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Kernel: Detect APs and boot them into protected mode

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This isn't fully working, the APs pretend like they're
fully initialized and are just halted permanently for now.
This commit is contained in:
Tom 2020-06-04 09:10:16 -06:00 • committed by Andreas Kling
commit 0bc92c259d
Notes: sideshowbarker 2024-07-19 05:50:00 +09:00
9 changed files with 463 additions and 108 deletions
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21
Kernel/init.cpp
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@ -121,6 +121,7 @@ extern "C" [[noreturn]] void init()
for (ctor_func_t* ctor = &start_ctors; ctor < &end_ctors; ctor++)
(*ctor)();
APIC::initialize();
InterruptManagement::initialize();
ACPI::initialize();
@ -161,6 +162,26 @@ extern "C" [[noreturn]] void init()
ASSERT_NOT_REACHED();
}
//
// This is where C++ execution begins for APs, after boot.S transfers control here.
//
// The purpose of init_ap() is to initialize APs for multi-tasking.
//
extern "C" [[noreturn]] void init_ap(u32 cpu)
{
APIC::the().enable(cpu);
#if 0
Scheduler::idle_loop();
#else
// FIXME: remove once schedule can handle APs
cli();
for (;;)
asm volatile("hlt");
#endif
ASSERT_NOT_REACHED();
}
void init_stage2()
{
SyncTask::spawn();