mirror of
https://github.com/torvalds/linux.git
synced 2024-11-16 17:12:06 +00:00
179 lines
5.0 KiB
C
179 lines
5.0 KiB
C
#ifndef _PARISC_PAGE_H
|
|
#define _PARISC_PAGE_H
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#if defined(CONFIG_PARISC_PAGE_SIZE_4KB)
|
|
# define PAGE_SHIFT 12
|
|
#elif defined(CONFIG_PARISC_PAGE_SIZE_16KB)
|
|
# define PAGE_SHIFT 14
|
|
#elif defined(CONFIG_PARISC_PAGE_SIZE_64KB)
|
|
# define PAGE_SHIFT 16
|
|
#else
|
|
# error "unknown default kernel page size"
|
|
#endif
|
|
#define PAGE_SIZE (1UL << PAGE_SHIFT)
|
|
#define PAGE_MASK (~(PAGE_SIZE-1))
|
|
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#include <asm/types.h>
|
|
#include <asm/cache.h>
|
|
|
|
#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
|
|
#define copy_page(to,from) copy_user_page_asm((void *)(to), (void *)(from))
|
|
|
|
struct page;
|
|
|
|
void copy_user_page_asm(void *to, void *from);
|
|
void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
|
|
struct page *pg);
|
|
void clear_user_page(void *page, unsigned long vaddr, struct page *pg);
|
|
|
|
/*
|
|
* These are used to make use of C type-checking..
|
|
*/
|
|
#define STRICT_MM_TYPECHECKS
|
|
#ifdef STRICT_MM_TYPECHECKS
|
|
typedef struct { unsigned long pte;
|
|
#if !defined(CONFIG_64BIT)
|
|
unsigned long future_flags;
|
|
/* XXX: it's possible to remove future_flags and change BITS_PER_PTE_ENTRY
|
|
to 2, but then strangely the identical 32bit kernel boots on a
|
|
c3000(pa20), but not any longer on a 715(pa11).
|
|
Still investigating... HelgeD.
|
|
*/
|
|
#endif
|
|
} pte_t; /* either 32 or 64bit */
|
|
|
|
/* NOTE: even on 64 bits, these entries are __u32 because we allocate
|
|
* the pmd and pgd in ZONE_DMA (i.e. under 4GB) */
|
|
typedef struct { __u32 pmd; } pmd_t;
|
|
typedef struct { __u32 pgd; } pgd_t;
|
|
typedef struct { unsigned long pgprot; } pgprot_t;
|
|
|
|
#define pte_val(x) ((x).pte)
|
|
/* These do not work lvalues, so make sure we don't use them as such. */
|
|
#define pmd_val(x) ((x).pmd + 0)
|
|
#define pgd_val(x) ((x).pgd + 0)
|
|
#define pgprot_val(x) ((x).pgprot)
|
|
|
|
#define __pte(x) ((pte_t) { (x) } )
|
|
#define __pmd(x) ((pmd_t) { (x) } )
|
|
#define __pgd(x) ((pgd_t) { (x) } )
|
|
#define __pgprot(x) ((pgprot_t) { (x) } )
|
|
|
|
#define __pmd_val_set(x,n) (x).pmd = (n)
|
|
#define __pgd_val_set(x,n) (x).pgd = (n)
|
|
|
|
#else
|
|
/*
|
|
* .. while these make it easier on the compiler
|
|
*/
|
|
typedef unsigned long pte_t;
|
|
typedef __u32 pmd_t;
|
|
typedef __u32 pgd_t;
|
|
typedef unsigned long pgprot_t;
|
|
|
|
#define pte_val(x) (x)
|
|
#define pmd_val(x) (x)
|
|
#define pgd_val(x) (x)
|
|
#define pgprot_val(x) (x)
|
|
|
|
#define __pte(x) (x)
|
|
#define __pmd(x) (x)
|
|
#define __pgd(x) (x)
|
|
#define __pgprot(x) (x)
|
|
|
|
#define __pmd_val_set(x,n) (x) = (n)
|
|
#define __pgd_val_set(x,n) (x) = (n)
|
|
|
|
#endif /* STRICT_MM_TYPECHECKS */
|
|
|
|
|
|
typedef struct __physmem_range {
|
|
unsigned long start_pfn;
|
|
unsigned long pages; /* PAGE_SIZE pages */
|
|
} physmem_range_t;
|
|
|
|
extern physmem_range_t pmem_ranges[];
|
|
extern int npmem_ranges;
|
|
|
|
#endif /* !__ASSEMBLY__ */
|
|
|
|
/* WARNING: The definitions below must match exactly to sizeof(pte_t)
|
|
* etc
|
|
*/
|
|
#ifdef __LP64__
|
|
#define BITS_PER_PTE_ENTRY 3
|
|
#define BITS_PER_PMD_ENTRY 2
|
|
#define BITS_PER_PGD_ENTRY 2
|
|
#else
|
|
#define BITS_PER_PTE_ENTRY 3
|
|
#define BITS_PER_PMD_ENTRY 2
|
|
#define BITS_PER_PGD_ENTRY BITS_PER_PMD_ENTRY
|
|
#endif
|
|
#define PGD_ENTRY_SIZE (1UL << BITS_PER_PGD_ENTRY)
|
|
#define PMD_ENTRY_SIZE (1UL << BITS_PER_PMD_ENTRY)
|
|
#define PTE_ENTRY_SIZE (1UL << BITS_PER_PTE_ENTRY)
|
|
|
|
/* to align the pointer to the (next) page boundary */
|
|
#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
|
|
|
|
|
|
#define LINUX_GATEWAY_SPACE 0
|
|
|
|
/* This governs the relationship between virtual and physical addresses.
|
|
* If you alter it, make sure to take care of our various fixed mapping
|
|
* segments in fixmap.h */
|
|
#ifdef CONFIG_64BIT
|
|
#define __PAGE_OFFSET (0x40000000) /* 1GB */
|
|
#else
|
|
#define __PAGE_OFFSET (0x10000000) /* 256MB */
|
|
#endif
|
|
|
|
#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
|
|
|
|
/* The size of the gateway page (we leave lots of room for expansion) */
|
|
#define GATEWAY_PAGE_SIZE 0x4000
|
|
|
|
/* The start of the actual kernel binary---used in vmlinux.lds.S
|
|
* Leave some space after __PAGE_OFFSET for detecting kernel null
|
|
* ptr derefs */
|
|
#define KERNEL_BINARY_TEXT_START (__PAGE_OFFSET + 0x100000)
|
|
|
|
/* These macros don't work for 64-bit C code -- don't allow in C at all */
|
|
#ifdef __ASSEMBLY__
|
|
# define PA(x) ((x)-__PAGE_OFFSET)
|
|
# define VA(x) ((x)+__PAGE_OFFSET)
|
|
#endif
|
|
#define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
|
|
#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
|
|
|
|
#ifndef CONFIG_DISCONTIGMEM
|
|
#define pfn_valid(pfn) ((pfn) < max_mapnr)
|
|
#endif /* CONFIG_DISCONTIGMEM */
|
|
|
|
#ifdef CONFIG_HUGETLB_PAGE
|
|
#define HPAGE_SHIFT 22 /* 4MB (is this fixed?) */
|
|
#define HPAGE_SIZE ((1UL) << HPAGE_SHIFT)
|
|
#define HPAGE_MASK (~(HPAGE_SIZE - 1))
|
|
#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
|
|
#endif
|
|
|
|
#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
|
|
|
|
#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
|
|
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
|
|
|
|
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
|
|
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
|
|
|
|
#include <asm-generic/memory_model.h>
|
|
#include <asm-generic/page.h>
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* _PARISC_PAGE_H */
|