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firmware: Add common FW_FDT_PATH compile-time option

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Currently, only FW_PAYLOAD has mechanism to embed external
FDT using FW_PAYLOAD_FDT_PATH compile-time option.

This patch adds a common FW_FDT_PATH compile-time option to
embed external FDT for all OpenSBI firmwares (i.e FW_JUMP,
FW_PAYLOAD, and FW_DYNAMIC).

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
This commit is contained in:
Anup Patel
2020-10-14 16:03:35 +05:30
committed by Anup Patel
parent af4b50f896
commit 6ca096977d
4 changed files with 37 additions and 4 deletions
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14
docs/firmware/fw.md
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@@ -51,11 +51,17 @@ case, a *FW_PAYLOAD* firmware allows embedding a flattened device tree in the
Firmware Configuration and Compilation
--------------------------------------
All firmware types mandate the definition of the following compile time
configuration parameter.
All firmware types support the following common compile time configuration
parameters:
* **FW_TEXT_ADDR** - Defines the address at which the previous booting stage
loads OpenSBI firmware.
* **FW_TEXT_ADDR** - Defines the execution address of the OpenSBI firmware.
This configuration parameter is mandatory.
* **FW_FDT_PATH** - Path to an external flattened device tree binary file to
be embedded in the *.rodata* section of the final firmware. If this option
is not provided then the firmware will expect the FDT to be passed as an
argument by the prior booting stage.
* **FW_FDT_PADDING** - Optional zero bytes padding to the embedded flattened
device tree binary file specified by **FW_FDT_PATH** option.
Additionally, each firmware type as a set of type specific configuration
parameters. Detailed information for each firmware type can be found in the