include/asm-ppc/machdep.h

   1 #ifdef __KERNEL__
   2 #ifndef _PPC_MACHDEP_H
   3 #define _PPC_MACHDEP_H
   4
   5 #include <linux/init.h>
   6 #include <linux/kexec.h>
   7
   8 #include <asm/setup.h>
   9 #include <asm/page.h>
  10
  11 struct pt_regs;
  12 struct pci_bus;
  13 struct pci_dev;
  14 struct seq_file;
  15 struct file;
  16
  17 /*
  18  * This is for compatibility with ARCH=powerpc.
  19  */
  20 #define machine_is(x)   __MACHINE_IS_##x
  21 #define __MACHINE_IS_powermac   0
  22 #define __MACHINE_IS_chrp       0
  23 #ifdef CONFIG_PPC_PREP
  24 #define __MACHINE_IS_prep       1
  25 #else
  26 #define __MACHINE_IS_prep       0
  27 #endif
  28
  29 /* We export this macro for external modules like Alsa to know if
  30  * ppc_md.feature_call is implemented or not
  31  */
  32 #define CONFIG_PPC_HAS_FEATURE_CALLS
  33
  34 struct machdep_calls {
  35         void            (*setup_arch)(void);
  36         /* Optional, may be NULL. */
  37         int             (*show_cpuinfo)(struct seq_file *m);
  38         int             (*show_percpuinfo)(struct seq_file *m, int i);
  39         /* Optional, may be NULL. */
  40         unsigned int    (*irq_canonicalize)(unsigned int irq);
  41         void            (*init_IRQ)(void);
  42         int             (*get_irq)(void);
  43
  44         /* A general init function, called by ppc_init in init/main.c.
  45            May be NULL. DEPRECATED ! */
  46         void            (*init)(void);
  47         /* For compatibility with merged platforms */
  48         void            (*init_early)(void);
  49
  50         void            (*restart)(char *cmd);
  51         void            (*power_off)(void);
  52         void            (*halt)(void);
  53
  54         void            (*idle_loop)(void);
  55         void            (*power_save)(void);
  56
  57         long            (*time_init)(void); /* Optional, may be NULL */
  58         int             (*set_rtc_time)(unsigned long nowtime);
  59         unsigned long   (*get_rtc_time)(void);
  60         unsigned char   (*rtc_read_val)(int addr);
  61         void            (*rtc_write_val)(int addr, unsigned char val);
  62         void            (*calibrate_decr)(void);
  63
  64         void            (*heartbeat)(void);
  65         unsigned long   heartbeat_reset;
  66         unsigned long   heartbeat_count;
  67
  68         unsigned long   (*find_end_of_memory)(void);
  69         void            (*setup_io_mappings)(void);
  70
  71         void            (*early_serial_map)(void);
  72         void            (*progress)(char *, unsigned short);
  73         void            (*kgdb_map_scc)(void);
  74
  75         unsigned char   (*nvram_read_val)(int addr);
  76         void            (*nvram_write_val)(int addr, unsigned char val);
  77         void            (*nvram_sync)(void);
  78
  79         /*
  80          * optional PCI "hooks"
  81          */
  82
  83         /* Called after scanning the bus, before allocating resources */
  84         void (*pcibios_fixup)(void);
  85
  86         /* Called after PPC generic resource fixup to perform
  87            machine specific fixups */
  88         void (*pcibios_fixup_resources)(struct pci_dev *);
  89
  90         /* Called for each PCI bus in the system when it's probed */
  91         void (*pcibios_fixup_bus)(struct pci_bus *);
  92
  93         /* Called when pci_enable_device() is called (initial=0) or
  94          * when a device with no assigned resource is found (initial=1).
  95          * Returns 0 to allow assignment/enabling of the device. */
  96         int  (*pcibios_enable_device_hook)(struct pci_dev *, int initial);
  97
  98         /* For interrupt routing */
  99         unsigned char (*pci_swizzle)(struct pci_dev *, unsigned char *);
 100         int (*pci_map_irq)(struct pci_dev *, unsigned char, unsigned char);
 101
 102         /* Called in indirect_* to avoid touching devices */
 103         int (*pci_exclude_device)(unsigned char, unsigned char);
 104
 105         /* Called at then very end of pcibios_init() */
 106         void (*pcibios_after_init)(void);
 107
 108         /* Get access protection for /dev/mem */
 109         pgprot_t        (*phys_mem_access_prot)(struct file *file,
 110                                                 unsigned long pfn,
 111                                                 unsigned long size,
 112                                                 pgprot_t vma_prot);
 113
 114         /* Motherboard/chipset features. This is a kind of general purpose
 115          * hook used to control some machine specific features (like reset
 116          * lines, chip power control, etc...).
 117          */
 118         long (*feature_call)(unsigned int feature, ...);
 119
 120 #ifdef CONFIG_SMP
 121         /* functions for dealing with other cpus */
 122         struct smp_ops_t *smp_ops;
 123 #endif /* CONFIG_SMP */
 124
 125 #ifdef CONFIG_KEXEC
 126         /* Called to shutdown machine specific hardware not already controlled
 127          * by other drivers.
 128          * XXX Should we move this one out of kexec scope?
 129          */
 130         void (*machine_shutdown)(void);
 131
 132         /* Called to do the minimal shutdown needed to run a kexec'd kernel
 133          * to run successfully.
 134          * XXX Should we move this one out of kexec scope?
 135          */
 136         void (*machine_crash_shutdown)(void);
 137
 138         /* Called to do what every setup is needed on image and the
 139          * reboot code buffer. Returns 0 on success.
 140          * Provide your own (maybe dummy) implementation if your platform
 141          * claims to support kexec.
 142          */
 143         int (*machine_kexec_prepare)(struct kimage *image);
 144
 145         /* Called to handle any machine specific cleanup on image */
 146         void (*machine_kexec_cleanup)(struct kimage *image);
 147
 148         /* Called to perform the _real_ kexec.
 149          * Do NOT allocate memory or fail here. We are past the point of
 150          * no return.
 151          */
 152         void (*machine_kexec)(struct kimage *image);
 153 #endif /* CONFIG_KEXEC */
 154 };
 155
 156 extern struct machdep_calls ppc_md;
 157 extern char cmd_line[COMMAND_LINE_SIZE];
 158
 159 extern void setup_pci_ptrs(void);
 160
 161 #ifdef CONFIG_SMP
 162 struct smp_ops_t {
 163         void  (*message_pass)(int target, int msg);
 164         int   (*probe)(void);
 165         void  (*kick_cpu)(int nr);
 166         void  (*setup_cpu)(int nr);
 167         void  (*space_timers)(int nr);
 168         void  (*take_timebase)(void);
 169         void  (*give_timebase)(void);
 170 };
 171
 172 /* Poor default implementations */
 173 extern void __devinit smp_generic_give_timebase(void);
 174 extern void __devinit smp_generic_take_timebase(void);
 175 #endif /* CONFIG_SMP */
 176
 177 #endif /* _PPC_MACHDEP_H */
 178 #endif /* __KERNEL__ */