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https://github.com/brain-hackers/u-boot-brain
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55f8eb3169
The J721E SoCs have 3 dual-core Arm Cortex-R5F processor (R5FSS) subsystems/clusters. One R5F cluster (MCU_R5FSS0) is present within the MCU domain, and the remaining two clusters are present in the MAIN domain (MAIN_R5FSS0 & MAIN_R5FSS1). Each of these 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. These subsystems have 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 nodes for these two MAIN domain R5F cluster/subsystems, the two R5 cores are each added as child nodes to the corresponding main cluster node. Configure SS0 in split mode an SS1 in lockstep mode, with the ATCMs enabled to allow the R5 cores to execute code from DDR with boot-strapping code from ATCM. Signed-off-by: Suman Anna <s-anna@ti.com> Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
73 lines
1.2 KiB
Plaintext
73 lines
1.2 KiB
Plaintext
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/
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*/
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/dts-v1/;
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#include "k3-j721e-som-p0.dtsi"
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/ {
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chosen {
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stdout-path = "serial2:115200n8";
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bootargs = "console=ttyS2,115200n8 earlycon=ns16550a,mmio32,0x02800000";
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};
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aliases {
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remoteproc0 = &mcu_r5fss0_core0;
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remoteproc1 = &mcu_r5fss0_core1;
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remoteproc2 = &main_r5fss0_core0;
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remoteproc3 = &main_r5fss0_core1;
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remoteproc4 = &main_r5fss1_core0;
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remoteproc5 = &main_r5fss1_core1;
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};
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};
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&wkup_uart0 {
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/* Wakeup UART is used by System firmware */
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status = "disabled";
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};
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&main_uart3 {
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/* UART not brought out */
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status = "disabled";
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};
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&main_uart5 {
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/* UART not brought out */
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status = "disabled";
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};
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&main_uart6 {
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/* UART not brought out */
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status = "disabled";
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};
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&main_uart7 {
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/* UART not brought out */
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status = "disabled";
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};
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&main_uart8 {
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/* UART not brought out */
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status = "disabled";
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};
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&main_uart9 {
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/* UART not brought out */
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status = "disabled";
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};
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&main_sdhci0 {
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/* eMMC */
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voltage-ranges = <1800 1800>;
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non-removable;
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ti,driver-strength-ohm = <50>;
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};
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&main_sdhci1 {
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/* SD/MMC */
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voltage-ranges = <1800 1800 3300 3300>;
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ti,driver-strength-ohm = <50>;
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};
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