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Kernel: Implement software context switching and Processor structure

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Moving certain globals into a new Processor structure for
each CPU allows us to eventually run an instance of the
scheduler on each CPU.
This commit is contained in:
Tom 2020-06-27 13:42:28 -06:00 • committed by Andreas Kling
parent 10407061d2
commit fb41d89384
22 changed files with 1002 additions and 513 deletions
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25
Kernel/init.cpp
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@ -103,18 +103,19 @@ extern "C" [[noreturn]] void init()
{
setup_serial_debug();
cpu_setup();
cpu_setup(0);
kmalloc_init();
slab_alloc_init();
{
static Processor s_bsp_processor_info; // global but let's keep it "private"
s_bsp_processor_info.initialize(0);
}
CommandLine::initialize(reinterpret_cast<const char*>(low_physical_to_virtual(multiboot_info_ptr->cmdline)));
MemoryManager::initialize();
gdt_init();
idt_init();
// Invoke all static global constructors in the kernel.
// Note that we want to do this as early as possible.
for (ctor_func_t* ctor = &start_ctors; ctor < &end_ctors; ctor++)
@ -148,16 +149,12 @@ extern "C" [[noreturn]] void init()
VirtualConsole::switch_to(0);
Process::initialize();
Thread::initialize();
Scheduler::initialize(0);
Thread* init_stage2_thread = nullptr;
Process::create_kernel_process(init_stage2_thread, "init_stage2", init_stage2);
Scheduler::pick_next();
sti();
Scheduler::idle_loop();
Scheduler::start();
ASSERT_NOT_REACHED();
}
@ -166,8 +163,12 @@ extern "C" [[noreturn]] void init()
//
// The purpose of init_ap() is to initialize APs for multi-tasking.
//
extern "C" [[noreturn]] void init_ap(u32 cpu)
extern "C" [[noreturn]] void init_ap(u32 cpu, Processor* processor_info)
{
klog() << "CPU #" << cpu << " processor_info at " << VirtualAddress(FlatPtr(processor_info));
cpu_setup(cpu);
processor_info->initialize(cpu);
APIC::the().enable(cpu);
#if 0