genode

History

Josef Söntgen 85599c072f os: use async IRQ and server lib in drivers Use the new asynchronous IRQ interface in the mostly used drivers, e.g.: * ahci_drv: x86/exynos5 * gpio_drv: imx53/omap4 * input_drv: imx53/dummy * ps2_drv: x86/pl050 * timer_drv Now, the Irq_session is requested from Gpio::Session: From now on we use an asynchronous IRQ interface. To prevent triggering another GPIO IRQ while currently handling the former one, IRQs must now by acknowledged explicitly. While here, we also changed the GPIO session interface regarding IRQ management. The generic GPIO component now wraps the Irq_session managed by the backend instead of using the GPIO backend methods directly. A client using the GPIO session may request the Irq_session_capability by calling 'Gpio::Session::irq_session()' and can use this capability when using a local Irq_session_client. Issue #1456.		2015-04-23 16:47:59 +02:00
..
exynos5	os: use async IRQ and server lib in drivers	2015-04-23 16:47:59 +02:00
include	os: use async IRQ and server lib in drivers	2015-04-23 16:47:59 +02:00
x86	os: use async IRQ and server lib in drivers	2015-04-23 16:47:59 +02:00
README	Move repositories to 'repos/' subdirectory	2014-05-14 16:08:00 +02:00
empty.cc	Move repositories to 'repos/' subdirectory	2014-05-14 16:08:00 +02:00
main.cc	ahci: avoid to reinstantiate backend driver	2015-01-12 14:24:55 +01:00
target.mk	Move repositories to 'repos/' subdirectory	2014-05-14 16:08:00 +02:00

README

This directory contains an implementation of a simple AHCI driver.

Behavior
--------

The server implements Genode's new block-driver API ('os/include/block'), thus
exposing the block-session interface as front-end. AHCI depends on Genode's PCI
driver as well as the timer server. For a usage example see: 'os/run/ahci.run'.

Limitations and known issues
----------------------------

Currently, the server scans the PCI bus at startup and retrieves the first available
AHCI controller, scans the controller ports and uses the first non-ATAPI port
where a device is present.

On real hardware and on kernels taking advantage of I/O APICs (namely NOVA and
Fiasco.OC) we still lack support for ACPI parsing and thus for interrupts,
leading to a non-working driver.