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_8xx) 28 #define CONFIG_SYS_BOOTCOUNT_ADDR (((immap_t *)CONFIG_SYS_IMMR)->im_cpm.cp_dpmem + \ 29 CPM_BOOTCOUNT_ADDR) 30 #endif /* defined(CONFIG_8xx) */ 31 32 #if defined(CONFIG_MPC8260) 33 #include <asm/cpm_8260.h> 34 #define CONFIG_SYS_BOOTCOUNT_ADDR (CONFIG_SYS_IMMR + CPM_BOOTCOUNT_ADDR) 35 #endif /* defined(CONFIG_MPC8260) */ 36 37 #if defined(CONFIG_QE) 38 #include <linux/immap_qe.h> 39 #define CONFIG_SYS_BOOTCOUNT_ADDR (CONFIG_SYS_IMMR + 0x110000 + \ 40 QE_MURAM_SIZE - 2 * sizeof(u32)) 41 #endif /* defined(CONFIG_QE) */ 42 43 #if defined(CONFIG_4xx) 44 #define CONFIG_SYS_BOOTCOUNT_ADDR (CONFIG_SYS_OCM_DATA_ADDR + \ 45 CONFIG_SYS_BOOTCOUNT_ADDR) 46 #endif /* defined(CONFIG_4xx) */ 47 48 #endif /* !defined(CONFIG_SYS_BOOTCOUNT_ADDR) */ 49 50 /* Now implement the generic default functions */ 51 #if defined(CONFIG_SYS_BOOTCOUNT_ADDR) 52 __weak void bootcount_store(ulong a) 53 { 54 void *reg = (void *)CONFIG_SYS_BOOTCOUNT_ADDR; 55 56 #if defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD) 57 raw_bootcount_store(reg, (BOOTCOUNT_MAGIC & 0xffff0000) | a); 58 #else 59 raw_bootcount_store(reg, a); 60 raw_bootcount_store(reg + 4, BOOTCOUNT_MAGIC); 61 #endif /* defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD */ 62 } 63 64 __weak ulong bootcount_load(void) 65 { 66 void *reg = (void *)CONFIG_SYS_BOOTCOUNT_ADDR; 67 68 #if defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD) 69 u32 tmp = raw_bootcount_load(reg); 70 71 if ((tmp & 0xffff0000) != (BOOTCOUNT_MAGIC & 0xffff0000)) 72 return 0; 73 else 74 return (tmp & 0x0000ffff); 75 #else 76 if (raw_bootcount_load(reg + 4) != BOOTCOUNT_MAGIC) 77 return 0; 78 else 79 return raw_bootcount_load(reg); 80 #endif /* defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD) */ 81 } 82 #endif /* defined(CONFIG_SYS_BOOTCOUNT_ADDR) */ 83