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authorSebastian Huber <sebastian.huber@embedded-brains.de>2019-12-13 06:18:36 +0100
committerSebastian Huber <sebastian.huber@embedded-brains.de>2020-02-04 06:06:41 +0100
commiteea21eaca117ecd98afea164e1808d6530ef487f (patch)
treeca4e15da28b71a5ecca5fc357798261a39b3f250 /cpukit/sapi/src
parentbsps: Remove uses of BSP_GET_WORK_AREA_DEBUG (diff)
downloadrtems-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.c13
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)
{
/*