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 #ifdef CONFIG_APUS
  12 #include <asm-m68k/machdep.h>
  13 #endif
  14
  15 struct pt_regs;
  16 struct pci_bus;
  17 struct pci_dev;
  18 struct seq_file;
  19 struct file;
  20
  21 /*
  22  * This is for compatibility with ARCH=powerpc.
  23  */
  24 #define machine_is(x)   __MACHINE_IS_##x
  25 #define __MACHINE_IS_powermac   0
  26 #define __MACHINE_IS_chrp       0
  27 #ifdef CONFIG_PPC_PREP
  28 #define __MACHINE_IS_prep       1
  29 #else
  30 #define __MACHINE_IS_prep       0
  31 #endif
  32
  33 /* We export this macro for external modules like Alsa to know if
  34  * ppc_md.feature_call is implemented or not
  35  */
  36 #define CONFIG_PPC_HAS_FEATURE_CALLS
  37
  38 struct machdep_calls {
  39         void            (*setup_arch)(void);
  40         /* Optional, may be NULL. */
  41         int             (*show_cpuinfo)(struct seq_file *m);
  42         int             (*show_percpuinfo)(struct seq_file *m, int i);
  43         /* Optional, may be NULL. */
  44         unsigned int    (*irq_canonicalize)(unsigned int irq);
  45         void            (*init_IRQ)(void);
  46         int             (*get_irq)(struct pt_regs *);
  47
  48         /* A general init function, called by ppc_init in init/main.c.
  49            May be NULL. DEPRECATED ! */
  50         void            (*init)(void);
  51         /* For compatibility with merged platforms */
  52         void            (*init_early)(void);
  53
  54         void            (*restart)(char *cmd);
  55         void            (*power_off)(void);
  56         void            (*halt)(void);
  57
  58         void            (*idle_loop)(void);
  59         void            (*power_save)(void);
  60
  61         long            (*time_init)(void); /* Optional, may be NULL */
  62         int             (*set_rtc_time)(unsigned long nowtime);
  63         unsigned long   (*get_rtc_time)(void);
  64         unsigned char   (*rtc_read_val)(int addr);
  65         void            (*rtc_write_val)(int addr, unsigned char val);
  66         void            (*calibrate_decr)(void);
  67
  68         void            (*heartbeat)(void);
  69         unsigned long   heartbeat_reset;
  70         unsigned long   heartbeat_count;
  71
  72         unsigned long   (*find_end_of_memory)(void);
  73         void            (*setup_io_mappings)(void);
  74
  75         void            (*early_serial_map)(void);
  76         void            (*progress)(char *, unsigned short);
  77         void            (*kgdb_map_scc)(void);
  78
  79         unsigned char   (*nvram_read_val)(int addr);
  80         void            (*nvram_write_val)(int addr, unsigned char val);
  81         void            (*nvram_sync)(void);
  82
  83         /*
  84          * optional PCI "hooks"
  85          */
  86
  87         /* Called after scanning the bus, before allocating resources */
  88         void (*pcibios_fixup)(void);
  89
  90         /* Called after PPC generic resource fixup to perform
  91            machine specific fixups */
  92         void (*pcibios_fixup_resources)(struct pci_dev *);
  93
  94         /* Called for each PCI bus in the system when it's probed */
  95         void (*pcibios_fixup_bus)(struct pci_bus *);
  96
  97         /* Called when pci_enable_device() is called (initial=0) or
  98          * when a device with no assigned resource is found (initial=1).
  99          * Returns 0 to allow assignment/enabling of the device. */
 100         int  (*pcibios_enable_device_hook)(struct pci_dev *, int initial);
 101
 102         /* For interrupt routing */
 103         unsigned char (*pci_swizzle)(struct pci_dev *, unsigned char *);
 104         int (*pci_map_irq)(struct pci_dev *, unsigned char, unsigned char);
 105
 106         /* Called in indirect_* to avoid touching devices */
 107         int (*pci_exclude_device)(unsigned char, unsigned char);
 108
 109         /* Called at then very end of pcibios_init() */
 110         void (*pcibios_after_init)(void);
 111
 112         /* Get access protection for /dev/mem */
 113         pgprot_t        (*phys_mem_access_prot)(struct file *file,
 114                                                 unsigned long pfn,
 115                                                 unsigned long size,
 116                                                 pgprot_t vma_prot);
 117
 118         /* Motherboard/chipset features. This is a kind of general purpose
 119          * hook used to control some machine specific features (like reset
 120          * lines, chip power control, etc...).
 121          */
 122         long (*feature_call)(unsigned int feature, ...);
 123
 124 #ifdef CONFIG_SMP
 125         /* functions for dealing with other cpus */
 126         struct smp_ops_t *smp_ops;
 127 #endif /* CONFIG_SMP */
 128
 129 #ifdef CONFIG_KEXEC
 130         /* Called to shutdown machine specific hardware not already controlled
 131          * by other drivers.
 132          * XXX Should we move this one out of kexec scope?
 133          */
 134         void (*machine_shutdown)(void);
 135
 136         /* Called to do the minimal shutdown needed to run a kexec'd kernel
 137          * to run successfully.
 138          * XXX Should we move this one out of kexec scope?
 139          */
 140         void (*machine_crash_shutdown)(void);
 141
 142         /* Called to do what every setup is needed on image and the
 143          * reboot code buffer. Returns 0 on success.
 144          * Provide your own (maybe dummy) implementation if your platform
 145          * claims to support kexec.
 146          */
 147         int (*machine_kexec_prepare)(struct kimage *image);
 148
 149         /* Called to handle any machine specific cleanup on image */
 150         void (*machine_kexec_cleanup)(struct kimage *image);
 151
 152         /* Called to perform the _real_ kexec.
 153          * Do NOT allocate memory or fail here. We are past the point of
 154          * no return.
 155          */
 156         void (*machine_kexec)(struct kimage *image);
 157 #endif /* CONFIG_KEXEC */
 158 };
 159
 160 extern struct machdep_calls ppc_md;
 161 extern char cmd_line[COMMAND_LINE_SIZE];
 162
 163 extern void setup_pci_ptrs(void);
 164
 165 #ifdef CONFIG_SMP
 166 struct smp_ops_t {
 167         void  (*message_pass)(int target, int msg);
 168         int   (*probe)(void);
 169         void  (*kick_cpu)(int nr);
 170         void  (*setup_cpu)(int nr);
 171         void  (*space_timers)(int nr);
 172         void  (*take_timebase)(void);
 173         void  (*give_timebase)(void);
 174 };
 175
 176 /* Poor default implementations */
 177 extern void __devinit smp_generic_give_timebase(void);
 178 extern void __devinit smp_generic_take_timebase(void);
 179 #endif /* CONFIG_SMP */
 180
 181 #endif /* _PPC_MACHDEP_H */
 182 #endif /* __KERNEL__ */