1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* 3 * (C) Copyright 2012 4 * Stefan Roese, DENX Software Engineering, sr@denx.de. 5 */ 6 #ifndef _BOOTCOUNT_H__ 7 #define _BOOTCOUNT_H__ 8 9 #include <common.h> 10 #include <asm/io.h> 11 #include <asm/byteorder.h> 12 13 #if defined(CONFIG_SPL_BOOTCOUNT_LIMIT) || defined(CONFIG_BOOTCOUNT_LIMIT) 14 15 #if !defined(CONFIG_SYS_BOOTCOUNT_LE) && !defined(CONFIG_SYS_BOOTCOUNT_BE) 16 # if __BYTE_ORDER == __LITTLE_ENDIAN 17 # define CONFIG_SYS_BOOTCOUNT_LE 18 # else 19 # define CONFIG_SYS_BOOTCOUNT_BE 20 # endif 21 #endif 22 23 #ifdef CONFIG_SYS_BOOTCOUNT_LE 24 static inline void raw_bootcount_store(volatile u32 *addr, u32 data) 25 { 26 out_le32(addr, data); 27 } 28 29 static inline u32 raw_bootcount_load(volatile u32 *addr) 30 { 31 return in_le32(addr); 32 } 33 #else 34 static inline void raw_bootcount_store(volatile u32 *addr, u32 data) 35 { 36 out_be32(addr, data); 37 } 38 39 static inline u32 raw_bootcount_load(volatile u32 *addr) 40 { 41 return in_be32(addr); 42 } 43 #endif 44 45 DECLARE_GLOBAL_DATA_PTR; 46 static inline int bootcount_error(void) 47 { 48 unsigned long bootcount = bootcount_load(); 49 unsigned long bootlimit = env_get_ulong("bootlimit", 10, 0); 50 51 if (bootlimit && bootcount > bootlimit) { 52 printf("Warning: Bootlimit (%lu) exceeded.", bootlimit); 53 if (!(gd->flags & GD_FLG_SPL_INIT)) 54 printf(" Using altbootcmd."); 55 printf("\n"); 56 57 return 1; 58 } 59 60 return 0; 61 } 62 63 static inline void bootcount_inc(void) 64 { 65 unsigned long bootcount = bootcount_load(); 66 67 if (gd->flags & GD_FLG_SPL_INIT) { 68 bootcount_store(++bootcount); 69 return; 70 } 71 72 #ifndef CONFIG_SPL_BUILD 73 /* Only increment bootcount when no bootcount support in SPL */ 74 #ifndef CONFIG_SPL_BOOTCOUNT_LIMIT 75 bootcount_store(++bootcount); 76 #endif 77 env_set_ulong("bootcount", bootcount); 78 #endif /* !CONFIG_SPL_BUILD */ 79 } 80 81 #if defined(CONFIG_SPL_BUILD) && !defined(CONFIG_SPL_BOOTCOUNT_LIMIT) 82 void bootcount_store(ulong a) {}; 83 ulong bootcount_load(void) { return 0; } 84 #endif /* CONFIG_SPL_BUILD && !CONFIG_SPL_BOOTCOUNT_LIMIT */ 85 #else 86 static inline int bootcount_error(void) { return 0; } 87 static inline void bootcount_inc(void) {} 88 #endif /* CONFIG_SPL_BOOTCOUNT_LIMIT || CONFIG_BOOTCOUNT_LIMIT */ 89 #endif /* _BOOTCOUNT_H__ */ 90