mirror of
https://github.com/torvalds/linux.git
synced 2024-12-28 22:02:28 +00:00
60305db988
Now that the create_mapping() code in mm/mmu.c is able to support setting up kernel page tables at initcall time, we can move the whole virtmap creation to arm64_enable_runtime_services() instead of having a distinct stage during early boot. This also allows us to drop the arm64-specific EFI_VIRTMAP flag. Signed-off-by: Ard Biesheuvel <ard.biesheuvel-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
#ifndef _ASM_EFI_H
|
|
#define _ASM_EFI_H
|
|
|
|
#include <asm/io.h>
|
|
#include <asm/neon.h>
|
|
|
|
#ifdef CONFIG_EFI
|
|
extern void efi_init(void);
|
|
#else
|
|
#define efi_init()
|
|
#endif
|
|
|
|
#define efi_call_virt(f, ...) \
|
|
({ \
|
|
efi_##f##_t *__f; \
|
|
efi_status_t __s; \
|
|
\
|
|
kernel_neon_begin(); \
|
|
efi_virtmap_load(); \
|
|
__f = efi.systab->runtime->f; \
|
|
__s = __f(__VA_ARGS__); \
|
|
efi_virtmap_unload(); \
|
|
kernel_neon_end(); \
|
|
__s; \
|
|
})
|
|
|
|
#define __efi_call_virt(f, ...) \
|
|
({ \
|
|
efi_##f##_t *__f; \
|
|
\
|
|
kernel_neon_begin(); \
|
|
efi_virtmap_load(); \
|
|
__f = efi.systab->runtime->f; \
|
|
__f(__VA_ARGS__); \
|
|
efi_virtmap_unload(); \
|
|
kernel_neon_end(); \
|
|
})
|
|
|
|
/* arch specific definitions used by the stub code */
|
|
|
|
/*
|
|
* AArch64 requires the DTB to be 8-byte aligned in the first 512MiB from
|
|
* start of kernel and may not cross a 2MiB boundary. We set alignment to
|
|
* 2MiB so we know it won't cross a 2MiB boundary.
|
|
*/
|
|
#define EFI_FDT_ALIGN SZ_2M /* used by allocate_new_fdt_and_exit_boot() */
|
|
#define MAX_FDT_OFFSET SZ_512M
|
|
|
|
#define efi_call_early(f, ...) sys_table_arg->boottime->f(__VA_ARGS__)
|
|
|
|
#define EFI_ALLOC_ALIGN SZ_64K
|
|
|
|
/*
|
|
* On ARM systems, virtually remapped UEFI runtime services are set up in two
|
|
* distinct stages:
|
|
* - The stub retrieves the final version of the memory map from UEFI, populates
|
|
* the virt_addr fields and calls the SetVirtualAddressMap() [SVAM] runtime
|
|
* service to communicate the new mapping to the firmware (Note that the new
|
|
* mapping is not live at this time)
|
|
* - During an early initcall(), the EFI system table is permanently remapped
|
|
* and the virtual remapping of the UEFI Runtime Services regions is loaded
|
|
* into a private set of page tables. If this all succeeds, the Runtime
|
|
* Services are enabled and the EFI_RUNTIME_SERVICES bit set.
|
|
*/
|
|
|
|
void efi_virtmap_load(void);
|
|
void efi_virtmap_unload(void);
|
|
|
|
#endif /* _ASM_EFI_H */
|