From 19d9a04e36e7fb96eebe89e24311408460c29a70 Mon Sep 17 00:00:00 2001
From: Clyne Sullivan <clyne@bitgloo.com>
Date: Mon, 30 Sep 2024 11:08:46 -0400
Subject: reorganize files

---
 idt.cpp | 126 ----------------------------------------------------------------
 1 file changed, 126 deletions(-)
 delete mode 100644 idt.cpp

(limited to 'idt.cpp')

diff --git a/idt.cpp b/idt.cpp
deleted file mode 100644
index 5380c9e..0000000
--- a/idt.cpp
+++ /dev/null
@@ -1,126 +0,0 @@
-#include "idt.hpp"
-#include "portio.hpp"
-#include "textoutput.hpp"
-
-#include <array>
-#include <cstdint>
-#include <utility>
-
-extern TextOutput& term;
-
-static constexpr unsigned InterruptCount = 49;
-
-static constexpr std::uint8_t TaskGate   = 0x5;
-static constexpr std::uint8_t IntrGate16 = 0x6;
-static constexpr std::uint8_t TrapGate16 = 0x7;
-static constexpr std::uint8_t IntrGate32 = 0xE;
-static constexpr std::uint8_t TrapGate32 = 0xF;
-
-struct idt_entry_bits {
-    std::uint32_t offset_low             : 16;
-    std::uint32_t segment_selector       : 16;
-    std::uint32_t rsvd                   :  8 = 0;
-    std::uint32_t gate_type              :  4;
-    std::uint32_t rsvd2                  :  1 = 0;
-    std::uint32_t dpl                    :  2;
-    std::uint32_t present                :  1;
-    std::uint32_t offset_high            : 16;
-} __attribute__((packed));
-
-static std::array<Callback, InterruptCount> callbacks;
-
-extern "C"
-void interruptGeneralHandler(Registers regs)
-{
-    const auto& inum = regs.inum;
-
-    if (inum >= 32) {
-        if (inum >= 40)
-            outb(0xA0, 0x20);
-
-        outb(0x20, 0x20);
-    }
-
-    if (inum < callbacks.size()) {
-        if (auto cb = callbacks[inum]; cb) {
-            asm volatile("cli");
-            cb(regs);
-            asm volatile("sti");
-        }
-    }
-}
-
-template<std::size_t N>
-struct StubEntry
-{
-    static constexpr bool HasError = N == 8 || (N >= 10 && N <= 14) || N == 17 || N == 30;
-
-    __attribute__((naked))
-    static void stub() {
-        if constexpr (!HasError)
-            asm volatile("push $0x0");
-
-        asm volatile(R"(
-            pusha
-            mov %%ds, %%eax
-            push %%eax
-            mov $0x10, %%ax
-            mov %%ax, %%ds
-            mov %%ax, %%es
-            mov %%ax, %%fs
-            mov %%ax, %%gs
-            push %0
-            cld
-            call interruptGeneralHandler
-            pop %%eax
-            pop %%eax
-            mov %%ax, %%ds
-            mov %%ax, %%es
-            mov %%ax, %%fs
-            mov %%ax, %%gs
-            popa
-            add $0x4, %%esp
-            iret
-        )" :: "i"(N));
-    }
-
-    static constexpr std::uint32_t segment(std::uint16_t gdt_idx, bool useLdt, std::uint16_t rpl) {
-        return gdt_idx | (useLdt ? 0x4 : 0x0) | (rpl & 0x3);
-    }
-
-    idt_entry_bits entry = {
-        .offset_low = (uint32_t)stub & 0xFFFF,
-        .segment_selector = segment(0x8, false, 0),
-        .gate_type = IntrGate32,
-        .dpl = 0,
-        .present = 1,
-        .offset_high = (uint32_t)stub >> 16
-    };
-
-    operator idt_entry_bits() const noexcept {
-        return entry;
-    }
-};
-
-static auto idt =
-    []<std::size_t... ints>(std::index_sequence<ints...>) {
-        return std::array<idt_entry_bits, 256> { StubEntry<ints>()... };
-    }(std::make_index_sequence<InterruptCount>{});
-
-void idt_initialize()
-{
-    idt[0x28].dpl = 3;
-
-    auto idtr = reinterpret_cast<std::uint64_t>(idt.data());
-    idtr <<= 16;
-    idtr |= idt.size() * sizeof(idt[0]);
-
-    asm volatile("lidt %0" :: "m"(idtr));
-}
-
-void idt_register_callback(std::size_t num, Callback cb)
-{
-    if (num < callbacks.size())
-        callbacks[num] = cb;
-}
-
-- 
cgit v1.2.3