- if (address_index == mapcache->last_address_index && !lock) {
- trace_qemu_map_cache_return(mapcache->last_address_vaddr + address_offset);
- return mapcache->last_address_vaddr + address_offset;
+ trace_xen_map_cache(phys_addr);
+
+ /* __test_bit_size is always a multiple of XC_PAGE_SIZE */
+ if (size) {
+ __test_bit_size = size + (phys_addr & (XC_PAGE_SIZE - 1));
+
+ if (__test_bit_size % XC_PAGE_SIZE) {
+ __test_bit_size += XC_PAGE_SIZE - (__test_bit_size % XC_PAGE_SIZE);
+ }
+ } else {
+ __test_bit_size = XC_PAGE_SIZE;
+ }
+
+ if (mapcache->last_entry != NULL &&
+ mapcache->last_entry->paddr_index == address_index &&
+ !lock && !__size &&
+ test_bits(address_offset >> XC_PAGE_SHIFT,
+ __test_bit_size >> XC_PAGE_SHIFT,
+ mapcache->last_entry->valid_mapping)) {
+ trace_xen_map_cache_return(mapcache->last_entry->vaddr_base + address_offset);
+ return mapcache->last_entry->vaddr_base + address_offset;
+ }
+
+ /* size is always a multiple of MCACHE_BUCKET_SIZE */
+ if (size) {
+ __size = size + address_offset;
+ if (__size % MCACHE_BUCKET_SIZE) {
+ __size += MCACHE_BUCKET_SIZE - (__size % MCACHE_BUCKET_SIZE);
+ }
+ } else {
+ __size = MCACHE_BUCKET_SIZE;