drivers/firmware/efi/libstub/efistub.h

   1
   2 #ifndef _DRIVERS_FIRMWARE_EFI_EFISTUB_H
   3 #define _DRIVERS_FIRMWARE_EFI_EFISTUB_H
   4
   5 /* error code which can't be mistaken for valid address */
   6 #define EFI_ERROR       (~0UL)
   7
   8 /*
   9  * __init annotations should not be used in the EFI stub, since the code is
  10  * either included in the decompressor (x86, ARM) where they have no effect,
  11  * or the whole stub is __init annotated at the section level (arm64), by
  12  * renaming the sections, in which case the __init annotation will be
  13  * redundant, and will result in section names like .init.init.text, and our
  14  * linker script does not expect that.
  15  */
  16 #undef __init
  17
  18 /*
  19  * Allow the platform to override the allocation granularity: this allows
  20  * systems that have the capability to run with a larger page size to deal
  21  * with the allocations for initrd and fdt more efficiently.
  22  */
  23 #ifndef EFI_ALLOC_ALIGN
  24 #define EFI_ALLOC_ALIGN         EFI_PAGE_SIZE
  25 #endif
  26
  27 void efi_char16_printk(efi_system_table_t *, efi_char16_t *);
  28
  29 efi_status_t efi_open_volume(efi_system_table_t *sys_table_arg, void *__image,
  30                              void **__fh);
  31
  32 efi_status_t efi_file_size(efi_system_table_t *sys_table_arg, void *__fh,
  33                            efi_char16_t *filename_16, void **handle,
  34                            u64 *file_sz);
  35
  36 efi_status_t efi_file_read(void *handle, unsigned long *size, void *addr);
  37
  38 efi_status_t efi_file_close(void *handle);
  39
  40 unsigned long get_dram_base(efi_system_table_t *sys_table_arg);
  41
  42 efi_status_t update_fdt(efi_system_table_t *sys_table, void *orig_fdt,
  43                         unsigned long orig_fdt_size,
  44                         void *fdt, int new_fdt_size, char *cmdline_ptr,
  45                         u64 initrd_addr, u64 initrd_size,
  46                         efi_memory_desc_t *memory_map,
  47                         unsigned long map_size, unsigned long desc_size,
  48                         u32 desc_ver);
  49
  50 efi_status_t allocate_new_fdt_and_exit_boot(efi_system_table_t *sys_table,
  51                                             void *handle,
  52                                             unsigned long *new_fdt_addr,
  53                                             unsigned long max_addr,
  54                                             u64 initrd_addr, u64 initrd_size,
  55                                             char *cmdline_ptr,
  56                                             unsigned long fdt_addr,
  57                                             unsigned long fdt_size);
  58
  59 void *get_fdt(efi_system_table_t *sys_table, unsigned long *fdt_size);
  60
  61 void efi_get_virtmap(efi_memory_desc_t *memory_map, unsigned long map_size,
  62                      unsigned long desc_size, efi_memory_desc_t *runtime_map,
  63                      int *count);
  64
  65 efi_status_t efi_get_random_bytes(efi_system_table_t *sys_table,
  66                                   unsigned long size, u8 *out);
  67
  68 efi_status_t efi_random_alloc(efi_system_table_t *sys_table_arg,
  69                               unsigned long size, unsigned long align,
  70                               unsigned long *addr, unsigned long random_seed);
  71
  72 efi_status_t check_platform_features(efi_system_table_t *sys_table_arg);
  73
  74 efi_status_t efi_random_get_seed(efi_system_table_t *sys_table_arg);
  75
  76 #endif