patch-2.3.29 linux/include/asm-alpha/pgtable.h

• Lines: 444
• Date: Tue Nov 23 10:10:38 1999
• Orig file: v2.3.28/linux/include/asm-alpha/pgtable.h
• Orig date: Fri Oct 15 15:25:14 1999

diff -u --recursive --new-file v2.3.28/linux/include/asm-alpha/pgtable.h linux/include/asm-alpha/pgtable.h
@@ -9,165 +9,11 @@
  * in <asm/page.h> (currently 8192).
  */
 #include <linux/config.h>
-#include <linux/spinlock.h>	/* For the task lock */
 
-#include <asm/system.h>
+#include <asm/page.h>
 #include <asm/processor.h>	/* For TASK_SIZE */
-#include <asm/mmu_context.h>
 #include <asm/machvec.h>
 
-
-/* Caches aren't brain-dead on the Alpha. */
-#define flush_cache_all()			do { } while (0)
-#define flush_cache_mm(mm)			do { } while (0)
-#define flush_cache_range(mm, start, end)	do { } while (0)
-#define flush_cache_page(vma, vmaddr)		do { } while (0)
-#define flush_page_to_ram(page)			do { } while (0)
-#define flush_icache_range(start, end)		do { } while (0)
-
-/*
- * Use a few helper functions to hide the ugly broken ASN
- * numbers on early Alphas (ev4 and ev45)
- */
-
-#ifndef __EXTERN_INLINE
-#define __EXTERN_INLINE extern inline
-#define __MMU_EXTERN_INLINE
-#endif
-
-__EXTERN_INLINE void
-ev4_flush_tlb_current(struct mm_struct *mm)
-{
-	tbiap();
-}
-
-__EXTERN_INLINE void
-ev4_flush_tlb_other(struct mm_struct *mm)
-{
-}
-
-extern void ev5_flush_tlb_current(struct mm_struct *mm);
-
-__EXTERN_INLINE void
-ev5_flush_tlb_other(struct mm_struct *mm)
-{
-	mm->context = 0;
-}
-
-/*
- * Flush just one page in the current TLB set.
- * We need to be very careful about the icache here, there
- * is no way to invalidate a specific icache page..
- */
-
-__EXTERN_INLINE void
-ev4_flush_tlb_current_page(struct mm_struct * mm,
-			   struct vm_area_struct *vma,
-			   unsigned long addr)
-{
-	tbi(2 + ((vma->vm_flags & VM_EXEC) != 0), addr);
-}
-
-__EXTERN_INLINE void
-ev5_flush_tlb_current_page(struct mm_struct * mm,
-			   struct vm_area_struct *vma,
-			   unsigned long addr)
-{
-	if (vma->vm_flags & VM_EXEC)
-		ev5_flush_tlb_current(mm);
-	else
-		tbi(2, addr);
-}
-
-
-#ifdef CONFIG_ALPHA_GENERIC
-# define flush_tlb_current		alpha_mv.mv_flush_tlb_current
-# define flush_tlb_other		alpha_mv.mv_flush_tlb_other
-# define flush_tlb_current_page		alpha_mv.mv_flush_tlb_current_page
-#else
-# ifdef CONFIG_ALPHA_EV4
-#  define flush_tlb_current		ev4_flush_tlb_current
-#  define flush_tlb_other		ev4_flush_tlb_other
-#  define flush_tlb_current_page	ev4_flush_tlb_current_page
-# else
-#  define flush_tlb_current		ev5_flush_tlb_current
-#  define flush_tlb_other		ev5_flush_tlb_other
-#  define flush_tlb_current_page	ev5_flush_tlb_current_page
-# endif
-#endif
-
-#ifdef __MMU_EXTERN_INLINE
-#undef __EXTERN_INLINE
-#undef __MMU_EXTERN_INLINE
-#endif
-
-/*
- * Flush current user mapping.
- */
-static inline void flush_tlb(void)
-{
-	flush_tlb_current(current->mm);
-}
-
-#ifndef __SMP__
-/*
- * Flush everything (kernel mapping may also have
- * changed due to vmalloc/vfree)
- */
-static inline void flush_tlb_all(void)
-{
-	tbia();
-}
-
-/*
- * Flush a specified user mapping
- */
-static inline void flush_tlb_mm(struct mm_struct *mm)
-{
-	if (mm != current->mm)
-		flush_tlb_other(mm);
-	else
-		flush_tlb_current(mm);
-}
-
-/*
- * Page-granular tlb flush.
- *
- * do a tbisd (type = 2) normally, and a tbis (type = 3)
- * if it is an executable mapping.  We want to avoid the
- * itlb flush, because that potentially also does a
- * icache flush.
- */
-static inline void flush_tlb_page(struct vm_area_struct *vma,
-	unsigned long addr)
-{
-	struct mm_struct * mm = vma->vm_mm;
-
-	if (mm != current->mm)
-		flush_tlb_other(mm);
-	else
-		flush_tlb_current_page(mm, vma, addr);
-}
-
-/*
- * Flush a specified range of user mapping:  on the
- * Alpha we flush the whole user tlb.
- */
-static inline void flush_tlb_range(struct mm_struct *mm,
-	unsigned long start, unsigned long end)
-{
-	flush_tlb_mm(mm);
-}
-
-#else /* __SMP__ */
-
-extern void flush_tlb_all(void);
-extern void flush_tlb_mm(struct mm_struct *);
-extern void flush_tlb_page(struct vm_area_struct *, unsigned long);
-extern void flush_tlb_range(struct mm_struct *, unsigned long, unsigned long);
-
-#endif /* __SMP__ */
-
 /* Certain architectures need to do special things when PTEs
  * within a page table are directly modified.  Thus, the following
  * hook is made available.
@@ -293,7 +139,7 @@
 
 #define BAD_PAGETABLE	__bad_pagetable()
 #define BAD_PAGE	__bad_page()
-#define ZERO_PAGE(vaddr)	(PAGE_OFFSET+0x30A000)
+#define ZERO_PAGE(vaddr)	(mem_map + MAP_NR(ZERO_PGE))
 
 /* number of bits that fit into a memory pointer */
 #define BITS_PER_PTR			(8*sizeof(unsigned long))
@@ -330,8 +176,14 @@
  * Conversion functions:  convert a page and protection to a page entry,
  * and a page entry and page directory to the page they refer to.
  */
-extern inline pte_t mk_pte(unsigned long page, pgprot_t pgprot)
-{ pte_t pte; pte_val(pte) = ((page-PAGE_OFFSET) << (32-PAGE_SHIFT)) | pgprot_val(pgprot); return pte; }
+#define mk_pte(page, pgprot)						\
+({									\
+	pte_t pte;							\
+									\
+	pte_val(pte) = ((unsigned long)(page - mem_map) << 32) |	\
+		       pgprot_val(pgprot);				\
+	pte;								\
+})
 
 extern inline pte_t mk_pte_phys(unsigned long physpage, pgprot_t pgprot)
 { pte_t pte; pte_val(pte) = (PHYS_TWIDDLE(physpage) << (32-PAGE_SHIFT)) | pgprot_val(pgprot); return pte; }
@@ -345,8 +197,8 @@
 extern inline void pgd_set(pgd_t * pgdp, pmd_t * pmdp)
 { pgd_val(*pgdp) = _PAGE_TABLE | ((((unsigned long) pmdp) - PAGE_OFFSET) << (32-PAGE_SHIFT)); }
 
-extern inline unsigned long pte_page(pte_t pte)
-{ return PAGE_OFFSET + ((pte_val(pte) & _PFN_MASK) >> (32-PAGE_SHIFT)); }
+#define pte_pagenr(x)	((unsigned long)((pte_val(x) >> 32)))
+#define pte_page(x)	(mem_map+pte_pagenr(x))
 
 extern inline unsigned long pmd_page(pmd_t pmd)
 { return PAGE_OFFSET + ((pmd_val(pmd) & _PFN_MASK) >> (32-PAGE_SHIFT)); }
@@ -368,6 +220,9 @@
 extern inline int pgd_present(pgd_t pgd)	{ return pgd_val(pgd) & _PAGE_VALID; }
 extern inline void pgd_clear(pgd_t * pgdp)	{ pgd_val(*pgdp) = 0; }
 
+#define page_address(page)	((page)->virtual)
+#define __page_address(page)	(PAGE_OFFSET + (((page) - mem_map) << PAGE_SHIFT))
+
 /*
  * The following only work if pte_present() is true.
  * Undefined behaviour if not..
@@ -395,10 +250,8 @@
 #define pgd_offset_k(address) pgd_offset(&init_mm, address)
 
 /* to find an entry in a page-table-directory. */
-extern inline pgd_t * pgd_offset(struct mm_struct * mm, unsigned long address)
-{
-	return mm->pgd + ((address >> PGDIR_SHIFT) & (PTRS_PER_PAGE - 1));
-}
+#define __pgd_offset(address)	((address >> PGDIR_SHIFT) & (PTRS_PER_PGD-1))
+#define pgd_offset(mm, address)	((mm)->pgd+__pgd_offset(address))
 
 /* Find an entry in the second-level page table.. */
 extern inline pmd_t * pmd_offset(pgd_t * dir, unsigned long address)
@@ -412,186 +265,6 @@
 	return (pte_t *) pmd_page(*dir) + ((address >> PAGE_SHIFT) & (PTRS_PER_PAGE - 1));
 }
 
-/*      
- * Allocate and free page tables. The xxx_kernel() versions are
- * used to allocate a kernel page table - this turns on ASN bits
- * if any.
- */
-#ifndef __SMP__
-extern struct pgtable_cache_struct {
-	unsigned long *pgd_cache;
-	unsigned long *pte_cache;
-	unsigned long pgtable_cache_sz;
-} quicklists;
-#else
-#include <asm/smp.h>
-#define quicklists cpu_data[smp_processor_id()]
-#endif
-#define pgd_quicklist (quicklists.pgd_cache)
-#define pmd_quicklist ((unsigned long *)0)
-#define pte_quicklist (quicklists.pte_cache)
-#define pgtable_cache_size (quicklists.pgtable_cache_sz)
-
-extern __inline__ pgd_t *get_pgd_slow(void)
-{
-	pgd_t *ret = (pgd_t *)__get_free_page(GFP_KERNEL), *init;
-	
-	if (ret) {
-		init = pgd_offset(&init_mm, 0);
-		memset (ret, 0, USER_PTRS_PER_PGD * sizeof(pgd_t));
-		memcpy (ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
-			(PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
-
-		pgd_val(ret[PTRS_PER_PGD])
-		  = pte_val(mk_pte((unsigned long)ret, PAGE_KERNEL));
-	}
-	return ret;
-}
-
-extern __inline__ pgd_t *get_pgd_fast(void)
-{
-	unsigned long *ret;
-
-	if((ret = pgd_quicklist) != NULL) {
-		pgd_quicklist = (unsigned long *)(*ret);
-		ret[0] = ret[1];
-		pgtable_cache_size--;
-	} else
-		ret = (unsigned long *)get_pgd_slow();
-	return (pgd_t *)ret;
-}
-
-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__ void free_pgd_slow(pgd_t *pgd)
-{
-	free_page((unsigned long)pgd);
-}
-
-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] = ret[1];
-		pgtable_cache_size--;
-	}
-	return (pmd_t *)ret;
-}
-
-extern __inline__ void free_pmd_fast(pmd_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] = ret[1];
-		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);
-}
-
-extern void __bad_pte(pmd_t *pmd);
-extern void __bad_pmd(pgd_t *pgd);
-
-#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;
-	}
-	if (pmd_bad(*pmd)) {
-		__bad_pte(pmd);
-		return NULL;
-	}
-	return (pte_t *) pmd_page(*pmd) + address;
-}
-
-extern inline pmd_t * pmd_alloc(pgd_t *pgd, unsigned long address)
-{
-	address = (address >> PMD_SHIFT) & (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;
-	}
-	if (pgd_bad(*pgd)) {
-		__bad_pmd(pgd);
-		return NULL;
-	}
-	return (pmd_t *) pgd_page(*pgd) + address;
-}
-
-#define pte_alloc_kernel	pte_alloc
-#define pmd_alloc_kernel	pmd_alloc
-
-extern int do_check_pgt_cache(int, int);
-
-extern inline void set_pgdir(unsigned long address, pgd_t entry)
-{
-	struct task_struct * p;
-	pgd_t *pgd;
-        
-	read_lock(&tasklist_lock);
-	for_each_task(p) {
-		if (!p->mm)
-			continue;
-		*pgd_offset(p->mm,address) = entry;
-	}
-	read_unlock(&tasklist_lock);
-	for (pgd = (pgd_t *)pgd_quicklist; pgd; pgd = (pgd_t *)*(unsigned long *)pgd)
-		pgd[(address >> PGDIR_SHIFT) & (PTRS_PER_PAGE - 1)] = entry;
-}
-
 extern pgd_t swapper_pg_dir[1024];
 
 /*
@@ -610,9 +283,11 @@
 extern inline pte_t mk_swap_pte(unsigned long type, unsigned long offset)
 { pte_t pte; pte_val(pte) = (type << 32) | (offset << 40); return pte; }
 
-#define SWP_TYPE(entry) (((entry) >> 32) & 0xff)
-#define SWP_OFFSET(entry) ((entry) >> 40)
-#define SWP_ENTRY(type,offset) pte_val(mk_swap_pte((type),(offset)))
+#define SWP_TYPE(x)			(((x).val >> 32) & 0xff)
+#define SWP_OFFSET(x)			((x).val >> 40)
+#define SWP_ENTRY(type, offset)		((swp_entry_t) { pte_val(mk_swap_pte((type),(offset))) })
+#define pte_to_swp_entry(pte)		((swp_entry_t) { pte_val(pte) })
+#define swp_entry_to_pte(x)		((pte_t) { (x).val })
 
 #define module_map	vmalloc
 #define module_unmap	vfree
@@ -622,6 +297,13 @@
 #define kern_addr_valid(addr)	(1)
 
 #define io_remap_page_range(start, busaddr, size, prot) \
-	remap_page_range(start, virt_to_phys(__ioremap(busaddr)), size, prot)
+	remap_page_range(start, virt_to_phys(__ioremap(busaddr), 0), size, prot)
+
+#define pte_ERROR(e) \
+	printk("%s:%d: bad pte %016lx.\n", __FILE__, __LINE__, pte_val(e))
+#define pmd_ERROR(e) \
+	printk("%s:%d: bad pmd %016lx.\n", __FILE__, __LINE__, pmd_val(e))
+#define pgd_ERROR(e) \
+	printk("%s:%d: bad pgd %016lx.\n", __FILE__, __LINE__, pgd_val(e))
 
 #endif /* _ALPHA_PGTABLE_H */