[U-Boot] [PATCH v3 7/8] ARM: mx6: Change the FDT loading address to avoid overlaping

[Stefano Babic <sbabic@denx.de>]

Hi Otavio,

On 16/12/2013 23:44, Otavio Salvador wrote:
> This patch fixes allow for the DeviceTree and initrd relocation fixing
> the boot of FSL 3.10.9-1.0.0-alpha kernel.
> 
> This changes following boards:
> 
>  - mx6sabreauto
>  - mx6sabresd
>  - wandboard
>  - udoo
>  - nitrogen6x
>  - cgtqmx6eval
> 
> The reasoning, as explained by Hui Liu, is:
> 
> ,----
> | The FDT blob will be placed at DDR physical addr: 0x11000000. When Linux kernel
> | Boot up, it will decompress the compressed kernel image and place the decompressed
> | kernel image at the low end of the DDR memory and start running from it. If the
> | decompressed kernel image is bigger for example than 16M, it may over written the
> | fdt blob which u-boot loaded to the DDR memory @0x11000000 with fdt_addr=0x11000000
> |
> | To expand the fdt_addr from 0x11000000 to 0x18000000, which can avoid the override
> | Since we will not likely have one kernel image larger than 128MB.
> `----
> 
> Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
> ---
> Changes in v3: None
> Changes in v2:
> - Change loadaddr to allow use with more than 1G of RAM
> 
>  include/configs/cgtqmx6eval.h     | 2 +-
>  include/configs/mx6sabre_common.h | 2 +-
>  include/configs/nitrogen6x.h      | 2 +-
>  include/configs/udoo.h            | 2 +-
>  include/configs/wandboard.h       | 2 +-
>  5 files changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/include/configs/cgtqmx6eval.h b/include/configs/cgtqmx6eval.h
> index d5db8f5..29a023c 100644
> --- a/include/configs/cgtqmx6eval.h
> +++ b/include/configs/cgtqmx6eval.h
> @@ -81,7 +81,7 @@
>  	"console=ttymxc1\0" \
>  	"fdt_high=0xffffffff\0" \
>  	"initrd_high=0xffffffff\0" \
> -	"fdt_addr=0x11000000\0" \
> +	"fdt_addr=0x18000000\0" \
>  	"boot_fdt=try\0" \
>  	"mmcdev=1\0" \
>  	"mmcpart=1\0" \
> diff --git a/include/configs/mx6sabre_common.h b/include/configs/mx6sabre_common.h
> index a214324..d6ebf83 100644
> --- a/include/configs/mx6sabre_common.h
> +++ b/include/configs/mx6sabre_common.h
> @@ -116,7 +116,7 @@
>  	"script=boot.scr\0" \
>  	"uimage=uImage\0" \
>  	"fdt_file=" CONFIG_DEFAULT_FDT_FILE "\0" \
> -	"fdt_addr=0x11000000\0" \
> +	"fdt_addr=0x18000000\0" \
>  	"boot_fdt=try\0" \
>  	"ip_dyn=yes\0" \
>  	"console=" CONFIG_CONSOLE_DEV "\0" \
> diff --git a/include/configs/nitrogen6x.h b/include/configs/nitrogen6x.h
> index 957dabe..41a6d71 100644
> --- a/include/configs/nitrogen6x.h
> +++ b/include/configs/nitrogen6x.h
> @@ -179,7 +179,7 @@
>  	"fdt_high=0xffffffff\0" \
>  	"initrd_high=0xffffffff\0" \
>  	"fdt_file=imx6q-sabrelite.dtb\0" \
> -	"fdt_addr=0x11000000\0" \
> +	"fdt_addr=0x18000000\0" \
>  	"boot_fdt=try\0" \
>  	"ip_dyn=yes\0" \
>  	"mmcdev=0\0" \
> diff --git a/include/configs/udoo.h b/include/configs/udoo.h
> index b9a493c..c187361 100644
> --- a/include/configs/udoo.h
> +++ b/include/configs/udoo.h
> @@ -93,7 +93,7 @@
>  	"fdt_high=0xffffffff\0" \
>  	"initrd_high=0xffffffff\0" \
>  	"fdt_file=" CONFIG_DEFAULT_FDT_FILE "\0" \
> -	"fdt_addr=0x11000000\0" \
> +	"fdt_addr=0x18000000\0" \
>  	"boot_fdt=try\0" \
>  	"ip_dyn=yes\0" \
>  	"mmcdev=0\0" \
> diff --git a/include/configs/wandboard.h b/include/configs/wandboard.h
> index 85f3c16..5252705 100644
> --- a/include/configs/wandboard.h
> +++ b/include/configs/wandboard.h
> @@ -120,7 +120,7 @@
>  	"fdt_high=0xffffffff\0" \
>  	"initrd_high=0xffffffff\0" \
>  	"fdt_file=" CONFIG_DEFAULT_FDT_FILE "\0" \
> -	"fdt_addr=0x11000000\0" \
> +	"fdt_addr=0x18000000\0" \
>  	"boot_fdt=try\0" \
>  	"ip_dyn=yes\0" \
>  	"mmcdev=" __stringify(CONFIG_SYS_MMC_ENV_DEV) "\0" \
> 

We discussed in a previous thread why this is the preferred solution,
instead of simply dropping fdt_addr as we initially thought - see Tom's
remark in the thread.

Acked-by: Stefano Babic <sbabic@denx.de>

Best regards,
Stefano Babic

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