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_MPC8260) 28 #include <asm/cpm_8260.h> 29 #define CONFIG_SYS_BOOTCOUNT_ADDR (CONFIG_SYS_IMMR + CPM_BOOTCOUNT_ADDR) 30 #endif /* defined(CONFIG_MPC8260) */ 31 32 #if defined(CONFIG_QE) 33 #include <linux/immap_qe.h> 34 #define CONFIG_SYS_BOOTCOUNT_ADDR (CONFIG_SYS_IMMR + 0x110000 + \ 35 QE_MURAM_SIZE - 2 * sizeof(u32)) 36 #endif /* defined(CONFIG_QE) */ 37 38 #if defined(CONFIG_4xx) 39 #define CONFIG_SYS_BOOTCOUNT_ADDR (CONFIG_SYS_OCM_DATA_ADDR + \ 40 CONFIG_SYS_BOOTCOUNT_ADDR) 41 #endif /* defined(CONFIG_4xx) */ 42 43 #endif /* !defined(CONFIG_SYS_BOOTCOUNT_ADDR) */ 44 45 /* Now implement the generic default functions */ 46 #if defined(CONFIG_SYS_BOOTCOUNT_ADDR) 47 __weak void bootcount_store(ulong a) 48 { 49 void *reg = (void *)CONFIG_SYS_BOOTCOUNT_ADDR; 50 51 #if defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD) 52 raw_bootcount_store(reg, (BOOTCOUNT_MAGIC & 0xffff0000) | a); 53 #else 54 raw_bootcount_store(reg, a); 55 raw_bootcount_store(reg + 4, BOOTCOUNT_MAGIC); 56 #endif /* defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD */ 57 } 58 59 __weak ulong bootcount_load(void) 60 { 61 void *reg = (void *)CONFIG_SYS_BOOTCOUNT_ADDR; 62 63 #if defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD) 64 u32 tmp = raw_bootcount_load(reg); 65 66 if ((tmp & 0xffff0000) != (BOOTCOUNT_MAGIC & 0xffff0000)) 67 return 0; 68 else 69 return (tmp & 0x0000ffff); 70 #else 71 if (raw_bootcount_load(reg + 4) != BOOTCOUNT_MAGIC) 72 return 0; 73 else 74 return raw_bootcount_load(reg); 75 #endif /* defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD) */ 76 } 77 #endif /* defined(CONFIG_SYS_BOOTCOUNT_ADDR) */ 78