projects / J-u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 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__ */ |