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-rw-r--r--cmd/bootefi.c30
1 files changed, 26 insertions, 4 deletions
diff --git a/cmd/bootefi.c b/cmd/bootefi.c
index 9b8af65052..b213ef172d 100644
--- a/cmd/bootefi.c
+++ b/cmd/bootefi.c
@@ -12,7 +12,7 @@
#include <errno.h>
#include <libfdt.h>
#include <libfdt_env.h>
-#include <malloc.h>
+#include <memalign.h>
#include <asm/global_data.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -104,12 +104,34 @@ static struct efi_object bootefi_device_obj = {
static void *copy_fdt(void *fdt)
{
u64 fdt_size = fdt_totalsize(fdt);
+ unsigned long fdt_ram_start = -1L, fdt_pages;
+ u64 new_fdt_addr;
void *new_fdt;
+ int i;
- /* Give us 64kb breathing room */
- fdt_size += 64 * 1024;
+ for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
+ u64 ram_start = gd->bd->bi_dram[i].start;
+ u64 ram_size = gd->bd->bi_dram[i].size;
- new_fdt = malloc(fdt_size);
+ if (!ram_size)
+ continue;
+
+ if (ram_start < fdt_ram_start)
+ fdt_ram_start = ram_start;
+ }
+
+ /* Give us at least 4kb breathing room */
+ fdt_size = ALIGN(fdt_size + 4096, 4096);
+ fdt_pages = fdt_size >> EFI_PAGE_SHIFT;
+
+ /* Safe fdt location is at 128MB */
+ new_fdt_addr = fdt_ram_start + (128 * 1024 * 1024) + fdt_size;
+ if (efi_allocate_pages(1, EFI_BOOT_SERVICES_DATA, fdt_pages,
+ &new_fdt_addr) != EFI_SUCCESS) {
+ /* If we can't put it there, put it somewhere */
+ new_fdt_addr = (ulong)memalign(4096, fdt_size);
+ }
+ new_fdt = (void*)(ulong)new_fdt_addr;
memcpy(new_fdt, fdt, fdt_totalsize(fdt));
fdt_set_totalsize(new_fdt, fdt_size);
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