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/* $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()
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__) */
#endif /* !(__KERNEL__) */
#endif /* !(_SPARC64_PAGE_H) */
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