1 files changed, 465 insertions, 0 deletions

diff --git a/include/asm-sparc/pgtable.h b/include/asm-sparc/pgtable.h
new file mode 100644
index 000000000000..373a6c327590
--- /dev/null
+++ b/include/asm-sparc/pgtable.h
@@ -0,0 +1,465 @@
+/* $Id: pgtable.h,v 1.110 2001/12/21 04:56:17 davem Exp $ */
+#ifndef _SPARC_PGTABLE_H
+#define _SPARC_PGTABLE_H
+
+/*  asm-sparc/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 <asm-generic/4level-fixup.h>
+
+#include <linux/config.h>
+#include <linux/spinlock.h>
+#include <linux/swap.h>
+#include <asm/types.h>
+#ifdef CONFIG_SUN4
+#include <asm/pgtsun4.h>
+#else
+#include <asm/pgtsun4c.h>
+#endif
+#include <asm/pgtsrmmu.h>
+#include <asm/vac-ops.h>
+#include <asm/oplib.h>
+#include <asm/btfixup.h>
+#include <asm/system.h>
+
+#ifndef __ASSEMBLY__
+
+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_shared)
+BTFIXUPDEF_INT(page_copy)
+BTFIXUPDEF_INT(page_readonly)
+BTFIXUPDEF_INT(page_kernel)
+
+#define PMD_SHIFT               SUN4C_PMD_SHIFT
+#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_PGD_NR       0
+#define PTE_SIZE                (PTRS_PER_PTE*4)
+
+#define PAGE_NONE      __pgprot(BTFIXUP_INT(page_none))
+#define PAGE_SHARED    __pgprot(BTFIXUP_INT(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];
+
+/* 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, pgd_t)
+
+#define pmd_page(pmd) BTFIXUP_CALL(pmd_page)(pmd)
+#define pgd_page(pgd) BTFIXUP_CALL(pgd_page)(pgd)
+
+BTFIXUPDEF_SETHI(none_mask)
+BTFIXUPDEF_CALL_CONST(int, pte_present, pte_t)
+BTFIXUPDEF_CALL(void, pte_clear, pte_t *)
+BTFIXUPDEF_CALL(int, pte_read, pte_t)
+
+extern __inline__ int pte_none(pte_t pte)
+{
+        return !(pte_val(pte) & ~BTFIXUP_SETHI(none_mask));
+}
+
+#define pte_present(pte) BTFIXUP_CALL(pte_present)(pte)
+#define pte_clear(mm,addr,pte) BTFIXUP_CALL(pte_clear)(pte)
+#define pte_read(pte) BTFIXUP_CALL(pte_read)(pte)
+
+BTFIXUPDEF_CALL_CONST(int, pmd_bad, pmd_t)
+BTFIXUPDEF_CALL_CONST(int, pmd_present, pmd_t)
+BTFIXUPDEF_CALL(void, pmd_clear, pmd_t *)
+
+extern __inline__ int pmd_none(pmd_t pmd)
+{
+        return !(pmd_val(pmd) & ~BTFIXUP_SETHI(none_mask));
+}
+
+#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)
+
+extern int pte_write(pte_t pte) __attribute_const__;
+extern __inline__ int pte_write(pte_t pte)
+{
+        return pte_val(pte) & BTFIXUP_HALF(pte_writei);
+}
+
+extern int pte_dirty(pte_t pte) __attribute_const__;
+extern __inline__ int pte_dirty(pte_t pte)
+{
+        return pte_val(pte) & BTFIXUP_HALF(pte_dirtyi);
+}
+
+extern int pte_young(pte_t pte) __attribute_const__;
+extern __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)
+
+extern int pte_file(pte_t pte) __attribute_const__;
+extern __inline__ int pte_file(pte_t pte)
+{
+        return pte_val(pte) & BTFIXUP_HALF(pte_filei);
+}
+
+/*
+ */
+BTFIXUPDEF_HALF(pte_wrprotecti)
+BTFIXUPDEF_HALF(pte_mkcleani)
+BTFIXUPDEF_HALF(pte_mkoldi)
+
+extern pte_t pte_wrprotect(pte_t pte) __attribute_const__;
+extern __inline__ pte_t pte_wrprotect(pte_t pte)
+{
+        return __pte(pte_val(pte) & ~BTFIXUP_HALF(pte_wrprotecti));
+}
+
+extern pte_t pte_mkclean(pte_t pte) __attribute_const__;
+extern __inline__ pte_t pte_mkclean(pte_t pte)
+{
+        return __pte(pte_val(pte) & ~BTFIXUP_HALF(pte_mkcleani));
+}
+
+extern pte_t pte_mkold(pte_t pte) __attribute_const__;
+extern __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 page_pte_prot(page, prot)       mk_pte(page, prot)
+#define page_pte(page)                  mk_pte(page, __pgprot(0))
+#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)
+
+BTFIXUPDEF_INT(pte_modify_mask)
+
+extern pte_t pte_modify(pte_t pte, pgprot_t newprot) __attribute_const__;
+extern __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,
+ * and sun4c is guaranteed to have no highmem anyway.
+ */
+#define pte_offset_map(d, a)            pte_offset_kernel(d,a)
+#define pte_offset_map_nested(d, a)     pte_offset_kernel(d,a)
+
+#define pte_unmap(pte)          do{}while(0)
+#define pte_unmap_nested(pte)   do{}while(0)
+
+/* The permissions for pgprot_val to make a page mapped on the obio space */
+extern unsigned int pg_iobits;
+
+/* 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,pte) BTFIXUP_CALL(update_mmu_cache)(vma,addr,pte)
+
+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 */
+BTFIXUPDEF_CALL(unsigned long, pte_to_pgoff, pte_t pte);
+BTFIXUPDEF_CALL(pte_t, pgoff_to_pte, unsigned long pgoff);
+
+#define pte_to_pgoff(pte) BTFIXUP_CALL(pte_to_pgoff)(pte)
+#define pgoff_to_pte(off) BTFIXUP_CALL(pgoff_to_pte)(off)
+
+/*
+ * This is made a constant because mm/fremap.c required a constant.
+ * Note that layout of these bits is different between sun4c.c and srmmu.c.
+ */
+#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
+
+extern __inline__ void remove_from_ctx_list(struct ctx_list *entry)
+{
+        entry->next->prev = entry->prev;
+        entry->prev->next = entry->next;
+}
+
+extern __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)
+
+extern __inline__ unsigned long
+__get_phys (unsigned long addr)
+{
+        switch (sparc_cpu_model){
+        case sun4:
+        case sun4c:
+                return sun4c_get_pte (addr) << PAGE_SHIFT;
+        case sun4m:
+        case sun4d:
+                return ((srmmu_get_pte (addr) & 0xffffff00) << 4);
+        default:
+                return 0;
+        }
+}
+
+extern __inline__ int
+__get_iospace (unsigned long addr)
+{
+        switch (sparc_cpu_model){
+        case sun4:
+        case sun4c:
+                return -1; /* Don't check iospace on sun4c */
+        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))
+
+extern int io_remap_page_range(struct vm_area_struct *vma,
+                               unsigned long from, unsigned long to,
+                               unsigned long size, pgprot_t prot, int space);
+extern int io_remap_pfn_range(struct vm_area_struct *vma,
+                              unsigned long from, unsigned long pfn,
+                              unsigned long size, pgprot_t prot);
+
+/*
+ * 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)
+
+#include <asm-generic/pgtable.h>
+
+#endif /* !(__ASSEMBLY__) */
+
+/* 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) */