| commit | d39222c9b11d02f4b68dfb798676ca170b36a006 | [log] [tgz] |
|---|---|---|
| author | Mike Voydanoff <voydanoff@google.com> | Thu Dec 13 19:55:36 2018 -0800 |
| committer | Mike Voydanoff <voydanoff@google.com> | Fri Dec 14 07:00:14 2018 -0800 |
| tree | f42c8674ae6673c38ac7e8dbab9a7017a611b78d | |
| parent | a4df296207a188566c96a84905e87ee49754e100 [diff] |
[usb] Prepare for soft transition in USB protocol Add ZX_PROTOCOL_USB_OLD and ZX_PROTOCOL_USB_DEVICE_OLD as aliases for ZX_PROTOCOL_USB and ZX_PROTOCOL_USB_DEVICE. Switch Zircon USB drivers to use ZX_PROTOCOL_USB_OLD and ZX_PROTOCOL_USB_DEVICE_OLD. After the garnet drivers also switch to ZX_PROTOCOL_USB_OLD and ZX_PROTOCOL_USB_DEVICE_OLD, we can add new banjo based protocol for ZX_PROTOCOL_USB and ZX_PROTOCOL_USB_DEVICE and switch our USB drivers to the new protocol incrementally. TEST: USB works on NUC. Change-Id: I38e039004bfc91b0fdd289959f281890ba3157e2
Zircon is the core platform that powers the Fuchsia OS. Zircon is composed of a microkernel (source in kernel/...) as well as a small set of userspace services, drivers, and libraries (source in system/...) necessary for the system to boot, talk to hardware, load userspace processes and run them, etc. Fuchsia builds a much larger OS on top of this foundation.
The canonical Zircon Git repository is located at: https://fuchsia.googlesource.com/zircon
A read-only mirror of the code is present at: https://github.com/fuchsia-mirror/zircon
The Zircon Kernel provides syscalls to manage processes, threads, virtual memory, inter-process communication, waiting on object state changes, and locking (via futexes).
Currently there are some temporary syscalls that have been used for early bringup work, which will be going away in the future as the long term syscall API/ABI surface is finalized. The expectation is that there will be about 100 syscalls.
Zircon syscalls are generally non-blocking. The wait_one, wait_many port_wait and thread sleep being the notable exceptions.
This page is a non-comprehensive index of the zircon documentation.