diff options
Diffstat (limited to 'sys/amd64')
| -rw-r--r-- | sys/amd64/amd64/pmap.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/sys/amd64/amd64/pmap.c b/sys/amd64/amd64/pmap.c index aa38013..4777c08 100644 --- a/sys/amd64/amd64/pmap.c +++ b/sys/amd64/amd64/pmap.c @@ -4272,6 +4272,30 @@ pmap_copy_page(vm_page_t msrc, vm_page_t mdst) pagecopy((void *)src, (void *)dst); } +void +pmap_copy_pages(vm_page_t ma[], vm_offset_t a_offset, vm_page_t mb[], + vm_offset_t b_offset, int xfersize) +{ + void *a_cp, *b_cp; + vm_offset_t a_pg_offset, b_pg_offset; + int cnt; + + while (xfersize > 0) { + a_pg_offset = a_offset & PAGE_MASK; + cnt = min(xfersize, PAGE_SIZE - a_pg_offset); + a_cp = (char *)PHYS_TO_DMAP(ma[a_offset >> PAGE_SHIFT]-> + phys_addr) + a_pg_offset; + b_pg_offset = b_offset & PAGE_MASK; + cnt = min(cnt, PAGE_SIZE - b_pg_offset); + b_cp = (char *)PHYS_TO_DMAP(mb[b_offset >> PAGE_SHIFT]-> + phys_addr) + b_pg_offset; + bcopy(a_cp, b_cp, cnt); + a_offset += cnt; + b_offset += cnt; + xfersize -= cnt; + } +} + /* * Returns true if the pmap's pv is one of the first * 16 pvs linked to from this page. This count may |
