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52 lines
1.1 KiB
C++
52 lines
1.1 KiB
C++
#include "textoutput.hpp"
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#include <cstdint>
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extern TextOutput& term;
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extern std::uint32_t *acpiRsdp;
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extern std::uint32_t *acpiRsdpV2;
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struct XSDP {
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char Signature[8];
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std::uint8_t Checksum;
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char OEMID[6];
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std::uint8_t Revision;
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std::uint32_t RsdtAddress; // deprecated since version 2.0
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// v2 only!
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std::uint32_t Length;
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std::uint64_t XsdtAddress;
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std::uint8_t ExtendedChecksum;
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std::uint8_t reserved[3];
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} __attribute__ ((packed));
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struct SDTHeader {
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char Signature[4];
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std::uint32_t Length;
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std::uint8_t Revision;
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std::uint8_t Checksum;
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char OEMID[6];
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char OEMTableID[8];
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std::uint32_t OEMRevision;
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std::uint32_t CreatorID;
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std::uint32_t CreatorRevision;
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};
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static XSDP *rsdp = nullptr;
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void acpi_initialize()
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{
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if (acpiRsdp) {
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term.write("ACPI v1 detected.\n");
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rsdp = reinterpret_cast<XSDP *>(acpiRsdp);
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} else if (acpiRsdpV2) {
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term.write("ACPI v2 detected, treating as v1.\n");
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rsdp = reinterpret_cast<XSDP *>(acpiRsdpV2);
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}
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//if (rsdp) {
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// auto sdt = reinterpret_cast<SDTHeader *>(rsdp->RsdtAddress);
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//}
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}
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