[deliverable/linux.git] / arch / sparc / include / asm / pgtable_32.h

#ifndef _SPARC_PGTABLE_H
#define _SPARC_PGTABLE_H

/*  asm/pgtable.h:  Defines and functions used to work
 *                        with Sparc page tables.
 *
 *  Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
 *  Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
 */

#include <linux/const.h>

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

#include <linux/spinlock.h>
#include <linux/swap.h>
#include <asm/types.h>
#include <asm/pgtsrmmu.h>
#include <asm/oplib.h>
#include <asm/btfixup.h>
#include <asm/cpu_type.h>


struct vm_area_struct;
struct page;

extern void load_mmu(void);
extern unsigned long calc_highpages(void);

BTFIXUPDEF_SIMM13(pgdir_shift)
BTFIXUPDEF_SETHI(pgdir_size)
BTFIXUPDEF_SETHI(pgdir_mask)

BTFIXUPDEF_SIMM13(ptrs_per_pmd)
BTFIXUPDEF_SIMM13(ptrs_per_pgd)
BTFIXUPDEF_SIMM13(user_ptrs_per_pgd)

#define pte_ERROR(e)   __builtin_trap()
#define pmd_ERROR(e)   __builtin_trap()
#define pgd_ERROR(e)   __builtin_trap()

BTFIXUPDEF_INT(page_none)
BTFIXUPDEF_INT(page_copy)
BTFIXUPDEF_INT(page_readonly)
BTFIXUPDEF_INT(page_kernel)

#define PMD_SHIFT		22
#define PMD_SIZE        	(1UL << PMD_SHIFT)
#define PMD_MASK        	(~(PMD_SIZE-1))
#define PMD_ALIGN(__addr) 	(((__addr) + ~PMD_MASK) & PMD_MASK)
#define PGDIR_SHIFT     	BTFIXUP_SIMM13(pgdir_shift)
#define PGDIR_SIZE      	BTFIXUP_SETHI(pgdir_size)
#define PGDIR_MASK      	BTFIXUP_SETHI(pgdir_mask)
#define PTRS_PER_PTE    	1024
#define PTRS_PER_PMD    	BTFIXUP_SIMM13(ptrs_per_pmd)
#define PTRS_PER_PGD    	BTFIXUP_SIMM13(ptrs_per_pgd)
#define USER_PTRS_PER_PGD	BTFIXUP_SIMM13(user_ptrs_per_pgd)
#define FIRST_USER_ADDRESS	0
#define PTE_SIZE		(PTRS_PER_PTE*4)

#define PAGE_NONE      __pgprot(BTFIXUP_INT(page_none))
extern pgprot_t PAGE_SHARED;
#define PAGE_COPY      __pgprot(BTFIXUP_INT(page_copy))
#define PAGE_READONLY  __pgprot(BTFIXUP_INT(page_readonly))

extern unsigned long page_kernel;

#ifdef MODULE
#define PAGE_KERNEL	page_kernel
#else
#define PAGE_KERNEL    __pgprot(BTFIXUP_INT(page_kernel))
#endif

/* Top-level page directory */
extern pgd_t swapper_pg_dir[1024];

extern void paging_init(void);

/* Page table for 0-4MB for everybody, on the Sparc this
 * holds the same as on the i386.
 */
extern pte_t pg0[1024];
extern pte_t pg1[1024];
extern pte_t pg2[1024];
extern pte_t pg3[1024];

extern unsigned long ptr_in_current_pgd;

/* Here is a trick, since mmap.c need the initializer elements for
 * protection_map[] to be constant at compile time, I set the following
 * to all zeros.  I set it to the real values after I link in the
 * appropriate MMU page table routines at boot time.
 */
#define __P000  __pgprot(0)
#define __P001  __pgprot(0)
#define __P010  __pgprot(0)
#define __P011  __pgprot(0)
#define __P100  __pgprot(0)
#define __P101  __pgprot(0)
#define __P110  __pgprot(0)
#define __P111  __pgprot(0)

#define __S000	__pgprot(0)
#define __S001	__pgprot(0)
#define __S010	__pgprot(0)
#define __S011	__pgprot(0)
#define __S100	__pgprot(0)
#define __S101	__pgprot(0)
#define __S110	__pgprot(0)
#define __S111	__pgprot(0)

extern int num_contexts;

/* First physical page can be anywhere, the following is needed so that
 * va-->pa and vice versa conversions work properly without performance
 * hit for all __pa()/__va() operations.
 */
extern unsigned long phys_base;
extern unsigned long pfn_base;

/*
 * BAD_PAGETABLE is used when we need a bogus page-table, while
 * BAD_PAGE is used for a bogus page.
 *
 * ZERO_PAGE is a global shared page that is always zero: used
 * for zero-mapped memory areas etc..
 */
extern pte_t * __bad_pagetable(void);
extern pte_t __bad_page(void);
extern unsigned long empty_zero_page;

#define BAD_PAGETABLE __bad_pagetable()
#define BAD_PAGE __bad_page()
#define ZERO_PAGE(vaddr) (virt_to_page(&empty_zero_page))

/*
 */
BTFIXUPDEF_CALL_CONST(struct page *, pmd_page, pmd_t)
BTFIXUPDEF_CALL_CONST(unsigned long, pgd_page_vaddr, pgd_t)

#define pmd_page(pmd) BTFIXUP_CALL(pmd_page)(pmd)
#define pgd_page_vaddr(pgd) BTFIXUP_CALL(pgd_page_vaddr)(pgd)

BTFIXUPDEF_CALL_CONST(int, pte_present, pte_t)
BTFIXUPDEF_CALL(void, pte_clear, pte_t *)

static inline int pte_none(pte_t pte)
{
	return !pte_val(pte);
}

#define pte_present(pte) BTFIXUP_CALL(pte_present)(pte)
#define pte_clear(mm,addr,pte) BTFIXUP_CALL(pte_clear)(pte)

BTFIXUPDEF_CALL_CONST(int, pmd_bad, pmd_t)
BTFIXUPDEF_CALL_CONST(int, pmd_present, pmd_t)
BTFIXUPDEF_CALL(void, pmd_clear, pmd_t *)

static inline int pmd_none(pmd_t pmd)
{
	return !pmd_val(pmd);
}

#define pmd_bad(pmd) BTFIXUP_CALL(pmd_bad)(pmd)
#define pmd_present(pmd) BTFIXUP_CALL(pmd_present)(pmd)
#define pmd_clear(pmd) BTFIXUP_CALL(pmd_clear)(pmd)

BTFIXUPDEF_CALL_CONST(int, pgd_none, pgd_t)
BTFIXUPDEF_CALL_CONST(int, pgd_bad, pgd_t)
BTFIXUPDEF_CALL_CONST(int, pgd_present, pgd_t)
BTFIXUPDEF_CALL(void, pgd_clear, pgd_t *)

#define pgd_none(pgd) BTFIXUP_CALL(pgd_none)(pgd)
#define pgd_bad(pgd) BTFIXUP_CALL(pgd_bad)(pgd)
#define pgd_present(pgd) BTFIXUP_CALL(pgd_present)(pgd)
#define pgd_clear(pgd) BTFIXUP_CALL(pgd_clear)(pgd)

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

static int pte_write(pte_t pte) __attribute_const__;
static inline int pte_write(pte_t pte)
{
	return pte_val(pte) & BTFIXUP_HALF(pte_writei);
}

static int pte_dirty(pte_t pte) __attribute_const__;
static inline int pte_dirty(pte_t pte)
{
	return pte_val(pte) & BTFIXUP_HALF(pte_dirtyi);
}

static int pte_young(pte_t pte) __attribute_const__;
static inline int pte_young(pte_t pte)
{
	return pte_val(pte) & BTFIXUP_HALF(pte_youngi);
}

/*
 * The following only work if pte_present() is not true.
 */
BTFIXUPDEF_HALF(pte_filei)

static int pte_file(pte_t pte) __attribute_const__;
static inline int pte_file(pte_t pte)
{
	return pte_val(pte) & BTFIXUP_HALF(pte_filei);
}

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

/*
 */
BTFIXUPDEF_HALF(pte_wrprotecti)
BTFIXUPDEF_HALF(pte_mkcleani)
BTFIXUPDEF_HALF(pte_mkoldi)

static pte_t pte_wrprotect(pte_t pte) __attribute_const__;
static inline pte_t pte_wrprotect(pte_t pte)
{
	return __pte(pte_val(pte) & ~BTFIXUP_HALF(pte_wrprotecti));
}

static pte_t pte_mkclean(pte_t pte) __attribute_const__;
static inline pte_t pte_mkclean(pte_t pte)
{
	return __pte(pte_val(pte) & ~BTFIXUP_HALF(pte_mkcleani));
}

static pte_t pte_mkold(pte_t pte) __attribute_const__;
static inline pte_t pte_mkold(pte_t pte)
{
	return __pte(pte_val(pte) & ~BTFIXUP_HALF(pte_mkoldi));
}

BTFIXUPDEF_CALL_CONST(pte_t, pte_mkwrite, pte_t)
BTFIXUPDEF_CALL_CONST(pte_t, pte_mkdirty, pte_t)
BTFIXUPDEF_CALL_CONST(pte_t, pte_mkyoung, pte_t)

#define pte_mkwrite(pte) BTFIXUP_CALL(pte_mkwrite)(pte)
#define pte_mkdirty(pte) BTFIXUP_CALL(pte_mkdirty)(pte)
#define pte_mkyoung(pte) BTFIXUP_CALL(pte_mkyoung)(pte)

#define pte_mkspecial(pte)    (pte)

#define pfn_pte(pfn, prot)		mk_pte(pfn_to_page(pfn), prot)

BTFIXUPDEF_CALL(unsigned long,	 pte_pfn, pte_t)
#define pte_pfn(pte) BTFIXUP_CALL(pte_pfn)(pte)
#define pte_page(pte)	pfn_to_page(pte_pfn(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.
 */
BTFIXUPDEF_CALL_CONST(pte_t, mk_pte, struct page *, pgprot_t)

BTFIXUPDEF_CALL_CONST(pte_t, mk_pte_phys, unsigned long, pgprot_t)
BTFIXUPDEF_CALL_CONST(pte_t, mk_pte_io, unsigned long, pgprot_t, int)

#define mk_pte(page,pgprot) BTFIXUP_CALL(mk_pte)(page,pgprot)
#define mk_pte_phys(page,pgprot) BTFIXUP_CALL(mk_pte_phys)(page,pgprot)
#define mk_pte_io(page,pgprot,space) BTFIXUP_CALL(mk_pte_io)(page,pgprot,space)

#define pgprot_noncached pgprot_noncached
static inline pgprot_t pgprot_noncached(pgprot_t prot)
{
	prot &= ~__pgprot(SRMMU_CACHE);
	return prot;
}

BTFIXUPDEF_INT(pte_modify_mask)

static pte_t pte_modify(pte_t pte, pgprot_t newprot) __attribute_const__;
static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
{
	return __pte((pte_val(pte) & BTFIXUP_INT(pte_modify_mask)) |
		pgprot_val(newprot));
}

#define pgd_index(address) ((address) >> PGDIR_SHIFT)

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

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

/* Find an entry in the second-level page table.. */
BTFIXUPDEF_CALL(pmd_t *, pmd_offset, pgd_t *, unsigned long)
#define pmd_offset(dir,addr) BTFIXUP_CALL(pmd_offset)(dir,addr)

/* Find an entry in the third-level page table.. */
BTFIXUPDEF_CALL(pte_t *, pte_offset_kernel, pmd_t *, unsigned long)
#define pte_offset_kernel(dir,addr) BTFIXUP_CALL(pte_offset_kernel)(dir,addr)

/*
 * This shortcut works on sun4m (and sun4d) because the nocache area is static.
 */
#define pte_offset_map(d, a)		pte_offset_kernel(d,a)
#define pte_unmap(pte)		do{}while(0)

/* Certain architectures need to do special things when pte's
 * within a page table are directly modified.  Thus, the following
 * hook is made available.
 */

BTFIXUPDEF_CALL(void, set_pte, pte_t *, pte_t)

#define set_pte(ptep,pteval) BTFIXUP_CALL(set_pte)(ptep,pteval)
#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)

struct seq_file;
BTFIXUPDEF_CALL(void, mmu_info, struct seq_file *)

#define mmu_info(p) BTFIXUP_CALL(mmu_info)(p)

/* Fault handler stuff... */
#define FAULT_CODE_PROT     0x1
#define FAULT_CODE_WRITE    0x2
#define FAULT_CODE_USER     0x4

BTFIXUPDEF_CALL(void, update_mmu_cache, struct vm_area_struct *, unsigned long, pte_t *)

#define update_mmu_cache(vma,addr,ptep) BTFIXUP_CALL(update_mmu_cache)(vma,addr,ptep)

BTFIXUPDEF_CALL(void, sparc_mapiorange, unsigned int, unsigned long,
    unsigned long, unsigned int)
BTFIXUPDEF_CALL(void, sparc_unmapiorange, unsigned long, unsigned int)
#define sparc_mapiorange(bus,pa,va,len) BTFIXUP_CALL(sparc_mapiorange)(bus,pa,va,len)
#define sparc_unmapiorange(va,len) BTFIXUP_CALL(sparc_unmapiorange)(va,len)

extern int invalid_segment;

/* Encode and de-code a swap entry */
BTFIXUPDEF_CALL(unsigned long, __swp_type, swp_entry_t)
BTFIXUPDEF_CALL(unsigned long, __swp_offset, swp_entry_t)
BTFIXUPDEF_CALL(swp_entry_t, __swp_entry, unsigned long, unsigned long)

#define __swp_type(__x)			BTFIXUP_CALL(__swp_type)(__x)
#define __swp_offset(__x)		BTFIXUP_CALL(__swp_offset)(__x)
#define __swp_entry(__type,__off)	BTFIXUP_CALL(__swp_entry)(__type,__off)

#define __pte_to_swp_entry(pte)		((swp_entry_t) { pte_val(pte) })
#define __swp_entry_to_pte(x)		((pte_t) { (x).val })

/* file-offset-in-pte helpers */
static inline unsigned long pte_to_pgoff(pte_t pte)
{
	return pte_val(pte) >> SRMMU_PTE_FILE_SHIFT;
}

static inline pte_t pgoff_to_pte(unsigned long pgoff)
{
	return __pte((pgoff << SRMMU_PTE_FILE_SHIFT) | SRMMU_FILE);
}

/*
 * This is made a constant because mm/fremap.c required a constant.
 */
#define PTE_FILE_MAX_BITS 24

/*
 */
struct ctx_list {
	struct ctx_list *next;
	struct ctx_list *prev;
	unsigned int ctx_number;
	struct mm_struct *ctx_mm;
};

extern struct ctx_list *ctx_list_pool;  /* Dynamically allocated */
extern struct ctx_list ctx_free;        /* Head of free list */
extern struct ctx_list ctx_used;        /* Head of used contexts list */

#define NO_CONTEXT     -1

static inline void remove_from_ctx_list(struct ctx_list *entry)
{
	entry->next->prev = entry->prev;
	entry->prev->next = entry->next;
}

static inline void add_to_ctx_list(struct ctx_list *head, struct ctx_list *entry)
{
	entry->next = head;
	(entry->prev = head->prev)->next = entry;
	head->prev = entry;
}
#define add_to_free_ctxlist(entry) add_to_ctx_list(&ctx_free, entry)
#define add_to_used_ctxlist(entry) add_to_ctx_list(&ctx_used, entry)

static inline unsigned long
__get_phys (unsigned long addr)
{
	switch (sparc_cpu_model){
	case sun4m:
	case sun4d:
		return ((srmmu_get_pte (addr) & 0xffffff00) << 4);
	default:
		return 0;
	}
}

static inline int
__get_iospace (unsigned long addr)
{
	switch (sparc_cpu_model){
	case sun4m:
	case sun4d:
		return (srmmu_get_pte (addr) >> 28);
	default:
		return -1;
	}
}

extern unsigned long *sparc_valid_addr_bitmap;

/* Needs to be defined here and not in linux/mm.h, as it is arch dependent */
#define kern_addr_valid(addr) \
	(test_bit(__pa((unsigned long)(addr))>>20, sparc_valid_addr_bitmap))

/*
 * For sparc32&64, the pfn in io_remap_pfn_range() carries <iospace> in
 * its high 4 bits.  These macros/functions put it there or get it from there.
 */
#define MK_IOSPACE_PFN(space, pfn)	(pfn | (space << (BITS_PER_LONG - 4)))
#define GET_IOSPACE(pfn)		(pfn >> (BITS_PER_LONG - 4))
#define GET_PFN(pfn)			(pfn & 0x0fffffffUL)

extern int remap_pfn_range(struct vm_area_struct *, unsigned long, unsigned long,
			   unsigned long, pgprot_t);

static inline int io_remap_pfn_range(struct vm_area_struct *vma,
				     unsigned long from, unsigned long pfn,
				     unsigned long size, pgprot_t prot)
{
	unsigned long long offset, space, phys_base;

	offset = ((unsigned long long) GET_PFN(pfn)) << PAGE_SHIFT;
	space = GET_IOSPACE(pfn);
	phys_base = offset | (space << 32ULL);

	return remap_pfn_range(vma, from, phys_base >> PAGE_SHIFT, size, prot);
}

#define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
#define ptep_set_access_flags(__vma, __address, __ptep, __entry, __dirty) \
({									  \
	int __changed = !pte_same(*(__ptep), __entry);			  \
	if (__changed) {						  \
		set_pte_at((__vma)->vm_mm, (__address), __ptep, __entry); \
		flush_tlb_page(__vma, __address);			  \
	}								  \
	__changed;							  \
})

#include <asm-generic/pgtable.h>

#endif /* !(__ASSEMBLY__) */

#define VMALLOC_START           _AC(0xfe600000,UL)
#define VMALLOC_END             _AC(0xffc00000,UL)

/* We provide our own get_unmapped_area to cope with VA holes for userland */
#define HAVE_ARCH_UNMAPPED_AREA

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

#endif /* !(_SPARC_PGTABLE_H) */
Commit	Line	Data
f5e706ad SR	1	#ifndef _SPARC_PGTABLE_H
	2	#define _SPARC_PGTABLE_H
	3
a439fe51	4	/* asm/pgtable.h: Defines and functions used to work
f5e706ad SR	5	* with Sparc page tables.
	6	*
	7	* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
	8	* Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
	9	*/
	10
eb485d64 SR	11	#include <linux/const.h>
eb485d64 SR	12
f5e706ad SR	13	#ifndef __ASSEMBLY__
	14	#include <asm-generic/4level-fixup.h>
	15
	16	#include <linux/spinlock.h>
	17	#include <linux/swap.h>
	18	#include <asm/types.h>
f5e706ad	19	#include <asm/pgtsrmmu.h>
f5e706ad SR	20	#include <asm/oplib.h>
f5e706ad SR	21	#include <asm/btfixup.h>
d550bbd4	22	#include <asm/cpu_type.h>
f5e706ad SR	23
	24
	25	struct vm_area_struct;
	26	struct page;
	27
	28	extern void load_mmu(void);
	29	extern unsigned long calc_highpages(void);
	30
	31	BTFIXUPDEF_SIMM13(pgdir_shift)
	32	BTFIXUPDEF_SETHI(pgdir_size)
	33	BTFIXUPDEF_SETHI(pgdir_mask)
	34
	35	BTFIXUPDEF_SIMM13(ptrs_per_pmd)
	36	BTFIXUPDEF_SIMM13(ptrs_per_pgd)
	37	BTFIXUPDEF_SIMM13(user_ptrs_per_pgd)
	38
	39	#define pte_ERROR(e) __builtin_trap()
	40	#define pmd_ERROR(e) __builtin_trap()
	41	#define pgd_ERROR(e) __builtin_trap()
	42
	43	BTFIXUPDEF_INT(page_none)
	44	BTFIXUPDEF_INT(page_copy)
	45	BTFIXUPDEF_INT(page_readonly)
	46	BTFIXUPDEF_INT(page_kernel)
	47
1ee0e144	48	#define PMD_SHIFT 22
f5e706ad SR	49	#define PMD_SIZE (1UL << PMD_SHIFT)
	50	#define PMD_MASK (~(PMD_SIZE-1))
	51	#define PMD_ALIGN(__addr) (((__addr) + ~PMD_MASK) & PMD_MASK)
	52	#define PGDIR_SHIFT BTFIXUP_SIMM13(pgdir_shift)
	53	#define PGDIR_SIZE BTFIXUP_SETHI(pgdir_size)
	54	#define PGDIR_MASK BTFIXUP_SETHI(pgdir_mask)
	55	#define PTRS_PER_PTE 1024
	56	#define PTRS_PER_PMD BTFIXUP_SIMM13(ptrs_per_pmd)
	57	#define PTRS_PER_PGD BTFIXUP_SIMM13(ptrs_per_pgd)
	58	#define USER_PTRS_PER_PGD BTFIXUP_SIMM13(user_ptrs_per_pgd)
	59	#define FIRST_USER_ADDRESS 0
	60	#define PTE_SIZE (PTRS_PER_PTE*4)
	61
	62	#define PAGE_NONE __pgprot(BTFIXUP_INT(page_none))
	63	extern pgprot_t PAGE_SHARED;
	64	#define PAGE_COPY __pgprot(BTFIXUP_INT(page_copy))
	65	#define PAGE_READONLY __pgprot(BTFIXUP_INT(page_readonly))
	66
	67	extern unsigned long page_kernel;
	68
	69	#ifdef MODULE
	70	#define PAGE_KERNEL page_kernel
	71	#else
	72	#define PAGE_KERNEL __pgprot(BTFIXUP_INT(page_kernel))
	73	#endif
	74
	75	/* Top-level page directory */
	76	extern pgd_t swapper_pg_dir[1024];
	77
	78	extern void paging_init(void);
	79
	80	/* Page table for 0-4MB for everybody, on the Sparc this
	81	* holds the same as on the i386.
	82	*/
	83	extern pte_t pg0[1024];
	84	extern pte_t pg1[1024];
	85	extern pte_t pg2[1024];
	86	extern pte_t pg3[1024];
	87
	88	extern unsigned long ptr_in_current_pgd;
	89
	90	/* Here is a trick, since mmap.c need the initializer elements for
	91	* protection_map[] to be constant at compile time, I set the following
	92	* to all zeros. I set it to the real values after I link in the
	93	* appropriate MMU page table routines at boot time.
	94	*/
	95	#define __P000 __pgprot(0)
	96	#define __P001 __pgprot(0)
	97	#define __P010 __pgprot(0)
	98	#define __P011 __pgprot(0)
	99	#define __P100 __pgprot(0)
	100	#define __P101 __pgprot(0)
	101	#define __P110 __pgprot(0)
	102	#define __P111 __pgprot(0)
	103
	104	#define __S000 __pgprot(0)
	105	#define __S001 __pgprot(0)
	106	#define __S010 __pgprot(0)
	107	#define __S011 __pgprot(0)
	108	#define __S100 __pgprot(0)
	109	#define __S101 __pgprot(0)
	110	#define __S110 __pgprot(0)
	111	#define __S111 __pgprot(0)
	112
113	extern int num_contexts;
114
115	/* First physical page can be anywhere, the following is needed so that
116	* va-->pa and vice versa conversions work properly without performance
117	* hit for all __pa()/__va() operations.
118	*/
119	extern unsigned long phys_base;
120	extern unsigned long pfn_base;
121
122	/*
123	* BAD_PAGETABLE is used when we need a bogus page-table, while
124	* BAD_PAGE is used for a bogus page.
125	*
126	* ZERO_PAGE is a global shared page that is always zero: used
127	* for zero-mapped memory areas etc..
128	*/
129	extern pte_t * __bad_pagetable(void);
130	extern pte_t __bad_page(void);
131	extern unsigned long empty_zero_page;
132
133	#define BAD_PAGETABLE __bad_pagetable()
134	#define BAD_PAGE __bad_page()
135	#define ZERO_PAGE(vaddr) (virt_to_page(&empty_zero_page))
136
137	/*
138	*/
139	BTFIXUPDEF_CALL_CONST(struct page *, pmd_page, pmd_t)
140	BTFIXUPDEF_CALL_CONST(unsigned long, pgd_page_vaddr, pgd_t)
141
142	#define pmd_page(pmd) BTFIXUP_CALL(pmd_page)(pmd)
143	#define pgd_page_vaddr(pgd) BTFIXUP_CALL(pgd_page_vaddr)(pgd)
144
f5e706ad SR	145	BTFIXUPDEF_CALL_CONST(int, pte_present, pte_t)
	146	BTFIXUPDEF_CALL(void, pte_clear, pte_t *)
	147
	148	static inline int pte_none(pte_t pte)
	149	{
c87fe1c0	150	return !pte_val(pte);
f5e706ad SR	151	}
	152
	153	#define pte_present(pte) BTFIXUP_CALL(pte_present)(pte)
	154	#define pte_clear(mm,addr,pte) BTFIXUP_CALL(pte_clear)(pte)
	155
	156	BTFIXUPDEF_CALL_CONST(int, pmd_bad, pmd_t)
	157	BTFIXUPDEF_CALL_CONST(int, pmd_present, pmd_t)
	158	BTFIXUPDEF_CALL(void, pmd_clear, pmd_t *)
	159
	160	static inline int pmd_none(pmd_t pmd)
	161	{
c87fe1c0	162	return !pmd_val(pmd);
f5e706ad SR	163	}
	164
	165	#define pmd_bad(pmd) BTFIXUP_CALL(pmd_bad)(pmd)
	166	#define pmd_present(pmd) BTFIXUP_CALL(pmd_present)(pmd)
	167	#define pmd_clear(pmd) BTFIXUP_CALL(pmd_clear)(pmd)
	168
	169	BTFIXUPDEF_CALL_CONST(int, pgd_none, pgd_t)
	170	BTFIXUPDEF_CALL_CONST(int, pgd_bad, pgd_t)
	171	BTFIXUPDEF_CALL_CONST(int, pgd_present, pgd_t)
	172	BTFIXUPDEF_CALL(void, pgd_clear, pgd_t *)
	173
	174	#define pgd_none(pgd) BTFIXUP_CALL(pgd_none)(pgd)
	175	#define pgd_bad(pgd) BTFIXUP_CALL(pgd_bad)(pgd)
	176	#define pgd_present(pgd) BTFIXUP_CALL(pgd_present)(pgd)
	177	#define pgd_clear(pgd) BTFIXUP_CALL(pgd_clear)(pgd)
	178
	179	/*
	180	* The following only work if pte_present() is true.
	181	* Undefined behaviour if not..
	182	*/
	183	BTFIXUPDEF_HALF(pte_writei)
	184	BTFIXUPDEF_HALF(pte_dirtyi)
	185	BTFIXUPDEF_HALF(pte_youngi)
	186
	187	static int pte_write(pte_t pte) __attribute_const__;
	188	static inline int pte_write(pte_t pte)
	189	{
	190	return pte_val(pte) & BTFIXUP_HALF(pte_writei);
	191	}
	192
	193	static int pte_dirty(pte_t pte) __attribute_const__;
	194	static inline int pte_dirty(pte_t pte)
	195	{
	196	return pte_val(pte) & BTFIXUP_HALF(pte_dirtyi);
	197	}
	198
	199	static int pte_young(pte_t pte) __attribute_const__;
	200	static inline int pte_young(pte_t pte)
	201	{
	202	return pte_val(pte) & BTFIXUP_HALF(pte_youngi);
	203	}
	204
	205	/*
	206	* The following only work if pte_present() is not true.
	207	*/
	208	BTFIXUPDEF_HALF(pte_filei)
	209
	210	static int pte_file(pte_t pte) __attribute_const__;
	211	static inline int pte_file(pte_t pte)
	212	{
	213	return pte_val(pte) & BTFIXUP_HALF(pte_filei);
	214	}
	215
	216	static inline int pte_special(pte_t pte)
	217	{
	218	return 0;
	219	}
	220
	221	/*
	222	*/
	223	BTFIXUPDEF_HALF(pte_wrprotecti)
	224	BTFIXUPDEF_HALF(pte_mkcleani)
	225	BTFIXUPDEF_HALF(pte_mkoldi)
	226
227	static pte_t pte_wrprotect(pte_t pte) __attribute_const__;
228	static inline pte_t pte_wrprotect(pte_t pte)
229	{
230	return __pte(pte_val(pte) & ~BTFIXUP_HALF(pte_wrprotecti));
231	}
232
233	static pte_t pte_mkclean(pte_t pte) __attribute_const__;
234	static inline pte_t pte_mkclean(pte_t pte)
235	{
236	return __pte(pte_val(pte) & ~BTFIXUP_HALF(pte_mkcleani));
237	}
238
239	static pte_t pte_mkold(pte_t pte) __attribute_const__;
240	static inline pte_t pte_mkold(pte_t pte)
241	{
242	return __pte(pte_val(pte) & ~BTFIXUP_HALF(pte_mkoldi));
243	}
244
245	BTFIXUPDEF_CALL_CONST(pte_t, pte_mkwrite, pte_t)
246	BTFIXUPDEF_CALL_CONST(pte_t, pte_mkdirty, pte_t)
247	BTFIXUPDEF_CALL_CONST(pte_t, pte_mkyoung, pte_t)
248
249	#define pte_mkwrite(pte) BTFIXUP_CALL(pte_mkwrite)(pte)
250	#define pte_mkdirty(pte) BTFIXUP_CALL(pte_mkdirty)(pte)
251	#define pte_mkyoung(pte) BTFIXUP_CALL(pte_mkyoung)(pte)
252
253	#define pte_mkspecial(pte) (pte)
254
255	#define pfn_pte(pfn, prot) mk_pte(pfn_to_page(pfn), prot)
256
257	BTFIXUPDEF_CALL(unsigned long, pte_pfn, pte_t)
258	#define pte_pfn(pte) BTFIXUP_CALL(pte_pfn)(pte)
259	#define pte_page(pte) pfn_to_page(pte_pfn(pte))
260
261	/*
262	* Conversion functions: convert a page and protection to a page entry,
263	* and a page entry and page directory to the page they refer to.
264	*/
265	BTFIXUPDEF_CALL_CONST(pte_t, mk_pte, struct page *, pgprot_t)
266
267	BTFIXUPDEF_CALL_CONST(pte_t, mk_pte_phys, unsigned long, pgprot_t)
268	BTFIXUPDEF_CALL_CONST(pte_t, mk_pte_io, unsigned long, pgprot_t, int)
f5e706ad SR	269
	270	#define mk_pte(page,pgprot) BTFIXUP_CALL(mk_pte)(page,pgprot)
	271	#define mk_pte_phys(page,pgprot) BTFIXUP_CALL(mk_pte_phys)(page,pgprot)
	272	#define mk_pte_io(page,pgprot,space) BTFIXUP_CALL(mk_pte_io)(page,pgprot,space)
	273
afaedde7 SR	274	#define pgprot_noncached pgprot_noncached
	275	static inline pgprot_t pgprot_noncached(pgprot_t prot)
	276	{
	277	prot &= ~__pgprot(SRMMU_CACHE);
	278	return prot;
	279	}
f5e706ad SR	280
	281	BTFIXUPDEF_INT(pte_modify_mask)
	282
	283	static pte_t pte_modify(pte_t pte, pgprot_t newprot) __attribute_const__;
	284	static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
	285	{
	286	return __pte((pte_val(pte) & BTFIXUP_INT(pte_modify_mask)) \|
	287	pgprot_val(newprot));
	288	}
	289
	290	#define pgd_index(address) ((address) >> PGDIR_SHIFT)
	291
	292	/* to find an entry in a page-table-directory */
	293	#define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
	294
	295	/* to find an entry in a kernel page-table-directory */
	296	#define pgd_offset_k(address) pgd_offset(&init_mm, address)
	297
	298	/* Find an entry in the second-level page table.. */
	299	BTFIXUPDEF_CALL(pmd_t , pmd_offset, pgd_t , unsigned long)
	300	#define pmd_offset(dir,addr) BTFIXUP_CALL(pmd_offset)(dir,addr)
	301
	302	/* Find an entry in the third-level page table.. */
	303	BTFIXUPDEF_CALL(pte_t , pte_offset_kernel, pmd_t , unsigned long)
	304	#define pte_offset_kernel(dir,addr) BTFIXUP_CALL(pte_offset_kernel)(dir,addr)
	305
	306	/*
ee906c9e	307	* This shortcut works on sun4m (and sun4d) because the nocache area is static.
f5e706ad SR	308	*/
f5e706ad SR	309	#define pte_offset_map(d, a) pte_offset_kernel(d,a)
f5e706ad	310	#define pte_unmap(pte) do{}while(0)
f5e706ad SR	311
	312	/* Certain architectures need to do special things when pte's
	313	* within a page table are directly modified. Thus, the following
	314	* hook is made available.
	315	*/
	316
	317	BTFIXUPDEF_CALL(void, set_pte, pte_t *, pte_t)
	318
	319	#define set_pte(ptep,pteval) BTFIXUP_CALL(set_pte)(ptep,pteval)
	320	#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
	321
	322	struct seq_file;
	323	BTFIXUPDEF_CALL(void, mmu_info, struct seq_file *)
	324
	325	#define mmu_info(p) BTFIXUP_CALL(mmu_info)(p)
	326
	327	/* Fault handler stuff... */
	328	#define FAULT_CODE_PROT 0x1
	329	#define FAULT_CODE_WRITE 0x2
	330	#define FAULT_CODE_USER 0x4
	331
4b3073e1	332	BTFIXUPDEF_CALL(void, update_mmu_cache, struct vm_area_struct , unsigned long, pte_t )
f5e706ad	333
4b3073e1	334	#define update_mmu_cache(vma,addr,ptep) BTFIXUP_CALL(update_mmu_cache)(vma,addr,ptep)
f5e706ad SR	335
	336	BTFIXUPDEF_CALL(void, sparc_mapiorange, unsigned int, unsigned long,
	337	unsigned long, unsigned int)
	338	BTFIXUPDEF_CALL(void, sparc_unmapiorange, unsigned long, unsigned int)
	339	#define sparc_mapiorange(bus,pa,va,len) BTFIXUP_CALL(sparc_mapiorange)(bus,pa,va,len)
	340	#define sparc_unmapiorange(va,len) BTFIXUP_CALL(sparc_unmapiorange)(va,len)
	341
	342	extern int invalid_segment;
	343
	344	/* Encode and de-code a swap entry */
	345	BTFIXUPDEF_CALL(unsigned long, __swp_type, swp_entry_t)
	346	BTFIXUPDEF_CALL(unsigned long, __swp_offset, swp_entry_t)
	347	BTFIXUPDEF_CALL(swp_entry_t, __swp_entry, unsigned long, unsigned long)
	348
	349	#define __swp_type(__x) BTFIXUP_CALL(__swp_type)(__x)
	350	#define __swp_offset(__x) BTFIXUP_CALL(__swp_offset)(__x)
	351	#define __swp_entry(__type,__off) BTFIXUP_CALL(__swp_entry)(__type,__off)
	352
	353	#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
	354	#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
	355
	356	/* file-offset-in-pte helpers */
afaedde7 SR	357	static inline unsigned long pte_to_pgoff(pte_t pte)
	358	{
	359	return pte_val(pte) >> SRMMU_PTE_FILE_SHIFT;
	360	}
f5e706ad	361
afaedde7 SR	362	static inline pte_t pgoff_to_pte(unsigned long pgoff)
	363	{
	364	return __pte((pgoff << SRMMU_PTE_FILE_SHIFT) \| SRMMU_FILE);
	365	}
f5e706ad SR	366
	367	/*
	368	* This is made a constant because mm/fremap.c required a constant.
f5e706ad SR	369	*/
	370	#define PTE_FILE_MAX_BITS 24
	371
	372	/*
	373	*/
	374	struct ctx_list {
	375	struct ctx_list *next;
	376	struct ctx_list *prev;
	377	unsigned int ctx_number;
	378	struct mm_struct *ctx_mm;
	379	};
	380
	381	extern struct ctx_list ctx_list_pool; / Dynamically allocated */
	382	extern struct ctx_list ctx_free; /* Head of free list */
	383	extern struct ctx_list ctx_used; /* Head of used contexts list */
	384
	385	#define NO_CONTEXT -1
	386
	387	static inline void remove_from_ctx_list(struct ctx_list *entry)
	388	{
	389	entry->next->prev = entry->prev;
	390	entry->prev->next = entry->next;
	391	}
	392
	393	static inline void add_to_ctx_list(struct ctx_list head, struct ctx_list entry)
	394	{
	395	entry->next = head;
	396	(entry->prev = head->prev)->next = entry;
	397	head->prev = entry;
	398	}
	399	#define add_to_free_ctxlist(entry) add_to_ctx_list(&ctx_free, entry)
	400	#define add_to_used_ctxlist(entry) add_to_ctx_list(&ctx_used, entry)
	401
	402	static inline unsigned long
	403	__get_phys (unsigned long addr)
	404	{
	405	switch (sparc_cpu_model){
f5e706ad SR	406	case sun4m:
	407	case sun4d:
	408	return ((srmmu_get_pte (addr) & 0xffffff00) << 4);
	409	default:
	410	return 0;
	411	}
	412	}
	413
	414	static inline int
	415	__get_iospace (unsigned long addr)
	416	{
	417	switch (sparc_cpu_model){
f5e706ad SR	418	case sun4m:
	419	case sun4d:
	420	return (srmmu_get_pte (addr) >> 28);
	421	default:
	422	return -1;
	423	}
	424	}
	425
	426	extern unsigned long *sparc_valid_addr_bitmap;
	427
	428	/* Needs to be defined here and not in linux/mm.h, as it is arch dependent */
	429	#define kern_addr_valid(addr) \
	430	(test_bit(__pa((unsigned long)(addr))>>20, sparc_valid_addr_bitmap))
	431
f5e706ad SR	432	/*
	433	* For sparc32&64, the pfn in io_remap_pfn_range() carries <iospace> in
	434	* its high 4 bits. These macros/functions put it there or get it from there.
	435	*/
	436	#define MK_IOSPACE_PFN(space, pfn) (pfn \| (space << (BITS_PER_LONG - 4)))
	437	#define GET_IOSPACE(pfn) (pfn >> (BITS_PER_LONG - 4))
	438	#define GET_PFN(pfn) (pfn & 0x0fffffffUL)
	439
3e37fd31 DM	440	extern int remap_pfn_range(struct vm_area_struct *, unsigned long, unsigned long,
	441	unsigned long, pgprot_t);
	442
	443	static inline int io_remap_pfn_range(struct vm_area_struct *vma,
	444	unsigned long from, unsigned long pfn,
	445	unsigned long size, pgprot_t prot)
	446	{
	447	unsigned long long offset, space, phys_base;
	448
	449	offset = ((unsigned long long) GET_PFN(pfn)) << PAGE_SHIFT;
	450	space = GET_IOSPACE(pfn);
	451	phys_base = offset \| (space << 32ULL);
	452
	453	return remap_pfn_range(vma, from, phys_base >> PAGE_SHIFT, size, prot);
	454	}
	455
f5e706ad SR	456	#define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
	457	#define ptep_set_access_flags(__vma, __address, __ptep, __entry, __dirty) \
	458	({ \
	459	int __changed = !pte_same(*(__ptep), __entry); \
	460	if (__changed) { \
	461	set_pte_at((__vma)->vm_mm, (__address), __ptep, __entry); \
	462	flush_tlb_page(__vma, __address); \
	463	} \
1ee0e144	464	__changed; \
f5e706ad SR	465	})
	466
	467	#include <asm-generic/pgtable.h>
	468
	469	#endif /* !(__ASSEMBLY__) */
	470
eb485d64	471	#define VMALLOC_START _AC(0xfe600000,UL)
eb485d64	472	#define VMALLOC_END _AC(0xffc00000,UL)
f5e706ad	473
f5e706ad SR	474	/* We provide our own get_unmapped_area to cope with VA holes for userland */
	475	#define HAVE_ARCH_UNMAPPED_AREA
	476
	477	/*
	478	* No page table caches to initialise
	479	*/
	480	#define pgtable_cache_init() do { } while (0)
	481
	482	#endif /* !(_SPARC_PGTABLE_H) */