From 2a3f161c8b16ed4fe4bd215dddfa21f4ddbd3e37 Mon Sep 17 00:00:00 2001
From: Patrick Delaunay <patrick.delaunay@foss.st.com>
Date: Tue, 16 Mar 2021 09:29:40 +0100
Subject: [PATCH] scmi: correctly configure MMU for SCMI buffer
Align the MMU area for SCMI shared buffer on section size;
use the ALIGN macro in mmu_set_region_dcache_behaviour call.
Since commit d877f8fd0f09 ("arm: provide a function for boards init
code to modify MMU virtual-physical map") the parameter of
mmu_set_region_dcache_behaviour need to be MMU_SECTION_SIZE
aligned.
Fixes: 240720e9052f ("firmware: scmi: mailbox/smt agent device")
Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Etienne Carriere <etienne.carriere@linaro.org>
---
drivers/firmware/scmi/smt.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/firmware/scmi/smt.c b/drivers/firmware/scmi/smt.c
index 60b9d499b7..4954355c1a 100644
--- a/drivers/firmware/scmi/smt.c
+++ b/drivers/firmware/scmi/smt.c
@@ -56,8 +56,10 @@ int scmi_dt_get_smt_buffer(struct udevice *dev, struct scmi_smt *smt)
#ifdef CONFIG_ARM
if (dcache_status())
- mmu_set_region_dcache_behaviour((uintptr_t)smt->buf,
- smt->size, DCACHE_OFF);
+ mmu_set_region_dcache_behaviour(ALIGN_DOWN((uintptr_t)smt->buf, MMU_SECTION_SIZE),
+ ALIGN(smt->size, MMU_SECTION_SIZE),
+ DCACHE_OFF);
+
#endif
return 0;
--
2.39.5