diff mbox

[v2,1/4] hw/arm/boot: load DTB as a ROM image

Message ID 1410346790-31743-2-git-send-email-ard.biesheuvel@linaro.org
State Superseded
Headers show

Commit Message

Ard Biesheuvel Sept. 10, 2014, 10:59 a.m. UTC 
In order to make the device tree blob (DTB) available in memory not only at
first boot, but also after system reset, use rom_blob_add_fixed() to install
it into memory.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
---
 hw/arm/boot.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
diff mbox

Patch

diff --git a/hw/arm/boot.c b/hw/arm/boot.c
index e32f2f415885..50eca931e1a4 100644
--- a/hw/arm/boot.c
+++ b/hw/arm/boot.c
@@ -396,7 +396,10 @@  static int load_dtb(hwaddr addr, const struct arm_boot_info *binfo)
 
     qemu_fdt_dumpdtb(fdt, size);
 
-    cpu_physical_memory_write(addr, fdt, size);
+    /* Put the DTB into the memory map as a ROM image: this will ensure
+     * the DTB is copied again upon reset, even if addr points into RAM.
+     */
+    rom_add_blob_fixed("dtb", fdt, size, addr);
 
     g_free(fdt);