mirror of
https://github.com/Fennix-Project/Kernel.git
synced 2025-05-25 22:14:37 +00:00
98 lines
2.7 KiB
C++
98 lines
2.7 KiB
C++
/*
|
|
This file is part of Fennix Kernel.
|
|
|
|
Fennix Kernel is free software: you can redistribute it and/or
|
|
modify it under the terms of the GNU General Public License as
|
|
published by the Free Software Foundation, either version 3 of
|
|
the License, or (at your option) any later version.
|
|
|
|
Fennix Kernel is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with Fennix Kernel. If not, see <https://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "acpi.hpp"
|
|
|
|
#include <memory.hpp>
|
|
#include <debug.h>
|
|
|
|
#include "../../kernel.h"
|
|
|
|
namespace ACPI
|
|
{
|
|
MADT::MADT(ACPI::MADTHeader *madt)
|
|
{
|
|
trace("Initializing MADT");
|
|
if (!madt)
|
|
{
|
|
error("MADT is NULL");
|
|
return;
|
|
}
|
|
|
|
CPUCores = 0;
|
|
LAPICAddress = (LAPIC *)(uintptr_t)madt->LocalControllerAddress;
|
|
for (uint8_t *ptr = (uint8_t *)(madt->Entries);
|
|
(uintptr_t)(ptr) < (uintptr_t)(madt) + madt->Header.Length;
|
|
ptr += *(ptr + 1))
|
|
{
|
|
switch (*(ptr))
|
|
{
|
|
case 0:
|
|
{
|
|
if (ptr[4] & 1)
|
|
{
|
|
lapic.push_back((LocalAPIC *)ptr);
|
|
KPrint("Local APIC %d (APIC %d) found.", lapic.back()->ACPIProcessorId, lapic.back()->APICId);
|
|
CPUCores++;
|
|
}
|
|
break;
|
|
}
|
|
case 1:
|
|
{
|
|
ioapic.push_back((MADTIOApic *)ptr);
|
|
KPrint("I/O APIC %d (Address %#lx) found.", ioapic.back()->APICID, ioapic.back()->Address);
|
|
Memory::Virtual(KernelPageTable).Map((void *)(uintptr_t)ioapic.back()->Address, (void *)(uintptr_t)ioapic.back()->Address, Memory::PTFlag::RW | Memory::PTFlag::PCD); // Make sure that the address is mapped.
|
|
break;
|
|
}
|
|
case 2:
|
|
{
|
|
iso.push_back((MADTIso *)ptr);
|
|
KPrint("ISO (IRQ:%#lx, BUS:%#lx, GSI:%#lx, %s/%s) found.",
|
|
iso.back()->IRQSource, iso.back()->BuSSource, iso.back()->GSI,
|
|
iso.back()->Flags & 0x00000004 ? "Active High" : "Active Low",
|
|
iso.back()->Flags & 0x00000100 ? "Edge Triggered" : "Level Triggered");
|
|
break;
|
|
}
|
|
case 4:
|
|
{
|
|
nmi.push_back((MADTNmi *)ptr);
|
|
KPrint("NMI %#lx (lint:%#lx) found.", nmi.back()->processor, nmi.back()->lint);
|
|
break;
|
|
}
|
|
case 5:
|
|
{
|
|
LAPICAddress = (LAPIC *)ptr;
|
|
KPrint("APIC found at %#lx", LAPICAddress);
|
|
break;
|
|
}
|
|
default:
|
|
{
|
|
KPrint("Unknown MADT entry %#lx", *(ptr));
|
|
break;
|
|
}
|
|
}
|
|
Memory::Virtual(KernelPageTable).Map((void *)LAPICAddress, (void *)LAPICAddress, Memory::PTFlag::RW | Memory::PTFlag::PCD); // I should map more than one page?
|
|
}
|
|
CPUCores--; // We start at 0 (BSP) and end at 11 (APs), so we have 12 cores.
|
|
KPrint("Total CPU cores: %d", CPUCores + 1);
|
|
}
|
|
|
|
MADT::~MADT()
|
|
{
|
|
}
|
|
}
|