Hi Patrick On 7/26/21 11:55 AM, Patrick Delaunay wrote: > The function board_get_usable_ram_top can to called after relocation > with total_size = 0 to get the uppermost pointer that is valid to access > in U-Boot. > > When total_size = 0, the reserved memory should be not take in account > with lmb library and 'gd->ram_base + gd->ram_size' can be used. > > It is the case today in lib/efi_loader/efi_memory.c:efi_add_known_memory() > and this patch avoids that the reserved memory for OP-TEE is not part of > the EFI available memory regions. > > Signed-off-by: Patrick Delaunay <[email protected]> > --- > Patch to correct the UEFI support for STM32MP platform > after Heinrich's remark on patch [1]. > > [1] efi_loader: replace board_get_usable_ram_top by gd->ram_top > http://patchwork.ozlabs.org/project/uboot/patch/20210709124630.1.I212e7cd96724368b8272300c59c2a1c1f227ed67@changeid/ > > arch/arm/mach-stm32mp/dram_init.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/arch/arm/mach-stm32mp/dram_init.c > b/arch/arm/mach-stm32mp/dram_init.c > index 3c097029bd..94f25f34e0 100644 > --- a/arch/arm/mach-stm32mp/dram_init.c > +++ b/arch/arm/mach-stm32mp/dram_init.c > @@ -46,6 +46,9 @@ ulong board_get_usable_ram_top(ulong total_size) > phys_addr_t reg; > struct lmb lmb; > > + if (!total_size) > + return gd->ram_base + gd->ram_size; > + > /* found enough not-reserved memory to relocated U-Boot */ > lmb_init(&lmb); > lmb_add(&lmb, gd->ram_base, gd->ram_size); >
Reviewed-by: Patrice Chotard <[email protected]> Thanks Patrice
