[PATCH v2] ArmPlatformPkg: convert VExpress ResetSystemLib to ResetSystemLib

[Leif Lindholm <leif.lindholm@linaro.org>]

Since we're in the process of migrating all of the VExpress platforms
to MdeModulePkg ResetSystemRuntimeDxe, convert VExpress ResetSystemLib
from EfiResetSystemLib interface to the ResetSystemLib one.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org>
---
 .../Library/ResetSystemLib/ResetSystemLib.c        | 117 ++++++++++++---------
 .../Library/ResetSystemLib/ResetSystemLib.inf      |   6 +-
 2 files changed, 73 insertions(+), 50 deletions(-)

diff --git a/ArmPlatformPkg/ArmVExpressPkg/Library/ResetSystemLib/ResetSystemLib.c b/ArmPlatformPkg/ArmVExpressPkg/Library/ResetSystemLib/ResetSystemLib.c
index bafb6f8093..d2bc4a88fa 100644
--- a/ArmPlatformPkg/ArmVExpressPkg/Library/ResetSystemLib/ResetSystemLib.c
+++ b/ArmPlatformPkg/ArmVExpressPkg/Library/ResetSystemLib/ResetSystemLib.c
@@ -5,6 +5,7 @@
 
   Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
   Copyright (c) 2013, ARM Ltd. All rights reserved.<BR>
+  Copyright (c) 2017, Linaro Ltd. All rights reserved.<BR>
 
   This program and the accompanying materials
   are licensed and made available under the terms and conditions of the BSD License
@@ -16,73 +17,95 @@
 
 **/
 
-#include <PiDxe.h>
+#include <Base.h>
 
-#include <Library/BaseLib.h>
-#include <Library/DebugLib.h>
-#include <Library/EfiResetSystemLib.h>
 #include <Library/ArmPlatformSysConfigLib.h>
+#include <Library/DebugLib.h>
+#include <Library/ResetSystemLib.h>
 
 #include <ArmPlatform.h>
 
 /**
-  Resets the entire platform.
+  This function causes a system-wide reset (cold reset), in which
+  all circuitry within the system returns to its initial state. This type of
+  reset is asynchronous to system operation and operates without regard to
+  cycle boundaries.
 
-  @param  ResetType             The type of reset to perform.
-  @param  ResetStatus           The status code for the reset.
-  @param  DataSize              The size, in bytes, of WatchdogData.
-  @param  ResetData             For a ResetType of EfiResetCold, EfiResetWarm, or
-                                EfiResetShutdown the data buffer starts with a Null-terminated
-                                Unicode string, optionally followed by additional binary data.
+  If this function returns, it means that the system does not support cold
+  reset.
+**/
+VOID
+EFIAPI
+ResetCold (
+  VOID
+  )
+{
+  ArmPlatformSysConfigSet (SYS_CFG_REBOOT, 0);
+}
+
+/**
+  This function causes a system-wide initialization (warm reset), in which all
+  processors are set to their initial state. Pending cycles are not corrupted.
 
+  If this function returns, it means that the system does not support warm
+  reset.
 **/
-EFI_STATUS
+VOID
 EFIAPI
-LibResetSystem (
-  IN EFI_RESET_TYPE   ResetType,
-  IN EFI_STATUS       ResetStatus,
-  IN UINTN            DataSize,
-  IN CHAR16           *ResetData OPTIONAL
+ResetWarm (
+  VOID
   )
 {
-  switch (ResetType) {
-  case EfiResetPlatformSpecific:
-    // Map the platform specific reset as reboot
-  case EfiResetWarm:
-    // Map a warm reset into a cold reset
-  case EfiResetCold:
-    // Send the REBOOT function to the platform microcontroller
-    ArmPlatformSysConfigSet (SYS_CFG_REBOOT, 0);
-
-    // We should never be here
-    while(1);
-  case EfiResetShutdown:
-    // Send the SHUTDOWN function to the platform microcontroller
-    ArmPlatformSysConfigSet (SYS_CFG_SHUTDOWN, 0);
-
-    // We should never be here
-    while(1);
-  }
-
-  ASSERT(FALSE);
-  return EFI_UNSUPPORTED;
+  ResetCold ();
 }
 
 /**
-  Initialize any infrastructure required for LibResetSystem () to function.
+  This function causes the system to enter a power state equivalent
+  to the ACPI G2/S5 or G3 states.
+
+  If this function returns, it means that the system does not support shut down reset.
+**/
+VOID
+EFIAPI
+ResetShutdown (
+  VOID
+  )
+{
+  ArmPlatformSysConfigSet (SYS_CFG_SHUTDOWN, 0);
+}
 
-  @param  ImageHandle   The firmware allocated handle for the EFI image.
-  @param  SystemTable   A pointer to the EFI System Table.
+/**
+  This function causes the system to enter S3 and then wake up immediately.
 
-  @retval EFI_SUCCESS   The constructor always returns EFI_SUCCESS.
+  If this function returns, it means that the system does not support S3
+  feature.
+**/
+VOID
+EFIAPI
+EnterS3WithImmediateWake (
+  VOID
+  )
+{
+  // not implemented
+}
 
+/**
+  This function causes a systemwide reset. The exact type of the reset is
+  defined by the EFI_GUID that follows the Null-terminated Unicode string passed
+  into ResetData. If the platform does not recognize the EFI_GUID in ResetData
+  the platform must pick a supported reset type to perform.The platform may
+  optionally log the parameters from any non-normal reset that occurs.
+
+  @param[in]  DataSize   The size, in bytes, of ResetData.
+  @param[in]  ResetData  The data buffer starts with a Null-terminated string,
+                         followed by the EFI_GUID.
 **/
-EFI_STATUS
+VOID
 EFIAPI
-LibInitializeResetSystem (
-  IN EFI_HANDLE        ImageHandle,
-  IN EFI_SYSTEM_TABLE  *SystemTable
+ResetPlatformSpecific (
+  IN UINTN   DataSize,
+  IN VOID    *ResetData
   )
 {
-  return EFI_SUCCESS;
+  ResetCold ();
 }
diff --git a/ArmPlatformPkg/ArmVExpressPkg/Library/ResetSystemLib/ResetSystemLib.inf b/ArmPlatformPkg/ArmVExpressPkg/Library/ResetSystemLib/ResetSystemLib.inf
index 8c17ea8cdb..780636c1de 100644
--- a/ArmPlatformPkg/ArmVExpressPkg/Library/ResetSystemLib/ResetSystemLib.inf
+++ b/ArmPlatformPkg/ArmVExpressPkg/Library/ResetSystemLib/ResetSystemLib.inf
@@ -2,6 +2,7 @@
 # Reset System lib to make it easy to port new platforms
 #
 # Copyright (c) 2008, Apple Inc. All rights reserved.<BR>
+# Copyright (c) 2017, Linaro Ltd. All rights reserved.<BR>
 #
 #  This program and the accompanying materials
 #  are licensed and made available under the terms and conditions of the BSD License
@@ -19,17 +20,16 @@
   FILE_GUID                      = 36885202-0854-4373-bfd2-95d229b44d44
   MODULE_TYPE                    = BASE
   VERSION_STRING                 = 1.0
-  LIBRARY_CLASS                  = EfiResetSystemLib
+  LIBRARY_CLASS                  = ResetSystemLib
 
 [Sources.common]
   ResetSystemLib.c
 
 [Packages]
+  MdeModulePkg/MdeModulePkg.dec
   MdePkg/MdePkg.dec
-  EmbeddedPkg/EmbeddedPkg.dec
   ArmPlatformPkg/ArmPlatformPkg.dec
 
 [LibraryClasses]
   DebugLib
-  BaseLib
   ArmPlatformSysConfigLib
-- 
2.11.0