/* 
 * pcitest.c - read the contents of specific pci device registers
 *             the device is memory mapped at address 0xa006000
 *
 */

#include <stdio.h>
#include <errno.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>

int main() {
    void *map;
    int fd;
    int i = 0;
    char buf[16];
    ulong base;
    ulong length;

    // 1090  14e44320  34  a0006000  00000000  00000000  00000000  00000000  00000000  00000000  
    //                     00002000  00000000  00000000  00000000  00000000  00000000  00000000        
    // 
    
    base = 0xa0006000;
    length = 0x2000;
    // base = 0x0;
    
    fd = open("/dev/mem", O_RDWR|O_SYNC);
    
    map = mmap(NULL, length, PROT_READ | PROT_WRITE, MAP_SHARED, fd, base);
    if (map == MAP_FAILED) {
        printf("map failed: %s\n", strerror(errno));
        exit(1);
    }

    for (i = 0x0; i <= length; i = i + 0x10) {
        memcpy(&buf, map + i, 0x10);
        printf("0x%04x: %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", base + i, 
                buf[1], buf[2], buf[3], buf[4], buf[5], buf[6], buf[7], buf[8], buf[9], buf[10], buf[11], buf[12], buf[13], buf[14], buf[15]);
    }
}