1*4882a593Smuzhiyun /* 2*4882a593Smuzhiyun * (C) Copyright 2010-2012 3*4882a593Smuzhiyun * Stefan Roese, DENX Software Engineering, sr@denx.de. 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+ 6*4882a593Smuzhiyun */ 7*4882a593Smuzhiyun 8*4882a593Smuzhiyun #include <bootcount.h> 9*4882a593Smuzhiyun #include <linux/compiler.h> 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun /* 12*4882a593Smuzhiyun * Only override CONFIG_SYS_BOOTCOUNT_ADDR if not already defined. This 13*4882a593Smuzhiyun * way, some boards can define it directly in their config header. 14*4882a593Smuzhiyun */ 15*4882a593Smuzhiyun #if !defined(CONFIG_SYS_BOOTCOUNT_ADDR) 16*4882a593Smuzhiyun 17*4882a593Smuzhiyun #if defined(CONFIG_QE) 18*4882a593Smuzhiyun #include <linux/immap_qe.h> 19*4882a593Smuzhiyun #define CONFIG_SYS_BOOTCOUNT_ADDR (CONFIG_SYS_IMMR + 0x110000 + \ 20*4882a593Smuzhiyun QE_MURAM_SIZE - 2 * sizeof(u32)) 21*4882a593Smuzhiyun #endif /* defined(CONFIG_QE) */ 22*4882a593Smuzhiyun 23*4882a593Smuzhiyun #endif /* !defined(CONFIG_SYS_BOOTCOUNT_ADDR) */ 24*4882a593Smuzhiyun 25*4882a593Smuzhiyun /* Now implement the generic default functions */ 26*4882a593Smuzhiyun #if defined(CONFIG_SYS_BOOTCOUNT_ADDR) bootcount_store(ulong a)27*4882a593Smuzhiyun__weak void bootcount_store(ulong a) 28*4882a593Smuzhiyun { 29*4882a593Smuzhiyun void *reg = (void *)CONFIG_SYS_BOOTCOUNT_ADDR; 30*4882a593Smuzhiyun 31*4882a593Smuzhiyun #if defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD) 32*4882a593Smuzhiyun raw_bootcount_store(reg, (BOOTCOUNT_MAGIC & 0xffff0000) | a); 33*4882a593Smuzhiyun #else 34*4882a593Smuzhiyun raw_bootcount_store(reg, a); 35*4882a593Smuzhiyun raw_bootcount_store(reg + 4, BOOTCOUNT_MAGIC); 36*4882a593Smuzhiyun #endif /* defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD */ 37*4882a593Smuzhiyun } 38*4882a593Smuzhiyun bootcount_load(void)39*4882a593Smuzhiyun__weak ulong bootcount_load(void) 40*4882a593Smuzhiyun { 41*4882a593Smuzhiyun void *reg = (void *)CONFIG_SYS_BOOTCOUNT_ADDR; 42*4882a593Smuzhiyun 43*4882a593Smuzhiyun #if defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD) 44*4882a593Smuzhiyun u32 tmp = raw_bootcount_load(reg); 45*4882a593Smuzhiyun 46*4882a593Smuzhiyun if ((tmp & 0xffff0000) != (BOOTCOUNT_MAGIC & 0xffff0000)) 47*4882a593Smuzhiyun return 0; 48*4882a593Smuzhiyun else 49*4882a593Smuzhiyun return (tmp & 0x0000ffff); 50*4882a593Smuzhiyun #else 51*4882a593Smuzhiyun if (raw_bootcount_load(reg + 4) != BOOTCOUNT_MAGIC) 52*4882a593Smuzhiyun return 0; 53*4882a593Smuzhiyun else 54*4882a593Smuzhiyun return raw_bootcount_load(reg); 55*4882a593Smuzhiyun #endif /* defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD) */ 56*4882a593Smuzhiyun } 57*4882a593Smuzhiyun #endif /* defined(CONFIG_SYS_BOOTCOUNT_ADDR) */ 58