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

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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 <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Yu Chien Peter Lin <peterlin@andestech.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Lad Prabhakar
2023-02-13 21:51:10 +00:00
committed by Anup Patel
parent c10095132a
commit 2491242282
2 changed files with 22 additions and 0 deletions
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platform/generic/Kconfig
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@@ -35,6 +35,7 @@ config PLATFORM_ANDES_AE350
config PLATFORM_RENESAS_RZFIVE
bool "Renesas RZ/Five support"
select ANDES45_PMA
default n
config PLATFORM_SIFIVE_FU540