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/*
* Copyright (c) 2018-2021, James Mintram <me@jamesrm.com>
* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Function.h>
#include <Kernel/Arch/x86/ASM_wrapper.h>
namespace Kernel {
namespace Memory {
class PageDirectory;
}
struct ProcessorMessageEntry;
struct DeferredCallEntry;
enum class ProcessorSpecificDataID {
MemoryManager,
__Count,
};
struct ProcessorMessage {
using CallbackFunction = Function<void()>;
enum Type {
FlushTlb,
Callback,
};
Type type;
Atomic<u32> refs;
union {
ProcessorMessage* next; // only valid while in the pool
alignas(CallbackFunction) u8 callback_storage[sizeof(CallbackFunction)];
struct {
Memory::PageDirectory const* page_directory;
u8* ptr;
size_t page_count;
} flush_tlb;
};
volatile bool async;
ProcessorMessageEntry* per_proc_entries;
CallbackFunction& callback_value()
{
return *bit_cast<CallbackFunction*>(&callback_storage);
}
void invoke_callback()
{
VERIFY(type == Type::Callback);
callback_value()();
}
};
struct ProcessorMessageEntry {
ProcessorMessageEntry* next;
ProcessorMessage* msg;
};
struct DeferredCallEntry {
using HandlerFunction = Function<void()>;
DeferredCallEntry* next;
alignas(HandlerFunction) u8 handler_storage[sizeof(HandlerFunction)];
bool was_allocated;
HandlerFunction& handler_value()
{
return *bit_cast<HandlerFunction*>(&handler_storage);
}
void invoke_handler()
{
handler_value()();
}
};
}
#if ARCH(X86_64) || ARCH(I386)
# include <Kernel/Arch/x86/Processor.h>
#elif ARCH(AARCH64)
# include <Kernel/Arch/aarch64/Processor.h>
#else
# error "Unknown architecture"
#endif
namespace Kernel {
template<typename T>
class ProcessorSpecific {
public:
static void initialize()
{
Processor::current().set_specific(T::processor_specific_data_id(), new T);
}
static T& get()
{
return *Processor::current().get_specific<T>();
}
};
}
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