ppc32/state.h

/*
 * Copyright (c) 2008-2014, Pedigree Developers
 *
 * Please see the CONTRIB file in the root of the source tree for a full
 * list of contributors.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef KERNEL_PROCESSOR_MIPS32_STATE_H
#define KERNEL_PROCESSOR_MIPS32_STATE_H

#include "pedigree/kernel/Log.h"
#include "pedigree/kernel/compiler.h"
#include "pedigree/kernel/processor/types.h"

typedef class PPC32InterruptState PPC32SyscallState;
typedef class PPC32InterruptState PPC32ProcessorState;

class PPC32InterruptState
{
  public:
    //
    // General Interface (both InterruptState and SyscallState)
    //
    inline uintptr_t getStackPointer() const;
    inline void setStackPointer(uintptr_t stackPointer);
    inline uintptr_t getInstructionPointer() const;
    inline void setInstructionPointer(uintptr_t instructionPointer);
    inline uintptr_t getBasePointer() const;
    inline void setBasePointer(uintptr_t basePointer);
    size_t getRegisterCount() const;
    processor_register_t getRegister(size_t index) const;
    const char *getRegisterName(size_t index) const;
    inline size_t getRegisterSize(size_t index) const;

    //
    // InterruptState Interface
    //
    inline bool kernelMode() const;
    inline size_t getInterruptNumber() const;

    //
    // SyscallState Interface
    //
    inline size_t getSyscallService() const;
    inline size_t getSyscallNumber() const;
    inline uintptr_t getSyscallParameter(size_t n) const;
    inline void setSyscallReturnValue(uintptr_t val);

    static PPC32InterruptState *
    construct(PPC32ProcessorState &state, bool userMode);

  private:
  public:
    PPC32InterruptState();

    PPC32InterruptState(const PPC32InterruptState &);
    PPC32InterruptState &operator=(const PPC32InterruptState &);
    ~PPC32InterruptState()
    {
    }

    uint32_t m_IntNumber;
    uint32_t m_Xer;
    uint32_t m_Ctr;
    uint32_t m_Lr;
    uint32_t m_Cr;
    uint32_t m_Srr0;
    uint32_t m_Srr1;
    uint32_t m_Dsisr;
    uint32_t m_Dar;
    uint32_t m_R0;
    uint32_t m_R1;
    uint32_t m_R2;
    uint32_t m_R3;
    uint32_t m_R4;
    uint32_t m_R5;
    uint32_t m_R6;
    uint32_t m_R7;
    uint32_t m_R8;
    uint32_t m_R9;
    uint32_t m_R10;
    uint32_t m_R11;
    uint32_t m_R12;
    uint32_t m_R13;
    uint32_t m_R14;
    uint32_t m_R15;
    uint32_t m_R16;
    uint32_t m_R17;
    uint32_t m_R18;
    uint32_t m_R19;
    uint32_t m_R20;
    uint32_t m_R21;
    uint32_t m_R22;
    uint32_t m_R23;
    uint32_t m_R24;
    uint32_t m_R25;
    uint32_t m_R26;
    uint32_t m_R27;
    uint32_t m_R28;
    uint32_t m_R29;
    uint32_t m_R30;
    uint32_t m_R31;
} PACKED;

class PPC32SchedulerState
{
} PACKED;

//
// Part of the Implementation
//

uintptr_t PPC32InterruptState::getStackPointer() const
{
    return m_R1;
}
void PPC32InterruptState::setStackPointer(uintptr_t stackPointer)
{
    m_R1 = stackPointer;
}
uintptr_t PPC32InterruptState::getInstructionPointer() const
{
    return m_Srr0;
}
void PPC32InterruptState::setInstructionPointer(uintptr_t instructionPointer)
{
    m_Srr0 = instructionPointer;
}
uintptr_t PPC32InterruptState::getBasePointer() const
{
    return 0xdeadbaba;
}
void PPC32InterruptState::setBasePointer(uintptr_t basePointer)
{
}
size_t PPC32InterruptState::getRegisterSize(size_t index) const
{
    return 4;
}

bool PPC32InterruptState::kernelMode() const
{
    return m_Srr1 & (1 << 15);
}
size_t PPC32InterruptState::getInterruptNumber() const
{
    return m_IntNumber;
}

size_t PPC32InterruptState::getSyscallService() const
{
    return ((m_R3 >> 16) & 0xFFFF);
}
size_t PPC32InterruptState::getSyscallNumber() const
{
    return (m_R3 & 0xFFFF);
}
uintptr_t PPC32InterruptState::getSyscallParameter(size_t n) const
{
    switch (n)
    {
        case 0:
            return m_R6;
        case 1:
            return m_R7;
        case 2:
            return m_R8;
        case 3:
            return m_R9;
        case 4:
            return m_R10;
        default:
            WARNING("Bad syscall parameter requested: " << Dec << n);
            return 0;
    }
}
void PPC32InterruptState::setSyscallReturnValue(uintptr_t val)
{
    m_R3 = val;
}

#endif