xref: /openbmc/linux/lib/zlib_dfltcc/dfltcc.c (revision 724ba675)
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");
41