On 3/9/25 03:05, Marek Vasut wrote:
> On STM32MP15xx with 1 GiB of DRAM, the gd->ram_top becomes 0,
> because DRAM base 0xc0000000 + DRAM size 0x40000000 leads to
> gd->ram_top overflow which resets it to 0. Handle this special
> case simply by checking for gd->ram_top being zero, and if it
> is, assume there is no addr >= gd->ram_top .
>
> This fixes boot hang on STM32MP15xx with 1 GiB of DRAM.
>
> Fixes: 25fb58e88aba ("ARM: stm32mp: Fix dram_bank_mmu_setup() for LMB located
> above ram_top")
> Signed-off-by: Marek Vasut <[email protected]>
> ---
> Cc: Ilias Apalodimas <[email protected]>
> Cc: Lukasz Majewski <[email protected]>
> Cc: Marek Vasut <[email protected]>
> Cc: Patrice Chotard <[email protected]>
> Cc: Patrick Delaunay <[email protected]>
> Cc: Simon Glass <[email protected]>
> Cc: Sughosh Ganu <[email protected]>
> Cc: Tom Rini <[email protected]>
> Cc: [email protected]
> Cc: [email protected]
> ---
> arch/arm/mach-stm32mp/stm32mp1/cpu.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/arm/mach-stm32mp/stm32mp1/cpu.c
> b/arch/arm/mach-stm32mp/stm32mp1/cpu.c
> index cb1b84c9af9..d5eaf6711b6 100644
> --- a/arch/arm/mach-stm32mp/stm32mp1/cpu.c
> +++ b/arch/arm/mach-stm32mp/stm32mp1/cpu.c
> @@ -82,7 +82,7 @@ void dram_bank_mmu_setup(int bank)
> option = DCACHE_DEFAULT_OPTION;
> if (use_lmb &&
> (lmb_is_reserved_flags(i << MMU_SECTION_SHIFT, LMB_NOMAP) ||
> - addr >= gd->ram_top)
> + (gd->ram_top && addr >= gd->ram_top))
> )
> option = 0; /* INVALID ENTRY in TLB */
> set_section_dcache(i, option);
Hi Marek
Reviewed-by: Patrice Chotard <[email protected]>
Thanks
Patrice
