1 From 39f95bb22c03b18ac6c4ef1b4485414dd4a303cb Mon Sep 17 00:00:00 2001
2 From: Abhimanyu Saini <abhimanyu.saini@nxp.com>
3 Date: Fri, 24 Jun 2016 14:37:42 +0530
4 Subject: [PATCH 65/93] docs: fsl-ppa: Add documentation for PPA trusted FW
6 Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
7 Signed-off-by: Abhimanyu Saini <abhimanyu.saini@nxp.com>
9 doc/README.fsl-ppa | 26 ++++++++++++++++++++++++++
10 1 file changed, 26 insertions(+)
11 create mode 100644 doc/README.fsl-ppa
13 diff --git a/doc/README.fsl-ppa b/doc/README.fsl-ppa
15 index 0000000..76cd01f
17 +++ b/doc/README.fsl-ppa
23 +PPA is a trusted firmware for ARMv8 , that handles smc calls from lower
24 +exception levels, like power state co-ordination interface call or
25 +smc calls to trusted OS from the Linux kernel.
30 +1. Currenly, u-boot run at the highest exception level processor
31 + supported, which is EL3 in case of ARMv8, if PPA FW is incorporated
32 + U-boot copies it to secure location in DDR.
33 +2. During init U-boot passes control to PPA FW and before returning
34 + the core jumps to EL2.
38 +1. Ensure CONFIG_FSL_LS_PPA is set for your platform
39 +2. Program PPA binary on address CONFIG_SYS_LS_PPA_FW_ADDR on flash
43 + Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
44 + Abhimanyu Saini <abhimanyu.saini@nxp.com>