intel_wopcm.h

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