hikey: Add UEFI sources for reference
UEFI needs to be built outside Android build system.
Please follow the instructions in README.
The sources correspond to:
https://github.com/96boards/edk2/commit/14eae0c12e71fd33c4c0fc51e4475e8db02566cf
https://github.com/96boards/arm-trusted-firmware/commit/e9b4909dcd75fc4ae7041cfb83d28ab9adb7afdf
https://github.com/96boards/l-loader/commit/6b784ad5c4ab00e2b1c6f53cd5f74054e5d00a78
https://git.linaro.org/uefi/uefi-tools.git/commit/abe618f8ab72034fff1ce46c9c006a2c6bd40a7e
Change-Id: Ieeefdb63e673e0c8e64e0a1f02c7bddc63b2c7fb
Signed-off-by: Vishal Bhoj <vishal.bhoj@linaro.org>
diff --git a/uefi/linaro-edk2/MdePkg/Include/Ppi/Stall.h b/uefi/linaro-edk2/MdePkg/Include/Ppi/Stall.h
new file mode 100644
index 0000000..ebd93d6
--- /dev/null
+++ b/uefi/linaro-edk2/MdePkg/Include/Ppi/Stall.h
@@ -0,0 +1,62 @@
+/** @file
+ This file declares Stall PPI.
+
+ This ppi abstracts the blocking stall service to other agents.
+
+ Copyright (c) 2006 - 2008, 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
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+ @par Revision Reference:
+ This PPI is introduced in PI Version 1.0.
+
+**/
+
+#ifndef __STALL_PPI_H__
+#define __STALL_PPI_H__
+
+#define EFI_PEI_STALL_PPI_GUID \
+ { 0x1f4c6f90, 0xb06b, 0x48d8, {0xa2, 0x01, 0xba, 0xe5, 0xf1, 0xcd, 0x7d, 0x56 } }
+
+typedef struct _EFI_PEI_STALL_PPI EFI_PEI_STALL_PPI;
+
+/**
+ The Stall() function provides a blocking stall for at least the number
+ of microseconds stipulated in the final argument of the API.
+
+ @param PeiServices An indirect pointer to the PEI Services Table
+ published by the PEI Foundation.
+ @param This Pointer to the local data for the interface.
+ @param Microseconds Number of microseconds for which to stall.
+
+ @retval EFI_SUCCESS The service provided at least the required delay.
+
+**/
+typedef
+EFI_STATUS
+(EFIAPI *EFI_PEI_STALL)(
+ IN CONST EFI_PEI_SERVICES **PeiServices,
+ IN CONST EFI_PEI_STALL_PPI *This,
+ IN UINTN Microseconds
+ );
+
+///
+/// This service provides a simple, blocking stall with platform-specific resolution.
+///
+struct _EFI_PEI_STALL_PPI {
+ ///
+ /// The resolution in microseconds of the stall services.
+ ///
+ UINTN Resolution;
+
+ EFI_PEI_STALL Stall;
+};
+
+extern EFI_GUID gEfiPeiStallPpiGuid;
+
+#endif