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Kernel: Assume 8042 controller is present if ACPI FADT revision <= 1

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This field wasn't specified until revision 2 and should be assumed to
be set on older versions.
This commit is contained in:
Tom 2020-11-07 12:06:41 -07:00 • committed by Andreas Kling
commit e1c27c16d8
Notes: sideshowbarker 2024-07-19 01:25:26 +09:00
2 changed files with 6 additions and 1 deletions
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2
Kernel/ACPI/Parser.cpp
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@ -104,7 +104,7 @@ void Parser::init_fadt()
klog() << "ACPI: Fixed ACPI data, Revision " << sdt->h.revision << ", Length " << sdt->h.length << " bytes";
klog() << "ACPI: DSDT " << PhysicalAddress(sdt->dsdt_ptr);
m_x86_specific_flags.cmos_rtc_not_present = (sdt->ia_pc_boot_arch_flags & (u8)FADTFlags::IA_PC_Flags::CMOS_RTC_Not_Present);
m_x86_specific_flags.keyboard_8042 = (sdt->ia_pc_boot_arch_flags & (u8)FADTFlags::IA_PC_Flags::PS2_8042);
m_x86_specific_flags.keyboard_8042 = (sdt->h.revision <= 1) || (sdt->ia_pc_boot_arch_flags & (u8)FADTFlags::IA_PC_Flags::PS2_8042);
m_x86_specific_flags.legacy_devices = (sdt->ia_pc_boot_arch_flags & (u8)FADTFlags::IA_PC_Flags::Legacy_Devices);
m_x86_specific_flags.msi_not_supported = (sdt->ia_pc_boot_arch_flags & (u8)FADTFlags::IA_PC_Flags::MSI_Not_Supported);
m_x86_specific_flags.vga_not_present = (sdt->ia_pc_boot_arch_flags & (u8)FADTFlags::IA_PC_Flags::VGA_Not_Present);