LXR linux/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
  10struct swsusp_arch_regs {
  11        struct pt_regs user_regs;
  12        unsigned long bank1_regs[8];
  13};
  14
  15void sh_mobile_call_standby(unsigned long mode);
  16
  17#ifdef CONFIG_CPU_IDLE
  18int sh_mobile_setup_cpuidle(void);
  19#else
  20static inline int sh_mobile_setup_cpuidle(void) { return 0; }
  21#endif
  22
  23/* notifier chains for pre/post sleep hooks */
  24extern struct atomic_notifier_head sh_mobile_pre_sleep_notifier_list;
  25extern 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 */
  34void 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 */
  39struct 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 */
  59struct 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..) */
  84extern 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