os-k/kaleid/include/kernel/base.h

//----------------------------------------------------------------------------//
//                           GNU GPL OS/K                                     //
//                                                                            //
//  Desc:       Kaleid kernel base include file                               //
//                                                                            //
//                                                                            //
//  Copyright © 2018-2019 The OS/K Team                                       //
//                                                                            //
//  This file is part of OS/K.                                                //
//                                                                            //
//  OS/K is free software: you can redistribute it and/or modify              //
//  it under the terms of the GNU General Public License as published by      //
//  the Free Software Foundation, either version 3 of the License, or         //
//  any later version.                                                        //
//                                                                            //
//  OS/K is distributed in the hope that it will be useful,                   //
//  but WITHOUT ANY WARRANTY//without even the implied warranty of            //
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the             //
//  GNU General Public License for more details.                              //
//                                                                            //
//  You should have received a copy of the GNU General Public License         //
//  along with OS/K.  If not, see <https://www.gnu.org/licenses/>.            //
//----------------------------------------------------------------------------//

#ifndef _KALBASE_H
#include <kalbase.h>
#endif

#ifdef __cplusplus
#error "Kaleid's kernel won't compile in C++"
#endif

#ifndef _KALKERN_BASE_H
#define _KALKERN_BASE_H

//------------------------------------------//

typedef struct Lock_t           Lock_t;
typedef struct Thread_t         Thread_t;
typedef struct Process_t        Process_t;
typedef struct Terminal_t       Terminal_t;
typedef struct ListHead_t       ListHead_t;
typedef struct ListNode_t       ListNode_t;
typedef struct Processor_t      Processor_t;

typedef enum ProcState_t        ProcState_t;
typedef enum TermColor_t        TermColor_t;
typedef enum KernelState_t      KernelState_t;

//------------------------------------------//
//            Multiprocessor misc.          //
//------------------------------------------//

#ifndef NCPUS
#define NCPUS 1
#endif

// Current CPU number
// Will return a CPU-local variable later
#define _GetCurCPU() 0

// Get Process_t structure of current CPU
#define GetCurCPU() (cpuTable[_GetCurCPU()])
#define PANICSTR_SIZE 1024

//------------------------------------------//

//
// Holds all CPU-local variables
//
struct Processor_t
{
    // CPU number, index in CPU list
    int             index;

    // Panic string
    char            panicStr[PANICSTR_SIZE];

    // Number of ticks since boot time
    ulong          ticks;

    // Current process & thread
    Process_t      *process;
    Thread_t       *thread;

    // Need re-schedule?
    bool            needReSched;

    // Is preemption ON? ("PREEMPT_ON" in sched.h)
    ulong           preemptCount;

    // List heads for the four priority classes
    ListHead_t     *idlePrioProcs;
    ListHead_t     *reglPrioProcs;
    ListHead_t     *servPrioProcs;
    ListHead_t     *timeCritProcs;
};

//------------------------------------------//

extern int              cpuCount;
extern Processor_t      cpuTable[NCPUS];

//------------------------------------------//

#define DEC_PER_CPU(name, field, type) \
    static inline type Get##name() { return GetCurCPU().field; }    \
    static inline void _Set##name(type __val) { GetCurCPU().field = __val; }

//------------------------------------------//

// Needed by basically everyone
#ifndef _KALEXTRAS_LOCKS_H
#include <extras/locks.h>
#endif

//------------------------------------------//

#endif