From 03e0a729a5c3ebcab8806d136cd8908627bd91c9 Mon Sep 17 00:00:00 2001
From: Ard Biesheuvel <ardb@kernel.org>
Date: Mon, 24 Oct 2022 16:45:02 +0200
Subject: [PATCH 02/18] OvmfPkg/VirtNorFlashDxe: remove CheckBlockLocked
 feature

RH-Author: Gerd Hoffmann <None>
RH-MergeRequest: 43: OvmfPkg/VirtNorFlashDxe backport
RH-Jira: RHEL-17587
RH-Acked-by: Laszlo Ersek <lersek@redhat.com>
RH-Commit: [4/20] 990bdf373801df8107d8a6ec4db3fb93e5a6ad68

We inherited a feature from the ArmPlatformPkg version of this driver
that never gets enabled. Let's remove it.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Sunil V L <sunilvl@ventanamicro.com>
(cherry picked from commit 0a64106c566273ff8ef951d56ddfa972fe65bd6c)
---
 OvmfPkg/VirtNorFlashDxe/VirtNorFlash.c      | 35 +++++----------------
 OvmfPkg/VirtNorFlashDxe/VirtNorFlashDxe.inf |  3 --
 2 files changed, 8 insertions(+), 30 deletions(-)

diff --git a/OvmfPkg/VirtNorFlashDxe/VirtNorFlash.c b/OvmfPkg/VirtNorFlashDxe/VirtNorFlash.c
index 12fa720dad..59a562efdf 100644
--- a/OvmfPkg/VirtNorFlashDxe/VirtNorFlash.c
+++ b/OvmfPkg/VirtNorFlashDxe/VirtNorFlash.c
@@ -65,35 +65,16 @@ NorFlashUnlockSingleBlock (
   // Raise the Task Priority Level to TPL_NOTIFY to serialise all its operations
   // and to protect shared data structures.
 
-  if (FeaturePcdGet (PcdNorFlashCheckBlockLocked) == TRUE) {
-    do {
-      // Request a lock setup
-      SEND_NOR_COMMAND (BlockAddress, 0, P30_CMD_LOCK_BLOCK_SETUP);
+  // Request a lock setup
+  SEND_NOR_COMMAND (BlockAddress, 0, P30_CMD_LOCK_BLOCK_SETUP);
 
-      // Request an unlock
-      SEND_NOR_COMMAND (BlockAddress, 0, P30_CMD_UNLOCK_BLOCK);
+  // Request an unlock
+  SEND_NOR_COMMAND (BlockAddress, 0, P30_CMD_UNLOCK_BLOCK);
 
-      // Send command for reading device id
-      SEND_NOR_COMMAND (BlockAddress, 2, P30_CMD_READ_DEVICE_ID);
-
-      // Read block lock status
-      LockStatus = MmioRead32 (CREATE_NOR_ADDRESS (BlockAddress, 2));
-
-      // Decode block lock status
-      LockStatus = FOLD_32BIT_INTO_16BIT (LockStatus);
-    } while ((LockStatus & 0x1) == 1);
-  } else {
-    // Request a lock setup
-    SEND_NOR_COMMAND (BlockAddress, 0, P30_CMD_LOCK_BLOCK_SETUP);
-
-    // Request an unlock
-    SEND_NOR_COMMAND (BlockAddress, 0, P30_CMD_UNLOCK_BLOCK);
-
-    // Wait until the status register gives us the all clear
-    do {
-      LockStatus = NorFlashReadStatusRegister (Instance, BlockAddress);
-    } while ((LockStatus & P30_SR_BIT_WRITE) != P30_SR_BIT_WRITE);
-  }
+  // Wait until the status register gives us the all clear
+  do {
+    LockStatus = NorFlashReadStatusRegister (Instance, BlockAddress);
+  } while ((LockStatus & P30_SR_BIT_WRITE) != P30_SR_BIT_WRITE);
 
   // Put device back into Read Array mode
   SEND_NOR_COMMAND (BlockAddress, 0, P30_CMD_READ_ARRAY);
diff --git a/OvmfPkg/VirtNorFlashDxe/VirtNorFlashDxe.inf b/OvmfPkg/VirtNorFlashDxe/VirtNorFlashDxe.inf
index 1bf50e4823..53e9d58204 100644
--- a/OvmfPkg/VirtNorFlashDxe/VirtNorFlashDxe.inf
+++ b/OvmfPkg/VirtNorFlashDxe/VirtNorFlashDxe.inf
@@ -24,7 +24,6 @@
   VirtNorFlashFvb.c
 
 [Packages]
-  ArmPlatformPkg/ArmPlatformPkg.dec
   EmbeddedPkg/EmbeddedPkg.dec
   MdePkg/MdePkg.dec
   MdeModulePkg/MdeModulePkg.dec
@@ -66,7 +65,5 @@
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareBase
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareSize
 
-  gArmPlatformTokenSpaceGuid.PcdNorFlashCheckBlockLocked
-
 [Depex]
   gEfiCpuArchProtocolGuid
-- 
2.41.0