51 lines
1.2 KiB
C++
51 lines
1.2 KiB
C++
#include "acpi.h"
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RSDPDescriptor* ACPI::rsd_ptr;
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RSCPDescriptor20* ACPI::rsd2_ptr;
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RSDT* ACPI::rsd_table;
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void ACPI::initialize(){
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// Find the Root System Description Pointer
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ACPI::rsd_ptr = FindRSD();
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printf("RSD address: 0x%x\n", ACPI::rsd_ptr);
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//printRSD(rsd_ptr);
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if( rsd_ptr->Revision == 0 ){
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// Using veriosn 1.0 of the ACPI specifiction
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int sum = rsd_ptr->Checksum;
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for (int i =0; i < sizeof(RSDPDescriptor) ; i++) {
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sum += ((char*)rsd_ptr)[i];
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}
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printf(" 0x%x sum\n", sum);
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if(sum & 0xfff0)
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printf("valid rsd!\n");
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else
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printf("invalid rsd\n");
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// Get the Root System Description Table NOTE: might need memory mapping
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//RSDT* rootSystemDescriptionTable = (RSDT*) (rsd_ptr->RsdtAddress + 0xC0000000);
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} else{
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// parse it as of version2.0
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ACPI::rsd2_ptr = (RSCPDescriptor20*)rsd_ptr;
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}
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/*
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auto tableHeader = &rootSystemDescriptionTable->h;
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// do checksum
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sum = 0;
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for(int i = 0; i < tableHeader->Length; i ++) {
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sum += ((char*) tableHeader)[i];
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}
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if( sum != 0)
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printf("Table invalid!");*/
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} |