[PATCH part1 v2 2/9] ps3: Add helper functions to read highmem info from the repository

[Andre Heider <a.heider@gmail.com>]

An earlier step in the boot chain can preallocate the highmem region.
A boot loader doing so will place the region infos in the repository.
Provide helper functions to read the required nodes.

Signed-off-by: Andre Heider <a.heider@gmail.com>
---
 arch/powerpc/platforms/ps3/platform.h   |    3 ++
 arch/powerpc/platforms/ps3/repository.c |   36 +++++++++++++++++++++++++++++++
 2 files changed, 39 insertions(+), 0 deletions(-)

diff --git a/arch/powerpc/platforms/ps3/platform.h b/arch/powerpc/platforms/ps3/platform.h
index 9a196a8..d9b4ec0 100644
--- a/arch/powerpc/platforms/ps3/platform.h
+++ b/arch/powerpc/platforms/ps3/platform.h
@@ -187,6 +187,9 @@ int ps3_repository_read_rm_size(unsigned int ppe_id, u64 *rm_size);
 int ps3_repository_read_region_total(u64 *region_total);
 int ps3_repository_read_mm_info(u64 *rm_base, u64 *rm_size,
 	u64 *region_total);
+int ps3_repository_read_highmem_base(u64 *highmem_base);
+int ps3_repository_read_highmem_size(u64 *highmem_size);
+int ps3_repository_read_highmem_info(u64 *highmem_base, u64 *highmem_size);
 
 /* repository pme info */
 
diff --git a/arch/powerpc/platforms/ps3/repository.c b/arch/powerpc/platforms/ps3/repository.c
index 5e304c2..9908d61 100644
--- a/arch/powerpc/platforms/ps3/repository.c
+++ b/arch/powerpc/platforms/ps3/repository.c
@@ -778,6 +778,42 @@ int ps3_repository_read_mm_info(u64 *rm_base, u64 *rm_size, u64 *region_total)
 		: ps3_repository_read_region_total(region_total);
 }
 
+int ps3_repository_read_highmem_base(u64 *highmem_base)
+{
+	return read_node(PS3_LPAR_ID_CURRENT,
+			 make_first_field("bi", 0),
+			 make_field("highmem", 0),
+			 make_field("base", 0),
+			 0,
+			 highmem_base, NULL);
+}
+
+int ps3_repository_read_highmem_size(u64 *highmem_size)
+{
+	return read_node(PS3_LPAR_ID_CURRENT,
+			 make_first_field("bi", 0),
+			 make_field("highmem", 0),
+			 make_field("size", 0),
+			 0,
+			 highmem_size, NULL);
+}
+
+/**
+ * ps3_repository_read_highmem_info - Read high memory info
+ * @highmem_base: High memory base address.
+ * @highmem_size: High mode memory size.
+ */
+
+int ps3_repository_read_highmem_info(u64 *highmem_base, u64 *highmem_size)
+{
+	int result;
+
+	*highmem_base = 0;
+	result = ps3_repository_read_highmem_base(highmem_base);
+	return result ? result
+		: ps3_repository_read_highmem_size(highmem_size);
+}
+
 /**
  * ps3_repository_read_num_spu_reserved - Number of physical spus reserved.
  * @num_spu: Number of physical spus.
-- 
1.7.5.4