167     /* Exchange buffer */
622         uint8_t *exchange;  in read_erst_record()  local
625         /* Obtain pointer to the exchange buffer */  in read_erst_record()
626         exchange = memory_region_get_ram_ptr(&s->exchange_mr);  in read_erst_record()
627         exchange += s->record_offset;  in read_erst_record()
641         /* If all is ok, copy the record to the exchange buffer */  in read_erst_record()
643             memcpy(exchange, nvram, record_length);  in read_erst_record()
665     uint8_t *exchange;  in write_erst_record()  local
676     /* Obtain pointer to record in the exchange buffer */  in write_erst_record()
677     exchange = memory_region_get_ram_ptr(&s->exchange_mr);  in write_erst_record()
678     exchange += s->record_offset;  in write_erst_record()
681     memcpy((uint8_t *)&record_length, &exchange[UEFI_CPER_RECORD_LENGTH_OFFSET],  in write_erst_record()
692     memcpy((uint8_t *)&record_identifier, &exchange[UEFI_CPER_RECORD_ID_OFFSET],  in write_erst_record()
718         memcpy(nvram, exchange, record_length);  in write_erst_record()
983     /* BAR 1: Exchange buffer memory */  in erst_realizefn()
985                             "erst.exchange",  in erst_realizefn()