/*
   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 <smp.hpp>

#include <memory.hpp>
#include <ints.hpp>
#include <assert.h>
#include <cpu.hpp>
#include <atomic>

#include "../../../kernel.h"

enum SMPTrampolineAddress
{
    PAGE_TABLE = 0x500,
    START_ADDR = 0x520,
    STACK = 0x570,
    GDT = 0x580,
    IDT = 0x590,
    CORE = 0x600,
    TRAMPOLINE_START = 0x2000
};

std::atomic_bool CPUEnabled = false;

#pragma GCC diagnostic ignored "-Wmissing-field-initializers"
static __aligned(0x1000) CPUData CPUs[MAX_CPU] = {0};

SafeFunction CPUData *GetCPU(long id) { return &CPUs[id]; }

SafeFunction CPUData *GetCurrentCPU()
{
    uint64_t ret = 0;
    if (!(&CPUs[ret])->IsActive)
    {
        // error("CPU %d is not active!", ret); FIXME
        return &CPUs[0];
    }
    assert((&CPUs[ret])->Checksum == CPU_DATA_CHECKSUM);
    return &CPUs[ret];
}

namespace SMP
{
    int CPUCores = 0;

    void Initialize(void *madt)
    {
        fixme("SMP::Initialize() is not implemented!");
    }
}