On 8/28/2026 7:27 PM, Richard Genoud (TI) wrote:
> From: Prasanth Babu Mantena <[email protected]>
>
> Extend the access to SRAM region of ATF to TIFS as well. This is
> needed for TIFS for encryption and decryption of ATF as a part of
> low power mode sequence. TIFS encrypts the ATF while entering into
> low power mode and decrypts it back while resuming back.
> So, giving permissions for TIFS to access this region.
>
> Signed-off-by: Prasanth Babu Mantena <[email protected]>
> Co-developed-by: Richard Genoud (TI) <[email protected]>
> Signed-off-by: Richard Genoud (TI) <[email protected]>
> ---
> arch/arm/dts/k3-binman.dtsi | 7 ++++++-
> arch/arm/dts/k3-security.h | 1 +
> 2 files changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm/dts/k3-binman.dtsi b/arch/arm/dts/k3-binman.dtsi
> index ad127663d03b..1cf417ed7dcd 100644
> --- a/arch/arm/dts/k3-binman.dtsi
> +++ b/arch/arm/dts/k3-binman.dtsi
> @@ -475,7 +475,12 @@
> FWCTRL_CACHE)>;
> permissions = <((FWPRIVID_ARMV8 << FWPRIVID_SHIFT) |
> FWPERM_SECURE_PRIV_RWCD |
> - FWPERM_SECURE_USER_RWCD)>;
> + FWPERM_SECURE_USER_RWCD)>,
> + <((FWPRIVID_TIFS << FWPRIVID_SHIFT) |
> + FWPERM_SECURE_PRIV_RWCD |
> + FWPERM_SECURE_USER_RWCD |
> + FWPERM_NON_SECURE_PRIV_RWCD |
> + FWPERM_NON_SECURE_USER_RWCD)>;
LGTM, to give TIFS access.
> start_address = <0x0 CONFIG_K3_ATF_LOAD_ADDR>;
> end_address = <0x0 (CONFIG_K3_ATF_LOAD_ADDR +
> CONFIG_K3_ATF_RESERVED_SIZE - 1)>;
> };
> diff --git a/arch/arm/dts/k3-security.h b/arch/arm/dts/k3-security.h
> index 33609caa8fb5..3e066bca6ad7 100644
> --- a/arch/arm/dts/k3-security.h
> +++ b/arch/arm/dts/k3-security.h
> @@ -7,6 +7,7 @@
> #define DTS_ARM64_TI_K3_FIREWALL_H
>
> #define FWPRIVID_ALL 0xc3
> +#define FWPRIVID_TIFS 0xca
> #define FWPRIVID_ARMV8 1
> #define FWPRIVID_SHIFT 16
>
