On 1/31/2019 2:55 PM, Ni, Ray wrote:
On 1/31/2019 1:00 PM, Digant H Solanki wrote:
BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=1454
Based on latest IGD OpRegion Spec, IGD_OPREGION_MBOX3 needs to be
updated with two new members : Physical Address of Raw VBT Data (RVDA)
and Size of Raw VBT Data (RVDS)
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Digant H Solanki <digant.h.sola...@intel.com>
Cc: Liming Gao <liming....@intel.com>
Cc: Chaganty, Rangasai V <rangasai.v.chaga...@intel.com>
Cc: Ni, Ray <ray...@intel.com>
---
IntelSiliconPkg/Include/IndustryStandard/IgdOpRegion.h | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/IntelSiliconPkg/Include/IndustryStandard/IgdOpRegion.h
b/IntelSiliconPkg/Include/IndustryStandard/IgdOpRegion.h
index 5ce80a5be8..1c83efee40 100644
--- a/IntelSiliconPkg/Include/IndustryStandard/IgdOpRegion.h
+++ b/IntelSiliconPkg/Include/IndustryStandard/IgdOpRegion.h
@@ -4,9 +4,7 @@
https://01.org/sites/default/files/documentation/skl_opregion_rev0p5.pdf
- @note Fixed bug in the spec Mailbox3 - RM31 size from 0x45(69) to
0x46(70)
-
- Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
+ Copyright (c) 2016 - 2019, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of
the BSD License
which accompanies this distribution. The full text of the license
may be found at
@@ -118,7 +116,9 @@ typedef struct {
UINT64 FDSS; ///< Offset 0x3AA DSS Buffer address
allocated for IFFS feature
UINT32 FDSP; ///< Offset 0x3B2 Size of DSS buffer
UINT32 STAT; ///< Offset 0x3B6 State Indicator
- UINT8 RM31[0x46]; ///< Offset 0x3BA - 0x3FF Reserved Must be
zero. Bug in spec 0x45(69)
+ UINT64 RVDA; ///< Offset 0x3BA Physical address of Raw VBT
data. Added from Spec Version 0.90 to support VBT greater than 6KB.
+ UINT32 RVDS; ///< Offset 0x3C2 Size of Raw VBT data. Added
from Spec Version 0.90 to support VBT greater than 6KB.
+ UINT8 RM31[0x3A]; ///< Offset 0x3C6 - 0x3FF Reserved Must be
zero.
} IGD_OPREGION_MBOX3;
///
Sorry seems my comment was missed in previous mail.
Is it possible that an existing consumer is already using
RM31 to access RVDA and RVDS? For example,
using " * (UINT64 *) RM31[0]" to access RVDA.
If it's possible, I suggest we rename "RM31" to a different name.
Otherwise, the original code that modifies RVDA using RM may
incorrectly modifies bytes at offset 0x3C6.
A build failure instead of a silent failure can be seen with the rename.
--
Thanks,
Ray
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