page.h
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上传日期:2013-04-10
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文件大小:4k
- /* $Id: page.h,v 1.38 2001/11/30 01:04:10 davem Exp $ */
- #ifndef _SPARC64_PAGE_H
- #define _SPARC64_PAGE_H
- #define PAGE_SHIFT 13
- #ifndef __ASSEMBLY__
- /* I have my suspicions... -DaveM */
- #define PAGE_SIZE (1UL << PAGE_SHIFT)
- #else
- #define PAGE_SIZE (1 << PAGE_SHIFT)
- #endif
- #define PAGE_MASK (~(PAGE_SIZE-1))
- #ifdef __KERNEL__
- #ifndef __ASSEMBLY__
- #ifdef CONFIG_DEBUG_BUGVERBOSE
- extern void do_BUG(const char *file, int line);
- #define BUG() do {
- do_BUG(__FILE__, __LINE__);
- __builtin_trap();
- } while (0)
- #else
- #define BUG() __builtin_trap()
- #endif
- #define PAGE_BUG(page) BUG()
- /* Sparc64 is slow at multiplication, we prefer to use some extra space. */
- #define WANT_PAGE_VIRTUAL 1
- extern void _clear_page(void *page);
- #define clear_page(X) _clear_page((void *)(X))
- extern void clear_user_page(void *page, unsigned long vaddr);
- extern void copy_user_page(void *to, void *from, unsigned long vaddr);
- /* GROSS, defining this makes gcc pass these types as aggregates,
- * and thus on the stack, turn this crap off... -DaveM
- */
- /* #define STRICT_MM_TYPECHECKS */
- #ifdef STRICT_MM_TYPECHECKS
- /* These are used to make use of C type-checking.. */
- typedef struct { unsigned long pte; } pte_t;
- typedef struct { unsigned long iopte; } iopte_t;
- typedef struct { unsigned int pmd; } pmd_t;
- typedef struct { unsigned int pgd; } pgd_t;
- typedef struct { unsigned long ctxd; } ctxd_t;
- typedef struct { unsigned long pgprot; } pgprot_t;
- typedef struct { unsigned long iopgprot; } iopgprot_t;
- #define pte_val(x) ((x).pte)
- #define iopte_val(x) ((x).iopte)
- #define pmd_val(x) ((unsigned long)(x).pmd)
- #define pgd_val(x) ((unsigned long)(x).pgd)
- #define ctxd_val(x) ((x).ctxd)
- #define pgprot_val(x) ((x).pgprot)
- #define iopgprot_val(x) ((x).iopgprot)
- #define __pte(x) ((pte_t) { (x) } )
- #define __iopte(x) ((iopte_t) { (x) } )
- #define __pmd(x) ((pmd_t) { (x) } )
- #define __pgd(x) ((pgd_t) { (x) } )
- #define __ctxd(x) ((ctxd_t) { (x) } )
- #define __pgprot(x) ((pgprot_t) { (x) } )
- #define __iopgprot(x) ((iopgprot_t) { (x) } )
- #else
- /* .. while these make it easier on the compiler */
- typedef unsigned long pte_t;
- typedef unsigned long iopte_t;
- typedef unsigned int pmd_t;
- typedef unsigned int pgd_t;
- typedef unsigned long ctxd_t;
- typedef unsigned long pgprot_t;
- typedef unsigned long iopgprot_t;
- #define pte_val(x) (x)
- #define iopte_val(x) (x)
- #define pmd_val(x) ((unsigned long)(x))
- #define pgd_val(x) ((unsigned long)(x))
- #define ctxd_val(x) (x)
- #define pgprot_val(x) (x)
- #define iopgprot_val(x) (x)
- #define __pte(x) (x)
- #define __iopte(x) (x)
- #define __pmd(x) (x)
- #define __pgd(x) (x)
- #define __ctxd(x) (x)
- #define __pgprot(x) (x)
- #define __iopgprot(x) (x)
- #endif /* (STRICT_MM_TYPECHECKS) */
- #define TASK_UNMAPPED_BASE ((current->thread.flags & SPARC_FLAG_32BIT) ?
- (0x0000000070000000UL) : (PAGE_OFFSET))
- #endif /* !(__ASSEMBLY__) */
- /* to align the pointer to the (next) page boundary */
- #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
- #ifndef __ASSEMBLY__
- /* Do prdele, look what happens to be in %g4... */
- register unsigned long PAGE_OFFSET asm("g4");
- #else
- #define PAGE_OFFSET 0xFFFFF80000000000
- #endif
- #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET)
- #define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET))
- #define virt_to_page(kaddr) (mem_map + ((__pa(kaddr)-phys_base) >> PAGE_SHIFT))
- #define VALID_PAGE(page) ((page - mem_map) < max_mapnr)
- #define virt_to_phys __pa
- #define phys_to_virt __va
- #ifndef __ASSEMBLY__
- /* The following structure is used to hold the physical
- * memory configuration of the machine. This is filled in
- * probe_memory() and is later used by mem_init() to set up
- * mem_map[]. We statically allocate SPARC_PHYS_BANKS of
- * these structs, this is arbitrary. The entry after the
- * last valid one has num_bytes==0.
- */
- struct sparc_phys_banks {
- unsigned long base_addr;
- unsigned long num_bytes;
- };
- #define SPARC_PHYS_BANKS 32
- extern struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS];
- /* 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;
- }
- #endif /* !(__ASSEMBLY__) */
- #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC |
- VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
- #endif /* !(__KERNEL__) */
- #endif /* !(_SPARC64_PAGE_H) */