[PATCH] rpi: limit size of the RAM to the multiple of the MMU_SECTION_SIZE

[Nicolas Saenz Julienne]

On Mon, 2021-02-01 at 12:16 +0100, Marek Szyprowski wrote:
> When RPi4 is booted from USB Mass Storage, the firmware reports 947MiB of
> the ARM memory (948 in case of the standard SD-card boot). This value is
> not MMU_SECTION_SIZE aligned, so the dram_bank_mmu_setup() skips mapping
> of the last 1MiB. This later causes u-boot in ARM 32bit mode to freeze,
> because it relocated itself into that unmapped memory and fails to
> execute.
> 
> Fix this by limiting the size of the first bank to the multiple of
> MMU_SECTION_SIZE.
> 
> Signed-off-by: Marek Szyprowski <m.szyprowski at samsung.com>
> ---

Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne at suse.de>

Regards,
Nicolas


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