| /* |
| * (C) Copyright 2010-2012 |
| * Stefan Roese, DENX Software Engineering, sr@denx.de. |
| * |
| * SPDX-License-Identifier: GPL-2.0+ |
| */ |
| |
| #include <bootcount.h> |
| #include <linux/compiler.h> |
| |
| /* |
| * Only override CONFIG_SYS_BOOTCOUNT_ADDR if not already defined. This |
| * way, some boards can define it directly in their config header. |
| */ |
| #if !defined(CONFIG_SYS_BOOTCOUNT_ADDR) |
| |
| #if defined(CONFIG_QE) |
| #include <linux/immap_qe.h> |
| #define CONFIG_SYS_BOOTCOUNT_ADDR (CONFIG_SYS_IMMR + 0x110000 + \ |
| QE_MURAM_SIZE - 2 * sizeof(u32)) |
| #endif /* defined(CONFIG_QE) */ |
| |
| #endif /* !defined(CONFIG_SYS_BOOTCOUNT_ADDR) */ |
| |
| /* Now implement the generic default functions */ |
| #if defined(CONFIG_SYS_BOOTCOUNT_ADDR) |
| __weak void bootcount_store(ulong a) |
| { |
| void *reg = (void *)CONFIG_SYS_BOOTCOUNT_ADDR; |
| |
| #if defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD) |
| raw_bootcount_store(reg, (BOOTCOUNT_MAGIC & 0xffff0000) | a); |
| #else |
| raw_bootcount_store(reg, a); |
| raw_bootcount_store(reg + 4, BOOTCOUNT_MAGIC); |
| #endif /* defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD */ |
| } |
| |
| __weak ulong bootcount_load(void) |
| { |
| void *reg = (void *)CONFIG_SYS_BOOTCOUNT_ADDR; |
| |
| #if defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD) |
| u32 tmp = raw_bootcount_load(reg); |
| |
| if ((tmp & 0xffff0000) != (BOOTCOUNT_MAGIC & 0xffff0000)) |
| return 0; |
| else |
| return (tmp & 0x0000ffff); |
| #else |
| if (raw_bootcount_load(reg + 4) != BOOTCOUNT_MAGIC) |
| return 0; |
| else |
| return raw_bootcount_load(reg); |
| #endif /* defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD) */ |
| } |
| #endif /* defined(CONFIG_SYS_BOOTCOUNT_ADDR) */ |