[RFC PATCH v3 2/3] platform: generic: renesas: rzfive: Configure the PMA region
Lad Prabhakar
prabhakar.mahadev-lad.rj at bp.renesas.com
Thu Jan 26 01:58:31 PST 2023
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 9ee9fe3..bc5c280 100644
--- a/platform/generic/Kconfig
+++ b/platform/generic/Kconfig
@@ -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
diff --git a/platform/generic/renesas/rzfive/rzfive.c b/platform/generic/renesas/rzfive/rzfive.c
index ee9c9c4..0a8c9f9 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)
{
/*
@@ -34,4 +54,5 @@ 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
More information about the opensbi
mailing list