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linux
x86: Split pgtable_32.h into pgtable_32.h and pgtable_32_types.h
Signed-off-by: Jeremy Fitzhardinge <jeremy@goop.org>
authored by
Jeremy Fitzhardinge
and committed by
Jeremy Fitzhardinge
f402a65f
8d19c99f
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arch/x86/include/asm/pgtable_32.h
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arch/x86/include/asm/pgtable_32.h
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#ifndef _ASM_X86_PGTABLE_32_H
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#define _ASM_X86_PGTABLE_32_H
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#include <asm/pgtable_32_types.h>
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/*
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* The Linux memory management assumes a three-level page table setup. On
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extern void set_pmd_pfn(unsigned long, unsigned long, pgprot_t);
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/*
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* The Linux x86 paging architecture is 'compile-time dual-mode', it
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* implements both the traditional 2-level x86 page tables and the
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* newer 3-level PAE-mode page tables.
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*/
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#ifdef CONFIG_X86_PAE
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# include <asm/pgtable-3level_types.h>
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# define PMD_SIZE (1UL << PMD_SHIFT)
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# define PMD_MASK (~(PMD_SIZE - 1))
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#else
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# include <asm/pgtable-2level_types.h>
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#endif
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#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
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#define PGDIR_MASK (~(PGDIR_SIZE - 1))
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/* Just any arbitrary offset to the start of the vmalloc VM area: the
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* current 8MB value just means that there will be a 8MB "hole" after the
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* physical memory until the kernel virtual memory starts. That means that
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* any out-of-bounds memory accesses will hopefully be caught.
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* The vmalloc() routines leaves a hole of 4kB between each vmalloced
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* area for the same reason. ;)
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*/
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#define VMALLOC_OFFSET (8 * 1024 * 1024)
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#define VMALLOC_START ((unsigned long)high_memory + VMALLOC_OFFSET)
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#ifdef CONFIG_X86_PAE
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#define LAST_PKMAP 512
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#else
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#define LAST_PKMAP 1024
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#endif
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#define PKMAP_BASE ((FIXADDR_BOOT_START - PAGE_SIZE * (LAST_PKMAP + 1)) \
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& PMD_MASK)
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#ifdef CONFIG_HIGHMEM
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# define VMALLOC_END (PKMAP_BASE - 2 * PAGE_SIZE)
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#else
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# define VMALLOC_END (FIXADDR_START - 2 * PAGE_SIZE)
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#endif
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#define MAXMEM (VMALLOC_END - PAGE_OFFSET - __VMALLOC_RESERVE)
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/*
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* Define this if things work differently on an i386 and an i486:
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arch/x86/include/asm/pgtable_32_types.h
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arch/x86/include/asm/pgtable_32_types.h
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#ifndef _ASM_X86_PGTABLE_32_DEFS_H
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#define _ASM_X86_PGTABLE_32_DEFS_H
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/*
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* The Linux x86 paging architecture is 'compile-time dual-mode', it
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* implements both the traditional 2-level x86 page tables and the
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* newer 3-level PAE-mode page tables.
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*/
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#ifdef CONFIG_X86_PAE
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# include <asm/pgtable-3level_types.h>
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# define PMD_SIZE (1UL << PMD_SHIFT)
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# define PMD_MASK (~(PMD_SIZE - 1))
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#else
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# include <asm/pgtable-2level_types.h>
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#endif
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#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
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#define PGDIR_MASK (~(PGDIR_SIZE - 1))
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/* Just any arbitrary offset to the start of the vmalloc VM area: the
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* current 8MB value just means that there will be a 8MB "hole" after the
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* physical memory until the kernel virtual memory starts. That means that
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* any out-of-bounds memory accesses will hopefully be caught.
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* The vmalloc() routines leaves a hole of 4kB between each vmalloced
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* area for the same reason. ;)
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*/
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#define VMALLOC_OFFSET (8 * 1024 * 1024)
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#define VMALLOC_START ((unsigned long)high_memory + VMALLOC_OFFSET)
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#ifdef CONFIG_X86_PAE
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#define LAST_PKMAP 512
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#else
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#define LAST_PKMAP 1024
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#endif
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#define PKMAP_BASE ((FIXADDR_BOOT_START - PAGE_SIZE * (LAST_PKMAP + 1)) \
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& PMD_MASK)
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#ifdef CONFIG_HIGHMEM
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# define VMALLOC_END (PKMAP_BASE - 2 * PAGE_SIZE)
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#else
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# define VMALLOC_END (FIXADDR_START - 2 * PAGE_SIZE)
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#endif
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#define MAXMEM (VMALLOC_END - PAGE_OFFSET - __VMALLOC_RESERVE)
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#endif /* _ASM_X86_PGTABLE_32_DEFS_H */