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Kernel: Introduce the ACPI subsystem

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ACPI subsystem includes 3 types of parsers that are created during
runtime, each one capable of parsing ACPI tables at different level.

ACPIParser is the most basic parser which is essentialy a parser that
can't parse anything useful, due to a user request to disable ACPI
support in a kernel boot parameter.

ACPIStaticParser is a derived class from ACPIParser, which is able to
parse only static data (e.g. FADT, HPET, MCFG and other tables), thus
making it not able to parse AML (ACPI Machine Language) nor to support
handling of hardware events and power management. This type of parser
can be created with a kernel boot parameter.

ACPIDynamicParser is a derived class from ACPIStaticParser, which
includes all the capabilities of the latter, but *should* implement an
AML interpretation, (by building the ACPI AML namespace) and handling
power & hardware events. Currently the methods to support AML
interpretation are not implemented.
This type of parser is created automatically during runtime if the user
didn't specify a boot parameter related to ACPI initialization.

Also, adding strncmp function definition in StdLib.h, to be able to use
it in ACPIStaticParser class.
This commit is contained in:
Liav A 2019-12-31 13:01:09 +02:00 • committed by Andreas Kling
parent 331f37d1a8
commit 1e1a6a57ed
8 changed files with 894 additions and 0 deletions
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84
Kernel/ACPI/ACPIParser.cpp Normal file
View file

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#include <Kernel/ACPI/ACPIParser.h>
static ACPIParser* s_acpi_parser;
ACPIParser& ACPIParser::the()
{
ASSERT(s_acpi_parser != nullptr);
return *s_acpi_parser;
}
void ACPIParser::initialize_limited()
{
if (!ACPIParser::is_initialized()) {
s_acpi_parser = new ACPIParser(false);
}
}
bool ACPIParser::is_initialized()
{
return (s_acpi_parser != nullptr);
}
ACPIParser::ACPIParser(bool usable)
{
if (usable) {
kprintf("ACPI: Setting up a functional parser\n");
} else {
kprintf("ACPI: Limited Initialization. Vital functions are disabled by a request\n");
}
s_acpi_parser = this;
}
ACPI_RAW::SDTHeader* ACPIParser::find_table(const char*)
{
kprintf("ACPI: Requested to search for a table, Abort!\n");
return nullptr;
}
void ACPIParser::mmap(VirtualAddress, PhysicalAddress, u32)
{
ASSERT_NOT_REACHED();
}
void ACPIParser::mmap_region(Region&, PhysicalAddress)
{
ASSERT_NOT_REACHED();
}
void ACPIParser::do_acpi_reboot()
{
kprintf("ACPI: Cannot invoke reboot!\n");
ASSERT_NOT_REACHED();
}
void ACPIParser::do_acpi_shutdown()
{
kprintf("ACPI: Cannot invoke shutdown!\n");
ASSERT_NOT_REACHED();
}
void ACPIParser::enable_aml_interpretation()
{
kprintf("ACPI: No AML Interpretation Allowed\n");
ASSERT_NOT_REACHED();
}
void ACPIParser::enable_aml_interpretation(File&)
{
kprintf("ACPI: No AML Interpretation Allowed\n");
ASSERT_NOT_REACHED();
}
void ACPIParser::enable_aml_interpretation(u8*, u32)
{
kprintf("ACPI: No AML Interpretation Allowed\n");
ASSERT_NOT_REACHED();
}
void ACPIParser::disable_aml_interpretation()
{
kprintf("ACPI Limited: No AML Interpretation Allowed\n");
ASSERT_NOT_REACHED();
}
bool ACPIParser::is_operable()
{
return false;
}