Hi York,
On 7 August 2015 at 14:48, York Sun yorksun@freescale.com wrote:
Simon,
I was doing an experiment to put the load address and entry address of Linux to higher than 32-bit address. I found it is broken to process more than 32-bit addresses. When I attempted to fix it, I was troubled by those code used for both host and target, like common/image-fit.c. For example, to process 64-bit address, the function
int fit_image_get_load(const void *fit, int noffset, ulong *load)
should be converted to
int fit_image_get_load(const void *fit, int noffset, uint64_t *load)
ulong is 64-bit for 64-bit target such as ARMv8, but it can be 32-bit on host. If I use uint64_t, all related code in bootm and others need to change. Before I go too far, I'd like to check if anyone has tried to enable this in FIT image.
#address-cells = <2>;
I can try to use uint64_t in place of ulong for all related code if that's right. That will be a lot of change.
Perhaps I misunderstand something, but I think ulong should be OK on the host. I just needs to hold a machine address. On a 32-bit host this cannot be 64-bit. Can you explain the problem a bit more?
I have not need #address-cells in a FIT.
It would be better to use ulong for addresses in U-Boot I think. It is safe and efficient on both 32- and 64-bit machines.
Regards, Simon