lib/zlib_dfltcc/dfltcc.c

   1 // SPDX-License-Identifier: Zlib
   2 /* dfltcc.c - SystemZ DEFLATE CONVERSION CALL support. */
   3
   4 #include <linux/export.h>
   5 #include <linux/module.h>
   6 #include "dfltcc_util.h"
   7 #include "dfltcc.h"
   8
   9 char *oesc_msg(
  10     char *buf,
  11     int oesc
  12 )
  13 {
  14     if (oesc == 0x00)
  15         return NULL; /* Successful completion */
  16     else {
  17 #ifdef STATIC
  18         return NULL; /* Ignore for pre-boot decompressor */
  19 #else
  20         sprintf(buf, "Operation-Ending-Supplemental Code is 0x%.2X", oesc);
  21         return buf;
  22 #endif
  23     }
  24 }
  25
  26 void dfltcc_reset_state(struct dfltcc_state *dfltcc_state) {
  27     /* Initialize available functions */
  28     if (is_dfltcc_enabled()) {
  29         dfltcc(DFLTCC_QAF, &dfltcc_state->param, NULL, NULL, NULL, NULL, NULL);
  30         memmove(&dfltcc_state->af, &dfltcc_state->param, sizeof(dfltcc_state->af));
  31     } else
  32         memset(&dfltcc_state->af, 0, sizeof(dfltcc_state->af));
  33
  34     /* Initialize parameter block */
  35     memset(&dfltcc_state->param, 0, sizeof(dfltcc_state->param));
  36     dfltcc_state->param.nt = 1;
  37     dfltcc_state->param.ribm = DFLTCC_RIBM;
  38 }
  39
  40 MODULE_LICENSE("GPL");