arch/x86/kernel/platform-quirks.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/kernel.h>
   3 #include <linux/init.h>
   4 #include <linux/pnp.h>
   5
   6 #include <asm/setup.h>
   7 #include <asm/bios_ebda.h>
   8
   9 void __init x86_early_init_platform_quirks(void)
  10 {
  11         x86_platform.legacy.i8042 = X86_LEGACY_I8042_EXPECTED_PRESENT;
  12         x86_platform.legacy.rtc = 1;
  13         x86_platform.legacy.warm_reset = 1;
  14         x86_platform.legacy.reserve_bios_regions = 0;
  15         x86_platform.legacy.devices.pnpbios = 1;
  16
  17         switch (boot_params.hdr.hardware_subarch) {
  18         case X86_SUBARCH_PC:
  19                 x86_platform.legacy.reserve_bios_regions = 1;
  20                 break;
  21         case X86_SUBARCH_XEN:
  22                 x86_platform.legacy.devices.pnpbios = 0;
  23                 x86_platform.legacy.rtc = 0;
  24                 break;
  25         case X86_SUBARCH_INTEL_MID:
  26         case X86_SUBARCH_CE4100:
  27                 x86_platform.legacy.devices.pnpbios = 0;
  28                 x86_platform.legacy.rtc = 0;
  29                 x86_platform.legacy.i8042 = X86_LEGACY_I8042_PLATFORM_ABSENT;
  30                 break;
  31         }
  32
  33         if (x86_platform.set_legacy_features)
  34                 x86_platform.set_legacy_features();
  35 }
  36
  37 bool __init x86_pnpbios_disabled(void)
  38 {
  39         return x86_platform.legacy.devices.pnpbios == 0;
  40 }
  41
  42 #if defined(CONFIG_PNPBIOS)
  43 bool __init arch_pnpbios_disabled(void)
  44 {
  45         return x86_pnpbios_disabled();
  46 }
  47 #endif