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-rw-r--r--arch/x86/kernel/e820.c26
1 files changed, 23 insertions, 3 deletions
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index 532da61d605c..71c11ad5643e 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -96,7 +96,8 @@ EXPORT_SYMBOL_GPL(e820__mapped_any);
* Note: this function only works correctly once the E820 table is sorted and
* not-overlapping (at least for the range specified), which is the case normally.
*/
-bool __init e820__mapped_all(u64 start, u64 end, enum e820_type type)
+static struct e820_entry *__e820__mapped_all(u64 start, u64 end,
+ enum e820_type type)
{
int i;
@@ -122,9 +123,28 @@ bool __init e820__mapped_all(u64 start, u64 end, enum e820_type type)
* coverage of the desired range exists:
*/
if (start >= end)
- return 1;
+ return entry;
}
- return 0;
+
+ return NULL;
+}
+
+/*
+ * This function checks if the entire range <start,end> is mapped with type.
+ */
+bool __init e820__mapped_all(u64 start, u64 end, enum e820_type type)
+{
+ return __e820__mapped_all(start, end, type);
+}
+
+/*
+ * This function returns the type associated with the range <start,end>.
+ */
+int e820__get_entry_type(u64 start, u64 end)
+{
+ struct e820_entry *entry = __e820__mapped_all(start, end, 0);
+
+ return entry ? entry->type : -EINVAL;
}
/*