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Diffstat (limited to '')
-rw-r--r-- | arch/powerpc/include/asm/nohash/32/hugetlb-8xx.h | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/nohash/32/hugetlb-8xx.h b/arch/powerpc/include/asm/nohash/32/hugetlb-8xx.h new file mode 100644 index 000000000..de092b04e --- /dev/null +++ b/arch/powerpc/include/asm/nohash/32/hugetlb-8xx.h @@ -0,0 +1,81 @@ +/* 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); +} + +#ifdef CONFIG_PPC_4K_PAGES +static inline pte_t arch_make_huge_pte(pte_t entry, unsigned int shift, vm_flags_t flags) +{ + size_t size = 1UL << shift; + + if (size == SZ_16K) + return __pte(pte_val(entry) | _PAGE_SPS); + else + return __pte(pte_val(entry) | _PAGE_SPS | _PAGE_HUGE); +} +#define arch_make_huge_pte arch_make_huge_pte +#endif + +#endif /* _ASM_POWERPC_NOHASH_32_HUGETLB_8XX_H */ |