1 // SPDX-License-Identifier: Zlib 2 /* dfltcc.c - SystemZ DEFLATE CONVERSION CALL support. */ 3 4 #include <linux/zutil.h> 5 #include "dfltcc_util.h" 6 #include "dfltcc.h" 7 8 char *oesc_msg( 9 char *buf, 10 int oesc 11 ) 12 { 13 if (oesc == 0x00) 14 return NULL; /* Successful completion */ 15 else { 16 #ifdef STATIC 17 return NULL; /* Ignore for pre-boot decompressor */ 18 #else 19 sprintf(buf, "Operation-Ending-Supplemental Code is 0x%.2X", oesc); 20 return buf; 21 #endif 22 } 23 } 24 25 void dfltcc_reset( 26 z_streamp strm, 27 uInt size 28 ) 29 { 30 struct dfltcc_state *dfltcc_state = 31 (struct dfltcc_state *)((char *)strm->state + size); 32 struct dfltcc_qaf_param *param = 33 (struct dfltcc_qaf_param *)&dfltcc_state->param; 34 35 /* Initialize available functions */ 36 if (is_dfltcc_enabled()) { 37 dfltcc(DFLTCC_QAF, param, NULL, NULL, NULL, NULL, NULL); 38 memmove(&dfltcc_state->af, param, sizeof(dfltcc_state->af)); 39 } else 40 memset(&dfltcc_state->af, 0, sizeof(dfltcc_state->af)); 41 42 /* Initialize parameter block */ 43 memset(&dfltcc_state->param, 0, sizeof(dfltcc_state->param)); 44 dfltcc_state->param.nt = 1; 45 46 /* Initialize tuning parameters */ 47 if (zlib_dfltcc_support == ZLIB_DFLTCC_FULL_DEBUG) 48 dfltcc_state->level_mask = DFLTCC_LEVEL_MASK_DEBUG; 49 else 50 dfltcc_state->level_mask = DFLTCC_LEVEL_MASK; 51 dfltcc_state->block_size = DFLTCC_BLOCK_SIZE; 52 dfltcc_state->block_threshold = DFLTCC_FIRST_FHT_BLOCK_SIZE; 53 dfltcc_state->dht_threshold = DFLTCC_DHT_MIN_SAMPLE_SIZE; 54 dfltcc_state->param.ribm = DFLTCC_RIBM; 55 } 56