Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) #ifndef _PGTABLE_NOP4D_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) #define _PGTABLE_NOP4D_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #ifndef __ASSEMBLY__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #define __PAGETABLE_P4D_FOLDED 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) typedef struct { pgd_t pgd; } p4d_t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #define P4D_SHIFT		PGDIR_SHIFT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #define MAX_PTRS_PER_P4D	1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #define PTRS_PER_P4D		1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #define P4D_SIZE		(1UL << P4D_SHIFT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #define P4D_MASK		(~(P4D_SIZE-1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)  * The "pgd_xxx()" functions here are trivial for a folded two-level
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)  * setup: the p4d is never bad, and a p4d always exists (as it's folded
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)  * into the pgd entry)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) static inline int pgd_none(pgd_t pgd)		{ return 0; }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) static inline int pgd_bad(pgd_t pgd)		{ return 0; }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) static inline int pgd_present(pgd_t pgd)	{ return 1; }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) static inline void pgd_clear(pgd_t *pgd)	{ }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define p4d_ERROR(p4d)				(pgd_ERROR((p4d).pgd))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define pgd_populate(mm, pgd, p4d)		do { } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define pgd_populate_safe(mm, pgd, p4d)		do { } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)  * (p4ds are folded into pgds so this doesn't get actually called,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)  * but the define is needed for a generic inline function.)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #define set_pgd(pgdptr, pgdval)	set_p4d((p4d_t *)(pgdptr), (p4d_t) { pgdval })
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) static inline p4d_t *p4d_offset(pgd_t *pgd, unsigned long address)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	return (p4d_t *)pgd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #define p4d_val(x)				(pgd_val((x).pgd))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #define __p4d(x)				((p4d_t) { __pgd(x) })
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #define pgd_page(pgd)				(p4d_page((p4d_t){ pgd }))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #define pgd_page_vaddr(pgd)			(p4d_page_vaddr((p4d_t){ pgd }))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)  * allocating and freeing a p4d is trivial: the 1-entry p4d is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)  * inside the pgd, so has no extra memory associated with it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #define p4d_alloc_one(mm, address)		NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #define p4d_free(mm, x)				do { } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #define p4d_free_tlb(tlb, x, a)			do { } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #undef  p4d_addr_end
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #define p4d_addr_end(addr, end)			(end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #endif /* __ASSEMBLY__ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) #endif /* _PGTABLE_NOP4D_H */