From 0da7041218f4779480177cd0f2f97ba2b4396e76 Mon Sep 17 00:00:00 2001 From: Lukasz Majewski Date: Wed, 2 May 2018 16:10:52 +0200 Subject: [PATCH] bootcount: Add function wrappers to handle bootcount increment and error checking Those two functions can be used to provide easy bootcount management. Signed-off-by: Lukasz Majewski Reviewed-by: Tom Rini Reviewed-by: Stefan Roese --- include/bootcount.h | 47 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) diff --git a/include/bootcount.h b/include/bootcount.h index c0a6b6e0e2..671adcc410 100644 --- a/include/bootcount.h +++ b/include/bootcount.h @@ -10,6 +10,8 @@ #include #include +#if defined(CONFIG_SPL_BOOTCOUNT_LIMIT) || defined(CONFIG_BOOTCOUNT_LIMIT) + #if !defined(CONFIG_SYS_BOOTCOUNT_LE) && !defined(CONFIG_SYS_BOOTCOUNT_BE) # if __BYTE_ORDER == __LITTLE_ENDIAN # define CONFIG_SYS_BOOTCOUNT_LE @@ -39,4 +41,49 @@ static inline u32 raw_bootcount_load(volatile u32 *addr) return in_be32(addr); } #endif + +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("\n"); + + 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 */ +} + +#if defined(CONFIG_SPL_BUILD) && !defined(CONFIG_SPL_BOOTCOUNT_LIMIT) +void bootcount_store(ulong a) {}; +ulong bootcount_load(void) { return 0; } +#endif /* CONFIG_SPL_BUILD && !CONFIG_SPL_BOOTCOUNT_LIMIT */ +#else +static inline int bootcount_error(void) { return 0; } +static inline void bootcount_inc(void) {} +#endif /* CONFIG_SPL_BOOTCOUNT_LIMIT || CONFIG_BOOTCOUNT_LIMIT */ #endif /* _BOOTCOUNT_H__ */ -- 2.25.1