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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>
This commit is contained in:
Liu Gang 2013-05-07 16:30:45 +08:00 committed by Andy Fleming
parent f64bd7c038
commit 5a516748a8
1 changed files with 20 additions and 14 deletions
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34
doc/README.srio-pcie-boot-corenet
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@ -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.