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authorHarry Liebel <Harry.Liebel@arm.com>2014-04-01 19:28:07 +0100
committerHarry Liebel <Harry.Liebel@arm.com>2014-04-24 19:34:01 +0100
commitce19cf1bb56cfa72155b0c7f5d6c07bbf6efc11f (patch)
tree850417aea3a8bd5bba14bcce4cb2097ad3c1b725 /docs/firmware-design.md
parentf2199d95d931826be7f87af0935ac536812d0488 (diff)
downloadarm-trusted-firmware-ce19cf1bb56cfa72155b0c7f5d6c07bbf6efc11f.tar.gz
FVP secure memory support documentation
Fixes ARM-software/tf-issues#64 Change-Id: I4e56c25f9dc7f486fbf6fa2f7d8253874119b989
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@@ -207,15 +207,17 @@ bits.
#### Platform initialization
-BL2 does not perform any platform initialization that affects subsequent
-stages of the ARM Trusted Firmware or normal world software. It copies the
-information regarding the trusted SRAM populated by BL1 using a
+BL2 copies the information regarding the trusted SRAM populated by BL1 using a
platform-specific mechanism. It calculates the limits of DRAM (main memory)
to determine whether there is enough space to load the BL3-3 image. A platform
defined base address is used to specify the load address for the BL3-1 image.
It also defines the extents of memory available for use by the BL3-2 image.
BL2 also initializes UART0 (PL011 console), which enables access to the
-`printf` family of functions in BL2
+`printf` family of functions in BL2. Platform security is initialized to allow
+access to access controlled components. On the Base FVP a TrustZone controller
+(TZC-400) is configured to give full access to the platform DRAM. The storage
+abstraction layer is initialized which is used to load further bootloader
+images.
#### BL3-1 (EL3 Runtime Firmware) image load