[mirror_ubuntu-artful-kernel.git] / arch / powerpc / include / asm / pgtable.h

#ifndef _ASM_POWERPC_PGTABLE_H
#define _ASM_POWERPC_PGTABLE_H

#ifndef __ASSEMBLY__
#include <linux/mmdebug.h>
#include <linux/mmzone.h>
#include <asm/processor.h>		/* For TASK_SIZE */
#include <asm/mmu.h>
#include <asm/page.h>

struct mm_struct;

#endif /* !__ASSEMBLY__ */

#ifdef CONFIG_PPC_BOOK3S
#include <asm/book3s/pgtable.h>
#else
#include <asm/nohash/pgtable.h>
#endif /* !CONFIG_PPC_BOOK3S */

#ifndef __ASSEMBLY__

#include <asm/tlbflush.h>

/* Keep these as a macros to avoid include dependency mess */
#define pte_page(x)		pfn_to_page(pte_pfn(x))
#define mk_pte(page, pgprot)	pfn_pte(page_to_pfn(page), (pgprot))

/*
 * 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[];

void limit_zone_pfn(enum zone_type zone, unsigned long max_pfn);
int dma_pfn_limit_to_zone(u64 pfn_limit);
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)

#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 *);

extern int gup_hugepte(pte_t *ptep, unsigned long sz, unsigned long addr,
		       unsigned long end, int write,
		       struct page **pages, int *nr);
#ifndef CONFIG_TRANSPARENT_HUGEPAGE
#define pmd_large(pmd)		0
#endif
pte_t *__find_linux_pte_or_hugepte(pgd_t *pgdir, unsigned long ea,
				   bool *is_thp, unsigned *shift);
static inline pte_t *find_linux_pte_or_hugepte(pgd_t *pgdir, unsigned long ea,
					       bool *is_thp, unsigned *shift)
{
	VM_WARN(!arch_irqs_disabled(),
		"%s called with irq enabled\n", __func__);
	return __find_linux_pte_or_hugepte(pgdir, ea, is_thp, shift);
}

unsigned long vmalloc_to_phys(void *vmalloc_addr);

void pgtable_cache_add(unsigned shift, void (*ctor)(void *));
void pgtable_cache_init(void);

#ifdef CONFIG_STRICT_KERNEL_RWX
void mark_initmem_nx(void);
#else
static inline void mark_initmem_nx(void) { }
#endif

#endif /* __ASSEMBLY__ */

#endif /* _ASM_POWERPC_PGTABLE_H */
Commit	Line	Data
047ea784 PM	1	#ifndef _ASM_POWERPC_PGTABLE_H
	2	#define _ASM_POWERPC_PGTABLE_H
	3
9c709f3b	4	#ifndef __ASSEMBLY__
c34a51ce	5	#include <linux/mmdebug.h>
1c98025c	6	#include <linux/mmzone.h>
9c709f3b DG	7	#include <asm/processor.h> /* For TASK_SIZE */
	8	#include <asm/mmu.h>
	9	#include <asm/page.h>
8d30c14c	10
9c709f3b	11	struct mm_struct;
8d30c14c	12
9c709f3b DG	13	#endif /* !__ASSEMBLY__ */
9c709f3b DG	14
3dfcb315 AK	15	#ifdef CONFIG_PPC_BOOK3S
	16	#include <asm/book3s/pgtable.h>
	17	#else
17ed9e31	18	#include <asm/nohash/pgtable.h>
3dfcb315	19	#endif /* !CONFIG_PPC_BOOK3S */
1da177e4	20
1da177e4	21	#ifndef __ASSEMBLY__
64b3d0e8	22
78f1dbde AK	23	#include <asm/tlbflush.h>
78f1dbde AK	24
71087002 BH	25	/* Keep these as a macros to avoid include dependency mess */
	26	#define pte_page(x) pfn_to_page(pte_pfn(x))
	27	#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
	28
9c709f3b DG	29	/*
	30	* ZERO_PAGE is a global shared page that is always zero: used
	31	* for zero-mapped memory areas etc..
	32	*/
	33	extern unsigned long empty_zero_page[];
	34	#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
	35
	36	extern pgd_t swapper_pg_dir[];
	37
1c98025c SW	38	void limit_zone_pfn(enum zone_type zone, unsigned long max_pfn);
1c98025c SW	39	int dma_pfn_limit_to_zone(u64 pfn_limit);
9c709f3b DG	40	extern void paging_init(void);
	41
	42	/*
	43	* kern_addr_valid is intended to indicate whether an address is a valid
	44	* kernel address. Most 32-bit archs define it as always true (like this)
	45	* but most 64-bit archs actually perform a test. What should we do here?
	46	*/
	47	#define kern_addr_valid(addr) (1)
	48
1da177e4	49	#include <asm-generic/pgtable.h>
1e3519f8 BH	50
	51
	52	/*
	53	* This gets called at the end of handling a page fault, when
	54	* the kernel has put a new PTE into the page table for the process.
	55	* We use it to ensure coherency between the i-cache and d-cache
	56	* for the page which has just been mapped in.
	57	* On machines which use an MMU hash table, we use this to put a
	58	* corresponding HPTE into the hash table ahead of time, instead of
	59	* waiting for the inevitable extra hash-table miss exception.
	60	*/
4b3073e1	61	extern void update_mmu_cache(struct vm_area_struct , unsigned long, pte_t );
1e3519f8	62
e2b3d202	63	extern int gup_hugepte(pte_t *ptep, unsigned long sz, unsigned long addr,
b30e7590 AK	64	unsigned long end, int write,
b30e7590 AK	65	struct page *pages, int nr);
074c2eae AK	66	#ifndef CONFIG_TRANSPARENT_HUGEPAGE
074c2eae AK	67	#define pmd_large(pmd) 0
074c2eae	68	#endif
691e95fd	69	pte_t __find_linux_pte_or_hugepte(pgd_t pgdir, unsigned long ea,
891121e6	70	bool is_thp, unsigned shift);
691e95fd	71	static inline pte_t find_linux_pte_or_hugepte(pgd_t pgdir, unsigned long ea,
891121e6	72	bool is_thp, unsigned shift)
691e95fd	73	{
9af3f56b AK	74	VM_WARN(!arch_irqs_disabled(),
9af3f56b AK	75	"%s called with irq enabled\n", __func__);
891121e6	76	return __find_linux_pte_or_hugepte(pgdir, ea, is_thp, shift);
691e95fd	77	}
e9ab1a1c AK	78
	79	unsigned long vmalloc_to_phys(void *vmalloc_addr);
	80
9b081e10 CL	81	void pgtable_cache_add(unsigned shift, void (ctor)(void ));
9b081e10 CL	82	void pgtable_cache_init(void);
029d9252 ME	83
	84	#ifdef CONFIG_STRICT_KERNEL_RWX
	85	void mark_initmem_nx(void);
	86	#else
	87	static inline void mark_initmem_nx(void) { }
	88	#endif
	89
1da177e4 LT	90	#endif /* __ASSEMBLY__ */
1da177e4 LT	91
047ea784	92	#endif /* _ASM_POWERPC_PGTABLE_H */