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Kernel/riscv64: Implement initialize_interrupts()

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Sönke Holz 2024-01-20 18:18:31 +01:00 • committed by Andrew Kaster
parent 7b7578bc1b
commit 9bbf513c27
2 changed files with 73 additions and 6 deletions
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75
Kernel/Arch/riscv64/Interrupts.cpp
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@ -11,9 +11,14 @@
#include <Kernel/Arch/Interrupts.h>
#include <Kernel/Arch/TrapFrame.h>
#include <Kernel/Interrupts/GenericInterruptHandler.h>
#include <Kernel/Interrupts/SharedIRQHandler.h>
#include <Kernel/Interrupts/UnhandledInterruptHandler.h>
namespace Kernel {
// FIXME: Share this array with x86_64/aarch64 somehow and consider if this really needs to use raw pointers and not OwnPtrs
static Array<GenericInterruptHandler*, 64> s_interrupt_handlers;
void dump_registers(RegisterState const&)
{
}
@ -32,18 +37,80 @@ ErrorOr<u8> reserve_interrupt_handlers(u8)
TODO_RISCV64();
}
void register_generic_interrupt_handler(u8, GenericInterruptHandler&)
static void revert_to_unused_handler(u8 interrupt_number)
{
TODO_RISCV64();
auto* handler = new UnhandledInterruptHandler(interrupt_number);
handler->register_interrupt_handler();
}
void unregister_generic_interrupt_handler(u8, GenericInterruptHandler&)
// FIXME: Share the code below with Arch/{x86_64,aarch64}/Interrupts.cpp
void register_generic_interrupt_handler(u8 interrupt_number, GenericInterruptHandler& handler)
{
auto*& handler_slot = s_interrupt_handlers[interrupt_number];
if (handler_slot == nullptr) {
handler_slot = &handler;
return;
}
if (handler_slot->type() == HandlerType::UnhandledInterruptHandler) {
auto* unhandled_handler = static_cast<UnhandledInterruptHandler*>(handler_slot);
unhandled_handler->unregister_interrupt_handler();
delete unhandled_handler;
handler_slot = &handler;
return;
}
if (handler_slot->is_shared_handler()) {
VERIFY(handler_slot->type() == HandlerType::SharedIRQHandler);
static_cast<SharedIRQHandler*>(handler_slot)->register_handler(handler);
return;
}
if (!handler_slot->is_shared_handler()) {
if (handler_slot->type() == HandlerType::SpuriousInterruptHandler) {
// FIXME: Add support for spurious interrupts on riscv64
TODO_RISCV64();
}
VERIFY(handler_slot->type() == HandlerType::IRQHandler);
auto& previous_handler = *handler_slot;
handler_slot = nullptr;
SharedIRQHandler::initialize(interrupt_number);
VERIFY(handler_slot);
static_cast<SharedIRQHandler*>(handler_slot)->register_handler(previous_handler);
static_cast<SharedIRQHandler*>(handler_slot)->register_handler(handler);
return;
}
VERIFY_NOT_REACHED();
}
// FIXME: Share the code below with Arch/{x86_64,aarch64}/Interrupts.cpp
void unregister_generic_interrupt_handler(u8 interrupt_number, GenericInterruptHandler& handler)
{
auto*& handler_slot = s_interrupt_handlers[interrupt_number];
VERIFY(handler_slot != nullptr);
if (handler_slot->type() == HandlerType::UnhandledInterruptHandler)
return;
if (handler_slot->is_shared_handler()) {
VERIFY(handler_slot->type() == HandlerType::SharedIRQHandler);
auto* shared_handler = static_cast<SharedIRQHandler*>(handler_slot);
shared_handler->unregister_handler(handler);
if (shared_handler->sharing_devices_count() == 0) {
handler_slot = nullptr;
revert_to_unused_handler(interrupt_number);
}
return;
}
if (!handler_slot->is_shared_handler()) {
VERIFY(handler_slot->type() == HandlerType::IRQHandler);
handler_slot = nullptr;
revert_to_unused_handler(interrupt_number);
return;
}
}
void initialize_interrupts()
{
TODO_RISCV64();
for (size_t i = 0; i < s_interrupt_handlers.size(); ++i) {
auto* handler = new UnhandledInterruptHandler(i);
handler->register_interrupt_handler();
}
}
}