diff options
Diffstat (limited to 'c/src/lib/libbsp/powerpc/shared/startup/pgtbl_setup.c')
| -rw-r--r-- | c/src/lib/libbsp/powerpc/shared/startup/pgtbl_setup.c | 135 |
1 files changed, 0 insertions, 135 deletions
diff --git a/c/src/lib/libbsp/powerpc/shared/startup/pgtbl_setup.c b/c/src/lib/libbsp/powerpc/shared/startup/pgtbl_setup.c deleted file mode 100644 index 8a8407bd49..0000000000 --- a/c/src/lib/libbsp/powerpc/shared/startup/pgtbl_setup.c +++ /dev/null @@ -1,135 +0,0 @@ -#include <rtems.h> -#include <libcpu/mmu.h> -#include <rtems/bspIo.h> -#include <libcpu/pte121.h> - -/* Default setup of the page tables. This is a weak - * alias, so applications may easily override this - * default setup. - * - * NOTE: while it is possible to change the individual - * mappings, the page table itself MUST be - * allocated at the top of the physical memory! - * bspstart.c RELIES on this. - * Also, the 'setup' routine must reduce - * *pmemsize by the size of the page table. - */ -/* to align the pointer to the (next) page boundary */ -#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) - - -/* - * 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 - */ - -Triv121PgTbl __BSP_default_pgtbl_setup(unsigned int *pmemsize); -Triv121PgTbl BSP_pgtbl_setup(unsigned int *) - __attribute__ (( weak, alias("__BSP_default_pgtbl_setup") )); - -/* get those from the linker script. - * NOTE THAT THE CORRECTNESS OF THE LINKER SCRIPT IS CRUCIAL - */ -extern unsigned long __DATA_START__[], _etext[]; - -Triv121PgTbl -__BSP_default_pgtbl_setup(unsigned int *pmemsize) -{ -Triv121PgTbl pt; -unsigned ldPtSize,tmp; - - /* Allocate a page table large enough to map - * the entire physical memory. We put the page - * table at the top of the physical memory. - */ - - /* get minimal size (log base 2) of PT for - * this board's memory - */ - ldPtSize = triv121PgTblLdMinSize(*pmemsize); - ldPtSize++; /* double this amount -- then why? */ - - /* allocate the page table at the top of the physical - * memory - THIS IS NOT AN OPTION - bspstart.c RELIES - * ON THIS LAYOUT! (the size, however may be changed) - */ - if ( (pt = triv121PgTblInit(*pmemsize - (1<<ldPtSize), ldPtSize)) ) { - /* map text and RO data read-only */ - tmp = triv121PgTblMap( - pt, - TRIV121_121_VSID, - 0, - (PAGE_ALIGN((unsigned long)_etext) - 0) >> PG_SHIFT, - 0, /* WIMG */ - TRIV121_PP_RO_PAGE); - if (TRIV121_MAP_SUCCESS != tmp) { - printk("Unable to map page index %i; reverting to BAT0\n", - tmp); - pt = 0; - } else { - /* map the rest (without the page table itself) RW */ - tmp = triv121PgTblMap( - pt, - TRIV121_121_VSID, - (unsigned long)__DATA_START__, - (*pmemsize - (1<<ldPtSize) - (unsigned long)__DATA_START__ )>> PG_SHIFT, - 0, /* WIMG */ - TRIV121_PP_RW_PAGE); - if (TRIV121_MAP_SUCCESS != tmp) { - printk("Unable to map page index %i; reverting to BAT0\n", - tmp); - pt = 0; - } - } - } else { - printk("WARNING: unable to allocate page table, keeping DBAT0\n"); - } - if (pt) { -#ifdef SHOW_MORE_INIT_SETTINGS - printk("Setting up page table mappings; protecting text/read-only data from write access\n"); -#endif - /* SUCCESS; reduce available memory by size of the page table */ - *pmemsize -= (1<<ldPtSize); - } - return pt; -} |