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_MPC5xxx)
18 #define CONFIG_SYS_BOOTCOUNT_ADDR	(MPC5XXX_CDM_BRDCRMB)
19 #define CONFIG_SYS_BOOTCOUNT_SINGLEWORD
20 #endif /* defined(CONFIG_MPC5xxx) */
21 
22 #if defined(CONFIG_MPC512X)
23 #define CONFIG_SYS_BOOTCOUNT_ADDR	(&((immap_t *)CONFIG_SYS_IMMR)->clk.bcr)
24 #define CONFIG_SYS_BOOTCOUNT_SINGLEWORD
25 #endif /* defined(CONFIG_MPC512X) */
26 
27 #if defined(CONFIG_8xx)
28 #define CONFIG_SYS_BOOTCOUNT_ADDR (((immap_t *)CONFIG_SYS_IMMR)->im_cpm.cp_dpmem + \
29 				CPM_BOOTCOUNT_ADDR)
30 #endif /* defined(CONFIG_8xx) */
31 
32 #if defined(CONFIG_MPC8260)
33 #include <asm/cpm_8260.h>
34 
35 #define CONFIG_SYS_BOOTCOUNT_ADDR	(CONFIG_SYS_IMMR + CPM_BOOTCOUNT_ADDR)
36 #endif /* defined(CONFIG_MPC8260) */
37 
38 #if defined(CONFIG_QE)
39 #include <asm/immap_qe.h>
40 
41 #define CONFIG_SYS_BOOTCOUNT_ADDR	(CONFIG_SYS_IMMR + 0x110000 + \
42 					 QE_MURAM_SIZE - 2 * sizeof(u32))
43 #endif /* defined(CONFIG_MPC8360) */
44 
45 #if defined(CONFIG_4xx)
46 #define CONFIG_SYS_BOOTCOUNT_ADDR	(CONFIG_SYS_OCM_DATA_ADDR + \
47 				CONFIG_SYS_BOOTCOUNT_ADDR)
48 #endif /* defined(CONFIG_4xx) */
49 
50 #endif /* !defined(CONFIG_SYS_BOOTCOUNT_ADDR) */
51 
52 /* Now implement the generic default functions */
53 #if defined(CONFIG_SYS_BOOTCOUNT_ADDR)
54 __weak void bootcount_store(ulong a)
55 {
56 	void *reg = (void *)CONFIG_SYS_BOOTCOUNT_ADDR;
57 
58 #if defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD)
59 	raw_bootcount_store(reg, (BOOTCOUNT_MAGIC & 0xffff0000) | a);
60 #else
61 	raw_bootcount_store(reg, a);
62 	raw_bootcount_store(reg + 4, BOOTCOUNT_MAGIC);
63 #endif
64 }
65 
66 __weak ulong bootcount_load(void)
67 {
68 	void *reg = (void *)CONFIG_SYS_BOOTCOUNT_ADDR;
69 
70 #if defined(CONFIG_SYS_BOOTCOUNT_SINGLEWORD)
71 	u32 tmp = raw_bootcount_load(reg);
72 
73 	if ((tmp & 0xffff0000) != (BOOTCOUNT_MAGIC & 0xffff0000))
74 		return 0;
75 	else
76 		return (tmp & 0x0000ffff);
77 #else
78 	if (raw_bootcount_load(reg + 4) != BOOTCOUNT_MAGIC)
79 		return 0;
80 	else
81 		return raw_bootcount_load(reg);
82 #endif
83 }
84 #endif
85