opensbi.git/platform/generic/renesas, branch v1.3

platform: generic: andes/renesas: Add SBI EXT to check for enabling IOCP errata

2023-04-14T12:05:04Z

I/O Coherence Port (IOCP) provides an AXI interface for connecting external non-caching masters, such as DMA controllers. The accesses from IOCP are coherent with D-Caches and L2 Cache. IOCP is a specification option and is disabled on the Renesas RZ/Five SoC (which is based on Andes AX45MP core) due to this reason IP blocks using DMA will fail. As a workaround for SoCs with IOCP disabled CMO needs to be handled by software. Firstly OpenSBI configures the memory region as "Memory, Non-cacheable, Bufferable" and passes this region as a global shared dma pool as a DT node. With DMA_GLOBAL_POOL enabled all DMA allocations happen from this region and synchronization callbacks are implemented to synchronize when doing DMA transactions. SBI_EXT_ANDES_IOCP_SW_WORKAROUND checks if the IOCP errata should be applied to handle cache management. Signed-off-by: Lad Prabhakar Reviewed-by: Anup Patel Reviewed-by: Conor Dooley Reviewed-by: Yu Chien Peter Lin

platform: generic: renesas: rzfive: Configure the PMA region

2023-02-27T06:06:06Z

On the Renesas RZ/Five SoC by default we want to configure 128MiB of memory ranging from 0x58000000 as a non-cacheable + bufferable region in the PMA and populate this region as PMA reserve DT node with shared DMA pool and no-map flags set so that Linux drivers requesting any DMA'able memory go through this region. PMA node passed to the above stack: reserved-memory { #address-cells = <2>; #size-cells = <2>; ranges; pma_resv0@58000000 { compatible = "shared-dma-pool"; reg = <0x0 0x58000000 0x0 0x08000000>; no-map; linux,dma-default; }; }; Signed-off-by: Lad Prabhakar Reviewed-by: Yu Chien Peter Lin Reviewed-by: Anup Patel

platform: renesas/rzfive: Configure Local memory regions as part of root domain

2023-01-23T05:59:03Z

Renesas RZ/Five RISC-V SoC has Instruction local memory and Data local memory (ILM & DLM) mapped between region 0x30000 - 0x4FFFF. When a virtual address falls within this range, the MMU doesn't trigger a page fault; it assumes the virtual address is a physical address which can cause undesired behaviours for statically linked applications/libraries. To avoid this, add the ILM/DLM memory regions to the root domain region of the PMPU with permissions set to 0x0 for S/U modes so that any access to these regions gets blocked and for M-mode we grant full access (R/W/X). Signed-off-by: Lad Prabhakar Reviewed-by: Anup Patel

platform: generic: Add Renesas RZ/Five initial support

2022-12-12T13:20:56Z

This commit provides basic support for the Renesas RZ/Five (R9A07G043F) SoC. The RZ/Five microprocessor includes a single RISC-V CPU Core (Andes AX45MP) 1.0 GHz, 16-bit DDR3L/DDR4 interface. Supported interfaces include: - Gigabit Ethernet 2ch - CAN interface (CAN-FD) 2ch - USB 2.0 interface 2ch - SD interface 2ch - AD converter 2ch Useful links: ------------- Links: https://www.renesas.com/us/en/products/microcontrollers-microprocessors/rz-mpus/rzfive-risc-v-general-purpose-microprocessors-risc-v-cpu-core-andes-ax45mp-single-10-ghz-2ch-gigabit-ethernet Links: http://www.andestech.com/en/products-solutions/andescore-processors/riscv-ax45mp/ Signed-off-by: Lad Prabhakar Reviewed-by: Anup Patel