source: rtems/c/src/lib/libbsp/powerpc/mvme5500/startup/pgtbl_activate.c @ ac7af4a

/* pgtbl_activate.c,v 1.1.2.1 2003/02/20 21:45:49 joel Exp */

#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.
 */

/* Author: Till Straumann, <strauman@slac.stanford.edu>, 4/2002
 * Kate Feng <feng1@bnl.gov> ported it to MVME5500, 4/2004
 */

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 & DBAT1 */
        setdbat(0,0,0,0,0);
        setdbat(1,0,0,0,0);  /* <skf> */
        /* At this point, DBAT0 is available for other use... */
}