| Message ID | 20210615174325.22853-3-a-govindraju@ti.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | AM64: Update the locations of various elements in SRAM | expand |
On 6/15/21 12:43 PM, Aswath Govindraju wrote: > The final 128KB in SRAM is reserved by default for DMSC-lite code and > secure proxy communication buffer. The memory region used for DMSC-lite > code can be optionally freed up by secure firmware API[1]. However, the > buffer for secure proxy communication is not configurable. This default > hardware configuration is unique for AM64. > > Therefore, indicate the area reserved for DMSC-lite code and secure proxy > communication buffer in the oc_sram device tree node. > > [1] - http://downloads.ti.com/tisci/esd/latest/6_topic_user_guides/security_handover.html#triggering-security-handover > > Signed-off-by: Aswath Govindraju <a-govindraju@ti.com> Reviewed-by: Suman Anna <s-anna@ti.com> > --- > arch/arm64/boot/dts/ti/k3-am64-main.dtsi | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/arch/arm64/boot/dts/ti/k3-am64-main.dtsi b/arch/arm64/boot/dts/ti/k3-am64-main.dtsi > index 693fe24e7f7a..6a883f4349cb 100644 > --- a/arch/arm64/boot/dts/ti/k3-am64-main.dtsi > +++ b/arch/arm64/boot/dts/ti/k3-am64-main.dtsi > @@ -27,6 +27,14 @@ > tfa-sram@0 { > reg = <0x0 0x1c000>; > }; > + > + dmsc-sram@1e0000 { > + reg = <0x1e0000 0x1c000>; > + }; > + > + sproxy-sram@1fc000 { > + reg = <0x1fc000 0x4000>; > + }; > }; > > main_conf: syscon@43000000 { >
diff --git a/arch/arm64/boot/dts/ti/k3-am64-main.dtsi b/arch/arm64/boot/dts/ti/k3-am64-main.dtsi index 693fe24e7f7a..6a883f4349cb 100644 --- a/arch/arm64/boot/dts/ti/k3-am64-main.dtsi +++ b/arch/arm64/boot/dts/ti/k3-am64-main.dtsi @@ -27,6 +27,14 @@ tfa-sram@0 { reg = <0x0 0x1c000>; }; + + dmsc-sram@1e0000 { + reg = <0x1e0000 0x1c000>; + }; + + sproxy-sram@1fc000 { + reg = <0x1fc000 0x4000>; + }; }; main_conf: syscon@43000000 {
The final 128KB in SRAM is reserved by default for DMSC-lite code and secure proxy communication buffer. The memory region used for DMSC-lite code can be optionally freed up by secure firmware API[1]. However, the buffer for secure proxy communication is not configurable. This default hardware configuration is unique for AM64. Therefore, indicate the area reserved for DMSC-lite code and secure proxy communication buffer in the oc_sram device tree node. [1] - http://downloads.ti.com/tisci/esd/latest/6_topic_user_guides/security_handover.html#triggering-security-handover Signed-off-by: Aswath Govindraju <a-govindraju@ti.com> --- arch/arm64/boot/dts/ti/k3-am64-main.dtsi | 8 ++++++++ 1 file changed, 8 insertions(+)