hugetlb-8xx.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef _ASM_POWERPC_NOHASH_32_HUGETLB_8XX_H
 3#define _ASM_POWERPC_NOHASH_32_HUGETLB_8XX_H
 4
 5#define PAGE_SHIFT_8M		23
 6
 7static inline void flush_hugetlb_page(struct vm_area_struct *vma,
 8				      unsigned long vmaddr)
 9{
10	flush_tlb_page(vma, vmaddr);
11}
12
13static inline int check_and_get_huge_psize(int shift)
14{
15	return shift_to_mmu_psize(shift);
16}
17
18#define __HAVE_ARCH_HUGE_SET_HUGE_PTE_AT
19void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep,
20		     pte_t pte, unsigned long sz);
21
22#define __HAVE_ARCH_HUGE_PTEP_GET
23static inline pte_t huge_ptep_get(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
24{
25	if (ptep_is_8m_pmdp(mm, addr, ptep))
26		ptep = pte_offset_kernel((pmd_t *)ptep, ALIGN_DOWN(addr, SZ_8M));
27	return ptep_get(ptep);
28}
29
30#define __HAVE_ARCH_HUGE_PTE_CLEAR
31static inline void huge_pte_clear(struct mm_struct *mm, unsigned long addr,
32				  pte_t *ptep, unsigned long sz)
33{
34	pte_update(mm, addr, ptep, ~0UL, 0, 1);
35}
36
37#define __HAVE_ARCH_HUGE_PTEP_SET_WRPROTECT
38static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
39					   unsigned long addr, pte_t *ptep)
40{
41	unsigned long clr = ~pte_val(pte_wrprotect(__pte(~0)));
42	unsigned long set = pte_val(pte_wrprotect(__pte(0)));
43
44	pte_update(mm, addr, ptep, clr, set, 1);
45}
46
47#ifdef CONFIG_PPC_4K_PAGES
48static inline pte_t arch_make_huge_pte(pte_t entry, unsigned int shift, vm_flags_t flags)
49{
50	size_t size = 1UL << shift;
51
52	if (size == SZ_16K)
53		return __pte(pte_val(entry) | _PAGE_SPS);
54	else
55		return __pte(pte_val(entry) | _PAGE_SPS | _PAGE_HUGE);
56}
57#define arch_make_huge_pte arch_make_huge_pte
58#endif
59
60#endif /* _ASM_POWERPC_NOHASH_32_HUGETLB_8XX_H */