UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

arm64: dts: ti: k3-am654-base-board: Add DDR carveout memory nodes for R5Fs 

The R5F processors do not have an MMU, and as such require the exact memory
used by the firmwares to be set-aside. Four carveout reserved memory nodes
have been added with two each (1 MB and 15 MB in size) used for each of the
MCU R5F remote processor devices on all the TI K3 AM65x boards. These nodes
are assigned to the respective rproc device nodes as well.

The current carveout addresses and sizes are defined statically for each
device. The first region will be used as the DMA pool for the rproc
device, and the second region will furnish the static carveout regions
for the firmware memory.

Note that the R5F1 carveouts are needed only if the corresponding R5F
cluster is running in Split (non-LockStep) mode. The corresponding
reserved memory nodes can be disabled later on if there is no use-case
defined to use the corresponding remote processor.

Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com>
Link: https://lore.kernel.org/r/20201029033802.15366-4-s-anna@ti.com
This commit is contained in:
Suman Anna 2020-10-28 22:37:57 -05:00 committed by Nishanth Menon
parent 10332cd6bc
commit 954ec5139d
1 changed files with 29 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
arch/arm64/boot/dts/ti/k3-am654-base-board.dts
View File

@ -29,11 +29,36 @@
#address-cells = <2>;
#size-cells = <2>;
ranges;
secure_ddr: secure-ddr@9e800000 {
reg = <0 0x9e800000 0 0x01800000>; /* for OP-TEE */
alignment = <0x1000>;
no-map;
};
mcu_r5fss0_core0_dma_memory_region: r5f-dma-memory@a0000000 {
compatible = "shared-dma-pool";
reg = <0 0xa0000000 0 0x100000>;
no-map;
};
mcu_r5fss0_core0_memory_region: r5f-memory@a0100000 {
compatible = "shared-dma-pool";
reg = <0 0xa0100000 0 0xf00000>;
no-map;
};
mcu_r5fss0_core1_dma_memory_region: r5f-dma-memory@a1000000 {
compatible = "shared-dma-pool";
reg = <0 0xa1000000 0 0x100000>;
no-map;
};
mcu_r5fss0_core1_memory_region: r5f-memory@a1100000 {
compatible = "shared-dma-pool";
reg = <0 0xa1100000 0 0xf00000>;
no-map;
};
};
gpio-keys {
@ -442,10 +467,14 @@
};
&mcu_r5fss0_core0 {
memory-region = <&mcu_r5fss0_core0_dma_memory_region>,
<&mcu_r5fss0_core0_memory_region>;
mboxes = <&mailbox0_cluster0 &mbox_mcu_r5fss0_core0>;
};
&mcu_r5fss0_core1 {
memory-region = <&mcu_r5fss0_core1_dma_memory_region>,
<&mcu_r5fss0_core1_memory_region>;
mboxes = <&mailbox0_cluster1 &mbox_mcu_r5fss0_core1>;
};