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/*
* BK Id: SCCS/s.page.h 1.8 08/19/01 20:06:47 paulus
*/
#ifndef _PPC_PAGE_H
#define _PPC_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>
/* Be sure to change arch/ppc/Makefile to match */
#define PAGE_OFFSET 0xc0000000
#define KERNELBASE PAGE_OFFSET
#ifndef __ASSEMBLY__
#include <asm/system.h> /* for xmon definition */
#ifdef CONFIG_XMON
#define BUG() do { \
printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__); \
xmon(0); \
} while (0)
#else
#define BUG() do { \
printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__); \
__asm__ __volatile__(".long 0x0"); \
} while (0)
#endif
#define PAGE_BUG(page) do { BUG(); } while (0)
#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 pmd; } pmd_t;
typedef struct { unsigned long pgd; } pgd_t;
typedef struct { unsigned long pgprot; } pgprot_t;
#define pte_val(x) ((x).pte)
#define pmd_val(x) ((x).pmd)
#define pgd_val(x) ((x).pgd)
#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) } )
#else
/*
* .. while these make it easier on the compiler
*/
typedef unsigned long pte_t;
typedef unsigned long pmd_t;
typedef unsigned long 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)
#endif
/* align addr on a size boundry - adjust address up if needed -- Cort */
#define _ALIGN(addr,size) (((addr)+size-1)&(~(size-1)))
/* to align the pointer to the (next) page boundary */
#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
extern void clear_page(void *page);
extern void copy_page(void *to, void *from);
#define clear_user_page(page, vaddr) clear_page(page)
#define copy_user_page(to, from, vaddr) copy_page(to, from)
/* map phys->virtual and virtual->phys for RAM pages */
static inline unsigned long ___pa(unsigned long v)
{
unsigned long p;
asm volatile ("1: addis %0, %1, %2;"
".section \".vtop_fixup\",\"aw\";"
".align 1;"
".long 1b;"
".previous;"
: "=r" (p)
: "b" (v), "K" (((-PAGE_OFFSET) >> 16) & 0xffff));
return p;
}
static inline void* ___va(unsigned long p)
{
unsigned long v;
asm volatile ("1: addis %0, %1, %2;"
".section \".ptov_fixup\",\"aw\";"
".align 1;"
".long 1b;"
".previous;"
: "=r" (v)
: "b" (p), "K" (((PAGE_OFFSET) >> 16) & 0xffff));
return (void*) v;
}
#define __pa(x) ___pa ((unsigned long)(x))
#define __va(x) ___va ((unsigned long)(x))
#define MAP_PAGE_RESERVED (1<<15)
#define virt_to_page(kaddr) (mem_map + (((unsigned long)kaddr-PAGE_OFFSET) >> PAGE_SHIFT))
#define VALID_PAGE(page) ((page - mem_map) < max_mapnr)
extern unsigned long get_zero_page_fast(void);
/* 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 /* _PPC_PAGE_H */
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