drivers/xen/core/firmware.c

   1 #include <linux/kernel.h>
   2 #include <linux/string.h>
   3 #include <linux/errno.h>
   4 #include <linux/init.h>
   5 #include <linux/edd.h>
   6 #include <video/edid.h>
   7 #include <xen/interface/platform.h>
   8 #include <asm/hypervisor.h>
   9
  10 #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
  11 void __init copy_edd(void)
  12 {
  13         int ret;
  14         struct xen_platform_op op;
  15
  16         if (!is_initial_xendomain())
  17                 return;
  18
  19         op.cmd = XENPF_firmware_info;
  20
  21         op.u.firmware_info.type = XEN_FW_DISK_INFO;
  22         for (op.u.firmware_info.index = 0;
  23              edd.edd_info_nr < EDDMAXNR;
  24              op.u.firmware_info.index++) {
  25                 struct edd_info *info = edd.edd_info + edd.edd_info_nr;
  26
  27                 info->params.length = sizeof(info->params);
  28                 set_xen_guest_handle(op.u.firmware_info.u.disk_info.edd_params,
  29                                      &info->params);
  30                 ret = HYPERVISOR_platform_op(&op);
  31                 if (ret)
  32                         break;
  33
  34 #define C(x) info->x = op.u.firmware_info.u.disk_info.x
  35                 C(device);
  36                 C(version);
  37                 C(interface_support);
  38                 C(legacy_max_cylinder);
  39                 C(legacy_max_head);
  40                 C(legacy_sectors_per_track);
  41 #undef C
  42
  43                 edd.edd_info_nr++;
  44         }
  45
  46         op.u.firmware_info.type = XEN_FW_DISK_MBR_SIGNATURE;
  47         for (op.u.firmware_info.index = 0;
  48              edd.mbr_signature_nr < EDD_MBR_SIG_MAX;
  49              op.u.firmware_info.index++) {
  50                 ret = HYPERVISOR_platform_op(&op);
  51                 if (ret)
  52                         break;
  53                 edd.mbr_signature[edd.mbr_signature_nr++] =
  54                         op.u.firmware_info.u.disk_mbr_signature.mbr_signature;
  55         }
  56 }
  57 #endif
  58
  59 void __init copy_edid(void)
  60 {
  61 #if defined(CONFIG_FIRMWARE_EDID) && defined(CONFIG_X86)
  62         struct xen_platform_op op;
  63
  64         if (!is_initial_xendomain())
  65                 return;
  66
  67         op.cmd = XENPF_firmware_info;
  68         op.u.firmware_info.index = 0;
  69         op.u.firmware_info.type = XEN_FW_VBEDDC_INFO;
  70         set_xen_guest_handle(op.u.firmware_info.u.vbeddc_info.edid,
  71                              edid_info.dummy);
  72         if (HYPERVISOR_platform_op(&op) != 0)
  73                 memset(edid_info.dummy, 0x13, sizeof(edid_info.dummy));
  74 #endif
  75 }