genode/repos
Adrian-Ken Rueegsegger 7ce8464b3a hw_x86_64: Enable FPU support
* Enable the use of the FXSAVE and FXRSTOR instructions, see Intel SDM
  Vol. 3C, section 2.5.
* The state of the x87 floating point unit (FPU) is loaded and saved on
  demand.
* Make the cr0 control register accessible in the Cpu class. This is in
  preparation of the upcoming FPU management.
* Access to the FPU is disabled by setting the Task Switch flag in the cr0
  register.
* Access to the FPU is enabled by clearing the Task Switch flag in the cr0
  register.
* Implement FPU initialization
* Add is_fpu_enabled helper function
* Add pointer to CPU lazy state to CPU class
* Init FPU when finishing kernel initialization
* Add function to retry FPU instruction:
    Similar to the ARM mechanism to retry undefined instructions, implement a
    function for retrying an FPU instruction. If a floating-point instruction
    causes an #NM exception due to the FPU being disabled, it can be retried
    after the correct FPU state is restored, saving the current state and
    enabling the FPU in the process.
* Disable FPU when switching to different user context:
    This enables lazy save/restore of the FPU since trying to execute a
    floating point instruction when the FPU is disabled will cause a #NM
    exception.
* Declare constant for #NM exception
* Retry FPU instruction on #NM exception
* Assure alignment of FXSAVE area:
    The FXSAVE area is 512-byte memory region that must be 16-byte aligned. As
    it turns out the alignment attribute is not honored in all cases so add a
    workaround to assure the alignment constraint is met by manually rounding
    the start of the FXSAVE area to the next 16-byte boundary if necessary.
2015-03-27 11:53:31 +01:00
..
base hw_x86_64: Enable FPU support 2015-03-27 11:53:31 +01:00
base-codezero base: refactor signal_transmitter::submit 2015-03-19 09:32:52 +01:00
base-fiasco base: refactor signal_transmitter::submit 2015-03-19 09:32:52 +01:00
base-foc base: refactor signal_transmitter::submit 2015-03-19 09:32:52 +01:00
base-host base: refactor signal_transmitter::submit 2015-03-19 09:32:52 +01:00
base-hw hw_x86_64: Enable FPU support 2015-03-27 11:53:31 +01:00
base-linux base: refactor signal_transmitter::submit 2015-03-19 09:32:52 +01:00
base-nova nova: leverage kernel to implement Genode signals 2015-03-27 11:53:11 +01:00
base-okl4 okl4: check result of bind_thread 2015-03-27 11:53:12 +01:00
base-pistachio base: refactor signal_transmitter::submit 2015-03-19 09:32:52 +01:00
dde_ipxe nic session: link-state change handling 2015-03-27 11:53:13 +01:00
dde_linux nic session: link-state change handling 2015-03-27 11:53:13 +01:00
dde_oss run: constrain physical memory for pci/acpi driver 2015-02-16 13:40:38 +01:00
dde_rump arm: enable cpu cortex_a15 compiler flag 2015-02-27 11:48:04 +01:00
demo launchpad: handle case running out of threads 2015-03-27 11:53:12 +01:00
gems gems: let run decorator-stress on 64bit 2015-03-27 11:53:12 +01:00
hello_tutorial Add filenames to code snippets in hello_tutorial 2015-01-26 12:28:42 +01:00
libports libc: use correct type for dummy libc functions 2015-03-27 11:53:16 +01:00
os nic session: link-state change handling 2015-03-27 11:53:13 +01:00
ports libc: use correct type for dummy libc functions 2015-03-27 11:53:16 +01:00
ports-foc Move packet stream to Genode namespace, fix #1455 2015-03-19 08:57:22 +01:00
README Remove repos/qt4, fix #1451 2015-03-19 08:57:20 +01:00

README

                      ===============================
                      Genode source-code repositories
                      ===============================


This directory contains the source-code repositories of the Genode OS
Framework. Each sub directory has the same principle layout as described in the
build-system manual:

:Build-system manual:

  [http://genode.org/documentation/developer-resources/build_system]

The build system uses a configurable selection of those reposities to obtain
the source codes for the build process. The repositories are not independent
but build upon of each other:

:'base':

  This directory contains the source-code repository of the fundamental
  frameworks and interfaces of Genode. Furthermore, it contains the generic
  parts of core.

:'base-<platform>':
  These directories contain platform-specific source-code repositories
  complementing the 'base' repository. The following platforms are supported:

  :'linux':
    Linux kernel (both x86_32 and x86_64)

  :'nova':
    NOVA hypervisor developed at University of Technology Dresden
    See [http://genode.org/documentation/platforms/nova]

  :'foc':
    Fiasco.OC is a modernized version of the Fiasco microkernel with a
    completely revised kernel interface fostering capability-based
    security. It is not compatible with L4/Fiasco.
    See [http://genode.org/documentation/platforms/foc]

  :'hw':
    The hw platform allows the execution of Genode on bare ARM hardware
    without the need for a separate kernel. The kernel functionality is
    included in core.
    See [http://genode.org/documentation/platforms/hw]

  :'okl4':
    OKL4 kernel (x86_32 and ARM) developed at Open-Kernel-Labs.
    See [http://genode.org/documentation/platforms/okl4]

  :'pistachio':
    L4ka::Pistachio kernel developed at University of Karlsruhe.
    See [http://genode.org/documentation/platforms/pistachio]

  :'fiasco':
    L4/Fiasco kernel developed at University of Technology Dresden.
    See [http://genode.org/documentation/platforms/fiasco]

  :'codezero':
    Codezero microkernel developed by B-Labs
    See [http://genode.org/documentation/platforms/codezero]

  :'host':
    Pseudo platform documenting the interface between the generic and
    platform-specific parts of the base framework. This is not a functional
    base platform.

:'os':

  This directory contains the non-base OS components such as the init process,
  device drivers, and basic system services.

:'demo':

  This directory contains the source-code repository of various services and
  applications that we use for demonstration purposes. For example, a graphical
  application launcher called Launchpad and the Scout tutorial browser.

:'hello_tutorial':

  Tutorial for creating a simple client-server scenario with Genode. This
  repository includes documentation and the complete source code.

:'libports':

  This source-code repository contains ports of popular open-source libraries
  to Genode, most importantly the C library. The repository contains no
  upstream source code but means to download the code and adapt it to Genode.
  For instructions about how to use this mechanism, please consult the README
  file at the top level of the repository. Among the 3rd-party libraries
  are Qt5, libSDL, freetype, Python, ncurses, Mesa, and libav.

:'dde_linux':

  This source-code repository contains the device driver environment for
  executing Linux device drivers natively on Genode. Currently, this
  repository hosts the USB stack.

:'dde_ipxe':

  This source-code repository contains the device-driver environment for
  executing drivers of the iPXE project.

:'dde_oss':

  This source-code repository contains the device-driver environment for the
  audio drivers of the Open Sound System (OSS).

:'dde_rump':

  This source-code repository contains the port of rump kernels, which are
  used to execute subsystems of the NetBSD kernel as user level processes.
  The repository contains a server that uses a rump kernel to provide
  various NetBSD file systems to Genode.

:'ports':

  This source-code repository hosts ports of 3rd-party applications to
  Genode. The repository does not contain upstream source code but provides
  a mechanism for downloading the official source distributions and adapt
  them to the Genode environment. The used mechanism is roughly the same
  as used for the 'libports' repository. Please consult 'libports/README'
  for further information.

:'ports-<platform>':

  These platform-specific source-code repositories contain software that
  capitalizes special features of the respective kernel platform.
  For the Fiasco.OC platform, 'ports-foc' hosts a port of the L4Linux
  kernel. For further information, please refer to the README file at the
  top level of the respective repository.

:'gems':

  This source-code repository contains Genode applications that use
  both native Genode interfaces as well as features of other high-level
  repositories, in particular shared libraries provided by 'libports'.