arch/x86/kernel/eisa.c

   1 /*
   2  * EISA specific code
   3  *
   4  * This file is licensed under the GPL V2
   5  */
   6 #include <linux/ioport.h>
   7 #include <linux/eisa.h>
   8 #include <linux/io.h>
   9
  10 #include <xen/xen.h>
  11
  12 static __init int eisa_bus_probe(void)
  13 {
  14         void __iomem *p;
  15
  16         if (xen_pv_domain() && !xen_initial_domain())
  17                 return 0;
  18
  19         p = ioremap(0x0FFFD9, 4);
  20         if (p && readl(p) == 'E' + ('I' << 8) + ('S' << 16) + ('A' << 24))
  21                 EISA_bus = 1;
  22         iounmap(p);
  23         return 0;
  24 }
  25 subsys_initcall(eisa_bus_probe);