mirror of https://gitee.com/openkylin/linux.git
112 lines
3.2 KiB
C
112 lines
3.2 KiB
C
#ifndef _ASM_EFI_H
|
|
#define _ASM_EFI_H
|
|
|
|
#include <asm/cpufeature.h>
|
|
#include <asm/io.h>
|
|
#include <asm/mmu_context.h>
|
|
#include <asm/neon.h>
|
|
#include <asm/ptrace.h>
|
|
#include <asm/tlbflush.h>
|
|
|
|
#ifdef CONFIG_EFI
|
|
extern void efi_init(void);
|
|
#else
|
|
#define efi_init()
|
|
#endif
|
|
|
|
int efi_create_mapping(struct mm_struct *mm, efi_memory_desc_t *md);
|
|
int efi_set_mapping_permissions(struct mm_struct *mm, efi_memory_desc_t *md);
|
|
|
|
#define arch_efi_call_virt_setup() \
|
|
({ \
|
|
kernel_neon_begin(); \
|
|
efi_virtmap_load(); \
|
|
})
|
|
|
|
#define arch_efi_call_virt(p, f, args...) \
|
|
({ \
|
|
efi_##f##_t *__f; \
|
|
__f = p->f; \
|
|
__f(args); \
|
|
})
|
|
|
|
#define arch_efi_call_virt_teardown() \
|
|
({ \
|
|
efi_virtmap_unload(); \
|
|
kernel_neon_end(); \
|
|
})
|
|
|
|
#define ARCH_EFI_IRQ_FLAGS_MASK (PSR_D_BIT | PSR_A_BIT | PSR_I_BIT | PSR_F_BIT)
|
|
|
|
/* 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_call_early(f, ...) f(__VA_ARGS__)
|
|
#define efi_is_64bit() (true)
|
|
|
|
#define efi_call_proto(protocol, f, instance, ...) \
|
|
((protocol##_t *)instance)->f(instance, ##__VA_ARGS__)
|
|
|
|
#define alloc_screen_info(x...) &screen_info
|
|
#define free_screen_info(x...)
|
|
|
|
static inline void efifb_setup_from_dmi(struct screen_info *si, const char *opt)
|
|
{
|
|
}
|
|
|
|
#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.
|
|
*/
|
|
|
|
static inline void efi_set_pgd(struct mm_struct *mm)
|
|
{
|
|
__switch_mm(mm);
|
|
|
|
if (system_uses_ttbr0_pan()) {
|
|
if (mm != current->active_mm) {
|
|
/*
|
|
* Update the current thread's saved ttbr0 since it is
|
|
* restored as part of a return from exception. Set
|
|
* the hardware TTBR0_EL1 using cpu_switch_mm()
|
|
* directly to enable potential errata workarounds.
|
|
*/
|
|
update_saved_ttbr0(current, mm);
|
|
cpu_switch_mm(mm->pgd, mm);
|
|
} else {
|
|
/*
|
|
* Defer the switch to the current thread's TTBR0_EL1
|
|
* until uaccess_enable(). Restore the current
|
|
* thread's saved ttbr0 corresponding to its active_mm
|
|
* (if different from init_mm).
|
|
*/
|
|
cpu_set_reserved_ttbr0();
|
|
if (current->active_mm != &init_mm)
|
|
update_saved_ttbr0(current, current->active_mm);
|
|
}
|
|
}
|
|
}
|
|
|
|
void efi_virtmap_load(void);
|
|
void efi_virtmap_unload(void);
|
|
|
|
#endif /* _ASM_EFI_H */
|