jetson-tk1 has 2 GB of RAM at 0x80000000, causing gd->ram_top to be zero.
Handle this by replacing it with 0x100000000 in that case.

Cc: Alexander Graf <[email protected]>
Signed-off-by: Andreas Färber <[email protected]>
---
 lib/efi_loader/efi_memory.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/efi_loader/efi_memory.c b/lib/efi_loader/efi_memory.c
index 138736f..7b87108 100644
--- a/lib/efi_loader/efi_memory.c
+++ b/lib/efi_loader/efi_memory.c
@@ -225,7 +225,7 @@ efi_status_t efi_allocate_pages(int type, int memory_type,
        switch (type) {
        case 0:
                /* Any page */
-               addr = efi_find_free_memory(len, gd->ram_top);
+               addr = efi_find_free_memory(len, gd->ram_top == 0 ? 
0x100000000ull : gd->ram_top);
                if (!addr) {
                        r = EFI_NOT_FOUND;
                        break;
@@ -343,7 +343,7 @@ int efi_memory_init(void)
 
        /* Add U-Boot */
        uboot_start = (gd->start_addr_sp - uboot_stack_size) & ~EFI_PAGE_MASK;
-       uboot_pages = (gd->ram_top - uboot_start) >> EFI_PAGE_SHIFT;
+       uboot_pages = ((gd->ram_top == 0 ? 0x100000000ull : gd->ram_top) - 
uboot_start) >> EFI_PAGE_SHIFT;
        efi_add_memory_map(uboot_start, uboot_pages, EFI_LOADER_DATA, false);
 
        /* Add Runtime Services */
-- 
2.6.6

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