From: prabhakar.pkin@gmail.com
To: devel@edk2.groups.io
Subject: How /sys/firmware/fdt getting created
Date: Tue, 29 Oct 2019 20:02:05 +0530 [thread overview]
Message-ID: <ae74bb79-a68e-a319-f61c-5b93fd70ae59@gmail.com> (raw)
Hi All,
I am working on Ubuntu-18.04 with UEFI on ARM64(64 bit) platform. The
UEFI used is having ACPI tables.
I am trying to understand where and how /sys/firmware/fdt is getting
created. is it created by UEFI or grub and passed to Linux?
below is the dts format of /sys/firmware/fdt.
/dts-v1/;
/ {
chosen {
linux,uefi-mmap-desc-ver = <0x1>;
linux,uefi-mmap-desc-size = <0x30>;
linux,uefi-mmap-size = <0xcc0>;
linux,uefi-mmap-start = <0x0 0xeda13018>;
linux,uefi-system-table = <0x0 0xfafd0018>;
bootargs = "BOOT_IMAGE=/boot/vmlinuz-5.4.0-rc4+
root=UUID=798a858c-4f20-4b99-aa40-99bff9394093 ro crashkernel=2G
console=ttyAMA0";
linux,initrd-end = <0x0 0xeb381a34>;
linux,initrd-start = <0x0 0xdd5f5000>;
};
};
also, under what scenario/config fields is getting added fdt.
#size-cells = <0x02>;
#address-cells = <0x02>;
--prabhakar (pk)
next reply other threads:[~2019-10-29 14:32 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-29 14:32 prabhakar.pkin [this message]
2019-10-30 7:12 ` [edk2-devel] How /sys/firmware/fdt getting created Ard Biesheuvel
2019-10-30 7:36 ` Prabhakar Kushwaha
2019-10-30 7:44 ` Ard Biesheuvel
2019-10-30 8:16 ` Prabhakar Kushwaha
2019-10-31 10:07 ` Laszlo Ersek
2019-10-31 12:16 ` Leif Lindholm
2019-10-31 18:55 ` dann frazier
[not found] ` <15D2D0302F8A1888.21389@groups.io>
2019-10-31 20:34 ` dann frazier
2019-11-01 4:47 ` Prabhakar Kushwaha
2019-11-01 16:25 ` dann frazier
2019-11-04 4:11 ` Prabhakar Kushwaha
2019-10-31 20:29 ` Bhupesh Sharma
2019-11-01 4:51 ` Prabhakar Kushwaha
2019-11-01 5:46 ` Bhupesh Sharma
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