Update of /cvsroot/linux-vax/kernel-2.4/arch/vax/mm
In directory usw-pr-cvs1:/tmp/cvs-serv29098/arch/vax/mm
Modified Files:
init.c
Log Message:
DA: moved remap_and_clear_pte_page around it now allocates a page of S0
space to put P0/P1 ptes into .. it clears the page ..
it is called from pte_alloc ..
not sure if this was the right place to do this .. but it look as good as
any ...
Index: init.c
===================================================================
RCS file: /cvsroot/linux-vax/kernel-2.4/arch/vax/mm/init.c,v
retrieving revision 1.8
retrieving revision 1.9
diff -u -r1.8 -r1.9
--- init.c 2001/02/18 16:42:45 1.8
+++ init.c 2001/05/19 12:12:02 1.9
@@ -138,25 +138,37 @@
/* remap a given page to be part of a contiguous page table for p0/1 space */
void remap_and_clear_pte_page(pgd_t *pagetable, pte_t *page, unsigned long pte_page)
{
- unsigned long page_physical_address, page_virtual_address;
+ unsigned long page_physical_address, page_virtual_address, page_s0_address;
pte_t *S0pte;
pte_t tpte;
-
- /* zero out these pte's */
- clear_page((void *) page);
-
- /* page addresses */
- page_physical_address = __pa(page);
- page_virtual_address = (pte_page * PAGE_SIZE) + pagetable->br;
-
- /* S0 pte entry for this virtual address */
- S0pte = ((page_virtual_address - PAGE_OFFSET) >> PAGE_SHIFT)+swapper_pg_dir;
+ pte_t *newpage;
+ pgd_t *sys_pgd = swapper_pg_dir+2;
+ /* address in S0 space is page pointer */
+ /* find the entry in the SPTE corresponding to this page */
- /* FIXME: what if the page is already mapped? (TASK_SIZE) */
- pte_clear(S0pte);
- tpte = mk_pte_phys((void*)page_physical_address,(pgprot_t)PAGE_KERNEL);
- set_pte(S0pte, tpte);
+ S0pte = (pte_t *)((__pa(page) >> PAGELET_SHIFT)+sys_pgd->br);
+ printk("remap: virt addr %p, pteval %8lX , S0pte %p, %8lX\n", page, pte_val(*page), S0pte, pte_val(*S0pte));
+
+ printk("empty_zero_page %p %8lX\n", &empty_zero_page, __pa(&empty_zero_page)>>PAGELET_SHIFT);
+ if (!pte_present(*S0pte))
+ {
+ unsigned long phy_addr;
+ pgd_t *ret = (pgd_t *)__get_free_page(GFP_KERNEL);
+ /* we have address in S0 of free page */
+ /* need to remap this free page to the address in S0 where we are */
+ /* Get the phy address of the page */
+ //spte = pte_offset(sys_pgd, ((unsigned long)ret - PAGE_OFFSET));
+ clear_page((void *)ret);
+ pte_clear(S0pte);
+ tpte = mk_pte((void *)ret, (pgprot_t)PAGE_KERNEL);
+
+ set_pte(S0pte, tpte);
+ /* grab a free page */
+ printk("S0 page invalid, %p %8lX\n", ret, pte_val(tpte));
+ return;
+ }
+ /* zero out these pte's */
+ // clear_page((void *) page);
return;
}
-
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