| /* |
| * 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; |
| } |
