1 // SPDX-License-Identifier: GPL-2.0
9  * efi_allocate_pages_aligned() - Allocate memory pages
10  * @size:	minimum number of bytes to allocate
13  *		architecture dependent multiple of the page size.
16  * @align:	minimum alignment of the base of the allocation
20  * to @align, which should be >= EFI_ALLOC_ALIGN. The last allocated page will
25 efi_status_t efi_allocate_pages_aligned(unsigned long size, unsigned long *addr,  in efi_allocate_pages_aligned()  argument
26 					unsigned long max, unsigned long align,  in efi_allocate_pages_aligned()  argument
35 	if (align < EFI_ALLOC_ALIGN)  in efi_allocate_pages_aligned()
36 		align = EFI_ALLOC_ALIGN;  in efi_allocate_pages_aligned()
38 	alloc_addr = ALIGN_DOWN(max + 1, align) - 1;  in efi_allocate_pages_aligned()
39 	size = round_up(size, EFI_ALLOC_ALIGN);  in efi_allocate_pages_aligned()
40 	slack = align / EFI_PAGE_SIZE - 1;  in efi_allocate_pages_aligned()
43 			     memory_type, size / EFI_PAGE_SIZE + slack,  in efi_allocate_pages_aligned()
48 	*addr = ALIGN((unsigned long)alloc_addr, align);  in efi_allocate_pages_aligned()
51 		int l = (alloc_addr & (align - 1)) / EFI_PAGE_SIZE;  in efi_allocate_pages_aligned()
54 			efi_bs_call(free_pages, alloc_addr, slack - l + 1);  in efi_allocate_pages_aligned()
55 			slack = l - 1;  in efi_allocate_pages_aligned()
58 			efi_bs_call(free_pages, *addr + size, slack);  in efi_allocate_pages_aligned()