File 0019-efi_loader-Move-efi_allocate_pool-i.patch of Package u-boot

From 0fb9e016dc83f2946d1e0d291e945dbf9a25bddc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Stefan=20Br=C3=BCns?= <stefan.bruens@rwth-aachen.de>
Date: Sun, 9 Oct 2016 22:17:18 +0200
Subject: [PATCH] efi_loader: Move efi_allocate_pool implementation to
 efi_memory.c
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We currently handle efi_allocate_pool() in our boot time service
file. In the following patch, pool allocation will receive additional
internal semantics that we should preserve inside efi_memory.c instead.

As foundation for those changes, split the function into an externally
facing efi_allocate_pool_ext() for use by payloads and an internal helper
efi_allocate_pool() in efi_memory.c that handles the actual allocation.

While at it, change the magic 0xfff / 12 constants to the more obvious
EFI_PAGE_MASK/SHIFT defines.

Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
Reviewed-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
---
 include/efi_loader.h          |  3 +++
 lib/efi_loader/efi_boottime.c | 11 +++++------
 lib/efi_loader/efi_memory.c   | 14 ++++++++++++++
 3 files changed, 22 insertions(+), 6 deletions(-)

diff --git a/include/efi_loader.h b/include/efi_loader.h
index b0e8a7f..62ff09b 100644
--- a/include/efi_loader.h
+++ b/include/efi_loader.h
@@ -121,6 +121,9 @@ efi_status_t efi_allocate_pages(int type, int memory_type, unsigned long pages,
 				uint64_t *memory);
 /* EFI memory free function. Not implemented today */
 efi_status_t efi_free_pages(uint64_t memory, unsigned long pages);
+/* EFI memory allocator for small allocations */
+efi_status_t efi_allocate_pool(int pool_type, unsigned long size,
+			       void **buffer);
 /* Returns the EFI memory map */
 efi_status_t efi_get_memory_map(unsigned long *memory_map_size,
 				struct efi_mem_desc *memory_map,
diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c
index 63f6b09..03ad5ce 100644
--- a/lib/efi_loader/efi_boottime.c
+++ b/lib/efi_loader/efi_boottime.c
@@ -130,15 +130,14 @@ efi_status_t EFIAPI efi_get_memory_map_ext(unsigned long *memory_map_size,
 	return EFI_EXIT(r);
 }
 
-static efi_status_t EFIAPI efi_allocate_pool(int pool_type, unsigned long size,
-					     void **buffer)
+static efi_status_t EFIAPI efi_allocate_pool_ext(int pool_type,
+						 unsigned long size,
+						 void **buffer)
 {
 	efi_status_t r;
-	efi_physical_addr_t t;
 
 	EFI_ENTRY("%d, %ld, %p", pool_type, size, buffer);
-	r = efi_allocate_pages(0, pool_type, (size + 0xfff) >> 12, &t);
-	*buffer = (void *)(uintptr_t)t;
+	r = efi_allocate_pool(pool_type, size, buffer);
 	return EFI_EXIT(r);
 }
 
@@ -740,7 +739,7 @@ static const struct efi_boot_services efi_boot_services = {
 	.allocate_pages = efi_allocate_pages_ext,
 	.free_pages = efi_free_pages_ext,
 	.get_memory_map = efi_get_memory_map_ext,
-	.allocate_pool = efi_allocate_pool,
+	.allocate_pool = efi_allocate_pool_ext,
 	.free_pool = efi_free_pool,
 	.create_event = efi_create_event,
 	.set_timer = efi_set_timer,
diff --git a/lib/efi_loader/efi_memory.c b/lib/efi_loader/efi_memory.c
index 1d23783..be642f1 100644
--- a/lib/efi_loader/efi_memory.c
+++ b/lib/efi_loader/efi_memory.c
@@ -327,6 +327,20 @@ efi_status_t efi_free_pages(uint64_t memory, unsigned long pages)
 	return EFI_SUCCESS;
 }
 
+efi_status_t efi_allocate_pool(int pool_type, unsigned long size,
+			       void **buffer)
+{
+	efi_status_t r;
+	efi_physical_addr_t t;
+	u64 num_pages = (size + EFI_PAGE_MASK) >> EFI_PAGE_SHIFT;
+
+	r = efi_allocate_pages(0, pool_type, num_pages, &t);
+	if (r == EFI_SUCCESS)
+		*buffer = (void *)(uintptr_t)t;
+
+	return r;
+}
+
 efi_status_t efi_get_memory_map(unsigned long *memory_map_size,
 			       struct efi_mem_desc *memory_map,
 			       unsigned long *map_key,