acpi_package.c

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    1 /*-
    2  * Copyright (c) 2003 Nate Lawson
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  * $FreeBSD: releng/5.2/sys/dev/acpica/acpi_package.c 122765 2003-11-15 19:20:46Z njl $
   27  */
   28 
   29 #include <sys/param.h>
   30 #include <sys/kernel.h>
   31 #include <sys/bus.h>
   32 #include <sys/sbuf.h>
   33 
   34 #include <machine/bus_pio.h>
   35 #include <machine/bus.h>
   36 #include <machine/resource.h>
   37 #include <sys/rman.h>
   38 
   39 #include "acpi.h"
   40 #include <dev/acpica/acpivar.h>
   41 
   42 /*
   43  * Package manipulation convenience functions
   44  */
   45 
   46 int
   47 acpi_PkgInt(device_t dev, ACPI_OBJECT *res, int idx, ACPI_INTEGER *dst)
   48 {
   49     ACPI_OBJECT         *obj;
   50 
   51     obj = &res->Package.Elements[idx];
   52     if (obj == NULL || obj->Type != ACPI_TYPE_INTEGER) {
   53         ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
   54                     "PkgInt error, pkg[%d] at %d %p\n",
   55                     res->Package.Count, idx, obj);
   56         return (-1);
   57     }
   58 
   59     *dst = obj->Integer.Value;
   60     return (0);
   61 }
   62 
   63 int
   64 acpi_PkgInt32(device_t dev, ACPI_OBJECT *res, int idx, uint32_t *dst)
   65 {
   66     ACPI_INTEGER tmp;
   67     int error;
   68 
   69     error = acpi_PkgInt(dev, res, idx, &tmp);
   70     if (error == 0)
   71         *dst = (uint32_t)tmp;
   72     return (error);
   73 }
   74 
   75 int
   76 acpi_PkgStr(device_t dev, ACPI_OBJECT *res, int idx, void *dst, size_t size)
   77 {
   78     ACPI_OBJECT         *obj;
   79     void                *ptr;
   80     size_t               length;
   81 
   82     obj = &res->Package.Elements[idx];
   83     if (obj == NULL) {
   84         ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
   85                     "PkgStr NULL object at %d\n", idx);
   86         return (-1);
   87     }
   88     bzero(dst, sizeof(dst));
   89 
   90     switch (obj->Type) {
   91     case ACPI_TYPE_STRING:
   92         ptr = obj->String.Pointer;
   93         length = obj->String.Length;
   94         break;
   95     case ACPI_TYPE_BUFFER:
   96         ptr = obj->Buffer.Pointer;
   97         length = obj->Buffer.Length;
   98         break;
   99     default:
  100         ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
  101                     "PkgStr: invalid object type %d at %d\n", obj->Type, idx);
  102         return (-1);
  103     }
  104 
  105     /* Make sure string will fit, including terminating NUL */
  106     if (++length > size) {
  107         ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
  108                     "PkgStr string too long (%zu bytes) at %d\n", length, idx);
  109         return (-1);
  110     }
  111 
  112     strlcpy(dst, ptr, length);
  113     return (0);
  114 }
  115 
  116 int
  117 acpi_PkgGas(device_t dev, ACPI_OBJECT *res, int idx, int *rid,
  118             struct resource **dst)
  119 {
  120     ACPI_GENERIC_ADDRESS gas;
  121     ACPI_OBJECT         *obj;
  122 
  123     obj = &res->Package.Elements[idx];
  124     if (obj == NULL || obj->Type != ACPI_TYPE_BUFFER ||
  125         obj->Buffer.Length < sizeof(ACPI_GENERIC_ADDRESS) + 3) {
  126 
  127         ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
  128                     "PkgGas error at %d\n", idx);
  129         return (-1);
  130     }
  131 
  132     memcpy(&gas, obj->Buffer.Pointer + 3, sizeof(gas));
  133     *dst = acpi_bus_alloc_gas(dev, rid, &gas);
  134     if (*dst == NULL) {
  135         ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
  136                     "PkgGas error at %d\n", idx);
  137         return (-1);
  138     }
  139 
  140     return (0);
  141 }

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FreeBSD/Linux Kernel Cross Reference sys/dev/acpica/acpi_package.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/acpica/acpi_package.c