sys/arch/powerpc/include/ibm4xx/pmap.h

   1 /*      $NetBSD: pmap.h,v 1.13 2007/02/21 22:59:49 thorpej Exp $        */
   2
   3 /*
   4  * Copyright 2001 Wasabi Systems, Inc.
   5  * All rights reserved.
   6  *
   7  * Written by Eduardo Horvath and Simon Burge for Wasabi Systems, Inc.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. All advertising materials mentioning features or use of this software
  18  *    must display the following acknowledgement:
  19  *      This product includes software developed for the NetBSD Project by
  20  *      Wasabi Systems, Inc.
  21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
  22  *    or promote products derived from this software without specific prior
  23  *    written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
  26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
  29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  35  * POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 /*-
  39  * Copyright (C) 1995, 1996 Wolfgang Solfrank.
  40  * Copyright (C) 1995, 1996 TooLs GmbH.
  41  * All rights reserved.
  42  *
  43  * Redistribution and use in source and binary forms, with or without
  44  * modification, are permitted provided that the following conditions
  45  * are met:
  46  * 1. Redistributions of source code must retain the above copyright
  47  *    notice, this list of conditions and the following disclaimer.
  48  * 2. Redistributions in binary form must reproduce the above copyright
  49  *    notice, this list of conditions and the following disclaimer in the
  50  *    documentation and/or other materials provided with the distribution.
  51  * 3. All advertising materials mentioning features or use of this software
  52  *    must display the following acknowledgement:
  53  *      This product includes software developed by TooLs GmbH.
  54  * 4. The name of TooLs GmbH may not be used to endorse or promote products
  55  *    derived from this software without specific prior written permission.
  56  *
  57  * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
  58  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  59  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  60  * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  61  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  62  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  63  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  64  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  65  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  66  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  67  */
  68
  69 #ifndef _IBM4XX_PMAP_H_
  70 #define _IBM4XX_PMAP_H_
  71
  72 #include <powerpc/ibm4xx/tlb.h>
  73
  74 #define KERNEL_PID      1       /* TLB PID to use for kernel translation */
  75
  76 /*
  77  * A TTE is a 16KB or greater TLB entry w/size and endiannes bits
  78  * stuffed in the (unused) low bits of the PA.
  79  */
  80 #define TTE_PA_MASK             0xffffc000
  81 #define TTE_RPN_MASK(sz)        (~((1 << (10 + 2 * (sz))) - 1))
  82 #define TTE_ENDIAN              0x00002000
  83 #define TTE_SZ_MASK             0x00001c00
  84 #define TTE_SZ_SHIFT            10
  85
  86 /* TTE_SZ_1K and TTE_SZ_4K are not allowed. */
  87 #define TTE_SZ_16K      (TLB_SIZE_16K << TTE_SZ_SHIFT)
  88 #define TTE_SZ_64K      (TLB_SIZE_64K << TTE_SZ_SHIFT)
  89 #define TTE_SZ_256K     (TLB_SIZE_256K << TTE_SZ_SHIFT)
  90 #define TTE_SZ_1M       (TLB_SIZE_1M << TTE_SZ_SHIFT)
  91 #define TTE_SZ_4M       (TLB_SIZE_4M << TTE_SZ_SHIFT)
  92 #define TTE_SZ_16M      (TLB_SIZE_16M << TTE_SZ_SHIFT)
  93
  94 #define TTE_EX          TLB_EX
  95 #define TTE_WR          TLB_WR
  96 #define TTE_ZSEL_MASK   TLB_ZSEL_MASK
  97 #define TTE_ZSEL_SHFT   TLB_ZSEL_SHFT
  98 #define TTE_W           TLB_W
  99 #define TTE_I           TLB_I
 100 #define TTE_M           TLB_M
 101 #define TTE_G           TLB_G
 102
 103 #define ZONE_PRIV       0
 104 #define ZONE_USER       1
 105
 106 #define TTE_PA(p)       ((p)&TTE_PA_MASK)
 107 #define TTE_ZONE(z)     TLB_ZONE(z)
 108
 109 /*
 110  * Definitions for sizes of 1st and 2nd level page tables.
 111  *
 112  */
 113 #define PTSZ            (PAGE_SIZE / 4)
 114 #define PTMAP           (PTSZ * PAGE_SIZE)
 115 #define PTMSK           ((PTMAP - 1) & ~(PGOFSET))
 116
 117 #define PTIDX(v)        (((v) & PTMSK) >> PGSHIFT)
 118
 119 /* 2nd level tables map in any bits not mapped by 1st level tables. */
 120 #define STSZ            ((0xffffffffU / (PAGE_SIZE * PTSZ)) + 1)
 121 #define STMAP           (0xffffffffU)
 122 #define STMSK           (~(PTMAP - 1))
 123
 124 #define STIDX(v)        ((v) >> (PGSHIFT + 12))
 125
 126
 127 /*
 128  * Extra flags to pass to pmap_enter() -- make sure they don't conflict
 129  * w/PMAP_CANFAIL or PMAP_WIRED
 130  */
 131 #define PME_NOCACHE     0x100
 132 #define PME_WRITETHROUG 0x200
 133 #define PMAP_NC         PME_NOCACHE     /* XXX: OEA pmap compat. for bus_dma */
 134
 135 #ifndef _LOCORE
 136
 137 /*
 138  * Pmap stuff
 139  */
 140 struct pmap {
 141         volatile tlbpid_t pm_ctx;       /* PID to identify PMAP's entries in TLB */
 142         int pm_refs;                    /* ref count */
 143         struct pmap_statistics pm_stats; /* pmap statistics */
 144         volatile u_int *pm_ptbl[STSZ];  /* Array of 64 pointers to page tables. */
 145 };
 146
 147 #ifdef  _KERNEL
 148 #define PMAP_GROWKERNEL
 149
 150 #define PMAP_ATTR_REF           0x1
 151 #define PMAP_ATTR_CHG           0x2
 152
 153 #define pmap_clear_modify(pg)   (pmap_check_attr((pg), PMAP_ATTR_CHG, 1))
 154 #define pmap_clear_reference(pg)(pmap_check_attr((pg), PMAP_ATTR_REF, 1))
 155 #define pmap_is_modified(pg)    (pmap_check_attr((pg), PMAP_ATTR_CHG, 0))
 156 #define pmap_is_referenced(pg)  (pmap_check_attr((pg), PMAP_ATTR_REF, 0))
 157
 158 #define pmap_phys_address(x)            (x)
 159
 160 #define pmap_resident_count(pmap)       ((pmap)->pm_stats.resident_count)
 161 #define pmap_wired_count(pmap)          ((pmap)->pm_stats.wired_count)
 162
 163 void pmap_unwire(struct pmap *pm, vaddr_t va);
 164 void pmap_bootstrap(u_int kernelstart, u_int kernelend);
 165 bool pmap_extract(struct pmap *, vaddr_t, paddr_t *);
 166 bool pmap_check_attr(struct vm_page *, u_int, int);
 167 void pmap_real_memory(paddr_t *, psize_t *);
 168 int pmap_tlbmiss(vaddr_t va, int ctx);
 169
 170 static inline void
 171 pmap_remove_all(struct pmap *pmap)
 172 {
 173         /* Nothing. */
 174 }
 175
 176 int     ctx_alloc(struct pmap *);
 177 void    ctx_free(struct pmap *);
 178
 179 #define PMAP_NEED_PROCWR
 180 void pmap_procwr(struct proc *, vaddr_t, size_t);
 181
 182 /*
 183  * Alternate mapping hooks for pool pages.  Avoids thrashing the TLB.
 184  *
 185  * Note: This won't work if we have more memory than can be direct-mapped
 186  * VA==PA all at once.  But pmap_copy_page() and pmap_zero_page() will have
 187  * this problem, too.
 188  */
 189 #define PMAP_MAP_POOLPAGE(pa)   (pa)
 190 #define PMAP_UNMAP_POOLPAGE(pa) (pa)
 191
 192 static inline paddr_t vtophys(vaddr_t);
 193
 194 static inline paddr_t
 195 vtophys(vaddr_t va)
 196 {
 197         paddr_t pa;
 198
 199         /* XXX should check battable */
 200
 201         if (pmap_extract(pmap_kernel(), va, &pa))
 202                 return pa;
 203         return va;
 204 }
 205 #endif  /* _KERNEL */
 206 #endif  /* _LOCORE */
 207 #endif  /* _IBM4XX_PMAP_H_ */