Hi Peng,
On 29/06/2016 13:49, Peng Fan wrote:
Introduce IMX_FIXED_IVT_OFFSET, which means different boot medias use the same IVT offset. To i.MX7, different boot medias' IVT offset is fixed at 0x400. So select IMX_FIXED_IVT_OFFSET for i.MX7D.
It is nice that this discrepancy in the IVT offset is getting rid with new SOCs. Very good idea by Hardware Designs.
However, I do not think it is a great to add a CONFIG_ switch. Reason is that mkimage is a tool, and it can be maybe compiled once and used with several SOCs without rebuilding. If you are using inside a Yocto-build, there is not problem, else...
That means that some diversities should be managed at runtime by mkimage itself, without rebuilding. We have two possibilities for that:
- adding some parameters tro mkimage. Well, this remains often undocumented and the parameter can conflict with other image types. I mention this, but I do not like.
- add this kind of flag to the imximage.cfg file.
There is already a BOOT_OFFSET attribute, see for example board/freescale/vf610twr/imximage.cfg:
#include <asm/imx-common/imximage.cfg>
/* image version */ IMAGE_VERSION 2
/* Boot Offset 0x400, valid for both SD and NAND boot */ BOOT_OFFSET FLASH_OFFSET_STANDARD
asm/imx-common/imximage.cfg contains i.MX6 offsets, but nevertheless, can we used the same way for i.MX7, too ?
Signed-off-by: Peng Fan peng.fan@nxp.com Cc: Stefano Babic sbabic@denx.de
arch/arm/cpu/armv7/mx7/Kconfig | 1 + arch/arm/imx-common/Kconfig | 7 +++++++ 2 files changed, 8 insertions(+)
diff --git a/arch/arm/cpu/armv7/mx7/Kconfig b/arch/arm/cpu/armv7/mx7/Kconfig index ecfa4a2..6e70394 100644 --- a/arch/arm/cpu/armv7/mx7/Kconfig +++ b/arch/arm/cpu/armv7/mx7/Kconfig @@ -7,6 +7,7 @@ config MX7
config MX7D select ROM_UNIFIED_SECTIONS
- select IMX_FIXED_IVT_OFFSET bool
choice diff --git a/arch/arm/imx-common/Kconfig b/arch/arm/imx-common/Kconfig index 1b7da5a..b248ef3 100644 --- a/arch/arm/imx-common/Kconfig +++ b/arch/arm/imx-common/Kconfig @@ -4,6 +4,13 @@ config IMX_CONFIG config ROM_UNIFIED_SECTIONS bool
+config IMX_FIXED_IVT_OFFSET
- bool "The IVT offset for different medias fixed or not"
- help
The IVT offset for different boot medias are fixed or not.To i.MX7, the IVT offset for different boot medias arefixed.config IMX_RDC bool "i.MX Resource domain controller driver" depends on ARCH_MX6 || ARCH_MX7
Best regards, Stefano Babic