OK.
Tom, here's a simple test.
After this we will know for sure whether mmap works, or not.
I hard-coded the physical memory offset to
1ff00100000 (this seems to be what you have), you can find out the real offset
for the first resource from lspci -vv or from cat /proc/iomem.
You have to be root to run.
==================================
#define BAR0 0x1ff00100000ull
#define _XOPEN_SOURCE 500
#define _FILE_OFFSET_BITS 64
#include <sys/mman.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
int main()
{
int fd;
void *ptr;
unsigned value;
unsigned long long offset = BAR0;
fd = open("/dev/mem",O_RDWR | O_SYNC);
if (fd<0) {
perror("open");
return 1;
}
ptr = mmap(NULL, 0x100000, PROT_READ | PROT_WRITE,
MAP_SHARED, fd, offset);
if ( (! ptr) || (ptr == MAP_FAILED) ) {
perror("map");
return 1;
}
value= *( (unsigned*)(ptr + 0x000f0014) );
printf("value at 0x000f0014 is %#8.8x\n", value);
return 0;
err:
return 1;
}
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