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/*
* ========================================================
*
* HCore
* Copyright Mahrouss Logic, all rights reserved.
*
* ========================================================
*/
#include <HALKit/AMD64/ACPI/ACPIManager.hpp>
#include <HALKit/AMD64/Processor.hpp>
#include <NewKit/String.hpp>
namespace HCore {
ACPIManager::ACPIManager(voidPtr rsdPtr) : m_Rsdp(rsdPtr), m_Entries(0) {
RSDP *_rsdPtr = reinterpret_cast<RSDP *>(this->m_Rsdp);
MUST_PASS(_rsdPtr);
MUST_PASS(_rsdPtr->Revision >= 2);
}
void ACPIManager::Shutdown() {}
void ACPIManager::Reset() {}
ErrorOr<voidPtr> ACPIManager::Find(const char *signature) {
MUST_PASS(m_Rsdp);
if (!signature) return ErrorOr<voidPtr>{-2};
if (*signature == 0) return ErrorOr<voidPtr>{-3};
RSDP *rsdPtr = reinterpret_cast<RSDP *>(this->m_Rsdp);
auto xsdt = rsdPtr->XsdtAddress;
SizeT num = (rsdPtr->Length + sizeof(SDT)) / 8;
for (Size index = 0; index < num; ++index) {
SDT *sdt = reinterpret_cast<SDT *>(xsdt + sizeof(SDT) + index * 8);
if (!Checksum(sdt->Signature, 4)) ke_stop(RUNTIME_CHECK_ACPI);
if (StringBuilder::Equals(const_cast<const char *>(sdt->Signature),
signature))
return ErrorOr<voidPtr>(reinterpret_cast<voidPtr>(sdt));
}
return ErrorOr<voidPtr>{-1};
}
bool ACPIManager::Checksum(const char *checksum, SSizeT len) {
if (len == 0) return -1;
char chr = 0;
for (int index = 0; index < len; ++index) {
chr += checksum[index];
}
return chr == 0;
}
void rt_shutdown_acpi_qemu_20(void) { HAL::out16(0xb004, 0x2000); }
void rt_shutdown_acpi_qemu_30_plus(void) { HAL::out16(0x604, 0x2000); }
void rt_shutdown_acpi_virtualbox(void) { HAL::out16(0x4004, 0x3400); }
/// you'll have to parse the MADT otherwise!
} // namespace HCore
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