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include/bootcount.h
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/* SPDX-License-Identifier: GPL-2.0+ */ |
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/* * (C) Copyright 2012 * Stefan Roese, DENX Software Engineering, sr@denx.de. |
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*/ |
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#ifndef _BOOTCOUNT_H__ #define _BOOTCOUNT_H__ |
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#include <common.h> #include <asm/io.h> #include <asm/byteorder.h> |
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#include <env.h> |
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#ifdef CONFIG_DM_BOOTCOUNT struct bootcount_ops { /** * get() - get the current bootcount value * * Returns the current counter value of the bootcount backing * store. * * @dev: Device to read from * @bootcount: Address to put the current bootcount value */ int (*get)(struct udevice *dev, u32 *bootcount); /** * set() - set a bootcount value (e.g. to reset or increment) * * Sets the value in the bootcount backing store. * * @dev: Device to read from * @bootcount: New bootcount value to store */ int (*set)(struct udevice *dev, const u32 bootcount); }; /* Access the operations for a bootcount device */ #define bootcount_get_ops(dev) ((struct bootcount_ops *)(dev)->driver->ops) /** * dm_bootcount_get() - Read the current value from a bootcount storage * * @dev: Device to read from * @bootcount: Place to put the current bootcount * @return 0 if OK, -ve on error */ int dm_bootcount_get(struct udevice *dev, u32 *bootcount); /** * dm_bootcount_set() - Write a value to a bootcount storage * * @dev: Device to read from * @bootcount: Value to be written to the backing storage * @return 0 if OK, -ve on error */ int dm_bootcount_set(struct udevice *dev, u32 bootcount); #endif |
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/** bootcount_store() - store the current bootcount */ void bootcount_store(ulong); /** * bootcount_load() - load the current bootcount * * @return bootcount, read from the appropriate location */ ulong bootcount_load(void); |
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#if defined(CONFIG_SPL_BOOTCOUNT_LIMIT) || defined(CONFIG_BOOTCOUNT_LIMIT) |
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#if !defined(CONFIG_SYS_BOOTCOUNT_LE) && !defined(CONFIG_SYS_BOOTCOUNT_BE) # if __BYTE_ORDER == __LITTLE_ENDIAN # define CONFIG_SYS_BOOTCOUNT_LE # else # define CONFIG_SYS_BOOTCOUNT_BE # endif #endif #ifdef CONFIG_SYS_BOOTCOUNT_LE static inline void raw_bootcount_store(volatile u32 *addr, u32 data) { out_le32(addr, data); } static inline u32 raw_bootcount_load(volatile u32 *addr) { return in_le32(addr); } #else static inline void raw_bootcount_store(volatile u32 *addr, u32 data) { out_be32(addr, data); } static inline u32 raw_bootcount_load(volatile u32 *addr) { return in_be32(addr); } #endif |
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DECLARE_GLOBAL_DATA_PTR; static inline int bootcount_error(void) { unsigned long bootcount = bootcount_load(); unsigned long bootlimit = env_get_ulong("bootlimit", 10, 0); if (bootlimit && bootcount > bootlimit) { printf("Warning: Bootlimit (%lu) exceeded.", bootlimit); if (!(gd->flags & GD_FLG_SPL_INIT)) printf(" Using altbootcmd."); printf(" "); return 1; } return 0; } static inline void bootcount_inc(void) { unsigned long bootcount = bootcount_load(); if (gd->flags & GD_FLG_SPL_INIT) { bootcount_store(++bootcount); return; } #ifndef CONFIG_SPL_BUILD /* Only increment bootcount when no bootcount support in SPL */ #ifndef CONFIG_SPL_BOOTCOUNT_LIMIT bootcount_store(++bootcount); #endif env_set_ulong("bootcount", bootcount); #endif /* !CONFIG_SPL_BUILD */ } |
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#else static inline int bootcount_error(void) { return 0; } static inline void bootcount_inc(void) {} #endif /* CONFIG_SPL_BOOTCOUNT_LIMIT || CONFIG_BOOTCOUNT_LIMIT */ |
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#endif /* _BOOTCOUNT_H__ */ |