kernel/x86: Reimplement locking for early boot message output.

The normal locking uses spinlocks that require getting at the current
CPU, which in turn needs a current thread set. This has not been set up
at this point and would simply cause tripple faults.

Use manual locking using atomic ops instead.

Change-Id: Ica894389330ef481eec84b667234139746ac4a46
Reviewed-on: https://review.haiku-os.org/808
Reviewed-by: waddlesplash <waddlesplash@gmail.com>

Actually use the serial port and speed from the kernel settings

Turns out we just reused the already set values, disregarding the new ones.

kernel: Rework cpuidle module

* Create new interface for cpuidle modules (similar to the cpufreq
interface)
* Generic cpuidle module is no longer needed
* Fix and update Intel C-State module

arch_debug_serial_[try_]getchar(): Look at the line status we read a bit closer
before assuming we have data. If the I/O port isn't valid (e.g. because there
is no serial port) 0xff seems to be a typical value to read. In that case fail.
Fixes KDL input on machines without serial port -- kgetc() would always think
it read something from the serial port, never trying any other input.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42153 a95241bf-73f2-0310-859d-f6bbb57e9c96

Small refactoring: Moved serial port initialization to helper function.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42150 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added arch_debug_blue_screen_try_getchar() and arch_debug_serial_try_getchar()
which don't wait for a character, but return -1 when no character is
available ATM. Implemented correctly for x86 only.
* Changed the semantics of the debugger_module_info::debugger_getchar() hook.
It is supposed to return immediately now.
* Adjusted usb_keyboard accordingly. Hacked UHCI's debug_process_transfer() to
achieve that. It does now start, check, or cancel a transfer. Split
UHCI::ProcessDebugTransfer() into StartDebugTransfer(), and
CheckDebugTransfer() accordingly, and also added a CancelDebugTransfer().
The latter seems to have issues. Michael, please have a look. I have no clue
what I'm doing. :-)
* Adjusted kgetc() to poll all possible inputs using the new
functions/semantics. This allows to use any input (USB, PS/2, serial) in KDL.
* Removed the no longer needed "serial_input" command.
* read_line(): Also support 0x7f as backspace code. That's what xterm sends.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42126 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Prefixed the INCLUDE_GPL_ADDONS variable by "HAIKU_". configure needs to
be run again or generated/build/BuildConfig needs to be adjusted manually.
* Removed bochs debug hack.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34721 a95241bf-73f2-0310-859d-f6bbb57e9c96

*.c -> *.cpp


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34417 a95241bf-73f2-0310-859d-f6bbb57e9c96

kernel: Rework cpuidle module

* Create new interface for cpuidle modules (similar to the cpufreq
interface)
* Generic cpuidle module is no longer needed
* Fix and update Intel C-State module

arch_debug_serial_[try_]getchar(): Look at the line status we read a bit closer
before assuming we have data. If the I/O port isn't valid (e.g. because there
is no serial port) 0xff seems to be a typical value to read. In that case fail.
Fixes KDL input on machines without serial port -- kgetc() would always think
it read something from the serial port, never trying any other input.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42153 a95241bf-73f2-0310-859d-f6bbb57e9c96

Small refactoring: Moved serial port initialization to helper function.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42150 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added arch_debug_blue_screen_try_getchar() and arch_debug_serial_try_getchar()
which don't wait for a character, but return -1 when no character is
available ATM. Implemented correctly for x86 only.
* Changed the semantics of the debugger_module_info::debugger_getchar() hook.
It is supposed to return immediately now.
* Adjusted usb_keyboard accordingly. Hacked UHCI's debug_process_transfer() to
achieve that. It does now start, check, or cancel a transfer. Split
UHCI::ProcessDebugTransfer() into StartDebugTransfer(), and
CheckDebugTransfer() accordingly, and also added a CancelDebugTransfer().
The latter seems to have issues. Michael, please have a look. I have no clue
what I'm doing. :-)
* Adjusted kgetc() to poll all possible inputs using the new
functions/semantics. This allows to use any input (USB, PS/2, serial) in KDL.
* Removed the no longer needed "serial_input" command.
* read_line(): Also support 0x7f as backspace code. That's what xterm sends.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42126 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Prefixed the INCLUDE_GPL_ADDONS variable by "HAIKU_". configure needs to
be run again or generated/build/BuildConfig needs to be adjusted manually.
* Removed bochs debug hack.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34721 a95241bf-73f2-0310-859d-f6bbb57e9c96

*.c -> *.cpp


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34417 a95241bf-73f2-0310-859d-f6bbb57e9c96