portisr.c

ertfs文件系统里面既有完整ucos程序

//
//    Module description:
//        This file contains interrupt sevice routines and associated
//        HISR mechanisms for RTFS.
//
//  

#include <pcdisk.h>

/* These routines are only needed if these sub-systems are included */
#if (USE_ATA)

/* These are pc specific PIC functions.. see below */
void ks_mask_isr_on(int irq);
void ks_mask_isr_off(int irq);
void ks_clear_isr(int irq);
int  ks_isr_to_vector(int irq);


/* Define macros to declare an interrupt service routine and to declare
   storage to hold the previous value of the interrupt vector that 
   we are replacing */
#if (defined(POLLOS))
//#include <dos.h>
#define KS_INTFN_DECLARE(x) void /*interrupt*/ KS_FAR x(void)
#define KS_INTFN_POINTER(x) void (/*interrupt*/ KS_FAR *x)(void)
#elif (defined(UCOS))
#define KS_INTFN_DECLARE(x)   void KS_FAR x(void)
#define KS_INTFN_POINTER(x)   void KS_FAR *x
/* See the provided copy of Ix86L_A.ASM for these routines */
extern void asm_ide_isr_0(void);
extern void asm_ide_isr_1(void);
extern void asm_floppy_isr(void);
#elif (defined(PLUS))
#define KS_INTFN_DECLARE(x)   void KS_FAR x(void)
#define KS_INTFN_POINTER(x)   void KS_FAR *x
#if (USE_ATA)
/* ide HISR data */
NU_HISR     ide_HISR_Control[2];
char        ide_HISR_Stack[2][1024];
void ide_hisr_0(void);
void ide_hisr_1(void);
#endif

#else
#error - Define KS_INTFN_DECLARE and KS_INTFN_POINTER(x) for your environment
#endif

/* Saved off old values from the interrupt vector table */
KS_INTFN_POINTER(oldint[15]);


#if (USE_ATA)
/* IDE interrupt management package */
/* Signals touched in this file */

/* irq number for ide controllers saved at hook time */
int ide_isr_no[2];
int pcmcia_isr_no;


/* This is the isr function in ide_drv.c */
void ide_isr(int controller_no);

/* This is the interrupt service routine for IDE controller number zero
   it calls the ide_isr() routine in ide_drv.c which calls ks_invoke_ide_interrupt(0)
   in this file 
*/

KS_INTFN_DECLARE(ide_isr_0)
{
    ide_isr(0);
    ks_clear_isr(ide_isr_no[0]);
}

/* This is the interrupt service routine for IDE controller number one
   it calls the ide_isr() routine in ide_drv.c which calls ks_invoke_ide_interrupt(0)
   in this file 
*/
KS_INTFN_DECLARE(ide_isr_1)
{
    ide_isr(1);
    ks_clear_isr(ide_isr_no[1]);
}

/* This is called by the isr to execute the hisr for the interrupt */ 
void ks_invoke_ide_interrupt(int controller_number)
{
#if (defined(PLUS))
    NU_Activate_HISR(&ide_HISR_Control[controller_number]);
#elif (defined(POLLOS)||defined(RTPX)||defined(CMX)||defined(UCOS))
    ks_set_ide_signal(controller_number);
#else
#error - Signal ide from ISR for your kernel. Following code may be correct
    ks_set_ide_signal(controller_number);
#endif
}

/* This is the routine that hooks the interrupt for the IDE controller */
void hook_ide_interrupt(int irq, int controller_number)
{
int vector_no;

    ide_isr_no[controller_number] = irq;

    /* Convert irq number to vector number for register lisr */
    vector_no = ks_isr_to_vector(irq);

    if (controller_number==0)
    {
#if (defined(PLUS))
        NU_Create_HISR(&ide_HISR_Control[0], "HISR", ide_hisr_0,
                        2, &ide_HISR_Stack[0][0], 1024);
        NU_Register_LISR(vector_no, ide_isr_0, &(oldint[irq]));
#elif (defined(POLLOS))
//        oldint[irq] = _dos_getvect (vector_no);
//        _dos_setvect (vector_no, ide_isr_0);
#elif (defined(UCOS))
//        oldint[irq] = _dos_getvect (vector_no);
//        _dos_setvect (vector_no, (void (interrupt *)(void))asm_ide_isr_0);
#else
#error - Implement hook ide vector for your system
#endif
    }
    else
    {
#if (defined(PLUS))
        NU_Create_HISR(&ide_HISR_Control[1], "HISR", ide_hisr_1,
                    2, &ide_HISR_Stack[1][0], 1024);
        NU_Register_LISR(vector_no, ide_isr_1, &(oldint[irq]));
#elif (defined(POLLOS))
//        oldint[irq] = _dos_getvect (vector_no);
//        _dos_setvect (vector_no, ide_isr_1);
#elif (defined(UCOS))
//        oldint[irq] = _dos_getvect (vector_no);
//        _dos_setvect (vector_no, (void (interrupt *)(void))asm_ide_isr_1);
#else
#error - Implement hook ide vector for your system
#endif
    }
    /* mask on the interrupt 8259. pc specific */
    ks_mask_isr_on(irq);
    /* clear any stray interrupts */
    ks_clear_isr(irq);
}

#endif /* (USE_ATA) */

/* Common routines */
void ks_restore_vectors(void)
{
int i;

    for (i = 0; i < 15; i++)
    {
        if (oldint[i])
        {
#if (defined(PLUS))
            NU_Register_LISR(ks_isr_to_vector(i),oldint[i], &oldint[i]);
#elif (defined(POLLOS))
//            _dos_setvect (ks_isr_to_vector(i),oldint[i]);
#elif (defined(UCOS))
//            _dos_setvect (ks_isr_to_vector(i),(void (interrupt *)(void))oldint[i]);
#else
#error Implement retore vector for your kernel
#endif
        }
    }

}

#if (IS_NOT_PC_ARCH)

int ks_isr_to_vector(int irq)
{
    return(irq);
}

// turn on the interrupt thru 8259 interrupt controller
void ks_mask_isr_on(int irq)
{
}

// turn off the interrupt thru 8259 interrupt controller
void ks_mask_isr_off(int irq)
{
}

/* clear any stray interupts or acknowledge to interrupt controller */
void ks_clear_isr(int irq)
{
}
#else
#error must define ks_isr_to_vector, ks_mask_isr_on(int irq)
#error void ks_mask_isr_off(int irq)
#error void ks_clear_isr(int irq)
#endif


#if (defined(PLUS))
#if (USE_ATA)
    /* These are hisr routines for the ide driver. they are scheduled when the
        ide interrupt service routine calls ks_invoke_ide_interrupt(controller_number) */
void ide_hisr_0(void)
{
    ks_set_ide_signal(0);
}

void ide_hisr_1(void)
{
    ks_set_ide_signal(1);
}
#endif
#endif /* Nucleus */

#endif //  (USE_ATA)