Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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
8char *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
25void 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}