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Tom Rini83d290c2018-05-06 17:58:06 -04001/* SPDX-License-Identifier: GPL-2.0+ */
Stefan Roese0044c422012-08-16 17:55:41 +00002/*
3 * (C) Copyright 2012
4 * Stefan Roese, DENX Software Engineering, sr@denx.de.
Stefan Roese0044c422012-08-16 17:55:41 +00005 */
Lukasz Majewskic1cd21d2018-05-02 16:10:51 +02006#ifndef _BOOTCOUNT_H__
7#define _BOOTCOUNT_H__
Stefan Roese0044c422012-08-16 17:55:41 +00008
9#include <common.h>
10#include <asm/io.h>
11#include <asm/byteorder.h>
Simon Glass168068f2019-08-01 09:46:47 -060012#include <env.h>
Stefan Roese0044c422012-08-16 17:55:41 +000013
Philipp Tomsichebb73de2018-11-27 23:00:18 +010014#ifdef CONFIG_DM_BOOTCOUNT
15
16struct bootcount_ops {
17 /**
18 * get() - get the current bootcount value
19 *
20 * Returns the current counter value of the bootcount backing
21 * store.
22 *
23 * @dev: Device to read from
24 * @bootcount: Address to put the current bootcount value
25 */
26 int (*get)(struct udevice *dev, u32 *bootcount);
27
28 /**
29 * set() - set a bootcount value (e.g. to reset or increment)
30 *
31 * Sets the value in the bootcount backing store.
32 *
33 * @dev: Device to read from
34 * @bootcount: New bootcount value to store
35 */
36 int (*set)(struct udevice *dev, const u32 bootcount);
37};
38
39/* Access the operations for a bootcount device */
40#define bootcount_get_ops(dev) ((struct bootcount_ops *)(dev)->driver->ops)
41
42/**
43 * dm_bootcount_get() - Read the current value from a bootcount storage
44 *
45 * @dev: Device to read from
46 * @bootcount: Place to put the current bootcount
47 * @return 0 if OK, -ve on error
48 */
49int dm_bootcount_get(struct udevice *dev, u32 *bootcount);
50
51/**
52 * dm_bootcount_set() - Write a value to a bootcount storage
53 *
54 * @dev: Device to read from
55 * @bootcount: Value to be written to the backing storage
56 * @return 0 if OK, -ve on error
57 */
58int dm_bootcount_set(struct udevice *dev, u32 bootcount);
59
60#endif
61
Lukasz Majewski0da70412018-05-02 16:10:52 +020062#if defined(CONFIG_SPL_BOOTCOUNT_LIMIT) || defined(CONFIG_BOOTCOUNT_LIMIT)
63
Stefan Roese0044c422012-08-16 17:55:41 +000064#if !defined(CONFIG_SYS_BOOTCOUNT_LE) && !defined(CONFIG_SYS_BOOTCOUNT_BE)
65# if __BYTE_ORDER == __LITTLE_ENDIAN
66# define CONFIG_SYS_BOOTCOUNT_LE
67# else
68# define CONFIG_SYS_BOOTCOUNT_BE
69# endif
70#endif
71
72#ifdef CONFIG_SYS_BOOTCOUNT_LE
73static inline void raw_bootcount_store(volatile u32 *addr, u32 data)
74{
75 out_le32(addr, data);
76}
77
78static inline u32 raw_bootcount_load(volatile u32 *addr)
79{
80 return in_le32(addr);
81}
82#else
83static inline void raw_bootcount_store(volatile u32 *addr, u32 data)
84{
85 out_be32(addr, data);
86}
87
88static inline u32 raw_bootcount_load(volatile u32 *addr)
89{
90 return in_be32(addr);
91}
92#endif
Lukasz Majewski0da70412018-05-02 16:10:52 +020093
94DECLARE_GLOBAL_DATA_PTR;
95static inline int bootcount_error(void)
96{
97 unsigned long bootcount = bootcount_load();
98 unsigned long bootlimit = env_get_ulong("bootlimit", 10, 0);
99
100 if (bootlimit && bootcount > bootlimit) {
101 printf("Warning: Bootlimit (%lu) exceeded.", bootlimit);
102 if (!(gd->flags & GD_FLG_SPL_INIT))
103 printf(" Using altbootcmd.");
104 printf("\n");
105
106 return 1;
107 }
108
109 return 0;
110}
111
112static inline void bootcount_inc(void)
113{
114 unsigned long bootcount = bootcount_load();
115
116 if (gd->flags & GD_FLG_SPL_INIT) {
117 bootcount_store(++bootcount);
118 return;
119 }
120
121#ifndef CONFIG_SPL_BUILD
122 /* Only increment bootcount when no bootcount support in SPL */
123#ifndef CONFIG_SPL_BOOTCOUNT_LIMIT
124 bootcount_store(++bootcount);
125#endif
126 env_set_ulong("bootcount", bootcount);
127#endif /* !CONFIG_SPL_BUILD */
128}
129
130#if defined(CONFIG_SPL_BUILD) && !defined(CONFIG_SPL_BOOTCOUNT_LIMIT)
131void bootcount_store(ulong a) {};
132ulong bootcount_load(void) { return 0; }
133#endif /* CONFIG_SPL_BUILD && !CONFIG_SPL_BOOTCOUNT_LIMIT */
134#else
135static inline int bootcount_error(void) { return 0; }
136static inline void bootcount_inc(void) {}
137#endif /* CONFIG_SPL_BOOTCOUNT_LIMIT || CONFIG_BOOTCOUNT_LIMIT */
Lukasz Majewskic1cd21d2018-05-02 16:10:51 +0200138#endif /* _BOOTCOUNT_H__ */