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Merge remote-tracking branch 'Kernel/master'
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EnderIce2
207
Kernel/core/acpi.cpp
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207
Kernel/core/acpi.cpp
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/*
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This file is part of Fennix Kernel.
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Fennix Kernel is free software: you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation, either version 3 of
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the License, or (at your option) any later version.
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Fennix Kernel is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Fennix Kernel. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include <acpi.hpp>
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#include <debug.h>
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#include <io.h>
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#include "../kernel.h"
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namespace ACPI
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{
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__no_sanitize("alignment") void *ACPI::FindTable(ACPI::ACPIHeader *ACPIHeader, char *Signature)
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{
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for (uint64_t t = 0; t < ((ACPIHeader->Length - sizeof(ACPI::ACPIHeader)) / (XSDTSupported ? 8 : 4)); t++)
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{
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wint-to-pointer-cast"
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// TODO: Should I be concerned about unaligned memory access?
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ACPI::ACPIHeader *SDTHdr = nullptr;
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if (XSDTSupported)
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SDTHdr = (ACPI::ACPIHeader *)(*(uint64_t *)((uint64_t)ACPIHeader + sizeof(ACPI::ACPIHeader) + (t * 8)));
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else
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SDTHdr = (ACPI::ACPIHeader *)(*(uint32_t *)((uint64_t)ACPIHeader + sizeof(ACPI::ACPIHeader) + (t * 4)));
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#pragma GCC diagnostic pop
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size_t signLength = strlen(Signature);
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for (size_t i = 0; i < signLength; i++)
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{
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if (SDTHdr->Signature[i] != Signature[i])
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break;
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if (i == 3)
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{
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#ifdef DEBUG
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KPrint("ACPI: %.4s [%.6s:%.8s] found at address %#lx",
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Signature,
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SDTHdr->OEMID,
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SDTHdr->OEMTableID,
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(uintptr_t)SDTHdr);
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#endif
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trace("%s found at address %#lx", Signature, (uintptr_t)SDTHdr);
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Tables[Signature] = SDTHdr;
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return SDTHdr;
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}
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}
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}
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// warn("%s not found!", Signature);
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return nullptr;
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}
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void ACPI::SearchTables(ACPIHeader *Header)
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{
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if (!Header)
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return;
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HPET = (HPETHeader *)FindTable(Header, (char *)"HPET");
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FADT = (FADTHeader *)FindTable(Header, (char *)"FACP");
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MCFG = (MCFGHeader *)FindTable(Header, (char *)"MCFG");
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BGRT = (BGRTHeader *)FindTable(Header, (char *)"BGRT");
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SRAT = (SRATHeader *)FindTable(Header, (char *)"SRAT");
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TPM2 = (TPM2Header *)FindTable(Header, (char *)"TPM2");
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TCPA = (TCPAHeader *)FindTable(Header, (char *)"TCPA");
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WAET = (WAETHeader *)FindTable(Header, (char *)"WAET");
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MADT = (MADTHeader *)FindTable(Header, (char *)"APIC");
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HEST = (HESTHeader *)FindTable(Header, (char *)"HEST");
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SSDT = (SSDTHeader *)FindTable(Header, (char *)"SSDT");
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DBGP = (DBGPHeader *)FindTable(Header, (char *)"DBGP");
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DBG2 = (DBG2Header *)FindTable(Header, (char *)"DBG2");
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FindTable(Header, (char *)"BERT");
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FindTable(Header, (char *)"CPEP");
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FindTable(Header, (char *)"DSDT");
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FindTable(Header, (char *)"ECDT");
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FindTable(Header, (char *)"EINJ");
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FindTable(Header, (char *)"ERST");
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FindTable(Header, (char *)"FACS");
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FindTable(Header, (char *)"MSCT");
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FindTable(Header, (char *)"MPST");
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FindTable(Header, (char *)"OEMx");
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FindTable(Header, (char *)"PMTT");
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FindTable(Header, (char *)"PSDT");
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FindTable(Header, (char *)"RASF");
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FindTable(Header, (char *)"RSDT");
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FindTable(Header, (char *)"SBST");
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FindTable(Header, (char *)"SLIT");
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FindTable(Header, (char *)"XSDT");
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FindTable(Header, (char *)"DRTM");
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FindTable(Header, (char *)"FPDT");
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FindTable(Header, (char *)"GTDT");
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FindTable(Header, (char *)"PCCT");
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FindTable(Header, (char *)"S3PT");
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FindTable(Header, (char *)"MATR");
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FindTable(Header, (char *)"MSDM");
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FindTable(Header, (char *)"WPBT");
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FindTable(Header, (char *)"OSDT");
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FindTable(Header, (char *)"RSDP");
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FindTable(Header, (char *)"NFIT");
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FindTable(Header, (char *)"ASF!");
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FindTable(Header, (char *)"BOOT");
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FindTable(Header, (char *)"CSRT");
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FindTable(Header, (char *)"BDAT");
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FindTable(Header, (char *)"CDAT");
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FindTable(Header, (char *)"DMAR");
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FindTable(Header, (char *)"IBFT");
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FindTable(Header, (char *)"IORT");
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FindTable(Header, (char *)"IVRS");
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FindTable(Header, (char *)"LPIT");
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FindTable(Header, (char *)"MCHI");
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FindTable(Header, (char *)"MTMR");
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FindTable(Header, (char *)"SLIC");
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FindTable(Header, (char *)"SPCR");
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FindTable(Header, (char *)"SPMI");
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FindTable(Header, (char *)"UEFI");
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FindTable(Header, (char *)"VRTC");
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FindTable(Header, (char *)"WDAT");
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FindTable(Header, (char *)"WDDT");
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FindTable(Header, (char *)"WDRT");
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FindTable(Header, (char *)"ATKG");
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FindTable(Header, (char *)"GSCI");
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FindTable(Header, (char *)"IEIT");
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FindTable(Header, (char *)"HMAT");
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FindTable(Header, (char *)"CEDT");
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FindTable(Header, (char *)"AEST");
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FindTable(Header, (char *)"AGDI");
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FindTable(Header, (char *)"APMT");
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FindTable(Header, (char *)"ETDT");
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FindTable(Header, (char *)"MPAM");
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FindTable(Header, (char *)"PDTT");
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FindTable(Header, (char *)"PPTT");
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FindTable(Header, (char *)"RAS2");
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FindTable(Header, (char *)"SDEI");
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FindTable(Header, (char *)"STAO");
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FindTable(Header, (char *)"XENV");
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FindTable(Header, (char *)"PHAT");
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FindTable(Header, (char *)"SVKL");
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FindTable(Header, (char *)"UUID");
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FindTable(Header, (char *)"CCEL");
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FindTable(Header, (char *)"WSMT");
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FindTable(Header, (char *)"PRMT");
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FindTable(Header, (char *)"NBFT");
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FindTable(Header, (char *)"RSD PTR");
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FindTable(Header, (char *)"TDX");
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FindTable(Header, (char *)"CXL");
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FindTable(Header, (char *)"DSD");
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FindTable(Header, (char *)"BSA");
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}
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ACPI::ACPI()
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{
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trace("Initializing ACPI");
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if (!bInfo.RSDP)
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{
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error("RSDP not found!");
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return;
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}
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if (bInfo.RSDP->Revision >= 2 && bInfo.RSDP->XSDTAddress)
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{
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debug("XSDT supported");
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XSDTSupported = true;
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XSDT = (ACPIHeader *)(bInfo.RSDP->XSDTAddress);
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}
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else
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{
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debug("RSDT supported");
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XSDT = (ACPIHeader *)(uintptr_t)bInfo.RSDP->RSDTAddress;
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}
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if (!Memory::Virtual().Check(XSDT))
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{
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warn("%s is not mapped!",
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XSDTSupported ? "XSDT" : "RSDT");
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debug("XSDT: %p", XSDT);
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Memory::Virtual().Map(XSDT, XSDT, Memory::RW);
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}
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this->SearchTables(XSDT);
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if (FADT)
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{
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outb(s_cst(uint16_t, FADT->SMI_CommandPort), FADT->AcpiEnable);
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/* TODO: Sleep for ~5 seconds before polling PM1a CB? */
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while (!(inw(s_cst(uint16_t, FADT->PM1aControlBlock)) & 1))
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CPU::Pause();
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}
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}
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ACPI::~ACPI()
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{
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}
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}
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