[deliverable/linux.git] / include / asm-powerpc / pgtable.h

#ifndef _ASM_POWERPC_PGTABLE_H
#define _ASM_POWERPC_PGTABLE_H
#ifdef __KERNEL__

#ifndef __ASSEMBLY__
#include <asm/processor.h>		/* For TASK_SIZE */
#include <asm/mmu.h>
#include <asm/page.h>
struct mm_struct;
#endif /* !__ASSEMBLY__ */

#if defined(CONFIG_PPC64)
#  include <asm/pgtable-ppc64.h>
#else
#  include <asm/pgtable-ppc32.h>
#endif

#ifndef __ASSEMBLY__
/*
 * ZERO_PAGE is a global shared page that is always zero: used
 * for zero-mapped memory areas etc..
 */
extern unsigned long empty_zero_page[];
#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))

extern pgd_t swapper_pg_dir[];

extern void paging_init(void);

/*
 * kern_addr_valid is intended to indicate whether an address is a valid
 * kernel address.  Most 32-bit archs define it as always true (like this)
 * but most 64-bit archs actually perform a test.  What should we do here?
 */
#define kern_addr_valid(addr)	(1)

#define io_remap_pfn_range(vma, vaddr, pfn, size, prot)		\
		remap_pfn_range(vma, vaddr, pfn, size, prot)

#include <asm-generic/pgtable.h>


/*
 * This gets called at the end of handling a page fault, when
 * the kernel has put a new PTE into the page table for the process.
 * We use it to ensure coherency between the i-cache and d-cache
 * for the page which has just been mapped in.
 * On machines which use an MMU hash table, we use this to put a
 * corresponding HPTE into the hash table ahead of time, instead of
 * waiting for the inevitable extra hash-table miss exception.
 */
extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t);

#endif /* __ASSEMBLY__ */

#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_PGTABLE_H */
Commit	Line	Data
047ea784 PM	1	#ifndef _ASM_POWERPC_PGTABLE_H
047ea784 PM	2	#define _ASM_POWERPC_PGTABLE_H
88ced031	3	#ifdef __KERNEL__
047ea784	4
9c709f3b DG	5	#ifndef __ASSEMBLY__
	6	#include <asm/processor.h> /* For TASK_SIZE */
	7	#include <asm/mmu.h>
	8	#include <asm/page.h>
	9	struct mm_struct;
	10	#endif /* !__ASSEMBLY__ */
	11
f88df14b DG	12	#if defined(CONFIG_PPC64)
f88df14b DG	13	# include <asm/pgtable-ppc64.h>
047ea784	14	#else
f88df14b	15	# include <asm/pgtable-ppc32.h>
e28f7faf	16	#endif
1da177e4	17
1da177e4	18	#ifndef __ASSEMBLY__
9c709f3b DG	19	/*
	20	* ZERO_PAGE is a global shared page that is always zero: used
	21	* for zero-mapped memory areas etc..
	22	*/
	23	extern unsigned long empty_zero_page[];
	24	#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
	25
	26	extern pgd_t swapper_pg_dir[];
	27
	28	extern void paging_init(void);
	29
	30	/*
	31	* kern_addr_valid is intended to indicate whether an address is a valid
	32	* kernel address. Most 32-bit archs define it as always true (like this)
	33	* but most 64-bit archs actually perform a test. What should we do here?
	34	*/
	35	#define kern_addr_valid(addr) (1)
	36
	37	#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
	38	remap_pfn_range(vma, vaddr, pfn, size, prot)
	39
1da177e4	40	#include <asm-generic/pgtable.h>
1e3519f8 BH	41
	42
	43	/*
	44	* This gets called at the end of handling a page fault, when
	45	* the kernel has put a new PTE into the page table for the process.
	46	* We use it to ensure coherency between the i-cache and d-cache
	47	* for the page which has just been mapped in.
	48	* On machines which use an MMU hash table, we use this to put a
	49	* corresponding HPTE into the hash table ahead of time, instead of
	50	* waiting for the inevitable extra hash-table miss exception.
	51	*/
	52	extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t);
	53
1da177e4 LT	54	#endif /* __ASSEMBLY__ */
1da177e4 LT	55
88ced031	56	#endif /* __KERNEL__ */
047ea784	57	#endif /* _ASM_POWERPC_PGTABLE_H */