mirror of
https://github.com/torvalds/linux
synced 2024-11-05 18:23:50 +00:00
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!
130 lines
3.5 KiB
C
130 lines
3.5 KiB
C
/*
|
|
* Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
|
|
* Copyright 2003 PathScale, Inc.
|
|
* Licensed under the GPL
|
|
*/
|
|
|
|
#ifndef __UM_PAGE_H
|
|
#define __UM_PAGE_H
|
|
|
|
struct page;
|
|
|
|
#include <linux/config.h>
|
|
#include <asm/vm-flags.h>
|
|
|
|
/* PAGE_SHIFT determines the page size */
|
|
#define PAGE_SHIFT 12
|
|
#define PAGE_SIZE (1UL << PAGE_SHIFT)
|
|
#define PAGE_MASK (~(PAGE_SIZE-1))
|
|
|
|
/*
|
|
* These are used to make use of C type-checking..
|
|
*/
|
|
|
|
#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
|
|
#define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE)
|
|
|
|
#define clear_user_page(page, vaddr, pg) clear_page(page)
|
|
#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
|
|
|
|
#if defined(CONFIG_3_LEVEL_PGTABLES) && !defined(CONFIG_64_BIT)
|
|
|
|
typedef struct { unsigned long pte_low, pte_high; } pte_t;
|
|
typedef struct { unsigned long long pmd; } pmd_t;
|
|
typedef struct { unsigned long pgd; } pgd_t;
|
|
#define pte_val(x) ((x).pte_low | ((unsigned long long) (x).pte_high << 32))
|
|
|
|
#define pte_get_bits(pte, bits) ((pte).pte_low & (bits))
|
|
#define pte_set_bits(pte, bits) ((pte).pte_low |= (bits))
|
|
#define pte_clear_bits(pte, bits) ((pte).pte_low &= ~(bits))
|
|
#define pte_copy(to, from) ({ (to).pte_high = (from).pte_high; \
|
|
smp_wmb(); \
|
|
(to).pte_low = (from).pte_low; })
|
|
#define pte_is_zero(pte) (!((pte).pte_low & ~_PAGE_NEWPAGE) && !(pte).pte_high)
|
|
#define pte_set_val(pte, phys, prot) \
|
|
({ (pte).pte_high = (phys) >> 32; \
|
|
(pte).pte_low = (phys) | pgprot_val(prot); })
|
|
|
|
typedef unsigned long long pfn_t;
|
|
typedef unsigned long long phys_t;
|
|
|
|
#else
|
|
|
|
typedef struct { unsigned long pte; } pte_t;
|
|
typedef struct { unsigned long pgd; } pgd_t;
|
|
|
|
#ifdef CONFIG_3_LEVEL_PGTABLES
|
|
typedef struct { unsigned long pmd; } pmd_t;
|
|
#define pmd_val(x) ((x).pmd)
|
|
#define __pmd(x) ((pmd_t) { (x) } )
|
|
#endif
|
|
|
|
#define pte_val(x) ((x).pte)
|
|
|
|
|
|
#define pte_get_bits(p, bits) ((p).pte & (bits))
|
|
#define pte_set_bits(p, bits) ((p).pte |= (bits))
|
|
#define pte_clear_bits(p, bits) ((p).pte &= ~(bits))
|
|
#define pte_copy(to, from) ((to).pte = (from).pte)
|
|
#define pte_is_zero(p) (!((p).pte & ~_PAGE_NEWPAGE))
|
|
#define pte_set_val(p, phys, prot) (p).pte = (phys | pgprot_val(prot))
|
|
|
|
typedef unsigned long pfn_t;
|
|
typedef unsigned long phys_t;
|
|
|
|
#endif
|
|
|
|
typedef struct { unsigned long pgprot; } pgprot_t;
|
|
|
|
#define pgd_val(x) ((x).pgd)
|
|
#define pgprot_val(x) ((x).pgprot)
|
|
|
|
#define __pte(x) ((pte_t) { (x) } )
|
|
#define __pgd(x) ((pgd_t) { (x) } )
|
|
#define __pgprot(x) ((pgprot_t) { (x) } )
|
|
|
|
/* to align the pointer to the (next) page boundary */
|
|
#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
|
|
|
|
extern unsigned long uml_physmem;
|
|
|
|
#define PAGE_OFFSET (uml_physmem)
|
|
#define KERNELBASE PAGE_OFFSET
|
|
|
|
#define __va_space (8*1024*1024)
|
|
|
|
extern unsigned long to_phys(void *virt);
|
|
extern void *to_virt(unsigned long phys);
|
|
#define __pa(virt) to_phys((void *) virt)
|
|
#define __va(phys) to_virt((unsigned long) phys)
|
|
|
|
#define page_to_pfn(page) ((page) - mem_map)
|
|
#define pfn_to_page(pfn) (mem_map + (pfn))
|
|
|
|
#define phys_to_pfn(p) ((p) >> PAGE_SHIFT)
|
|
#define pfn_to_phys(pfn) ((pfn) << PAGE_SHIFT)
|
|
|
|
#define pfn_valid(pfn) ((pfn) < max_mapnr)
|
|
#define virt_addr_valid(v) pfn_valid(phys_to_pfn(__pa(v)))
|
|
|
|
/* Pure 2^n version of get_order */
|
|
static __inline__ int get_order(unsigned long size)
|
|
{
|
|
int order;
|
|
|
|
size = (size-1) >> (PAGE_SHIFT-1);
|
|
order = -1;
|
|
do {
|
|
size >>= 1;
|
|
order++;
|
|
} while (size);
|
|
return order;
|
|
}
|
|
|
|
extern struct page *arch_validate(struct page *page, int mask, int order);
|
|
#define HAVE_ARCH_VALIDATE
|
|
|
|
extern void arch_free_page(struct page *page, int order);
|
|
#define HAVE_ARCH_FREE_PAGE
|
|
|
|
#endif
|