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Scheduler refactor Pt. 1

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* Simplifies scheduling logic, specifically regarding thread status. It should be much clearer which statuses are valid
for a thread at any given point in the system.
* Removes dead code from thread.cpp.
* Moves the implementation of resetting a ThreadContext to the corresponding core's implementation.

Other changes:
* Fixed comments in arm interfaces.
* Updated comments in thread.cpp
* Removed confusing, useless, functions like MakeReady() and ChangeStatus() from thread.cpp.
* Removed stack_size from Thread. In the CTR kernel, the thread's stack would be allocated before thread creation.
This commit is contained in:
Kevin Hartman
2015-01-25 22:56:17 -08:00
parent 848795f383
commit 5fcbfc06eb
7 changed files with 289 additions and 286 deletions
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57
src/core/arm/dyncom/arm_dyncom.h
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@ -13,79 +13,24 @@
class ARM_DynCom final : virtual public ARM_Interface {
public:
ARM_DynCom();
~ARM_DynCom();
/**
* Set the Program Counter to an address
* @param pc Address to set PC to
*/
void SetPC(u32 pc) override;
/*
* Get the current Program Counter
* @return Returns current PC
*/
u32 GetPC() const override;
/**
* Get an ARM register
* @param index Register index (0-15)
* @return Returns the value in the register
*/
u32 GetReg(int index) const override;
/**
* Set an ARM register
* @param index Register index (0-15)
* @param value Value to set register to
*/
void SetReg(int index, u32 value) override;
/**
* Get the current CPSR register
* @return Returns the value of the CPSR register
*/
u32 GetCPSR() const override;
/**
* Set the current CPSR register
* @param cpsr Value to set CPSR to
*/
void SetCPSR(u32 cpsr) override;
/**
* Returns the number of clock ticks since the last reset
* @return Returns number of clock ticks
*/
u64 GetTicks() const override;
/**
* Advance the CPU core by the specified number of ticks (e.g. to simulate CPU execution time)
* @param ticks Number of ticks to advance the CPU core
*/
void AddTicks(u64 ticks) override;
/**
* Saves the current CPU context
* @param ctx Thread context to save
*/
void ResetContext(Core::ThreadContext& context, u32 stack_top, u32 entry_point, u32 arg);
void SaveContext(Core::ThreadContext& ctx) override;
/**
* Loads a CPU context
* @param ctx Thread context to load
*/
void LoadContext(const Core::ThreadContext& ctx) override;
/// Prepare core for thread reschedule (if needed to correctly handle state)
void PrepareReschedule() override;
/**
* Executes the given number of instructions
* @param num_instructions Number of instructions to executes
*/
void ExecuteInstructions(int num_instructions) override;
private: