]> git.sur5r.net Git - u-boot/blob - drivers/bootcount/bootcount.c
Merge git://www.denx.de/git/u-boot-imx
[u-boot] / drivers / bootcount / bootcount.c
1 /*
2  * (C) Copyright 2010-2012
3  * Stefan Roese, DENX Software Engineering, sr@denx.de.
4  *
5  * SPDX-License-Identifier:     GPL-2.0+
6  */
7
8 #include <bootcount.h>
9 #include <linux/compiler.h>
10
11 /*
12  * Only override CONFIG_SYS_BOOTCOUNT_ADDR if not already defined. This
13  * way, some boards can define it directly in their config header.
14  */
15 #if !defined(CONFIG_SYS_BOOTCOUNT_ADDR)
16
17 #if defined(CONFIG_QE)
18 #include <linux/immap_qe.h>
19 #define CONFIG_SYS_BOOTCOUNT_ADDR       (CONFIG_SYS_IMMR + 0x110000 + \
20                                          QE_MURAM_SIZE - 2 * sizeof(u32))
21 #endif /* defined(CONFIG_QE) */
22
23 #endif /* !defined(CONFIG_SYS_BOOTCOUNT_ADDR) */
24
25 /* Now implement the generic default functions */
26 #if defined(CONFIG_SYS_BOOTCOUNT_ADDR)
27 __weak void bootcount_store(ulong a)
28 {
29         void *reg = (void *)CONFIG_SYS_BOOTCOUNT_ADDR;
30
31 #if defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD)
32         raw_bootcount_store(reg, (BOOTCOUNT_MAGIC & 0xffff0000) | a);
33 #else
34         raw_bootcount_store(reg, a);
35         raw_bootcount_store(reg + 4, BOOTCOUNT_MAGIC);
36 #endif /* defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD */
37 }
38
39 __weak ulong bootcount_load(void)
40 {
41         void *reg = (void *)CONFIG_SYS_BOOTCOUNT_ADDR;
42
43 #if defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD)
44         u32 tmp = raw_bootcount_load(reg);
45
46         if ((tmp & 0xffff0000) != (BOOTCOUNT_MAGIC & 0xffff0000))
47                 return 0;
48         else
49                 return (tmp & 0x0000ffff);
50 #else
51         if (raw_bootcount_load(reg + 4) != BOOTCOUNT_MAGIC)
52                 return 0;
53         else
54                 return raw_bootcount_load(reg);
55 #endif /* defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD) */
56 }
57 #endif /* defined(CONFIG_SYS_BOOTCOUNT_ADDR) */