--- /dev/null
+#include <pci.h>
+#include <string.h>
+
+int main(int argc, char **argv)
+{
+ unsigned int bus, dev, fn, addr;
+ unsigned char type = 'b';
+ unsigned int datum;
+
+ if (iopl(3) < 0)
+ {
+ perror("iopl");
+ return 1;
+ }
+
+ if ((argc < 5) || (argc > 7))
+ {
+ usage:
+ printf("usage: %s bus dev fn addr [b|w|l [datum]]\n", argv[0]);
+ return 2;
+ }
+
+ bus = strtoul(argv[1], NULL, 0);
+ dev = strtoul(argv[2], NULL, 0);
+ fn = strtoul(argv[3], NULL, 0);
+ addr = strtoul(argv[4], NULL, 0);
+
+ if (argc > 5)
+ type = *argv[5];
+
+ if (argc > 6)
+ {
+ datum = strtoul(argv[6], NULL, 0);
+ switch (type)
+ {
+ case 'b':
+ datum &= 0xFF;
+ pci_write8(bus, dev, fn, addr, datum);
+ printf("Wrote byte 0x%02x to %02x:%02x.%x[%02x]\n", datum, bus, dev, fn, addr);
+ break;
+ case 'w':
+ datum &= 0xFFFF;
+ pci_write16(bus, dev, fn, addr, datum);
+ printf("Wrote word 0x%04x to %02x:%02x.%x[%02x]\n", datum, bus, dev, fn, addr);
+ break;
+ case 'l':
+ pci_write32(bus, dev, fn, addr, datum);
+ printf("Wrote long 0x%08x to %02x:%02x.%x[%02x]\n", datum, bus, dev, fn, addr);
+ break;
+ default:
+ goto usage;
+ }
+ } else {
+ switch(type)
+ {
+ case 'b':
+ datum = pci_read8(bus, dev, fn, addr);
+ printf("Read byte 0x%02x from %02x:%02x.%x[%02x]\n", datum, bus, dev, fn, addr);
+ break;
+ case 'w':
+ datum = pci_read16(bus, dev, fn, addr);
+ printf("Read word 0x%04x from %02x:%02x.%x[%02x]\n", datum, bus, dev, fn, addr);
+ break;
+ case 'l':
+ datum = pci_read32(bus, dev, fn, addr);
+ printf("Read long 0x%08x from %02x:%02x.%x[%02x]\n", datum, bus, dev, fn, addr);
+ break;
+ default:
+ goto usage;
+ }
+ }
+}