1 /** @file
2
3 Copyright (c) 2014-2015, 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/ArmGicLib.h>
17
18 //
19 // Description of the AARCH64 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_AEMv8x4, FixedPcdGetPtr (PcdFdtFvpVExpressAEMv8x4), L"rtsm_ve-aemv8a.dtb" },
26 { ARM_FVP_BASE_AEMv8x4_AEMv8x4_GICV2, FixedPcdGetPtr (PcdFdtFvpBaseAEMv8x4GicV2), L"fvp-base-gicv2-psci.dtb" },
27 { ARM_FVP_BASE_AEMv8x4_AEMv8x4_GICV2_LEGACY, FixedPcdGetPtr (PcdFdtFvpBaseAEMv8x4GicV2Legacy), L"fvp-base-gicv2legacy-psci.dtb" },
28 { ARM_FVP_BASE_AEMv8x4_AEMv8x4_GICV3, FixedPcdGetPtr (PcdFdtFvpBaseAEMv8x4GicV3), L"fvp-base-gicv3-psci.dtb" },
29 { ARM_FVP_FOUNDATION_GICV2, FixedPcdGetPtr (PcdFdtFvpFoundationGicV2), L"fvp-foundation-gicv2-psci.dtb" },
30 { ARM_FVP_FOUNDATION_GICV2_LEGACY, FixedPcdGetPtr (PcdFdtFvpFoundationGicV2Legacy), L"fvp-foundation-gicv2legacy-psci.dtb" },
31 { ARM_FVP_FOUNDATION_GICV3, FixedPcdGetPtr (PcdFdtFvpFoundationGicV3), L"fvp-foundation-gicv3-psci.dtb" },
32 { ARM_FVP_VEXPRESS_UNKNOWN }
33 };
34
35 /**
36 Get information about the VExpress platform the firmware is running on.
37
38 @param[out] Platform Address where the pointer to the platform information
39 (type ARM_VEXPRESS_PLATFORM*) should be stored.
40 The returned pointer does not point to an allocated
41 memory area.
42
43 @retval EFI_SUCCESS The platform information was returned.
44 @retval EFI_NOT_FOUND The platform was not recognised.
45
46 **/
47 EFI_STATUS
ArmVExpressGetPlatform(OUT CONST ARM_VEXPRESS_PLATFORM ** Platform)48 ArmVExpressGetPlatform (
49 OUT CONST ARM_VEXPRESS_PLATFORM** Platform
50 )
51 {
52 EFI_STATUS Status;
53 UINT32 SysId;
54 UINT32 FvpSysId;
55 UINT32 VariantSysId;
56 ARM_GIC_ARCH_REVISION GicRevision;
57
58 ASSERT (Platform != NULL);
59
60 Status = EFI_NOT_FOUND;
61
62 SysId = MmioRead32 (ARM_VE_SYS_ID_REG);
63 if (SysId != ARM_RTSM_SYS_ID) {
64 // Remove the GIC variant to identify if we are running on the FVP Base or
65 // Foundation models
66 FvpSysId = SysId & (ARM_FVP_SYS_ID_HBI_MASK |
67 ARM_FVP_SYS_ID_PLAT_MASK );
68 // Extract the variant from the SysId
69 VariantSysId = SysId & ARM_FVP_SYS_ID_VARIANT_MASK;
70
71 if (FvpSysId == ARM_FVP_BASE_BOARD_SYS_ID) {
72 if (VariantSysId == ARM_FVP_GIC_VE_MMAP) {
73 // FVP Base Model with legacy GIC memory map
74 Status = ArmVExpressGetPlatformFromId (ARM_FVP_BASE_AEMv8x4_AEMv8x4_GICV2_LEGACY, Platform);
75 } else {
76 GicRevision = ArmGicGetSupportedArchRevision ();
77
78 if (GicRevision == ARM_GIC_ARCH_REVISION_2) {
79 // FVP Base Model with GICv2 support
80 Status = ArmVExpressGetPlatformFromId (ARM_FVP_BASE_AEMv8x4_AEMv8x4_GICV2, Platform);
81 } else {
82 // FVP Base Model with GICv3 support
83 Status = ArmVExpressGetPlatformFromId (ARM_FVP_BASE_AEMv8x4_AEMv8x4_GICV3, Platform);
84 }
85 }
86 } else if (FvpSysId == ARM_FVP_FOUNDATION_BOARD_SYS_ID) {
87 if (VariantSysId == ARM_FVP_GIC_VE_MMAP) {
88 // FVP Foundation Model with legacy GIC memory map
89 Status = ArmVExpressGetPlatformFromId (ARM_FVP_FOUNDATION_GICV2_LEGACY, Platform);
90 } else {
91 GicRevision = ArmGicGetSupportedArchRevision ();
92
93 if (GicRevision == ARM_GIC_ARCH_REVISION_2) {
94 // FVP Foundation Model with GICv2
95 Status = ArmVExpressGetPlatformFromId (ARM_FVP_FOUNDATION_GICV2, Platform);
96 } else {
97 // FVP Foundation Model with GICv3
98 Status = ArmVExpressGetPlatformFromId (ARM_FVP_FOUNDATION_GICV3, Platform);
99 }
100 }
101 }
102 } else {
103 // FVP Versatile Express AEMv8
104 Status = ArmVExpressGetPlatformFromId (ARM_FVP_VEXPRESS_AEMv8x4, Platform);
105 }
106
107 if (EFI_ERROR (Status)) {
108 DEBUG ((EFI_D_ERROR, "Unsupported AArch64 RTSM (SysId:0x%X).\n", SysId));
109 ASSERT_EFI_ERROR (Status);
110 }
111
112 return Status;
113 }
114