1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3 * (C) Copyright 2012
4 * Stefan Roese, DENX Software Engineering, sr@denx.de.
5 */
6 #ifndef _BOOTCOUNT_H__
7 #define _BOOTCOUNT_H__
8
9 #include <common.h>
10 #include <asm/io.h>
11 #include <asm/byteorder.h>
12
13 #if defined(CONFIG_SPL_BOOTCOUNT_LIMIT) || defined(CONFIG_BOOTCOUNT_LIMIT)
14
15 #if !defined(CONFIG_SYS_BOOTCOUNT_LE) && !defined(CONFIG_SYS_BOOTCOUNT_BE)
16 # if __BYTE_ORDER == __LITTLE_ENDIAN
17 # define CONFIG_SYS_BOOTCOUNT_LE
18 # else
19 # define CONFIG_SYS_BOOTCOUNT_BE
20 # endif
21 #endif
22
23 #ifdef CONFIG_SYS_BOOTCOUNT_LE
raw_bootcount_store(volatile u32 * addr,u32 data)24 static inline void raw_bootcount_store(volatile u32 *addr, u32 data)
25 {
26 out_le32(addr, data);
27 }
28
raw_bootcount_load(volatile u32 * addr)29 static inline u32 raw_bootcount_load(volatile u32 *addr)
30 {
31 return in_le32(addr);
32 }
33 #else
raw_bootcount_store(volatile u32 * addr,u32 data)34 static inline void raw_bootcount_store(volatile u32 *addr, u32 data)
35 {
36 out_be32(addr, data);
37 }
38
raw_bootcount_load(volatile u32 * addr)39 static inline u32 raw_bootcount_load(volatile u32 *addr)
40 {
41 return in_be32(addr);
42 }
43 #endif
44
45 DECLARE_GLOBAL_DATA_PTR;
bootcount_error(void)46 static inline int bootcount_error(void)
47 {
48 unsigned long bootcount = bootcount_load();
49 unsigned long bootlimit = env_get_ulong("bootlimit", 10, 0);
50
51 if (bootlimit && bootcount > bootlimit) {
52 printf("Warning: Bootlimit (%lu) exceeded.", bootlimit);
53 if (!(gd->flags & GD_FLG_SPL_INIT))
54 printf(" Using altbootcmd.");
55 printf("\n");
56
57 return 1;
58 }
59
60 return 0;
61 }
62
bootcount_inc(void)63 static inline void bootcount_inc(void)
64 {
65 unsigned long bootcount = bootcount_load();
66
67 if (gd->flags & GD_FLG_SPL_INIT) {
68 bootcount_store(++bootcount);
69 return;
70 }
71
72 #ifndef CONFIG_SPL_BUILD
73 /* Only increment bootcount when no bootcount support in SPL */
74 #ifndef CONFIG_SPL_BOOTCOUNT_LIMIT
75 bootcount_store(++bootcount);
76 #endif
77 env_set_ulong("bootcount", bootcount);
78 #endif /* !CONFIG_SPL_BUILD */
79 }
80
81 #if defined(CONFIG_SPL_BUILD) && !defined(CONFIG_SPL_BOOTCOUNT_LIMIT)
bootcount_store(ulong a)82 void bootcount_store(ulong a) {};
bootcount_load(void)83 ulong bootcount_load(void) { return 0; }
84 #endif /* CONFIG_SPL_BUILD && !CONFIG_SPL_BOOTCOUNT_LIMIT */
85 #else
bootcount_error(void)86 static inline int bootcount_error(void) { return 0; }
bootcount_inc(void)87 static inline void bootcount_inc(void) {}
88 #endif /* CONFIG_SPL_BOOTCOUNT_LIMIT || CONFIG_BOOTCOUNT_LIMIT */
89 #endif /* _BOOTCOUNT_H__ */
90