diff options
Diffstat (limited to 'arch/powerpc/include/asm/book3s/64/pgtable-64k.h')
| -rw-r--r-- | arch/powerpc/include/asm/book3s/64/pgtable-64k.h | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/book3s/64/pgtable-64k.h b/arch/powerpc/include/asm/book3s/64/pgtable-64k.h new file mode 100644 index 000000000000..cb2d0a5fa3f8 --- /dev/null +++ b/arch/powerpc/include/asm/book3s/64/pgtable-64k.h @@ -0,0 +1,64 @@ +#ifndef _ASM_POWERPC_BOOK3S_64_PGTABLE_64K_H +#define _ASM_POWERPC_BOOK3S_64_PGTABLE_64K_H + +#ifndef __ASSEMBLY__ +#ifdef CONFIG_HUGETLB_PAGE +/* + * We have PGD_INDEX_SIZ = 12 and PTE_INDEX_SIZE = 8, so that we can have + * 16GB hugepage pte in PGD and 16MB hugepage pte at PMD; + * + * Defined in such a way that we can optimize away code block at build time + * if CONFIG_HUGETLB_PAGE=n. + */ +static inline int pmd_huge(pmd_t pmd) +{ + /* + * leaf pte for huge page + */ + return !!(pmd_val(pmd) & _PAGE_PTE); +} + +static inline int pud_huge(pud_t pud) +{ + /* + * leaf pte for huge page + */ + return !!(pud_val(pud) & _PAGE_PTE); +} + +static inline int pgd_huge(pgd_t pgd) +{ + /* + * leaf pte for huge page + */ + return !!(pgd_val(pgd) & _PAGE_PTE); +} +#define pgd_huge pgd_huge + +#ifdef CONFIG_DEBUG_VM +extern int hugepd_ok(hugepd_t hpd); +#define is_hugepd(hpd) (hugepd_ok(hpd)) +#else +/* + * With 64k page size, we have hugepage ptes in the pgd and pmd entries. We don't + * need to setup hugepage directory for them. Our pte and page directory format + * enable us to have this enabled. + */ +static inline int hugepd_ok(hugepd_t hpd) +{ + return 0; +} +#define is_hugepd(pdep) 0 +#endif /* CONFIG_DEBUG_VM */ + +#endif /* CONFIG_HUGETLB_PAGE */ + +static inline int remap_4k_pfn(struct vm_area_struct *vma, unsigned long addr, + unsigned long pfn, pgprot_t prot) +{ + if (radix_enabled()) + BUG(); + return hash__remap_4k_pfn(vma, addr, pfn, prot); +} +#endif /* __ASSEMBLY__ */ +#endif /*_ASM_POWERPC_BOOK3S_64_PGTABLE_64K_H */ |