lmb_alloc(size, 128));
+
finish_node(allnodes, &end, 0);
BUG_ON(end != start + size);
#endif
#ifdef CONFIG_PPC_RTAS
- /* To help early debugging via the front panel, we retreive a minimal
+ /* To help early debugging via the front panel, we retrieve a minimal
* set of RTAS infos now if available
*/
{
static void __init early_reserve_mem(void)
{
- unsigned long base, size;
- unsigned long *reserve_map;
+ u64 base, size;
+ u64 *reserve_map;
- reserve_map = (unsigned long *)(((unsigned long)initial_boot_params) +
+ reserve_map = (u64 *)(((unsigned long)initial_boot_params) +
initial_boot_params->off_mem_rsvmap);
+#ifdef CONFIG_PPC32
+ /*
+ * Handle the case where we might be booting from an old kexec
+ * image that setup the mem_rsvmap as pairs of 32-bit values
+ */
+ if (*reserve_map > 0xffffffffull) {
+ u32 base_32, size_32;
+ u32 *reserve_map_32 = (u32 *)reserve_map;
+
+ while (1) {
+ base_32 = *(reserve_map_32++);
+ size_32 = *(reserve_map_32++);
+ if (size_32 == 0)
+ break;
+ DBG("reserving: %lx -> %lx\n", base_32, size_32);
+ lmb_reserve(base_32, size_32);
+ }
+ return;
+ }
+#endif
while (1) {
base = *(reserve_map++);
size = *(reserve_map++);
if (size == 0)
break;
- DBG("reserving: %lx -> %lx\n", base, size);
+ DBG("reserving: %llx -> %llx\n", base, size);
lmb_reserve(base, size);
}
read_lock(&devtree_lock);
np = from ? from->allnext : allnodes;
- for (; np != 0; np = np->allnext)
- if (np->name != 0 && strcasecmp(np->name, name) == 0
+ for (; np != NULL; np = np->allnext)
+ if (np->name != NULL && strcasecmp(np->name, name) == 0
&& of_node_get(np))
break;
if (from)
kfree(prop->value);
kfree(prop);
prop = next;
+
+ if (!prop) {
+ prop = node->deadprops;
+ node->deadprops = NULL;
+ }
}
kfree(node->intrs);
kfree(node->full_name);
__initcall(prom_reconfig_setup);
#endif
-/*
- * Find a property with a given name for a given node
- * and return the value.
- */
-unsigned char *get_property(struct device_node *np, const char *name,
- int *lenp)
+struct property *of_find_property(struct device_node *np, const char *name,
+ int *lenp)
{
struct property *pp;
+ read_lock(&devtree_lock);
for (pp = np->properties; pp != 0; pp = pp->next)
if (strcmp(pp->name, name) == 0) {
if (lenp != 0)
*lenp = pp->length;
- return pp->value;
+ break;
}
- return NULL;
+ read_unlock(&devtree_lock);
+
+ return pp;
+}
+
+/*
+ * Find a property with a given name for a given node
+ * and return the value.
+ */
+unsigned char *get_property(struct device_node *np, const char *name,
+ int *lenp)
+{
+ struct property *pp = of_find_property(np,name,lenp);
+ return pp ? pp->value : NULL;
}
EXPORT_SYMBOL(get_property);
return 0;
}
+/*
+ * Remove a property from a node. Note that we don't actually
+ * remove it, since we have given out who-knows-how-many pointers
+ * to the data using get-property. Instead we just move the property
+ * to the "dead properties" list, so it won't be found any more.
+ */
+int prom_remove_property(struct device_node *np, struct property *prop)
+{
+ struct property **next;
+ int found = 0;
+
+ write_lock(&devtree_lock);
+ next = &np->properties;
+ while (*next) {
+ if (*next == prop) {
+ /* found the node */
+ *next = prop->next;
+ prop->next = np->deadprops;
+ np->deadprops = prop;
+ found = 1;
+ break;
+ }
+ next = &(*next)->next;
+ }
+ write_unlock(&devtree_lock);
+
+ if (!found)
+ return -ENODEV;
+
+#ifdef CONFIG_PROC_DEVICETREE
+ /* try to remove the proc node as well */
+ if (np->pde)
+ proc_device_tree_remove_prop(np->pde, prop);
+#endif /* CONFIG_PROC_DEVICETREE */
+
+ return 0;
+}
+
+/*
+ * Update a property in a node. Note that we don't actually
+ * remove it, since we have given out who-knows-how-many pointers
+ * to the data using get-property. Instead we just move the property
+ * to the "dead properties" list, and add the new property to the
+ * property list
+ */
+int prom_update_property(struct device_node *np,
+ struct property *newprop,
+ struct property *oldprop)
+{
+ struct property **next;
+ int found = 0;
+
+ write_lock(&devtree_lock);
+ next = &np->properties;
+ while (*next) {
+ if (*next == oldprop) {
+ /* found the node */
+ newprop->next = oldprop->next;
+ *next = newprop;
+ oldprop->next = np->deadprops;
+ np->deadprops = oldprop;
+ found = 1;
+ break;
+ }
+ next = &(*next)->next;
+ }
+ write_unlock(&devtree_lock);
+
+ if (!found)
+ return -ENODEV;
+
+#ifdef CONFIG_PROC_DEVICETREE
+ /* try to add to proc as well if it was initialized */
+ if (np->pde)
+ proc_device_tree_update_prop(np->pde, newprop, oldprop);
+#endif /* CONFIG_PROC_DEVICETREE */
+
+ return 0;
+}
+
+#ifdef CONFIG_KEXEC
+/* We may have allocated the flat device tree inside the crash kernel region
+ * in prom_init. If so we need to move it out into regular memory. */
+void kdump_move_device_tree(void)
+{
+ unsigned long start, end;
+ struct boot_param_header *new;
+
+ start = __pa((unsigned long)initial_boot_params);
+ end = start + initial_boot_params->totalsize;
+
+ if (end < crashk_res.start || start > crashk_res.end)
+ return;
+ new = (struct boot_param_header*)
+ __va(lmb_alloc(initial_boot_params->totalsize, PAGE_SIZE));
+
+ memcpy(new, initial_boot_params, initial_boot_params->totalsize);
+
+ initial_boot_params = new;
+
+ DBG("Flat device tree blob moved to %p\n", initial_boot_params);
+
+ /* XXX should we unreserve the old DT? */
+}
+#endif /* CONFIG_KEXEC */
projects / linux-2.6-omap-h63xx.git / blobdiff