forked from Minki/linux
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
116 lines
2.7 KiB
C
116 lines
2.7 KiB
C
#ifndef _ASMARM_PAGE_H
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#define _ASMARM_PAGE_H
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#include <linux/config.h>
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#ifdef __KERNEL__
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#ifndef __ASSEMBLY__
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extern void __clear_user_page(void *p, unsigned long user);
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extern void __copy_user_page(void *to, const void *from, unsigned long user);
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extern void copy_page(void *to, const void *from);
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//FIXME these may be wrong on ARM26
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#define clear_user_page(addr,vaddr,pg) \
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do { \
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preempt_disable(); \
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__clear_user_page(addr, vaddr); \
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preempt_enable(); \
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} while (0)
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#define copy_user_page(to,from,vaddr,pg) \
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do { \
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preempt_disable(); \
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__copy_user_page(to, from, vaddr); \
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preempt_enable(); \
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} while (0)
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#define clear_page(page) memzero((void *)(page), PAGE_SIZE)
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#define copy_page(to, from) __copy_user_page(to, from, 0);
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#undef STRICT_MM_TYPECHECKS
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#ifdef STRICT_MM_TYPECHECKS
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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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typedef struct { unsigned long pgd; } pgd_t;
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typedef struct { unsigned long pte; } pte_t;
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typedef struct { unsigned long pmd; } pmd_t;
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typedef struct { unsigned long pgprot; } pgprot_t;
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#define pgd_val(x) ((x).pgd)
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#define pte_val(x) ((x).pte)
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#define pmd_val(x) ((x).pmd)
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#define pgprot_val(x) ((x).pgprot)
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#define __pte(x) ((pte_t) { (x) } )
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#define __pmd(x) ((pmd_t) { (x) } )
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#define __pgprot(x) ((pgprot_t) { (x) } )
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#else
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/*
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* .. while these make it easier on the compiler
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*/
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typedef unsigned long pgd_t;
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typedef unsigned long pte_t;
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typedef unsigned long pmd_t;
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typedef unsigned long pgprot_t;
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//FIXME - should these cast to unsigned long?
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#define pgd_val(x) (x)
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#define pte_val(x) (x)
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#define pmd_val(x) (x)
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#define pgprot_val(x) (x)
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#define __pte(x) (x)
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#define __pmd(x) (x)
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#define __pgprot(x) (x)
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#endif /* STRICT_MM_TYPECHECKS */
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#endif /* !__ASSEMBLY__ */
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#endif /* __KERNEL__ */
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/* PAGE_SHIFT determines the page size. This is configurable. */
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#if defined(CONFIG_PAGESIZE_16)
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#define PAGE_SHIFT 14 /* 16K */
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#else /* default */
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#define PAGE_SHIFT 15 /* 32K */
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#endif
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#define EXEC_PAGESIZE 32768
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#define PAGE_SIZE (1UL << PAGE_SHIFT)
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#define PAGE_MASK (~(PAGE_SIZE-1))
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/* to align the pointer to the (next) page boundary */
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#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
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#ifdef __KERNEL__
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#ifndef __ASSEMBLY__
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/* Pure 2^n version of get_order */
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static inline int get_order(unsigned long size)
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{
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int order;
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size = (size-1) >> (PAGE_SHIFT-1);
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order = -1;
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do {
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size >>= 1;
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order++;
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} while (size);
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return order;
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}
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#include <asm/memory.h>
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#endif /* !__ASSEMBLY__ */
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#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
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VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
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#endif /* __KERNEL__ */
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#endif
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