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> | |
| 168068fb | 12 | #include <env.h> |
| 0044c42e | 13 | |
| ebb73de1 PT |
14 | #ifdef CONFIG_DM_BOOTCOUNT |
| 15 | ||
| 16 | struct 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 | */ | |
| 49 | int 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 | */ | |
| 58 | int dm_bootcount_set(struct udevice *dev, u32 bootcount); | |
| 59 | ||
| 60 | #endif | |
| 61 | ||
| 0da70412 LM |
62 | #if defined(CONFIG_SPL_BOOTCOUNT_LIMIT) || defined(CONFIG_BOOTCOUNT_LIMIT) |
| 63 | ||
| 0044c42e SR |
64 | #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 | |
| 73 | static inline void raw_bootcount_store(volatile u32 *addr, u32 data) | |
| 74 | { | |
| 75 | out_le32(addr, data); | |
| 76 | } | |
| 77 | ||
| 78 | static inline u32 raw_bootcount_load(volatile u32 *addr) | |
| 79 | { | |
| 80 | return in_le32(addr); | |
| 81 | } | |
| 82 | #else | |
| 83 | static inline void raw_bootcount_store(volatile u32 *addr, u32 data) | |
| 84 | { | |
| 85 | out_be32(addr, data); | |
| 86 | } | |
| 87 | ||
| 88 | static inline u32 raw_bootcount_load(volatile u32 *addr) | |
| 89 | { | |
| 90 | return in_be32(addr); | |
| 91 | } | |
| 92 | #endif | |
| 0da70412 LM |
93 | |
| 94 | DECLARE_GLOBAL_DATA_PTR; | |
| 95 | static 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 | ||
| 112 | static 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) | |
| 131 | void bootcount_store(ulong a) {}; | |
| 132 | ulong bootcount_load(void) { return 0; } | |
| 133 | #endif /* CONFIG_SPL_BUILD && !CONFIG_SPL_BOOTCOUNT_LIMIT */ | |
| 134 | #else | |
| 135 | static inline int bootcount_error(void) { return 0; } | |
| 136 | static inline void bootcount_inc(void) {} | |
| 137 | #endif /* CONFIG_SPL_BOOTCOUNT_LIMIT || CONFIG_BOOTCOUNT_LIMIT */ | |
| c1cd21db | 138 | #endif /* _BOOTCOUNT_H__ */ |