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/*-
* Copyright (c) 2003 Nate Lawson
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/sbuf.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/rman.h>
#include <contrib/dev/acpica/include/acpi.h>
#include <dev/acpica/acpivar.h>
/*
* Package manipulation convenience functions
*/
int
acpi_PkgInt(ACPI_OBJECT *res, int idx, ACPI_INTEGER *dst)
{
ACPI_OBJECT *obj;
obj = &res->Package.Elements[idx];
if (obj == NULL || obj->Type != ACPI_TYPE_INTEGER)
return (EINVAL);
*dst = obj->Integer.Value;
return (0);
}
int
acpi_PkgInt32(ACPI_OBJECT *res, int idx, uint32_t *dst)
{
ACPI_INTEGER tmp;
int error;
error = acpi_PkgInt(res, idx, &tmp);
if (error == 0)
*dst = (uint32_t)tmp;
return (error);
}
int
acpi_PkgStr(ACPI_OBJECT *res, int idx, void *dst, size_t size)
{
ACPI_OBJECT *obj;
void *ptr;
size_t length;
obj = &res->Package.Elements[idx];
if (obj == NULL)
return (EINVAL);
bzero(dst, sizeof(dst));
switch (obj->Type) {
case ACPI_TYPE_STRING:
ptr = obj->String.Pointer;
length = obj->String.Length;
break;
case ACPI_TYPE_BUFFER:
ptr = obj->Buffer.Pointer;
length = obj->Buffer.Length;
break;
default:
return (EINVAL);
}
/* Make sure string will fit, including terminating NUL */
if (++length > size)
return (E2BIG);
strlcpy(dst, ptr, length);
return (0);
}
int
acpi_PkgGas(device_t dev, ACPI_OBJECT *res, int idx, int *type, int *rid,
struct resource **dst, u_int flags)
{
ACPI_GENERIC_ADDRESS gas;
ACPI_OBJECT *obj;
obj = &res->Package.Elements[idx];
if (obj == NULL || obj->Type != ACPI_TYPE_BUFFER ||
obj->Buffer.Length < sizeof(ACPI_GENERIC_ADDRESS) + 3)
return (EINVAL);
memcpy(&gas, obj->Buffer.Pointer + 3, sizeof(gas));
return (acpi_bus_alloc_gas(dev, type, rid, &gas, dst, flags));
}
ACPI_HANDLE
acpi_GetReference(ACPI_HANDLE scope, ACPI_OBJECT *obj)
{
ACPI_HANDLE h;
if (obj == NULL)
return (NULL);
switch (obj->Type) {
case ACPI_TYPE_LOCAL_REFERENCE:
case ACPI_TYPE_ANY:
h = obj->Reference.Handle;
break;
case ACPI_TYPE_STRING:
/*
* The String object usually contains a fully-qualified path, so
* scope can be NULL.
*
* XXX This may not always be the case.
*/
if (ACPI_FAILURE(AcpiGetHandle(scope, obj->String.Pointer, &h)))
h = NULL;
break;
default:
h = NULL;
break;
}
return (h);
}
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