1*0044c42eSStefan Roese /* 2*0044c42eSStefan Roese * (C) Copyright 2011 3*0044c42eSStefan Roese * Heiko Schocher, DENX Software Engineering, hs@denx.de. 4*0044c42eSStefan Roese * 5*0044c42eSStefan Roese * See file CREDITS for list of people who contributed to this 6*0044c42eSStefan Roese * project. 7*0044c42eSStefan Roese * 8*0044c42eSStefan Roese * This program is free software; you can redistribute it and/or 9*0044c42eSStefan Roese * modify it under the terms of the GNU General Public License as 10*0044c42eSStefan Roese * published by the Free Software Foundation; either version 2 of 11*0044c42eSStefan Roese * the License, or (at your option) any later version. 12*0044c42eSStefan Roese * 13*0044c42eSStefan Roese * This program is distributed in the hope that it will be useful, 14*0044c42eSStefan Roese * but WITHOUT ANY WARRANTY; without even the implied warranty of 15*0044c42eSStefan Roese * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16*0044c42eSStefan Roese * GNU General Public License for more details. 17*0044c42eSStefan Roese * 18*0044c42eSStefan Roese */ 19*0044c42eSStefan Roese 20*0044c42eSStefan Roese #include <bootcount.h> 21*0044c42eSStefan Roese #include <asm/arch/da850_lowlevel.h> 22*0044c42eSStefan Roese #include <asm/arch/davinci_misc.h> 23*0044c42eSStefan Roese 24*0044c42eSStefan Roese void bootcount_store(ulong a) 25*0044c42eSStefan Roese { 26*0044c42eSStefan Roese struct davinci_rtc *reg = 27*0044c42eSStefan Roese (struct davinci_rtc *)CONFIG_SYS_BOOTCOUNT_ADDR; 28*0044c42eSStefan Roese 29*0044c42eSStefan Roese /* 30*0044c42eSStefan Roese * write RTC kick register to enable write 31*0044c42eSStefan Roese * for RTC Scratch registers. Scratch0 and 1 are 32*0044c42eSStefan Roese * used for bootcount values. 33*0044c42eSStefan Roese */ 34*0044c42eSStefan Roese writel(RTC_KICK0R_WE, ®->kick0r); 35*0044c42eSStefan Roese writel(RTC_KICK1R_WE, ®->kick1r); 36*0044c42eSStefan Roese raw_bootcount_store(®->scratch0, a); 37*0044c42eSStefan Roese raw_bootcount_store(®->scratch1, BOOTCOUNT_MAGIC); 38*0044c42eSStefan Roese } 39*0044c42eSStefan Roese 40*0044c42eSStefan Roese ulong bootcount_load(void) 41*0044c42eSStefan Roese { 42*0044c42eSStefan Roese struct davinci_rtc *reg = 43*0044c42eSStefan Roese (struct davinci_rtc *)CONFIG_SYS_BOOTCOUNT_ADDR; 44*0044c42eSStefan Roese 45*0044c42eSStefan Roese if (raw_bootcount_load(®->scratch1) != BOOTCOUNT_MAGIC) 46*0044c42eSStefan Roese return 0; 47*0044c42eSStefan Roese else 48*0044c42eSStefan Roese return raw_bootcount_load(®->scratch0); 49*0044c42eSStefan Roese } 50