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powerpc/mm: Move hugetlb related headers

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W.r.t hugetlb, we support two format for pmd. With book3s_64 and
64K linux page size, we can have pte at the pmd level. Hence we
don't need to support hugepd there. For everything else hugepd
is supported and pmd_huge is (0).

Acked-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Aneesh Kumar K.V
2015-12-01 09:06:52 +05:30
committed by Michael Ellerman
parent 40e8550afc
commit 26a344aea4
6 changed files with 129 additions and 110 deletions
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42
arch/powerpc/include/asm/page.h
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@@ -387,45 +387,11 @@ typedef unsigned long pgprot_t;
typedef struct { signed long pd; } hugepd_t;
#ifdef CONFIG_HUGETLB_PAGE
#ifdef CONFIG_PPC_BOOK3S_64
#ifdef CONFIG_PPC_64K_PAGES
/*
* 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. But to avoid errors when implementing new
* features disable hugepd for 64K. We enable a debug version here, So we catch
* wrong usage.
*/
#ifdef CONFIG_DEBUG_VM
extern int hugepd_ok(hugepd_t hpd);
#else
#define hugepd_ok(x) (0)
#endif
#else
static inline int hugepd_ok(hugepd_t hpd)
{
/*
* hugepd pointer, bottom two bits == 00 and next 4 bits
* indicate size of table
*/
return (((hpd.pd & 0x3) == 0x0) && ((hpd.pd & HUGEPD_SHIFT_MASK) != 0));
}
#endif
#else
static inline int hugepd_ok(hugepd_t hpd)
{
return (hpd.pd > 0);
}
#endif
#define is_hugepd(hpd) (hugepd_ok(hpd))
#define pgd_huge pgd_huge
int pgd_huge(pgd_t pgd);
#else /* CONFIG_HUGETLB_PAGE */
#define is_hugepd(pdep) 0
#define pgd_huge(pgd) 0
#ifndef CONFIG_HUGETLB_PAGE
#define is_hugepd(pdep) (0)
#define pgd_huge(pgd) (0)
#endif /* CONFIG_HUGETLB_PAGE */
#define __hugepd(x) ((hugepd_t) { (x) })
struct page;