1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_POWERPC_NOHASH_HUGETLB_E500_H
3 #define _ASM_POWERPC_NOHASH_HUGETLB_E500_H
4 
5 static inline pte_t *hugepd_page(hugepd_t hpd)
6 {
7 	if (WARN_ON(!hugepd_ok(hpd)))
8 		return NULL;
9 
10 	return (pte_t *)((hpd_val(hpd) & ~HUGEPD_SHIFT_MASK) | PD_HUGE);
11 }
12 
13 static inline unsigned int hugepd_shift(hugepd_t hpd)
14 {
15 	return hpd_val(hpd) & HUGEPD_SHIFT_MASK;
16 }
17 
18 static inline pte_t *hugepte_offset(hugepd_t hpd, unsigned long addr,
19 				    unsigned int pdshift)
20 {
21 	/*
22 	 * On FSL BookE, we have multiple higher-level table entries that
23 	 * point to the same hugepte.  Just use the first one since they're all
24 	 * identical.  So for that case, idx=0.
25 	 */
26 	return hugepd_page(hpd);
27 }
28 
29 void flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
30 
31 static inline void hugepd_populate(hugepd_t *hpdp, pte_t *new, unsigned int pshift)
32 {
33 	/* We use the old format for PPC_E500 */
34 	*hpdp = __hugepd(((unsigned long)new & ~PD_HUGE) | pshift);
35 }
36 
37 static inline int check_and_get_huge_psize(int shift)
38 {
39 	if (shift & 1)	/* Not a power of 4 */
40 		return -EINVAL;
41 
42 	return shift_to_mmu_psize(shift);
43 }
44 
45 #endif /* _ASM_POWERPC_NOHASH_HUGETLB_E500_H */
46