From: Jun Nie <jun.nie@linaro.org>
Date: Wed, 8 May 2019 06:38:32 +0000 (+0800)
Subject: pico-imx7d: Reserve region of memory to OPTEE
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=1d3b852e52d85d96c9cd4491da3daf42e3aef760;p=project%2Fbcm63xx%2Fu-boot.git

pico-imx7d: Reserve region of memory to OPTEE

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 live in the end part of DRAM and 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@linaro.org>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
---

diff --git a/board/technexion/pico-imx7d/pico-imx7d.c b/board/technexion/pico-imx7d/pico-imx7d.c
index e63b19df6e..5b357f265a 100644
--- a/board/technexion/pico-imx7d/pico-imx7d.c
+++ b/board/technexion/pico-imx7d/pico-imx7d.c
@@ -63,6 +63,11 @@ 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;
 }