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

     /*-
      * Copyright (c) 2000 Mitsaru Iwasaki
      * Copyright (c) 2000 Michael Smith
      * Copyright (c) 2000 BSDi
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     */
    
    /*
     * 6.2 : Memory Management
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD: releng/10.4/sys/dev/acpica/Osd/OsdMemory.c 231844 2012-02-16 22:59:29Z jkim $");
    
    #include <contrib/dev/acpica/include/acpi.h>
    
    #include <sys/kernel.h>
    #include <sys/malloc.h>
    #include <vm/vm.h>
    #include <vm/pmap.h>
    
    static MALLOC_DEFINE(M_ACPICA, "acpica", "ACPI CA memory pool");
    
    void *
    AcpiOsAllocate(ACPI_SIZE Size)
    {
        return (malloc(Size, M_ACPICA, M_NOWAIT));
    }
    
    void
    AcpiOsFree(void *Memory)
    {
        free(Memory, M_ACPICA);
    }
    
    void *
    AcpiOsMapMemory(ACPI_PHYSICAL_ADDRESS PhysicalAddress, ACPI_SIZE Length)
    {
        return (pmap_mapbios((vm_offset_t)PhysicalAddress, Length));
    }
    
    void
    AcpiOsUnmapMemory(void *LogicalAddress, ACPI_SIZE Length)
    {
        pmap_unmapbios((vm_offset_t)LogicalAddress, Length);
    }
    
    ACPI_STATUS
    AcpiOsGetPhysicalAddress(void *LogicalAddress,
        ACPI_PHYSICAL_ADDRESS *PhysicalAddress)
    {
        /* We can't necessarily do this, so cop out. */
        return (AE_BAD_ADDRESS);
    }
    
    BOOLEAN
    AcpiOsReadable (void *Pointer, ACPI_SIZE Length)
    {
        return (TRUE);
    }
    
    BOOLEAN
    AcpiOsWritable (void *Pointer, ACPI_SIZE Length)
    {
        return (TRUE);
    }
    
    ACPI_STATUS
    AcpiOsReadMemory(ACPI_PHYSICAL_ADDRESS Address, UINT64 *Value, UINT32 Width)
    {
        void        *LogicalAddress;
    
        LogicalAddress = pmap_mapdev(Address, Width / 8);
        if (LogicalAddress == NULL)
            return (AE_NOT_EXIST);
    
        switch (Width) {
        case 8:
           *Value = *(volatile uint8_t *)LogicalAddress;
           break;
       case 16:
           *Value = *(volatile uint16_t *)LogicalAddress;
           break;
       case 32:
           *Value = *(volatile uint32_t *)LogicalAddress;
           break;
       case 64:
           *Value = *(volatile uint64_t *)LogicalAddress;
           break;
       }
   
       pmap_unmapdev((vm_offset_t)LogicalAddress, Width / 8);
   
       return (AE_OK);
   }
   
   ACPI_STATUS
   AcpiOsWriteMemory(ACPI_PHYSICAL_ADDRESS Address, UINT64 Value, UINT32 Width)
   {
       void        *LogicalAddress;
   
       LogicalAddress = pmap_mapdev(Address, Width / 8);
       if (LogicalAddress == NULL)
           return (AE_NOT_EXIST);
   
       switch (Width) {
       case 8:
           *(volatile uint8_t *)LogicalAddress = Value;
           break;
       case 16:
           *(volatile uint16_t *)LogicalAddress = Value;
           break;
       case 32:
           *(volatile uint32_t *)LogicalAddress = Value;
           break;
       case 64:
           *(volatile uint64_t *)LogicalAddress = Value;
           break;
       }
   
       pmap_unmapdev((vm_offset_t)LogicalAddress, Width / 8);
   
       return (AE_OK);
   }

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