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
  23 struct pt_regs;
  24 struct pci_bus;
  25 struct device_node;
  26 struct iommu_table;
  27 struct rtc_time;
  28 struct file;
  29 struct pci_controller;
  30 #ifdef CONFIG_KEXEC
  31 struct kimage;
  32 #endif
  33
  34 #ifdef CONFIG_SMP
  35 struct smp_ops_t {
  36         void  (*message_pass)(int target, int msg);
  37         int   (*probe)(void);
  38         void  (*kick_cpu)(int nr);
  39         void  (*setup_cpu)(int nr);
  40         void  (*take_timebase)(void);
  41         void  (*give_timebase)(void);
  42         int   (*cpu_enable)(unsigned int nr);
  43         int   (*cpu_disable)(void);
  44         void  (*cpu_die)(unsigned int nr);
  45         int   (*cpu_bootable)(unsigned int nr);
  46 };
  47 #endif
  48
  49 struct machdep_calls {
  50         char            *name;
  51 #ifdef CONFIG_PPC64
  52         void            (*hpte_invalidate)(unsigned long slot,
  53                                            unsigned long va,
  54                                            int psize, int ssize,
  55                                            int local);
  56         long            (*hpte_updatepp)(unsigned long slot,
  57                                          unsigned long newpp,
  58                                          unsigned long va,
  59                                          int psize, int ssize,
  60                                          int local);
  61         void            (*hpte_updateboltedpp)(unsigned long newpp,
  62                                                unsigned long ea,
  63                                                int psize, int ssize);
  64         long            (*hpte_insert)(unsigned long hpte_group,
  65                                        unsigned long va,
  66                                        unsigned long prpn,
  67                                        unsigned long rflags,
  68                                        unsigned long vflags,
  69                                        int psize, int ssize);
  70         long            (*hpte_remove)(unsigned long hpte_group);
  71         void            (*hpte_removebolted)(unsigned long ea,
  72                                              int psize, int ssize);
  73         void            (*flush_hash_range)(unsigned long number, int local);
  74
  75         /* special for kexec, to be called in real mode, linar mapping is
  76          * destroyed as well */
  77         void            (*hpte_clear_all)(void);
  78
  79         int             (*tce_build)(struct iommu_table *tbl,
  80                                      long index,
  81                                      long npages,
  82                                      unsigned long uaddr,
  83                                      enum dma_data_direction direction,
  84                                      struct dma_attrs *attrs);
  85         void            (*tce_free)(struct iommu_table *tbl,
  86                                     long index,
  87                                     long npages);
  88         unsigned long   (*tce_get)(struct iommu_table *tbl,
  89                                     long index);
  90         void            (*tce_flush)(struct iommu_table *tbl);
  91
  92         void __iomem *  (*ioremap)(phys_addr_t addr, unsigned long size,
  93                                    unsigned long flags, void *caller);
  94         void            (*iounmap)(volatile void __iomem *token);
  95
  96 #ifdef CONFIG_PM
  97         void            (*iommu_save)(void);
  98         void            (*iommu_restore)(void);
  99 #endif
 100 #endif /* CONFIG_PPC64 */
 101
 102         void            (*pci_dma_dev_setup)(struct pci_dev *dev);
 103         void            (*pci_dma_bus_setup)(struct pci_bus *bus);
 104
 105         int             (*probe)(void);
 106         void            (*setup_arch)(void); /* Optional, may be NULL */
 107         void            (*init_early)(void);
 108         /* Optional, may be NULL. */
 109         void            (*show_cpuinfo)(struct seq_file *m);
 110         void            (*show_percpuinfo)(struct seq_file *m, int i);
 111
 112         void            (*init_IRQ)(void);
 113
 114         /* Return an irq, or NO_IRQ to indicate there are none pending.
 115          * If for some reason there is no irq, but the interrupt
 116          * shouldn't be counted as spurious, return NO_IRQ_IGNORE. */
 117         unsigned int    (*get_irq)(void);
 118 #ifdef CONFIG_KEXEC
 119         void            (*kexec_cpu_down)(int crash_shutdown, int secondary);
 120 #endif
 121
 122         /* PCI stuff */
 123         /* Called after scanning the bus, before allocating resources */
 124         void            (*pcibios_fixup)(void);
 125         int             (*pci_probe_mode)(struct pci_bus *);
 126         void            (*pci_irq_fixup)(struct pci_dev *dev);
 127
 128         /* To setup PHBs when using automatic OF platform driver for PCI */
 129         int             (*pci_setup_phb)(struct pci_controller *host);
 130
 131 #ifdef CONFIG_PCI_MSI
 132         int             (*msi_check_device)(struct pci_dev* dev,
 133                                             int nvec, int type);
 134         int             (*setup_msi_irqs)(struct pci_dev *dev,
 135                                           int nvec, int type);
 136         void            (*teardown_msi_irqs)(struct pci_dev *dev);
 137 #endif
 138
 139         void            (*restart)(char *cmd);
 140         void            (*power_off)(void);
 141         void            (*halt)(void);
 142         void            (*panic)(char *str);
 143         void            (*cpu_die)(void);
 144
 145         long            (*time_init)(void); /* Optional, may be NULL */
 146
 147         int             (*set_rtc_time)(struct rtc_time *);
 148         void            (*get_rtc_time)(struct rtc_time *);
 149         unsigned long   (*get_boot_time)(void);
 150         unsigned char   (*rtc_read_val)(int addr);
 151         void            (*rtc_write_val)(int addr, unsigned char val);
 152
 153         void            (*calibrate_decr)(void);
 154
 155         void            (*progress)(char *, unsigned short);
 156
 157         /* Interface for platform error logging */
 158         void            (*log_error)(char *buf, unsigned int err_type, int fatal);
 159
 160         unsigned char   (*nvram_read_val)(int addr);
 161         void            (*nvram_write_val)(int addr, unsigned char val);
 162         ssize_t         (*nvram_write)(char *buf, size_t count, loff_t *index);
 163         ssize_t         (*nvram_read)(char *buf, size_t count, loff_t *index);
 164         ssize_t         (*nvram_size)(void);
 165         void            (*nvram_sync)(void);
 166
 167         /* Exception handlers */
 168         int             (*system_reset_exception)(struct pt_regs *regs);
 169         int             (*machine_check_exception)(struct pt_regs *regs);
 170
 171         /* Motherboard/chipset features. This is a kind of general purpose
 172          * hook used to control some machine specific features (like reset
 173          * lines, chip power control, etc...).
 174          */
 175         long            (*feature_call)(unsigned int feature, ...);
 176
 177         /* Get legacy PCI/IDE interrupt mapping */
 178         int             (*pci_get_legacy_ide_irq)(struct pci_dev *dev, int channel);
 179
 180         /* Get access protection for /dev/mem */
 181         pgprot_t        (*phys_mem_access_prot)(struct file *file,
 182                                                 unsigned long pfn,
 183                                                 unsigned long size,
 184                                                 pgprot_t vma_prot);
 185
 186         /* Idle loop for this platform, leave empty for default idle loop */
 187         void            (*idle_loop)(void);
 188
 189         /*
 190          * Function for waiting for work with reduced power in idle loop;
 191          * called with interrupts disabled.
 192          */
 193         void            (*power_save)(void);
 194
 195         /* Function to enable performance monitor counters for this
 196            platform, called once per cpu. */
 197         void            (*enable_pmcs)(void);
 198
 199         /* Set DABR for this platform, leave empty for default implemenation */
 200         int             (*set_dabr)(unsigned long dabr);
 201
 202 #ifdef CONFIG_PPC32     /* XXX for now */
 203         /* A general init function, called by ppc_init in init/main.c.
 204            May be NULL. */
 205         void            (*init)(void);
 206
 207         void            (*kgdb_map_scc)(void);
 208
 209         /*
 210          * optional PCI "hooks"
 211          */
 212         /* Called at then very end of pcibios_init() */
 213         void (*pcibios_after_init)(void);
 214
 215 #endif /* CONFIG_PPC32 */
 216
 217         /* Called in indirect_* to avoid touching devices */
 218         int (*pci_exclude_device)(struct pci_controller *, unsigned char, unsigned char);
 219
 220         /* Called after PPC generic resource fixup to perform
 221            machine specific fixups */
 222         void (*pcibios_fixup_resources)(struct pci_dev *);
 223
 224         /* Called for each PCI bus in the system when it's probed */
 225         void (*pcibios_fixup_bus)(struct pci_bus *);
 226
 227         /* Called when pci_enable_device() is called. Returns 0 to
 228          * allow assignment/enabling of the device. */
 229         int  (*pcibios_enable_device_hook)(struct pci_dev *);
 230
 231         /* Called to shutdown machine specific hardware not already controlled
 232          * by other drivers.
 233          */
 234         void (*machine_shutdown)(void);
 235
 236 #ifdef CONFIG_KEXEC
 237         /* Called to do the minimal shutdown needed to run a kexec'd kernel
 238          * to run successfully.
 239          * XXX Should we move this one out of kexec scope?
 240          */
 241         void (*machine_crash_shutdown)(struct pt_regs *regs);
 242
 243         /* Called to do what every setup is needed on image and the
 244          * reboot code buffer. Returns 0 on success.
 245          * Provide your own (maybe dummy) implementation if your platform
 246          * claims to support kexec.
 247          */
 248         int (*machine_kexec_prepare)(struct kimage *image);
 249
 250         /* Called to handle any machine specific cleanup on image */
 251         void (*machine_kexec_cleanup)(struct kimage *image);
 252
 253         /* Called to perform the _real_ kexec.
 254          * Do NOT allocate memory or fail here. We are past the point of
 255          * no return.
 256          */
 257         void (*machine_kexec)(struct kimage *image);
 258 #endif /* CONFIG_KEXEC */
 259
 260 #ifdef CONFIG_SUSPEND
 261         /* These are called to disable and enable, respectively, IRQs when
 262          * entering a suspend state.  If NULL, then the generic versions
 263          * will be called.  The generic versions disable/enable the
 264          * decrementer along with interrupts.
 265          */
 266         void (*suspend_disable_irqs)(void);
 267         void (*suspend_enable_irqs)(void);
 268 #endif
 269
 270 #ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
 271         ssize_t (*cpu_probe)(const char *, size_t);
 272         ssize_t (*cpu_release)(const char *, size_t);
 273 #endif
 274 };
 275
 276 extern void e500_idle(void);
 277 extern void power4_idle(void);
 278 extern void power4_cpu_offline_powersave(void);
 279 extern void ppc6xx_idle(void);
 280
 281 /*
 282  * ppc_md contains a copy of the machine description structure for the
 283  * current platform. machine_id contains the initial address where the
 284  * description was found during boot.
 285  */
 286 extern struct machdep_calls ppc_md;
 287 extern struct machdep_calls *machine_id;
 288
 289 #define __machine_desc __attribute__ ((__section__ (".machine.desc")))
 290
 291 #define define_machine(name)                                    \
 292         extern struct machdep_calls mach_##name;                \
 293         EXPORT_SYMBOL(mach_##name);                             \
 294         struct machdep_calls mach_##name __machine_desc =
 295
 296 #define machine_is(name) \
 297         ({ \
 298                 extern struct machdep_calls mach_##name \
 299                         __attribute__((weak));           \
 300                 machine_id == &mach_##name; \
 301         })
 302
 303 extern void probe_machine(void);
 304
 305 extern char cmd_line[COMMAND_LINE_SIZE];
 306
 307 #ifdef CONFIG_PPC_PMAC
 308 /*
 309  * Power macintoshes have either a CUDA, PMU or SMU controlling
 310  * system reset, power, NVRAM, RTC.
 311  */
 312 typedef enum sys_ctrler_kind {
 313         SYS_CTRLER_UNKNOWN = 0,
 314         SYS_CTRLER_CUDA = 1,
 315         SYS_CTRLER_PMU = 2,
 316         SYS_CTRLER_SMU = 3,
 317 } sys_ctrler_t;
 318 extern sys_ctrler_t sys_ctrler;
 319
 320 #endif /* CONFIG_PPC_PMAC */
 321
 322 extern void setup_pci_ptrs(void);
 323
 324 #ifdef CONFIG_SMP
 325 /* Poor default implementations */
 326 extern void __devinit smp_generic_give_timebase(void);
 327 extern void __devinit smp_generic_take_timebase(void);
 328 #endif /* CONFIG_SMP */
 329
 330
 331 /* Functions to produce codes on the leds.
 332  * The SRC code should be unique for the message category and should
 333  * be limited to the lower 24 bits (the upper 8 are set by these funcs),
 334  * and (for boot & dump) should be sorted numerically in the order
 335  * the events occur.
 336  */
 337 /* Print a boot progress message. */
 338 void ppc64_boot_msg(unsigned int src, const char *msg);
 339
 340 static inline void log_error(char *buf, unsigned int err_type, int fatal)
 341 {
 342         if (ppc_md.log_error)
 343                 ppc_md.log_error(buf, err_type, fatal);
 344 }
 345
 346 #define __define_machine_initcall(mach,level,fn,id) \
 347         static int __init __machine_initcall_##mach##_##fn(void) { \
 348                 if (machine_is(mach)) return fn(); \
 349                 return 0; \
 350         } \
 351         __define_initcall(level,__machine_initcall_##mach##_##fn,id);
 352
 353 #define machine_core_initcall(mach,fn)          __define_machine_initcall(mach,"1",fn,1)
 354 #define machine_core_initcall_sync(mach,fn)     __define_machine_initcall(mach,"1s",fn,1s)
 355 #define machine_postcore_initcall(mach,fn)      __define_machine_initcall(mach,"2",fn,2)
 356 #define machine_postcore_initcall_sync(mach,fn) __define_machine_initcall(mach,"2s",fn,2s)
 357 #define machine_arch_initcall(mach,fn)          __define_machine_initcall(mach,"3",fn,3)
 358 #define machine_arch_initcall_sync(mach,fn)     __define_machine_initcall(mach,"3s",fn,3s)
 359 #define machine_subsys_initcall(mach,fn)        __define_machine_initcall(mach,"4",fn,4)
 360 #define machine_subsys_initcall_sync(mach,fn)   __define_machine_initcall(mach,"4s",fn,4s)
 361 #define machine_fs_initcall(mach,fn)            __define_machine_initcall(mach,"5",fn,5)
 362 #define machine_fs_initcall_sync(mach,fn)       __define_machine_initcall(mach,"5s",fn,5s)
 363 #define machine_rootfs_initcall(mach,fn)        __define_machine_initcall(mach,"rootfs",fn,rootfs)
 364 #define machine_device_initcall(mach,fn)        __define_machine_initcall(mach,"6",fn,6)
 365 #define machine_device_initcall_sync(mach,fn)   __define_machine_initcall(mach,"6s",fn,6s)
 366 #define machine_late_initcall(mach,fn)          __define_machine_initcall(mach,"7",fn,7)
 367 #define machine_late_initcall_sync(mach,fn)     __define_machine_initcall(mach,"7s",fn,7s)
 368
 369 #endif /* __KERNEL__ */
 370 #endif /* _ASM_POWERPC_MACHDEP_H */