LXR linux/arch/powerpc/include/asm/machdep.h

   1#ifndef _ASM_POWERPC_MACHDEP_H
   2#define _ASM_POWERPC_MACHDEP_H
   3#ifdef __KERNEL__
   4
   5/*
   6 * This program is free software; you can redistribute it and/or
   7 * modify it under the terms of the GNU General Public License
   8 * as published by the Free Software Foundation; either version
   9 * 2 of the License, or (at your option) any later version.
  10 */
  11
  12#include <linux/seq_file.h>
  13#include <linux/init.h>
  14#include <linux/dma-mapping.h>
  15
  16#include <asm/setup.h>
  17
  18/* We export this macro for external modules like Alsa to know if
  19 * ppc_md.feature_call is implemented or not
  20 */
  21#define CONFIG_PPC_HAS_FEATURE_CALLS
  22
  23struct pt_regs;
  24struct pci_bus; 
  25struct device_node;
  26struct iommu_table;
  27struct rtc_time;
  28struct file;
  29struct pci_controller;
  30struct kimage;
  31
  32#ifdef CONFIG_SMP
  33struct smp_ops_t {
  34        void  (*message_pass)(int target, int msg);
  35        int   (*probe)(void);
  36        void  (*kick_cpu)(int nr);
  37        void  (*setup_cpu)(int nr);
  38        void  (*bringup_done)(void);
  39        void  (*take_timebase)(void);
  40        void  (*give_timebase)(void);
  41        int   (*cpu_disable)(void);
  42        void  (*cpu_die)(unsigned int nr);
  43        int   (*cpu_bootable)(unsigned int nr);
  44};
  45#endif
  46
  47struct machdep_calls {
  48        char            *name;
  49#ifdef CONFIG_PPC64
  50        void            (*hpte_invalidate)(unsigned long slot,
  51                                           unsigned long va,
  52                                           int psize, int ssize,
  53                                           int local);
  54        long            (*hpte_updatepp)(unsigned long slot, 
  55                                         unsigned long newpp, 
  56                                         unsigned long va,
  57                                         int psize, int ssize,
  58                                         int local);
  59        void            (*hpte_updateboltedpp)(unsigned long newpp, 
  60                                               unsigned long ea,
  61                                               int psize, int ssize);
  62        long            (*hpte_insert)(unsigned long hpte_group,
  63                                       unsigned long va,
  64                                       unsigned long prpn,
  65                                       unsigned long rflags,
  66                                       unsigned long vflags,
  67                                       int psize, int ssize);
  68        long            (*hpte_remove)(unsigned long hpte_group);
  69        void            (*hpte_removebolted)(unsigned long ea,
  70                                             int psize, int ssize);
  71        void            (*flush_hash_range)(unsigned long number, int local);
  72
  73        /* special for kexec, to be called in real mode, linear mapping is
  74         * destroyed as well */
  75        void            (*hpte_clear_all)(void);
  76
  77        int             (*tce_build)(struct iommu_table *tbl,
  78                                     long index,
  79                                     long npages,
  80                                     unsigned long uaddr,
  81                                     enum dma_data_direction direction,
  82                                     struct dma_attrs *attrs);
  83        void            (*tce_free)(struct iommu_table *tbl,
  84                                    long index,
  85                                    long npages);
  86        unsigned long   (*tce_get)(struct iommu_table *tbl,
  87                                    long index);
  88        void            (*tce_flush)(struct iommu_table *tbl);
  89
  90        void __iomem *  (*ioremap)(phys_addr_t addr, unsigned long size,
  91                                   unsigned long flags, void *caller);
  92        void            (*iounmap)(volatile void __iomem *token);
  93
  94#ifdef CONFIG_PM
  95        void            (*iommu_save)(void);
  96        void            (*iommu_restore)(void);
  97#endif
  98#endif /* CONFIG_PPC64 */
  99
 100        void            (*pci_dma_dev_setup)(struct pci_dev *dev);
 101        void            (*pci_dma_bus_setup)(struct pci_bus *bus);
 102
 103        /* Platform set_dma_mask override */
 104        int             (*dma_set_mask)(struct device *dev, u64 dma_mask);
 105
 106        int             (*probe)(void);
 107        void            (*setup_arch)(void); /* Optional, may be NULL */
 108        void            (*init_early)(void);
 109        /* Optional, may be NULL. */
 110        void            (*show_cpuinfo)(struct seq_file *m);
 111        void            (*show_percpuinfo)(struct seq_file *m, int i);
 112
 113        void            (*init_IRQ)(void);
 114
 115        /* Return an irq, or NO_IRQ to indicate there are none pending.
 116         * If for some reason there is no irq, but the interrupt
 117         * shouldn't be counted as spurious, return NO_IRQ_IGNORE. */
 118        unsigned int    (*get_irq)(void);
 119
 120        /* PCI stuff */
 121        /* Called after scanning the bus, before allocating resources */
 122        void            (*pcibios_fixup)(void);
 123        int             (*pci_probe_mode)(struct pci_bus *);
 124        void            (*pci_irq_fixup)(struct pci_dev *dev);
 125
 126        /* To setup PHBs when using automatic OF platform driver for PCI */
 127        int             (*pci_setup_phb)(struct pci_controller *host);
 128
 129#ifdef CONFIG_PCI_MSI
 130        int             (*msi_check_device)(struct pci_dev* dev,
 131                                            int nvec, int type);
 132        int             (*setup_msi_irqs)(struct pci_dev *dev,
 133                                          int nvec, int type);
 134        void            (*teardown_msi_irqs)(struct pci_dev *dev);
 135#endif
 136
 137        void            (*restart)(char *cmd);
 138        void            (*power_off)(void);
 139        void            (*halt)(void);
 140        void            (*panic)(char *str);
 141        void            (*cpu_die)(void);
 142
 143        long            (*time_init)(void); /* Optional, may be NULL */
 144
 145        int             (*set_rtc_time)(struct rtc_time *);
 146        void            (*get_rtc_time)(struct rtc_time *);
 147        unsigned long   (*get_boot_time)(void);
 148        unsigned char   (*rtc_read_val)(int addr);
 149        void            (*rtc_write_val)(int addr, unsigned char val);
 150
 151        void            (*calibrate_decr)(void);
 152
 153        void            (*progress)(char *, unsigned short);
 154
 155        /* Interface for platform error logging */
 156        void            (*log_error)(char *buf, unsigned int err_type, int fatal);
 157
 158        unsigned char   (*nvram_read_val)(int addr);
 159        void            (*nvram_write_val)(int addr, unsigned char val);
 160        ssize_t         (*nvram_write)(char *buf, size_t count, loff_t *index);
 161        ssize_t         (*nvram_read)(char *buf, size_t count, loff_t *index);  
 162        ssize_t         (*nvram_size)(void);            
 163        void            (*nvram_sync)(void);
 164
 165        /* Exception handlers */
 166        int             (*system_reset_exception)(struct pt_regs *regs);
 167        int             (*machine_check_exception)(struct pt_regs *regs);
 168
 169        /* Motherboard/chipset features. This is a kind of general purpose
 170         * hook used to control some machine specific features (like reset
 171         * lines, chip power control, etc...).
 172         */
 173        long            (*feature_call)(unsigned int feature, ...);
 174
 175        /* Get legacy PCI/IDE interrupt mapping */ 
 176        int             (*pci_get_legacy_ide_irq)(struct pci_dev *dev, int channel);
 177        
 178        /* Get access protection for /dev/mem */
 179        pgprot_t        (*phys_mem_access_prot)(struct file *file,
 180                                                unsigned long pfn,
 181                                                unsigned long size,
 182                                                pgprot_t vma_prot);
 183
 184        /* Idle loop for this platform, leave empty for default idle loop */
 185        void            (*idle_loop)(void);
 186
 187        /*
 188         * Function for waiting for work with reduced power in idle loop;
 189         * called with interrupts disabled.
 190         */
 191        void            (*power_save)(void);
 192
 193        /* Function to enable performance monitor counters for this
 194           platform, called once per cpu. */
 195        void            (*enable_pmcs)(void);
 196
 197        /* Set DABR for this platform, leave empty for default implemenation */
 198        int             (*set_dabr)(unsigned long dabr);
 199
 200#ifdef CONFIG_PPC32     /* XXX for now */
 201        /* A general init function, called by ppc_init in init/main.c.
 202           May be NULL. */
 203        void            (*init)(void);
 204
 205        void            (*kgdb_map_scc)(void);
 206
 207        /*
 208         * optional PCI "hooks"
 209         */
 210        /* Called at then very end of pcibios_init() */
 211        void (*pcibios_after_init)(void);
 212
 213#endif /* CONFIG_PPC32 */
 214
 215        /* Called in indirect_* to avoid touching devices */
 216        int (*pci_exclude_device)(struct pci_controller *, unsigned char, unsigned char);
 217
 218        /* Called after PPC generic resource fixup to perform
 219           machine specific fixups */
 220        void (*pcibios_fixup_resources)(struct pci_dev *);
 221
 222        /* Called for each PCI bus in the system when it's probed */
 223        void (*pcibios_fixup_bus)(struct pci_bus *);
 224
 225        /* Called when pci_enable_device() is called. Returns 0 to
 226         * allow assignment/enabling of the device. */
 227        int  (*pcibios_enable_device_hook)(struct pci_dev *);
 228
 229        /* Called to shutdown machine specific hardware not already controlled
 230         * by other drivers.
 231         */
 232        void (*machine_shutdown)(void);
 233
 234#ifdef CONFIG_KEXEC
 235        void (*kexec_cpu_down)(int crash_shutdown, int secondary);
 236
 237        /* Called to do what every setup is needed on image and the
 238         * reboot code buffer. Returns 0 on success.
 239         * Provide your own (maybe dummy) implementation if your platform
 240         * claims to support kexec.
 241         */
 242        int (*machine_kexec_prepare)(struct kimage *image);
 243
 244        /* Called to perform the _real_ kexec.
 245         * Do NOT allocate memory or fail here. We are past the point of
 246         * no return.
 247         */
 248        void (*machine_kexec)(struct kimage *image);
 249#endif /* CONFIG_KEXEC */
 250
 251#ifdef CONFIG_SUSPEND
 252        /* These are called to disable and enable, respectively, IRQs when
 253         * entering a suspend state.  If NULL, then the generic versions
 254         * will be called.  The generic versions disable/enable the
 255         * decrementer along with interrupts.
 256         */
 257        void (*suspend_disable_irqs)(void);
 258        void (*suspend_enable_irqs)(void);
 259#endif
 260        int (*suspend_disable_cpu)(void);
 261
 262#ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
 263        ssize_t (*cpu_probe)(const char *, size_t);
 264        ssize_t (*cpu_release)(const char *, size_t);
 265#endif
 266};
 267
 268extern void e500_idle(void);
 269extern void power4_idle(void);
 270extern void ppc6xx_idle(void);
 271extern void book3e_idle(void);
 272
 273/*
 274 * ppc_md contains a copy of the machine description structure for the
 275 * current platform. machine_id contains the initial address where the
 276 * description was found during boot.
 277 */
 278extern struct machdep_calls ppc_md;
 279extern struct machdep_calls *machine_id;
 280
 281#define __machine_desc __attribute__ ((__section__ (".machine.desc")))
 282
 283#define define_machine(name)                                    \
 284        extern struct machdep_calls mach_##name;                \
 285        EXPORT_SYMBOL(mach_##name);                             \
 286        struct machdep_calls mach_##name __machine_desc =
 287
 288#define machine_is(name) \
 289        ({ \
 290                extern struct machdep_calls mach_##name \
 291                        __attribute__((weak));           \
 292                machine_id == &mach_##name; \
 293        })
 294
 295extern void probe_machine(void);
 296
 297extern char cmd_line[COMMAND_LINE_SIZE];
 298
 299#ifdef CONFIG_PPC_PMAC
 300/*
 301 * Power macintoshes have either a CUDA, PMU or SMU controlling
 302 * system reset, power, NVRAM, RTC.
 303 */
 304typedef enum sys_ctrler_kind {
 305        SYS_CTRLER_UNKNOWN = 0,
 306        SYS_CTRLER_CUDA = 1,
 307        SYS_CTRLER_PMU = 2,
 308        SYS_CTRLER_SMU = 3,
 309} sys_ctrler_t;
 310extern sys_ctrler_t sys_ctrler;
 311
 312#endif /* CONFIG_PPC_PMAC */
 313
 314#ifdef CONFIG_SMP
 315/* Poor default implementations */
 316extern void __devinit smp_generic_give_timebase(void);
 317extern void __devinit smp_generic_take_timebase(void);
 318#endif /* CONFIG_SMP */
 319
 320
 321/* Functions to produce codes on the leds.
 322 * The SRC code should be unique for the message category and should
 323 * be limited to the lower 24 bits (the upper 8 are set by these funcs),
 324 * and (for boot & dump) should be sorted numerically in the order
 325 * the events occur.
 326 */
 327/* Print a boot progress message. */
 328void ppc64_boot_msg(unsigned int src, const char *msg);
 329
 330static inline void log_error(char *buf, unsigned int err_type, int fatal)
 331{
 332        if (ppc_md.log_error)
 333                ppc_md.log_error(buf, err_type, fatal);
 334}
 335
 336#define __define_machine_initcall(mach,level,fn,id) \
 337        static int __init __machine_initcall_##mach##_##fn(void) { \
 338                if (machine_is(mach)) return fn(); \
 339                return 0; \
 340        } \
 341        __define_initcall(level,__machine_initcall_##mach##_##fn,id);
 342
 343#define machine_core_initcall(mach,fn)          __define_machine_initcall(mach,"1",fn,1)
 344#define machine_core_initcall_sync(mach,fn)     __define_machine_initcall(mach,"1s",fn,1s)
 345#define machine_postcore_initcall(mach,fn)      __define_machine_initcall(mach,"2",fn,2)
 346#define machine_postcore_initcall_sync(mach,fn) __define_machine_initcall(mach,"2s",fn,2s)
 347#define machine_arch_initcall(mach,fn)          __define_machine_initcall(mach,"3",fn,3)
 348#define machine_arch_initcall_sync(mach,fn)     __define_machine_initcall(mach,"3s",fn,3s)
 349#define machine_subsys_initcall(mach,fn)        __define_machine_initcall(mach,"4",fn,4)
 350#define machine_subsys_initcall_sync(mach,fn)   __define_machine_initcall(mach,"4s",fn,4s)
 351#define machine_fs_initcall(mach,fn)            __define_machine_initcall(mach,"5",fn,5)
 352#define machine_fs_initcall_sync(mach,fn)       __define_machine_initcall(mach,"5s",fn,5s)
 353#define machine_rootfs_initcall(mach,fn)        __define_machine_initcall(mach,"rootfs",fn,rootfs)
 354#define machine_device_initcall(mach,fn)        __define_machine_initcall(mach,"6",fn,6)
 355#define machine_device_initcall_sync(mach,fn)   __define_machine_initcall(mach,"6s",fn,6s)
 356#define machine_late_initcall(mach,fn)          __define_machine_initcall(mach,"7",fn,7)
 357#define machine_late_initcall_sync(mach,fn)     __define_machine_initcall(mach,"7s",fn,7s)
 358
 359#endif /* __KERNEL__ */
 360#endif /* _ASM_POWERPC_MACHDEP_H */
 361