arch/powerpc/include/asm/book3s/64/hugetlb.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_POWERPC_BOOK3S_64_HUGETLB_H
   3 #define _ASM_POWERPC_BOOK3S_64_HUGETLB_H
   4 /*
   5  * For radix we want generic code to handle hugetlb. But then if we want
   6  * both hash and radix to be enabled together we need to workaround the
   7  * limitations.
   8  */
   9 void radix__flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
  10 void radix__local_flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
  11 extern unsigned long
  12 radix__hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
  13                                 unsigned long len, unsigned long pgoff,
  14                                 unsigned long flags);
  15
  16 static inline int hstate_get_psize(struct hstate *hstate)
  17 {
  18         unsigned long shift;
  19
  20         shift = huge_page_shift(hstate);
  21         if (shift == mmu_psize_defs[MMU_PAGE_2M].shift)
  22                 return MMU_PAGE_2M;
  23         else if (shift == mmu_psize_defs[MMU_PAGE_1G].shift)
  24                 return MMU_PAGE_1G;
  25         else if (shift == mmu_psize_defs[MMU_PAGE_16M].shift)
  26                 return MMU_PAGE_16M;
  27         else if (shift == mmu_psize_defs[MMU_PAGE_16G].shift)
  28                 return MMU_PAGE_16G;
  29         else {
  30                 WARN(1, "Wrong huge page shift\n");
  31                 return mmu_virtual_psize;
  32         }
  33 }
  34
  35 #ifdef CONFIG_ARCH_HAS_GIGANTIC_PAGE
  36 static inline bool gigantic_page_supported(void)
  37 {
  38         return true;
  39 }
  40 #endif
  41
  42 /* hugepd entry valid bit */
  43 #define HUGEPD_VAL_BITS         (0x8000000000000000UL)
  44
  45 #endif