1 /** @file
2
3 Copyright (c) 2014, ARM Ltd. All rights reserved.
4
5 This program and the accompanying materials are licensed and made available
6 under the terms and conditions of the BSD License which accompanies this
7 distribution. The full text of the license may be found at
8 http://opensource.org/licenses/bsd-license.php
9
10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT
11 WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
12
13 **/
14
15 #include "ArmVExpressInternal.h"
16 #include <Library/ArmPlatformLib.h> // To get Core Count
17
18 //
19 // Description of the four ARM model platforms :
20 // Platform ids are defined in ArmVExpressInternal.h for
21 // all "ArmVExpress-like" platforms (AARCH64 or ARM architecture,
22 // model or hardware platforms).
23 //
24 CONST ARM_VEXPRESS_PLATFORM ArmVExpressPlatforms[] = {
25 { ARM_FVP_VEXPRESS_A9x4, FixedPcdGetPtr (PcdFdtVExpressFvpA9x4), L"rtsm_ve-cortex_a9x4.dtb" },
26 { ARM_FVP_VEXPRESS_A15x1, FixedPcdGetPtr (PcdFdtVExpressFvpA15x1), L"rtsm_ve-cortex_a15x1.dtb" },
27 { ARM_FVP_VEXPRESS_A15x2, FixedPcdGetPtr (PcdFdtVExpressFvpA15x2), L"rtsm_ve-cortex_a15x2.dtb" },
28 { ARM_FVP_VEXPRESS_A15x4, FixedPcdGetPtr (PcdFdtVExpressFvpA15x4), L"rtsm_ve-cortex_a15x4.dtb" },
29 { ARM_FVP_VEXPRESS_UNKNOWN, }
30 };
31
32 /**
33 Get information about the VExpress platform the firmware is running on.
34
35 @param[out] Platform Address where the pointer to the platform information
36 (type ARM_VEXPRESS_PLATFORM*) should be stored.
37 The returned pointer does not point to an allocated
38 memory area.
39
40 @retval EFI_SUCCESS The platform information was returned.
41 @retval EFI_NOT_FOUND The platform was not recognised.
42
43 **/
44 EFI_STATUS
ArmVExpressGetPlatform(OUT CONST ARM_VEXPRESS_PLATFORM ** Platform)45 ArmVExpressGetPlatform (
46 OUT CONST ARM_VEXPRESS_PLATFORM** Platform
47 )
48 {
49 UINT32 SysId;
50 UINTN CpuType;
51 EFI_STATUS Status;
52 UINTN CoreCount;
53
54 ASSERT (Platform != NULL);
55
56 CpuType = 0;
57 Status = EFI_NOT_FOUND;
58 *Platform = NULL;
59
60 SysId = MmioRead32 (ARM_VE_SYS_ID_REG);
61 if (SysId == ARM_RTSM_SYS_ID) {
62 // Get the Cortex-A version
63 CpuType = (ArmReadMidr () >> 4) & ARM_CPU_TYPE_MASK;
64 if (CpuType == ARM_CPU_TYPE_A9) {
65 Status = ArmVExpressGetPlatformFromId (ARM_FVP_VEXPRESS_A9x4, Platform);
66 } else if (CpuType == ARM_CPU_TYPE_A15) {
67 CoreCount = ArmGetCpuCountPerCluster ();
68 if (CoreCount == 1) {
69 Status = ArmVExpressGetPlatformFromId (ARM_FVP_VEXPRESS_A15x1, Platform);
70 } else if (CoreCount == 2) {
71 Status = ArmVExpressGetPlatformFromId (ARM_FVP_VEXPRESS_A15x2, Platform);
72 } else if (CoreCount == 4) {
73 Status = ArmVExpressGetPlatformFromId (ARM_FVP_VEXPRESS_A15x4, Platform);
74 }
75 }
76 }
77
78 if (EFI_ERROR (Status)) {
79 DEBUG ((EFI_D_ERROR, "Unsupported platform (SysId:0x%X, CpuType:0x%X)\n", SysId, CpuType));
80 ASSERT_EFI_ERROR (Status);
81 }
82
83 return Status;
84 }
85