src/include/ipxe/efi/efi_uaccess.h

#ifndef _IPXE_EFI_UACCESS_H
#define _IPXE_EFI_UACCESS_H

/** @file
 *
 * iPXE user access API for EFI
 *
 * EFI runs with flat physical addressing, so the various mappings
 * between virtual addresses, I/O addresses and bus addresses are all
 * no-ops.
 */

FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );

#ifdef UACCESS_EFI
#define UACCESS_PREFIX_efi
#else
#define UACCESS_PREFIX_efi __efi_
#endif

/**
 * Convert physical address to user pointer
 *
 * @v phys_addr		Physical address
 * @ret userptr		User pointer
 */
static inline __always_inline userptr_t
UACCESS_INLINE ( efi, phys_to_user ) ( unsigned long phys_addr ) {
	return phys_addr;
}

/**
 * Convert user buffer to physical address
 *
 * @v userptr		User pointer
 * @v offset		Offset from user pointer
 * @ret phys_addr	Physical address
 */
static inline __always_inline unsigned long
UACCESS_INLINE ( efi, user_to_phys ) ( userptr_t userptr, off_t offset ) {
	return ( userptr + offset );
}

static inline __always_inline userptr_t
UACCESS_INLINE ( efi, virt_to_user ) ( volatile const void *addr ) {
	return trivial_virt_to_user ( addr );
}

static inline __always_inline void *
UACCESS_INLINE ( efi, user_to_virt ) ( userptr_t userptr, off_t offset ) {
	return trivial_user_to_virt ( userptr, offset );
}

static inline __always_inline userptr_t
UACCESS_INLINE ( efi, userptr_add ) ( userptr_t userptr, off_t offset ) {
	return trivial_userptr_add ( userptr, offset );
}

static inline __always_inline off_t
UACCESS_INLINE ( efi, userptr_sub ) ( userptr_t userptr,
				      userptr_t subtrahend ) {
	return trivial_userptr_sub ( userptr, subtrahend );
}

static inline __always_inline void
UACCESS_INLINE ( efi, memcpy_user ) ( userptr_t dest, off_t dest_off,
					userptr_t src, off_t src_off,
					size_t len ) {
	trivial_memcpy_user ( dest, dest_off, src, src_off, len );
}

static inline __always_inline void
UACCESS_INLINE ( efi, memmove_user ) ( userptr_t dest, off_t dest_off,
					 userptr_t src, off_t src_off,
					 size_t len ) {
	trivial_memmove_user ( dest, dest_off, src, src_off, len );
}

static inline __always_inline int
UACCESS_INLINE ( efi, memcmp_user ) ( userptr_t first, off_t first_off,
				      userptr_t second, off_t second_off,
				      size_t len ) {
	return trivial_memcmp_user ( first, first_off, second, second_off, len);
}

static inline __always_inline void
UACCESS_INLINE ( efi, memset_user ) ( userptr_t buffer, off_t offset,
					int c, size_t len ) {
	trivial_memset_user ( buffer, offset, c, len );
}

static inline __always_inline size_t
UACCESS_INLINE ( efi, strlen_user ) ( userptr_t buffer, off_t offset ) {
	return trivial_strlen_user ( buffer, offset );
}

static inline __always_inline off_t
UACCESS_INLINE ( efi, memchr_user ) ( userptr_t buffer, off_t offset,
					int c, size_t len ) {
	return trivial_memchr_user ( buffer, offset, c, len );
}

#endif /* _IPXE_EFI_UACCESS_H */