- /* get pointer to global configuration */
- config = rte_eal_get_configuration();
-
- ms = rte_eal_get_physmem_layout();
-
- addr_offset = 0;
-
- for (memseg_idx = 0; memseg_idx < RTE_MAX_MEMSEG; memseg_idx++){
-
- /* ignore smaller memsegs as they can only get smaller */
- if (ms[memseg_idx].len < maxlen)
- continue;
-
- /* align everything */
- last_addr = RTE_PTR_ALIGN_CEIL(ms[memseg_idx].addr, RTE_CACHE_LINE_SIZE);
- len = ms[memseg_idx].len - RTE_PTR_DIFF(last_addr, ms[memseg_idx].addr);
- len &= ~((size_t) RTE_CACHE_LINE_MASK);
-
- /* cycle through all memzones */
- for (memzone_idx = 0; memzone_idx < RTE_MAX_MEMZONE; memzone_idx++) {
-
- /* stop when reaching last allocated memzone */
- if (config->mem_config->memzone[memzone_idx].addr == NULL)
- break;
-
- /* check if the memzone is in our memseg and subtract length */
- if ((config->mem_config->memzone[memzone_idx].addr >=
- ms[memseg_idx].addr) &&
- (config->mem_config->memzone[memzone_idx].addr <
- (RTE_PTR_ADD(ms[memseg_idx].addr, ms[memseg_idx].len)))) {
- /* since the zones can now be aligned and occasionally skip
- * some space, we should calculate the length based on
- * reported length and start addresses difference.
- */
- len -= (uintptr_t) RTE_PTR_SUB(
- config->mem_config->memzone[memzone_idx].addr,
- (uintptr_t) last_addr);
- len -= config->mem_config->memzone[memzone_idx].len;
- last_addr =
- RTE_PTR_ADD(config->mem_config->memzone[memzone_idx].addr,
- (size_t) config->mem_config->memzone[memzone_idx].len);
- }
- }
-
- /* make sure we get the alignment offset */
- if (len > maxlen) {
- addr_offset = RTE_PTR_ALIGN_CEIL((uintptr_t) last_addr, align) - (uintptr_t) last_addr;
- maxlen = len;
- }
- }