Commit Graph

2910 Commits

Author SHA1 Message Date
Christian Helmuth f60e2af21f dde_oss: use dde_kit_timer_ticks
The Linux-specific 'jiffies' symbol was removed from dde_kit in 35239b8.

Fixes #1302.
2014-11-28 12:02:37 +01:00
Sebastian Sumpf 038a7999bf ldso: Disallow recursive initialization
Do not support the global construction from of objects from within a global
constructor of another object. This can happen if, for example, dlopen is called
from a global constructor. The construction will be post-boned until the current
constructor has finished.
2014-11-28 12:02:37 +01:00
Martin Stein 09e6c3457f hw_arndale: consider timer resets
On Arndale, the kernel timer resets to the initial value of the last
count-down and continues as soon as it reaches zero. We must check this
via the interrupt status when we read out the timer value and in case
return 0 instead of the real value.

fix #1299
2014-11-28 12:02:37 +01:00
Christian Prochaska 2f5fbe73d3 q5: 'QTime::currentTime()' fix
Fixes #1298
2014-11-28 12:02:37 +01:00
Josef Söntgen 703e3622ff wifi_drv: Port of the Linux wireless stack 2014-11-28 12:02:36 +01:00
Josef Söntgen 2eaa55e6b1 dde_linux: remove base cxx from lxip.mk 2014-11-28 12:02:36 +01:00
Josef Söntgen f127f5c7fc dde_linux: remove base cxx dep from usb.inc 2014-11-28 12:02:36 +01:00
Josef Söntgen 8870539904 dde_linux: clean up lxip patches 2014-11-28 12:02:36 +01:00
Josef Söntgen 338cfaaf9f dde_linux: clean up usb patches 2014-11-28 12:02:36 +01:00
Josef Söntgen 4eda2deeb1 ddekit: remove sleep_forever in dde_kit_debug
The way this function is currently used in dde_linux expects this
function to return. Since there is dde_kit_panic it should better
be used in such a case the output should block.
2014-11-28 12:02:35 +01:00
Josef Söntgen 969cebc659 dde_linux: remove bogus semicolon 2014-11-28 12:02:35 +01:00
Christian Helmuth 58b6c88301 rpi: remove spec for pl011
The Raspberry Pi has only one UART, which is used by core exclusively.
Therefore, the driver server for pl011 should not be built.
2014-11-28 12:02:35 +01:00
Martin Stein b8ba3a7a22 hw: rename Kernel::Processor Kernel::Cpu
Kernel::Processor was a confusing remnant from the old scheme where we had a
Processor_driver (now Genode::Cpu) and a Processor (now Kernel::Cpu).
This commit also updates the in-code documentation and the variable and
function naming accordingly.

fix #1274
2014-11-28 12:02:35 +01:00
Martin Stein b3655902ed hw & arm_v7: provide run/hw_info
The run test 'hw_info' prints the content of the basic ARMv7 identification and
feature registers in a pretty readable format. It is a kernel-internal test
because many of these registers are restricted to privilege level 1 or higher.

fix #1278
2014-11-28 12:02:35 +01:00
Martin Stein 1b1fd1e1f9 hw: add and test totally sophisticated scheduler
The new scheduler serves the orthogonal requirements of both
high-throughput-oriented scheduling contexts (shortly called fill in the
scheduler) and low-latency-oriented scheduling contexts (shortly called
claim in the scheduler). Thus it knows two scheduling modes. Every claim
owns a CPU-time-quota expressed as percentage of a super period
(currently 1 second) and a priority that is absolute as long as the
claim has quota left for the current super period. At the end of a super
period the quota of all claims gets refreshed. During a super period,
the claim mode is dominant as long as any active claim has quota left.
Every time this isn't the case, the scheduler switches to scheduling of
fills. Fills are scheduled in a simple round robin with identical time
slices. Order and time-slices of the fill scheduling are not affected by
the super period. Now on thread creation, two arguments, priority and
quota are needed. If quota is 0, the new thread participates in CPU
scheduling with a fill only.  Otherwise he participates with both a
claim and a fill. This concept dovetails nicely with Genodes quota based
resource management as any process can grant subsets of its own
CPU-time and priorities to its child without knowing the global means of
CPU-time and priority.

The commit also adds a run script that enables an automated unit test of the
scheduler implementation.

fix #1225
2014-11-28 12:02:35 +01:00
Martin Stein a00eb9a66a hw: enhance and test double-list data-structure
To serve the needs of the coming CPU scheduler, the double list needs
additional methods such as 'to_tail' and 'insert_head'.

The commit also adds a run script that enables an automated unit test
of the list implementation.

ref #1225
2014-11-28 12:02:35 +01:00
Martin Stein 0ab5310b8a hw: enable kernel-internal tests via run tool
Kernel tests are done by replacing the implementation of an otherwise
empty function 'Kernel::test' that gets called once at the primary CPU
as soon as all kernel initialization is done. To achieve this, the test
binary that implements 'Kernel::test' must be linked against the core
lib and must then replace the core binary when composing the boot image.
The latter can be done conveniently in a run script by setting the new
argument 'core_type' of the function 'build_boot_image' to the falue
'test'. If no kernel test is needed the argument does not have to be
given - it is set to 'core' by default which results in a "normal"
Genode image.

ref #1225
2014-11-28 12:02:34 +01:00
Martin Stein b3bc9bd549 hw: idle execution context is no thread anymore
Previously, Idle_thread inherited from Thread which caused an extra
processor_pool.h and processor_pool.cc and also made class models for
processor and scheduling more complex. However, this inheritance makes
not much sense anyway as an idle context doesn't trigger most of the code
in Thread.

ref #1225
2014-11-28 12:02:34 +01:00
Martin Stein ec6c19a487 base: memory barriers in lock implementations
The memory barrier prevents the compiler from changing the program order
of memory accesses in such a way that accesses to the guarded resource
get outside the guarded stage. As cmpxchg() defines the start of the
guarded stage it also represents an effective memory barrier.

On x86, the architecture ensures to not reorder writes with older reads,
writes to memory with other writes (except in cases that are not
relevant for our locks), or read/write instructions with I/O
instructions, locked instructions, and serializing instructions.

However on ARM, the architectural memory model allows not only that
memory accesses take local effect in another order as their program
order but also that different observers (components that can access
memory like data-busses, TLBs and branch predictors) observe these
effects each in another order. Thus, a correct program order isn't
sufficient for a correct observation order. An additional architectural
preservation of the memory barrier is needed to achieve this.

Fixes #692
2014-11-28 12:02:34 +01:00
Stefan Kalkowski d452f37c25 hw: print page faults of core (fix #1286) 2014-11-28 12:00:44 +01:00
Alexander Boettcher eedf3fa413 nova: update to r7 branch
Fixes #1297
2014-11-28 12:00:44 +01:00
Alexander Boettcher 4de6d54e50 vmm: tag printf with compiler "printf" attribute
Issue #1296
2014-11-20 17:10:18 +01:00
Alexander Boettcher cdcc4ee60f pthread: support pthread_once
Issue #1296
2014-11-20 17:10:07 +01:00
Alexander Boettcher e6850359e1 rtc: be less verbose
Issue #1296
2014-11-20 17:09:42 +01:00
Christian Helmuth 1a718a7770 prepare_port: log download errors explicitly 2014-11-20 17:06:41 +01:00
Christian Helmuth c3ce1887a2 openssl: fix download location
Issue #1295
2014-11-20 17:05:59 +01:00
Christian Prochaska ac6c4682f3 okl4: declare read-write-lock as volatile
GCC 4.7.4 and newer seems to optimize the lock-variable accesses more
radically, which uncovered the missing volatile qualifier and resulted
in:

Assertion "(int)locked >= 0" failed in file '.../okl4_x86/kernel/include/kernel/read_write_lock.h', line 151 (fn=f0104771)
--- "KD# assert" ---
2014-11-20 16:39:16 +01:00
Sebastian Sumpf 97d117c89d noux: reinitialize Genode::config 2014-11-20 16:39:16 +01:00
Martin Stein 635de1791f hw: fix panda instability on kernel exits
Invalidating all branch predictors before switching the PD
fixes instability problems on Panda and has not much effect
on the performance of other boards. However, we neither know why
this is a fix nor wether it fixes the real cause of the problem.

fix #1294
2014-11-20 16:39:16 +01:00
Stefan Kalkowski 0ffc89ee30 hw: clrex during context switch (Fixes #1196) 2014-11-20 16:39:16 +01:00
Christian Menard eedddeced1 dde_linux: fix bug in find_next_zero_bit_le
value '1' has a default type of int, but long is needed to cover all 64 bits
2014-11-20 16:39:16 +01:00
Christian Prochaska 2583aa2ab4 tool_chain: update GCC to version 4.7.4
Fixes #1051.
2014-11-20 16:39:16 +01:00
Alexander Boettcher 0b194c9689 init: restrict cpu_sessions to configured affinity
Fixes #1289
2014-11-14 12:01:45 +01:00
Martin Stein 8dad54c914 hw: fix scheduler timing on prio preemption
Previously, the timer was used to remember the state of the time slices.
This was sufficient before priorities entered the scene as a thread always
received a fresh time slice when he was scheduled away. However, with
priorities this isn't always the case. A thread can be preempted by another
thread due to a higher priority. In this case the low-priority thread must
remember how much time he has consumed from its current time slice because
the timer gets re-programmed. Otherwise, if we have high-priority threads
that block and unblock with high frequency, the head of the next lower
priority would start with a fresh time slice all the time and is never
superseded.

fix #1287
2014-11-14 12:00:45 +01:00
Christian Prochaska dda8044183 nova: refine the timer delay heuristic
Fixes #1291
2014-11-12 14:49:42 +01:00
Alexander Boettcher 3babee4e19 vbox: support resetting of a VM
Fixes #1290
2014-11-12 14:47:47 +01:00
Christian Prochaska cb51d67c8d vbox: don't enforce instruction emulation after recall event
Fixes #1284
2014-11-12 14:44:17 +01:00
Sebastian Sumpf bc4eab430a lxip: Add loopback device
Fixes #1204
2014-11-12 14:44:17 +01:00
Norman Feske 21f013d2c4 libports/sdl: fix keycode for return key 2014-11-12 14:44:17 +01:00
Norman Feske 620d6c8ab2 rpi: add buffered mode to framebuffer driver 2014-11-12 14:44:17 +01:00
Norman Feske 50ea944789 libports/sdl_image: enable XPM, add include/SDL
Some SDL applications expect the SDL_image headers in include/SDL to be
reachable without the SDL/ prefix. This patch adds the corresponding
search path. Furthermore it enables support for XPM images.
2014-11-12 14:44:17 +01:00
Sebastian Sumpf d426c5e6c2 dde_linux: make drivers self containing
Ported drivers list and extract all needed source files. This decouples
ports according to contrib sources and also enables us to revert lxip to
Linux version 3.9, while staying with 3.14 for usb.

Fixes #1285
2014-11-12 14:44:17 +01:00
Christian Helmuth 2eca4ec98b base: document specifics of Slab::alloc()
Also removed unimplemented overload of alloc() with no parameters.
2014-11-12 14:44:16 +01:00
Christian Helmuth e708bbe2c6 libc: do not zero errno on success in vfs plugin
The manpage to errno tells the following story:

The <errno.h> header file defines the integer variable errno, which is
set by system calls and some library functions in the event of an error
to indicate what went wrong. Its value is significant only when the
return value of the call indicated an error (i.e., -1 from most system
calls; -1 or NULL from most library functions); a function that
succeeds is allowed to change errno.

Valid error numbers are all nonzero; errno is never set to zero by any
system call or library function.
2014-11-12 14:44:16 +01:00
Christian Helmuth 20afccf6ed vfs: use 256-byte buffer in log file system
128 bytes is not much for logging-output line length esp. when also
counting the color sequences of PDBG() and friends.
2014-11-12 14:44:16 +01:00
Christian Helmuth f8dcf76480 dde_kit: panic does not return
The attributes enables to use panic as final statement in branches of
functions declared to return.
2014-11-12 14:44:16 +01:00
Christian Prochaska ac47053b2f vbox: set the 'CPUM_CHANGED_GLOBAL_TLB_FLUSH' flag
Fixes #1281
2014-11-12 14:44:16 +01:00
Christian Prochaska d65826a85d vbox: always transfer FPU ownership back to the VM
When the 'Mtd::FPU' flag is set during the registration of a
virtualization event handler, it must also be set whenever the event
handler returns.

Fixes #1283
2014-11-12 14:44:16 +01:00
Christian Prochaska e3fa8c9f22 vbox: save the guest FPU state before 'longjmp()'
'longjmp()' restores the (partial) FPU state saved by 'setjmp()', so it's
necessary to save the guest FPU state before calling 'longjmp()'.

Fixes #1282
2014-11-12 14:44:16 +01:00
Norman Feske 6afba00ad6 okl4: fix success condition in priority test 2014-11-12 14:44:16 +01:00