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Paul Beesleyd2fcc4e2019-05-29 13:59:40 +01001Arm Development Platform Build Options
2======================================
3
4Arm Platform Build Options
5--------------------------
6
7- ``ARM_BL31_IN_DRAM``: Boolean option to select loading of BL31 in TZC secured
8 DRAM. By default, BL31 is in the secure SRAM. Set this flag to 1 to load
9 BL31 in TZC secured DRAM. If TSP is present, then setting this option also
10 sets the TSP location to DRAM and ignores the ``ARM_TSP_RAM_LOCATION`` build
11 flag.
12
13- ``ARM_CONFIG_CNTACR``: boolean option to unlock access to the ``CNTBase<N>``
14 frame registers by setting the ``CNTCTLBase.CNTACR<N>`` register bits. The
15 frame number ``<N>`` is defined by ``PLAT_ARM_NSTIMER_FRAME_ID``, which
16 should match the frame used by the Non-Secure image (normally the Linux
17 kernel). Default is true (access to the frame is allowed).
18
19- ``ARM_DISABLE_TRUSTED_WDOG``: boolean option to disable the Trusted Watchdog.
20 By default, Arm platforms use a watchdog to trigger a system reset in case
21 an error is encountered during the boot process (for example, when an image
22 could not be loaded or authenticated). The watchdog is enabled in the early
23 platform setup hook at BL1 and disabled in the BL1 prepare exit hook. The
24 Trusted Watchdog may be disabled at build time for testing or development
25 purposes.
26
27- ``ARM_LINUX_KERNEL_AS_BL33``: The Linux kernel expects registers x0-x3 to
28 have specific values at boot. This boolean option allows the Trusted Firmware
29 to have a Linux kernel image as BL33 by preparing the registers to these
30 values before jumping to BL33. This option defaults to 0 (disabled). For
31 AArch64 ``RESET_TO_BL31`` and for AArch32 ``RESET_TO_SP_MIN`` must be 1 when
32 using it. If this option is set to 1, ``ARM_PRELOADED_DTB_BASE`` must be set
33 to the location of a device tree blob (DTB) already loaded in memory. The
34 Linux Image address must be specified using the ``PRELOADED_BL33_BASE``
35 option.
36
37- ``ARM_PLAT_MT``: This flag determines whether the Arm platform layer has to
38 cater for the multi-threading ``MT`` bit when accessing MPIDR. When this flag
39 is set, the functions which deal with MPIDR assume that the ``MT`` bit in
40 MPIDR is set and access the bit-fields in MPIDR accordingly. Default value of
41 this flag is 0. Note that this option is not used on FVP platforms.
42
43- ``ARM_RECOM_STATE_ID_ENC``: The PSCI1.0 specification recommends an encoding
44 for the construction of composite state-ID in the power-state parameter.
45 The existing PSCI clients currently do not support this encoding of
46 State-ID yet. Hence this flag is used to configure whether to use the
47 recommended State-ID encoding or not. The default value of this flag is 0,
48 in which case the platform is configured to expect NULL in the State-ID
49 field of power-state parameter.
50
51- ``ARM_ROTPK_LOCATION``: used when ``TRUSTED_BOARD_BOOT=1``. It specifies the
52 location of the ROTPK hash returned by the function ``plat_get_rotpk_info()``
53 for Arm platforms. Depending on the selected option, the proper private key
54 must be specified using the ``ROT_KEY`` option when building the Trusted
55 Firmware. This private key will be used by the certificate generation tool
56 to sign the BL2 and Trusted Key certificates. Available options for
57 ``ARM_ROTPK_LOCATION`` are:
58
59 - ``regs`` : return the ROTPK hash stored in the Trusted root-key storage
Max Shvetsov06dba292019-12-06 11:50:12 +000060 registers.
Paul Beesleyd2fcc4e2019-05-29 13:59:40 +010061 - ``devel_rsa`` : return a development public key hash embedded in the BL1
62 and BL2 binaries. This hash has been obtained from the RSA public key
63 ``arm_rotpk_rsa.der``, located in ``plat/arm/board/common/rotpk``. To use
64 this option, ``arm_rotprivk_rsa.pem`` must be specified as ``ROT_KEY``
65 when creating the certificates.
66 - ``devel_ecdsa`` : return a development public key hash embedded in the BL1
67 and BL2 binaries. This hash has been obtained from the ECDSA public key
68 ``arm_rotpk_ecdsa.der``, located in ``plat/arm/board/common/rotpk``. To
69 use this option, ``arm_rotprivk_ecdsa.pem`` must be specified as
70 ``ROT_KEY`` when creating the certificates.
71
Max Shvetsov06dba292019-12-06 11:50:12 +000072- ``ARM_ROTPK_HASH``: used when ``ARM_ROTPK_LOCATION=devel_*``. Specifies the
73 location of the ROTPK hash. Not expected to be a build option. This defaults to
74 ``plat/arm/board/common/rotpk/*_sha256.bin`` depending on the specified algorithm.
75 Providing ``ROT_KEY`` enforces generation of the hash from the ``ROT_KEY`` and
76 overwrites the default hash file.
77
Paul Beesleyd2fcc4e2019-05-29 13:59:40 +010078- ``ARM_TSP_RAM_LOCATION``: location of the TSP binary. Options:
79
80 - ``tsram`` : Trusted SRAM (default option when TBB is not enabled)
81 - ``tdram`` : Trusted DRAM (if available)
82 - ``dram`` : Secure region in DRAM (default option when TBB is enabled,
83 configured by the TrustZone controller)
84
85- ``ARM_XLAT_TABLES_LIB_V1``: boolean option to compile TF-A with version 1
86 of the translation tables library instead of version 2. It is set to 0 by
87 default, which selects version 2.
88
89- ``ARM_CRYPTOCELL_INTEG`` : bool option to enable TF-A to invoke ArmĀ®
90 TrustZoneĀ® CryptoCell functionality for Trusted Board Boot on capable Arm
91 platforms. If this option is specified, then the path to the CryptoCell
92 SBROM library must be specified via ``CCSBROM_LIB_PATH`` flag.
93
94For a better understanding of these options, the Arm development platform memory
95map is explained in the :ref:`Firmware Design`.
96
97.. _build_options_arm_css_platform:
98
99Arm CSS Platform-Specific Build Options
100---------------------------------------
101
102- ``CSS_DETECT_PRE_1_7_0_SCP``: Boolean flag to detect SCP version
103 incompatibility. Version 1.7.0 of the SCP firmware made a non-backwards
104 compatible change to the MTL protocol, used for AP/SCP communication.
105 TF-A no longer supports earlier SCP versions. If this option is set to 1
106 then TF-A will detect if an earlier version is in use. Default is 1.
107
108- ``CSS_LOAD_SCP_IMAGES``: Boolean flag, which when set, adds SCP_BL2 and
109 SCP_BL2U to the FIP and FWU_FIP respectively, and enables them to be loaded
110 during boot. Default is 1.
111
112- ``CSS_USE_SCMI_SDS_DRIVER``: Boolean flag which selects SCMI/SDS drivers
113 instead of SCPI/BOM driver for communicating with the SCP during power
114 management operations and for SCP RAM Firmware transfer. If this option
115 is set to 1, then SCMI/SDS drivers will be used. Default is 0.
116
Vijayenthiran Subramaniambc489912019-12-26 17:45:58 +0530117 - ``CSS_SGI_CHIP_COUNT``: Configures the number of chips on a SGI/RD platform
118 which supports multi-chip operation. If ``CSS_SGI_CHIP_COUNT`` is set to any
119 valid value greater than 1, the platform code performs required configuration
120 to support multi-chip operation.
121
Paul Beesleyd2fcc4e2019-05-29 13:59:40 +0100122--------------
123
Max Shvetsov06dba292019-12-06 11:50:12 +0000124*Copyright (c) 2019-2020, Arm Limited. All rights reserved.*