345b904c3f
# HG changeset patch # User Jeremy Fitzhardinge <jeremy@xensource.com> # Date 1199317362 28800 # Node ID 4d9a413a0f4c1d98dbea704f0366457b5117045d # Parent ba0ec40a50a7aef1a3153cea124c35e261f5a2df x86: page.h: unify page copying and clearing Move, and to some extent unify, the various page copying and clearing functions. The only unification here is that both architectures use the same function for copying/clearing user and kernel pages. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
134 lines
3.2 KiB
C
134 lines
3.2 KiB
C
#ifndef _I386_PAGE_H
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#define _I386_PAGE_H
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#ifdef __KERNEL__
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#ifndef __ASSEMBLY__
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/*
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* These are used to make use of C type-checking..
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*/
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extern int nx_enabled;
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#ifdef CONFIG_X86_PAE
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typedef struct { unsigned long pte_low, pte_high; } pte_t;
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typedef struct { unsigned long long pmd; } pmd_t;
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typedef struct { unsigned long long pgd; } pgd_t;
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typedef struct { unsigned long long pgprot; } pgprot_t;
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static inline unsigned long long native_pgd_val(pgd_t pgd)
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{
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return pgd.pgd;
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}
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static inline unsigned long long native_pmd_val(pmd_t pmd)
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{
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return pmd.pmd;
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}
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static inline unsigned long long native_pte_val(pte_t pte)
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{
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return pte.pte_low | ((unsigned long long)pte.pte_high << 32);
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}
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static inline pgd_t native_make_pgd(unsigned long long val)
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{
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return (pgd_t) { val };
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}
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static inline pmd_t native_make_pmd(unsigned long long val)
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{
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return (pmd_t) { val };
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}
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static inline pte_t native_make_pte(unsigned long long val)
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{
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return (pte_t) { .pte_low = val, .pte_high = (val >> 32) } ;
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}
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#ifndef CONFIG_PARAVIRT
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#define pmd_val(x) native_pmd_val(x)
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#define __pmd(x) native_make_pmd(x)
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#endif
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#include <asm-generic/pgtable-nopud.h>
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#else /* !CONFIG_X86_PAE */
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typedef struct { unsigned long pte_low; } pte_t;
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typedef struct { unsigned long pgd; } pgd_t;
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typedef struct { unsigned long pgprot; } pgprot_t;
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#define boot_pte_t pte_t /* or would you rather have a typedef */
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static inline unsigned long native_pgd_val(pgd_t pgd)
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{
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return pgd.pgd;
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}
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static inline unsigned long native_pte_val(pte_t pte)
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{
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return pte.pte_low;
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}
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static inline pgd_t native_make_pgd(unsigned long val)
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{
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return (pgd_t) { val };
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}
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static inline pte_t native_make_pte(unsigned long val)
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{
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return (pte_t) { .pte_low = val };
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}
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#include <asm-generic/pgtable-nopmd.h>
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#endif /* CONFIG_X86_PAE */
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#define PTE_MASK PAGE_MASK
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#define pgprot_val(x) ((x).pgprot)
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#define __pgprot(x) ((pgprot_t) { (x) } )
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#ifndef CONFIG_PARAVIRT
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#define pgd_val(x) native_pgd_val(x)
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#define __pgd(x) native_make_pgd(x)
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#define pte_val(x) native_pte_val(x)
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#define __pte(x) native_make_pte(x)
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#endif
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#endif /* !__ASSEMBLY__ */
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#ifndef __ASSEMBLY__
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struct vm_area_struct;
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/*
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* This much address space is reserved for vmalloc() and iomap()
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* as well as fixmap mappings.
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*/
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extern unsigned int __VMALLOC_RESERVE;
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extern int sysctl_legacy_va_layout;
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extern int page_is_ram(unsigned long pagenr);
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#endif /* __ASSEMBLY__ */
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#define VMALLOC_RESERVE ((unsigned long)__VMALLOC_RESERVE)
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#define MAXMEM (-__PAGE_OFFSET-__VMALLOC_RESERVE)
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#define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
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/* __pa_symbol should be used for C visible symbols.
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This seems to be the official gcc blessed way to do such arithmetic. */
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#define __pa_symbol(x) __pa(RELOC_HIDE((unsigned long)(x),0))
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#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
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#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
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#ifdef CONFIG_FLATMEM
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#define pfn_valid(pfn) ((pfn) < max_mapnr)
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#endif /* CONFIG_FLATMEM */
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#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
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#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
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#include <asm-generic/memory_model.h>
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#include <asm-generic/page.h>
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#define __HAVE_ARCH_GATE_AREA 1
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#endif /* __KERNEL__ */
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#endif /* _I386_PAGE_H */
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