From 2d59766eb330b9d15a9bcbcd7e1695809fc099c5 Mon Sep 17 00:00:00 2001 From: EmulatedSeasons <89668582+EmulatedSeasons@users.noreply.github.com> Date: Fri, 3 May 2024 03:39:47 -0400 Subject: renamed i386 to x86 --- kernel/arch/x86/idt.cpp | 133 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 133 insertions(+) create mode 100644 kernel/arch/x86/idt.cpp (limited to 'kernel/arch/x86/idt.cpp') diff --git a/kernel/arch/x86/idt.cpp b/kernel/arch/x86/idt.cpp new file mode 100644 index 0000000..a8f3ff4 --- /dev/null +++ b/kernel/arch/x86/idt.cpp @@ -0,0 +1,133 @@ +#include +#include + +/* Function prototypes for the ISR functions. IDT[0] to IDT[31] are reserved for hardware exceptions */ +extern "C" void isr0(); +extern "C" void isr1(); +extern "C" void isr2(); +extern "C" void isr3(); +extern "C" void isr4(); +extern "C" void isr5(); +extern "C" void isr6(); +extern "C" void isr7(); +extern "C" void isr8(); +extern "C" void isr9(); +extern "C" void isr10(); +extern "C" void isr11(); +extern "C" void isr12(); +extern "C" void isr13(); +extern "C" void isr14(); +extern "C" void isr15(); +extern "C" void isr16(); +extern "C" void isr17(); +extern "C" void isr18(); +extern "C" void isr19(); +extern "C" void isr20(); +extern "C" void isr21(); +extern "C" void isr22(); +extern "C" void isr23(); +extern "C" void isr24(); +extern "C" void isr25(); +extern "C" void isr26(); +extern "C" void isr27(); +extern "C" void isr28(); +extern "C" void isr29(); +extern "C" void isr30(); +extern "C" void isr31(); +extern "C" void isr32(); +extern "C" void isr33(); +extern "C" void isr34(); +extern "C" void isr35(); +extern "C" void isr36(); +extern "C" void isr37(); +extern "C" void isr38(); +extern "C" void isr39(); +extern "C" void isr40(); +extern "C" void isr41(); +extern "C" void isr42(); +extern "C" void isr43(); +extern "C" void isr44(); +extern "C" void isr45(); +extern "C" void isr46(); +extern "C" void isr47(); + +struct idt_entry +{ + uint16_t offset_low; + uint16_t selector; + uint8_t always0; + uint8_t type_attributes; + uint16_t offset_high; +}__attribute__((packed)); + +struct str_idtr { + uint16_t limit; + uint32_t base; +}__attribute__((packed)); + +idt_entry idt[256]; +str_idtr idtr; + +void idt_new_entry(int num, uint32_t offset, uint16_t sel, uint8_t type_attribs) { + idt[num].offset_low = (offset & 0xFFFF); + idt[num].selector = sel; + idt[num].always0 = 0; + idt[num].type_attributes = type_attribs; + idt[num].offset_high = (offset >> 16) & 0xFFFF; +} + +extern "C" void idt_setup() { + idtr.limit = (sizeof(struct idt_entry) * 256) - 1; + idtr.base = (uint32_t)idt; + + // todo: is there really no other way? + idt_new_entry(0, (unsigned)isr0, 0x08, 0x8E); + idt_new_entry(1, (unsigned)isr1, 0x08, 0x8E); + idt_new_entry(2, (unsigned)isr2, 0x08, 0x8E); + idt_new_entry(3, (unsigned)isr3, 0x08, 0x8E); + idt_new_entry(4, (unsigned)isr4, 0x08, 0x8E); + idt_new_entry(5, (unsigned)isr5, 0x08, 0x8E); + idt_new_entry(6, (unsigned)isr6, 0x08, 0x8E); + idt_new_entry(7, (unsigned)isr7, 0x08, 0x8E); + idt_new_entry(8, (unsigned)isr8, 0x08, 0x8E); + idt_new_entry(9, (unsigned)isr9, 0x08, 0x8E); + idt_new_entry(10, (unsigned)isr10, 0x08, 0x8E); + idt_new_entry(11, (unsigned)isr11, 0x08, 0x8E); + idt_new_entry(12, (unsigned)isr12, 0x08, 0x8E); + idt_new_entry(13, (unsigned)isr13, 0x08, 0x8E); + idt_new_entry(14, (unsigned)isr14, 0x08, 0x8E); + idt_new_entry(15, (unsigned)isr15, 0x08, 0x8E); + idt_new_entry(16, (unsigned)isr16, 0x08, 0x8E); + idt_new_entry(17, (unsigned)isr17, 0x08, 0x8E); + idt_new_entry(18, (unsigned)isr18, 0x08, 0x8E); + idt_new_entry(19, (unsigned)isr19, 0x08, 0x8E); + idt_new_entry(20, (unsigned)isr20, 0x08, 0x8E); + idt_new_entry(21, (unsigned)isr21, 0x08, 0x8E); + idt_new_entry(22, (unsigned)isr22, 0x08, 0x8E); + idt_new_entry(23, (unsigned)isr23, 0x08, 0x8E); + idt_new_entry(24, (unsigned)isr24, 0x08, 0x8E); + idt_new_entry(25, (unsigned)isr25, 0x08, 0x8E); + idt_new_entry(26, (unsigned)isr26, 0x08, 0x8E); + idt_new_entry(27, (unsigned)isr27, 0x08, 0x8E); + idt_new_entry(28, (unsigned)isr28, 0x08, 0x8E); + idt_new_entry(29, (unsigned)isr29, 0x08, 0x8E); + idt_new_entry(30, (unsigned)isr30, 0x08, 0x8E); + idt_new_entry(31, (unsigned)isr31, 0x08, 0x8E); + //PIC entries + idt_new_entry(32, (unsigned)isr32, 0x08, 0x8E); + idt_new_entry(33, (unsigned)isr33, 0x08, 0x8E); + idt_new_entry(34, (unsigned)isr34, 0x08, 0x8E); + idt_new_entry(35, (unsigned)isr35, 0x08, 0x8E); + idt_new_entry(36, (unsigned)isr36, 0x08, 0x8E); + idt_new_entry(37, (unsigned)isr37, 0x08, 0x8E); + idt_new_entry(38, (unsigned)isr38, 0x08, 0x8E); + idt_new_entry(39, (unsigned)isr39, 0x08, 0x8E); + idt_new_entry(40, (unsigned)isr40, 0x08, 0x8E); + idt_new_entry(41, (unsigned)isr41, 0x08, 0x8E); + idt_new_entry(42, (unsigned)isr42, 0x08, 0x8E); + idt_new_entry(43, (unsigned)isr43, 0x08, 0x8E); + idt_new_entry(44, (unsigned)isr44, 0x08, 0x8E); + idt_new_entry(45, (unsigned)isr45, 0x08, 0x8E); + idt_new_entry(46, (unsigned)isr46, 0x08, 0x8E); + idt_new_entry(47, (unsigned)isr47, 0x08, 0x8E); +} \ No newline at end of file -- cgit v1.2.3-70-g09d2