doc: Split the User Guide into multiple files
The User Guide document has grown organically over time and
now covers a wide range of topics, making it difficult to
skim read and extract information from. Currently, it covers
these topics and maybe a couple more:
- Requirements (hardware, tools, libs)
- Checking out the repo
- Basic build instructions
- A comprehensive list of build flags
- FIP packaging
- Building specifically for Juno
- Firmware update images
- EL3 payloads
- Preloaded BL33 boot flow
- Running on FVPs
- Running on Juno
I have separated these out into a few groups that become new
documents. Broadly speaking, build instructions for the tools,
for TF-A generally, and for specific scenarios are separated.
Content relating to specific platforms (Juno and the FVPs are
Arm-specific platforms, essentially) has been moved into the
documentation that is specific to those platforms, under
docs/plat/arm.
Change-Id: Ica87c52d8cd4f577332be0b0738998ea3ba3bbec
Signed-off-by: Paul Beesley <paul.beesley@arm.com>
diff --git a/docs/design/trusted-board-boot.rst b/docs/design/trusted-board-boot.rst
index f3b1c36..49e8adb 100644
--- a/docs/design/trusted-board-boot.rst
+++ b/docs/design/trusted-board-boot.rst
@@ -187,8 +187,8 @@
The Trusted Board Boot implementation spans both generic and platform-specific
BL1 and BL2 code, and in tool code on the host build machine. The feature is
-enabled through use of specific build flags as described in the
-:ref:`User Guide`.
+enabled through use of specific build flags as described in
+:ref:`Build Options`.
On the host machine, a tool generates the certificates, which are included in
the FIP along with the boot loader images. These certificates are loaded in
@@ -222,9 +222,12 @@
The certificates are also stored individually in the in the output build
directory.
-The tool resides in the ``tools/cert_create`` directory. It uses OpenSSL SSL
-library version 1.0.1 or later to generate the X.509 certificates. Instructions
-for building and using the tool can be found in the :ref:`User Guide`.
+The tool resides in the ``tools/cert_create`` directory. It uses the OpenSSL SSL
+library version to generate the X.509 certificates. The specific version of the
+library that is required is given in the :ref:`Prerequisites` document.
+
+Instructions for building and using the tool can be found at
+:ref:`tools_build_cert_create`.
--------------