| /* | |
| * functions for handling bootcount support | |
| * | |
| * Copyright (c) 2010 Analog Devices Inc. | |
| * | |
| * Licensed under the 2-clause BSD. | |
| */ | |
| /* This version uses one 32bit storage and combines the magic/count */ | |
| #include <common.h> | |
| /* We abuse the EVT0 MMR for bootcount storage by default */ | |
| #ifndef CONFIG_SYS_BOOTCOUNT_ADDR | |
| # define CONFIG_SYS_BOOTCOUNT_ADDR EVT0 | |
| #endif | |
| #define MAGIC_MASK 0xffff0000 | |
| #define COUNT_MASK 0x0000ffff | |
| void bootcount_store(ulong cnt) | |
| { | |
| ulong magic = (BOOTCOUNT_MAGIC & MAGIC_MASK) | (cnt & COUNT_MASK); | |
| bfin_write32(CONFIG_SYS_BOOTCOUNT_ADDR, magic); | |
| } | |
| ulong bootcount_load(void) | |
| { | |
| ulong magic = bfin_read32(CONFIG_SYS_BOOTCOUNT_ADDR); | |
| if ((magic & MAGIC_MASK) == (BOOTCOUNT_MAGIC & MAGIC_MASK)) | |
| return magic & COUNT_MASK; | |
| else | |
| return 0; | |
| } |