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         void            (*pci_dma_dev_setup)(struct pci_dev *dev);
  92         void            (*pci_dma_bus_setup)(struct pci_bus *bus);
  93
  94         void __iomem *  (*ioremap)(phys_addr_t addr, unsigned long size,
  95                                    unsigned long flags);
  96         void            (*iounmap)(volatile void __iomem *token);
  97
  98 #ifdef CONFIG_PM
  99         void            (*iommu_save)(void);
 100         void            (*iommu_restore)(void);
 101 #endif
 102 #endif /* CONFIG_PPC64 */
 103
 104         int             (*probe)(void);
 105         void            (*setup_arch)(void); /* Optional, may be NULL */
 106         void            (*init_early)(void);
 107         /* Optional, may be NULL. */
 108         void            (*show_cpuinfo)(struct seq_file *m);
 109         void            (*show_percpuinfo)(struct seq_file *m, int i);
 110
 111         void            (*init_IRQ)(void);
 112         unsigned int    (*get_irq)(void);
 113 #ifdef CONFIG_KEXEC
 114         void            (*kexec_cpu_down)(int crash_shutdown, int secondary);
 115 #endif
 116
 117         /* PCI stuff */
 118         /* Called after scanning the bus, before allocating resources */
 119         void            (*pcibios_fixup)(void);
 120         int             (*pci_probe_mode)(struct pci_bus *);
 121         void            (*pci_irq_fixup)(struct pci_dev *dev);
 122
 123         /* To setup PHBs when using automatic OF platform driver for PCI */
 124         int             (*pci_setup_phb)(struct pci_controller *host);
 125
 126 #ifdef CONFIG_PCI_MSI
 127         int             (*msi_check_device)(struct pci_dev* dev,
 128                                             int nvec, int type);
 129         int             (*setup_msi_irqs)(struct pci_dev *dev,
 130                                           int nvec, int type);
 131         void            (*teardown_msi_irqs)(struct pci_dev *dev);
 132 #endif
 133
 134         void            (*restart)(char *cmd);
 135         void            (*power_off)(void);
 136         void            (*halt)(void);
 137         void            (*panic)(char *str);
 138         void            (*cpu_die)(void);
 139
 140         long            (*time_init)(void); /* Optional, may be NULL */
 141
 142         int             (*set_rtc_time)(struct rtc_time *);
 143         void            (*get_rtc_time)(struct rtc_time *);
 144         unsigned long   (*get_boot_time)(void);
 145         unsigned char   (*rtc_read_val)(int addr);
 146         void            (*rtc_write_val)(int addr, unsigned char val);
 147
 148         void            (*calibrate_decr)(void);
 149
 150         void            (*progress)(char *, unsigned short);
 151
 152         /* Interface for platform error logging */
 153         void            (*log_error)(char *buf, unsigned int err_type, int fatal);
 154
 155         unsigned char   (*nvram_read_val)(int addr);
 156         void            (*nvram_write_val)(int addr, unsigned char val);
 157         ssize_t         (*nvram_write)(char *buf, size_t count, loff_t *index);
 158         ssize_t         (*nvram_read)(char *buf, size_t count, loff_t *index);
 159         ssize_t         (*nvram_size)(void);
 160         void            (*nvram_sync)(void);
 161
 162         /* Exception handlers */
 163         int             (*system_reset_exception)(struct pt_regs *regs);
 164         int             (*machine_check_exception)(struct pt_regs *regs);
 165
 166         /* Motherboard/chipset features. This is a kind of general purpose
 167          * hook used to control some machine specific features (like reset
 168          * lines, chip power control, etc...).
 169          */
 170         long            (*feature_call)(unsigned int feature, ...);
 171
 172         /* Get legacy PCI/IDE interrupt mapping */
 173         int             (*pci_get_legacy_ide_irq)(struct pci_dev *dev, int channel);
 174
 175         /* Get access protection for /dev/mem */
 176         pgprot_t        (*phys_mem_access_prot)(struct file *file,
 177                                                 unsigned long pfn,
 178                                                 unsigned long size,
 179                                                 pgprot_t vma_prot);
 180
 181         /* Idle loop for this platform, leave empty for default idle loop */
 182         void            (*idle_loop)(void);
 183
 184         /*
 185          * Function for waiting for work with reduced power in idle loop;
 186          * called with interrupts disabled.
 187          */
 188         void            (*power_save)(void);
 189
 190         /* Function to enable performance monitor counters for this
 191            platform, called once per cpu. */
 192         void            (*enable_pmcs)(void);
 193
 194         /* Set DABR for this platform, leave empty for default implemenation */
 195         int             (*set_dabr)(unsigned long dabr);
 196
 197 #ifdef CONFIG_PPC32     /* XXX for now */
 198         /* A general init function, called by ppc_init in init/main.c.
 199            May be NULL. */
 200         void            (*init)(void);
 201
 202         void            (*kgdb_map_scc)(void);
 203
 204         /*
 205          * optional PCI "hooks"
 206          */
 207         /* Called in indirect_* to avoid touching devices */
 208         int (*pci_exclude_device)(struct pci_controller *, unsigned char, unsigned char);
 209
 210         /* Called at then very end of pcibios_init() */
 211         void (*pcibios_after_init)(void);
 212
 213 #endif /* CONFIG_PPC32 */
 214
 215         /* Called after PPC generic resource fixup to perform
 216            machine specific fixups */
 217         void (*pcibios_fixup_resources)(struct pci_dev *);
 218
 219         /* Called for each PCI bus in the system when it's probed */
 220         void (*pcibios_fixup_bus)(struct pci_bus *);
 221
 222         /* Called when pci_enable_device() is called. Returns 0 to
 223          * allow assignment/enabling of the device. */
 224         int  (*pcibios_enable_device_hook)(struct pci_dev *);
 225
 226         /* Called to shutdown machine specific hardware not already controlled
 227          * by other drivers.
 228          */
 229         void (*machine_shutdown)(void);
 230
 231 #ifdef CONFIG_KEXEC
 232         /* Called to do the minimal shutdown needed to run a kexec'd kernel
 233          * to run successfully.
 234          * XXX Should we move this one out of kexec scope?
 235          */
 236         void (*machine_crash_shutdown)(struct pt_regs *regs);
 237
 238         /* Called to do what every setup is needed on image and the
 239          * reboot code buffer. Returns 0 on success.
 240          * Provide your own (maybe dummy) implementation if your platform
 241          * claims to support kexec.
 242          */
 243         int (*machine_kexec_prepare)(struct kimage *image);
 244
 245         /* Called to handle any machine specific cleanup on image */
 246         void (*machine_kexec_cleanup)(struct kimage *image);
 247
 248         /* Called to perform the _real_ kexec.
 249          * Do NOT allocate memory or fail here. We are past the point of
 250          * no return.
 251          */
 252         void (*machine_kexec)(struct kimage *image);
 253 #endif /* CONFIG_KEXEC */
 254
 255 #ifdef CONFIG_SUSPEND
 256         /* These are called to disable and enable, respectively, IRQs when
 257          * entering a suspend state.  If NULL, then the generic versions
 258          * will be called.  The generic versions disable/enable the
 259          * decrementer along with interrupts.
 260          */
 261         void (*suspend_disable_irqs)(void);
 262         void (*suspend_enable_irqs)(void);
 263 #endif
 264 };
 265
 266 extern void e500_idle(void);
 267 extern void power4_idle(void);
 268 extern void power4_cpu_offline_powersave(void);
 269 extern void ppc6xx_idle(void);
 270
 271 /*
 272  * ppc_md contains a copy of the machine description structure for the
 273  * current platform. machine_id contains the initial address where the
 274  * description was found during boot.
 275  */
 276 extern struct machdep_calls ppc_md;
 277 extern struct machdep_calls *machine_id;
 278
 279 #define __machine_desc __attribute__ ((__section__ (".machine.desc")))
 280
 281 #define define_machine(name)                                    \
 282         extern struct machdep_calls mach_##name;                \
 283         EXPORT_SYMBOL(mach_##name);                             \
 284         struct machdep_calls mach_##name __machine_desc =
 285
 286 #define machine_is(name) \
 287         ({ \
 288                 extern struct machdep_calls mach_##name \
 289                         __attribute__((weak));           \
 290                 machine_id == &mach_##name; \
 291         })
 292
 293 extern void probe_machine(void);
 294
 295 extern char cmd_line[COMMAND_LINE_SIZE];
 296
 297 #ifdef CONFIG_PPC_PMAC
 298 /*
 299  * Power macintoshes have either a CUDA, PMU or SMU controlling
 300  * system reset, power, NVRAM, RTC.
 301  */
 302 typedef enum sys_ctrler_kind {
 303         SYS_CTRLER_UNKNOWN = 0,
 304         SYS_CTRLER_CUDA = 1,
 305         SYS_CTRLER_PMU = 2,
 306         SYS_CTRLER_SMU = 3,
 307 } sys_ctrler_t;
 308 extern sys_ctrler_t sys_ctrler;
 309
 310 #endif /* CONFIG_PPC_PMAC */
 311
 312 extern void setup_pci_ptrs(void);
 313
 314 #ifdef CONFIG_SMP
 315 /* Poor default implementations */
 316 extern void __devinit smp_generic_give_timebase(void);
 317 extern 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. */
 328 void ppc64_boot_msg(unsigned int src, const char *msg);
 329 /* Print a termination message (print only -- does not stop the kernel) */
 330 void ppc64_terminate_msg(unsigned int src, const char *msg);
 331
 332 static inline void log_error(char *buf, unsigned int err_type, int fatal)
 333 {
 334         if (ppc_md.log_error)
 335                 ppc_md.log_error(buf, err_type, fatal);
 336 }
 337
 338 #define __define_machine_initcall(mach,level,fn,id) \
 339         static int __init __machine_initcall_##mach##_##fn(void) { \
 340                 if (machine_is(mach)) return fn(); \
 341                 return 0; \
 342         } \
 343         __define_initcall(level,__machine_initcall_##mach##_##fn,id);
 344
 345 #define machine_core_initcall(mach,fn)          __define_machine_initcall(mach,"1",fn,1)
 346 #define machine_core_initcall_sync(mach,fn)     __define_machine_initcall(mach,"1s",fn,1s)
 347 #define machine_postcore_initcall(mach,fn)      __define_machine_initcall(mach,"2",fn,2)
 348 #define machine_postcore_initcall_sync(mach,fn) __define_machine_initcall(mach,"2s",fn,2s)
 349 #define machine_arch_initcall(mach,fn)          __define_machine_initcall(mach,"3",fn,3)
 350 #define machine_arch_initcall_sync(mach,fn)     __define_machine_initcall(mach,"3s",fn,3s)
 351 #define machine_subsys_initcall(mach,fn)        __define_machine_initcall(mach,"4",fn,4)
 352 #define machine_subsys_initcall_sync(mach,fn)   __define_machine_initcall(mach,"4s",fn,4s)
 353 #define machine_fs_initcall(mach,fn)            __define_machine_initcall(mach,"5",fn,5)
 354 #define machine_fs_initcall_sync(mach,fn)       __define_machine_initcall(mach,"5s",fn,5s)
 355 #define machine_rootfs_initcall(mach,fn)        __define_machine_initcall(mach,"rootfs",fn,rootfs)
 356 #define machine_device_initcall(mach,fn)        __define_machine_initcall(mach,"6",fn,6)
 357 #define machine_device_initcall_sync(mach,fn)   __define_machine_initcall(mach,"6s",fn,6s)
 358 #define machine_late_initcall(mach,fn)          __define_machine_initcall(mach,"7",fn,7)
 359 #define machine_late_initcall_sync(mach,fn)     __define_machine_initcall(mach,"7s",fn,7s)
 360
 361 void generic_suspend_disable_irqs(void);
 362 void generic_suspend_enable_irqs(void);
 363
 364 #endif /* __KERNEL__ */
 365 #endif /* _ASM_POWERPC_MACHDEP_H */