geom_flashmap linux compatibility

[Mori Hiroki]

Hi

I want get linux dts compatibility geom_flashmap.

Current FreeBSD dts need set offset and size directory.

for example.

                partition at 20000 {
                        label = "kernel";
                        reg = <0x20000 0x100000>;
                };

                partition at 110000 {
                        label = "rootfs";
                        reg = <0x120000 0x6e0000>;
                };

But Linux dts is this.

                partition at 50000 {
                        label = "firmware";
                        reg = <0x50000 0x7b0000>;
                };

Linux have find rootfs point by u-boot header.

I make prototype this. But abandon.

https://reviews.freebsd.org/D13648


Some body work this ?

Thanks

Hiroki Mori