blob: 8e88a696c9cbcbd2c8f717ea1c929b87750f1b03 [file] [log] [blame]
Mark Salterf84d0272014-04-15 21:59:30 -04001#ifndef _ASM_EFI_H
2#define _ASM_EFI_H
3
4#include <asm/io.h>
Ard Biesheuvelf7d92482015-11-30 13:28:19 +01005#include <asm/mmu_context.h>
Ard Biesheuvele15dd492014-07-04 19:41:53 +02006#include <asm/neon.h>
Ard Biesheuvelf7d92482015-11-30 13:28:19 +01007#include <asm/tlbflush.h>
Mark Salterf84d0272014-04-15 21:59:30 -04008
9#ifdef CONFIG_EFI
10extern void efi_init(void);
Mark Salterf84d0272014-04-15 21:59:30 -040011#else
12#define efi_init()
Mark Salterf84d0272014-04-15 21:59:30 -040013#endif
14
Ard Biesheuvelf7d92482015-11-30 13:28:19 +010015int efi_create_mapping(struct mm_struct *mm, efi_memory_desc_t *md);
16
Ard Biesheuvele15dd492014-07-04 19:41:53 +020017#define efi_call_virt(f, ...) \
18({ \
Ard Biesheuvelf3cdfd22014-10-20 16:27:26 +020019 efi_##f##_t *__f; \
Ard Biesheuvele15dd492014-07-04 19:41:53 +020020 efi_status_t __s; \
21 \
22 kernel_neon_begin(); \
Ard Biesheuvelf3cdfd22014-10-20 16:27:26 +020023 efi_virtmap_load(); \
24 __f = efi.systab->runtime->f; \
Ard Biesheuvele15dd492014-07-04 19:41:53 +020025 __s = __f(__VA_ARGS__); \
Ard Biesheuvelf3cdfd22014-10-20 16:27:26 +020026 efi_virtmap_unload(); \
Ard Biesheuvele15dd492014-07-04 19:41:53 +020027 kernel_neon_end(); \
28 __s; \
29})
30
31#define __efi_call_virt(f, ...) \
32({ \
Ard Biesheuvelf3cdfd22014-10-20 16:27:26 +020033 efi_##f##_t *__f; \
Ard Biesheuvele15dd492014-07-04 19:41:53 +020034 \
35 kernel_neon_begin(); \
Ard Biesheuvelf3cdfd22014-10-20 16:27:26 +020036 efi_virtmap_load(); \
37 __f = efi.systab->runtime->f; \
Ard Biesheuvele15dd492014-07-04 19:41:53 +020038 __f(__VA_ARGS__); \
Ard Biesheuvelf3cdfd22014-10-20 16:27:26 +020039 efi_virtmap_unload(); \
Ard Biesheuvele15dd492014-07-04 19:41:53 +020040 kernel_neon_end(); \
41})
42
Ard Biesheuvela13b0072014-07-02 14:54:41 +020043/* arch specific definitions used by the stub code */
44
45/*
46 * AArch64 requires the DTB to be 8-byte aligned in the first 512MiB from
47 * start of kernel and may not cross a 2MiB boundary. We set alignment to
48 * 2MiB so we know it won't cross a 2MiB boundary.
49 */
50#define EFI_FDT_ALIGN SZ_2M /* used by allocate_new_fdt_and_exit_boot() */
51#define MAX_FDT_OFFSET SZ_512M
52
53#define efi_call_early(f, ...) sys_table_arg->boottime->f(__VA_ARGS__)
54
Ard Biesheuvel1bd0abb2014-11-17 13:50:21 +010055#define EFI_ALLOC_ALIGN SZ_64K
56
Ard Biesheuvelf3cdfd22014-10-20 16:27:26 +020057/*
Ard Biesheuvel60305db92015-01-22 10:01:40 +000058 * On ARM systems, virtually remapped UEFI runtime services are set up in two
Ard Biesheuvelf3cdfd22014-10-20 16:27:26 +020059 * distinct stages:
60 * - The stub retrieves the final version of the memory map from UEFI, populates
61 * the virt_addr fields and calls the SetVirtualAddressMap() [SVAM] runtime
62 * service to communicate the new mapping to the firmware (Note that the new
63 * mapping is not live at this time)
Ard Biesheuvel60305db92015-01-22 10:01:40 +000064 * - During an early initcall(), the EFI system table is permanently remapped
65 * and the virtual remapping of the UEFI Runtime Services regions is loaded
66 * into a private set of page tables. If this all succeeds, the Runtime
67 * Services are enabled and the EFI_RUNTIME_SERVICES bit set.
Ard Biesheuvelf3cdfd22014-10-20 16:27:26 +020068 */
Ard Biesheuvelf3cdfd22014-10-20 16:27:26 +020069
Ard Biesheuvelf7d92482015-11-30 13:28:19 +010070static inline void efi_set_pgd(struct mm_struct *mm)
71{
72 switch_mm(NULL, mm, NULL);
73}
74
Ard Biesheuvelf3cdfd22014-10-20 16:27:26 +020075void efi_virtmap_load(void);
76void efi_virtmap_unload(void);
77
Mark Salterf84d0272014-04-15 21:59:30 -040078#endif /* _ASM_EFI_H */