[U-Boot] [PATCH 3/5] pico-imx7d: Reserve region of memory to OPTEE

[Jun Nie]

Subtracts CONFIG_OPTEE_TZDRAM_SIZE from the available DRAM size so that
the OPTEE memory is not override during u-boot relocation.

Note the OPTEE boot process will itself subtract the DRAM region it lives
in from the memory map passed to Linux.

Signed-off-by: Jun Nie <jun.nie at linaro.org>
---
 board/technexion/pico-imx7d/pico-imx7d.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/board/technexion/pico-imx7d/pico-imx7d.c b/board/technexion/pico-imx7d/pico-imx7d.c
index 53e1469..7c9e145 100644
--- a/board/technexion/pico-imx7d/pico-imx7d.c
+++ b/board/technexion/pico-imx7d/pico-imx7d.c
@@ -60,6 +60,11 @@ int dram_init(void)
 {
 	gd->ram_size = imx_ddr_size();
 
+	/* Subtract the defined OPTEE runtime firmware length */
+#ifdef CONFIG_OPTEE_TZDRAM_SIZE
+		gd->ram_size -= CONFIG_OPTEE_TZDRAM_SIZE;
+#endif
+
 	return 0;
 }
 
-- 
2.7.4