Mail Archives: djgpp/1999/11/04/23:11:41
Try to disable the interupt while writing.
Peter Danielsson wrote:
> Perheps your interupt function try to change the memory while writing to disk. This may cause problem.
>
> /Peter
>
> Frederic Cazenave wrote:
>
> > Hi,
> >
> > In fact I have cornered more my problem :
> > The problen is beetween the interrupt and the write.
> > The two parts work fine separately but most of the
> > time when I try to write while some interrupts are
> > treated my system crashes.
> > I give you the code of my interrupt. If someone could
> > show me the problem ...
> >
> > iqbuff is created by a malloc on 90% off the free
> > pages of my system.
> >
> > Thanks
> >
> > FRed
> >
> > --
> > _________________________________________________________
> > | |
> > | Frederic CAZENAVE |
> > | _/\_ /^= McGill Radar |
> > | \_/ \// Box 198, MacDonald College |
> > | | /-\ | Ste Anne de Bellevue |
> > | || || Quebec, Canada H9X 3V9 |
> > | Tel (514) 398 7733 fax (514) 398 7755 |
> > | mailto:Frederic DOT Cazenave AT hmg DOT inpg DOT fr |
> > | http://www.mpl.orstom.fr/hydrologie/catch/ |
> > |__________________________________________________________|
> >
> > ------------------------------------------------------------------------
> > #include <stdio.h>
> > #include <ctype.h>
> > #include <string.h>
> >
> > #include <go32.h>
> > #include <dpmi.h>
> >
> > #include "..\include\globals.h"
> >
> > #define LOCK_VAR(x) _go32_dpmi_lock_code((void *)&x,(long)sizeof(x));
> > #define NHITS 7
> >
> > extern int pos_prod;
> >
> > typedef struct tabiq {
> > float IQ[2][1024*NHITS];
> > } TABIQ;
> >
> > extern TABIQ * buffiq;
> > extern int numhits;
> >
> > int Intnum;
> > static int * gates;
> > static int * flag;
> > static PIRAQ *diraq;
> > static int * xstart;
> > static int * xstop;
> >
> > static int *Ack;
> >
> > unsigned short Reg_base;
> >
> > void piraq_int_off(void);
> > void piraq_int_on(CONFIG * config, PIRAQ * piraq);
> > void piraq_isr(void);
> > static void IntDirac (void);
> > static void End_IntDirac(void);
> >
> > int Irqmask;
> >
> > /* declare an arrays for the info on all the interrupts */
> > _go32_dpmi_seginfo Piraq_isr;
> >
> > void piraq_int_off(void)
> > {
> > int intnum;
> >
> > if(Intnum < 8)
> > outp(0x21,inp(0x21)|Irqmask); /* clear master PIC */
> > else
> > outp(0xA1,inp(0xA1)|Irqmask); /* clear slave PIC */
> >
> > _go32_dpmi_free_iret_wrapper(&Piraq_isr);
> > }
> >
> > static int Firstime=1;
> > void piraq_int_on(CONFIG * config, PIRAQ * piraq)
> > {
> > if(Firstime) /* register the cleanup routine */
> > {
> > Firstime = 0;
> > atexit(piraq_int_off);
> > }
> > Ack = (int *)config->intack;
> > diraq = piraq;
> > flag = (int *) piraq->flag;
> > gates = &config->gates;
> > xstart = &config->first_g;
> > xstop = &config->last_g;
> > _go32_dpmi_lock_code(IntDirac,(unsigned long)(IntDirac - End_IntDirac));
> > _go32_dpmi_lock_data(&Intnum,sizeof(int));
> > _go32_dpmi_lock_data(&pos_prod,sizeof(int));
> > _go32_dpmi_lock_data(diraq,sizeof(PIRAQ));
> > _go32_dpmi_lock_data(gates,sizeof(int));
> > _go32_dpmi_lock_data(xstart,sizeof(int));
> > _go32_dpmi_lock_data(xstop,sizeof(int));
> > _go32_dpmi_lock_data(Ack,sizeof(int));
> > Intnum = pci(0x3C) & 0xFF;
> >
> > /* calculate irq mask bit for PIC */
> > Piraq_isr.pm_offset = (int)(IntDirac);
> > Piraq_isr.pm_selector = _go32_my_cs();
> > _go32_dpmi_allocate_iret_wrapper(&Piraq_isr);
> > if(Intnum < 8)
> > {
> > Irqmask = 1 << Intnum;
> > outp(0x21,inp(0x21)&~Irqmask); /* enable PC IRQ on master */
> > _go32_dpmi_set_protected_mode_interrupt_vector(Intnum+8,&Piraq_isr); /* hardware irq0 is int 8 */
> > }
> > else
> > {
> > Irqmask = 1 << (Intnum - 8);
> > outp(0xA1,inp(0xA1)&~Irqmask); /* enable PC IRQ on slave */
> > _go32_dpmi_set_protected_mode_interrupt_vector(Intnum+0x68,&Piraq_isr); /* hardware irq0 is int 8 */
> > }
> > }
> >
> > static void IntDirac (void)
> > {
> > float *dualram[2],*iqbuff[2],*ram;
> > int i,j;
> > float tmp;
> >
> > // disable();
> > dualram[0] = diraq->bufptr[ *(diraq->flag) & 1];
> > dualram[1] = dualram[0] + 0x4000;
> > iqbuff[0] = (float *)(TABIQ *)(buffiq+pos_prod)->IQ[0];
> > iqbuff[1] = (float *)(TABIQ *)(buffiq+pos_prod)->IQ[1];
> >
> > for (j=0;j<NHITS;j++){
> > *iqbuff[0]++ = *(float *)(dualram[0]+j**gates); // Gate0 I
> > *iqbuff[0]++ = *(float *)(dualram[0]+j**gates+1); // Gate0 Q
> > ram = (float *)(dualram[0]+j**gates+*xstart);
> > for (i=0;i< *xstop-*xstart;i++)
> > *iqbuff[0]++ = *(float *)ram++;
> > }
> > for (j=0;j<NHITS;j++){
> > *iqbuff[1]++ = *(float *)(dualram[1]+j**gates); // Gate0 I
> > *iqbuff[1]++ = *(float *)(dualram[1]+j**gates+1); // Gate0 Q
> > ram = (float *)(dualram[1]+j**gates+*xstart);
> > for (i=0;i< *xstop-*xstart;i++)
> > *iqbuff[1]++ = *(float *)ram++;
> > }
> > pos_prod++;
> >
> > if (pos_prod == numhits )
> > pos_prod = 0 ;
> >
> >
> > *Ack = 0;
> > if(Intnum > 7)
> > outp(0xA0,0x20); /* reset PIC1 */ /* do this first */
> > outp(0x20,0x20); /* reset PIC0 */
> > // enable();
> > }
> > static void End_IntDirac (void) {}
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