tools/poke-rls.c

   1 #include <sys/io.h>
   2 #include <reg-82801b.h>
   3 #include <string.h>
   4 #include <stdint.h>
   5 #include <stdlib.h>
   6
   7 static uint16_t _get_PMBASE()
   8 {
   9         static long pmbase = -1;
  10
  11         if (pmbase == -1)
  12                 pmbase = pci_read32(ICH2_LPC_BUS, ICH2_LPC_DEV, ICH2_LPC_FN, ICH2_LPC_PCI_PMBASE) & ICH2_PMBASE_MASK;
  13
  14         return pmbase;
  15 }
  16
  17 typedef struct {
  18         uint32_t signature;
  19         uint32_t type;
  20         uint8_t data[];
  21 } packet_t;
  22
  23 extern unsigned int poke(unsigned long addr, unsigned long * value);
  24
  25 int main(int argc, char **argv)
  26 {
  27         unsigned int res;
  28         packet_t * packet = (packet_t *)memalign(4096, sizeof(packet_t));
  29
  30         packet->signature = 0x1BADD00D;
  31         packet->type = 42;
  32         strcpy(packet->data, "hello, world!");
  33
  34         if (iopl(3) < 0)
  35         {
  36                 perror("iopl");
  37                 return 1;
  38         }
  39
  40         res = poke(_get_PMBASE() + 0x04, (void *)packet);
  41         printf("returned %p\n", res);
  42
  43         if (res == 42) {
  44                 printf("%s\n", packet->data);
  45                 printf("%s\n", packet->data+41);
  46                 printf("%s\n", packet->data+82);
  47                 printf("%s\n", packet->data+123);
  48         }
  49 }