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Diffstat (limited to 'kernel/resource.c')
-rw-r--r--kernel/resource.c90
1 files changed, 65 insertions, 25 deletions
diff --git a/kernel/resource.c b/kernel/resource.c
index e3080fcc66a..bf1130d81b7 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -23,20 +23,18 @@
struct resource ioport_resource = {
.name = "PCI IO",
- .start = 0x0000,
+ .start = 0,
.end = IO_SPACE_LIMIT,
.flags = IORESOURCE_IO,
};
-
EXPORT_SYMBOL(ioport_resource);
struct resource iomem_resource = {
.name = "PCI mem",
- .start = 0UL,
- .end = ~0UL,
+ .start = 0,
+ .end = -1,
.flags = IORESOURCE_MEM,
};
-
EXPORT_SYMBOL(iomem_resource);
static DEFINE_RWLOCK(resource_lock);
@@ -83,10 +81,10 @@ static int r_show(struct seq_file *m, void *v)
for (depth = 0, p = r; depth < MAX_IORES_LEVEL; depth++, p = p->parent)
if (p->parent == root)
break;
- seq_printf(m, "%*s%0*lx-%0*lx : %s\n",
+ seq_printf(m, "%*s%0*llx-%0*llx : %s\n",
depth * 2, "",
- width, r->start,
- width, r->end,
+ width, (unsigned long long) r->start,
+ width, (unsigned long long) r->end,
r->name ? r->name : "<BAD>");
return 0;
}
@@ -151,8 +149,8 @@ __initcall(ioresources_init);
/* Return the conflict entry if you can't request it */
static struct resource * __request_resource(struct resource *root, struct resource *new)
{
- unsigned long start = new->start;
- unsigned long end = new->end;
+ resource_size_t start = new->start;
+ resource_size_t end = new->end;
struct resource *tmp, **p;
if (end < start)
@@ -232,15 +230,52 @@ int release_resource(struct resource *old)
EXPORT_SYMBOL(release_resource);
+#ifdef CONFIG_MEMORY_HOTPLUG
+/*
+ * Finds the lowest memory reosurce exists within [res->start.res->end)
+ * the caller must specify res->start, res->end, res->flags.
+ * If found, returns 0, res is overwritten, if not found, returns -1.
+ */
+int find_next_system_ram(struct resource *res)
+{
+ resource_size_t start, end;
+ struct resource *p;
+
+ BUG_ON(!res);
+
+ start = res->start;
+ end = res->end;
+
+ read_lock(&resource_lock);
+ for (p = iomem_resource.child; p ; p = p->sibling) {
+ /* system ram is just marked as IORESOURCE_MEM */
+ if (p->flags != res->flags)
+ continue;
+ if (p->start > end) {
+ p = NULL;
+ break;
+ }
+ if (p->start >= start)
+ break;
+ }
+ read_unlock(&resource_lock);
+ if (!p)
+ return -1;
+ /* copy data */
+ res->start = p->start;
+ res->end = p->end;
+ return 0;
+}
+#endif
+
/*
* Find empty slot in the resource tree given range and alignment.
*/
static int find_resource(struct resource *root, struct resource *new,
- unsigned long size,
- unsigned long min, unsigned long max,
- unsigned long align,
+ resource_size_t size, resource_size_t min,
+ resource_size_t max, resource_size_t align,
void (*alignf)(void *, struct resource *,
- unsigned long, unsigned long),
+ resource_size_t, resource_size_t),
void *alignf_data)
{
struct resource *this = root->child;
@@ -282,11 +317,10 @@ static int find_resource(struct resource *root, struct resource *new,
* Allocate empty slot in the resource tree given range and alignment.
*/
int allocate_resource(struct resource *root, struct resource *new,
- unsigned long size,
- unsigned long min, unsigned long max,
- unsigned long align,
+ resource_size_t size, resource_size_t min,
+ resource_size_t max, resource_size_t align,
void (*alignf)(void *, struct resource *,
- unsigned long, unsigned long),
+ resource_size_t, resource_size_t),
void *alignf_data)
{
int err;
@@ -378,10 +412,10 @@ EXPORT_SYMBOL(insert_resource);
* arguments. Returns -EBUSY if it can't fit. Existing children of
* the resource are assumed to be immutable.
*/
-int adjust_resource(struct resource *res, unsigned long start, unsigned long size)
+int adjust_resource(struct resource *res, resource_size_t start, resource_size_t size)
{
struct resource *tmp, *parent = res->parent;
- unsigned long end = start + size - 1;
+ resource_size_t end = start + size - 1;
int result = -EBUSY;
write_lock(&resource_lock);
@@ -428,7 +462,9 @@ EXPORT_SYMBOL(adjust_resource);
*
* Release-region releases a matching busy region.
*/
-struct resource * __request_region(struct resource *parent, unsigned long start, unsigned long n, const char *name)
+struct resource * __request_region(struct resource *parent,
+ resource_size_t start, resource_size_t n,
+ const char *name)
{
struct resource *res = kzalloc(sizeof(*res), GFP_KERNEL);
@@ -464,7 +500,8 @@ struct resource * __request_region(struct resource *parent, unsigned long start,
EXPORT_SYMBOL(__request_region);
-int __check_region(struct resource *parent, unsigned long start, unsigned long n)
+int __check_region(struct resource *parent, resource_size_t start,
+ resource_size_t n)
{
struct resource * res;
@@ -479,10 +516,11 @@ int __check_region(struct resource *parent, unsigned long start, unsigned long n
EXPORT_SYMBOL(__check_region);
-void __release_region(struct resource *parent, unsigned long start, unsigned long n)
+void __release_region(struct resource *parent, resource_size_t start,
+ resource_size_t n)
{
struct resource **p;
- unsigned long end;
+ resource_size_t end;
p = &parent->child;
end = start + n - 1;
@@ -511,7 +549,9 @@ void __release_region(struct resource *parent, unsigned long start, unsigned lon
write_unlock(&resource_lock);
- printk(KERN_WARNING "Trying to free nonexistent resource <%08lx-%08lx>\n", start, end);
+ printk(KERN_WARNING "Trying to free nonexistent resource "
+ "<%016llx-%016llx>\n", (unsigned long long)start,
+ (unsigned long long)end);
}
EXPORT_SYMBOL(__release_region);