From ddb3084986db65a9006d28d5e9b6f0f7969cf2c0 Mon Sep 17 00:00:00 2001 From: Laszlo Ersek Date: Wed, 14 Oct 2015 13:49:43 +0200 Subject: [PATCH] ArmPlatformPkg: introduce fixed PCD for early hello message (RH only) Drew has proposed that ARM|AARCH64 platform firmware (especially virtual machine firmware) print a reasonably early, simple hello message to the serial port, regardless of debug mask settings. This should inform interactive users, and provide some rough help in localizing boot problems, even with restrictive debug masks. If a platform doesn't want this feature, it should stick with the default empty string. RHBZ: https://bugzilla.redhat.com/show_bug.cgi?id=1270279 Downstream only: . Notes about the 20160608b-988715a -> 20170228-c325e41585e3 rebase: - no changes Notes about the 20170228-c325e41585e3 -> 20171011-92d07e48907f rebase: - no changes Suggested-by: Drew Jones Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Laszlo Ersek (cherry picked from commit 7ce97b06421434c82095f01a1753a8c9c546cc30) (cherry picked from commit 20b1f1cbd0590aa71c6d99d35e23cf08e0707750) Signed-off-by: Paolo Bonzini --- ArmPlatformPkg/ArmPlatformPkg.dec | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/ArmPlatformPkg/ArmPlatformPkg.dec b/ArmPlatformPkg/ArmPlatformPkg.dec index 44c00bd0c1..40c8ec3251 100644 --- a/ArmPlatformPkg/ArmPlatformPkg.dec +++ b/ArmPlatformPkg/ArmPlatformPkg.dec @@ -114,6 +114,13 @@ ## If set, this will swap settings for HDLCD RED_SELECT and BLUE_SELECT registers gArmPlatformTokenSpaceGuid.PcdArmHdLcdSwapBlueRedSelect|FALSE|BOOLEAN|0x00000045 + # + # Early hello message (ASCII string), printed to the serial port. + # If set to the empty string, nothing is printed. + # Otherwise, a trailing CRLF should be specified explicitly. + # + gArmPlatformTokenSpaceGuid.PcdEarlyHelloMessage|""|VOID*|0x00000100 + [PcdsFixedAtBuild.common,PcdsDynamic.common] ## PL031 RealTimeClock gArmPlatformTokenSpaceGuid.PcdPL031RtcBase|0x0|UINT32|0x00000024