@@ -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.
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> --- doc/README.srio-pcie-boot-corenet | 34 ++++++++++++++++++++-------------- 1 files changed, 20 insertions(+), 14 deletions(-)