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 41