Dear Mario,
Thank you for your speedy assistance.
The error also occurs when it is executed without the debugger. We are using
the Motorola 8260 ADS development board. Can you perhaps tell me which board
you tested the code on.
Attached please find the console memory dump and the complete source for the
program.
Thank you very much for your help
Regards,
Deon Herbst
“Deon Herbst” <datasyst@mweb.co.za> wrote in message
news:9sr9o4$d23$1@inn.qnx.com…
Hello everyone,
What does the following mean?
“Segmentation Fault”
The error occurs during execution of the following segment of the code
under
the debugger.
We are trying to access the internal memory mapped registers of the 8260
processor.
// #define’s
#define IMM_PHYS_ADDR 0x04700000
#define IMM_SIZE (80 * 1024)
int main(void)
{
UWORD * pIMM;
UWORD tmp;
// map in the physical memory, 0x0470_0000
pIMM = (UWORD *) mmap_device_memory
(0, IMM_SIZE, PROT_READ|PROT_WRITE|PROT_NOCACHE, 0, IMM_PHYS_ADDR);
if ( pIMM == MAP_FAILED ) {
printf( “mmap_device_memory failed” );
exit( EXIT_FAILURE );
}
else {
printf( “pIMM = 0x%08x \r\n”, pIMM);
}
printf(“Thread return value = %d \r\n”, ThreadCtl_r (_NTO_TCTL_IO,
NULL) );
tmp=*pIMM; // this line
generates the “Segmentation Fault”
printf(“tmp=0x%08x\r\n”, tmp);
Regards and thanks,
Ben Strydom
begin 666 dPPregs.c
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end
begin 666 dPPregs.doc
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