include/asm-ppc/machdep.h

   1 #ifdef __KERNEL__
   2 #ifndef _PPC_MACHDEP_H
   3 #define _PPC_MACHDEP_H
   4
   5 #include <linux/config.h>
   6 #include <linux/init.h>
   7 #include <linux/kexec.h>
   8
   9 #include <asm/setup.h>
  10 #include <asm/page.h>
  11
  12 #ifdef CONFIG_APUS
  13 #include <asm-m68k/machdep.h>
  14 #endif
  15
  16 struct pt_regs;
  17 struct pci_bus;
  18 struct pci_dev;
  19 struct seq_file;
  20 struct file;
  21
  22 /*
  23  * This is for compatibility with ARCH=powerpc.
  24  */
  25 #define machine_is(x)   __MACHINE_IS_##x
  26 #define __MACHINE_IS_powermac   0
  27 #define __MACHINE_IS_chrp       0
  28 #ifdef CONFIG_PPC_PREP
  29 #define __MACHINE_IS_prep       1
  30 #else
  31 #define __MACHINE_IS_prep       0
  32 #endif
  33
  34 /* We export this macro for external modules like Alsa to know if
  35  * ppc_md.feature_call is implemented or not
  36  */
  37 #define CONFIG_PPC_HAS_FEATURE_CALLS
  38
  39 struct machdep_calls {
  40         void            (*setup_arch)(void);
  41         /* Optional, may be NULL. */
  42         int             (*show_cpuinfo)(struct seq_file *m);
  43         int             (*show_percpuinfo)(struct seq_file *m, int i);
  44         /* Optional, may be NULL. */
  45         unsigned int    (*irq_canonicalize)(unsigned int irq);
  46         void            (*init_IRQ)(void);
  47         int             (*get_irq)(struct pt_regs *);
  48
  49         /* A general init function, called by ppc_init in init/main.c.
  50            May be NULL. DEPRECATED ! */
  51         void            (*init)(void);
  52         /* For compatibility with merged platforms */
  53         void            (*init_early)(void);
  54
  55         void            (*restart)(char *cmd);
  56         void            (*power_off)(void);
  57         void            (*halt)(void);
  58
  59         void            (*idle_loop)(void);
  60         void            (*power_save)(void);
  61
  62         long            (*time_init)(void); /* Optional, may be NULL */
  63         int             (*set_rtc_time)(unsigned long nowtime);
  64         unsigned long   (*get_rtc_time)(void);
  65         unsigned char   (*rtc_read_val)(int addr);
  66         void            (*rtc_write_val)(int addr, unsigned char val);
  67         void            (*calibrate_decr)(void);
  68
  69         void            (*heartbeat)(void);
  70         unsigned long   heartbeat_reset;
  71         unsigned long   heartbeat_count;
  72
  73         unsigned long   (*find_end_of_memory)(void);
  74         void            (*setup_io_mappings)(void);
  75
  76         void            (*early_serial_map)(void);
  77         void            (*progress)(char *, unsigned short);
  78         void            (*kgdb_map_scc)(void);
  79
  80         unsigned char   (*nvram_read_val)(int addr);
  81         void            (*nvram_write_val)(int addr, unsigned char val);
  82         void            (*nvram_sync)(void);
  83
  84         /*
  85          * optional PCI "hooks"
  86          */
  87
  88         /* Called after scanning the bus, before allocating resources */
  89         void (*pcibios_fixup)(void);
  90
  91         /* Called after PPC generic resource fixup to perform
  92            machine specific fixups */
  93         void (*pcibios_fixup_resources)(struct pci_dev *);
  94
  95         /* Called for each PCI bus in the system when it's probed */
  96         void (*pcibios_fixup_bus)(struct pci_bus *);
  97
  98         /* Called when pci_enable_device() is called (initial=0) or
  99          * when a device with no assigned resource is found (initial=1).
 100          * Returns 0 to allow assignment/enabling of the device. */
 101         int  (*pcibios_enable_device_hook)(struct pci_dev *, int initial);
 102
 103         /* For interrupt routing */
 104         unsigned char (*pci_swizzle)(struct pci_dev *, unsigned char *);
 105         int (*pci_map_irq)(struct pci_dev *, unsigned char, unsigned char);
 106
 107         /* Called in indirect_* to avoid touching devices */
 108         int (*pci_exclude_device)(unsigned char, unsigned char);
 109
 110         /* Called at then very end of pcibios_init() */
 111         void (*pcibios_after_init)(void);
 112
 113         /* Get access protection for /dev/mem */
 114         pgprot_t        (*phys_mem_access_prot)(struct file *file,
 115                                                 unsigned long pfn,
 116                                                 unsigned long size,
 117                                                 pgprot_t vma_prot);
 118
 119         /* Motherboard/chipset features. This is a kind of general purpose
 120          * hook used to control some machine specific features (like reset
 121          * lines, chip power control, etc...).
 122          */
 123         long (*feature_call)(unsigned int feature, ...);
 124
 125 #ifdef CONFIG_SMP
 126         /* functions for dealing with other cpus */
 127         struct smp_ops_t *smp_ops;
 128 #endif /* CONFIG_SMP */
 129
 130 #ifdef CONFIG_KEXEC
 131         /* Called to shutdown machine specific hardware not already controlled
 132          * by other drivers.
 133          * XXX Should we move this one out of kexec scope?
 134          */
 135         void (*machine_shutdown)(void);
 136
 137         /* Called to do the minimal shutdown needed to run a kexec'd kernel
 138          * to run successfully.
 139          * XXX Should we move this one out of kexec scope?
 140          */
 141         void (*machine_crash_shutdown)(void);
 142
 143         /* Called to do what every setup is needed on image and the
 144          * reboot code buffer. Returns 0 on success.
 145          * Provide your own (maybe dummy) implementation if your platform
 146          * claims to support kexec.
 147          */
 148         int (*machine_kexec_prepare)(struct kimage *image);
 149
 150         /* Called to handle any machine specific cleanup on image */
 151         void (*machine_kexec_cleanup)(struct kimage *image);
 152
 153         /* Called to perform the _real_ kexec.
 154          * Do NOT allocate memory or fail here. We are past the point of
 155          * no return.
 156          */
 157         void (*machine_kexec)(struct kimage *image);
 158 #endif /* CONFIG_KEXEC */
 159 };
 160
 161 extern struct machdep_calls ppc_md;
 162 extern char cmd_line[COMMAND_LINE_SIZE];
 163
 164 extern void setup_pci_ptrs(void);
 165
 166 #ifdef CONFIG_SMP
 167 struct smp_ops_t {
 168         void  (*message_pass)(int target, int msg);
 169         int   (*probe)(void);
 170         void  (*kick_cpu)(int nr);
 171         void  (*setup_cpu)(int nr);
 172         void  (*space_timers)(int nr);
 173         void  (*take_timebase)(void);
 174         void  (*give_timebase)(void);
 175 };
 176
 177 /* Poor default implementations */
 178 extern void __devinit smp_generic_give_timebase(void);
 179 extern void __devinit smp_generic_take_timebase(void);
 180 #endif /* CONFIG_SMP */
 181
 182 #endif /* _PPC_MACHDEP_H */
 183 #endif /* __KERNEL__ */