[linux-2.6-block.git] / arch / microblaze / include / asm / pgtable.h

/*
 * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
 * Copyright (C) 2008-2009 PetaLogix
 * Copyright (C) 2006 Atmark Techno, Inc.
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License. See the file "COPYING" in the main directory of this archive
 * for more details.
 */

#ifndef _ASM_MICROBLAZE_PGTABLE_H
#define _ASM_MICROBLAZE_PGTABLE_H

#include <asm/setup.h>

#ifndef __ASSEMBLY__
extern int mem_init_done;
#endif

#ifndef CONFIG_MMU

#define pgd_present(pgd)	(1) /* pages are always present on non MMU */
#define pgd_none(pgd)		(0)
#define pgd_bad(pgd)		(0)
#define pgd_clear(pgdp)
#define kern_addr_valid(addr)	(1)
#define	pmd_offset(a, b)	((void *) 0)

#define PAGE_NONE		__pgprot(0) /* these mean nothing to non MMU */
#define PAGE_SHARED		__pgprot(0) /* these mean nothing to non MMU */
#define PAGE_COPY		__pgprot(0) /* these mean nothing to non MMU */
#define PAGE_READONLY		__pgprot(0) /* these mean nothing to non MMU */
#define PAGE_KERNEL		__pgprot(0) /* these mean nothing to non MMU */

#define pgprot_noncached(x)	(x)

#define __swp_type(x)		(0)
#define __swp_offset(x)		(0)
#define __swp_entry(typ, off)	((swp_entry_t) { ((typ) | ((off) << 7)) })
#define __pte_to_swp_entry(pte)	((swp_entry_t) { pte_val(pte) })
#define __swp_entry_to_pte(x)	((pte_t) { (x).val })

#define ZERO_PAGE(vaddr)	({ BUG(); NULL; })

#define swapper_pg_dir ((pgd_t *) NULL)

#define pgtable_cache_init()	do {} while (0)

#define arch_enter_lazy_cpu_mode()	do {} while (0)

#define pgprot_noncached_wc(prot)	prot

/*
 * All 32bit addresses are effectively valid for vmalloc...
 * Sort of meaningless for non-VM targets.
 */
#define	VMALLOC_START	0
#define	VMALLOC_END	0xffffffff

#else /* CONFIG_MMU */

#include <asm-generic/4level-fixup.h>

#define __PAGETABLE_PMD_FOLDED

#ifdef __KERNEL__
#ifndef __ASSEMBLY__

#include <linux/sched.h>
#include <linux/threads.h>
#include <asm/processor.h>		/* For TASK_SIZE */
#include <asm/mmu.h>
#include <asm/page.h>

#define FIRST_USER_ADDRESS	0UL

extern unsigned long va_to_phys(unsigned long address);
extern pte_t *va_to_pte(unsigned long address);

/*
 * The following only work if pte_present() is true.
 * Undefined behaviour if not..
 */

static inline int pte_special(pte_t pte)	{ return 0; }

static inline pte_t pte_mkspecial(pte_t pte)	{ return pte; }

/* Start and end of the vmalloc area. */
/* Make sure to map the vmalloc area above the pinned kernel memory area
   of 32Mb.  */
#define VMALLOC_START	(CONFIG_KERNEL_START + CONFIG_LOWMEM_SIZE)
#define VMALLOC_END	ioremap_bot

#endif /* __ASSEMBLY__ */

/*
 * Macro to mark a page protection value as "uncacheable".
 */

#define _PAGE_CACHE_CTL	(_PAGE_GUARDED | _PAGE_NO_CACHE | \
							_PAGE_WRITETHRU)

#define pgprot_noncached(prot) \
			(__pgprot((pgprot_val(prot) & ~_PAGE_CACHE_CTL) | \
					_PAGE_NO_CACHE | _PAGE_GUARDED))

#define pgprot_noncached_wc(prot) \
			 (__pgprot((pgprot_val(prot) & ~_PAGE_CACHE_CTL) | \
							_PAGE_NO_CACHE))

/*
 * The MicroBlaze MMU is identical to the PPC-40x MMU, and uses a hash
 * table containing PTEs, together with a set of 16 segment registers, to
 * define the virtual to physical address mapping.
 *
 * We use the hash table as an extended TLB, i.e. a cache of currently
 * active mappings.  We maintain a two-level page table tree, much
 * like that used by the i386, for the sake of the Linux memory
 * management code.  Low-level assembler code in hashtable.S
 * (procedure hash_page) is responsible for extracting ptes from the
 * tree and putting them into the hash table when necessary, and
 * updating the accessed and modified bits in the page table tree.
 */

/*
 * The MicroBlaze processor has a TLB architecture identical to PPC-40x. The
 * instruction and data sides share a unified, 64-entry, semi-associative
 * TLB which is maintained totally under software control. In addition, the
 * instruction side has a hardware-managed, 2,4, or 8-entry, fully-associative
 * TLB which serves as a first level to the shared TLB. These two TLBs are
 * known as the UTLB and ITLB, respectively (see "mmu.h" for definitions).
 */

/*
 * The normal case is that PTEs are 32-bits and we have a 1-page
 * 1024-entry pgdir pointing to 1-page 1024-entry PTE pages.  -- paulus
 *
 */

/* PMD_SHIFT determines the size of the area mapped by the PTE pages */
#define PMD_SHIFT	(PAGE_SHIFT + PTE_SHIFT)
#define PMD_SIZE	(1UL << PMD_SHIFT)
#define PMD_MASK	(~(PMD_SIZE-1))

/* PGDIR_SHIFT determines what a top-level page table entry can map */
#define PGDIR_SHIFT	PMD_SHIFT
#define PGDIR_SIZE	(1UL << PGDIR_SHIFT)
#define PGDIR_MASK	(~(PGDIR_SIZE-1))

/*
 * entries per page directory level: our page-table tree is two-level, so
 * we don't really have any PMD directory.
 */
#define PTRS_PER_PTE	(1 << PTE_SHIFT)
#define PTRS_PER_PMD	1
#define PTRS_PER_PGD	(1 << (32 - PGDIR_SHIFT))

#define USER_PTRS_PER_PGD	(TASK_SIZE / PGDIR_SIZE)
#define FIRST_USER_PGD_NR	0

#define USER_PGD_PTRS (PAGE_OFFSET >> PGDIR_SHIFT)
#define KERNEL_PGD_PTRS (PTRS_PER_PGD-USER_PGD_PTRS)

#define pte_ERROR(e) \
	printk(KERN_ERR "%s:%d: bad pte "PTE_FMT".\n", \
		__FILE__, __LINE__, pte_val(e))
#define pmd_ERROR(e) \
	printk(KERN_ERR "%s:%d: bad pmd %08lx.\n", \
		__FILE__, __LINE__, pmd_val(e))
#define pgd_ERROR(e) \
	printk(KERN_ERR "%s:%d: bad pgd %08lx.\n", \
		__FILE__, __LINE__, pgd_val(e))

/*
 * Bits in a linux-style PTE.  These match the bits in the
 * (hardware-defined) PTE as closely as possible.
 */

/* There are several potential gotchas here.  The hardware TLBLO
 * field looks like this:
 *
 * 0  1  2  3  4  ... 18 19 20 21 22 23 24 25 26 27 28 29 30 31
 * RPN.....................  0  0 EX WR ZSEL.......  W  I  M  G
 *
 * Where possible we make the Linux PTE bits match up with this
 *
 * - bits 20 and 21 must be cleared, because we use 4k pages (4xx can
 * support down to 1k pages), this is done in the TLBMiss exception
 * handler.
 * - We use only zones 0 (for kernel pages) and 1 (for user pages)
 * of the 16 available.  Bit 24-26 of the TLB are cleared in the TLB
 * miss handler.  Bit 27 is PAGE_USER, thus selecting the correct
 * zone.
 * - PRESENT *must* be in the bottom two bits because swap cache
 * entries use the top 30 bits.  Because 4xx doesn't support SMP
 * anyway, M is irrelevant so we borrow it for PAGE_PRESENT.  Bit 30
 * is cleared in the TLB miss handler before the TLB entry is loaded.
 * - All other bits of the PTE are loaded into TLBLO without
 *  * modification, leaving us only the bits 20, 21, 24, 25, 26, 30 for
 * software PTE bits.  We actually use use bits 21, 24, 25, and
 * 30 respectively for the software bits: ACCESSED, DIRTY, RW, and
 * PRESENT.
 */

/* Definitions for MicroBlaze. */
#define	_PAGE_GUARDED	0x001	/* G: page is guarded from prefetch */
#define _PAGE_PRESENT	0x002	/* software: PTE contains a translation */
#define	_PAGE_NO_CACHE	0x004	/* I: caching is inhibited */
#define	_PAGE_WRITETHRU	0x008	/* W: caching is write-through */
#define	_PAGE_USER	0x010	/* matches one of the zone permission bits */
#define	_PAGE_RW	0x040	/* software: Writes permitted */
#define	_PAGE_DIRTY	0x080	/* software: dirty page */
#define _PAGE_HWWRITE	0x100	/* hardware: Dirty & RW, set in exception */
#define _PAGE_HWEXEC	0x200	/* hardware: EX permission */
#define _PAGE_ACCESSED	0x400	/* software: R: page referenced */
#define _PMD_PRESENT	PAGE_MASK

/*
 * Some bits are unused...
 */
#ifndef _PAGE_HASHPTE
#define _PAGE_HASHPTE	0
#endif
#ifndef _PTE_NONE_MASK
#define _PTE_NONE_MASK	0
#endif
#ifndef _PAGE_SHARED
#define _PAGE_SHARED	0
#endif
#ifndef _PAGE_EXEC
#define _PAGE_EXEC	0
#endif

#define _PAGE_CHG_MASK	(PAGE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY)

/*
 * Note: the _PAGE_COHERENT bit automatically gets set in the hardware
 * PTE if CONFIG_SMP is defined (hash_page does this); there is no need
 * to have it in the Linux PTE, and in fact the bit could be reused for
 * another purpose.  -- paulus.
 */
#define _PAGE_BASE	(_PAGE_PRESENT | _PAGE_ACCESSED)
#define _PAGE_WRENABLE	(_PAGE_RW | _PAGE_DIRTY | _PAGE_HWWRITE)

#define _PAGE_KERNEL \
	(_PAGE_BASE | _PAGE_WRENABLE | _PAGE_SHARED | _PAGE_HWEXEC)

#define _PAGE_IO	(_PAGE_KERNEL | _PAGE_NO_CACHE | _PAGE_GUARDED)

#define PAGE_NONE	__pgprot(_PAGE_BASE)
#define PAGE_READONLY	__pgprot(_PAGE_BASE | _PAGE_USER)
#define PAGE_READONLY_X	__pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_EXEC)
#define PAGE_SHARED	__pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_RW)
#define PAGE_SHARED_X \
		__pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_RW | _PAGE_EXEC)
#define PAGE_COPY	__pgprot(_PAGE_BASE | _PAGE_USER)
#define PAGE_COPY_X	__pgprot(_PAGE_BASE | _PAGE_USER | _PAGE_EXEC)

#define PAGE_KERNEL	__pgprot(_PAGE_KERNEL)
#define PAGE_KERNEL_RO	__pgprot(_PAGE_BASE | _PAGE_SHARED)
#define PAGE_KERNEL_CI	__pgprot(_PAGE_IO)

/*
 * We consider execute permission the same as read.
 * Also, write permissions imply read permissions.
 */
#define __P000	PAGE_NONE
#define __P001	PAGE_READONLY_X
#define __P010	PAGE_COPY
#define __P011	PAGE_COPY_X
#define __P100	PAGE_READONLY
#define __P101	PAGE_READONLY_X
#define __P110	PAGE_COPY
#define __P111	PAGE_COPY_X

#define __S000	PAGE_NONE
#define __S001	PAGE_READONLY_X
#define __S010	PAGE_SHARED
#define __S011	PAGE_SHARED_X
#define __S100	PAGE_READONLY
#define __S101	PAGE_READONLY_X
#define __S110	PAGE_SHARED
#define __S111	PAGE_SHARED_X

#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[1024];
#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))

#endif /* __ASSEMBLY__ */

#define pte_none(pte)		((pte_val(pte) & ~_PTE_NONE_MASK) == 0)
#define pte_present(pte)	(pte_val(pte) & _PAGE_PRESENT)
#define pte_clear(mm, addr, ptep) \
	do { set_pte_at((mm), (addr), (ptep), __pte(0)); } while (0)

#define pmd_none(pmd)		(!pmd_val(pmd))
#define	pmd_bad(pmd)		((pmd_val(pmd) & _PMD_PRESENT) == 0)
#define	pmd_present(pmd)	((pmd_val(pmd) & _PMD_PRESENT) != 0)
#define	pmd_clear(pmdp)		do { pmd_val(*(pmdp)) = 0; } while (0)

#define pte_page(x)		(mem_map + (unsigned long) \
				((pte_val(x) - memory_start) >> PAGE_SHIFT))
#define PFN_SHIFT_OFFSET	(PAGE_SHIFT)

#define pte_pfn(x)		(pte_val(x) >> PFN_SHIFT_OFFSET)

#define pfn_pte(pfn, prot) \
	__pte(((pte_basic_t)(pfn) << PFN_SHIFT_OFFSET) | pgprot_val(prot))

#ifndef __ASSEMBLY__
/*
 * The "pgd_xxx()" functions here are trivial for a folded two-level
 * setup: the pgd is never bad, and a pmd always exists (as it's folded
 * into the pgd entry)
 */
static inline int pgd_none(pgd_t pgd)		{ return 0; }
static inline int pgd_bad(pgd_t pgd)		{ return 0; }
static inline int pgd_present(pgd_t pgd)	{ return 1; }
#define pgd_clear(xp)				do { } while (0)
#define pgd_page(pgd) \
	((unsigned long) __va(pgd_val(pgd) & PAGE_MASK))

/*
 * The following only work if pte_present() is true.
 * Undefined behaviour if not..
 */
static inline int pte_read(pte_t pte)  { return pte_val(pte) & _PAGE_USER; }
static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_RW; }
static inline int pte_exec(pte_t pte)  { return pte_val(pte) & _PAGE_EXEC; }
static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY; }
static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; }

static inline void pte_uncache(pte_t pte) { pte_val(pte) |= _PAGE_NO_CACHE; }
static inline void pte_cache(pte_t pte)   { pte_val(pte) &= ~_PAGE_NO_CACHE; }

static inline pte_t pte_rdprotect(pte_t pte) \
		{ pte_val(pte) &= ~_PAGE_USER; return pte; }
static inline pte_t pte_wrprotect(pte_t pte) \
	{ pte_val(pte) &= ~(_PAGE_RW | _PAGE_HWWRITE); return pte; }
static inline pte_t pte_exprotect(pte_t pte) \
	{ pte_val(pte) &= ~_PAGE_EXEC; return pte; }
static inline pte_t pte_mkclean(pte_t pte) \
	{ pte_val(pte) &= ~(_PAGE_DIRTY | _PAGE_HWWRITE); return pte; }
static inline pte_t pte_mkold(pte_t pte) \
	{ pte_val(pte) &= ~_PAGE_ACCESSED; return pte; }

static inline pte_t pte_mkread(pte_t pte) \
	{ pte_val(pte) |= _PAGE_USER; return pte; }
static inline pte_t pte_mkexec(pte_t pte) \
	{ pte_val(pte) |= _PAGE_USER | _PAGE_EXEC; return pte; }
static inline pte_t pte_mkwrite(pte_t pte) \
	{ pte_val(pte) |= _PAGE_RW; return pte; }
static inline pte_t pte_mkdirty(pte_t pte) \
	{ pte_val(pte) |= _PAGE_DIRTY; return pte; }
static inline pte_t pte_mkyoung(pte_t pte) \
	{ pte_val(pte) |= _PAGE_ACCESSED; return pte; }

/*
 * Conversion functions: convert a page and protection to a page entry,
 * and a page entry and page directory to the page they refer to.
 */

static inline pte_t mk_pte_phys(phys_addr_t physpage, pgprot_t pgprot)
{
	pte_t pte;
	pte_val(pte) = physpage | pgprot_val(pgprot);
	return pte;
}

#define mk_pte(page, pgprot) \
({									   \
	pte_t pte;							   \
	pte_val(pte) = (((page - mem_map) << PAGE_SHIFT) + memory_start) |  \
			pgprot_val(pgprot);				   \
	pte;								   \
})

static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
{
	pte_val(pte) = (pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot);
	return pte;
}

/*
 * Atomic PTE updates.
 *
 * pte_update clears and sets bit atomically, and returns
 * the old pte value.
 * The ((unsigned long)(p+1) - 4) hack is to get to the least-significant
 * 32 bits of the PTE regardless of whether PTEs are 32 or 64 bits.
 */
static inline unsigned long pte_update(pte_t *p, unsigned long clr,
				unsigned long set)
{
	unsigned long flags, old, tmp;

	raw_local_irq_save(flags);

	__asm__ __volatile__(	"lw	%0, %2, r0	\n"
				"andn	%1, %0, %3	\n"
				"or	%1, %1, %4	\n"
				"sw	%1, %2, r0	\n"
			: "=&r" (old), "=&r" (tmp)
			: "r" ((unsigned long)(p + 1) - 4), "r" (clr), "r" (set)
			: "cc");

	raw_local_irq_restore(flags);

	return old;
}

/*
 * set_pte stores a linux PTE into the linux page table.
 */
static inline void set_pte(struct mm_struct *mm, unsigned long addr,
		pte_t *ptep, pte_t pte)
{
	*ptep = pte;
}

static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
		pte_t *ptep, pte_t pte)
{
	*ptep = pte;
}

#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
static inline int ptep_test_and_clear_young(struct vm_area_struct *vma,
		unsigned long address, pte_t *ptep)
{
	return (pte_update(ptep, _PAGE_ACCESSED, 0) & _PAGE_ACCESSED) != 0;
}

static inline int ptep_test_and_clear_dirty(struct mm_struct *mm,
		unsigned long addr, pte_t *ptep)
{
	return (pte_update(ptep, \
		(_PAGE_DIRTY | _PAGE_HWWRITE), 0) & _PAGE_DIRTY) != 0;
}

#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
static inline pte_t ptep_get_and_clear(struct mm_struct *mm,
		unsigned long addr, pte_t *ptep)
{
	return __pte(pte_update(ptep, ~_PAGE_HASHPTE, 0));
}

/*static inline void ptep_set_wrprotect(struct mm_struct *mm,
		unsigned long addr, pte_t *ptep)
{
	pte_update(ptep, (_PAGE_RW | _PAGE_HWWRITE), 0);
}*/

static inline void ptep_mkdirty(struct mm_struct *mm,
		unsigned long addr, pte_t *ptep)
{
	pte_update(ptep, 0, _PAGE_DIRTY);
}

/*#define pte_same(A,B)	(((pte_val(A) ^ pte_val(B)) & ~_PAGE_HASHPTE) == 0)*/

/* Convert pmd entry to page */
/* our pmd entry is an effective address of pte table*/
/* returns effective address of the pmd entry*/
#define pmd_page_kernel(pmd)	((unsigned long) (pmd_val(pmd) & PAGE_MASK))

/* returns struct *page of the pmd entry*/
#define pmd_page(pmd)	(pfn_to_page(__pa(pmd_val(pmd)) >> PAGE_SHIFT))

/* to find an entry in a kernel page-table-directory */
#define pgd_offset_k(address) pgd_offset(&init_mm, address)

/* to find an entry in a page-table-directory */
#define pgd_index(address)	 ((address) >> PGDIR_SHIFT)
#define pgd_offset(mm, address)	 ((mm)->pgd + pgd_index(address))

/* Find an entry in the second-level page table.. */
static inline pmd_t *pmd_offset(pgd_t *dir, unsigned long address)
{
	return (pmd_t *) dir;
}

/* Find an entry in the third-level page table.. */
#define pte_index(address)		\
	(((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
#define pte_offset_kernel(dir, addr)	\
	((pte_t *) pmd_page_kernel(*(dir)) + pte_index(addr))
#define pte_offset_map(dir, addr)		\
	((pte_t *) kmap_atomic(pmd_page(*(dir))) + pte_index(addr))

#define pte_unmap(pte)		kunmap_atomic(pte)

extern pgd_t swapper_pg_dir[PTRS_PER_PGD];

/*
 * Encode and decode a swap entry.
 * Note that the bits we use in a PTE for representing a swap entry
 * must not include the _PAGE_PRESENT bit, or the _PAGE_HASHPTE bit
 * (if used).  -- paulus
 */
#define __swp_type(entry)		((entry).val & 0x3f)
#define __swp_offset(entry)	((entry).val >> 6)
#define __swp_entry(type, offset) \
		((swp_entry_t) { (type) | ((offset) << 6) })
#define __pte_to_swp_entry(pte)	((swp_entry_t) { pte_val(pte) >> 2 })
#define __swp_entry_to_pte(x)	((pte_t) { (x).val << 2 })

extern unsigned long iopa(unsigned long addr);

/* Values for nocacheflag and cmode */
/* These are not used by the APUS kernel_map, but prevents
 * compilation errors.
 */
#define	IOMAP_FULL_CACHING	0
#define	IOMAP_NOCACHE_SER	1
#define	IOMAP_NOCACHE_NONSER	2
#define	IOMAP_NO_COPYBACK	3

/* Needs to be defined here and not in linux/mm.h, as it is arch dependent */
#define kern_addr_valid(addr)	(1)

/*
 * No page table caches to initialise
 */
#define pgtable_cache_init()	do { } while (0)

void do_page_fault(struct pt_regs *regs, unsigned long address,
		   unsigned long error_code);

void mapin_ram(void);
int map_page(unsigned long va, phys_addr_t pa, int flags);

extern int mem_init_done;

asmlinkage void __init mmu_init(void);

void __init *early_get_page(void);

#endif /* __ASSEMBLY__ */
#endif /* __KERNEL__ */

#endif /* CONFIG_MMU */

#ifndef __ASSEMBLY__
#include <asm-generic/pgtable.h>

extern unsigned long ioremap_bot, ioremap_base;

void *consistent_alloc(gfp_t gfp, size_t size, dma_addr_t *dma_handle);
void consistent_free(size_t size, void *vaddr);
void consistent_sync(void *vaddr, size_t size, int direction);
void consistent_sync_page(struct page *page, unsigned long offset,
	size_t size, int direction);
unsigned long consistent_virt_to_pfn(void *vaddr);

void setup_memory(void);
#endif /* __ASSEMBLY__ */

#endif /* _ASM_MICROBLAZE_PGTABLE_H */
Commit	Line	Data
6a3cece5	1	/*
15902bf6 MS	2	* Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
15902bf6 MS	3	* Copyright (C) 2008-2009 PetaLogix
6a3cece5 MS	4	* Copyright (C) 2006 Atmark Techno, Inc.
	5	*
	6	* This file is subject to the terms and conditions of the GNU General Public
	7	* License. See the file "COPYING" in the main directory of this archive
	8	* for more details.
	9	*/
	10
	11	#ifndef _ASM_MICROBLAZE_PGTABLE_H
	12	#define _ASM_MICROBLAZE_PGTABLE_H
	13
	14	#include <asm/setup.h>
	15
79bf3a13 MS	16	#ifndef __ASSEMBLY__
	17	extern int mem_init_done;
	18	#endif
	19
15902bf6 MS	20	#ifndef CONFIG_MMU
15902bf6 MS	21
6a3cece5 MS	22	#define pgd_present(pgd) (1) /* pages are always present on non MMU */
	23	#define pgd_none(pgd) (0)
	24	#define pgd_bad(pgd) (0)
	25	#define pgd_clear(pgdp)
	26	#define kern_addr_valid(addr) (1)
	27	#define pmd_offset(a, b) ((void *) 0)
	28
	29	#define PAGE_NONE __pgprot(0) /* these mean nothing to non MMU */
	30	#define PAGE_SHARED __pgprot(0) /* these mean nothing to non MMU */
	31	#define PAGE_COPY __pgprot(0) /* these mean nothing to non MMU */
	32	#define PAGE_READONLY __pgprot(0) /* these mean nothing to non MMU */
	33	#define PAGE_KERNEL __pgprot(0) /* these mean nothing to non MMU */
	34
0c60155e AB	35	#define pgprot_noncached(x) (x)
0c60155e AB	36
6a3cece5 MS	37	#define __swp_type(x) (0)
	38	#define __swp_offset(x) (0)
	39	#define __swp_entry(typ, off) ((swp_entry_t) { ((typ) \| ((off) << 7)) })
	40	#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
	41	#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
	42
6a3cece5 MS	43	#define ZERO_PAGE(vaddr) ({ BUG(); NULL; })
	44
	45	#define swapper_pg_dir ((pgd_t *) NULL)
	46
	47	#define pgtable_cache_init() do {} while (0)
	48
	49	#define arch_enter_lazy_cpu_mode() do {} while (0)
	50
79bf3a13 MS	51	#define pgprot_noncached_wc(prot) prot
79bf3a13 MS	52
099a2f42 MS	53	/*
	54	* All 32bit addresses are effectively valid for vmalloc...
	55	* Sort of meaningless for non-VM targets.
	56	*/
	57	#define VMALLOC_START 0
	58	#define VMALLOC_END 0xffffffff
	59
15902bf6 MS	60	#else /* CONFIG_MMU */
	61
	62	#include <asm-generic/4level-fixup.h>
	63
3ae3ad4e KS	64	#define __PAGETABLE_PMD_FOLDED
3ae3ad4e KS	65
15902bf6 MS	66	#ifdef __KERNEL__
	67	#ifndef __ASSEMBLY__
	68
	69	#include <linux/sched.h>
	70	#include <linux/threads.h>
	71	#include <asm/processor.h> /* For TASK_SIZE */
	72	#include <asm/mmu.h>
	73	#include <asm/page.h>
	74
d016bf7e	75	#define FIRST_USER_ADDRESS 0UL
15902bf6 MS	76
	77	extern unsigned long va_to_phys(unsigned long address);
	78	extern pte_t *va_to_pte(unsigned long address);
15902bf6 MS	79
	80	/*
	81	* The following only work if pte_present() is true.
	82	* Undefined behaviour if not..
	83	*/
	84
	85	static inline int pte_special(pte_t pte) { return 0; }
	86
	87	static inline pte_t pte_mkspecial(pte_t pte) { return pte; }
	88
	89	/* Start and end of the vmalloc area. */
	90	/* Make sure to map the vmalloc area above the pinned kernel memory area
	91	of 32Mb. */
83a92529	92	#define VMALLOC_START (CONFIG_KERNEL_START + CONFIG_LOWMEM_SIZE)
15902bf6	93	#define VMALLOC_END ioremap_bot
15902bf6 MS	94
	95	#endif /* __ASSEMBLY__ */
	96
a6475c13 MS	97	/*
	98	* Macro to mark a page protection value as "uncacheable".
	99	*/
	100
	101	#define _PAGE_CACHE_CTL (_PAGE_GUARDED \| _PAGE_NO_CACHE \| \
	102	_PAGE_WRITETHRU)
	103
	104	#define pgprot_noncached(prot) \
	105	(__pgprot((pgprot_val(prot) & ~_PAGE_CACHE_CTL) \| \
	106	_PAGE_NO_CACHE \| _PAGE_GUARDED))
	107
	108	#define pgprot_noncached_wc(prot) \
	109	(__pgprot((pgprot_val(prot) & ~_PAGE_CACHE_CTL) \| \
	110	_PAGE_NO_CACHE))
	111
15902bf6 MS	112	/*
	113	* The MicroBlaze MMU is identical to the PPC-40x MMU, and uses a hash
	114	* table containing PTEs, together with a set of 16 segment registers, to
	115	* define the virtual to physical address mapping.
	116	*
	117	* We use the hash table as an extended TLB, i.e. a cache of currently
	118	* active mappings. We maintain a two-level page table tree, much
	119	* like that used by the i386, for the sake of the Linux memory
	120	* management code. Low-level assembler code in hashtable.S
	121	* (procedure hash_page) is responsible for extracting ptes from the
	122	* tree and putting them into the hash table when necessary, and
	123	* updating the accessed and modified bits in the page table tree.
	124	*/
	125
	126	/*
	127	* The MicroBlaze processor has a TLB architecture identical to PPC-40x. The
	128	* instruction and data sides share a unified, 64-entry, semi-associative
	129	* TLB which is maintained totally under software control. In addition, the
	130	* instruction side has a hardware-managed, 2,4, or 8-entry, fully-associative
	131	* TLB which serves as a first level to the shared TLB. These two TLBs are
	132	* known as the UTLB and ITLB, respectively (see "mmu.h" for definitions).
	133	*/
	134
	135	/*
	136	* The normal case is that PTEs are 32-bits and we have a 1-page
	137	* 1024-entry pgdir pointing to 1-page 1024-entry PTE pages. -- paulus
	138	*
	139	*/
	140
	141	/* PMD_SHIFT determines the size of the area mapped by the PTE pages */
	142	#define PMD_SHIFT (PAGE_SHIFT + PTE_SHIFT)
	143	#define PMD_SIZE (1UL << PMD_SHIFT)
	144	#define PMD_MASK (~(PMD_SIZE-1))
	145
	146	/* PGDIR_SHIFT determines what a top-level page table entry can map */
	147	#define PGDIR_SHIFT PMD_SHIFT
	148	#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
	149	#define PGDIR_MASK (~(PGDIR_SIZE-1))
	150
	151	/*
	152	* entries per page directory level: our page-table tree is two-level, so
	153	* we don't really have any PMD directory.
	154	*/
	155	#define PTRS_PER_PTE (1 << PTE_SHIFT)
	156	#define PTRS_PER_PMD 1
	157	#define PTRS_PER_PGD (1 << (32 - PGDIR_SHIFT))
	158
	159	#define USER_PTRS_PER_PGD (TASK_SIZE / PGDIR_SIZE)
	160	#define FIRST_USER_PGD_NR 0
	161
	162	#define USER_PGD_PTRS (PAGE_OFFSET >> PGDIR_SHIFT)
	163	#define KERNEL_PGD_PTRS (PTRS_PER_PGD-USER_PGD_PTRS)
	164
	165	#define pte_ERROR(e) \
	166	printk(KERN_ERR "%s:%d: bad pte "PTE_FMT".\n", \
	167	__FILE__, __LINE__, pte_val(e))
	168	#define pmd_ERROR(e) \
	169	printk(KERN_ERR "%s:%d: bad pmd %08lx.\n", \
	170	__FILE__, __LINE__, pmd_val(e))
	171	#define pgd_ERROR(e) \
	172	printk(KERN_ERR "%s:%d: bad pgd %08lx.\n", \
	173	__FILE__, __LINE__, pgd_val(e))
	174
	175	/*
176	* Bits in a linux-style PTE. These match the bits in the
177	* (hardware-defined) PTE as closely as possible.
178	*/
179
180	/* There are several potential gotchas here. The hardware TLBLO
181	* field looks like this:
182	*
183	* 0 1 2 3 4 ... 18 19 20 21 22 23 24 25 26 27 28 29 30 31
184	* RPN..................... 0 0 EX WR ZSEL....... W I M G
185	*
186	* Where possible we make the Linux PTE bits match up with this
187	*
188	* - bits 20 and 21 must be cleared, because we use 4k pages (4xx can
189	* support down to 1k pages), this is done in the TLBMiss exception
190	* handler.
191	* - We use only zones 0 (for kernel pages) and 1 (for user pages)
192	* of the 16 available. Bit 24-26 of the TLB are cleared in the TLB
193	* miss handler. Bit 27 is PAGE_USER, thus selecting the correct
194	* zone.
195	* - PRESENT must be in the bottom two bits because swap cache
196	* entries use the top 30 bits. Because 4xx doesn't support SMP
197	* anyway, M is irrelevant so we borrow it for PAGE_PRESENT. Bit 30
198	* is cleared in the TLB miss handler before the TLB entry is loaded.
199	* - All other bits of the PTE are loaded into TLBLO without
200	* * modification, leaving us only the bits 20, 21, 24, 25, 26, 30 for
201	* software PTE bits. We actually use use bits 21, 24, 25, and
202	* 30 respectively for the software bits: ACCESSED, DIRTY, RW, and
203	* PRESENT.
204	*/
205
206	/* Definitions for MicroBlaze. */
207	#define _PAGE_GUARDED 0x001 /* G: page is guarded from prefetch */
208	#define _PAGE_PRESENT 0x002 /* software: PTE contains a translation */
209	#define _PAGE_NO_CACHE 0x004 /* I: caching is inhibited */
210	#define _PAGE_WRITETHRU 0x008 /* W: caching is write-through */
211	#define _PAGE_USER 0x010 /* matches one of the zone permission bits */
212	#define _PAGE_RW 0x040 /* software: Writes permitted */
213	#define _PAGE_DIRTY 0x080 /* software: dirty page */
214	#define _PAGE_HWWRITE 0x100 /* hardware: Dirty & RW, set in exception */
215	#define _PAGE_HWEXEC 0x200 /* hardware: EX permission */
216	#define _PAGE_ACCESSED 0x400 /* software: R: page referenced */
217	#define _PMD_PRESENT PAGE_MASK
218
219	/*
220	* Some bits are unused...
221	*/
222	#ifndef _PAGE_HASHPTE
223	#define _PAGE_HASHPTE 0
224	#endif
225	#ifndef _PTE_NONE_MASK
226	#define _PTE_NONE_MASK 0
227	#endif
228	#ifndef _PAGE_SHARED
229	#define _PAGE_SHARED 0
230	#endif
15902bf6 MS	231	#ifndef _PAGE_EXEC
	232	#define _PAGE_EXEC 0
	233	#endif
	234
	235	#define _PAGE_CHG_MASK (PAGE_MASK \| _PAGE_ACCESSED \| _PAGE_DIRTY)
	236
	237	/*
	238	* Note: the _PAGE_COHERENT bit automatically gets set in the hardware
	239	* PTE if CONFIG_SMP is defined (hash_page does this); there is no need
	240	* to have it in the Linux PTE, and in fact the bit could be reused for
	241	* another purpose. -- paulus.
	242	*/
	243	#define _PAGE_BASE (_PAGE_PRESENT \| _PAGE_ACCESSED)
	244	#define _PAGE_WRENABLE (_PAGE_RW \| _PAGE_DIRTY \| _PAGE_HWWRITE)
	245
	246	#define _PAGE_KERNEL \
	247	(_PAGE_BASE \| _PAGE_WRENABLE \| _PAGE_SHARED \| _PAGE_HWEXEC)
	248
	249	#define _PAGE_IO (_PAGE_KERNEL \| _PAGE_NO_CACHE \| _PAGE_GUARDED)
	250
	251	#define PAGE_NONE __pgprot(_PAGE_BASE)
	252	#define PAGE_READONLY __pgprot(_PAGE_BASE \| _PAGE_USER)
	253	#define PAGE_READONLY_X __pgprot(_PAGE_BASE \| _PAGE_USER \| _PAGE_EXEC)
	254	#define PAGE_SHARED __pgprot(_PAGE_BASE \| _PAGE_USER \| _PAGE_RW)
	255	#define PAGE_SHARED_X \
	256	__pgprot(_PAGE_BASE \| _PAGE_USER \| _PAGE_RW \| _PAGE_EXEC)
	257	#define PAGE_COPY __pgprot(_PAGE_BASE \| _PAGE_USER)
	258	#define PAGE_COPY_X __pgprot(_PAGE_BASE \| _PAGE_USER \| _PAGE_EXEC)
	259
	260	#define PAGE_KERNEL __pgprot(_PAGE_KERNEL)
	261	#define PAGE_KERNEL_RO __pgprot(_PAGE_BASE \| _PAGE_SHARED)
	262	#define PAGE_KERNEL_CI __pgprot(_PAGE_IO)
	263
	264	/*
	265	* We consider execute permission the same as read.
	266	* Also, write permissions imply read permissions.
	267	*/
	268	#define __P000 PAGE_NONE
	269	#define __P001 PAGE_READONLY_X
	270	#define __P010 PAGE_COPY
	271	#define __P011 PAGE_COPY_X
	272	#define __P100 PAGE_READONLY
	273	#define __P101 PAGE_READONLY_X
	274	#define __P110 PAGE_COPY
	275	#define __P111 PAGE_COPY_X
	276
	277	#define __S000 PAGE_NONE
	278	#define __S001 PAGE_READONLY_X
	279	#define __S010 PAGE_SHARED
	280	#define __S011 PAGE_SHARED_X
	281	#define __S100 PAGE_READONLY
	282	#define __S101 PAGE_READONLY_X
	283	#define __S110 PAGE_SHARED
	284	#define __S111 PAGE_SHARED_X
	285
	286	#ifndef __ASSEMBLY__
	287	/*
	288	* ZERO_PAGE is a global shared page that is always zero: used
	289	* for zero-mapped memory areas etc..
	290	*/
	291	extern unsigned long empty_zero_page[1024];
	292	#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
	293
	294	#endif /* __ASSEMBLY__ */
295
296	#define pte_none(pte) ((pte_val(pte) & ~_PTE_NONE_MASK) == 0)
297	#define pte_present(pte) (pte_val(pte) & _PAGE_PRESENT)
298	#define pte_clear(mm, addr, ptep) \
299	do { set_pte_at((mm), (addr), (ptep), __pte(0)); } while (0)
300
301	#define pmd_none(pmd) (!pmd_val(pmd))
302	#define pmd_bad(pmd) ((pmd_val(pmd) & _PMD_PRESENT) == 0)
303	#define pmd_present(pmd) ((pmd_val(pmd) & _PMD_PRESENT) != 0)
304	#define pmd_clear(pmdp) do { pmd_val(*(pmdp)) = 0; } while (0)
305
306	#define pte_page(x) (mem_map + (unsigned long) \
307	((pte_val(x) - memory_start) >> PAGE_SHIFT))
308	#define PFN_SHIFT_OFFSET (PAGE_SHIFT)
309
310	#define pte_pfn(x) (pte_val(x) >> PFN_SHIFT_OFFSET)
311
312	#define pfn_pte(pfn, prot) \
313	__pte(((pte_basic_t)(pfn) << PFN_SHIFT_OFFSET) \| pgprot_val(prot))
314
315	#ifndef __ASSEMBLY__
316	/*
317	* The "pgd_xxx()" functions here are trivial for a folded two-level
318	* setup: the pgd is never bad, and a pmd always exists (as it's folded
319	* into the pgd entry)
320	*/
321	static inline int pgd_none(pgd_t pgd) { return 0; }
322	static inline int pgd_bad(pgd_t pgd) { return 0; }
323	static inline int pgd_present(pgd_t pgd) { return 1; }
324	#define pgd_clear(xp) do { } while (0)
325	#define pgd_page(pgd) \
326	((unsigned long) __va(pgd_val(pgd) & PAGE_MASK))
327
328	/*
329	* The following only work if pte_present() is true.
330	* Undefined behaviour if not..
331	*/
332	static inline int pte_read(pte_t pte) { return pte_val(pte) & _PAGE_USER; }
333	static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_RW; }
334	static inline int pte_exec(pte_t pte) { return pte_val(pte) & _PAGE_EXEC; }
335	static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY; }
336	static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; }
15902bf6 MS	337
	338	static inline void pte_uncache(pte_t pte) { pte_val(pte) \|= _PAGE_NO_CACHE; }
	339	static inline void pte_cache(pte_t pte) { pte_val(pte) &= ~_PAGE_NO_CACHE; }
	340
	341	static inline pte_t pte_rdprotect(pte_t pte) \
	342	{ pte_val(pte) &= ~_PAGE_USER; return pte; }
	343	static inline pte_t pte_wrprotect(pte_t pte) \
	344	{ pte_val(pte) &= ~(_PAGE_RW \| _PAGE_HWWRITE); return pte; }
	345	static inline pte_t pte_exprotect(pte_t pte) \
	346	{ pte_val(pte) &= ~_PAGE_EXEC; return pte; }
	347	static inline pte_t pte_mkclean(pte_t pte) \
	348	{ pte_val(pte) &= ~(_PAGE_DIRTY \| _PAGE_HWWRITE); return pte; }
	349	static inline pte_t pte_mkold(pte_t pte) \
	350	{ pte_val(pte) &= ~_PAGE_ACCESSED; return pte; }
	351
	352	static inline pte_t pte_mkread(pte_t pte) \
	353	{ pte_val(pte) \|= _PAGE_USER; return pte; }
	354	static inline pte_t pte_mkexec(pte_t pte) \
	355	{ pte_val(pte) \|= _PAGE_USER \| _PAGE_EXEC; return pte; }
	356	static inline pte_t pte_mkwrite(pte_t pte) \
	357	{ pte_val(pte) \|= _PAGE_RW; return pte; }
	358	static inline pte_t pte_mkdirty(pte_t pte) \
	359	{ pte_val(pte) \|= _PAGE_DIRTY; return pte; }
	360	static inline pte_t pte_mkyoung(pte_t pte) \
	361	{ pte_val(pte) \|= _PAGE_ACCESSED; return pte; }
	362
	363	/*
	364	* Conversion functions: convert a page and protection to a page entry,
	365	* and a page entry and page directory to the page they refer to.
	366	*/
	367
	368	static inline pte_t mk_pte_phys(phys_addr_t physpage, pgprot_t pgprot)
	369	{
	370	pte_t pte;
	371	pte_val(pte) = physpage \| pgprot_val(pgprot);
	372	return pte;
	373	}
	374
	375	#define mk_pte(page, pgprot) \
	376	({ \
	377	pte_t pte; \
	378	pte_val(pte) = (((page - mem_map) << PAGE_SHIFT) + memory_start) \| \
	379	pgprot_val(pgprot); \
	380	pte; \
	381	})
	382
	383	static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
	384	{
	385	pte_val(pte) = (pte_val(pte) & _PAGE_CHG_MASK) \| pgprot_val(newprot);
	386	return pte;
	387	}
	388
	389	/*
	390	* Atomic PTE updates.
	391	*
	392	* pte_update clears and sets bit atomically, and returns
	393	* the old pte value.
	394	* The ((unsigned long)(p+1) - 4) hack is to get to the least-significant
	395	* 32 bits of the PTE regardless of whether PTEs are 32 or 64 bits.
	396	*/
	397	static inline unsigned long pte_update(pte_t *p, unsigned long clr,
	398	unsigned long set)
	399	{
1f80a67d MS	400	unsigned long flags, old, tmp;
	401
	402	raw_local_irq_save(flags);
	403
	404	__asm__ __volatile__( "lw %0, %2, r0 \n"
	405	"andn %1, %0, %3 \n"
	406	"or %1, %1, %4 \n"
	407	"sw %1, %2, r0 \n"
	408	: "=&r" (old), "=&r" (tmp)
	409	: "r" ((unsigned long)(p + 1) - 4), "r" (clr), "r" (set)
	410	: "cc");
	411
	412	raw_local_irq_restore(flags);
15902bf6 MS	413
	414	return old;
	415	}
	416
	417	/*
	418	* set_pte stores a linux PTE into the linux page table.
	419	*/
	420	static inline void set_pte(struct mm_struct *mm, unsigned long addr,
	421	pte_t *ptep, pte_t pte)
	422	{
	423	*ptep = pte;
	424	}
	425
	426	static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
	427	pte_t *ptep, pte_t pte)
	428	{
	429	*ptep = pte;
	430	}
	431
658b368d MS	432	#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
	433	static inline int ptep_test_and_clear_young(struct vm_area_struct *vma,
	434	unsigned long address, pte_t *ptep)
15902bf6 MS	435	{
	436	return (pte_update(ptep, _PAGE_ACCESSED, 0) & _PAGE_ACCESSED) != 0;
	437	}
	438
	439	static inline int ptep_test_and_clear_dirty(struct mm_struct *mm,
	440	unsigned long addr, pte_t *ptep)
	441	{
	442	return (pte_update(ptep, \
	443	(_PAGE_DIRTY \| _PAGE_HWWRITE), 0) & _PAGE_DIRTY) != 0;
	444	}
	445
658b368d	446	#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
15902bf6 MS	447	static inline pte_t ptep_get_and_clear(struct mm_struct *mm,
	448	unsigned long addr, pte_t *ptep)
	449	{
	450	return __pte(pte_update(ptep, ~_PAGE_HASHPTE, 0));
	451	}
	452
	453	/static inline void ptep_set_wrprotect(struct mm_struct mm,
	454	unsigned long addr, pte_t *ptep)
	455	{
	456	pte_update(ptep, (_PAGE_RW \| _PAGE_HWWRITE), 0);
	457	}*/
	458
	459	static inline void ptep_mkdirty(struct mm_struct *mm,
	460	unsigned long addr, pte_t *ptep)
	461	{
	462	pte_update(ptep, 0, _PAGE_DIRTY);
	463	}
	464
	465	/#define pte_same(A,B) (((pte_val(A) ^ pte_val(B)) & ~_PAGE_HASHPTE) == 0)/
	466
	467	/* Convert pmd entry to page */
	468	/* our pmd entry is an effective address of pte table*/
	469	/* returns effective address of the pmd entry*/
	470	#define pmd_page_kernel(pmd) ((unsigned long) (pmd_val(pmd) & PAGE_MASK))
	471
	472	/* returns struct page of the pmd entry/
	473	#define pmd_page(pmd) (pfn_to_page(__pa(pmd_val(pmd)) >> PAGE_SHIFT))
	474
	475	/* to find an entry in a kernel page-table-directory */
	476	#define pgd_offset_k(address) pgd_offset(&init_mm, address)
	477
	478	/* to find an entry in a page-table-directory */
	479	#define pgd_index(address) ((address) >> PGDIR_SHIFT)
	480	#define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
	481
	482	/* Find an entry in the second-level page table.. */
	483	static inline pmd_t pmd_offset(pgd_t dir, unsigned long address)
	484	{
	485	return (pmd_t *) dir;
	486	}
	487
	488	/* Find an entry in the third-level page table.. */
	489	#define pte_index(address) \
	490	(((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
	491	#define pte_offset_kernel(dir, addr) \
	492	((pte_t ) pmd_page_kernel((dir)) + pte_index(addr))
	493	#define pte_offset_map(dir, addr) \
ece0e2b6	494	((pte_t ) kmap_atomic(pmd_page((dir))) + pte_index(addr))
15902bf6	495
ece0e2b6	496	#define pte_unmap(pte) kunmap_atomic(pte)
15902bf6	497
15902bf6 MS	498	extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
15902bf6 MS	499
15902bf6 MS	500	/*
	501	* Encode and decode a swap entry.
	502	* Note that the bits we use in a PTE for representing a swap entry
	503	* must not include the _PAGE_PRESENT bit, or the _PAGE_HASHPTE bit
	504	* (if used). -- paulus
	505	*/
	506	#define __swp_type(entry) ((entry).val & 0x3f)
	507	#define __swp_offset(entry) ((entry).val >> 6)
	508	#define __swp_entry(type, offset) \
	509	((swp_entry_t) { (type) \| ((offset) << 6) })
	510	#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) >> 2 })
	511	#define __swp_entry_to_pte(x) ((pte_t) { (x).val << 2 })
	512
15902bf6	513	extern unsigned long iopa(unsigned long addr);
15902bf6 MS	514
	515	/* Values for nocacheflag and cmode */
	516	/* These are not used by the APUS kernel_map, but prevents
	517	* compilation errors.
	518	*/
	519	#define IOMAP_FULL_CACHING 0
	520	#define IOMAP_NOCACHE_SER 1
	521	#define IOMAP_NOCACHE_NONSER 2
	522	#define IOMAP_NO_COPYBACK 3
	523
15902bf6 MS	524	/* Needs to be defined here and not in linux/mm.h, as it is arch dependent */
	525	#define kern_addr_valid(addr) (1)
	526
15902bf6 MS	527	/*
	528	* No page table caches to initialise
	529	*/
	530	#define pgtable_cache_init() do { } while (0)
	531
	532	void do_page_fault(struct pt_regs *regs, unsigned long address,
	533	unsigned long error_code);
	534
15902bf6 MS	535	void mapin_ram(void);
	536	int map_page(unsigned long va, phys_addr_t pa, int flags);
	537
	538	extern int mem_init_done;
15902bf6 MS	539
	540	asmlinkage void __init mmu_init(void);
	541
	542	void __init *early_get_page(void);
	543
15902bf6 MS	544	#endif /* __ASSEMBLY__ */
	545	#endif /* __KERNEL__ */
	546
	547	#endif /* CONFIG_MMU */
	548
6a3cece5 MS	549	#ifndef __ASSEMBLY__
	550	#include <asm-generic/pgtable.h>
	551
ae8ee150 MS	552	extern unsigned long ioremap_bot, ioremap_base;
ae8ee150 MS	553
cd44da15	554	void consistent_alloc(gfp_t gfp, size_t size, dma_addr_t dma_handle);
f1525765	555	void consistent_free(size_t size, void *vaddr);
ae8ee150 MS	556	void consistent_sync(void *vaddr, size_t size, int direction);
	557	void consistent_sync_page(struct page *page, unsigned long offset,
	558	size_t size, int direction);
3a8e3265	559	unsigned long consistent_virt_to_pfn(void *vaddr);
ae8ee150	560
6a3cece5 MS	561	void setup_memory(void);
	562	#endif /* __ASSEMBLY__ */
	563
	564	#endif /* _ASM_MICROBLAZE_PGTABLE_H */