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machdep.h

#ifndef _ASM_POWERPC_MACHDEP_H
#define _ASM_POWERPC_MACHDEP_H
#ifdef __KERNEL__

/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */

#include <linux/seq_file.h>
#include <linux/init.h>
#include <linux/dma-mapping.h>

#include <asm/setup.h>

/* We export this macro for external modules like Alsa to know if
 * ppc_md.feature_call is implemented or not
 */
#define CONFIG_PPC_HAS_FEATURE_CALLS

struct pt_regs;
struct pci_bus;   
struct device_node;
struct iommu_table;
struct rtc_time;
struct file;
struct pci_controller;
#ifdef CONFIG_KEXEC
struct kimage;
#endif

#ifdef CONFIG_SMP
struct smp_ops_t {
      void  (*message_pass)(int target, int msg);
      int   (*probe)(void);
      void  (*kick_cpu)(int nr);
      void  (*setup_cpu)(int nr);
      void  (*take_timebase)(void);
      void  (*give_timebase)(void);
      int   (*cpu_enable)(unsigned int nr);
      int   (*cpu_disable)(void);
      void  (*cpu_die)(unsigned int nr);
      int   (*cpu_bootable)(unsigned int nr);
};
#endif

struct machdep_calls {
      char        *name;
#ifdef CONFIG_PPC64
      void            (*hpte_invalidate)(unsigned long slot,
                                 unsigned long va,
                                 int psize, int ssize,
                                 int local);
      long        (*hpte_updatepp)(unsigned long slot, 
                               unsigned long newpp, 
                               unsigned long va,
                               int psize, int ssize,
                               int local);
      void            (*hpte_updateboltedpp)(unsigned long newpp, 
                                     unsigned long ea,
                                     int psize, int ssize);
      long        (*hpte_insert)(unsigned long hpte_group,
                               unsigned long va,
                               unsigned long prpn,
                               unsigned long rflags,
                               unsigned long vflags,
                               int psize, int ssize);
      long        (*hpte_remove)(unsigned long hpte_group);
      void            (*hpte_removebolted)(unsigned long ea,
                                   int psize, int ssize);
      void        (*flush_hash_range)(unsigned long number, int local);

      /* special for kexec, to be called in real mode, linar mapping is
       * destroyed as well */
      void        (*hpte_clear_all)(void);

      int         (*tce_build)(struct iommu_table *tbl,
                             long index,
                             long npages,
                             unsigned long uaddr,
                             enum dma_data_direction direction,
                             struct dma_attrs *attrs);
      void        (*tce_free)(struct iommu_table *tbl,
                            long index,
                            long npages);
      unsigned long     (*tce_get)(struct iommu_table *tbl,
                            long index);
      void        (*tce_flush)(struct iommu_table *tbl);
      void        (*pci_dma_dev_setup)(struct pci_dev *dev);
      void        (*pci_dma_bus_setup)(struct pci_bus *bus);

      void __iomem *    (*ioremap)(phys_addr_t addr, unsigned long size,
                           unsigned long flags);
      void        (*iounmap)(volatile void __iomem *token);

#ifdef CONFIG_PM
      void        (*iommu_save)(void);
      void        (*iommu_restore)(void);
#endif
#endif /* CONFIG_PPC64 */

      int         (*probe)(void);
      void        (*setup_arch)(void); /* Optional, may be NULL */
      void        (*init_early)(void);
      /* Optional, may be NULL. */
      void        (*show_cpuinfo)(struct seq_file *m);
      void        (*show_percpuinfo)(struct seq_file *m, int i);

      void        (*init_IRQ)(void);
      unsigned int      (*get_irq)(void);
#ifdef CONFIG_KEXEC
      void        (*kexec_cpu_down)(int crash_shutdown, int secondary);
#endif

      /* PCI stuff */
      /* Called after scanning the bus, before allocating resources */
      void        (*pcibios_fixup)(void);
      int         (*pci_probe_mode)(struct pci_bus *);
      void        (*pci_irq_fixup)(struct pci_dev *dev);

      /* To setup PHBs when using automatic OF platform driver for PCI */
      int         (*pci_setup_phb)(struct pci_controller *host);

#ifdef CONFIG_PCI_MSI
      int         (*msi_check_device)(struct pci_dev* dev,
                                  int nvec, int type);
      int         (*setup_msi_irqs)(struct pci_dev *dev,
                                int nvec, int type);
      void        (*teardown_msi_irqs)(struct pci_dev *dev);
#endif

      void        (*restart)(char *cmd);
      void        (*power_off)(void);
      void        (*halt)(void);
      void        (*panic)(char *str);
      void        (*cpu_die)(void);

      long        (*time_init)(void); /* Optional, may be NULL */

      int         (*set_rtc_time)(struct rtc_time *);
      void        (*get_rtc_time)(struct rtc_time *);
      unsigned long     (*get_boot_time)(void);
      unsigned char     (*rtc_read_val)(int addr);
      void        (*rtc_write_val)(int addr, unsigned char val);

      void        (*calibrate_decr)(void);

      void        (*progress)(char *, unsigned short);

      /* Interface for platform error logging */
      void        (*log_error)(char *buf, unsigned int err_type, int fatal);

      unsigned char     (*nvram_read_val)(int addr);
      void        (*nvram_write_val)(int addr, unsigned char val);
      ssize_t           (*nvram_write)(char *buf, size_t count, loff_t *index);
      ssize_t           (*nvram_read)(char *buf, size_t count, loff_t *index);      
      ssize_t           (*nvram_size)(void);          
      void        (*nvram_sync)(void);

      /* Exception handlers */
      int         (*system_reset_exception)(struct pt_regs *regs);
      int         (*machine_check_exception)(struct pt_regs *regs);

      /* Motherboard/chipset features. This is a kind of general purpose
       * hook used to control some machine specific features (like reset
       * lines, chip power control, etc...).
       */
      long        (*feature_call)(unsigned int feature, ...);

      /* Get legacy PCI/IDE interrupt mapping */ 
      int         (*pci_get_legacy_ide_irq)(struct pci_dev *dev, int channel);
      
      /* Get access protection for /dev/mem */
      pgprot_t    (*phys_mem_access_prot)(struct file *file,
                                    unsigned long pfn,
                                    unsigned long size,
                                    pgprot_t vma_prot);

      /* Idle loop for this platform, leave empty for default idle loop */
      void        (*idle_loop)(void);

      /*
       * Function for waiting for work with reduced power in idle loop;
       * called with interrupts disabled.
       */
      void        (*power_save)(void);

      /* Function to enable performance monitor counters for this
         platform, called once per cpu. */
      void        (*enable_pmcs)(void);

      /* Set DABR for this platform, leave empty for default implemenation */
      int         (*set_dabr)(unsigned long dabr);

#ifdef CONFIG_PPC32     /* XXX for now */
      /* A general init function, called by ppc_init in init/main.c.
         May be NULL. */
      void        (*init)(void);

      void        (*kgdb_map_scc)(void);

      /*
       * optional PCI "hooks"
       */
      /* Called in indirect_* to avoid touching devices */
      int (*pci_exclude_device)(struct pci_controller *, unsigned char, unsigned char);

      /* Called at then very end of pcibios_init() */
      void (*pcibios_after_init)(void);

#endif /* CONFIG_PPC32 */

      /* Called after PPC generic resource fixup to perform
         machine specific fixups */
      void (*pcibios_fixup_resources)(struct pci_dev *);

      /* Called for each PCI bus in the system when it's probed */
      void (*pcibios_fixup_bus)(struct pci_bus *);

      /* Called when pci_enable_device() is called. Returns 0 to
       * allow assignment/enabling of the device. */
      int  (*pcibios_enable_device_hook)(struct pci_dev *);

      /* Called to shutdown machine specific hardware not already controlled
       * by other drivers.
       */
      void (*machine_shutdown)(void);

#ifdef CONFIG_KEXEC
      /* Called to do the minimal shutdown needed to run a kexec'd kernel
       * to run successfully.
       * XXX Should we move this one out of kexec scope?
       */
      void (*machine_crash_shutdown)(struct pt_regs *regs);

      /* Called to do what every setup is needed on image and the
       * reboot code buffer. Returns 0 on success.
       * Provide your own (maybe dummy) implementation if your platform
       * claims to support kexec.
       */
      int (*machine_kexec_prepare)(struct kimage *image);

      /* Called to handle any machine specific cleanup on image */
      void (*machine_kexec_cleanup)(struct kimage *image);

      /* Called to perform the _real_ kexec.
       * Do NOT allocate memory or fail here. We are past the point of
       * no return.
       */
      void (*machine_kexec)(struct kimage *image);
#endif /* CONFIG_KEXEC */

#ifdef CONFIG_SUSPEND
      /* These are called to disable and enable, respectively, IRQs when
       * entering a suspend state.  If NULL, then the generic versions
       * will be called.  The generic versions disable/enable the
       * decrementer along with interrupts.
       */
      void (*suspend_disable_irqs)(void);
      void (*suspend_enable_irqs)(void);
#endif
};

extern void e500_idle(void);
extern void power4_idle(void);
extern void power4_cpu_offline_powersave(void);
extern void ppc6xx_idle(void);

/*
 * ppc_md contains a copy of the machine description structure for the
 * current platform. machine_id contains the initial address where the
 * description was found during boot.
 */
extern struct machdep_calls ppc_md;
extern struct machdep_calls *machine_id;

#define __machine_desc __attribute__ ((__section__ (".machine.desc")))

#define define_machine(name)                          \
      extern struct machdep_calls mach_##name;        \
      EXPORT_SYMBOL(mach_##name);                     \
      struct machdep_calls mach_##name __machine_desc =

#define machine_is(name) \
      ({ \
            extern struct machdep_calls mach_##name \
                  __attribute__((weak));         \
            machine_id == &mach_##name; \
      })

extern void probe_machine(void);

extern char cmd_line[COMMAND_LINE_SIZE];

#ifdef CONFIG_PPC_PMAC
/*
 * Power macintoshes have either a CUDA, PMU or SMU controlling
 * system reset, power, NVRAM, RTC.
 */
typedef enum sys_ctrler_kind {
      SYS_CTRLER_UNKNOWN = 0,
      SYS_CTRLER_CUDA = 1,
      SYS_CTRLER_PMU = 2,
      SYS_CTRLER_SMU = 3,
} sys_ctrler_t;
extern sys_ctrler_t sys_ctrler;

#endif /* CONFIG_PPC_PMAC */

extern void setup_pci_ptrs(void);

#ifdef CONFIG_SMP
/* Poor default implementations */
extern void __devinit smp_generic_give_timebase(void);
extern void __devinit smp_generic_take_timebase(void);
#endif /* CONFIG_SMP */


/* Functions to produce codes on the leds.
 * The SRC code should be unique for the message category and should
 * be limited to the lower 24 bits (the upper 8 are set by these funcs),
 * and (for boot & dump) should be sorted numerically in the order
 * the events occur.
 */
/* Print a boot progress message. */
void ppc64_boot_msg(unsigned int src, const char *msg);
/* Print a termination message (print only -- does not stop the kernel) */
void ppc64_terminate_msg(unsigned int src, const char *msg);

static inline void log_error(char *buf, unsigned int err_type, int fatal)
{
      if (ppc_md.log_error)
            ppc_md.log_error(buf, err_type, fatal);
}

#define __define_machine_initcall(mach,level,fn,id) \
      static int __init __machine_initcall_##mach##_##fn(void) { \
            if (machine_is(mach)) return fn(); \
            return 0; \
      } \
      __define_initcall(level,__machine_initcall_##mach##_##fn,id);

#define machine_core_initcall(mach,fn)          __define_machine_initcall(mach,"1",fn,1)
#define machine_core_initcall_sync(mach,fn)     __define_machine_initcall(mach,"1s",fn,1s)
#define machine_postcore_initcall(mach,fn)      __define_machine_initcall(mach,"2",fn,2)
#define machine_postcore_initcall_sync(mach,fn) __define_machine_initcall(mach,"2s",fn,2s)
#define machine_arch_initcall(mach,fn)          __define_machine_initcall(mach,"3",fn,3)
#define machine_arch_initcall_sync(mach,fn)     __define_machine_initcall(mach,"3s",fn,3s)
#define machine_subsys_initcall(mach,fn)  __define_machine_initcall(mach,"4",fn,4)
#define machine_subsys_initcall_sync(mach,fn)   __define_machine_initcall(mach,"4s",fn,4s)
#define machine_fs_initcall(mach,fn)            __define_machine_initcall(mach,"5",fn,5)
#define machine_fs_initcall_sync(mach,fn) __define_machine_initcall(mach,"5s",fn,5s)
#define machine_rootfs_initcall(mach,fn)  __define_machine_initcall(mach,"rootfs",fn,rootfs)
#define machine_device_initcall(mach,fn)  __define_machine_initcall(mach,"6",fn,6)
#define machine_device_initcall_sync(mach,fn)   __define_machine_initcall(mach,"6s",fn,6s)
#define machine_late_initcall(mach,fn)          __define_machine_initcall(mach,"7",fn,7)
#define machine_late_initcall_sync(mach,fn)     __define_machine_initcall(mach,"7s",fn,7s)

void generic_suspend_disable_irqs(void);
void generic_suspend_enable_irqs(void);

#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_MACHDEP_H */

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