163 строки
4.4 KiB
C
163 строки
4.4 KiB
C
#ifndef _PARISC_PAGE_H
|
|
#define _PARISC_PAGE_H
|
|
|
|
/* PAGE_SHIFT determines the page size */
|
|
#define PAGE_SHIFT 12
|
|
#define PAGE_SIZE (1UL << PAGE_SHIFT)
|
|
#define PAGE_MASK (~(PAGE_SIZE-1))
|
|
|
|
#ifdef __KERNEL__
|
|
#include <linux/config.h>
|
|
#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;
|
|
|
|
extern void purge_kernel_dcache_page(unsigned long);
|
|
extern void copy_user_page_asm(void *to, void *from);
|
|
extern void clear_user_page_asm(void *page, unsigned long vaddr);
|
|
|
|
static inline void
|
|
copy_user_page(void *vto, void *vfrom, unsigned long vaddr, struct page *pg)
|
|
{
|
|
copy_user_page_asm(vto, vfrom);
|
|
flush_kernel_dcache_page(vto);
|
|
/* XXX: ppc flushes icache too, should we? */
|
|
}
|
|
|
|
static inline void
|
|
clear_user_page(void *page, unsigned long vaddr, struct page *pg)
|
|
{
|
|
purge_kernel_dcache_page((unsigned long)page);
|
|
clear_user_page_asm(page, vaddr);
|
|
}
|
|
|
|
/*
|
|
* These are used to make use of C type-checking..
|
|
*/
|
|
#ifdef __LP64__
|
|
typedef struct { unsigned long pte; } pte_t;
|
|
#else
|
|
typedef struct {
|
|
unsigned long pte;
|
|
unsigned long flags;
|
|
} pte_t;
|
|
#endif
|
|
/* 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)
|
|
#ifdef __LP64__
|
|
#define pte_flags(x) (*(__u32 *)&((x).pte))
|
|
#else
|
|
#define pte_flags(x) ((x).flags)
|
|
#endif
|
|
|
|
/* 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 __pmd_val_set(x,n) (x).pmd = (n)
|
|
#define __pgd_val_set(x,n) (x).pgd = (n)
|
|
|
|
#define __pte(x) ((pte_t) { (x) } )
|
|
#define __pmd(x) ((pmd_t) { (x) } )
|
|
#define __pgd(x) ((pgd_t) { (x) } )
|
|
#define __pgprot(x) ((pgprot_t) { (x) } )
|
|
|
|
/* Pure 2^n version of get_order */
|
|
extern __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;
|
|
}
|
|
|
|
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 */
|
|
#define __PAGE_OFFSET (0x10000000)
|
|
|
|
#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_to_page(pfn) (mem_map + (pfn))
|
|
#define page_to_pfn(page) ((unsigned long)((page) - mem_map))
|
|
#define pfn_valid(pfn) ((pfn) < max_mapnr)
|
|
#endif /* CONFIG_DISCONTIGMEM */
|
|
|
|
#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)
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* _PARISC_PAGE_H */
|