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) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * arch/sh/mm/hugetlbpage.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * SuperH HugeTLB page support.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  * Cloned from sparc64 by Paul Mundt.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  * Copyright (C) 2002, 2003 David S. Miller (davem@redhat.com)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/hugetlb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/pagemap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/sysctl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <asm/mman.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <asm/tlb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <asm/tlbflush.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <asm/cacheflush.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) pte_t *huge_pte_alloc(struct mm_struct *mm, struct vm_area_struct *vma,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 			unsigned long addr, unsigned long sz)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	pgd_t *pgd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	p4d_t *p4d;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	pud_t *pud;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	pmd_t *pmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	pte_t *pte = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	pgd = pgd_offset(mm, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	if (pgd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 		p4d = p4d_alloc(mm, pgd, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 		if (p4d) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 			pud = pud_alloc(mm, p4d, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 			if (pud) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 				pmd = pmd_alloc(mm, pud, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 				if (pmd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 					pte = pte_alloc_map(mm, pmd, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	return pte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) pte_t *huge_pte_offset(struct mm_struct *mm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 		       unsigned long addr, unsigned long sz)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	pgd_t *pgd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	p4d_t *p4d;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	pud_t *pud;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	pmd_t *pmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 	pte_t *pte = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 	pgd = pgd_offset(mm, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 	if (pgd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 		p4d = p4d_offset(pgd, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 		if (p4d) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 			pud = pud_offset(p4d, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 			if (pud) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 				pmd = pmd_offset(pud, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 				if (pmd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 					pte = pte_offset_map(pmd, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 	return pte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) int pmd_huge(pmd_t pmd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) int pud_huge(pud_t pud)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) }