1 /*
2 * SPDX-License-Identifier: MIT
3 *
4 * Copyright © 2017-2018 Intel Corporation
5 */
6
7 #ifndef _INTEL_WOPCM_H_
8 #define _INTEL_WOPCM_H_
9
10 #include <linux/types.h>
11
12 /**
13 * struct intel_wopcm - Overall WOPCM info and WOPCM regions.
14 * @size: Size of overall WOPCM.
15 * @guc: GuC WOPCM Region info.
16 * @guc.base: GuC WOPCM base which is offset from WOPCM base.
17 * @guc.size: Size of the GuC WOPCM region.
18 */
19 struct intel_wopcm {
20 u32 size;
21 struct {
22 u32 base;
23 u32 size;
24 } guc;
25 };
26
27 /**
28 * intel_wopcm_guc_base()
29 * @wopcm: intel_wopcm structure
30 *
31 * Returns the base of the WOPCM shadowed region.
32 *
33 * Returns:
34 * 0 if GuC is not present or not in use.
35 * Otherwise, the GuC WOPCM base.
36 */
37 static inline u32 intel_wopcm_guc_base(struct intel_wopcm *wopcm)
38 {
39 return wopcm->guc.base;
40 }
41
42 /**
43 * intel_wopcm_guc_size()
44 * @wopcm: intel_wopcm structure
45 *
46 * Returns size of the WOPCM shadowed region.
47 *
48 * Returns:
49 * 0 if GuC is not present or not in use.
50 * Otherwise, the GuC WOPCM size.
51 */
52 static inline u32 intel_wopcm_guc_size(struct intel_wopcm *wopcm)
53 {
54 return wopcm->guc.size;
55 }
56
57 void intel_wopcm_init_early(struct intel_wopcm *wopcm);
58 void intel_wopcm_init(struct intel_wopcm *wopcm);
59
60 #endif