feat(allwinner): add support for allwinner A133 SoC

Add support for Allwinner A133 SoC. Although A133 comes with A2,
the size of SRAM A2 section is limited i.e 64KB. So running all
functional part of BL31 needs custom changes to reduce the size.

Instead of running from SRAM, support is added to run from DRAM
as like H616. This port is tested with both AXP707 and AXP717 PMIC,
multi-core booting and reset handling works.

The newly introduced build target sun50i_a133 is aimed to support the
following Allwinner SoCs:
- A100
- A133
- A133P
- R818
- T800

While here, mention H64 and H700 SoCs as well.

Change-Id: I94605240ef9e4b1ac9078a8b0f692ffe8b9d1094
Co-developed-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Signed-off-by: Parthiban Nallathambi <parthiban@linumiz.com>
Signed-off-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>

1 files changed, 23 insertions, 24 deletions

diff --git a/docs/plat/allwinner.rst b/docs/plat/allwinner.rst
index 8e967dcde..59b2075c0 100644
--- a/docs/plat/allwinner.rst
+++ b/docs/plat/allwinner.rst
@@ -10,23 +10,19 @@ Building TF-A
 
 There is one build target per supported SoC:
 
-+------+-------------------+
-| SoC  | TF-A build target |
-+======+===================+
-| A64  | sun50i_a64        |
-+------+-------------------+
-| H5   | sun50i_a64        |
-+------+-------------------+
-| H6   | sun50i_h6         |
-+------+-------------------+
-| H616 | sun50i_h616       |
-+------+-------------------+
-| H313 | sun50i_h616       |
-+------+-------------------+
-| T507 | sun50i_h616       |
-+------+-------------------+
-| R329 | sun50i_r329       |
-+------+-------------------+
++-------------------+-------------------------------+
+| TF-A build target | Supported SoCs                |
++===================+===============================+
+| sun50i_a133       | A100, A133, A133P, R818, T800 |
++-------------------+-------------------------------+
+| sun50i_a64        | A64, H5, H64                  |
++-------------------+-------------------------------+
+| sun50i_h6         | H6                            |
++-------------------+-------------------------------+
+| sun50i_h616       | H313, H616, H700, T507        |
++-------------------+-------------------------------+
+| sun50i_r329       | R329                          |
++-------------------+-------------------------------+
 
 To build with the default settings for a particular SoC:
 
@@ -123,14 +119,17 @@ The mapping we use on those SoCs is as follows:
    0 64K         16M       160M    192M  256M             virtual address
 
 
-H616 SoC
-~~~~~~~~
+A133, H616 SoCs
+~~~~~~~~~~~~~~~
 
-The H616 lacks the secure SRAM region present on the other SoCs, also
-lacks the "ARISC" management processor (SCP) we use. BL31 thus needs to
-run from DRAM, which prevents our compressed virtual memory map described
-above. Since running in DRAM also lifts the restriction of the limited
-SRAM size, we use the normal 1:1 mapping with 32 bits worth of virtual
+The H616 lacks the secure SRAM region present on the other SoCs, also lacks the
+"ARISC" management processor (SCP) we use.
+
+In A133 the size of SRAM A2 section is limited to 64KB.
+
+BL31 thus needs to run from DRAM, which prevents our compressed virtual memory
+map described above. Since running in DRAM also lifts the restriction of the
+limited SRAM size, we use the normal 1:1 mapping with 32 bits worth of virtual
 address space. So the virtual addresses used in BL31 match the physical
 addresses as presented above.