GNU Linux-libre 4.14.266-gnu1
[releases.git] / 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