1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_SH_SUSPEND_H
3 #define _ASM_SH_SUSPEND_H
4 
5 #ifndef __ASSEMBLY__
6 #include <linux/notifier.h>
7 
8 #include <asm/ptrace.h>
9 
10 struct swsusp_arch_regs {
11 	struct pt_regs user_regs;
12 	unsigned long bank1_regs[8];
13 };
14 
15 void sh_mobile_call_standby(unsigned long mode);
16 
17 #ifdef CONFIG_CPU_IDLE
18 int sh_mobile_setup_cpuidle(void);
19 #else
sh_mobile_setup_cpuidle(void)20 static inline int sh_mobile_setup_cpuidle(void) { return 0; }
21 #endif
22 
23 /* notifier chains for pre/post sleep hooks */
24 extern struct atomic_notifier_head sh_mobile_pre_sleep_notifier_list;
25 extern struct atomic_notifier_head sh_mobile_post_sleep_notifier_list;
26 
27 /* priority levels for notifiers */
28 #define SH_MOBILE_SLEEP_BOARD	0
29 #define SH_MOBILE_SLEEP_CPU	1
30 #define SH_MOBILE_PRE(x)	(x)
31 #define SH_MOBILE_POST(x)	(-(x))
32 
33 /* board code registration function for self-refresh assembly snippets */
34 void sh_mobile_register_self_refresh(unsigned long flags,
35 				     void *pre_start, void *pre_end,
36 				     void *post_start, void *post_end);
37 
38 /* register structure for address/data information */
39 struct sh_sleep_regs {
40 	unsigned long stbcr;
41 	unsigned long bar;
42 
43 	/* MMU */
44 	unsigned long pteh;
45 	unsigned long ptel;
46 	unsigned long ttb;
47 	unsigned long tea;
48 	unsigned long mmucr;
49 	unsigned long ptea;
50 	unsigned long pascr;
51 	unsigned long irmcr;
52 
53 	/* Cache */
54 	unsigned long ccr;
55 	unsigned long ramcr;
56 };
57 
58 /* data area for low-level sleep code */
59 struct sh_sleep_data {
60 	/* current sleep mode (SUSP_SH_...) */
61 	unsigned long mode;
62 
63 	/* addresses of board specific self-refresh snippets */
64 	unsigned long sf_pre;
65 	unsigned long sf_post;
66 
67 	/* address of resume code */
68 	unsigned long resume;
69 
70 	/* register state saved and restored by the assembly code */
71 	unsigned long vbr;
72 	unsigned long spc;
73 	unsigned long sr;
74 	unsigned long sp;
75 
76 	/* structure for keeping register addresses */
77 	struct sh_sleep_regs addr;
78 
79 	/* structure for saving/restoring register state */
80 	struct sh_sleep_regs data;
81 };
82 
83 /* a bitmap of supported sleep modes (SUSP_SH..) */
84 extern unsigned long sh_mobile_sleep_supported;
85 
86 #endif
87 
88 /* flags passed to assembly suspend code */
89 #define SUSP_SH_SLEEP		(1 << 0) /* Regular sleep mode */
90 #define SUSP_SH_STANDBY		(1 << 1) /* SH-Mobile Software standby mode */
91 #define SUSP_SH_RSTANDBY	(1 << 2) /* SH-Mobile R-standby mode */
92 #define SUSP_SH_USTANDBY	(1 << 3) /* SH-Mobile U-standby mode */
93 #define SUSP_SH_SF		(1 << 4) /* Enable self-refresh */
94 #define SUSP_SH_MMU		(1 << 5) /* Save/restore MMU and cache */
95 #define SUSP_SH_REGS		(1 << 6) /* Save/restore registers */
96 
97 #endif /* _ASM_SH_SUSPEND_H */
98