18197af22SChristophe Leroy /* SPDX-License-Identifier: GPL-2.0 */ 28197af22SChristophe Leroy #ifndef _ASM_POWERPC_NOHASH_32_HUGETLB_8XX_H 38197af22SChristophe Leroy #define _ASM_POWERPC_NOHASH_32_HUGETLB_8XX_H 48197af22SChristophe Leroy 55fb84fecSChristophe Leroy #define PAGE_SHIFT_8M 23 65fb84fecSChristophe Leroy 78197af22SChristophe Leroy static inline pte_t *hugepd_page(hugepd_t hpd) 88197af22SChristophe Leroy { 98197af22SChristophe Leroy BUG_ON(!hugepd_ok(hpd)); 108197af22SChristophe Leroy 118197af22SChristophe Leroy return (pte_t *)__va(hpd_val(hpd) & ~HUGEPD_SHIFT_MASK); 128197af22SChristophe Leroy } 138197af22SChristophe Leroy 148197af22SChristophe Leroy static inline unsigned int hugepd_shift(hugepd_t hpd) 158197af22SChristophe Leroy { 168197af22SChristophe Leroy return ((hpd_val(hpd) & _PMD_PAGE_MASK) >> 1) + 17; 178197af22SChristophe Leroy } 188197af22SChristophe Leroy 198197af22SChristophe Leroy static inline pte_t *hugepte_offset(hugepd_t hpd, unsigned long addr, 208197af22SChristophe Leroy unsigned int pdshift) 218197af22SChristophe Leroy { 228197af22SChristophe Leroy unsigned long idx = (addr & ((1UL << pdshift) - 1)) >> PAGE_SHIFT; 238197af22SChristophe Leroy 248197af22SChristophe Leroy return hugepd_page(hpd) + idx; 258197af22SChristophe Leroy } 268197af22SChristophe Leroy 278197af22SChristophe Leroy static inline void flush_hugetlb_page(struct vm_area_struct *vma, 288197af22SChristophe Leroy unsigned long vmaddr) 298197af22SChristophe Leroy { 308197af22SChristophe Leroy flush_tlb_page(vma, vmaddr); 318197af22SChristophe Leroy } 328197af22SChristophe Leroy 335fb84fecSChristophe Leroy static inline void hugepd_populate(hugepd_t *hpdp, pte_t *new, unsigned int pshift) 345fb84fecSChristophe Leroy { 355fb84fecSChristophe Leroy *hpdp = __hugepd(__pa(new) | _PMD_USER | _PMD_PRESENT | 365fb84fecSChristophe Leroy (pshift == PAGE_SHIFT_8M ? _PMD_PAGE_8M : _PMD_PAGE_512K)); 375fb84fecSChristophe Leroy } 385fb84fecSChristophe Leroy 39723f268fSChristophe Leroy static inline int check_and_get_huge_psize(int shift) 40723f268fSChristophe Leroy { 41723f268fSChristophe Leroy return shift_to_mmu_psize(shift); 42723f268fSChristophe Leroy } 43723f268fSChristophe Leroy 448197af22SChristophe Leroy #endif /* _ASM_POWERPC_NOHASH_32_HUGETLB_8XX_H */ 45