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);
--
2.47.2
