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/* -------------------------------------------
Copyright Mahrouss Logic
------------------------------------------- */
#include <ArchKit/ArchKit.hpp>
namespace HCore::HAL {
STATIC RegisterGDT kRegGdt;
void GDTLoader::Load(RegisterGDT &gdt) {
MUST_PASS(gdt.Base != 0);
kRegGdt.Base = gdt.Base;
kRegGdt.Limit = gdt.Limit;
rt_load_gdt(kRegGdt);
}
STATIC HAL::Register64 kRegIdt;
STATIC ::HCore::Detail::AMD64::InterruptDescriptorAMD64
kInterruptVectorTable[kKernelIdtSize];
void IDTLoader::Load(Register64 &idt) {
volatile ::HCore::UIntPtr **baseIdt = (volatile ::HCore::UIntPtr **)idt.Base;
MUST_PASS(baseIdt);
for (UInt16 i = 0; i < kKernelIdtSize; i++) {
MUST_PASS(baseIdt[i]);
kInterruptVectorTable[i].Selector = kGdtCodeSelector;
kInterruptVectorTable[i].Ist = 0x0;
kInterruptVectorTable[i].TypeAttributes = kInterruptGate;
kInterruptVectorTable[i].OffsetLow = ((UIntPtr)baseIdt[i] & 0xFFFF);
kInterruptVectorTable[i].OffsetMid = (((UIntPtr)baseIdt[i] >> 16) & 0xFFFF);
kInterruptVectorTable[i].OffsetHigh =
(((UIntPtr)baseIdt[i] >> 32) & 0xFFFFFFFF);
kInterruptVectorTable[i].Zero = 0x0;
}
kRegIdt.Base = reinterpret_cast<UIntPtr>(kInterruptVectorTable);
kRegIdt.Limit = sizeof(::HCore::Detail::AMD64::InterruptDescriptorAMD64) *
(kKernelIdtSize - 1);
rt_load_idt(kRegIdt);
UInt8 a1, a2;
a1 = HAL::In8(0x21); // save masks
a2 = HAL::In8(0xA1);
// Remap PIC.
HAL::Out8(0x20, 0x11);
HAL::rt_wait_400ns();
HAL::Out8(0xA0, 0x11);
HAL::rt_wait_400ns();
HAL::Out8(0x21, 0x20);
HAL::rt_wait_400ns();
HAL::Out8(0xA1, 0x28);
HAL::rt_wait_400ns();
HAL::Out8(0x21, 0x04);
HAL::rt_wait_400ns();
HAL::Out8(0xA1, 0x02);
HAL::rt_wait_400ns();
HAL::Out8(0x21, 0x01);
HAL::rt_wait_400ns();
HAL::Out8(0xA1, 0x01);
HAL::rt_wait_400ns();
HAL::Out8(0x21, a1);
HAL::rt_wait_400ns();
HAL::Out8(0xA1, a2);
}
void GDTLoader::Load(Ref<RegisterGDT> &gdt) { GDTLoader::Load(gdt.Leak()); }
void IDTLoader::Load(Ref<Register64> &idt) { IDTLoader::Load(idt.Leak()); }
} // namespace HCore::HAL
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