116 lines
3.0 KiB
C
116 lines
3.0 KiB
C
|
#ifndef _ASM_M32R_PAGE_H
|
||
|
|
#define _ASM_M32R_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__
|
||
|
|
#ifndef __ASSEMBLY__
|
||
|
|
|
||
|
|
extern void clear_page(void *to);
|
||
|
|
extern void copy_page(void *to, void *from);
|
||
|
|
|
||
|
|
#define clear_user_page(page, vaddr, pg) clear_page(page)
|
||
|
|
#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
|
||
|
|
|
||
|
|
#define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr)
|
||
|
|
#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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;
|
||
|
|
#define pte_val(x) ((x).pte)
|
||
|
|
#define PTE_MASK PAGE_MASK
|
||
|
|
|
||
|
|
typedef struct { unsigned long pgprot; } pgprot_t;
|
||
|
|
|
||
|
|
#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) } )
|
||
|
|
|
||
|
|
#endif /* !__ASSEMBLY__ */
|
||
|
|
|
||
|
|
/* to align the pointer to the (next) page boundary */
|
||
|
|
#define PAGE_ALIGN(addr) (((addr) + PAGE_SIZE - 1) & PAGE_MASK)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* This handles the memory map.. We could make this a config
|
||
|
|
* option, but too many people screw it up, and too few need
|
||
|
|
* it.
|
||
|
|
*
|
||
|
|
* A __PAGE_OFFSET of 0xC0000000 means that the kernel has
|
||
|
|
* a virtual address space of one gigabyte, which limits the
|
||
|
|
* amount of physical memory you can use to about 950MB.
|
||
|
|
*
|
||
|
|
* If you want more physical memory than this then see the CONFIG_HIGHMEM4G
|
||
|
|
* and CONFIG_HIGHMEM64G options in the kernel configuration.
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
/* This handles the memory map.. */
|
||
|
|
|
||
|
|
#ifndef __ASSEMBLY__
|
||
|
|
|
||
|
|
/* Pure 2^n version of get_order */
|
||
|
|
static __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 __MEMORY_START CONFIG_MEMORY_START
|
||
|
|
#define __MEMORY_SIZE CONFIG_MEMORY_SIZE
|
||
|
|
|
||
|
|
#ifdef CONFIG_MMU
|
||
|
|
#define __PAGE_OFFSET (0x80000000)
|
||
|
|
#else
|
||
|
|
#define __PAGE_OFFSET (0x00000000)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
|
||
|
|
#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET)
|
||
|
|
#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET))
|
||
|
|
|
||
|
|
#ifndef CONFIG_DISCONTIGMEM
|
||
|
|
#define PFN_BASE (CONFIG_MEMORY_START >> PAGE_SHIFT)
|
||
|
|
#define pfn_to_page(pfn) (mem_map + ((pfn) - PFN_BASE))
|
||
|
|
#define page_to_pfn(page) \
|
||
|
|
((unsigned long)((page) - mem_map) + PFN_BASE)
|
||
|
|
#define pfn_valid(pfn) (((pfn) - PFN_BASE) < max_mapnr)
|
||
|
|
#endif /* !CONFIG_DISCONTIGMEM */
|
||
|
|
|
||
|
|
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
|
||
|
|
#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
|
||
|
|
|
||
|
|
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
|
||
|
|
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC )
|
||
|
|
|
||
|
|
#define devmem_is_allowed(x) 1
|
||
|
|
|
||
|
|
#endif /* __KERNEL__ */
|
||
|
|
|
||
|
|
#endif /* _ASM_M32R_PAGE_H */
|
||
|
|
|