diff options
Diffstat (limited to 'docs/plat/socionext-uniphier.rst')
| -rw-r--r-- | docs/plat/socionext-uniphier.rst | 16 |
1 files changed, 7 insertions, 9 deletions
diff --git a/docs/plat/socionext-uniphier.rst b/docs/plat/socionext-uniphier.rst index 82b9b503..964dd1db 100644 --- a/docs/plat/socionext-uniphier.rst +++ b/docs/plat/socionext-uniphier.rst @@ -8,10 +8,11 @@ UniPhier SoC family implements its internal boot ROM, which loads 64KB [1]_ image from a non-volatile storage to the on-chip SRAM, and jumps over to it. TF-A provides a special mode, BL2-AT-EL3, which enables BL2 to execute at EL3. It is useful for platforms with non-TF-A boot ROM, like UniPhier. Here, a -problem is BL2 does not fit in the 64KB limit if `Trusted Board Boot`_ (TBB) -is enabled. To solve this issue, Socionext provides a first stage loader -called `UniPhier BL`_. This loader runs in the on-chip SRAM, initializes the -DRAM, expands BL2 there, and hands the control over to it. Therefore, all images +problem is BL2 does not fit in the 64KB limit if +:ref:`Trusted Board Boot (TBB) <Trusted Board Boot>` is enabled. +To solve this issue, Socionext provides a first stage loader called +`UniPhier BL`_. This loader runs in the on-chip SRAM, initializes the DRAM, +expands BL2 there, and hands the control over to it. Therefore, all images of TF-A run in DRAM. The UniPhier platform works with/without TBB. See below for the build process @@ -50,7 +51,7 @@ Boot Flow 4. BL31, BL32, and BL33 - They all run in the DRAM. See `Firmware Design`_ for details. + They all run in the DRAM. See :ref:`Firmware Design` for details. Basic Build @@ -79,7 +80,7 @@ Optional features - Trusted Board Boot `mbed TLS`_ is needed as the cryptographic and image parser modules. - Refer to the `User Guide`_ for the appropriate version of mbed TLS. + Refer to the :ref:`User Guide` for the appropriate version of mbed TLS. To enable TBB, add the following options to the build command:: @@ -109,9 +110,6 @@ Optional features .. [1] Some SoCs can load 80KB, but the software implementation must be aligned to the lowest common denominator. -.. _Trusted Board Boot: ../trusted-board-boot.rst .. _UniPhier BL: https://github.com/uniphier/uniphier-bl -.. _Firmware Design: ../firmware-design.rst .. _U-Boot: https://www.denx.de/wiki/U-Boot .. _mbed TLS: https://tls.mbed.org/ -.. _User Guide: ../user-guide.rst |