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authorJoel Sherrill <joel.sherrill@OARcorp.com>2002-03-29 14:22:13 +0000
committerJoel Sherrill <joel.sherrill@OARcorp.com>2002-03-29 14:22:13 +0000
commit82e1e997cac695532f8382cee94d770cc7fb59ec (patch)
tree416ab51694049ef2811ad132354f4e7db139f83c /c/src/lib/libcpu/sparc/tbr/tbr.h
parent8c1756e40af556eeccd2c6a04c9c44484b93b528 (diff)
downloadrtems-82e1e997cac695532f8382cee94d770cc7fb59ec.tar.bz2
2002-03-28 Ralf Corsepius <corsepiu@faw.uni-ulm.de>
* tbr/Makefile.am: New file. * tbr/.cvsignore: New file. * tbr/tbr.c: New file. * tbr/tbr.h: New file. * configure.ac: Add tbr subdir. * Makefile.am: Add tbr subdir.
Diffstat (limited to '')
-rw-r--r--c/src/lib/libcpu/sparc/tbr/tbr.h40
1 files changed, 40 insertions, 0 deletions
diff --git a/c/src/lib/libcpu/sparc/tbr/tbr.h b/c/src/lib/libcpu/sparc/tbr/tbr.h
new file mode 100644
index 0000000000..45ffed28bd
--- /dev/null
+++ b/c/src/lib/libcpu/sparc/tbr/tbr.h
@@ -0,0 +1,40 @@
+/*
+ * SPARC Dependent Source
+ *
+ * COPYRIGHT (c) 1989-1999.
+ * On-Line Applications Research Corporation (OAR).
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.OARcorp.com/rtems/license.html.
+ *
+ * $Id$
+ */
+
+/*
+ * This is the executive's trap table which is installed into the TBR
+ * register.
+ *
+ * NOTE: Unfortunately, this must be aligned on a 4096 byte boundary.
+ * The GNU tools as of binutils 2.5.2 and gcc 2.7.0 would not
+ * align an entity to anything greater than a 512 byte boundary.
+ *
+ * Because of this, we pull a little bit of a trick. We allocate
+ * enough memory so we can grab an address on a 4096 byte boundary
+ * from this area.
+ */
+
+#ifndef _libcpu_tbr_h
+#define _libcpu_tbr_h
+
+#include <bsp.h>
+
+#ifndef NO_TABLE_MOVE
+
+#define SPARC_TRAP_TABLE_ALIGNMENT 4096
+
+SCORE_EXTERN unsigned8 _CPU_Trap_Table_area[8192]
+ __attribute__ ((aligned (SPARC_TRAP_TABLE_ALIGNMENT)));
+#endif
+
+#endif