[PATCH v2] board: ea: mx7ulp_com: allocate specific region of memory to OP-TEE

[Oleksandr Suvorov]

From: Ricardo Salveti <ricardo at foundries.io>

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 at foundries.io>
Signed-off-by: Oleksandr Suvorov <oleksandr.suvorov at foundries.io>
Reviewed-by: Fabio Estevam <festevam at gmail.com>
---

Changes in v2:
- add missed Signed-off-by
- add Reviewed-by

 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;
 }
 
-- 
2.31.1