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
9char *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
26void 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
40MODULE_LICENSE("GPL");
41