[uU PATCH 1/1] am57xx: restore bootm_size for ARMv7 HighMem constraint

[Moteen Shah]

Please ignore this patch, I will send a v2, with the right subject, 
sorry for the inconvenience.

Regards,
Moteen

On 20/05/26 14:00, Moteen Shah wrote:
> babae80169d removed bootm_size from ti_common.env to allow K3 boards
> to process images larger than 256MB, but preserved it in
> ti_armv7_keystone2.env for ARMv7 Keystone2 boards. AM57xx (also ARMv7)
> was not covered by that preservation.
>
> Without bootm_size, env_get_bootm_size() falls back to gd->ram_size,
> causing initrd_high to be computed as the top of all RAM. On ARM32
> boards with more RAM than the DMA zone (e.g. AM572x IDK with 2GiB),
> this places the ramdisk above 0xafe00000 (HighMem), which is not
> directly accessible by the kernel after MMU setup, causing a silent
> crash.
>
> With bootm_size=0x10000000, initrd_high is constrained to
> 0x80000000 + 0x10000000 = 0x90000000, keeping the ramdisk in the
> DMA zone and allowing the kernel to access it correctly.
>
> Fixes: babae80169d ("include: env: ti_common: remove bootm_size")
>
> Signed-off-by: Moteen Shah <m-shah at ti.com>
> ---
> Logs: https://gist.github.com/Jamm02/4dc37a837eded0490d7f16b457807dc3
>
>   board/ti/am57xx/am57xx.env | 1 +
>   1 file changed, 1 insertion(+)
>
> diff --git a/board/ti/am57xx/am57xx.env b/board/ti/am57xx/am57xx.env
> index a7cbbced099..74659279484 100644
> --- a/board/ti/am57xx/am57xx.env
> +++ b/board/ti/am57xx/am57xx.env
> @@ -1,6 +1,7 @@
>   #include <env/ti/ti_common.env>
>   #include <env/ti/mmc.env>
>   #include <env/ti/dfu.env>
> +bootm_size=0x10000000
>   
>   bootpart=0:2
>   bootdir=/boot