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From 6f89eae9f2abe20e35058848e7cc10a69a6b05ec Mon Sep 17 00:00:00 2001
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From: Laszlo Ersek <lersek@redhat.com>
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Date: Wed, 14 Oct 2015 13:49:43 +0200
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Subject: [PATCH] ArmPlatformPkg: introduce fixed PCD for early hello message
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(RH only)
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Drew has proposed that ARM|AARCH64 platform firmware (especially virtual
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machine firmware) print a reasonably early, simple hello message to the
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serial port, regardless of debug mask settings. This should inform
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interactive users, and provide some rough help in localizing boot
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problems, even with restrictive debug masks.
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If a platform doesn't want this feature, it should stick with the default
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empty string.
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RHBZ: https://bugzilla.redhat.com/show_bug.cgi?id=1270279
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Downstream only:
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<http://thread.gmane.org/gmane.comp.bios.edk2.devel/2996/focus=3433>.
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Notes about the 20160608b-988715a -> 20170228-c325e41585e3 rebase:
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- no changes
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Notes about the 20170228-c325e41585e3 -> 20171011-92d07e48907f rebase:
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- no changes
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Suggested-by: Drew Jones <drjones@redhat.com>
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Contributed-under: TianoCore Contribution Agreement 1.0
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Signed-off-by: Laszlo Ersek <lersek@redhat.com>
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(cherry picked from commit 7ce97b06421434c82095f01a1753a8c9c546cc30)
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(cherry picked from commit 20b1f1cbd0590aa71c6d99d35e23cf08e0707750)
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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---
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ArmPlatformPkg/ArmPlatformPkg.dec | 7 +++++++
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1 file changed, 7 insertions(+)
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diff --git a/ArmPlatformPkg/ArmPlatformPkg.dec b/ArmPlatformPkg/ArmPlatformPkg.dec
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index 5f67e74154..2956d3e2d8 100644
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--- a/ArmPlatformPkg/ArmPlatformPkg.dec
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+++ b/ArmPlatformPkg/ArmPlatformPkg.dec
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@@ -113,6 +113,13 @@
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## If set, this will swap settings for HDLCD RED_SELECT and BLUE_SELECT registers
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gArmPlatformTokenSpaceGuid.PcdArmHdLcdSwapBlueRedSelect|FALSE|BOOLEAN|0x00000045
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+ #
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+ # Early hello message (ASCII string), printed to the serial port.
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+ # If set to the empty string, nothing is printed.
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+ # Otherwise, a trailing CRLF should be specified explicitly.
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+ #
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+ gArmPlatformTokenSpaceGuid.PcdEarlyHelloMessage|""|VOID*|0x00000100
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+
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[PcdsFixedAtBuild.common,PcdsDynamic.common]
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## PL031 RealTimeClock
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gArmPlatformTokenSpaceGuid.PcdPL031RtcBase|0x0|UINT32|0x00000024
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