ArmPlatformPkg/ArmVExpressDxe: Identify the current platform

Add a function to ArmVExpressDxe to identify the current platform we are running on. This includes ARM32 and AArch64 models and hardware. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Olivier Martin <olivier.martin@arm.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16931 6f19259b-4bc3-4df7-8a09-765794883524
2015-02-25 19:14:26 +00:00
parent df320b1084
commit dff720276a
11 changed files with 365 additions and 18 deletions
--- a/ArmPlatformPkg/ArmVExpressPkg/ArmVExpressDxe/Arm/ArmFvpDxeArm.c
+++ b/ArmPlatformPkg/ArmVExpressPkg/ArmVExpressDxe/Arm/ArmFvpDxeArm.c
@@ -0,0 +1,85 @@
+/** @file
+
+  Copyright (c) 2014, ARM Ltd. All rights reserved.
+
+  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.
+
+**/
+
+#include "ArmVExpressInternal.h"
+#include <Library/ArmPlatformLib.h>  // To get Core Count
+
+//
+// Description of the four ARM model platforms :
+// just the platform id for the time being.
+// Platform ids are defined in ArmVExpressInternal.h for
+// all "ArmVExpress-like" platforms (AARCH64 or ARM architecture,
+// model or hardware platforms).
+//
+CONST ARM_VEXPRESS_PLATFORM ArmVExpressPlatforms[] = {
+  { ARM_FVP_VEXPRESS_A9x4 },
+  { ARM_FVP_VEXPRESS_A15x1 },
+  { ARM_FVP_VEXPRESS_A15x2 },
+  { ARM_FVP_VEXPRESS_A15x4 },
+  { ARM_FVP_VEXPRESS_UNKNOWN }
+};
+
+/**
+  Get information about the VExpress platform the firmware is running on.
+
+  @param[out]  Platform   Address where the pointer to the platform information
+                          (type ARM_VEXPRESS_PLATFORM*) should be stored.
+                          The returned pointer does not point to an allocated
+                          memory area.
+
+  @retval  EFI_SUCCESS    The platform information was returned.
+  @retval  EFI_NOT_FOUND  The platform was not recognised.
+
+**/
+EFI_STATUS
+ArmVExpressGetPlatform (
+  OUT CONST ARM_VEXPRESS_PLATFORM** Platform
+  )
+{
+  UINT32                SysId;
+  UINTN                 CpuType;
+  EFI_STATUS            Status;
+  UINTN                 CoreCount;
+
+  ASSERT (Platform != NULL);
+
+  CpuType   = 0;
+  Status    = EFI_NOT_FOUND;
+  *Platform = NULL;
+
+  SysId = MmioRead32 (ARM_VE_SYS_ID_REG);
+  if (SysId == ARM_RTSM_SYS_ID) {
+    // Get the Cortex-A version
+    CpuType = (ArmReadMidr () >> 4) & ARM_CPU_TYPE_MASK;
+    if (CpuType == ARM_CPU_TYPE_A9) {
+      Status = ArmVExpressGetPlatformFromId (ARM_FVP_VEXPRESS_A9x4, Platform);
+    } else if (CpuType == ARM_CPU_TYPE_A15) {
+      CoreCount = ArmGetCpuCountPerCluster ();
+      if (CoreCount == 1) {
+        Status = ArmVExpressGetPlatformFromId (ARM_FVP_VEXPRESS_A15x1, Platform);
+      } else if (CoreCount == 2) {
+        Status = ArmVExpressGetPlatformFromId (ARM_FVP_VEXPRESS_A15x2, Platform);
+      } else if (CoreCount == 4) {
+        Status = ArmVExpressGetPlatformFromId (ARM_FVP_VEXPRESS_A15x4, Platform);
+      }
+    }
+  }
+
+  if (EFI_ERROR (Status)) {
+    DEBUG ((EFI_D_ERROR, "Unsupported platform (SysId:0x%X, CpuType:0x%X)\n", SysId, CpuType));
+    ASSERT_EFI_ERROR (Status);
+  }
+
+  return Status;
+}