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author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2019-12-13 06:18:36 +0100 |
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committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2020-02-04 06:06:41 +0100 |
commit | eea21eaca117ecd98afea164e1808d6530ef487f (patch) | |
tree | ca4e15da28b71a5ecca5fc357798261a39b3f250 /cpukit/sapi/src | |
parent | bsps: Remove uses of BSP_GET_WORK_AREA_DEBUG (diff) | |
download | rtems-eea21eaca117ecd98afea164e1808d6530ef487f.tar.bz2 |
bsps: Rework work area initialization
The work area initialization was done by the BSP through
bsp_work_area_initialize(). This approach predated the system
initialization through the system initialization linker set. The
workspace and C program heap were unconditionally initialized. The aim
is to support RTEMS application configurations which do not need the
workspace and C program heap. In these configurations, the workspace
and C prgram heap should not get initialized.
Change all bsp_work_area_initialize() to implement _Memory_Get()
instead. Move the dirty memory, sbrk(), per-CPU data, workspace, and
malloc() heap initialization into separate system initialization steps.
This makes it also easier to test the individual initialization steps.
This change adds a dependency to _Heap_Extend() to all BSPs. This
dependency will be removed in a follow up change.
Update #3838.
Diffstat (limited to 'cpukit/sapi/src')
-rw-r--r-- | cpukit/sapi/src/exinit.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/cpukit/sapi/src/exinit.c b/cpukit/sapi/src/exinit.c index 54e44515d3..196c9be576 100644 --- a/cpukit/sapi/src/exinit.c +++ b/cpukit/sapi/src/exinit.c @@ -30,6 +30,7 @@ #include <rtems/score/heap.h> #include <rtems/score/interr.h> #include <rtems/score/isr.h> +#include <rtems/score/percpudata.h> #include <rtems/score/priority.h> #include <rtems/score/schedulerimpl.h> #include <rtems/score/smpimpl.h> @@ -57,6 +58,18 @@ _Objects_Information_table[ OBJECTS_APIS_LAST + 1 ] = { &_POSIX_Objects[ 0 ] }; +RTEMS_LINKER_RWSET( + _Per_CPU_Data, +#if defined(RTEMS_SMP) + /* + * In SMP configurations, prevent false cache line sharing of per-processor + * data with a proper alignment. + */ + RTEMS_ALIGNED( CPU_CACHE_LINE_BYTES ) +#endif + char +); + static void rtems_initialize_data_structures(void) { /* |