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PGTABLE.H
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/* $Id: pgtable.h,v 1.103 1999/03/28 08:40:04 davem Exp $
* pgtable.h: SpitFire page table operations.
*
* Copyright 1996,1997 David S. Miller (davem@caip.rutgers.edu)
* Copyright 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
*/
#ifndef _SPARC64_PGTABLE_H
#define _SPARC64_PGTABLE_H
/* This file contains the functions and defines necessary to modify and use
* the SpitFire page tables.
*/
#ifndef __ASSEMBLY__
#include <linux/mm.h>
#include <linux/pagemap.h>
#endif
#include <asm/spitfire.h>
#include <asm/asi.h>
#include <asm/mmu_context.h>
#include <asm/system.h>
#ifndef __ASSEMBLY__
#include <asm/sbus.h>
/* Certain architectures need to do special things when pte's
* within a page table are directly modified. Thus, the following
* hook is made available.
*/
#define set_pte(pteptr, pteval) ((*(pteptr)) = (pteval))
/* PMD_SHIFT determines the size of the area a second-level page table can map */
#define PMD_SHIFT (PAGE_SHIFT + (PAGE_SHIFT-3))
#define PMD_SIZE (1UL << PMD_SHIFT)
#define PMD_MASK (~(PMD_SIZE-1))
/* PGDIR_SHIFT determines what a third-level page table entry can map */
#define PGDIR_SHIFT (PAGE_SHIFT + (PAGE_SHIFT-3) + (PAGE_SHIFT-2))
#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
#define PGDIR_MASK (~(PGDIR_SIZE-1))
/* Entries per page directory level. */
#define PTRS_PER_PTE (1UL << (PAGE_SHIFT-3))
/* We the first one in this file, what we export to the kernel
* is different so we can optimize correctly for 32-bit tasks.
*/
#define REAL_PTRS_PER_PMD (1UL << (PAGE_SHIFT-2))
#define PTRS_PER_PMD ((const int)((current->tss.flags & SPARC_FLAG_32BIT) ? \
(REAL_PTRS_PER_PMD >> 2) : (REAL_PTRS_PER_PMD)))
/* We cannot use the top 16G because VPTE table lives there. */
#define PTRS_PER_PGD ((1UL << (PAGE_SHIFT-3))-1)
/* Kernel has a separate 44bit address space. */
#define USER_PTRS_PER_PGD ((const int)((current->tss.flags & SPARC_FLAG_32BIT) ? \
(1) : (PTRS_PER_PGD)))
#define PTE_TABLE_SIZE 0x2000 /* 1024 entries 8 bytes each */
#define PMD_TABLE_SIZE 0x2000 /* 2048 entries 4 bytes each */
#define PGD_TABLE_SIZE 0x1000 /* 1024 entries 4 bytes each */
/* the no. of pointers that fit on a page */
#define PTRS_PER_PAGE (1UL << (PAGE_SHIFT-3))
/* NOTE: TLB miss handlers depend heavily upon where this is. */
#define VMALLOC_START 0x0000000140000000UL
#define VMALLOC_VMADDR(x) ((unsigned long)(x))
#define VMALLOC_END 0x0000000200000000UL
#endif /* !(__ASSEMBLY__) */
/* SpitFire TTE bits. */
#define _PAGE_VALID 0x8000000000000000 /* Valid TTE */
#define _PAGE_R 0x8000000000000000 /* Used to keep ref bit up to date */
#define _PAGE_SZ4MB 0x6000000000000000 /* 4MB Page */
#define _PAGE_SZ512K 0x4000000000000000 /* 512K Page */
#define _PAGE_SZ64K 0x2000000000000000 /* 64K Page */
#define _PAGE_SZ8K 0x0000000000000000 /* 8K Page */
#define _PAGE_NFO 0x1000000000000000 /* No Fault Only */
#define _PAGE_IE 0x0800000000000000 /* Invert Endianness */
#define _PAGE_SOFT2 0x07FC000000000000 /* Second set of software bits */
#define _PAGE_DIAG 0x0003FE0000000000 /* Diagnostic TTE bits */
#define _PAGE_PADDR 0x000001FFFFFFE000 /* Physical Address bits [40:13] */
#define _PAGE_SOFT 0x0000000000001F80 /* First set of software bits */
#define _PAGE_L 0x0000000000000040 /* Locked TTE */
#define _PAGE_CP 0x0000000000000020 /* Cacheable in Physical Cache */
#define _PAGE_CV 0x0000000000000010 /* Cacheable in Virtual Cache */
#define _PAGE_E 0x0000000000000008 /* side-Effect */
#define _PAGE_P 0x0000000000000004 /* Privileged Page */
#define _PAGE_W 0x0000000000000002 /* Writable */
#define _PAGE_G 0x0000000000000001 /* Global */
/* Here are the SpitFire software bits we use in the TTE's. */
#define _PAGE_MODIFIED 0x0000000000000800 /* Modified Page (ie. dirty) */
#define _PAGE_ACCESSED 0x0000000000000400 /* Accessed Page (ie. referenced) */
#define _PAGE_READ 0x0000000000000200 /* Readable SW Bit */
#define _PAGE_WRITE 0x0000000000000100 /* Writable SW Bit */
#define _PAGE_PRESENT 0x0000000000000080 /* Present Page (ie. not swapped out) */
#define _PAGE_CACHE (_PAGE_CP | _PAGE_CV)
#define __DIRTY_BITS (_PAGE_MODIFIED | _PAGE_WRITE | _PAGE_W)
#define __ACCESS_BITS (_PAGE_ACCESSED | _PAGE_READ | _PAGE_R)
#define __PRIV_BITS _PAGE_P
#define PAGE_NONE __pgprot (_PAGE_PRESENT | _PAGE_ACCESSED)
/* Don't set the TTE _PAGE_W bit here, else the dirty bit never gets set. */
#define PAGE_SHARED __pgprot (_PAGE_PRESENT | _PAGE_VALID | _PAGE_CACHE | \
__ACCESS_BITS | _PAGE_WRITE)
#define PAGE_COPY __pgprot (_PAGE_PRESENT | _PAGE_VALID | _PAGE_CACHE | \
__ACCESS_BITS)
#define PAGE_READONLY __pgprot (_PAGE_PRESENT | _PAGE_VALID | _PAGE_CACHE | \
__ACCESS_BITS)
#define PAGE_KERNEL __pgprot (_PAGE_PRESENT | _PAGE_VALID | _PAGE_CACHE | \
__PRIV_BITS | __ACCESS_BITS | __DIRTY_BITS)
#define PAGE_INVALID __pgprot (0)
#define _PFN_MASK _PAGE_PADDR
#define _PAGE_CHG_MASK (_PFN_MASK | _PAGE_MODIFIED | _PAGE_ACCESSED | _PAGE_PRESENT)
#define pg_iobits (_PAGE_VALID | _PAGE_PRESENT | __DIRTY_BITS | __ACCESS_BITS | _PAGE_E)
#define __P000 PAGE_NONE
#define __P001 PAGE_READONLY
#define __P010 PAGE_COPY
#define __P011 PAGE_COPY
#define __P100 PAGE_READONLY
#define __P101 PAGE_READONLY
#define __P110 PAGE_COPY
#define __P111 PAGE_COPY
#define __S000 PAGE_NONE
#define __S001 PAGE_READONLY
#define __S010 PAGE_SHARED
#define __S011 PAGE_SHARED
#define __S100 PAGE_READONLY
#define __S101 PAGE_READONLY
#define __S110 PAGE_SHARED
#define __S111 PAGE_SHARED
#ifndef __ASSEMBLY__
extern pte_t __bad_page(void);
#define BAD_PAGE __bad_page()
/* 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;
#define ZERO_PAGE ((unsigned long)__va(phys_base))
/* Allocate a block of RAM which is aligned to its size.
* This procedure can be used until the call to mem_init().
*/
extern void *sparc_init_alloc(unsigned long *kbrk, unsigned long size);
/* Cache and TLB flush operations. */
/* These are the same regardless of whether this is an SMP kernel or not. */
#define flush_cache_mm(mm) flushw_user()
#define flush_cache_range(mm, start, end) flushw_user()
#define flush_cache_page(vma, page) flushw_user()
/* These operations are unnecessary on the SpitFire since D-CACHE is write-through. */
#define flush_icache_range(start, end) do { } while (0)
#define flush_page_to_ram(page) do { } while (0)
extern void __flush_dcache_range(unsigned long start, unsigned long end);
extern void __flush_cache_all(void);
extern void __flush_tlb_all(void);
extern void __flush_tlb_mm(unsigned long context, unsigned long r);
extern void __flush_tlb_range(unsigned long context, unsigned long start,
unsigned long r, unsigned long end,
unsigned long pgsz, unsigned long size);
extern void __flush_tlb_page(unsigned long context, unsigned long page, unsigned long r);
#ifndef __SMP__
#define flush_cache_all() __flush_cache_all()
#define flush_tlb_all() __flush_tlb_all()
#define flush_tlb_mm(mm) \
do { if((mm)->context != NO_CONTEXT) \
__flush_tlb_mm((mm)->context & 0x3ff, SECONDARY_CONTEXT); \
} while(0)
#define flush_tlb_range(mm, start, end) \
do { if((mm)->context != NO_CONTEXT) { \
unsigned long __start = (start)&PAGE_MASK; \
unsigned long __end = (end)&PAGE_MASK; \
__flush_tlb_range((mm)->context & 0x3ff, __start, \
SECONDARY_CONTEXT, __end, PAGE_SIZE, \
(__end - __start)); \
} \
} while(0)
#define flush_tlb_page(vma, page) \
do { struct mm_struct *__mm = (vma)->vm_mm; \
if(__mm->context != NO_CONTEXT) \
__flush_tlb_page(__mm->context & 0x3ff, (page)&PAGE_MASK, \
SECONDARY_CONTEXT); \
} while(0)
#else /* __SMP__ */
extern void smp_flush_cache_all(void);
extern void smp_flush_tlb_all(void);
extern void smp_flush_tlb_mm(struct mm_struct *mm);
extern void smp_flush_tlb_range(struct mm_struct *mm, unsigned long start,
unsigned long end);
extern void smp_flush_tlb_page(struct mm_struct *mm, unsigned long page);
#define flush_cache_all() smp_flush_cache_all()
#define flush_tlb_all() smp_flush_tlb_all()
extern __inline__ void flush_tlb_mm(struct mm_struct *mm)
{
if(mm->context != NO_CONTEXT)
smp_flush_tlb_mm(mm);
}
extern __inline__ void flush_tlb_range(struct mm_struct *mm, unsigned long start,
unsigned long end)
{
if(mm->context != NO_CONTEXT)
smp_flush_tlb_range(mm, start, end);
}
extern __inline__ void flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
{
struct mm_struct *mm = vma->vm_mm;
if(mm->context != NO_CONTEXT)
smp_flush_tlb_page(mm, page);
}
#endif
#define mk_pte(page, pgprot) (__pte(__pa(page) | pgprot_val(pgprot)))
#define mk_pte_phys(physpage, pgprot) (__pte((physpage) | pgprot_val(pgprot)))
#define pte_modify(_pte, newprot) \
(pte_val(_pte) = ((pte_val(_pte) & _PAGE_CHG_MASK) | pgprot_val(newprot)))
#define pmd_set(pmdp, ptep) \
(pmd_val(*(pmdp)) = (__pa((unsigned long) (ptep)) >> 11UL))
#define pgd_set(pgdp, pmdp) \
(pgd_val(*(pgdp)) = (__pa((unsigned long) (pmdp)) >> 11UL))
#define pte_page(pte) ((unsigned long) __va(((pte_val(pte)&~PAGE_OFFSET)&~(0xfffUL))))
#define pmd_page(pmd) ((unsigned long) __va((pmd_val(pmd)<<11UL)))
#define pgd_page(pgd) ((unsigned long) __va((pgd_val(pgd)<<11UL)))
#define pte_none(pte) (!pte_val(pte))
#define pte_present(pte) (pte_val(pte) & _PAGE_PRESENT)
#define pte_clear(pte) (pte_val(*(pte)) = 0UL)
#define pmd_none(pmd) (!pmd_val(pmd))
#define pmd_bad(pmd) (0)
#define pmd_present(pmd) (pmd_val(pmd) != 0UL)
#define pmd_clear(pmdp) (pmd_val(*(pmdp)) = 0UL)
#define pgd_none(pgd) (!pgd_val(pgd))
#define pgd_bad(pgd) (0)
#define pgd_present(pgd) (pgd_val(pgd) != 0UL)
#define pgd_clear(pgdp) (pgd_val(*(pgdp)) = 0UL)
/* The following only work if pte_present() is true.
* Undefined behaviour if not..
*/
#define pte_read(pte) (pte_val(pte) & _PAGE_READ)
#define pte_write(pte) (pte_val(pte) & _PAGE_WRITE)
#define pte_dirty(pte) (pte_val(pte) & _PAGE_MODIFIED)
#define pte_young(pte) (pte_val(pte) & _PAGE_ACCESSED)
#define pte_wrprotect(pte) (__pte(pte_val(pte) & ~(_PAGE_WRITE|_PAGE_W)))
#define pte_rdprotect(pte) (__pte(((pte_val(pte)<<1UL)>>1UL) & ~_PAGE_READ))
#define pte_mkclean(pte) (__pte(pte_val(pte) & ~(_PAGE_MODIFIED|_PAGE_W)))
#define pte_mkold(pte) (__pte(((pte_val(pte)<<1UL)>>1UL) & ~_PAGE_ACCESSED))
/* Be very careful when you change these three, they are delicate. */
static __inline__ pte_t pte_mkyoung(pte_t _pte)
{ if(pte_val(_pte) & _PAGE_READ)
return __pte(pte_val(_pte)|(_PAGE_ACCESSED|_PAGE_R));
else
return __pte(pte_val(_pte)|(_PAGE_ACCESSED));
}
static __inline__ pte_t pte_mkwrite(pte_t _pte)
{ if(pte_val(_pte) & _PAGE_MODIFIED)
return __pte(pte_val(_pte)|(_PAGE_WRITE|_PAGE_W));
else
return __pte(pte_val(_pte)|(_PAGE_WRITE));
}
static __inline__ pte_t pte_mkdirty(pte_t _pte)
{ if(pte_val(_pte) & _PAGE_WRITE)
return __pte(pte_val(_pte)|(_PAGE_MODIFIED|_PAGE_W));
else
return __pte(pte_val(_pte)|(_PAGE_MODIFIED));
}
/* to find an entry in a page-table-directory. */
#define pgd_offset(mm, address) ((mm)->pgd + ((address >> PGDIR_SHIFT) & (PTRS_PER_PGD)))
/* 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.. */
#define pmd_offset(dir, address) ((pmd_t *) pgd_page(*(dir)) + \
((address >> PMD_SHIFT) & (REAL_PTRS_PER_PMD-1)))
/* Find an entry in the third-level page table.. */
#define pte_offset(dir, address) ((pte_t *) pmd_page(*(dir)) + \
((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)))
/* Very stupidly, we used to get new pgd's and pmd's, init their contents
* to point to the NULL versions of the next level page table, later on
* completely re-init them the same way, then free them up. This wasted
* a lot of work and caused unnecessary memory traffic. How broken...
* We fix this by caching them.
*/
#ifdef __SMP__
/* Sliiiicck */
#define pgt_quicklists cpu_data[smp_processor_id()]
#else
extern struct pgtable_cache_struct {
unsigned long *pgd_cache;
unsigned long *pte_cache;
unsigned int pgcache_size;
unsigned int pgdcache_size;
} pgt_quicklists;
#endif
#define pgd_quicklist (pgt_quicklists.pgd_cache)
#define pmd_quicklist ((unsigned long *)0)
#define pte_quicklist (pgt_quicklists.pte_cache)
#define pgtable_cache_size (pgt_quicklists.pgcache_size)
#define pgd_cache_size (pgt_quicklists.pgdcache_size)
#ifndef __SMP__
extern __inline__ void free_pgd_fast(pgd_t *pgd)
{
struct page *page = mem_map + MAP_NR(pgd);
if (!page->pprev_hash) {
(unsigned long *)page->next_hash = pgd_quicklist;
pgd_quicklist = (unsigned long *)page;
}
(unsigned long)page->pprev_hash |=
(((unsigned long)pgd & (PAGE_SIZE / 2)) ? 2 : 1);
pgd_cache_size++;
}
extern __inline__ pgd_t *get_pgd_fast(void)
{
struct page *ret;
if ((ret = (struct page *)pgd_quicklist) != NULL) {
unsigned long mask = (unsigned long)ret->pprev_hash;
unsigned long off = 0;
if (mask & 1)
mask &= ~1;
else {
off = PAGE_SIZE / 2;
mask &= ~2;
}
(unsigned long)ret->pprev_hash = mask;
if (!mask)
pgd_quicklist = (unsigned long *)ret->next_hash;
ret = (struct page *)(page_address(ret) + off);
pgd_cache_size--;
} else {
ret = (struct page *) __get_free_page(GFP_KERNEL);
if(ret) {
struct page *page = mem_map + MAP_NR(ret);
memset(ret, 0, PAGE_SIZE);
(unsigned long)page->pprev_hash = 2;
(unsigned long *)page->next_hash = pgd_quicklist;
pgd_quicklist = (unsigned long *)page;
pgd_cache_size++;
}
}
return (pgd_t *)ret;
}
#else /* __SMP__ */
extern __inline__ void free_pgd_fast(pgd_t *pgd)
{
*(unsigned long *)pgd = (unsigned long) pgd_quicklist;
pgd_quicklist = (unsigned long *) pgd;
pgtable_cache_size++;
}
extern __inline__ pgd_t *get_pgd_fast(void)
{
unsigned long *ret;
if((ret = pgd_quicklist) != NULL) {
pgd_quicklist = (unsigned long *)(*ret);
ret[0] = 0;
pgtable_cache_size--;
} else {
ret = (unsigned long *) __get_free_page(GFP_KERNEL);
if(ret)
memset(ret, 0, PAGE_SIZE);
}
return (pgd_t *)ret;
}
extern __inline__ void free_pgd_slow(pgd_t *pgd)
{
free_page((unsigned long)pgd);
}
#endif /* __SMP__ */
extern pmd_t *get_pmd_slow(pgd_t *pgd, unsigned long address_premasked);
extern __inline__ pmd_t *get_pmd_fast(void)
{
unsigned long *ret;
if((ret = (unsigned long *)pte_quicklist) != NULL) {
pte_quicklist = (unsigned long *)(*ret);
ret[0] = 0;
pgtable_cache_size--;
}
return (pmd_t *)ret;
}
extern __inline__ void free_pmd_fast(pgd_t *pmd)
{
*(unsigned long *)pmd = (unsigned long) pte_quicklist;
pte_quicklist = (unsigned long *) pmd;
pgtable_cache_size++;
}
extern __inline__ void free_pmd_slow(pmd_t *pmd)
{
free_page((unsigned long)pmd);
}
extern pte_t *get_pte_slow(pmd_t *pmd, unsigned long address_preadjusted);
extern __inline__ pte_t *get_pte_fast(void)
{
unsigned long *ret;
if((ret = (unsigned long *)pte_quicklist) != NULL) {
pte_quicklist = (unsigned long *)(*ret);
ret[0] = 0;
pgtable_cache_size--;
}
return (pte_t *)ret;
}
extern __inline__ void free_pte_fast(pte_t *pte)
{
*(unsigned long *)pte = (unsigned long) pte_quicklist;
pte_quicklist = (unsigned long *) pte;
pgtable_cache_size++;
}
extern __inline__ void free_pte_slow(pte_t *pte)
{
free_page((unsigned long)pte);
}
#define pte_free_kernel(pte) free_pte_fast(pte)
#define pte_free(pte) free_pte_fast(pte)
#define pmd_free_kernel(pmd) free_pmd_fast(pmd)
#define pmd_free(pmd) free_pmd_fast(pmd)
#define pgd_free(pgd) free_pgd_fast(pgd)
#define pgd_alloc() get_pgd_fast()
extern inline pte_t * pte_alloc(pmd_t *pmd, unsigned long address)
{
address = (address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1);
if (pmd_none(*pmd)) {
pte_t *page = get_pte_fast();
if (!page)
return get_pte_slow(pmd, address);
pmd_set(pmd, page);
return page + address;
}
return (pte_t *) pmd_page(*pmd) + address;
}
extern inline pmd_t * pmd_alloc(pgd_t *pgd, unsigned long address)
{
address = (address >> PMD_SHIFT) & (REAL_PTRS_PER_PMD - 1);
if (pgd_none(*pgd)) {
pmd_t *page = get_pmd_fast();
if (!page)
return get_pmd_slow(pgd, address);
pgd_set(pgd, page);
return page + address;
}
return (pmd_t *) pgd_page(*pgd) + address;
}
#define pte_alloc_kernel(pmd, addr) pte_alloc(pmd, addr)
#define pmd_alloc_kernel(pgd, addr) pmd_alloc(pgd, addr)
extern int do_check_pgt_cache(int, int);
/* Nothing to do on sparc64 :) */
#define set_pgdir(address, entry) do { } while(0)
extern pgd_t swapper_pg_dir[1];
extern inline void SET_PAGE_DIR(struct task_struct *tsk, pgd_t *pgdir)
{
if(pgdir != swapper_pg_dir && tsk == current) {
register unsigned long paddr asm("o5");
paddr = __pa(pgdir);
__asm__ __volatile__ ("
rdpr %%pstate, %%o4
wrpr %%o4, %1, %%pstate
mov %3, %%g4
mov %0, %%g7
stxa %%g0, [%%g4] %2
wrpr %%o4, 0x0, %%pstate
" : /* No outputs */
: "r" (paddr), "i" (PSTATE_MG|PSTATE_IE),
"i" (ASI_DMMU), "i" (TSB_REG)
: "o4");
flush_tlb_mm(current->mm);
}
}
/* Routines for getting a dvma scsi buffer. */
struct mmu_sglist {
char *addr;
char *__dont_touch;
unsigned int len;
__u32 dvma_addr;
};
extern __u32 mmu_get_scsi_one(char *, unsigned long, struct linux_sbus *sbus);
extern void mmu_get_scsi_sgl(struct mmu_sglist *, int, struct linux_sbus *sbus);
extern void mmu_release_scsi_one(u32 vaddr, unsigned long len,
struct linux_sbus *sbus);
extern void mmu_release_scsi_sgl(struct mmu_sglist *sg, int sz, struct linux_sbus *sbus);
#define NEED_DMA_SYNCHRONIZATION
#define mmu_sync_dma(dma_addr, len, sbus_instance) \
mmu_release_scsi_one((dma_addr), (len), (sbus_instance))
/* These do nothing with the way I have things setup. */
#define mmu_lockarea(vaddr, len) (vaddr)
#define mmu_unlockarea(vaddr, len) do { } while(0)
/* There used to be some funny code here which tried to guess which
* TLB wanted the mapping, that wasn't accurate enough to justify it's
* existance. The real way to do that is to have each TLB miss handler
* pass in a distinct code to do_sparc64_fault() and do it more accurately
* there.
*
* What we do need to handle here is prevent I-cache corruption. The
* deal is that the I-cache snoops stores from other CPUs and all DMA
* activity, however stores from the local processor are not snooped.
* The dynamic linker and our signal handler mechanism take care of
* the cases where they write into instruction space, but when a page
* is copied in the kernel and then executed in user-space is not handled
* right. This leads to corruptions if things are "just right", consider
* the following scenerio:
* 1) Process 1 frees up a page that was used for the PLT of libc in
* it's address space.
* 2) Process 2 writes into a page in the PLT of libc for the first
* time. do_wp_page() copies the page locally, the local I-cache of
* the processor does not notice the writes during the page copy.
* The new page used just so happens to be the one just freed in #1.
* 3) After the PLT write, later the cpu calls into an unresolved PLT
* entry, the CPU executes old instructions from process 1's PLT
* table.
* 4) Splat.
*/
extern void flush_icache_page(unsigned long phys_page);
#define update_mmu_cache(__vma, __address, _pte) \
do { \
unsigned short __flags = ((__vma)->vm_flags); \
if ((__flags & VM_EXEC) != 0 && \
((pte_val(_pte) & (_PAGE_PRESENT | _PAGE_WRITE | _PAGE_MODIFIED)) == \
(_PAGE_PRESENT | _PAGE_WRITE | _PAGE_MODIFIED))) { \
flush_icache_page(pte_page(_pte) - page_offset); \
} \
} while(0)
/* Make a non-present pseudo-TTE. */
extern inline pte_t mk_swap_pte(unsigned long type, unsigned long offset)
{ pte_t pte; pte_val(pte) = (type<<PAGE_SHIFT)|(offset<<(PAGE_SHIFT+8)); return pte; }
extern inline pte_t mk_pte_io(unsigned long page, pgprot_t prot, int space)
{
pte_t pte;
pte_val(pte) = ((page) | pgprot_val(prot) | _PAGE_E) & ~(unsigned long)_PAGE_CACHE;
pte_val(pte) |= (((unsigned long)space) << 32);
return pte;
}
#define SWP_TYPE(entry) (((entry>>PAGE_SHIFT) & 0xff))
#define SWP_OFFSET(entry) ((entry) >> (PAGE_SHIFT+8))
#define SWP_ENTRY(type,offset) pte_val(mk_swap_pte((type),(offset)))
extern __inline__ unsigned long
sun4u_get_pte (unsigned long addr)
{
pgd_t *pgdp;
pmd_t *pmdp;
pte_t *ptep;
if (addr >= PAGE_OFFSET)
return addr & _PAGE_PADDR;
pgdp = pgd_offset_k (addr);
pmdp = pmd_offset (pgdp, addr);
ptep = pte_offset (pmdp, addr);
return pte_val (*ptep) & _PAGE_PADDR;
}
extern __inline__ unsigned long
__get_phys (unsigned long addr)
{
return sun4u_get_pte (addr);
}
extern __inline__ int
__get_iospace (unsigned long addr)
{
return ((sun4u_get_pte (addr) & 0xf0000000) >> 28);
}
extern void * module_map (unsigned long size);
extern void module_unmap (void *addr);
extern unsigned long *sparc64_valid_addr_bitmap;
/* Needs to be defined here and not in linux/mm.h, as it is arch dependent */
#define PageSkip(page) (test_bit(PG_skip, &(page)->flags))
#define kern_addr_valid(addr) (test_bit(__pa((unsigned long)(addr))>>22, sparc64_valid_addr_bitmap))
extern int io_remap_page_range(unsigned long from, unsigned long offset,
unsigned long size, pgprot_t prot, int space);
#endif /* !(__ASSEMBLY__) */
#endif /* !(_SPARC64_PGTABLE_H) */