diff options
Diffstat (limited to 'bsps/powerpc/shared/start/pgtbl_activate.c')
| -rw-r--r-- | bsps/powerpc/shared/start/pgtbl_activate.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/bsps/powerpc/shared/start/pgtbl_activate.c b/bsps/powerpc/shared/start/pgtbl_activate.c new file mode 100644 index 0000000000..2455f1e06d --- /dev/null +++ b/bsps/powerpc/shared/start/pgtbl_activate.c @@ -0,0 +1,77 @@ +#include <rtems.h> +#include <libcpu/pte121.h> +#include <libcpu/bat.h> + +/* Default activation of the page tables. This is a weak + * alias, so applications may easily override this + * default activation procedure. + */ + +/* + * Authorship + * ---------- + * This software was created by + * Till Straumann <strauman@slac.stanford.edu>, 4/2002, + * Stanford Linear Accelerator Center, Stanford University. + * + * Acknowledgement of sponsorship + * ------------------------------ + * This software was produced by + * the Stanford Linear Accelerator Center, Stanford University, + * under Contract DE-AC03-76SFO0515 with the Department of Energy. + * + * Government disclaimer of liability + * ---------------------------------- + * Neither the United States nor the United States Department of Energy, + * nor any of their employees, makes any warranty, express or implied, or + * assumes any legal liability or responsibility for the accuracy, + * completeness, or usefulness of any data, apparatus, product, or process + * disclosed, or represents that its use would not infringe privately owned + * rights. + * + * Stanford disclaimer of liability + * -------------------------------- + * Stanford University makes no representations or warranties, express or + * implied, nor assumes any liability for the use of this software. + * + * Stanford disclaimer of copyright + * -------------------------------- + * Stanford University, owner of the copyright, hereby disclaims its + * copyright and all other rights in this software. Hence, anyone may + * freely use it for any purpose without restriction. + * + * Maintenance of notices + * ---------------------- + * In the interest of clarity regarding the origin and status of this + * SLAC software, this and all the preceding Stanford University notices + * are to remain affixed to any copy or derivative of this software made + * or distributed by the recipient and are to be affixed to any copy of + * software made or distributed by the recipient that contains a copy or + * derivative of this software. + * + * ------------------ SLAC Software Notices, Set 4 OTT.002a, 2004 FEB 03 + */ + +void __BSP_default_pgtbl_activate(Triv121PgTbl pt); +void +BSP_pgtbl_activate(Triv121PgTbl) + __attribute__ (( weak, alias("__BSP_default_pgtbl_activate") )); + +void +__BSP_default_pgtbl_activate(Triv121PgTbl pt) +{ + if (!pt) return; + + /* switch the text/ro sements to RO only after + * initializing the interrupts because the irq_mng + * installs some code... + * + * activate the page table; it is still masked by the + * DBAT0, however + */ + triv121PgTblActivate(pt); + + /* finally, switch off DBAT0 */ + setdbat(0,0,0,0,0); + /* At this point, DBAT0 is available for other use... */ +} |