sys/dev/acpica/Osd/OsdMemory.c

   1 /*-
   2  * Copyright (c) 2000 Mitsaru Iwasaki
   3  * Copyright (c) 2000 Michael Smith
   4  * Copyright (c) 2000 BSDi
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  *
  28  *      $FreeBSD: src/sys/dev/acpica/Osd/OsdMemory.c,v 1.10.2.1 2003/08/22 20:49:21 jhb Exp $
  29  *      $DragonFly: src/sys/dev/acpica/Osd/Attic/OsdMemory.c,v 1.2 2004/05/05 22:18:09 dillon Exp $
  30  */
  31
  32 /*
  33  * 6.2 : Memory Management
  34  */
  35
  36 #include "acpi.h"
  37
  38 #include <sys/kernel.h>
  39 #include <sys/malloc.h>
  40 #include <vm/vm.h>
  41 #include <vm/pmap.h>
  42
  43 static MALLOC_DEFINE(M_ACPICA, "acpica", "ACPI CA memory pool");
  44
  45 struct acpi_memtrack {
  46     struct acpi_memtrack *next;
  47     void *base;
  48     ACPI_SIZE size;
  49 };
  50
  51 typedef struct acpi_memtrack *acpi_memtrack_t;
  52
  53 static acpi_memtrack_t acpi_mapbase;
  54
  55 void *
  56 AcpiOsAllocate(ACPI_SIZE Size)
  57 {
  58     return(malloc(Size, M_ACPICA, M_INTWAIT));
  59 }
  60
  61 void
  62 AcpiOsFree (void *Memory)
  63 {
  64     free(Memory, M_ACPICA);
  65 }
  66
  67 ACPI_STATUS
  68 AcpiOsMapMemory (ACPI_PHYSICAL_ADDRESS PhysicalAddress, ACPI_SIZE Length, void **LogicalAddress)
  69 {
  70     acpi_memtrack_t track;
  71
  72     *LogicalAddress = pmap_mapdev((vm_offset_t)PhysicalAddress, Length);
  73     if (*LogicalAddress == NULL) {
  74         return(AE_BAD_ADDRESS);
  75     } else {
  76         track = malloc(sizeof(struct acpi_memtrack), M_ACPICA, M_INTWAIT);
  77         track->next = acpi_mapbase;
  78         track->base = *LogicalAddress;
  79         track->size = Length;
  80         acpi_mapbase = track;
  81     }
  82     return(AE_OK);
  83 }
  84
  85 void
  86 AcpiOsUnmapMemory (void *LogicalAddress, ACPI_SIZE Length)
  87 {
  88     struct acpi_memtrack **ptrack;
  89     acpi_memtrack_t track;
  90
  91 again:
  92     for (ptrack = &acpi_mapbase; (track = *ptrack); ptrack = &track->next) {
  93         /*
  94          * Exact match, degenerate case
  95          */
  96         if (track->base == LogicalAddress && track->size == Length) {
  97             *ptrack = track->next;
  98             pmap_unmapdev((vm_offset_t)track->base, track->size);
  99             free(track, M_ACPICA);
 100             return;
 101         }
 102         /*
 103          * Completely covered
 104          */
 105         if ((char *)LogicalAddress <= (char *)track->base &&
 106             (char *)LogicalAddress + Length >= (char *)track->base + track->size
 107         ) {
 108             *ptrack = track->next;
 109             pmap_unmapdev((vm_offset_t)track->base, track->size);
 110             printf("AcpiOsUnmapMemory: Warning, deallocation request too"
 111                    " large! %p/%08x (actual was %p/%08x)\n",
 112                    LogicalAddress, Length,
 113                    track->base, track->size);
 114             free(track, M_ACPICA);
 115             goto again;
 116         }
 117
 118         /*
 119          * Overlapping
 120          */
 121         if ((char *)LogicalAddress + Length >= (char *)track->base &&
 122             (char *)LogicalAddress < (char *)track->base + track->size
 123         ) {
 124             printf("AcpiOsUnmapMemory: Warning, deallocation did not "
 125                    "track allocation: %p/%08x (actual was %p/%08x)\n",
 126                    LogicalAddress, Length,
 127                    track->base, track->size);
 128         }
 129     }
 130     printf("AcpiOsUnmapMemory: Warning, broken ACPI, bad unmap: %p/%08x\n",
 131         LogicalAddress, Length);
 132 }
 133
 134 ACPI_STATUS
 135 AcpiOsGetPhysicalAddress(void *LogicalAddress, ACPI_PHYSICAL_ADDRESS *PhysicalAddress)
 136 {
 137     /* we can't necessarily do this, so cop out */
 138     return(AE_BAD_ADDRESS);
 139 }
 140
 141 /*
 142  * There is no clean way to do this.  We make the charitable assumption
 143  * that callers will not pass garbage to us.
 144  */
 145 BOOLEAN
 146 AcpiOsReadable (void *Pointer, UINT32 Length)
 147 {
 148     return(TRUE);
 149 }
 150
 151 BOOLEAN
 152 AcpiOsWritable (void *Pointer, UINT32 Length)
 153 {
 154     return(TRUE);
 155 }
 156
 157 ACPI_STATUS
 158 AcpiOsReadMemory (
 159     ACPI_PHYSICAL_ADDRESS       Address,
 160     void                        *Value,
 161     UINT32                      Width)
 162 {
 163     void        *LogicalAddress;
 164
 165     if (AcpiOsMapMemory(Address, Width / 8, &LogicalAddress) != AE_OK) {
 166         return(AE_NOT_EXIST);
 167     }
 168
 169     switch (Width) {
 170     case 8:
 171         *(u_int8_t *)Value = (*(volatile u_int8_t *)LogicalAddress);
 172         break;
 173     case 16:
 174         *(u_int16_t *)Value = (*(volatile u_int16_t *)LogicalAddress);
 175         break;
 176     case 32:
 177         *(u_int32_t *)Value = (*(volatile u_int32_t *)LogicalAddress);
 178         break;
 179     case 64:
 180         *(u_int64_t *)Value = (*(volatile u_int64_t *)LogicalAddress);
 181         break;
 182     default:
 183         /* debug trap goes here */
 184         break;
 185     }
 186
 187     AcpiOsUnmapMemory(LogicalAddress, Width / 8);
 188
 189     return(AE_OK);
 190 }
 191
 192 ACPI_STATUS
 193 AcpiOsWriteMemory (
 194     ACPI_PHYSICAL_ADDRESS       Address,
 195     ACPI_INTEGER                Value,
 196     UINT32                      Width)
 197 {
 198     void        *LogicalAddress;
 199
 200     if (AcpiOsMapMemory(Address, Width / 8, &LogicalAddress) != AE_OK) {
 201         return(AE_NOT_EXIST);
 202     }
 203
 204     switch (Width) {
 205     case 8:
 206         (*(volatile u_int8_t *)LogicalAddress) = Value & 0xff;
 207         break;
 208     case 16:
 209         (*(volatile u_int16_t *)LogicalAddress) = Value & 0xffff;
 210         break;
 211     case 32:
 212         (*(volatile u_int32_t *)LogicalAddress) = Value & 0xffffffff;
 213         break;
 214     case 64:
 215         (*(volatile u_int64_t *)LogicalAddress) = Value;
 216         break;
 217     default:
 218         /* debug trap goes here */
 219         break;
 220     }
 221
 222     AcpiOsUnmapMemory(LogicalAddress, Width / 8);
 223
 224     return(AE_OK);
 225 }