diff options
Diffstat (limited to 'drivers/firmware/efi/efi.c')
-rw-r--r-- | drivers/firmware/efi/efi.c | 129 |
1 files changed, 0 insertions, 129 deletions
diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c index 8a5e0db72b8f..d4886fd50c16 100644 --- a/drivers/firmware/efi/efi.c +++ b/drivers/firmware/efi/efi.c @@ -516,135 +516,6 @@ int __init efi_config_init(efi_config_table_type_t *arch_tables) return ret; } -/** - * __efi_memmap_init - Common code for mapping the EFI memory map - * @data: EFI memory map data - * @late: Use early or late mapping function? - * - * This function takes care of figuring out which function to use to - * map the EFI memory map in efi.memmap based on how far into the boot - * we are. - * - * During bootup @late should be %false since we only have access to - * the early_memremap*() functions as the vmalloc space isn't setup. - * Once the kernel is fully booted we can fallback to the more robust - * memremap*() API. - * - * Returns zero on success, a negative error code on failure. - */ -static int __init -__efi_memmap_init(struct efi_memory_map_data *data, bool late) -{ - struct efi_memory_map map; - phys_addr_t phys_map; - - if (efi_enabled(EFI_PARAVIRT)) - return 0; - - phys_map = data->phys_map; - - if (late) - map.map = memremap(phys_map, data->size, MEMREMAP_WB); - else - map.map = early_memremap(phys_map, data->size); - - if (!map.map) { - pr_err("Could not map the memory map!\n"); - return -ENOMEM; - } - - map.phys_map = data->phys_map; - map.nr_map = data->size / data->desc_size; - map.map_end = map.map + data->size; - - map.desc_version = data->desc_version; - map.desc_size = data->desc_size; - map.late = late; - - set_bit(EFI_MEMMAP, &efi.flags); - - efi.memmap = map; - - return 0; -} - -/** - * efi_memmap_init_early - Map the EFI memory map data structure - * @data: EFI memory map data - * - * Use early_memremap() to map the passed in EFI memory map and assign - * it to efi.memmap. - */ -int __init efi_memmap_init_early(struct efi_memory_map_data *data) -{ - /* Cannot go backwards */ - WARN_ON(efi.memmap.late); - - return __efi_memmap_init(data, false); -} - -void __init efi_memmap_unmap(void) -{ - if (!efi.memmap.late) { - unsigned long size; - - size = efi.memmap.desc_size * efi.memmap.nr_map; - early_memunmap(efi.memmap.map, size); - } else { - memunmap(efi.memmap.map); - } - - efi.memmap.map = NULL; - clear_bit(EFI_MEMMAP, &efi.flags); -} - -/** - * efi_memmap_init_late - Map efi.memmap with memremap() - * @phys_addr: Physical address of the new EFI memory map - * @size: Size in bytes of the new EFI memory map - * - * Setup a mapping of the EFI memory map using ioremap_cache(). This - * function should only be called once the vmalloc space has been - * setup and is therefore not suitable for calling during early EFI - * initialise, e.g. in efi_init(). Additionally, it expects - * efi_memmap_init_early() to have already been called. - * - * The reason there are two EFI memmap initialisation - * (efi_memmap_init_early() and this late version) is because the - * early EFI memmap should be explicitly unmapped once EFI - * initialisation is complete as the fixmap space used to map the EFI - * memmap (via early_memremap()) is a scarce resource. - * - * This late mapping is intended to persist for the duration of - * runtime so that things like efi_mem_desc_lookup() and - * efi_mem_attributes() always work. - * - * Returns zero on success, a negative error code on failure. - */ -int __init efi_memmap_init_late(phys_addr_t addr, unsigned long size) -{ - struct efi_memory_map_data data = { - .phys_map = addr, - .size = size, - }; - - /* Did we forget to unmap the early EFI memmap? */ - WARN_ON(efi.memmap.map); - - /* Were we already called? */ - WARN_ON(efi.memmap.late); - - /* - * It makes no sense to allow callers to register different - * values for the following fields. Copy them out of the - * existing early EFI memmap. - */ - data.desc_version = efi.memmap.desc_version; - data.desc_size = efi.memmap.desc_size; - - return __efi_memmap_init(&data, true); -} - #ifdef CONFIG_EFI_VARS_MODULE static int __init efi_load_efivars(void) { |