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Brennan Ashton
46b0f6d6ee
VELAPLATFO-12536 This provides the initial hooks for Flattened Device Tree support with QEMU RV. It also provides a new procfs file that exposes the fdt to userspace much like the /sys/firmware/fdt endpoint in Linux. See https://www.kernel.org/doc/Documentation/ABI/testing/sysfs-firmware-ofw Nodes in the fdt are not yet usable by the OS. Signed-off-by: Brennan Ashton <bashton@brennanashton.com> Signed-off-by: liaoao <liaoao@xiaomi.com>
fs/procfs README
================
This is a tiny procfs file system that allows read-only access to a few
attributes of a task or thread. This tiny procfs fs file system can be
built into the system by enabling:
CONFIG_FS_PROCFS=y
It can then be mounted from the NSH command like like:
nsh> mount -t procfs /proc
Example
=======
NuttShell (NSH) NuttX-6.31
nsh> mount -t procfs /proc
nsh> ls /proc
/proc:
0/
1/
nsh> ls /proc/1
/proc/1:
status
cmdline
nsh> cat /proc/1/status
Name: init
Type: Task
State: Running
Priority: 100
Scheduler: SCHED_FIFO
SigMask: 00000000
nsh> cat /proc/1/cmdline
init
nsh> sleep 100 &
sleep [2:100]
nsh> ls /proc
ls /proc
/proc:
0/
1/
2/
nsh> cat /proc/2/cmdline
<pthread> 0x527420