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83d290c5 | 1 | /* SPDX-License-Identifier: GPL-2.0+ */ |
0044c42e SR |
2 | /* |
3 | * (C) Copyright 2012 | |
4 | * Stefan Roese, DENX Software Engineering, [email protected]. | |
0044c42e | 5 | */ |
c1cd21db LM |
6 | #ifndef _BOOTCOUNT_H__ |
7 | #define _BOOTCOUNT_H__ | |
0044c42e SR |
8 | |
9 | #include <common.h> | |
10 | #include <asm/io.h> | |
11 | #include <asm/byteorder.h> | |
12 | ||
ebb73de1 PT |
13 | #ifdef CONFIG_DM_BOOTCOUNT |
14 | ||
15 | struct bootcount_ops { | |
16 | /** | |
17 | * get() - get the current bootcount value | |
18 | * | |
19 | * Returns the current counter value of the bootcount backing | |
20 | * store. | |
21 | * | |
22 | * @dev: Device to read from | |
23 | * @bootcount: Address to put the current bootcount value | |
24 | */ | |
25 | int (*get)(struct udevice *dev, u32 *bootcount); | |
26 | ||
27 | /** | |
28 | * set() - set a bootcount value (e.g. to reset or increment) | |
29 | * | |
30 | * Sets the value in the bootcount backing store. | |
31 | * | |
32 | * @dev: Device to read from | |
33 | * @bootcount: New bootcount value to store | |
34 | */ | |
35 | int (*set)(struct udevice *dev, const u32 bootcount); | |
36 | }; | |
37 | ||
38 | /* Access the operations for a bootcount device */ | |
39 | #define bootcount_get_ops(dev) ((struct bootcount_ops *)(dev)->driver->ops) | |
40 | ||
41 | /** | |
42 | * dm_bootcount_get() - Read the current value from a bootcount storage | |
43 | * | |
44 | * @dev: Device to read from | |
45 | * @bootcount: Place to put the current bootcount | |
46 | * @return 0 if OK, -ve on error | |
47 | */ | |
48 | int dm_bootcount_get(struct udevice *dev, u32 *bootcount); | |
49 | ||
50 | /** | |
51 | * dm_bootcount_set() - Write a value to a bootcount storage | |
52 | * | |
53 | * @dev: Device to read from | |
54 | * @bootcount: Value to be written to the backing storage | |
55 | * @return 0 if OK, -ve on error | |
56 | */ | |
57 | int dm_bootcount_set(struct udevice *dev, u32 bootcount); | |
58 | ||
59 | #endif | |
60 | ||
0da70412 LM |
61 | #if defined(CONFIG_SPL_BOOTCOUNT_LIMIT) || defined(CONFIG_BOOTCOUNT_LIMIT) |
62 | ||
0044c42e SR |
63 | #if !defined(CONFIG_SYS_BOOTCOUNT_LE) && !defined(CONFIG_SYS_BOOTCOUNT_BE) |
64 | # if __BYTE_ORDER == __LITTLE_ENDIAN | |
65 | # define CONFIG_SYS_BOOTCOUNT_LE | |
66 | # else | |
67 | # define CONFIG_SYS_BOOTCOUNT_BE | |
68 | # endif | |
69 | #endif | |
70 | ||
71 | #ifdef CONFIG_SYS_BOOTCOUNT_LE | |
72 | static inline void raw_bootcount_store(volatile u32 *addr, u32 data) | |
73 | { | |
74 | out_le32(addr, data); | |
75 | } | |
76 | ||
77 | static inline u32 raw_bootcount_load(volatile u32 *addr) | |
78 | { | |
79 | return in_le32(addr); | |
80 | } | |
81 | #else | |
82 | static inline void raw_bootcount_store(volatile u32 *addr, u32 data) | |
83 | { | |
84 | out_be32(addr, data); | |
85 | } | |
86 | ||
87 | static inline u32 raw_bootcount_load(volatile u32 *addr) | |
88 | { | |
89 | return in_be32(addr); | |
90 | } | |
91 | #endif | |
0da70412 LM |
92 | |
93 | DECLARE_GLOBAL_DATA_PTR; | |
94 | static inline int bootcount_error(void) | |
95 | { | |
96 | unsigned long bootcount = bootcount_load(); | |
97 | unsigned long bootlimit = env_get_ulong("bootlimit", 10, 0); | |
98 | ||
99 | if (bootlimit && bootcount > bootlimit) { | |
100 | printf("Warning: Bootlimit (%lu) exceeded.", bootlimit); | |
101 | if (!(gd->flags & GD_FLG_SPL_INIT)) | |
102 | printf(" Using altbootcmd."); | |
103 | printf("\n"); | |
104 | ||
105 | return 1; | |
106 | } | |
107 | ||
108 | return 0; | |
109 | } | |
110 | ||
111 | static inline void bootcount_inc(void) | |
112 | { | |
113 | unsigned long bootcount = bootcount_load(); | |
114 | ||
115 | if (gd->flags & GD_FLG_SPL_INIT) { | |
116 | bootcount_store(++bootcount); | |
117 | return; | |
118 | } | |
119 | ||
120 | #ifndef CONFIG_SPL_BUILD | |
121 | /* Only increment bootcount when no bootcount support in SPL */ | |
122 | #ifndef CONFIG_SPL_BOOTCOUNT_LIMIT | |
123 | bootcount_store(++bootcount); | |
124 | #endif | |
125 | env_set_ulong("bootcount", bootcount); | |
126 | #endif /* !CONFIG_SPL_BUILD */ | |
127 | } | |
128 | ||
129 | #if defined(CONFIG_SPL_BUILD) && !defined(CONFIG_SPL_BOOTCOUNT_LIMIT) | |
130 | void bootcount_store(ulong a) {}; | |
131 | ulong bootcount_load(void) { return 0; } | |
132 | #endif /* CONFIG_SPL_BUILD && !CONFIG_SPL_BOOTCOUNT_LIMIT */ | |
133 | #else | |
134 | static inline int bootcount_error(void) { return 0; } | |
135 | static inline void bootcount_inc(void) {} | |
136 | #endif /* CONFIG_SPL_BOOTCOUNT_LIMIT || CONFIG_BOOTCOUNT_LIMIT */ | |
c1cd21db | 137 | #endif /* _BOOTCOUNT_H__ */ |