How to use device tree in x86_64

[Mehran Memarnejad]

Hi,
I have a requirement in which I need to use the same approach uboot uses in
ARM platforms. I know it's uncommon to do so in x86_64 as devices are hot
pluggable (connected by usb and pcie), But I need it for my requirement.
I want to use device tree with *grub* in *x86_64* and pass it to *linux*
kernel in *ubuntu*

Technically, I have a minimal device tree as following:

/dts-v1/;

/ {
    model = "Custom x86 Platform";

    soc@0 {
#address-cells = <1>;
#size-cells = <1>;

        simple_platform_device@0 {
            compatible = "simple,platform-device";    // Driver matching
string
            reg = <0x0 0x0>;
        };
    };
};

The primary goal is to call probe function of the corresponding platform
device driver which has the same compatible string.
Searching about device tree support in grub on x86, I found some results
but could not get it to work. I guess I need to do the following:
1) Enable Kernel Device Tree Support (CONFIG_OF) [Already Done]
2) Building Grub from source with device tree support [HOW?]
3) Edit grub config file to insert device tree dtb path [HOW?]

The above items (2 and 3) are my questions
Thanks in advance for your help