diff options
Diffstat (limited to 'sys/i386/xen')
| -rw-r--r-- | sys/i386/xen/pmap.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/sys/i386/xen/pmap.c b/sys/i386/xen/pmap.c index 3c7c3f5..0f7a80f 100644 --- a/sys/i386/xen/pmap.c +++ b/sys/i386/xen/pmap.c @@ -3448,6 +3448,46 @@ pmap_copy_page(vm_page_t src, vm_page_t dst) mtx_unlock(&sysmaps->lock); } +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 != 0) + panic("pmap_copy_pages: CMAP1 busy"); + if (*sysmaps->CMAP2 != 0) + panic("pmap_copy_pages: CMAP2 busy"); + sched_pin(); + while (xfersize > 0) { + 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); + PT_SET_MA(sysmaps->CADDR1, PG_V | VM_PAGE_TO_MACH(a_pg) | PG_A); + PT_SET_MA(sysmaps->CADDR2, PG_V | PG_RW | + VM_PAGE_TO_MACH(b_pg) | PG_A | PG_M); + a_cp = sysmaps->CADDR1 + a_pg_offset; + b_cp = sysmaps->CADDR2 + b_pg_offset; + bcopy(a_cp, b_cp, cnt); + a_offset += cnt; + b_offset += cnt; + xfersize -= cnt; + } + PT_SET_MA(sysmaps->CADDR1, 0); + PT_SET_MA(sysmaps->CADDR2, 0); + sched_unpin(); + mtx_unlock(&sysmaps->lock); +} + /* * Returns true if the pmap's pv is one of the first * 16 pvs linked to from this page. This count may |
