From 4c4bf654746eae5a042bde6c150d534d8849b762 Mon Sep 17 00:00:00 2001 From: Ard Biesheuvel Date: Fri, 12 Sep 2014 14:06:50 +0100 Subject: [PATCH] hw/arm/boot: load DTB as a ROM image 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 Signed-off-by: Ard Biesheuvel Message-id: 1410453915-9344-2-git-send-email-ard.biesheuvel@linaro.org Signed-off-by: Peter Maydell --- hw/arm/boot.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/hw/arm/boot.c b/hw/arm/boot.c index e32f2f4158..50eca931e1 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); -- 2.11.4.GIT