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#ifndef _M68K_PAGE_H
#define _M68K_PAGE_H
#include <linux/config.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 <asm/setup.h>
#define STRICT_MM_TYPECHECKS
#define get_user_page(vaddr) __get_free_page(GFP_KERNEL)
#define free_user_page(page, addr) free_page(addr)
/*
* We don't need to check for alignment etc.
*/
#ifdef CPU_M68040_OR_M68060_ONLY
static inline void copy_page(unsigned long to, unsigned long from)
{
unsigned long tmp;
__asm__ __volatile__("1:\t"
".chip 68040\n\t"
"move16 %1@+,%0@+\n\t"
"move16 %1@+,%0@+\n\t"
".chip 68k\n\t"
"dbra %2,1b\n\t"
: "=a" (to), "=a" (from), "=d" (tmp)
: "0" (to), "1" (from) , "2" (PAGE_SIZE / 32 - 1)
);
}
static inline void clear_page(unsigned long page)
{
unsigned long data, sp, tmp;
sp = page;
data = 0;
*((unsigned long *)(page))++ = 0;
*((unsigned long *)(page))++ = 0;
*((unsigned long *)(page))++ = 0;
*((unsigned long *)(page))++ = 0;
__asm__ __volatile__("1:\t"
".chip 68040\n\t"
"move16 %2@+,%0@+\n\t"
".chip 68k\n\t"
"subqw #8,%2\n\t"
"subqw #8,%2\n\t"
"dbra %1,1b\n\t"
: "=a" (page), "=d" (tmp)
: "a" (sp), "0" (page),
"1" ((PAGE_SIZE - 16) / 16 - 1));
}
#else
#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
#define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE)
#endif
#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[16]; } 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[0])
#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 struct { unsigned long pmd[16]; } pmd_t;
typedef unsigned long pgd_t;
typedef unsigned long pgprot_t;
#define pte_val(x) (x)
#define pmd_val(x) ((&x)->pmd[0])
#define pgd_val(x) (x)
#define pgprot_val(x) (x)
#define __pte(x) (x)
#define __pmd(x) ((pmd_t) { (x) } )
#define __pgd(x) (x)
#define __pgprot(x) (x)
#endif
/* to align the pointer to the (next) page boundary */
#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
/* This handles the memory map.. */
#define PAGE_OFFSET 0
#define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
/*
* A hacky workaround for the problems with mmap() of frame buffer
* memory in the lower 16MB physical memoryspace.
*
* This is a short term solution, we will have to deal properly
* with this in 2.3.x.
*/
extern inline void *__va(unsigned long physaddr)
{
#ifdef CONFIG_AMIGA
if (MACH_IS_AMIGA && (physaddr < 16*1024*1024))
return (void *)0xffffffff;
else
#endif
return (void *)(physaddr+PAGE_OFFSET);
}
#define MAP_NR(addr) (__pa(addr) >> PAGE_SHIFT)
#endif /* __KERNEL__ */
#endif /* _M68K_PAGE_H */
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