| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef _ASM_POWERPC_NOHASH_32_HUGETLB_8XX_H |
| #define _ASM_POWERPC_NOHASH_32_HUGETLB_8XX_H |
| |
| #define PAGE_SHIFT_8M 23 |
| |
| static inline pte_t *hugepd_page(hugepd_t hpd) |
| { |
| BUG_ON(!hugepd_ok(hpd)); |
| |
| return (pte_t *)__va(hpd_val(hpd) & ~HUGEPD_SHIFT_MASK); |
| } |
| |
| static inline unsigned int hugepd_shift(hugepd_t hpd) |
| { |
| return PAGE_SHIFT_8M; |
| } |
| |
| static inline pte_t *hugepte_offset(hugepd_t hpd, unsigned long addr, |
| unsigned int pdshift) |
| { |
| unsigned long idx = (addr & (SZ_4M - 1)) >> PAGE_SHIFT; |
| |
| return hugepd_page(hpd) + idx; |
| } |
| |
| static inline void flush_hugetlb_page(struct vm_area_struct *vma, |
| unsigned long vmaddr) |
| { |
| flush_tlb_page(vma, vmaddr); |
| } |
| |
| static inline void hugepd_populate(hugepd_t *hpdp, pte_t *new, unsigned int pshift) |
| { |
| *hpdp = __hugepd(__pa(new) | _PMD_USER | _PMD_PRESENT | _PMD_PAGE_8M); |
| } |
| |
| static inline void hugepd_populate_kernel(hugepd_t *hpdp, pte_t *new, unsigned int pshift) |
| { |
| *hpdp = __hugepd(__pa(new) | _PMD_PRESENT | _PMD_PAGE_8M); |
| } |
| |
| static inline int check_and_get_huge_psize(int shift) |
| { |
| return shift_to_mmu_psize(shift); |
| } |
| |
| #define __HAVE_ARCH_HUGE_SET_HUGE_PTE_AT |
| void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte); |
| |
| #define __HAVE_ARCH_HUGE_PTE_CLEAR |
| static inline void huge_pte_clear(struct mm_struct *mm, unsigned long addr, |
| pte_t *ptep, unsigned long sz) |
| { |
| pte_update(mm, addr, ptep, ~0UL, 0, 1); |
| } |
| |
| #define __HAVE_ARCH_HUGE_PTEP_SET_WRPROTECT |
| static inline void huge_ptep_set_wrprotect(struct mm_struct *mm, |
| unsigned long addr, pte_t *ptep) |
| { |
| unsigned long clr = ~pte_val(pte_wrprotect(__pte(~0))); |
| unsigned long set = pte_val(pte_wrprotect(__pte(0))); |
| |
| pte_update(mm, addr, ptep, clr, set, 1); |
| } |
| |
| #endif /* _ASM_POWERPC_NOHASH_32_HUGETLB_8XX_H */ |
