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Kernel/riscv64: Implement Processor::initialize_context_switching

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This code is based on the aarch64 implementation.
This commit is contained in:
Sönke Holz 2024-02-04 16:30:28 +01:00 • committed by Andrew Kaster
parent 1429c83942
commit 7fff6eef09
1 changed files with 22 additions and 2 deletions
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24
Kernel/Arch/riscv64/Processor.cpp
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@ -172,9 +172,29 @@ u32 ProcessorBase<T>::smp_wake_n_idle_processors(u32)
} }
template<typename T> template<typename T>
void ProcessorBase<T>::initialize_context_switching(Thread&) void ProcessorBase<T>::initialize_context_switching(Thread& initial_thread)
{ {
TODO_RISCV64(); VERIFY(initial_thread.process().is_kernel_process());
m_scheduler_initialized = true;
// FIXME: Figure out if we need to call {pre_,post_,}init_finished once riscv64 supports SMP
Processor::set_current_in_scheduler(true);
auto& regs = initial_thread.regs();
asm volatile(
"mv sp, %[new_sp] \n"
"addi sp, sp, -32 \n"
"sd %[from_to_thread], 0(sp) \n"
"sd %[from_to_thread], 8(sp) \n"
"jr %[new_ip] \n" ::[new_sp] "r"(regs.sp()),
[new_ip] "r"(regs.ip()),
[from_to_thread] "r"(&initial_thread)
: "t0");
VERIFY_NOT_REACHED();
} }
template<typename T> template<typename T>