Commit Graph

727 Commits

Author SHA1 Message Date
Johannes Schlatow
9fc3344ee8 trace/buffer: keep "last" entry on wraps
When the former trace buffer implementation wrapped, the last entry
according to commit order couldn't be detected anymore. Now, the last
committed entry is always followed by an entry with length 0.

As a downside of this, there are now two meanings of "last" entry: It
means either that the entry marks the empty padding after the entry with
the highest memory address or that it actually marks the end of the
buffer according to commit order. This is an example state of the buffer
with the two types of "last" entry:

                           last                                     last
+-------------+------------+---+---------+-------------+------------+---+-------+
| len3  data3 | len4 data4 | 0 | empty   | len1  data1 | len2 data2 | 0 | empty |
+-------------+------------+---+---------+-------------+------------+---+-------+

If the entry with the highest memory address fits perfectly, the first
type of "last" entry is not needed:

                                  last
+------------+--------------------+---+-------+-------------+-------------------+
| len3 data3 | len4         data4 | 0 | empty | len1  data1 | len2        data2 |
+------------+--------------------+---+-------+-------------+-------------------+

If the buffer didn't wrap so far, there is only one "last" entry that
has both meanings:

                                                      last
+--------------------------+------------+-------------+---+---------------------+
| len1               data1 | len2 data2 | len3  data3 | 0 | empty               |
+--------------------------+------------+-------------+---+---------------------+

Issue #2735

Co-authored-by: Martin Stein <martin.stein@genode-labs.com>
2018-05-03 15:31:54 +02:00
Johannes Kliemann
c02ef3ec94 ada: compile runtime bodies, customizable tools
This is a follow-up commit for "ada: runtime and library support".

Issue #2748
2018-05-03 15:31:21 +02:00
Christian Helmuth
47569458d4 depot: update recipe hashes 2018-04-19 12:39:20 +02:00
Johannes Kliemann
1261c18ce9 ada: runtime and library support
The Ada runtime can now be set with the ADA_RTS variable. The ada
library builds a (currently) minimal runtime from the gcc sources that
come with Genode (to stay consistent with the used compiler) and sets
the runtime path accordingly. It is build as a shared library ada.lib.so
which needs to be added to the build files.

I split the existing Ada test into program and library, and moved it
to libports as it depends on the runtime library residing in this
repository too.

Fixes #2748
2018-04-19 12:38:54 +02:00
Norman Feske
cb78516bf1 os: add tests to autopilot
Since the autopilot has become able to use the depot, futher tests can
be enabled by default.
2018-04-19 12:38:53 +02:00
Stefan Kalkowski
ad99688853 imx53_qsb: enable automated network tests
Fix #2749
2018-04-19 12:38:24 +02:00
Stefan Kalkowski
f653be1ebc gpio_drv: add support for i.MX6
Fix #2750
2018-04-19 12:38:24 +02:00
Josef Söntgen
372e426ec7 platform_drv: recognize PCIe NVMe controller
Issue #2747.
2018-04-10 13:56:22 +02:00
Christian Helmuth
d54f95d497 depot: update recipe hashes 2018-04-10 13:03:26 +02:00
Christian Helmuth
92edcb17e5 Warn on redundant call to exec_static_constructors() 2018-04-10 11:20:43 +02:00
Martin Stein
38dbd59d8a timeout: become independent of the Alarm framework
Integrate the code of the Alarm framework directly into the Timeout
framework.  The former Alarm-framework methods are all private to the
corresponding classes of the Timeout framework and get prefixed with
'_alarm__'. The latter avoids name clashes and makes it easier to
simplify the code later.

Issue #2704
2018-04-10 11:11:54 +02:00
Martin Stein
ff7c378ff9 bit_allocator: alloc specific block of bits
Method to try to allocate specific bits of the Bit_allocator_dynamic.

Ref #2670
2018-03-29 15:16:11 +02:00
Martin Stein
8c65219c96 util/string: add ascii_to for unsigned short
Ref #2670
2018-03-29 15:09:05 +02:00
Martin Stein
eb11e077fc list_model: fix missing include
Ref #2670
2018-03-29 15:07:15 +02:00
Alexander Boettcher
4b826d10ef grub2: update to fix boots without using bender
Fixes #2727
2018-03-29 14:59:05 +02:00
Reto Buerki
47724c68c2 platform_drv/x86: Switch to ECAM/MMCONF
Switch port I/O based PCI config space access to memory-mapped IO.  The
base address of the PCI configuration space is acquired by mapping the
ACPI ROM and reading the first <bdf> node. An exception is thrown if the
first <bdf> node is not for PCI domain zero or if multiple <bdf> nodes
exist. This is to reduce complexity and also because multiple PCI
domains are rare.

The PCI configuration space is accessed via I/O mem dataspace which is
created in the platform_drv root and then passed on to the PCI session,
device components and finally to the actual PCI config access instances.

The memory access code is implemented in a way to make it work with Muen
subject monitor (SM) device emulation and also general x86 targets. On
Muen, the simplified device emulation code (which works also for Linux)
always returns 0xffff in EAX to indicate a non-existing device.
Therefore, EAX is enforced in the assembly templates.

Fixes #2547
2018-03-29 14:59:04 +02:00
Christian Helmuth
1f7b5e75bf depot: update recipe hashes 2018-03-08 12:05:10 +01:00
Emery Hemingway
ed1c87c8d6 Xml_generator support for floating point values
Ref #2702
2018-03-08 12:05:08 +01:00
Christian Helmuth
a8f186c7d4 depot: update recipe hashes 2018-02-28 11:05:05 +01:00
Christian Helmuth
d72517e673 Remove replenish error message from quota guard 2018-02-28 11:05:04 +01:00
Stefan Kalkowski
9f945a782f run: enable Wandquad board for network tests
Ref #2665
2018-02-28 11:04:57 +01:00
Norman Feske
8d09d02b85 depot: update recipe hashes 2018-02-09 13:34:24 +01:00
Martin Stein
abf9557bb5 AVL node/tree: make non-copyable
AVL trees can't be copied with the default copy constructor as the
parent pointer of the first item of both of the resulting trees would
point to the original tree. Copying an AVL node, however, generally
violates the integrity of the corresponding tree. The copy constructor
of Avl_tree is used in some places but in those places it can be
replaced easily. So, this commit deletes the copy constructor of
Avl_node_base which makes Avl_node and Avl_tree non-copyable.

Issue #2654
2018-02-09 13:34:23 +01:00
Emery Hemingway
79a433ae77 Fix Nim release mode
Append "-d:release" to NIM_OPTS, not NIM_ARGS in the 'release' spec.
Compiling for a release removes some runtime assertions.

Fix #2662
2018-02-09 13:34:23 +01:00
Stefan Kalkowski
28f7568e82 run: always return driver names in platform.inc
On platforms without nic or audio driver support, the corresponding
functions to return the correct names should return a meaningful
name instead of an empty list. Otherwise, in an erroneous run-script
that calls those functions to append names to the boot modules
the whole 'bin' directory is appended instead, which leads to big
image files or errors when linking the boot modules to core.
2018-02-09 13:34:22 +01:00
Martin Stein
c10554851d trace_session: fix exception list in 'trace' RPC
Trace_session::trace might throw Nonexistant_subject which was neither
documented nor declared in the RPC interface.

Issue #2654
2018-02-09 13:34:19 +01:00
Martin Stein
c68d551c41 base/trace/buffer.h: fix circular #include
Previously, base/trace/buffer.h included base/thread.h which includes
base/trace/logger.h which includes base/trace/buffer.h.

Removed the base/thread.h include in base/trace/buffer.h as it is not
needed.

Issue #2654
2018-02-09 13:34:19 +01:00
Johannes Schlatow
bfe0031304 base-hw: enable SMP support for Zynq-7000 boards
Issue #2641
2018-02-09 13:34:19 +01:00
Norman Feske
10f1616c28 base: add util/list_model.h
The new 'List_model' utility helps with the implementation of
component-internal data models created and updated from XML.

Fixes #2653
2018-02-09 13:34:17 +01:00
Alexander Boettcher
a9a8c65f53 base: remove debug message from Allocator_guard 2018-02-09 13:34:15 +01:00
Norman Feske
e0e9b3b32e init: close all sessions of exited children
With this patch, init responds to the exit of a child by closing all
sessions of the child. E.g., if a child is a GUI application, its
nitpicker session is closed at the time of exit, not at the time when
the start node disappears from init's configuration.

Since this change requires a modification of the 'Genode::Child' class,
it takes the chance to make the child-destruction less brutal. The
new version ensures that all threads of the destructed subsystem are
destructed before other sessions, in particular PD sessions. This
eliminates spurious page-fault warnings during the child destruction.

On Fiasco.OC, closing the CPU session of a thread while being called by
the thread causes a deadlock. Hence, we skip the eager destruction of
CPU sessions on this kernel.

Related to issue #2659
2018-02-09 13:31:27 +01:00
Alexander Boettcher
9fc4ee5f6c base: free up all meta-data of trace subjects
Issue #2638
2018-02-09 13:26:02 +01:00
Martin Stein
26f65f4996 Xml_node: fix bug in Xml_node::decoded_content
Previously, the dst_len value was not decreased after each character that was
written to the dst buffer. This way, if the content length was greater than
dst_len, decoded_content wrote to memory out of bounds.

Issue #2644
2018-02-09 13:26:02 +01:00
Martin Stein
84e476facb Xml_node: do not consider '0' in decoded_content
Do not leave space for a terminating '0' at the end of the dst buffer in
decoded_content as the method does not write this '0'. The caller of the
method shall take care of it instead.

Issue #2644
2018-02-09 13:26:01 +01:00
Christian Helmuth
6013889028 depot: update recipe hashes 2018-01-17 12:14:44 +01:00
Norman Feske
80ef5fa73c Enable use of 'check_abi' in build system
This patch invokes the 'check_abi' tool for each shared library that
implements an ABI.

Issue #2639
2018-01-17 12:14:42 +01:00
Christian Helmuth
b7fffb1b24 abi: remove duplicates and internal symbols, fix sizes
The most important part of this patch are symbol-size changes, which
potentially lead to data corruption.

Issue #2639
2018-01-17 12:14:42 +01:00
Norman Feske
c30299feca Increase default warning level
This patch enables the warnings -Wextra, -Weffc++, and -Werror for
compiling Genode components. It thereby helps us to detect bugs like
uninitialized member variables or missing virtual destructors at compile
time. The warning level is defined via the new 'CC_CXX_WARN_STRICT'
variable. For targets that compile 3rd-party code where this warning
level is not applicable, the variable may be explictly set to an empty
value in the corresponding build-description file.

Issue #465
2018-01-17 12:14:35 +01:00
Norman Feske
eba9c15746 Follow practices suggested by "Effective C++"
The patch adjust the code of the base, base-<kernel>, and os repository.
To adapt existing components to fix violations of the best practices
suggested by "Effective C++" as reported by the -Weffc++ compiler
argument. The changes follow the patterns outlined below:

* A class with virtual functions can no longer publicly inherit base
  classed without a vtable. The inherited object may either be moved
  to a member variable, or inherited privately. The latter would be
  used for classes that inherit 'List::Element' or 'Avl_node'. In order
  to enable the 'List' and 'Avl_tree' to access the meta data, the
  'List' must become a friend.

* Instead of adding a virtual destructor to abstract base classes,
  we inherit the new 'Interface' class, which contains a virtual
  destructor. This way, single-line abstract base classes can stay
  as compact as they are now. The 'Interface' utility resides in
  base/include/util/interface.h.

* With the new warnings enabled, all member variables must be explicitly
  initialized. Basic types may be initialized with '='. All other types
  are initialized with braces '{ ... }' or as class initializers. If
  basic types and non-basic types appear in a row, it is nice to only
  use the brace syntax (also for basic types) and align the braces.

* If a class contains pointers as members, it must now also provide a
  copy constructor and assignment operator. In the most cases, one
  would make them private, effectively disallowing the objects to be
  copied. Unfortunately, this warning cannot be fixed be inheriting
  our existing 'Noncopyable' class (the compiler fails to detect that
  the inheriting class cannot be copied and still gives the error).
  For now, we have to manually add declarations for both the copy
  constructor and assignment operator as private class members. Those
  declarations should be prepended with a comment like this:

        /*
         * Noncopyable
         */
        Thread(Thread const &);
        Thread &operator = (Thread const &);

  In the future, we should revisit these places and try to replace
  the pointers with references. In the presence of at least one
  reference member, the compiler would no longer implicitly generate
  a copy constructor. So we could remove the manual declaration.

Issue #465
2018-01-17 12:14:35 +01:00
Norman Feske
2a33d9aa76 pthread: prevent copy of Genode::Thread object
This patch also adjusts virtualbox because it relies on pthread-internal
interfaces.

Fixes #2630
2018-01-17 12:14:34 +01:00
Christian Helmuth
553cf556af depot: update recipe hashes 2017-12-21 15:01:56 +01:00
Emery Hemingway
ed89f2f7f0 Add millisecond accessor to Genode::Duration value object
Add a 'trunc_to_plain_ms' method to Gende::Duration to make
millisecond-accurate timing safer and more convenient.

Ref #2335
2017-12-21 15:01:51 +01:00
Norman Feske
7e3334ca02 core: make region-map verbosity configurable
With this patch, diagnostic messages generated by core's region-map
handling are printed only if the PD session is created with 'diag'
mode enabled.
2017-12-21 15:01:50 +01:00
Alexander Boettcher
15cc6d688f core: add support to export log output as ROM
Issue #2207
2017-12-21 15:01:46 +01:00
Alexander Boettcher
dd463d3014 base: signal ref count independent of signal count 2017-12-21 15:01:40 +01:00
Alexander Boettcher
9e34ba1458 core: release signal context in signal_ep thread
otherwise the Signal_source_component::_signal_queue gets corrupted.

Issue #2584
2017-12-21 15:01:39 +01:00
Alexander Boettcher
bf74c1694d base: catch ipc error in signal proxy
actually do what the comments says ...

Issue #2584
2017-12-21 15:01:39 +01:00
Alexander Boettcher
a38ec2854a base: fix lock issue in signal context destruction
Issue #2584
2017-12-21 15:01:39 +01:00
Martin Stein
fb2398dbf2 run: target-specific config schemata
The run tool now by default checks configurations with target-specific
XML schemata. Each component may define a config schema file in its
target.mk via the CONFIG_XSD variable. When the run tool has checked an
configuration of an init instance, it additionally goes through the
start nodes of the config. For each start node it checks whether there
is an XSD file that matches. If so, the run tool also checks the config
of the start node (if existant). This is done recursively. I.e., also
the child configs of a sub-init of a sub-init of the top-level init
receive a config check.

Issue #2600
2017-12-21 15:01:36 +01:00
Martin Stein
b812179e82 signal: fix race in Signal_receiver pending_signal
In the past, we had the lock of the context we found for the rest of the scope
of pending_signal. Now we use for_each_locked to find the context and the
lock is released as soon as we return from for_each_locked. Thus, we need to
lock the context again before returning it to avoid that the copy constructor
during the return reads values that are currently changing.

Fixes #2532
2017-12-21 15:01:34 +01:00
Christian Helmuth
25ca29002e depot: update recipe hashes 2017-11-30 11:24:49 +01:00
Norman Feske
44977e3519 base: increase initial stack size on x86_64 2017-11-30 11:23:12 +01:00
Alexander Boettcher
19fe5da9be core: use separate signal ep
Fixes #2584
2017-11-30 11:23:11 +01:00
Alexander Boettcher
8bc4389411 core: support to serve signals by another ep
Issue #2584
2017-11-30 11:23:11 +01:00
Martin Stein
e87f63944f timeout: replace Duration operators by methods
void += (Microseconds) -> void add(Microseconds)
void += (Milliseconds) -> void add(Milliseconds)
bool < (Duration)      -> bool less_than(Duration)

Issue #2581
2017-11-30 11:23:09 +01:00
Martin Stein
26bcd439f7 timeout: fix bug in duration + duration testing
The += operator contained bugs. We now also do some tests on the Duration
type at the beginning of the timeout test.

Fixes #2581
2017-11-30 11:23:09 +01:00
Alexander Boettcher
f4aff87e25 make _timer_ticks_to_us 64bit safe
fixes PIT running to fast on seL4 x86_64
2017-11-30 11:23:07 +01:00
Emery Hemingway
caba2d3021 Enforce use of a custom Nim compiler
Use a custom Nim compiler at '/usr/local/genode-nim' that can be built
with a makefile at 'tool/tool_chain_nim'.

Fix #2545
2017-11-30 11:23:06 +01:00
Alexander Boettcher
9c6de44f98 core: use core mem allocator in Pd_session
Fixes #2563
2017-11-30 11:23:05 +01:00
Martin Stein
8e80c05be7 signal: organize signal contexts as ring list
Ref #2532
2017-11-30 11:23:02 +01:00
Alexander Boettcher
44adc3c404 tool: use grub2 instead of grub1 for iso boot
Fixes #2526
2017-11-30 11:23:01 +01:00
Alexander Boettcher
7ff6e96623 base: avoid pagefault if session creation failed 2017-11-24 09:07:32 +01:00
Christian Helmuth
b1c9db8a0d libc: dispatch pending signals at selective points 2017-11-24 09:02:03 +01:00
Christian Helmuth
491be000ca depot: update recipe hashes 2017-11-09 12:19:59 +01:00
Christian Helmuth
1b4128d3d9 Adapt sub_rm test to current Linux 32-bit
As noted above the former enum for the local-attachment address we
discovered address clashes on current Linux installations, esp. 32-bit
runtime on 64-bit Linux. The local_attach_addr is now configurable in
the run script and the memory maps heuristics were removed.
2017-11-06 13:57:23 +01:00
Alexander Boettcher
9655ebbefe sel4: enable nx bit handling for ARM
Issue #1723
2017-11-01 08:39:49 +01:00
Alexander Boettcher
4dd5e6b266 hw: enable nx bit handling for arm 2017-11-01 08:39:49 +01:00
Alexander Boettcher
aa1d5a7dd1 hw: enable nx bit handling for x86_64
Issue #1723
2017-11-01 08:39:48 +01:00
Alexander Boettcher
8ea584b1d2 foc: enable nx bit handling for x86_64 and arm
Issue #1723
2017-11-01 08:39:48 +01:00
Alexander Boettcher
f2c3225ab6 nova: enable nx bit handling for x86_64
Issue #1723
2017-11-01 08:39:48 +01:00
Alexander Boettcher
db329b02b5 base: enable executable memory fault handling
Fixes #1723
2017-11-01 08:39:48 +01:00
Alexander Boettcher
03b8e70d3f rm_fault: add fault test for exec access violation
Issue #1723
2017-10-20 11:45:21 +02:00
Alexander Boettcher
e3d9f41496 base: provide dst fault address for write fault
Issue #1723
2017-10-20 11:45:20 +02:00
Alexander Boettcher
e6dcdcf277 base: attach executable memory as such
- tracing policy

Issue #1723
2017-10-19 13:47:03 +02:00
Christian Helmuth
ee4ee6a8ac depot: update recipe hashes 2017-10-19 13:31:18 +02:00
Stefan Kalkowski
4e97a6511b hw: switch page-tables only when necessary
* Instead of always re-load page-tables when a thread context is switched
  only do this when another user PD's thread is the next target,
  core-threads are always executed within the last PD's page-table set
* remove the concept of the mode transition
* instead map the exception vector once in bootstrap code into kernel's
  memory segment
* when a new page directory is constructed for a user PD, copy over the
  top-level kernel segment entries on RISCV and X86, on ARM we use a designated
  page directory register for the kernel segment
* transfer the current CPU id from bootstrap to core/kernel in a register
  to ease first stack address calculation
* align cpu context member of threads and vms, because of x86 constraints
  regarding the stack-pointer loading
* introduce Align_at template for members with alignment constraints
* let the x86 hardware do part of the context saving in ISS, by passing
  the thread context into the TSS before leaving to user-land
* use one exception vector for all ARM platforms including Arm_v6

Fix #2091
2017-10-19 13:31:18 +02:00
Stefan Kalkowski
ca60e24ad9 hw: run core threads in privileged mode
* introduce new syscall (core-only) to create privileged threads
* take the privilege level of the thread into account
  when doing a context switch
* map kernel segment as accessable for privileged code only

Ref #2091
2017-10-19 13:31:17 +02:00
Stefan Kalkowski
42db1e112b hw: introduce kernel/user address space split
* introduces central memory map for core/kernel
* on 32-bit platforms the kernel/core starts at 0x80000000
* on 64-bit platforms the kernel/core starts at 0xffffffc000000000
* mark kernel/core mappings as global ones (tagged TLB)
* move the exception vector to begin of core's binary,
  thereby bootstrap knows from where to map it appropriately
* do not map boot modules into core anymore
* constrain core's virtual heap memory area
* differentiate in between user's and core's main thread's UTCB,
  which now resides inside the kernel segment

Ref #2091
2017-10-19 13:31:17 +02:00
Christian Helmuth
0da420c104 Limit max string length in log session for okl4
This commit also adds a test to test-log.
2017-10-19 13:31:16 +02:00
Martin Stein
b811ef4331 signal: fix starvation by fast signal contexts
In the past, a signal context, that was chosen for handling by
'Signal_receiver::pending_signal and always triggered again before
the next call of 'pending_signal', caused all other contexts behind
in the list to starve. This was the case because 'pending_signal'
always took the first pending context in its context list.

We avoid this problem now by handling pending signals in a round-robin
fashion instead.

Ref #2532
2017-10-19 13:29:42 +02:00
Christian Helmuth
28004bc9e6 timer: limit rate of handling timeouts
Ensure that the timer does not handle timeouts again within 1000
microseconds after the last handling of timeouts. This makes denial of
service attacks harder. This commit does not limit the rate of timeout
signals handled inside the timer but it causes the timer to do it less
often. If a client continuously installs a very small timeout at the
timer it still causes a signal to be submitted to the timer each time
and some extra CPU time to be spent in the internal handling method. But
only every 1000 microseconds this internal handling causes user timeouts
to trigger.

If we would want to limit also the call of the internal handling method
to ensure that CPU time is spent beside the RPCs only every 1000
microseconds, things would get more complex. For instance, on NOVA
Time_source::schedule_timeout(0) must be called each time a new timeout
gets installed and becomes head of the scheduling queue. We cannot
simply overwrite the already running timeout with the new one.

Ref #2490
2017-10-05 17:40:05 +02:00
Christian Helmuth
170b532892 Support read-only data symbols in ABI
This also adapts existing symbol files
2017-10-05 17:40:04 +02:00
Norman Feske
bea305aec5 depot: avoid rule aliaing in api/base content.mk
This patch merges two similar rules, which create content at 'include'
into a single rule. This prevents a possible race condition when
creating archives in parallel.
2017-10-05 17:40:01 +02:00
Christian Helmuth
ddfd3c0d7e linux: stack-area handling with recent Linux kernels
We moved the stack-area segment 128 MiB behind text and data to comply
with assumptions in the kernel ELF loader.

This commit also reenables static binaries on linux and removes the
unused stack_area.stdlib.ld script.

Fixes #2521
2017-10-05 17:40:00 +02:00
Norman Feske
1d56c3d3aa base: remove non-critical quota messages
In nested scenarios like driver_manager.run, the initial session quota
for IO_PORT, IO_PORT, and IRQ sessions is expectedly insufficient.
However, the condition is properly handled by re-attemping the request
with a slightly increased quota. Still, core prints a warning each time
the request is denied for quota reasons, which spams the log. This patch
removes the non-critical message.
2017-10-05 17:39:57 +02:00
Emery Hemingway
b20b14de27 support for Nim {.compile.} pragma for C sources
Inject bundled C files into build recipes with the Nim {.compile.}
pragma.

Fix #2516
2017-10-05 17:39:56 +02:00
Johannes Kliemann
d3f5a369a7 ada: implemented add in ada
Fixes #2515
2017-10-05 17:39:55 +02:00
Alexander Boettcher
675e2f062a base: increase stack of entrypoint thread in core
Issue #2514
2017-10-05 17:39:55 +02:00
Christian Helmuth
2ed904faab depot: update recipe hashes 2017-08-30 12:41:43 +02:00
Sebastian Sumpf
991a5a5622 ldso: export symbols required by RISC-V
issue #2423
2017-08-30 09:59:59 +02:00
Alexander Boettcher
830f6934f9 base: add support to unconstrain virtual space
Issue #2507.
2017-08-30 09:59:57 +02:00
Alexander Boettcher
cf2886dc8f core: avoid freeing memory of unknown state
This should actually never happen. However if it happens, be a bit robuster
and don't provide the memory for re-use (which causes tons of other trouble
afterwards).

Issue #2505
2017-08-28 16:49:51 +02:00
Josef Söntgen
404a82d5ee register_set: do not shift when ITEM_WIDTH is 64
Issue #2507.
2017-08-28 16:49:50 +02:00
Martin Stein
d9073a1848 timer/util: generic TIMER_MIN_TICKS_PER_MS
Ref #2400
2017-08-28 16:49:50 +02:00
Martin Stein
399e1586be timer: generic timer_ticks_to_us implementation
There are hardware timers whose frequency can't be expressed as
ticks-per-microsecond integer-value because only a ticks-per-millisecond
integer-value is precise enough. We don't want to use expensive
floating-point values here but nonetheless want to translate from ticks
to time with microseconds precision. Thus, we split the input in two and
translate both parts separately. This way, we can raise precision by
shifting the values to their optimal bit position. Afterwards, the results
are shifted back and merged together again.

As this algorithm is not so trivial anymore and used by at least three
timer drivers (base-hw/x86_64, base-hw/cortex_a9, timer/pit), move it to a
generic header to avoid redundancy.

Ref #2400
2017-08-28 16:49:49 +02:00
Christian Prochaska
ee352abc56 run: add Xen support
When building Genode on a Linux system running in a Xen Dom0, the 'xen'
run target can run a Genode scenario in a Xen DomU.

Usage: in build/x86_*/etc/build.conf, define:

RUN_OPT = --include boot_dir/$(KERNEL) --include image/iso --include power_on/xen --include log/xen --include power_off/xen

The Xen DomU runs in HVM mode and loads Genode from an ISO image. Serial
log output is printed to the console and graphical output is shown in an
SDL window.

The Xen DomU ist managed using the 'xl' command line tool and it is
possible to add configuration options in the 'xen_args' variable in a run
script. Common options are:

- disabling the graphical output:

  append xen_args { sdl="0" }

- configuring a network device:

  append xen_args { vif=\["model=e1000,mac=02:00:00:00:01:01,bridge=xenbr0"\] }

- configuring USB input devices:

  append xen_args { usbdevice=\["mouse","keyboard"\] }

Note: the 'xl' tool requires super-user permissions and interactive
password input can be troublesome in combination with 'expect' and is not
practical for automatic tests. For this reason, the current implementation
assumes that no password input is needed when running 'sudo xl', which can
be achieved by creating a file '/etc/sudoers.d/xl' with the content
'user ALL=(root) NOPASSWD: /usr/sbin/xl'
(where 'user' is the Linux user name).

Fixes #2504
2017-08-28 16:49:48 +02:00
Alexander Boettcher
a63eb3cc37 base: don't free initial slab in destructor
Issue #2505
2017-08-28 16:49:46 +02:00
Stefan Kalkowski
ea46c462a4 base: make stack area base specifiable for core
When running core as the kernel inside every component, a separate
stack area for core is needed that is different from the user-land
component's one.

Ref #2091
2017-08-28 16:49:46 +02:00
Stefan Kalkowski
3906568908 util: make bit array and allocator copyable
Ref #2091
2017-08-28 16:49:46 +02:00
Alexander Boettcher
430bde3636 core: remove unmap from rm_client
The flush/unmap of memory is tied to an address space and not to a thread.
Move the handling from the Rm_client to the Adress_space class.

Issue #2209
2017-08-28 16:49:44 +02:00