From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Your Name Date: Mon, 21 Mar 2025 12:00:00 +0000 Subject: [PATCH] Reclaim SRAM3 from OpenAMP for direct memory mapping This patch removes SRAM3 from the OpenAMP memory regions and creates a dedicated memory region for direct mapping through /dev/mem. Signed-off-by: Your Name --- arch/arm/boot/dts/st/stm32mp15xx-dkx.dtsi | 19 +++---------------- 1 file changed, 3 insertions(+), 16 deletions(-) diff --git a/arch/arm/boot/dts/st/stm32mp15xx-dkx.dtsi b/arch/arm/boot/dts/st/stm32mp15xx-dkx.dtsi index xxxxxxx..yyyyyyy 100644 --- a/arch/arm/boot/dts/st/stm32mp15xx-dkx.dtsi +++ b/arch/arm/boot/dts/st/stm32mp15xx-dkx.dtsi @@ -33,21 +33,9 @@ no-map; }; - vdev0vring0: vdev0vring0@10040000 { + custom_shared_mem: custom_shared_mem@10040000 { compatible = "shared-dma-pool"; - reg = <0x10040000 0x1000>; - no-map; - }; - - vdev0vring1: vdev0vring1@10041000 { - compatible = "shared-dma-pool"; - reg = <0x10041000 0x1000>; - no-map; - }; - - vdev0buffer: vdev0buffer@10042000 { - compatible = "shared-dma-pool"; - reg = <0x10042000 0x4000>; + reg = <0x10040000 0x8000>; no-map; }; @@ -532,8 +520,7 @@ }; &m4_rproc { - memory-region = <&retram>, <&mcuram>, <&mcuram2>, <&vdev0vring0>, - <&vdev0vring1>, <&vdev0buffer>, <&mcu_rsc_table>; + memory-region = <&retram>, <&mcuram>, <&mcuram2>, <&mcu_rsc_table>; mboxes = <&ipcc 0>, <&ipcc 1>, <&ipcc 2>, <&ipcc 3>; mbox-names = "vq0", "vq1", "shutdown", "detach"; interrupt-parent = <&exti>;