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https://github.com/AsahiLinux/u-boot
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0da7041218
Those two functions can be used to provide easy bootcount management. Signed-off-by: Lukasz Majewski <lukma@denx.de> Reviewed-by: Tom Rini <trini@konsulko.com> Reviewed-by: Stefan Roese <sr@denx.de>
89 lines
2.1 KiB
C
89 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* (C) Copyright 2012
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* Stefan Roese, DENX Software Engineering, sr@denx.de.
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*/
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#ifndef _BOOTCOUNT_H__
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#define _BOOTCOUNT_H__
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#include <common.h>
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#include <asm/io.h>
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#include <asm/byteorder.h>
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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)
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# if __BYTE_ORDER == __LITTLE_ENDIAN
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# define CONFIG_SYS_BOOTCOUNT_LE
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# else
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# define CONFIG_SYS_BOOTCOUNT_BE
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# endif
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#endif
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#ifdef CONFIG_SYS_BOOTCOUNT_LE
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static inline void raw_bootcount_store(volatile u32 *addr, u32 data)
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{
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out_le32(addr, data);
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}
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static inline u32 raw_bootcount_load(volatile u32 *addr)
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{
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return in_le32(addr);
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}
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#else
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static inline void raw_bootcount_store(volatile u32 *addr, u32 data)
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{
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out_be32(addr, data);
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}
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static inline u32 raw_bootcount_load(volatile u32 *addr)
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{
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return in_be32(addr);
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}
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#endif
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DECLARE_GLOBAL_DATA_PTR;
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static inline int bootcount_error(void)
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{
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unsigned long bootcount = bootcount_load();
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unsigned long bootlimit = env_get_ulong("bootlimit", 10, 0);
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if (bootlimit && bootcount > bootlimit) {
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printf("Warning: Bootlimit (%lu) exceeded.", bootlimit);
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if (!(gd->flags & GD_FLG_SPL_INIT))
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printf(" Using altbootcmd.");
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printf("\n");
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return 1;
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}
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return 0;
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}
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static inline void bootcount_inc(void)
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{
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unsigned long bootcount = bootcount_load();
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if (gd->flags & GD_FLG_SPL_INIT) {
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bootcount_store(++bootcount);
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return;
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}
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#ifndef CONFIG_SPL_BUILD
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/* Only increment bootcount when no bootcount support in SPL */
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#ifndef CONFIG_SPL_BOOTCOUNT_LIMIT
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bootcount_store(++bootcount);
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#endif
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env_set_ulong("bootcount", bootcount);
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#endif /* !CONFIG_SPL_BUILD */
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}
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#if defined(CONFIG_SPL_BUILD) && !defined(CONFIG_SPL_BOOTCOUNT_LIMIT)
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void bootcount_store(ulong a) {};
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ulong bootcount_load(void) { return 0; }
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#endif /* CONFIG_SPL_BUILD && !CONFIG_SPL_BOOTCOUNT_LIMIT */
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#else
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static inline int bootcount_error(void) { return 0; }
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static inline void bootcount_inc(void) {}
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#endif /* CONFIG_SPL_BOOTCOUNT_LIMIT || CONFIG_BOOTCOUNT_LIMIT */
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#endif /* _BOOTCOUNT_H__ */
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