RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-25 22:47:47 +00:00
Code Issues Activity Actions

Kernel: Add Processor::wait_for_interrupt and use it in Scheduler

Browse source 
This removes the x86 specific hlt instruction from the scheduler, and
allows us to run the scheduler code for aarch64 by implementing
Processor::wait_for_interrupt for aarch64.
This commit is contained in:
Timon Kruiper 2022-12-22 13:24:19 +01:00 • committed by Andrew Kaster
parent f232133f65
commit f6f43fd65e
3 changed files with 13 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

9
Kernel/Arch/aarch64/Processor.h
View file

@ -56,12 +56,17 @@ public:
void idle_begin() const
{
TODO_AARCH64();
// FIXME: Implement this when SMP for aarch64 is supported.
}
void idle_end() const
{
TODO_AARCH64();
// FIXME: Implement this when SMP for aarch64 is supported.
}
void wait_for_interrupt() const
{
asm("wfi");
}
ALWAYS_INLINE static void pause()

5
Kernel/Arch/x86_64/Processor.h
View file

@ -150,6 +150,11 @@ public:
s_idle_cpu_mask.fetch_and(~(1u << m_cpu), AK::MemoryOrder::memory_order_relaxed);
}
void wait_for_interrupt() const
{
asm("hlt");
}
static Processor& by_id(u32);
static u32 count()

3
Kernel/Scheduler.cpp
View file

@ -479,8 +479,7 @@ void Scheduler::idle_loop(void*)
for (;;) {
proc.idle_begin();
asm("hlt");
proc.wait_for_interrupt();
proc.idle_end();
VERIFY_INTERRUPTS_ENABLED();
yield();