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