Avoid ram_end = 0 on 32bit targets with ram_end at 4G.
Signed-off-by: Patrick Delaunay <patrick.delau...@st.com>
---
example of issue in stm32mp1 board ev1:
ram_start = c0000000
size = 40000000
ram_end = 100000000
ram_end &= ~EFI_PAGE_MASK => result is 0
lib/efi_loader/efi_memory.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/lib/efi_loader/efi_memory.c b/lib/efi_loader/efi_memory.c
index 55622d2..81dc5fc 100644
--- a/lib/efi_loader/efi_memory.c
+++ b/lib/efi_loader/efi_memory.c
@@ -574,6 +574,10 @@ __weak void efi_add_known_memory(void)
/* Remove partial pages */
ram_end &= ~EFI_PAGE_MASK;
+ /* Fix for 32bit targets with ram_top at 4G */
+ if (!ram_end)
+ ram_end = 0x100000000ULL;
+
ram_start = (ram_start + EFI_PAGE_MASK) & ~EFI_PAGE_MASK;
if (ram_end <= ram_start) {
--
2.7.4
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