The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/acpica/Osd/OsdMemory.c

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    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 
   29 /*
   30  * 6.2 : Memory Management
   31  */
   32 
   33 #include <sys/cdefs.h>
   34 __FBSDID("$FreeBSD$");
   35 
   36 #include <contrib/dev/acpica/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 MALLOC_DEFINE(M_ACPICA, "acpica", "ACPI CA memory pool");
   44 
   45 void *
   46 AcpiOsAllocate(ACPI_SIZE Size)
   47 {
   48     return (malloc(Size, M_ACPICA, M_NOWAIT));
   49 }
   50 
   51 void
   52 AcpiOsFree(void *Memory)
   53 {
   54     free(Memory, M_ACPICA);
   55 }
   56 
   57 void *
   58 AcpiOsMapMemory(ACPI_PHYSICAL_ADDRESS PhysicalAddress, ACPI_NATIVE_UINT Length)
   59 {
   60     return (pmap_mapbios((vm_offset_t)PhysicalAddress, Length));
   61 }
   62 
   63 void
   64 AcpiOsUnmapMemory(void *LogicalAddress, ACPI_SIZE Length)
   65 {
   66     pmap_unmapbios((vm_offset_t)LogicalAddress, Length);
   67 }
   68 
   69 ACPI_STATUS
   70 AcpiOsGetPhysicalAddress(void *LogicalAddress,
   71     ACPI_PHYSICAL_ADDRESS *PhysicalAddress)
   72 {
   73     /* We can't necessarily do this, so cop out. */
   74     return (AE_BAD_ADDRESS);
   75 }
   76 
   77 ACPI_STATUS
   78 AcpiOsValidateInterface (char *Interface)
   79 {
   80     return (AE_SUPPORT);
   81 }
   82 
   83 /*
   84  * There is no clean way to do this.  We make the charitable assumption
   85  * that callers will not pass garbage to us.
   86  */
   87 ACPI_STATUS
   88 AcpiOsValidateAddress (UINT8 SpaceId, ACPI_PHYSICAL_ADDRESS Address,
   89     ACPI_SIZE Length)
   90 {
   91     return (AE_OK);
   92 }
   93 
   94 BOOLEAN
   95 AcpiOsReadable (void *Pointer, ACPI_SIZE Length)
   96 {
   97     return (TRUE);
   98 }
   99 
  100 BOOLEAN
  101 AcpiOsWritable (void *Pointer, ACPI_SIZE Length)
  102 {
  103     return (TRUE);
  104 }
  105 
  106 ACPI_STATUS
  107 AcpiOsReadMemory(ACPI_PHYSICAL_ADDRESS Address, UINT32 *Value, UINT32 Width)
  108 {
  109     void        *LogicalAddress;
  110 
  111     LogicalAddress = AcpiOsMapMemory(Address, Width / 8);
  112     if (LogicalAddress == NULL)
  113         return (AE_NOT_EXIST);
  114 
  115     switch (Width) {
  116     case 8:
  117         *(u_int8_t *)Value = (*(volatile u_int8_t *)LogicalAddress);
  118         break;
  119     case 16:
  120         *(u_int16_t *)Value = (*(volatile u_int16_t *)LogicalAddress);
  121         break;
  122     case 32:
  123         *(u_int32_t *)Value = (*(volatile u_int32_t *)LogicalAddress);
  124         break;
  125     case 64:
  126         *(u_int64_t *)Value = (*(volatile u_int64_t *)LogicalAddress);
  127         break;
  128     default:
  129         /* debug trap goes here */
  130         break;
  131     }
  132 
  133     AcpiOsUnmapMemory(LogicalAddress, Width / 8);
  134 
  135     return (AE_OK);
  136 }
  137 
  138 ACPI_STATUS
  139 AcpiOsWriteMemory(ACPI_PHYSICAL_ADDRESS Address, UINT32 Value, UINT32 Width)
  140 {
  141     void        *LogicalAddress;
  142 
  143     LogicalAddress = AcpiOsMapMemory(Address, Width / 8);
  144     if (LogicalAddress == NULL)
  145         return (AE_NOT_EXIST);
  146 
  147     switch (Width) {
  148     case 8:
  149         (*(volatile u_int8_t *)LogicalAddress) = Value & 0xff;
  150         break;
  151     case 16:
  152         (*(volatile u_int16_t *)LogicalAddress) = Value & 0xffff;
  153         break;
  154     case 32:
  155         (*(volatile u_int32_t *)LogicalAddress) = Value & 0xffffffff;
  156         break;
  157     case 64:
  158         (*(volatile u_int64_t *)LogicalAddress) = Value;
  159         break;
  160     default:
  161         /* debug trap goes here */
  162         break;
  163     }
  164 
  165     AcpiOsUnmapMemory(LogicalAddress, Width / 8);
  166 
  167     return (AE_OK);
  168 }

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