arch/sh/include/asm/suspend.h

   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
  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 */