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

     /*-
      * Copyright (c) 2000, 2001 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.
     *
     * $FreeBSD: src/sys/dev/acpica/Osd/OsdHardware.c,v 1.13 2004/04/14 03:39:08 njl Exp $
     */
    
    /*
     * 6.7 : Hardware Abstraction
     */
    
    #include "acpi.h"
    
    #include <sys/bus.h>
    #include <bus/pci/pci_cfgreg.h>
    #include <bus/pci/pcireg.h>
    
    /*
     * ACPICA's rather gung-ho approach to hardware resource ownership is a little
     * troublesome insofar as there is no easy way for us to know in advance 
     * exactly which I/O resources it's going to want to use.
     * 
     * In order to deal with this, we ignore resource ownership entirely, and simply
     * use the native I/O space accessor functionality.  This is Evil, but it works.
     *
     * XXX use an intermediate #define for the tag/handle
     */
    
    #ifdef __i386__
    #define ACPI_BUS_SPACE_IO       I386_BUS_SPACE_IO
    #define ACPI_BUS_HANDLE         0
    #endif
    #ifdef __ia64__
    #define ACPI_BUS_SPACE_IO       IA64_BUS_SPACE_IO
    #define ACPI_BUS_HANDLE         0
    #endif
    #ifdef __x86_64__
    #define ACPI_BUS_SPACE_IO       X86_64_BUS_SPACE_IO
    #define ACPI_BUS_HANDLE         0
    #endif
    
    ACPI_STATUS
    AcpiOsReadPort(ACPI_IO_ADDRESS InPort, UINT32 *Value, UINT32 Width)
    {
        switch (Width) {
        case 8:
            *(u_int8_t *)Value = bus_space_read_1(ACPI_BUS_SPACE_IO,
                ACPI_BUS_HANDLE, InPort);
            break;
        case 16:
            *(u_int16_t *)Value = bus_space_read_2(ACPI_BUS_SPACE_IO,
                ACPI_BUS_HANDLE, InPort);
            break;
        case 32:
            *(u_int32_t *)Value = bus_space_read_4(ACPI_BUS_SPACE_IO,
                ACPI_BUS_HANDLE, InPort);
            break;
        default:
            /* debug trap goes here */
            break;
        }
    
        return (AE_OK);
    }
    
    ACPI_STATUS
    AcpiOsWritePort(ACPI_IO_ADDRESS OutPort, UINT32 Value, UINT32 Width)
    {
        switch (Width) {
        case 8:
            bus_space_write_1(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, OutPort, Value);
            break;
        case 16:
            bus_space_write_2(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, OutPort, Value);
            break;
        case 32:
            bus_space_write_4(ACPI_BUS_SPACE_IO, ACPI_BUS_HANDLE, OutPort, Value);
           break;
       default:
           /* debug trap goes here */
           break;
       }
   
       return (AE_OK);
   }
   
   ACPI_STATUS
   AcpiOsReadPciConfiguration(ACPI_PCI_ID *PciId, UINT32 Register, UINT64 *Value,
       UINT32 Width)
   {
       int bytes = Width / 8;
   
       if (Width == 64)
           return (AE_SUPPORT);
   
       if (!pci_cfgregopen())
           return (AE_NOT_EXIST);
   
       *Value = pci_cfgregread(PciId->Bus, PciId->Device,
                                         PciId->Function, Register, bytes);
       *Value &= (1 << (bytes * 8)) - 1;
   
       return (AE_OK);
   }
   
   
   ACPI_STATUS
   AcpiOsWritePciConfiguration(ACPI_PCI_ID *PciId, UINT32 Register,
       UINT64 Value, UINT32 Width)
   {
       if (Width == 64)
           return (AE_SUPPORT);
   
       if (!pci_cfgregopen())
           return (AE_NOT_EXIST);
   
       pci_cfgregwrite(PciId->Bus, PciId->Device, PciId->Function, Register,
                       (u_int32_t)Value, Width / 8); /* XXX casting */
   
       return (AE_OK);
   }

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