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stm32mp: Fix board_get_usable_ram_top()

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When booting in EFI, lib/efi_loader/efi_memory.c calls
board_get_usable_ram_top(0) which returns by default
gd->ram_base + gd->ram_size which is the top of DDR.

In case of OPTEE boot, the top of DDR is currently reserved by OPTEE,
board_get_usable_ram_top(0) must return an address outside OPTEE
reserved memory.

gd->ram_top matches this constraint as it has already been initialized
by substracting all DT reserved-memory (included OPTEE memory area).

Fixes: 92b611e8b0 ("stm32mp: correctly handle board_get_usable_ram_top(0)")

Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
This commit is contained in:
Patrice Chotard 2021-09-01 09:56:02 +02:00 committed by Patrick Delaunay
parent ecd6e0ce5a
commit c8510e397f
1 changed files with 1 additions and 1 deletions
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arch/arm/mach-stm32mp/dram_init.c
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@ -47,7 +47,7 @@ ulong board_get_usable_ram_top(ulong total_size)
struct lmb lmb;
if (!total_size)
return gd->ram_base + gd->ram_size;
return gd->ram_top;
/* found enough not-reserved memory to relocated U-Boot */
lmb_init(&lmb);