1 // SPDX-License-Identifier: GPL-2.0
3  * Common EFI memory map functions.
19  * __efi_memmap_init - Common code for mapping the EFI memory map
20  * @data: EFI memory map data
23  * map the EFI memory map in efi.memmap based on how far into the boot
26  * During bootup EFI_MEMMAP_LATE in data->flags should be clear since we
35 	struct efi_memory_map map;  in __efi_memmap_init()  local
38 	phys_map = data->phys_map;  in __efi_memmap_init()
40 	if (data->flags & EFI_MEMMAP_LATE)  in __efi_memmap_init()
41 		map.map = memremap(phys_map, data->size, MEMREMAP_WB);  in __efi_memmap_init()
43 		map.map = early_memremap(phys_map, data->size);  in __efi_memmap_init()
45 	if (!map.map) {  in __efi_memmap_init()
46 		pr_err("Could not map the memory map! phys_map=%pa, size=0x%lx\n",  in __efi_memmap_init()
47 			&phys_map, data->size);  in __efi_memmap_init()
48 		return -ENOMEM;  in __efi_memmap_init()
51 	map.phys_map = data->phys_map;  in __efi_memmap_init()
52 	map.nr_map = data->size / data->desc_size;  in __efi_memmap_init()
53 	map.map_end = map.map + data->size;  in __efi_memmap_init()
55 	map.desc_version = data->desc_version;  in __efi_memmap_init()
56 	map.desc_size = data->desc_size;  in __efi_memmap_init()
57 	map.flags = data->flags;  in __efi_memmap_init()
61 	efi.memmap = map;  in __efi_memmap_init()
67  * efi_memmap_init_early - Map the EFI memory map data structure
68  * @data: EFI memory map data
70  * Use early_memremap() to map the passed in EFI memory map and assign
80 	data->flags = 0;  in efi_memmap_init_early()
93 		early_memunmap(efi.memmap.map, size);  in efi_memmap_unmap()
95 		memunmap(efi.memmap.map);  in efi_memmap_unmap()
98 	efi.memmap.map = NULL;  in efi_memmap_unmap()
103  * efi_memmap_init_late - Map efi.memmap with memremap()
104  * @addr: Physical address of the new EFI memory map
105  * @size: Size in bytes of the new EFI memory map
107  * Setup a mapping of the EFI memory map using ioremap_cache(). This
116  * initialisation is complete as the fixmap space used to map the EFI
134 	WARN_ON(efi.memmap.map);  in efi_memmap_init_late()