| Message ID | 20210616163821.20457-3-a-govindraju@ti.com |
|---|---|
| State | Accepted |
| Commit | 776e25788c744fe91f7e720331a17ad0ff050480 |
| Delegated to: | Lokesh Vutla |
| Headers | show |
| Series | AM64: Update the locations of various elements in SRAM | expand |
On 6/16/21 11:38 AM, 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> Acked-by: Suman Anna <s-anna@ti.com> You may actually want to reorder so that this patch is first. regards Suman > --- > arch/arm/dts/k3-am64-main.dtsi | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/arch/arm/dts/k3-am64-main.dtsi b/arch/arm/dts/k3-am64-main.dtsi > index f68b969a2e9b..c5af2ffb8ee1 100644 > --- a/arch/arm/dts/k3-am64-main.dtsi > +++ b/arch/arm/dts/k3-am64-main.dtsi > @@ -16,6 +16,14 @@ > tfa-sram@1c0000 { > reg = <0x1c0000 0x20000>; > }; > + > + dmsc-sram@1e0000 { > + reg = <0x1e0000 0x1c000>; > + }; > + > + sproxy-sram@1fc000 { > + reg = <0x1fc000 0x4000>; > + }; > }; > > gic500: interrupt-controller@1800000 { >
Hi Suman, On 16/06/21 10:49 pm, Suman Anna wrote: > On 6/16/21 11:38 AM, 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> > > Acked-by: Suman Anna <s-anna@ti.com> > > You may actually want to reorder so that this patch is first. > Thank you for the Acked-by. The reason why I chose this order is that patch 1, is a fixes patch and that has to apply cleanly on top of previous commit. Thanks, Aswath > regards > Suman > >> --- >> arch/arm/dts/k3-am64-main.dtsi | 8 ++++++++ >> 1 file changed, 8 insertions(+) >> >> diff --git a/arch/arm/dts/k3-am64-main.dtsi b/arch/arm/dts/k3-am64-main.dtsi >> index f68b969a2e9b..c5af2ffb8ee1 100644 >> --- a/arch/arm/dts/k3-am64-main.dtsi >> +++ b/arch/arm/dts/k3-am64-main.dtsi >> @@ -16,6 +16,14 @@ >> tfa-sram@1c0000 { >> reg = <0x1c0000 0x20000>; >> }; >> + >> + dmsc-sram@1e0000 { >> + reg = <0x1e0000 0x1c000>; >> + }; >> + >> + sproxy-sram@1fc000 { >> + reg = <0x1fc000 0x4000>; >> + }; >> }; >> >> gic500: interrupt-controller@1800000 { >> >
diff --git a/arch/arm/dts/k3-am64-main.dtsi b/arch/arm/dts/k3-am64-main.dtsi index f68b969a2e9b..c5af2ffb8ee1 100644 --- a/arch/arm/dts/k3-am64-main.dtsi +++ b/arch/arm/dts/k3-am64-main.dtsi @@ -16,6 +16,14 @@ tfa-sram@1c0000 { reg = <0x1c0000 0x20000>; }; + + dmsc-sram@1e0000 { + reg = <0x1e0000 0x1c000>; + }; + + sproxy-sram@1fc000 { + reg = <0x1fc000 0x4000>; + }; }; gic500: interrupt-controller@1800000 {
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/arm/dts/k3-am64-main.dtsi | 8 ++++++++ 1 file changed, 8 insertions(+)