arch/x86/kernel/platform-quirks.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/kernel.h>
   3 #include <linux/init.h>
   4
   5 #include <asm/setup.h>
   6 #include <asm/bios_ebda.h>
   7
   8 void __init x86_early_init_platform_quirks(void)
   9 {
  10         x86_platform.legacy.i8042 = X86_LEGACY_I8042_EXPECTED_PRESENT;
  11         x86_platform.legacy.rtc = 1;
  12         x86_platform.legacy.reserve_bios_regions = 0;
  13         x86_platform.legacy.devices.pnpbios = 1;
  14
  15         switch (boot_params.hdr.hardware_subarch) {
  16         case X86_SUBARCH_PC:
  17                 x86_platform.legacy.reserve_bios_regions = 1;
  18                 break;
  19         case X86_SUBARCH_XEN:
  20                 x86_platform.legacy.devices.pnpbios = 0;
  21                 x86_platform.legacy.rtc = 0;
  22                 break;
  23         case X86_SUBARCH_INTEL_MID:
  24         case X86_SUBARCH_CE4100:
  25                 x86_platform.legacy.devices.pnpbios = 0;
  26                 x86_platform.legacy.rtc = 0;
  27                 x86_platform.legacy.i8042 = X86_LEGACY_I8042_PLATFORM_ABSENT;
  28                 break;
  29         }
  30
  31         if (x86_platform.set_legacy_features)
  32                 x86_platform.set_legacy_features();
  33 }
  34
  35 #if defined(CONFIG_PNPBIOS)
  36 bool __init arch_pnpbios_disabled(void)
  37 {
  38         return x86_platform.legacy.devices.pnpbios == 0;
  39 }
  40 #endif