DL
в async надо использовать
у нас даже был модуль ядра
aio, но никто не знал, что он делает+void
+pmap_copy_pages(vm_page_t ma[], vm_offset_t a_offset, vm_page_t mb[],
+ vm_offset_t b_offset, int xfersize)
+{
+ struct sysmaps *sysmaps;
+ vm_page_t a_pg, b_pg;
+ char *a_cp, *b_cp;
+ vm_offset_t a_pg_offset, b_pg_offset;
+ int cnt;
+
+ sysmaps = &sysmaps_pcpu[PCPU_GET(cpuid)];
+ mtx_lock(&sysmaps->lock);
+ if (*sysmaps->CMAP1)
+ panic("pmap_copy_page: CMAP1 busy");
+ if (*sysmaps->CMAP2)
+ panic("pmap_copy_page: CMAP2 busy");
+ sched_pin();
+ while (xfersize > 0) {
+ invlpg((u_int)sysmaps->CADDR1);
+ invlpg((u_int)sysmaps->CADDR2);
+ a_pg = ma[a_offset >> PAGE_SHIFT];
+ a_pg_offset = a_offset & PAGE_MASK;
+ cnt = min(xfersize, PAGE_SIZE - a_pg_offset);
+ b_pg = mb[b_offset >> PAGE_SHIFT];
+ b_pg_offset = b_offset & PAGE_MASK;
+ cnt = min(cnt, PAGE_SIZE - b_pg_offset);
+ *sysmaps->CMAP1 = PG_V | VM_PAGE_TO_PHYS(a_pg) | PG_A |
+ pmap_cache_bits(b_pg->md.pat_mode, 0);
+ *sysmaps->CMAP2 = PG_V | PG_RW | VM_PAGE_TO_PHYS(b_pg) | PG_A |
+ PG_M | pmap_cache_bits(b_pg->md.pat_mode, 0);
+ a_cp = sysmaps->CADDR1 + a_pg_offset;
+ b_cp = sysmaps->CADDR2 + b_pg_offset;
+ bcopy(a_cp, b_cp, cnt);
+ *sysmaps->CMAP1 = 0;
+ *sysmaps->CMAP2 = 0;
+ a_offset += cnt;
+ b_offset += cnt;
+ xfersize -= cnt;
+ }
+ mtx_unlock(&sysmaps->lock);
+}
+