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author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2016-03-16 02:54:45 +0300 |
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committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2016-03-16 02:54:45 +0300 |
commit | 245f0db0de926601353776085e6f6a4c974c5615 (patch) | |
tree | b493e9e726f4a898041f7861d0df328aa1a348a1 /arch/powerpc/include/asm/pte-hash64-64k.h | |
parent | 24672bdfb357b91bed0ea8d432241bf7bdefc8a8 (diff) | |
parent | b562e44f507e863c6792946e4e1b1449fbbac85d (diff) | |
download | linux-245f0db0de926601353776085e6f6a4c974c5615.tar.xz |
Merge tag 'v4.5' into next
Merge with Linux 4.5 to get PROPERTY_ENTRY_INTEGER() that is needed to
fix pxa/raumfeld rotary encoder properties.
Diffstat (limited to 'arch/powerpc/include/asm/pte-hash64-64k.h')
-rw-r--r-- | arch/powerpc/include/asm/pte-hash64-64k.h | 102 |
1 files changed, 0 insertions, 102 deletions
diff --git a/arch/powerpc/include/asm/pte-hash64-64k.h b/arch/powerpc/include/asm/pte-hash64-64k.h deleted file mode 100644 index 4f4ec2ab45c9..000000000000 --- a/arch/powerpc/include/asm/pte-hash64-64k.h +++ /dev/null @@ -1,102 +0,0 @@ -/* To be include by pgtable-hash64.h only */ - -/* Additional PTE bits (don't change without checking asm in hash_low.S) */ -#define _PAGE_SPECIAL 0x00000400 /* software: special page */ -#define _PAGE_HPTE_SUB 0x0ffff000 /* combo only: sub pages HPTE bits */ -#define _PAGE_HPTE_SUB0 0x08000000 /* combo only: first sub page */ -#define _PAGE_COMBO 0x10000000 /* this is a combo 4k page */ -#define _PAGE_4K_PFN 0x20000000 /* PFN is for a single 4k page */ - -/* For 64K page, we don't have a separate _PAGE_HASHPTE bit. Instead, - * we set that to be the whole sub-bits mask. The C code will only - * test this, so a multi-bit mask will work. For combo pages, this - * is equivalent as effectively, the old _PAGE_HASHPTE was an OR of - * all the sub bits. For real 64k pages, we now have the assembly set - * _PAGE_HPTE_SUB0 in addition to setting the HIDX bits which overlap - * that mask. This is fine as long as the HIDX bits are never set on - * a PTE that isn't hashed, which is the case today. - * - * A little nit is for the huge page C code, which does the hashing - * in C, we need to provide which bit to use. - */ -#define _PAGE_HASHPTE _PAGE_HPTE_SUB - -/* Note the full page bits must be in the same location as for normal - * 4k pages as the same assembly will be used to insert 64K pages - * whether the kernel has CONFIG_PPC_64K_PAGES or not - */ -#define _PAGE_F_SECOND 0x00008000 /* full page: hidx bits */ -#define _PAGE_F_GIX 0x00007000 /* full page: hidx bits */ - -/* PTE flags to conserve for HPTE identification */ -#define _PAGE_HPTEFLAGS (_PAGE_BUSY | _PAGE_HASHPTE | _PAGE_COMBO) - -/* Shift to put page number into pte. - * - * That gives us a max RPN of 34 bits, which means a max of 50 bits - * of addressable physical space, or 46 bits for the special 4k PFNs. - */ -#define PTE_RPN_SHIFT (30) - -#ifndef __ASSEMBLY__ - -/* - * With 64K pages on hash table, we have a special PTE format that - * uses a second "half" of the page table to encode sub-page information - * in order to deal with 64K made of 4K HW pages. Thus we override the - * generic accessors and iterators here - */ -#define __real_pte __real_pte -static inline real_pte_t __real_pte(pte_t pte, pte_t *ptep) -{ - real_pte_t rpte; - - rpte.pte = pte; - rpte.hidx = 0; - if (pte_val(pte) & _PAGE_COMBO) { - /* - * Make sure we order the hidx load against the _PAGE_COMBO - * check. The store side ordering is done in __hash_page_4K - */ - smp_rmb(); - rpte.hidx = pte_val(*((ptep) + PTRS_PER_PTE)); - } - return rpte; -} - -static inline unsigned long __rpte_to_hidx(real_pte_t rpte, unsigned long index) -{ - if ((pte_val(rpte.pte) & _PAGE_COMBO)) - return (rpte.hidx >> (index<<2)) & 0xf; - return (pte_val(rpte.pte) >> 12) & 0xf; -} - -#define __rpte_to_pte(r) ((r).pte) -#define __rpte_sub_valid(rpte, index) \ - (pte_val(rpte.pte) & (_PAGE_HPTE_SUB0 >> (index))) - -/* Trick: we set __end to va + 64k, which happens works for - * a 16M page as well as we want only one iteration - */ -#define pte_iterate_hashed_subpages(rpte, psize, vpn, index, shift) \ - do { \ - unsigned long __end = vpn + (1UL << (PAGE_SHIFT - VPN_SHIFT)); \ - unsigned __split = (psize == MMU_PAGE_4K || \ - psize == MMU_PAGE_64K_AP); \ - shift = mmu_psize_defs[psize].shift; \ - for (index = 0; vpn < __end; index++, \ - vpn += (1L << (shift - VPN_SHIFT))) { \ - if (!__split || __rpte_sub_valid(rpte, index)) \ - do { - -#define pte_iterate_hashed_end() } while(0); } } while(0) - -#define pte_pagesize_index(mm, addr, pte) \ - (((pte) & _PAGE_COMBO)? MMU_PAGE_4K: MMU_PAGE_64K) - -#define remap_4k_pfn(vma, addr, pfn, prot) \ - (WARN_ON(((pfn) >= (1UL << (64 - PTE_RPN_SHIFT)))) ? -EINVAL : \ - remap_pfn_range((vma), (addr), (pfn), PAGE_SIZE, \ - __pgprot(pgprot_val((prot)) | _PAGE_4K_PFN))) - -#endif /* __ASSEMBLY__ */ |