1 /* 2 * (C) Copyright 2010-2012 3 * Stefan Roese, DENX Software Engineering, sr@denx.de. 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #include <bootcount.h> 9 #include <linux/compiler.h> 10 11 /* 12 * Only override CONFIG_SYS_BOOTCOUNT_ADDR if not already defined. This 13 * way, some boards can define it directly in their config header. 14 */ 15 #if !defined(CONFIG_SYS_BOOTCOUNT_ADDR) 16 17 #if defined(CONFIG_MPC5xxx) 18 #define CONFIG_SYS_BOOTCOUNT_ADDR (MPC5XXX_CDM_BRDCRMB) 19 #define CONFIG_SYS_BOOTCOUNT_SINGLEWORD 20 #endif /* defined(CONFIG_MPC5xxx) */ 21 22 #if defined(CONFIG_MPC512X) 23 #define CONFIG_SYS_BOOTCOUNT_ADDR (&((immap_t *)CONFIG_SYS_IMMR)->clk.bcr) 24 #define CONFIG_SYS_BOOTCOUNT_SINGLEWORD 25 #endif /* defined(CONFIG_MPC512X) */ 26 27 #if defined(CONFIG_QE) 28 #include <linux/immap_qe.h> 29 #define CONFIG_SYS_BOOTCOUNT_ADDR (CONFIG_SYS_IMMR + 0x110000 + \ 30 QE_MURAM_SIZE - 2 * sizeof(u32)) 31 #endif /* defined(CONFIG_QE) */ 32 33 #if defined(CONFIG_4xx) 34 #define CONFIG_SYS_BOOTCOUNT_ADDR (CONFIG_SYS_OCM_DATA_ADDR + \ 35 CONFIG_SYS_BOOTCOUNT_ADDR) 36 #endif /* defined(CONFIG_4xx) */ 37 38 #endif /* !defined(CONFIG_SYS_BOOTCOUNT_ADDR) */ 39 40 /* Now implement the generic default functions */ 41 #if defined(CONFIG_SYS_BOOTCOUNT_ADDR) 42 __weak void bootcount_store(ulong a) 43 { 44 void *reg = (void *)CONFIG_SYS_BOOTCOUNT_ADDR; 45 46 #if defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD) 47 raw_bootcount_store(reg, (BOOTCOUNT_MAGIC & 0xffff0000) | a); 48 #else 49 raw_bootcount_store(reg, a); 50 raw_bootcount_store(reg + 4, BOOTCOUNT_MAGIC); 51 #endif /* defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD */ 52 } 53 54 __weak ulong bootcount_load(void) 55 { 56 void *reg = (void *)CONFIG_SYS_BOOTCOUNT_ADDR; 57 58 #if defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD) 59 u32 tmp = raw_bootcount_load(reg); 60 61 if ((tmp & 0xffff0000) != (BOOTCOUNT_MAGIC & 0xffff0000)) 62 return 0; 63 else 64 return (tmp & 0x0000ffff); 65 #else 66 if (raw_bootcount_load(reg + 4) != BOOTCOUNT_MAGIC) 67 return 0; 68 else 69 return raw_bootcount_load(reg); 70 #endif /* defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD) */ 71 } 72 #endif /* defined(CONFIG_SYS_BOOTCOUNT_ADDR) */ 73