powerpc/doc: Update the README.srio-pcie-boot-corenet

1. Misalignment will be found in the doc/README.srio-pcie-boot-corenet
   file when the tabs are set to 8 characters. And the standard for
   u-boot should be 8 character tabs! So this issue should be amended.

2. Add a NOTE for the ENV parameters of the Slave.

Signed-off-by: Liu Gang <Gang.Liu@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>

diff --git a/doc/README.srio-pcie-boot-corenet b/doc/README.srio-pcie-boot-corenet
index cd7e7ee9b346e4c1323c33f731ee1cf035a650f0..2b1f76b8d0287a993df33f9c0d72c72564ffddd9 100644 (file)
--- a/doc/README.srio-pcie-boot-corenet
+++ b/doc/README.srio-pcie-boot-corenet
@@ -21,13 +21,13 @@ Environment of the SRIO or PCIE boot:
        e) Slave's RCW should configure the SerDes for SRIO or PCIE boot port, set
           the boot location to SRIO or PCIE, and holdoff all the cores.
 
-       ----------        -----------             -----------
-       |                 |       |         |             |         |
-       |                 |       |         |             |         |
+       -----------       -----------             -----------
+       |         |       |         |             |         |
+       |         |       |         |             |         |
        | NorFlash|<----->| Master  |SRIO or PCIE |  Slave  |<---->[EEPROM]
-       |                 |       |         |<===========>|         |
-       |                 |       |         |             |         |
-       ----------        -----------             -----------
+       |         |       |         |<===========>|         |
+       |         |       |         |             |         |
+       -----------       -----------             -----------
 
 The example based on P4080DS platform:
        Two P4080DS platforms can be used to implement the boot from SRIO or PCIE.
@@ -87,26 +87,32 @@ How to use this feature:
           Please refer to the examples given above.
 
        2. U-Boot image's compilation.
-               For master, U-Boot image should be generated normally.
+          For master, U-Boot image should be generated normally.
 
-               For example, master U-Boot image used on P4080DS should be compiled with
+          For example, master U-Boot image used on P4080DS should be compiled with
 
                                make P4080DS_config.
 
-               For slave, U-Boot image should be generated specifically by
+          For slave, U-Boot image should be generated specifically by
 
                                make xxxx_SRIO_PCIE_BOOT_config.
 
-               For example, slave U-Boot image used on P4080DS should be compiled with
+          For example, slave U-Boot image used on P4080DS should be compiled with
 
                                make P4080DS_SRIO_PCIE_BOOT_config.
 
        3. Necessary modifications based on a specific environment.
-               For a specific environment, the addresses of the slave's U-Boot image,
-               UCode, ENV stored in master's NorFlash, and any other configurations
-               can be modified in the file:
-                                       include/configs/corenet_ds.h.
+          For a specific environment, the addresses of the slave's U-Boot image,
+          UCode, ENV stored in master's NorFlash, and any other configurations
+          can be modified in the file:
+                               include/configs/corenet_ds.h.
 
        4. Set and save the environment variable "bootmaster" with "SRIO1", "SRIO2"
           or "PCIE1", "PCIE2", "PCIE3" for master, and then restart it in order to
           perform the role as a master for boot from SRIO or PCIE.
+
+NOTE: When the Slave's ENV parameters are stored in Master's NorFlash,
+      it can fetch them through PCIE or SRIO interface. But the ENV
+      parameters can not be modified by "saveenv" or other commands under
+      the Slave's u-boot environment, because the Slave can not erase,
+      write Master's NorFlash by PCIE or SRIO link.