blob: be6149640c04168be5843c5f9836c852e16be461 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
|
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2023 Renesas Electronics Corp.
*/
#ifndef _ANDES_PMA_H_
#define _ANDES_PMA_H_
#include <sbi/sbi_types.h>
#define ANDES_MAX_PMA_REGIONS 16
#define ANDES_PMA_GRANULARITY (1 << 12)
#define ANDES_PMACFG_ETYP_OFFSET 0
#define ANDES_PMACFG_ETYP_MASK (3 << ANDES_PMACFG_ETYP_OFFSET)
#define ANDES_PMACFG_ETYP_OFF (0 << ANDES_PMACFG_ETYP_OFFSET)
/* Naturally aligned power of 2 region */
#define ANDES_PMACFG_ETYP_NAPOT (3 << ANDES_PMACFG_ETYP_OFFSET)
#define ANDES_PMACFG_MTYP_OFFSET 2
/* Memory, Non-cacheable, Bufferable */
#define ANDES_PMACFG_MTYP_MEM_NON_CACHE_BUF (3 << ANDES_PMACFG_MTYP_OFFSET)
/**
* struct andes_pma_region - Describes PMA regions
*
* @pa: Address to be configured in the PMA
* @size: Size of the region
* @flags: Flags to be set for the PMA region
* @dt_populate: Boolean flag indicating if the DT entry should be
* populated for the given PMA region
* @shared_dma: Boolean flag if set "shared-dma-pool" property will
* be set in the DT node
* @no_map: Boolean flag if set "no-map" property will be set in the
* DT node
* @dma_default: Boolean flag if set "linux,dma-default" property will
* be set in the DT node. Note Linux expects single node
* with this property set.
*/
struct andes_pma_region {
unsigned long pa;
unsigned long size;
u8 flags:7;
bool dt_populate;
bool shared_dma;
bool no_map;
bool dma_default;
};
int andes_pma_setup_regions(void *fdt,
const struct andes_pma_region *pma_regions,
unsigned int pma_regions_count);
/**
* Programmable PMA(PPMA) is a feature for Andes. PPMA allows dynamic adjustment
* of memory attributes in the runtime. It contains a configurable amount of PMA
* entries implemented as CSRs to control the attributes of memory locations.
*
* Check if hardware supports PPMA
*
* @return true if PPMA is supported
* @return false if PPMA is not supported
*/
bool andes_sbi_probe_pma(void);
/**
* Set a NAPOT region with given memory attributes
* @param pa: Start address of the NAPOT region
* @param size: Size of the NAPOT region
* @param flags: Memory attributes set to the NAPOT region
*
* @return SBI_SUCCESS on success
* @return SBI_ERR_NOT_SUPPORTED if hardware does not support PPMA features
* @return SBI_ERR_INVALID_PARAM if the given region is overlapped with the
* region that has been set already
* @return SBI_ERR_FAILED if available entries have run out or setup fails
*/
int andes_sbi_set_pma(unsigned long pa, unsigned long size, u8 flags);
/**
* Reset the memory attribute of a NAPOT region
* @param pa Start address of the NAPOT region
*
* @return SBI_SUCCESS on success
* @return SBI_ERR_FAILED if the given region is not set before
*/
int andes_sbi_free_pma(unsigned long pa);
#endif /* _ANDES_PMA_H_ */
|
