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From 39f95bb22c03b18ac6c4ef1b4485414dd4a303cb Mon Sep 17 00:00:00 2001
From: Abhimanyu Saini <abhimanyu.saini@nxp.com>
Date: Fri, 24 Jun 2016 14:37:42 +0530
Subject: [PATCH 65/93] docs: fsl-ppa: Add documentation for PPA trusted FW
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Signed-off-by: Abhimanyu Saini <abhimanyu.saini@nxp.com>
---
doc/README.fsl-ppa | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)
create mode 100644 doc/README.fsl-ppa
diff --git a/doc/README.fsl-ppa b/doc/README.fsl-ppa
new file mode 100644
index 0000000..76cd01f
--- /dev/null
+++ b/doc/README.fsl-ppa
@@ -0,0 +1,26 @@
+PPA FW for U-boot
+
+Summary
+=======
+PPA is a trusted firmware for ARMv8 , that handles smc calls from lower
+exception levels, like power state co-ordination interface call or
+smc calls to trusted OS from the Linux kernel.
+
+Notes
+=====
+
+1. Currenly, u-boot run at the highest exception level processor
+ supported, which is EL3 in case of ARMv8, if PPA FW is incorporated
+ U-boot copies it to secure location in DDR.
+2. During init U-boot passes control to PPA FW and before returning
+ the core jumps to EL2.
+
+Using PPA
+=========
+1. Ensure CONFIG_FSL_LS_PPA is set for your platform
+2. Program PPA binary on address CONFIG_SYS_LS_PPA_FW_ADDR on flash
+
+Contributors
+============
+ Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
+ Abhimanyu Saini <abhimanyu.saini@nxp.com>
--
1.7.9.5
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