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#ifndef _M68K_PAGE_H
#define _M68K_PAGE_H
#include <linux/config.h>
/* PAGE_SHIFT determines the page size */
#ifndef CONFIG_SUN3
#define PAGE_SHIFT (12)
#define PAGE_SIZE (4096)
#else
#define PAGE_SHIFT (13)
#define PAGE_SIZE (8192)
#endif
#define PAGE_MASK (~(PAGE_SIZE-1))
#ifdef __KERNEL__
#include <asm/setup.h>
#if PAGE_SHIFT < 13
#define KTHREAD_SIZE (8192)
#else
#define KTHREAD_SIZE PAGE_SIZE
#endif
#ifndef __ASSEMBLY__
#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(void *to, void *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(void *page)
{
unsigned long data, tmp;
void *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((page), 0, PAGE_SIZE)
#define copy_page(to,from) memcpy((to), (from), PAGE_SIZE)
#endif
#define clear_user_page(page, vaddr) clear_page(page)
#define copy_user_page(to, from, vaddr) copy_page(to, from)
/*
* 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) } )
/* to align the pointer to the (next) page boundary */
#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
/* 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__ */
#include <asm/page_offset.h>
#define PAGE_OFFSET (PAGE_OFFSET_RAW)
#ifndef __ASSEMBLY__
#ifndef CONFIG_SUN3
#ifdef CONFIG_SINGLE_MEMORY_CHUNK
extern unsigned long m68k_memoffset;
#define __pa(vaddr) ((unsigned long)(vaddr)+m68k_memoffset)
#define __va(paddr) ((void *)((unsigned long)(paddr)-m68k_memoffset))
#else
#define __pa(vaddr) virt_to_phys((void *)vaddr)
#define __va(paddr) phys_to_virt((unsigned long)paddr)
#endif
#else /* !CONFIG_SUN3 */
/* This #define is a horrible hack to suppress lots of warnings. --m */
#define __pa(x) ___pa((unsigned long)x)
static inline unsigned long ___pa(unsigned long x)
{
if(x == 0)
return 0;
if(x > PAGE_OFFSET)
return (x-PAGE_OFFSET);
else
return (x+0x2000000);
}
static inline void *__va(unsigned long x)
{
if(x == 0)
return (void *)0;
if(x < 0x2000000)
return (void *)(x+PAGE_OFFSET);
else
return (void *)(x-0x2000000);
}
#endif /* CONFIG_SUN3 */
#define MAP_NR(addr) (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT)
#define virt_to_page(kaddr) (mem_map + (((unsigned long)(kaddr)-PAGE_OFFSET) >> PAGE_SHIFT))
#define VALID_PAGE(page) ((page - mem_map) < max_mapnr)
#ifndef CONFIG_SUN3
#define BUG() do { \
printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__); \
asm volatile("illegal"); \
} while (0)
#else
#define BUG() do { \
printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__); \
panic("BUG!"); \
} while (0)
#endif
#define PAGE_BUG(page) do { \
BUG(); \
} while (0)
#endif /* __ASSEMBLY__ */
#endif /* __KERNEL__ */
#endif /* _M68K_PAGE_H */
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