qk_port.h

量子编程源代码 量子编程源代码

/*****************************************************************************
* Product:  QK/C, port to 80x86, QK, Turbo C++ 1.01, Large model
* Last Updated for Version: 3.4.01
* Date of the Last Update:  Sep 08, 2007
*
*                    Q u a n t u m     L e a P s
*                    ---------------------------
*                    innovating embedded systems
*
* Copyright (C) 2002-2007 Quantum Leaps, LLC. All rights reserved.
*
* This software may be distributed and modified under the terms of the GNU
* General Public License version 2 (GPL) as published by the Free Software
* Foundation and appearing in the file GPL.TXT included in the packaging of
* this file. Please note that GPL Section 2[b] requires that all works based
* on this software must also be made publicly available under the terms of
* the GPL ("Copyleft").
*
* Alternatively, this software may be distributed and modified under the
* terms of Quantum Leaps commercial licenses, which expressly supersede
* the GPL and are specifically designed for licensees interested in
* retaining the proprietary status of their code.
*
* Contact information:
* Quantum Leaps Web site:  http://www.quantum-leaps.com
* e-mail:                  [e-mail]
*****************************************************************************/
#ifndef qk_port_h
#define qk_port_h
                                          /* QK critical section entry/exit */
/* QK_INT_KEY_TYPE not defined */
#define QK_INT_LOCK(key_)   disable()
#define QK_INT_UNLOCK(key_) enable()

                                  /* QK extended context (FPU) save/restore */
#define QK_EXT_TYPE         FPU_context
#define QK_EXT_SAVE(ctx_)   FPU_save(ctx_)
#define QK_EXT_RESTORE(ctx_) FPU_restore(ctx_)

typedef struct FPU_contextTag FPU_context;
struct FPU_contextTag {
    uint32_t fpu[108/4];             /* the x87 FPU context takes 108-bytes */
};
void FPU_save(FPU_context *ctx);                     /* defined in assembly */
void FPU_restore(FPU_context *ctx);                  /* defined in assembly */
enum QKTaskFlags {
    QK_FPU_THREAD = 0x01
};

                                             /* QK interrupt entry and exit */
#define QK_ISR_ENTRY(pin_, isrPrio_) do { \
    (pin_) = QK_currPrio_; \
    QK_currPrio_ = (isrPrio_); \
    QF_QS_ISR_ENTRY(QK_currPrio_); \
    enable(); \
} while (0)

#define QK_ISR_EXIT(pin_) do { \
    QF_INT_LOCK(ignore); \
    outportb(0x20, 0x20); \
    QF_QS_ISR_EXIT(QK_currPrio_); \
    QK_currPrio_ = (pin_); \
    if ((pin_) <= QF_MAX_ACTIVE) { \
        if ((QF_active_[pin_]->osObject & QK_FPU_THREAD) != 0) { \
            QK_scheduleExt_(); \
        } \
        else { \
            QK_schedule_(); \
        } \
    } \
} while (0)


#include <dos.h>                  /* for declarations of disable()/enable() */
#undef outportb /*don't use the macro because it has a bug in Turbo C++ 1.01*/

#include "qk.h"                 /* QK platform-independent public interface */
#include "qf.h"                 /* QF platform-independent public interface */

#endif                                                         /* qk_port_h */

/*****************************************************************************
* NOTE:
* The QK port on x86 is not a pure play, but rather, QK is based in this
* case on DOS.
*/