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close #2211
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The TLS section symbols had wrong values in case of an empty TLS data
section and a nonempty TLS BSS section.
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Instead of SPRG0 (= special purpose register 272) use the new global
symbol _PPC_INTERRUPT_DISABLE_MASK to store the interrupt disable mask.
The benefit is that it is now possible to disable interrupts without
further run-time initialization in boot_card().
At least on Freescale e500 cores this leads also to a faster execution
since the mfmsr and mfspr instruction require four cycles to complete.
The instructions to load the mask value can execute while the mfmsr is
in progress.
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Add a CPU counter interface to allow access to a free-running counter.
It is useful to measure short time intervals. This can be used for
example to enable profiling of critical low-level functions.
Add two busy wait functions rtems_counter_delay_ticks() and
rtems_counter_delay_nanoseconds() implemented via the CPU counter.
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The work areas (RTEMS work space and C program heap) will be initialized
now in a separate step and are no longer part of
rtems_initialize_data_structures(). Initialization is performed with
tables of Heap_Area entries. This allows usage of scattered memory
areas present on various small scale micro-controllers.
The sbrk() support API changes also. The bsp_sbrk_init() must now deal
with a minimum size for the first memory chunk to take the configured
work space size into account.
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Replace the "NIRVANA" region with the more verbose "UNEXPECTED_SECTIONS"
region. Move the region definition into the "linkcmds.base" files.
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Script does what is expected and tries to do it as
smartly as possible.
+ remove occurrences of two blank comment lines
next to each other after Id string line removed.
+ remove entire comment blocks which only exited to
contain CVS Ids
+ If the processing left a blank line at the top of
a file, it was removed.
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The clock driver used previously the bsp_clicks_per_usec value. For a
33333333Hz time base frequency this leads to a relative error of one per
cent for example due to integer truncation.
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* configure.ac, startup/bspstart.c: Use standard cache BSP options.
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PR 1435/bsps
* Makefile.am: Use shared implementation of bsp_idle_thread().
* startup/bspidle.c: Removed.
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* Makefile.am, startup/bspstart.c: Rename BSP specific idle thread to
bsp_idle_thread and split into its own file.
* startup/bspidle.c: New file.
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* startup/bspgetworkarea.c: Switch from ssize_t to uintptr_t for
bsp_get_work_area() since the work area is larger than a single
allocatable object.
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* startup/start.S: Update for boot_card command line change.
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* startup/bspstart.c: Change prototype of IDLE thread to consistently
return void * and take a uintptr_t argument.
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* startup/bspgetworkarea.c: Change size_t to ssize_t on
bsp_get_work_area(). On 16-bit architectures, size_t can be 16-bits
which would limit the work area to 64K.
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* Makefile.am, startup/bspstart.c: Split out bsp_get_work_area() into
its own file and use BSP Framework to perform more initialization.
* startup/bspgetworkarea.c: New file.
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added port init, added phy support
init mmu
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