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| author | Heiko Stuebner <heiko.stuebner@theobroma-systems.com> | 2019-10-23 16:46:40 +0200 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2019-11-14 07:09:34 -0600 |
| commit | 6ccb05eae01b660b0585accf338302af1069f419 (patch) | |
| tree | 19f20b96462bff2528bef0e675bdc8080242ab8f /include/tee/optee.h | |
| parent | 357d2ceba0354e29462ac25924f5e42623c22b5b (diff) | |
image: fdt: copy possible optee nodes to a loaded devicetree
The loading convention for optee or any other tee on arm64 is as bl32
parameter to the trusted-firmware. So TF-A gets invoked with the TEE as
bl32 and main u-boot as bl33. Once it has done its startup TF-A jumps
into the bl32 for the TEE startup, returns to TF-A and then jumps to bl33.
All of them get passed a devicetree as parameter and all components often
get loaded from a FIT image.
OP-TEE will create additional nodes in that devicetree namely a firmware
node and possibly multiple reserved-memory nodes.
While this devicetree is used in main u-boot, in most cases it won't be
the one passed to the actual kernel. Instead most boot commands will load
a new devicetree from somewhere like mass storage of the network, so if
that happens u-boot should transfer the optee nodes to that new devicetree.
To make that happen introduce optee_copy_fdt_nodes() called from the dt
setup function in image-fdt which after checking for the optee presence
in the u-boot dt will make sure a optee node is present in the kernel dt
and transfer any reserved-memory regions it can find.
Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
Diffstat (limited to 'include/tee/optee.h')
| -rw-r--r-- | include/tee/optee.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/tee/optee.h b/include/tee/optee.h index 9446928fd4..121b30a303 100644 --- a/include/tee/optee.h +++ b/include/tee/optee.h @@ -67,4 +67,13 @@ static inline int optee_verify_bootm_image(unsigned long image_addr, } #endif +#if defined(CONFIG_OPTEE) && defined(CONFIG_OF_LIBFDT) +int optee_copy_fdt_nodes(const void *old_blob, void *new_blob); +#else +static inline int optee_copy_fdt_nodes(const void *old_blob, void *new_blob) +{ + return 0; +} +#endif + #endif /* _OPTEE_H */ |