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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
Simon Glass401d1c42020-10-30 21:38:53 -06009#include <asm/global_data.h>
Stefan Roese0044c422012-08-16 17:55:41 +000010#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
Heinrich Schuchardt185f8122022-01-19 18:05:50 +010047 * Return: 0 if OK, -ve on error
Philipp Tomsichebb73de2018-11-27 23:00:18 +010048 */
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
Heinrich Schuchardt185f8122022-01-19 18:05:50 +010056 * Return: 0 if OK, -ve on error
Philipp Tomsichebb73de2018-11-27 23:00:18 +010057 */
58int dm_bootcount_set(struct udevice *dev, u32 bootcount);
59
60#endif
61
Simon Glassf0835832019-11-14 12:57:18 -070062/** bootcount_store() - store the current bootcount */
63void bootcount_store(ulong);
64
65/**
66 * bootcount_load() - load the current bootcount
67 *
Heinrich Schuchardt185f8122022-01-19 18:05:50 +010068 * Return: bootcount, read from the appropriate location
Simon Glassf0835832019-11-14 12:57:18 -070069 */
70ulong bootcount_load(void);
71
Philippe Reynes4d145f22020-12-11 19:56:47 +010072#if defined(CONFIG_SPL_BOOTCOUNT_LIMIT) || defined(CONFIG_TPL_BOOTCOUNT_LIMIT) || defined(CONFIG_BOOTCOUNT_LIMIT)
Lukasz Majewski0da70412018-05-02 16:10:52 +020073
Stefan Roese0044c422012-08-16 17:55:41 +000074#ifdef CONFIG_SYS_BOOTCOUNT_LE
75static inline void raw_bootcount_store(volatile u32 *addr, u32 data)
76{
77 out_le32(addr, data);
78}
79
80static inline u32 raw_bootcount_load(volatile u32 *addr)
81{
82 return in_le32(addr);
83}
84#else
85static inline void raw_bootcount_store(volatile u32 *addr, u32 data)
86{
87 out_be32(addr, data);
88}
89
90static inline u32 raw_bootcount_load(volatile u32 *addr)
91{
92 return in_be32(addr);
93}
94#endif
Lukasz Majewski0da70412018-05-02 16:10:52 +020095
96DECLARE_GLOBAL_DATA_PTR;
97static inline int bootcount_error(void)
98{
99 unsigned long bootcount = bootcount_load();
100 unsigned long bootlimit = env_get_ulong("bootlimit", 10, 0);
101
102 if (bootlimit && bootcount > bootlimit) {
103 printf("Warning: Bootlimit (%lu) exceeded.", bootlimit);
104 if (!(gd->flags & GD_FLG_SPL_INIT))
105 printf(" Using altbootcmd.");
106 printf("\n");
107
108 return 1;
109 }
110
111 return 0;
112}
113
114static inline void bootcount_inc(void)
115{
116 unsigned long bootcount = bootcount_load();
117
118 if (gd->flags & GD_FLG_SPL_INIT) {
119 bootcount_store(++bootcount);
120 return;
121 }
122
123#ifndef CONFIG_SPL_BUILD
124 /* Only increment bootcount when no bootcount support in SPL */
Philippe Reynes4d145f22020-12-11 19:56:47 +0100125#if !defined(CONFIG_SPL_BOOTCOUNT_LIMIT) && !defined(CONFIG_TPL_BOOTCOUNT_LIMIT)
Lukasz Majewski0da70412018-05-02 16:10:52 +0200126 bootcount_store(++bootcount);
127#endif
128 env_set_ulong("bootcount", bootcount);
129#endif /* !CONFIG_SPL_BUILD */
130}
131
Lukasz Majewski0da70412018-05-02 16:10:52 +0200132#else
133static inline int bootcount_error(void) { return 0; }
134static inline void bootcount_inc(void) {}
Philippe Reynes4d145f22020-12-11 19:56:47 +0100135#endif /* CONFIG_SPL_BOOTCOUNT_LIMIT || CONFIG_TPL_BOOTCOUNT_LIMIT || CONFIG_BOOTCOUNT_LIMIT */
Lukasz Majewskic1cd21d2018-05-02 16:10:51 +0200136#endif /* _BOOTCOUNT_H__ */