From: Suman Anna s-anna@ti.com
The AM65x SoCs has a single dual-core Arm Cortex-R5F processor subsystem/cluster (MCU_R5FSS0) within the MCU domain. This cluster can be configured at boot time to be either run in a LockStep mode or in an Asymmetric Multi Processing (AMP) fashion in Split-mode. This subsystem has 64 KB each Tightly-Coupled Memory (TCM) internal memories for each core split between two banks - ATCM and BTCM (further interleaved into two banks). There are some IP integration differences from standard Arm R5 clusters such as the absence of an ACP port, presence of an additional TI-specific Region Address Translater (RAT) module for translating 32-bit CPU addresses into larger system bus addresses etc.
Add the DT node for the MCU domain R5F cluster/subsystem, the two R5 cores are added as child nodes to the main cluster/subsystem node. The cluster is configured to run in Split-mode by default, with the ATCMs enabled to allow the R5 cores to execute code from DDR with boot-strapping code from ATCM. The inter-processor communication between the main A72 cores and these processors is achieved through shared memory and Mailboxes.
Signed-off-by: Suman Anna s-anna@ti.com Signed-off-by: Lokesh Vutla lokeshvutla@ti.com --- arch/arm/dts/k3-am65-mcu.dtsi | 40 +++++++++++++++++++++++++++- arch/arm/dts/k3-am654-base-board.dts | 5 ++++ 2 files changed, 44 insertions(+), 1 deletion(-)
diff --git a/arch/arm/dts/k3-am65-mcu.dtsi b/arch/arm/dts/k3-am65-mcu.dtsi index c9bfd9b80f..c42e7553c7 100644 --- a/arch/arm/dts/k3-am65-mcu.dtsi +++ b/arch/arm/dts/k3-am65-mcu.dtsi @@ -2,7 +2,7 @@ /* * Device Tree Source for AM6 SoC Family MCU Domain peripherals * - * Copyright (C) 2016-2018 Texas Instruments Incorporated - http://www.ti.com/ + * Copyright (C) 2016-2019 Texas Instruments Incorporated - http://www.ti.com/ */
&cbass_mcu { @@ -26,4 +26,42 @@ clocks = <&k3_clks 114 1>; power-domains = <&k3_pds 114 TI_SCI_PD_EXCLUSIVE>; }; + + mcu_r5fss0: r5fss@41000000 { + compatible = "ti,am654-r5fss"; + lockstep-mode = <0>; + #address-cells = <1>; + #size-cells = <1>; + ranges = <0x41000000 0x00 0x41000000 0x20000>, + <0x41400000 0x00 0x41400000 0x20000>; + power-domains = <&k3_pds 129 TI_SCI_PD_EXCLUSIVE>; + + mcu_r5fss0_core0: r5f@41000000 { + compatible = "ti,am654-r5f"; + reg = <0x41000000 0x00008000>, + <0x41010000 0x00008000>; + reg-names = "atcm", "btcm"; + ti,sci = <&dmsc>; + ti,sci-dev-id = <159>; + ti,sci-proc-ids = <0x01 0xFF>; + resets = <&k3_reset 159 1>; + atcm-enable = <1>; + btcm-enable = <1>; + loczrama = <1>; + }; + + mcu_r5fss0_core1: r5f@41400000 { + compatible = "ti,am654-r5f"; + reg = <0x41400000 0x00008000>, + <0x41410000 0x00008000>; + reg-names = "atcm", "btcm"; + ti,sci = <&dmsc>; + ti,sci-dev-id = <245>; + ti,sci-proc-ids = <0x02 0xFF>; + resets = <&k3_reset 245 1>; + atcm-enable = <1>; + btcm-enable = <1>; + loczrama = <1>; + }; + }; }; diff --git a/arch/arm/dts/k3-am654-base-board.dts b/arch/arm/dts/k3-am654-base-board.dts index e73b9aa6b1..573ead0b4d 100644 --- a/arch/arm/dts/k3-am654-base-board.dts +++ b/arch/arm/dts/k3-am654-base-board.dts @@ -17,6 +17,11 @@ bootargs = "earlycon=ns16550a,mmio32,0x02800000"; };
+ aliases { + remoteproc0 = &mcu_r5fss0_core0; + remoteproc1 = &mcu_r5fss0_core1; + }; + memory@80000000 { device_type = "memory"; /* 4G RAM */