From cdf31924521b347980a2b4e9871acb4a995f5d24 Mon Sep 17 00:00:00 2001
From: Ricardo Salveti <ricardo@foundries.io>
Date: Wed, 25 Aug 2021 18:47:18 +0300
Subject: [PATCH] board: ea: mx7ulp_com: allocate specific region of memory to
OP-TEE
On the iMX7ULP uCOM board, OP-TEE uses the memory region defined by the
maximum DRAM address minus CONFIG_OPTEE_TZDRAM_SIZE, so subtract
CONFIG_OPTEE_TZDRAM_SIZE from the available DRAM size to avoid
conflicts.
Note the OPTEE boot process itself subtracts the DRAM region it
lives in from the memory map passed to Linux.
Signed-off-by: Ricardo Salveti <ricardo@foundries.io>
Signed-off-by: Oleksandr Suvorov <oleksandr.suvorov@foundries.io>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
---
board/ea/mx7ulp_com/mx7ulp_com.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/board/ea/mx7ulp_com/mx7ulp_com.c b/board/ea/mx7ulp_com/mx7ulp_com.c
index 5b2d444366..7fce75ade9 100644
--- a/board/ea/mx7ulp_com/mx7ulp_com.c
+++ b/board/ea/mx7ulp_com/mx7ulp_com.c
@@ -20,6 +20,10 @@ int dram_init(void)
{
gd->ram_size = imx_ddr_size();
+#ifdef CONFIG_OPTEE_TZDRAM_SIZE
+ gd->ram_size -= CONFIG_OPTEE_TZDRAM_SIZE;
+#endif
+
return 0;
}
--
2.39.5