[U-Boot] [PATCH 3/7] colibri_imx7/colibri_imx6/apalis_imx6: limit bootm memory

[Stefan Agner]

From: Stefan Agner <stefan.agner at toradex.com>

Limit memory used for relocation of FDT or initrd. This is
required to make sure that relocated artifacts are within lowmem.
If fdt_high or initrd_high are not set, U-Boot automatically
relocates artifacts to the end of memory. But this area won't
be part of lowmem and hence will not be accessible by the kernel
during early boot.

With VM split set to 2G/2G (i.MX default), only the 2GB Apalis
iMX6 is affected by that issue. With VM split set to 3G/1G (ARM
default) also modules with 1GB of memory are affected. With the
latter the amount of lowmem will be 760MiB.

The value must also not exceed available memory! Use a safe value
of 512MiB for Apalis and 256MiB for Colibri.

Signed-off-by: Stefan Agner <stefan.agner at toradex.com>
Acked-by: Marcel Ziswiler <marcel.ziswiler at toradex.com>
---

 include/configs/apalis_imx6.h  | 1 +
 include/configs/colibri_imx6.h | 1 +
 include/configs/colibri_imx7.h | 1 +
 3 files changed, 3 insertions(+)

diff --git a/include/configs/apalis_imx6.h b/include/configs/apalis_imx6.h
index 9c899e40b0..c5db7f2b6b 100644
--- a/include/configs/apalis_imx6.h
+++ b/include/configs/apalis_imx6.h
@@ -197,6 +197,7 @@
 		"${fdt_file} && setenv dtbparam \" - ${fdt_addr_r}\" && true\0"
 
 #define MEM_LAYOUT_ENV_SETTINGS \
+	"bootm_size=0x20000000\0" \
 	"fdt_addr_r=0x12000000\0" \
 	"fdt_high=0xffffffff\0" \
 	"initrd_high=0xffffffff\0" \
diff --git a/include/configs/colibri_imx6.h b/include/configs/colibri_imx6.h
index 2fbadf2522..924b40fea5 100644
--- a/include/configs/colibri_imx6.h
+++ b/include/configs/colibri_imx6.h
@@ -172,6 +172,7 @@
 		"${fdt_file} && setenv dtbparam \" - ${fdt_addr_r}\" && true\0"
 
 #define MEM_LAYOUT_ENV_SETTINGS \
+	"bootm_size=0x10000000\0" \
 	"fdt_addr_r=0x12000000\0" \
 	"fdt_high=0xffffffff\0" \
 	"initrd_high=0xffffffff\0" \
diff --git a/include/configs/colibri_imx7.h b/include/configs/colibri_imx7.h
index 3da4211e9b..80eeae46c2 100644
--- a/include/configs/colibri_imx7.h
+++ b/include/configs/colibri_imx7.h
@@ -61,6 +61,7 @@
 #define CONFIG_SERVERIP			192.168.10.1
 
 #define MEM_LAYOUT_ENV_SETTINGS \
+	"bootm_size=0x10000000\0" \
 	"fdt_addr_r=0x82000000\0" \
 	"fdt_high=0xffffffff\0" \
 	"initrd_high=0xffffffff\0" \
-- 
2.12.0