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