+ efi_status_t r;
+ struct efi_pool_allocation *alloc;
+ u64 num_pages = (size + sizeof(struct efi_pool_allocation) +
+ EFI_PAGE_MASK) >> EFI_PAGE_SHIFT;
+
+ if (!buffer)
+ return EFI_INVALID_PARAMETER;
+
+ if (size == 0) {
+ *buffer = NULL;
+ return EFI_SUCCESS;
+ }
+
+ r = efi_allocate_pages(EFI_ALLOCATE_ANY_PAGES, pool_type, num_pages,
+ (uint64_t *)&alloc);
+
+ if (r == EFI_SUCCESS) {
+ alloc->num_pages = num_pages;
+ *buffer = alloc->data;
+ }
+
+ return r;
+}
+
+/*
+ * Free memory from pool.
+ *
+ * @buffer start of memory to be freed
+ * @return status code
+ */
+efi_status_t efi_free_pool(void *buffer)
+{
+ efi_status_t r;
+ struct efi_pool_allocation *alloc;
+
+ if (buffer == NULL)
+ return EFI_INVALID_PARAMETER;
+
+ alloc = container_of(buffer, struct efi_pool_allocation, data);
+ /* Sanity check, was the supplied address returned by allocate_pool */
+ assert(((uintptr_t)alloc & EFI_PAGE_MASK) == 0);
+
+ r = efi_free_pages((uintptr_t)alloc, alloc->num_pages);
+
+ return r;
+}
+
+/*
+ * Get map describing memory usage.
+ *
+ * @memory_map_size on entry the size, in bytes, of the memory map buffer,
+ * on exit the size of the copied memory map
+ * @memory_map buffer to which the memory map is written
+ * @map_key key for the memory map
+ * @descriptor_size size of an individual memory descriptor
+ * @descriptor_version version number of the memory descriptor structure
+ * @return status code
+ */
+efi_status_t efi_get_memory_map(efi_uintn_t *memory_map_size,
+ struct efi_mem_desc *memory_map,
+ efi_uintn_t *map_key,
+ efi_uintn_t *descriptor_size,
+ uint32_t *descriptor_version)
+{
+ efi_uintn_t map_size = 0;
projects / J-u-boot.git / blobdiff