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/*
* Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
* 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 COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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 <Kernel/ACPI/DynamicParser.h>
#include <Kernel/CommandLine.h>
namespace Kernel {
namespace ACPI {
enum class FeatureLevel {
Enabled,
Limited,
Disabled,
};
static FeatureLevel determine_feature_level()
{
auto value = kernel_command_line().lookup("acpi").value_or("on");
if (value == "limited")
return FeatureLevel::Limited;
if (value == "off")
return FeatureLevel::Disabled;
return FeatureLevel::Enabled;
}
void initialize()
{
auto feature_level = determine_feature_level();
if (feature_level == FeatureLevel::Disabled)
return;
auto rsdp = StaticParsing::find_rsdp();
if (rsdp.is_null())
return;
if (feature_level == FeatureLevel::Enabled)
Parser::initialize<DynamicParser>(rsdp);
else
Parser::initialize<Parser>(rsdp);
}
bool is_enabled()
{
return Parser::the();
}
}
}
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