Add PCD for selecting terminal type at build time

Add a fixed pointer PCD to allow build-time selection of VT100 or TTY terminal
type.  The default remains VT100 emulation.
Add support for building the ARM QEMU platforms with the TTY terminal
with the "-D TTY_TERMINAL" build option.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
[Roy Franz: minor edits: add TtyTerminal GUID, rename LINUX_TERMINAL to TTY_TERMINAL]
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Roy Franz <roy.franz@linaro.org>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17898 6f19259b-4bc3-4df7-8a09-765794883524

ArmVirtPkg/Library/PlatformIntelBdsLib/IntelBdsPlatform.c

@@ -35,7 +35,7 @@
 typedef struct {
   VENDOR_DEVICE_PATH         SerialDxe;
   UART_DEVICE_PATH           Uart;
-  VENDOR_DEFINED_DEVICE_PATH Vt100;
+  VENDOR_DEFINED_DEVICE_PATH TermType;
   EFI_DEVICE_PATH_PROTOCOL   End;
 } PLATFORM_SERIAL_CONSOLE;
 #pragma pack ()
@@ -67,14 +67,16 @@ STATIC PLATFORM_SERIAL_CONSOLE mSerialConsole = {
   },
 
   //
-  // VENDOR_DEFINED_DEVICE_PATH Vt100
+  // VENDOR_DEFINED_DEVICE_PATH TermType
   //
   {
     {
       MESSAGING_DEVICE_PATH, MSG_VENDOR_DP,
       DP_NODE_LEN (VENDOR_DEFINED_DEVICE_PATH)
-    },
-    EFI_VT_100_GUID
+    }
+    //
+    // Guid to be filled in dynamically
+    //
   },
 
   //
@@ -421,6 +423,8 @@ PlatformBdsPolicyBehavior (
   //
   // Add the hardcoded serial console device path to ConIn, ConOut, ErrOut.
   //
+  CopyGuid (&mSerialConsole.TermType.Guid,
+    PcdGetPtr (PcdTerminalTypeGuidBuffer));
   BdsLibUpdateConsoleVariable (L"ConIn",
     (EFI_DEVICE_PATH_PROTOCOL *)&mSerialConsole, NULL);
   BdsLibUpdateConsoleVariable (L"ConOut",

ArmVirtPkg/Library/PlatformIntelBdsLib/PlatformIntelBdsLib.inf

@@ -39,6 +39,7 @@
   MdeModulePkg/MdeModulePkg.dec
   MdePkg/MdePkg.dec
   OvmfPkg/OvmfPkg.dec
+  ArmVirtPkg/ArmVirtPkg.dec
 
 [LibraryClasses]
   BaseLib
@@ -61,6 +62,9 @@
   gEfiMdePkgTokenSpaceGuid.PcdUartDefaultParity
   gEfiMdePkgTokenSpaceGuid.PcdUartDefaultStopBits
 
+[Pcd]
+  gArmVirtTokenSpaceGuid.PcdTerminalTypeGuidBuffer
+
 [Guids]
   gEfiFileInfoGuid
   gEfiFileSystemInfoGuid