derek/gem5
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

dev,arch-x86: Implement some self test 8042 commands.

Browse Source 
The self test in particular is used by bare metal software to ensure
that the keyboard controller is reset and ready to use.

Change-Id: I53c2a80c181b9d19617c75657637e06951c94433
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/55806
Reviewed-by: Matthew Poremba <matthew.poremba@amd.com>
Maintainer: Gabe Black <gabe.black@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
This commit is contained in:
Gabe Black
2022-01-23 03:00:02 -08:00
parent e1e261c1d1
commit ccb5f8f8b3
1 changed files with 18 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
src/dev/x86/i8042.cc
View File

@@ -226,11 +226,26 @@ X86ISA::I8042::write(PacketPtr pkt)
commandByte.disableMouse = 0;
break;
case TestMouse:
panic("i8042 \"Test mouse\" command not implemented.\n");
// The response to this is from the 8042, not the mouse.
// Hard code no errors detected.
writeData(0x00);
break;
case SelfTest:
panic("i8042 \"Self test\" command not implemented.\n");
// Exactly what this does is essentially undocumented, but this:
// https://www.os2museum.com/wp/
// ibm-pcat-8042-keyboard-controller-commands/
// says that this should essentially reset some values.
commandByte.convertScanCodes = 1;
commandByte.disableMouse = 1;
commandByte.disableKeyboard = 1;
commandByte.passedSelfTest = 1;
statusReg.passedSelfTest = 1;
writeData(0x55); // Self test passed.
break;
case InterfaceTest:
panic("i8042 \"Interface test\" command not implemented.\n");
// Hard code no errors detected.
writeData(0x00);
break;
case DiagnosticDump:
panic("i8042 \"Diagnostic dump\" command not implemented.\n");
case DisableKeyboard: