1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_POWERPC_NOHASH_32_HUGETLB_8XX_H
3 #define _ASM_POWERPC_NOHASH_32_HUGETLB_8XX_H
4 
5 #define PAGE_SHIFT_8M		23
6 
7 static inline pte_t *hugepd_page(hugepd_t hpd)
8 {
9 	BUG_ON(!hugepd_ok(hpd));
10 
11 	return (pte_t *)__va(hpd_val(hpd) & ~HUGEPD_SHIFT_MASK);
12 }
13 
14 static inline unsigned int hugepd_shift(hugepd_t hpd)
15 {
16 	return ((hpd_val(hpd) & _PMD_PAGE_MASK) >> 1) + 17;
17 }
18 
19 static inline pte_t *hugepte_offset(hugepd_t hpd, unsigned long addr,
20 				    unsigned int pdshift)
21 {
22 	unsigned long idx = (addr & ((1UL << pdshift) - 1)) >> PAGE_SHIFT;
23 
24 	return hugepd_page(hpd) + idx;
25 }
26 
27 static inline void flush_hugetlb_page(struct vm_area_struct *vma,
28 				      unsigned long vmaddr)
29 {
30 	flush_tlb_page(vma, vmaddr);
31 }
32 
33 static inline void hugepd_populate(hugepd_t *hpdp, pte_t *new, unsigned int pshift)
34 {
35 	*hpdp = __hugepd(__pa(new) | _PMD_USER | _PMD_PRESENT |
36 			 (pshift == PAGE_SHIFT_8M ? _PMD_PAGE_8M : _PMD_PAGE_512K));
37 }
38 
39 static inline int check_and_get_huge_psize(int shift)
40 {
41 	return shift_to_mmu_psize(shift);
42 }
43 
44 #endif /* _ASM_POWERPC_NOHASH_32_HUGETLB_8XX_H */
45