[RFC PATCH v2 2/3] platform: generic: renesas: rzfive: Configure the PMA region

[Lad Prabhakar]

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 at 58000000 {
                compatible = "shared-dma-pool";
                reg = <0x0 0x58000000 0x0 0x08000000>;
                no-map;
                linux,dma-default;
            };
        };

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj at bp.renesas.com>
---
 platform/generic/Kconfig                 |  1 +
 platform/generic/renesas/rzfive/rzfive.c | 21 +++++++++++++++++++++
 2 files changed, 22 insertions(+)

diff --git a/platform/generic/Kconfig b/platform/generic/Kconfig
index c6bbe8f..f65b17f 100644
--- a/platform/generic/Kconfig
+++ b/platform/generic/Kconfig
@@ -34,6 +34,7 @@ config PLATFORM_ANDES_AE350
 
 config PLATFORM_RENESAS_RZFIVE
 	bool "Renesas RZ/Five support"
+	select ANDES45_PMA
 	default n
 
 config PLATFORM_SIFIVE_FU540
diff --git a/platform/generic/renesas/rzfive/rzfive.c b/platform/generic/renesas/rzfive/rzfive.c
index 76f2d3a..54a4c29 100644
--- a/platform/generic/renesas/rzfive/rzfive.c
+++ b/platform/generic/renesas/rzfive/rzfive.c
@@ -4,10 +4,30 @@
  *
  */
 
+#include <andes45-pma.h>
 #include <platform_override.h>
 #include <sbi/sbi_domain.h>
 #include <sbi_utils/fdt/fdt_helper.h>
 
+static const struct andes45_pma_region renesas_rzfive_pma_regions[] = {
+	{
+		.pa = 0x58000000,
+		.size = 0x8000000,
+		.flags = ANDES45_PMACFG_ETYP_NAPOT |
+			 ANDES45_PMACFG_MTYP_MEM_NON_CACHE_BUF,
+		.dt_populate = true,
+		.shared_dma = true,
+		.no_map = true,
+		.dma_default = true,
+	},
+};
+
+static int renesas_rzfive_final_init(bool cold_boot, const struct fdt_match *match)
+{
+	return andes45_pma_setup_regions(renesas_rzfive_pma_regions,
+					 array_size(renesas_rzfive_pma_regions));
+}
+
 int renesas_rzfive_early_init(bool cold_boot, const struct fdt_match *match)
 {
 	/*
@@ -32,4 +52,5 @@ static const struct fdt_match renesas_rzfive_match[] = {
 const struct platform_override renesas_rzfive = {
 	.match_table = renesas_rzfive_match,
 	.early_init = renesas_rzfive_early_init,
+	.final_init = renesas_rzfive_final_init,
 };
-- 
2.17.1