forked from BSB-WS23/mpstubs
87 lines
2.0 KiB
C++
87 lines
2.0 KiB
C++
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#include "startup.h"
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#include "types.h"
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#include "compiler/libc.h"
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#include "debug/output.h"
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#include "debug/kernelpanic.h"
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#include "interrupt/handler.h"
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#include "machine/acpi.h"
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#include "machine/apic.h"
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#include "machine/core.h"
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#include "machine/idt.h"
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#include "machine/pic.h"
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/*! \brief The first processor is the Bootstrap Processor (BSP)
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*/
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static bool is_bootstrap_processor = true;
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extern "C" [[noreturn]] void kernel_init() {
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if (is_bootstrap_processor) {
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is_bootstrap_processor = false;
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/* Setup and load Interrupt Descriptor Table (IDT)
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*
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* On the first call to \ref kernel_init(), we have to assign the
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* addresses of the entry functions for each interrupt
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* (called 'interrupt_entry_VECTOR', defined in `interrupt/handler.asm`)
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* to the IDT. These entry functions save the context and call the C++
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* \ref interrupt_handler(). As the \ref IDT is used by all CPUs,
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* it is sufficient to do this initialization on only the BSP (first core).
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*/
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for (int i = 0; i < Core::Interrupt::VECTORS ; i++) {
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IDT::handle(i, interrupt_entry[i]);
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}
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IDT::load();
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// Initialize PICs
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PIC::initialize();
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// Call global constructors
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CSU::initializer();
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// Initialize ACPI
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if (!ACPI::init()) {
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DBG_VERBOSE << "No ACPI!";
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Core::die();
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}
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// Initialize APIC (using ACPI)
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if (!APIC::init()) {
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DBG_VERBOSE << "APIC Initialization failed";
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Core::die();
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}
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// Initialize the Bootstrap Processor
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Core::init();
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// Go to main function
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main();
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// Exit CPU
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DBG_VERBOSE << "CPU core " << Core::getID() << " (BSP) shutdown." << endl;
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Core::exit();
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} else {
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// Load Interrupt Descriptor Table (IDT)
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IDT::load();
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// Initialize this application processor
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Core::init();
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// And call the AP main
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main_ap();
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// Exit CPU
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DBG_VERBOSE << "CPU core " << Core::getID() << " (AP) shutdown." << endl;
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Core::exit();
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}
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// Only on last core
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if (Core::countOnline() == 1) {
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// Call global destructors
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CSU::finalizer();
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}
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// wait forever
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while (true) {
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Core::die();
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}
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}
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