| Message ID | 1409930126-28449-6-git-send-email-ard.biesheuvel@linaro.org |
|---|---|
| State | New |
| Headers | show |
On 5 September 2014 16:15, Ard Biesheuvel <ard.biesheuvel@linaro.org> wrote: > 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. > > Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> > --- > 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 0cfc11d42962..8d8653978dfe 100644 > --- a/hw/arm/boot.c > +++ b/hw/arm/boot.c > @@ -400,7 +400,10 @@ 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); Reviewed-by: Peter Maydell <peter.maydell@linaro.org> -- PMM
diff --git a/hw/arm/boot.c b/hw/arm/boot.c index 0cfc11d42962..8d8653978dfe 100644 --- a/hw/arm/boot.c +++ b/hw/arm/boot.c @@ -400,7 +400,10 @@ 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);
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. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> --- hw/arm/boot.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)