diff options
| -rw-r--r-- | arch/x86/platform/efi/efi.c | 30 | ||||
| -rw-r--r-- | drivers/firmware/efi/efi.c | 32 | ||||
| -rw-r--r-- | include/linux/efi.h | 1 |
3 files changed, 35 insertions, 28 deletions
diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c index ed2be58ea3f1..fbc1d70188f8 100644 --- a/arch/x86/platform/efi/efi.c +++ b/arch/x86/platform/efi/efi.c @@ -393,6 +393,8 @@ int __init efi_memblock_x86_reserve_range(void) memblock_reserve(pmap, memmap.nr_map * memmap.desc_size); + efi.memmap = &memmap; + return 0; } @@ -736,34 +738,6 @@ static void __init runtime_code_page_mkexec(void) } } -/* - * We can't ioremap data in EFI boot services RAM, because we've already mapped - * it as RAM. So, look it up in the existing EFI memory map instead. Only - * callable after efi_enter_virtual_mode and before efi_free_boot_services. - */ -void __iomem *efi_lookup_mapped_addr(u64 phys_addr) -{ - void *p; - if (WARN_ON(!memmap.map)) - return NULL; - for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { - efi_memory_desc_t *md = p; - u64 size = md->num_pages << EFI_PAGE_SHIFT; - u64 end = md->phys_addr + size; - if (!(md->attribute & EFI_MEMORY_RUNTIME) && - md->type != EFI_BOOT_SERVICES_CODE && - md->type != EFI_BOOT_SERVICES_DATA) - continue; - if (!md->virt_addr) - continue; - if (phys_addr >= md->phys_addr && phys_addr < end) { - phys_addr += md->virt_addr - md->phys_addr; - return (__force void __iomem *)(unsigned long)phys_addr; - } - } - return NULL; -} - void efi_memory_uc(u64 addr, unsigned long size) { unsigned long page_shift = 1UL << EFI_PAGE_SHIFT; diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c index e1010d450b65..2e2fbdec0845 100644 --- a/drivers/firmware/efi/efi.c +++ b/drivers/firmware/efi/efi.c @@ -150,6 +150,38 @@ err_put: subsys_initcall(efisubsys_init); +/* + * We can't ioremap data in EFI boot services RAM, because we've already mapped + * it as RAM. So, look it up in the existing EFI memory map instead. Only + * callable after efi_enter_virtual_mode and before efi_free_boot_services. + */ +void __iomem *efi_lookup_mapped_addr(u64 phys_addr) +{ + struct efi_memory_map *map; + void *p; + map = efi.memmap; + if (!map) + return NULL; + if (WARN_ON(!map->map)) + return NULL; + for (p = map->map; p < map->map_end; p += map->desc_size) { + efi_memory_desc_t *md = p; + u64 size = md->num_pages << EFI_PAGE_SHIFT; + u64 end = md->phys_addr + size; + if (!(md->attribute & EFI_MEMORY_RUNTIME) && + md->type != EFI_BOOT_SERVICES_CODE && + md->type != EFI_BOOT_SERVICES_DATA) + continue; + if (!md->virt_addr) + continue; + if (phys_addr >= md->phys_addr && phys_addr < end) { + phys_addr += md->virt_addr - md->phys_addr; + return (__force void __iomem *)(unsigned long)phys_addr; + } + } + return NULL; +} + static __initdata efi_config_table_type_t common_tables[] = { {ACPI_20_TABLE_GUID, "ACPI 2.0", &efi.acpi20}, {ACPI_TABLE_GUID, "ACPI", &efi.acpi}, diff --git a/include/linux/efi.h b/include/linux/efi.h index 09d9e4212799..c084b6d942c3 100644 --- a/include/linux/efi.h +++ b/include/linux/efi.h @@ -558,6 +558,7 @@ extern struct efi { efi_get_next_high_mono_count_t *get_next_high_mono_count; efi_reset_system_t *reset_system; efi_set_virtual_address_map_t *set_virtual_address_map; + struct efi_memory_map *memmap; } efi; static inline int |
