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x86: page.h: make pte_t a union to always include 

Make sure pte_t, whatever its definition, has a pte element with type
pteval_t.  This allows common code to access it without needing to be
specifically parameterised on what pagetable mode we're compiling for.
For 32-bit, this means that pte_t becomes a union with "pte" and "{
pte_low, pte_high }" (PAE) or just "pte_low" (non-PAE).

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Jeremy Fitzhardinge 2008-01-30 13:32:57 +01:00 committed by Ingo Molnar
parent b7fff536d0
commit c8e5393ab3
10 changed files with 29 additions and 41 deletions
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4
arch/x86/xen/mmu.c
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@ -244,9 +244,7 @@ pte_t xen_make_pte(unsigned long long pte)
if (pte & 1)
pte = phys_to_machine(XPADDR(pte)).maddr;
pte &= ~_PAGE_PCD;
return (pte_t){ pte, pte >> 32 };
return (pte_t){ .pte = pte };
}
pmd_t xen_make_pmd(unsigned long long pmd)

10
include/asm-x86/page.h
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@ -108,6 +108,16 @@ static inline pmdval_t native_pmd_val(pmd_t pmd)
#include <asm-generic/pgtable-nopmd.h>
#endif /* PAGETABLE_LEVELS >= 3 */
static inline pte_t native_make_pte(pteval_t val)
{
return (pte_t) { .pte = val };
}
static inline pteval_t native_pte_val(pte_t pte)
{
return pte.pte;
}
#define pgprot_val(x) ((x).pgprot)
#define __pgprot(x) ((pgprot_t) { (x) } )

30
include/asm-x86/page_32.h
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@ -26,18 +26,12 @@ typedef u64 pgdval_t;
typedef u64 pgprotval_t;
typedef u64 phys_addr_t;
typedef struct { unsigned long pte_low, pte_high; } pte_t;
static inline unsigned long long native_pte_val(pte_t pte)
{
return pte.pte_low | ((unsigned long long)pte.pte_high << 32);
}
static inline pte_t native_make_pte(unsigned long long val)
{
return (pte_t) { .pte_low = val, .pte_high = (val >> 32) } ;
}
typedef union {
struct {
unsigned long pte_low, pte_high;
};
pteval_t pte;
} pte_t;
#endif /* __ASSEMBLY__
*/
#else /* !CONFIG_X86_PAE */
@ -53,19 +47,9 @@ typedef unsigned long pgdval_t;
typedef unsigned long pgprotval_t;
typedef unsigned long phys_addr_t;
typedef struct { pteval_t pte_low; } pte_t;
typedef union { pteval_t pte, pte_low; } pte_t;
typedef pte_t boot_pte_t;
static inline unsigned long native_pte_val(pte_t pte)
{
return pte.pte_low;
}
static inline pte_t native_make_pte(unsigned long val)
{
return (pte_t) { .pte_low = val };
}
#endif /* __ASSEMBLY__ */
#endif /* CONFIG_X86_PAE */

3
include/asm-x86/page_64.h
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@ -70,9 +70,6 @@ typedef unsigned long phys_addr_t;
typedef struct { pteval_t pte; } pte_t;
#define native_pte_val(x) ((x).pte)
#define native_make_pte(x) ((pte_t) { (x) } )
#define vmemmap ((struct page *)VMEMMAP_START)
#endif /* !__ASSEMBLY__ */

2
include/asm-x86/paravirt.h
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@ -922,7 +922,7 @@ static inline pte_t __pte(unsigned long long val)
unsigned long long ret = PVOP_CALL2(unsigned long long,
pv_mmu_ops.make_pte,
val, val >> 32);
return (pte_t) { ret, ret >> 32 };
return (pte_t) { .pte = ret };
}
static inline pmd_t __pmd(unsigned long long val)

4
include/asm-x86/pgtable-2level.h
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@ -72,13 +72,13 @@ static inline int pte_exec_kernel(pte_t pte)
((((pte).pte_low >> 1) & 0x1f ) + (((pte).pte_low >> 8) << 5 ))
#define pgoff_to_pte(off) \
((pte_t) { (((off) & 0x1f) << 1) + (((off) >> 5) << 8) + _PAGE_FILE })
((pte_t) { .pte_low = (((off) & 0x1f) << 1) + (((off) >> 5) << 8) + _PAGE_FILE })
/* Encode and de-code a swap entry */
#define __swp_type(x) (((x).val >> 1) & 0x1f)
#define __swp_offset(x) ((x).val >> 8)
#define __swp_entry(type, offset) ((swp_entry_t) { ((type) << 1) | ((offset) << 8) })
#define __pte_to_swp_entry(pte) ((swp_entry_t) { (pte).pte_low })
#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
#define __swp_entry_to_pte(x) ((pte_t) { .pte = (x).val })
#endif /* _I386_PGTABLE_2LEVEL_H */

4
include/asm-x86/pgtable-3level.h
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@ -163,7 +163,7 @@ static inline unsigned long pte_pfn(pte_t pte)
* put the 32 bits of offset into the high part.
*/
#define pte_to_pgoff(pte) ((pte).pte_high)
#define pgoff_to_pte(off) ((pte_t) { _PAGE_FILE, (off) })
#define pgoff_to_pte(off) ((pte_t) { { .pte_low = _PAGE_FILE, .pte_high = (off) } })
#define PTE_FILE_MAX_BITS 32
/* Encode and de-code a swap entry */
@ -171,7 +171,7 @@ static inline unsigned long pte_pfn(pte_t pte)
#define __swp_offset(x) ((x).val >> 5)
#define __swp_entry(type, offset) ((swp_entry_t){(type) | (offset) << 5})
#define __pte_to_swp_entry(pte) ((swp_entry_t){ (pte).pte_high })
#define __swp_entry_to_pte(x) ((pte_t){ 0, (x).val })
#define __swp_entry_to_pte(x) ((pte_t){ { .pte_high = (x).val } })
#define __pmd_free_tlb(tlb, x) do { } while (0)

6
include/asm-x86/pgtable_64.h
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@ -72,7 +72,7 @@ extern unsigned long empty_zero_page[PAGE_SIZE/sizeof(unsigned long)];
static inline void set_pte(pte_t *dst, pte_t val)
{
pte_val(*dst) = pte_val(val);
*dst = val;
}
#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
@ -222,7 +222,7 @@ static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr,
#define pmd_pfn(x) ((pmd_val(x) & __PHYSICAL_MASK) >> PAGE_SHIFT)
#define pte_to_pgoff(pte) ((pte_val(pte) & PHYSICAL_PAGE_MASK) >> PAGE_SHIFT)
#define pgoff_to_pte(off) ((pte_t) { ((off) << PAGE_SHIFT) | _PAGE_FILE })
#define pgoff_to_pte(off) ((pte_t) { .pte = ((off) << PAGE_SHIFT) | _PAGE_FILE })
#define PTE_FILE_MAX_BITS __PHYSICAL_MASK_SHIFT
/* PTE - Level 1 access. */
@ -264,7 +264,7 @@ static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr,
#define __swp_offset(x) ((x).val >> 8)
#define __swp_entry(type, offset) ((swp_entry_t) { ((type) << 1) | ((offset) << 8) })
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
#define __swp_entry_to_pte(x) ((pte_t) { .pte = (x).val })
extern spinlock_t pgd_lock;
extern struct list_head pgd_list;

1
include/asm-x86/processor.h
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@ -14,7 +14,6 @@ struct mm_struct;
#include <asm/vm86.h>
#include <asm/math_emu.h>
#include <asm/segment.h>
#include <asm/page.h>
#include <asm/types.h>
#include <asm/sigcontext.h>
#include <asm/current.h>

6
include/xen/page.h
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@ -156,16 +156,16 @@ static inline pte_t mfn_pte(unsigned long page_nr, pgprot_t pgprot)
static inline unsigned long long pte_val_ma(pte_t x)
{
return ((unsigned long long)x.pte_high << 32) | x.pte_low;
return x.pte;
}
#define pmd_val_ma(v) ((v).pmd)
#define pud_val_ma(v) ((v).pgd.pgd)
#define __pte_ma(x) ((pte_t) { .pte_low = (x), .pte_high = (x)>>32 } )
#define __pte_ma(x) ((pte_t) { .pte = (x) })
#define __pmd_ma(x) ((pmd_t) { (x) } )
#else /* !X86_PAE */
#define pte_mfn(_pte) ((_pte).pte_low >> PAGE_SHIFT)
#define mfn_pte(pfn, prot) __pte_ma(((pfn) << PAGE_SHIFT) | pgprot_val(prot))
#define pte_val_ma(x) ((x).pte_low)
#define pte_val_ma(x) ((x).pte)
#define pmd_val_ma(v) ((v).pud.pgd.pgd)
#define __pte_ma(x) ((pte_t) { (x) } )
#endif /* CONFIG_X86_PAE */