mirror of
https://github.com/TomHarte/CLK.git
synced 2024-12-27 01:31:42 +00:00
78 lines
2.1 KiB
C++
78 lines
2.1 KiB
C++
//
|
|
// Perform.hpp
|
|
// Clock Signal
|
|
//
|
|
// Created by Thomas Harte on 05/10/2023.
|
|
// Copyright © 2023 Thomas Harte. All rights reserved.
|
|
//
|
|
|
|
#ifndef Perform_h
|
|
#define Perform_h
|
|
|
|
#include "Instruction.hpp"
|
|
#include "Model.hpp"
|
|
#include "Status.hpp"
|
|
|
|
namespace InstructionSet::x86 {
|
|
|
|
/// Explains the type of access that `perform` intends to perform; is provided as a template parameter to whatever
|
|
/// the caller supplies as `MemoryT` and `RegistersT` when obtaining a reference to whatever the processor
|
|
/// intends to reference.
|
|
///
|
|
/// `perform` guarantees to validate all accesses before modifying any state, giving the caller opportunity to generate
|
|
/// any exceptions that might be applicable.
|
|
enum class AccessType {
|
|
/// The requested value will be read from.
|
|
Read,
|
|
/// The requested value will be written to.
|
|
Write,
|
|
/// The requested value will be read from and then written to.
|
|
ReadModifyWrite,
|
|
/// The requested value has already been authorised for whatever form of access is now intended, so there's no
|
|
/// need further to inspect. This is done e.g. by operations that will push multiple values to the stack to verify that
|
|
/// all necessary stack space is available ahead of pushing anything, though each individual push will then result in
|
|
/// a further `Preauthorised` access.
|
|
PreauthorisedRead,
|
|
PreauthorisedWrite,
|
|
};
|
|
|
|
template <
|
|
Model model_,
|
|
typename FlowControllerT,
|
|
typename RegistersT,
|
|
typename MemoryT,
|
|
typename IOT
|
|
> struct ExecutionContext {
|
|
FlowControllerT flow_controller;
|
|
Status status;
|
|
RegistersT registers;
|
|
MemoryT memory;
|
|
IOT io;
|
|
static constexpr Model model = model_;
|
|
};
|
|
|
|
/// Performs @c instruction querying @c registers and/or @c memory as required, using @c io for port input/output,
|
|
/// and providing any flow control effects to @c flow_controller.
|
|
///
|
|
/// Any change in processor status will be applied to @c status.
|
|
template <
|
|
typename InstructionT,
|
|
typename ContextT
|
|
> void perform(
|
|
const InstructionT &instruction,
|
|
ContextT &context
|
|
);
|
|
|
|
template <
|
|
typename ContextT
|
|
> void interrupt(
|
|
int index,
|
|
ContextT &context
|
|
);
|
|
|
|
}
|
|
|
|
#include "Implementation/PerformImplementation.hpp"
|
|
|
|
#endif /* Perform_h */
|