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 35 #define CONFIG_SYS_BOOTCOUNT_ADDR (CONFIG_SYS_IMMR + CPM_BOOTCOUNT_ADDR) 36 #endif /* defined(CONFIG_MPC8260) */ 37 38 #if defined(CONFIG_QE) 39 #include <linux/immap_qe.h> 40 41 #define CONFIG_SYS_BOOTCOUNT_ADDR (CONFIG_SYS_IMMR + 0x110000 + \ 42 QE_MURAM_SIZE - 2 * sizeof(u32)) 43 #endif /* defined(CONFIG_MPC8360) */ 44 45 #if defined(CONFIG_4xx) 46 #define CONFIG_SYS_BOOTCOUNT_ADDR (CONFIG_SYS_OCM_DATA_ADDR + \ 47 CONFIG_SYS_BOOTCOUNT_ADDR) 48 #endif /* defined(CONFIG_4xx) */ 49 50 #endif /* !defined(CONFIG_SYS_BOOTCOUNT_ADDR) */ 51 52 /* Now implement the generic default functions */ 53 #if defined(CONFIG_SYS_BOOTCOUNT_ADDR) 54 __weak void bootcount_store(ulong a) 55 { 56 void *reg = (void *)CONFIG_SYS_BOOTCOUNT_ADDR; 57 58 #if defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD) 59 raw_bootcount_store(reg, (BOOTCOUNT_MAGIC & 0xffff0000) | a); 60 #else 61 raw_bootcount_store(reg, a); 62 raw_bootcount_store(reg + 4, BOOTCOUNT_MAGIC); 63 #endif 64 } 65 66 __weak ulong bootcount_load(void) 67 { 68 void *reg = (void *)CONFIG_SYS_BOOTCOUNT_ADDR; 69 70 #if defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD) 71 u32 tmp = raw_bootcount_load(reg); 72 73 if ((tmp & 0xffff0000) != (BOOTCOUNT_MAGIC & 0xffff0000)) 74 return 0; 75 else 76 return (tmp & 0x0000ffff); 77 #else 78 if (raw_bootcount_load(reg + 4) != BOOTCOUNT_MAGIC) 79 return 0; 80 else 81 return raw_bootcount_load(reg); 82 #endif 83 } 84 #endif 85