From 0ba0723c769f95d312835967c47e34e444fea368 Mon Sep 17 00:00:00 2001
From: kavsrf <kavsrf@gmail.com>
Date: Tue, 13 Jun 2017 17:19:47 +0300
Subject: solution of HP problem via DrverOrder and BML modified driver

---
 Library/CommonLib/CommonLib.inf |  1 +
 Library/CommonLib/EfiBml.c      | 57 +++++++++++++++++++++++++++++++++++++++++
 Library/CommonLib/EfiVar.c      | 27 +++++++++++++++++++
 3 files changed, 85 insertions(+)
 create mode 100644 Library/CommonLib/EfiBml.c

(limited to 'Library')

diff --git a/Library/CommonLib/CommonLib.inf b/Library/CommonLib/CommonLib.inf
index dde5c61..ec658d7 100644
--- a/Library/CommonLib/CommonLib.inf
+++ b/Library/CommonLib/CommonLib.inf
@@ -39,6 +39,7 @@
   EfiBluetooth.c
   EfiTpm.c
   GptRead.c
+  EfiBml.c
 
 [Sources.IA32]
   IA32/EfiCpuHalt.asm
diff --git a/Library/CommonLib/EfiBml.c b/Library/CommonLib/EfiBml.c
new file mode 100644
index 0000000..184ca75
--- /dev/null
+++ b/Library/CommonLib/EfiBml.c
@@ -0,0 +1,57 @@
+/** @file
+EFI DCS BML helpers routines/wrappers
+
+Copyright (c) 2016. Disk Cryptography Services for EFI (DCS), Alex Kolotnikov
+Copyright (c) 2016. VeraCrypt, Mounir IDRASSI 
+
+This program and the accompanying materials are licensed and made available
+under the terms and conditions of the GNU Lesser General Public License, version 3.0 (LGPL-3.0).
+
+The full text of the license may be found at
+https://opensource.org/licenses/LGPL-3.0
+**/
+
+#include <Library/CommonLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Protocol/DcsBmlProto.h>
+
+//////////////////////////////////////////////////////////////////////////
+// BML
+//////////////////////////////////////////////////////////////////////////
+EFI_HANDLE*                gBmlHandles = NULL;
+UINTN                      gBmlCount = 0;
+EFI_DCSBML_PROTOCOL*	   gBml = NULL;
+EFI_GUID                   gBmlGuid = EFI_DCSBML_INTERFACE_PROTOCOL_GUID;
+
+EFI_STATUS
+BmlSelect(
+    IN UINTN index) {
+    if (index < gBmlCount) {
+        return gBS->HandleProtocol(gBmlHandles[index], &gBmlGuid, (VOID**)&gBml);
+    }
+    return EFI_NOT_FOUND;
+}
+
+EFI_STATUS
+InitBml() {
+	EFI_STATUS	res;
+	// BML control if supported
+	res = EfiGetHandles(ByProtocol, &gBmlGuid, 0, &gBmlHandles, &gBmlCount);
+	if (gBmlCount > 0) {
+		return BmlSelect(gBmlCount - 1);
+    }
+    return EFI_NOT_FOUND;
+}
+
+
+EFI_STATUS
+BmlLock(
+	IN BOOLEAN lock
+	)
+{
+	if (gBml != NULL) {
+        return gBml->BootMenuLock(gBml, lock);
+	}
+	return EFI_UNSUPPORTED;
+}
+
diff --git a/Library/CommonLib/EfiVar.c b/Library/CommonLib/EfiVar.c
index fad6eb5..e9c1082 100644
--- a/Library/CommonLib/EfiVar.c
+++ b/Library/CommonLib/EfiVar.c
@@ -145,6 +145,33 @@ BootOrderRemove(
 	return res;
 }
 
+EFI_STATUS
+BootOrderPresent(
+    IN CHAR16 *OrderVarName,
+    UINT16   value)
+{
+    EFI_STATUS res = EFI_NOT_READY;
+    UINT16*   varBootOrder;
+    UINTN     varBootOrderSize;
+    UINT32    varBootOrderAttr;
+    UINTN     BootOrderCount;
+    UINTN     i;
+    UINTN     j;
+
+    res = EfiGetVar(OrderVarName, &gEfiGlobalVariableGuid, &varBootOrder, &varBootOrderSize, &varBootOrderAttr);
+    if (EFI_ERROR(res)) return res;
+    BootOrderCount = varBootOrderSize / sizeof(UINT16);
+    res = EFI_NOT_FOUND;
+    for (j = 0, i = 0; i < BootOrderCount; ++i) {
+        if (varBootOrder[i] == value) {
+            MEM_FREE(varBootOrder);
+            res = EFI_SUCCESS;
+            break;
+        }
+    }
+    return res;
+}
+
 EFI_STATUS
 BootMenuItemRemove(
 	IN CHAR16     *VarName
-- 
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