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 struct kimage;
  31
  32 #ifdef CONFIG_SMP
  33 struct 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  (*take_timebase)(void);
  39         void  (*give_timebase)(void);
  40         int   (*cpu_disable)(void);
  41         void  (*cpu_die)(unsigned int nr);
  42         int   (*cpu_bootable)(unsigned int nr);
  43 };
  44 #endif
  45
  46 struct machdep_calls {
  47         char            *name;
  48 #ifdef CONFIG_PPC64
  49         void            (*hpte_invalidate)(unsigned long slot,
  50                                            unsigned long va,
  51                                            int psize, int ssize,
  52                                            int local);
  53         long            (*hpte_updatepp)(unsigned long slot,
  54                                          unsigned long newpp,
  55                                          unsigned long va,
  56                                          int psize, int ssize,
  57                                          int local);
  58         void            (*hpte_updateboltedpp)(unsigned long newpp,
  59                                                unsigned long ea,
  60                                                int psize, int ssize);
  61         long            (*hpte_insert)(unsigned long hpte_group,
  62                                        unsigned long va,
  63                                        unsigned long prpn,
  64                                        unsigned long rflags,
  65                                        unsigned long vflags,
  66                                        int psize, int ssize);
  67         long            (*hpte_remove)(unsigned long hpte_group);
  68         void            (*hpte_removebolted)(unsigned long ea,
  69                                              int psize, int ssize);
  70         void            (*flush_hash_range)(unsigned long number, int local);
  71
  72         /* special for kexec, to be called in real mode, linear mapping is
  73          * destroyed as well */
  74         void            (*hpte_clear_all)(void);
  75
  76         int             (*tce_build)(struct iommu_table *tbl,
  77                                      long index,
  78                                      long npages,
  79                                      unsigned long uaddr,
  80                                      enum dma_data_direction direction,
  81                                      struct dma_attrs *attrs);
  82         void            (*tce_free)(struct iommu_table *tbl,
  83                                     long index,
  84                                     long npages);
  85         unsigned long   (*tce_get)(struct iommu_table *tbl,
  86                                     long index);
  87         void            (*tce_flush)(struct iommu_table *tbl);
  88
  89         void __iomem *  (*ioremap)(phys_addr_t addr, unsigned long size,
  90                                    unsigned long flags, void *caller);
  91         void            (*iounmap)(volatile void __iomem *token);
  92
  93 #ifdef CONFIG_PM
  94         void            (*iommu_save)(void);
  95         void            (*iommu_restore)(void);
  96 #endif
  97 #endif /* CONFIG_PPC64 */
  98
  99         void            (*pci_dma_dev_setup)(struct pci_dev *dev);
 100         void            (*pci_dma_bus_setup)(struct pci_bus *bus);
 101
 102         /* Platform set_dma_mask override */
 103         int             (*dma_set_mask)(struct device *dev, u64 dma_mask);
 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
 119         /* PCI stuff */
 120         /* Called after scanning the bus, before allocating resources */
 121         void            (*pcibios_fixup)(void);
 122         int             (*pci_probe_mode)(struct pci_bus *);
 123         void            (*pci_irq_fixup)(struct pci_dev *dev);
 124
 125         /* To setup PHBs when using automatic OF platform driver for PCI */
 126         int             (*pci_setup_phb)(struct pci_controller *host);
 127
 128 #ifdef CONFIG_PCI_MSI
 129         int             (*msi_check_device)(struct pci_dev* dev,
 130                                             int nvec, int type);
 131         int             (*setup_msi_irqs)(struct pci_dev *dev,
 132                                           int nvec, int type);
 133         void            (*teardown_msi_irqs)(struct pci_dev *dev);
 134 #endif
 135
 136         void            (*restart)(char *cmd);
 137         void            (*power_off)(void);
 138         void            (*halt)(void);
 139         void            (*panic)(char *str);
 140         void            (*cpu_die)(void);
 141
 142         long            (*time_init)(void); /* Optional, may be NULL */
 143
 144         int             (*set_rtc_time)(struct rtc_time *);
 145         void            (*get_rtc_time)(struct rtc_time *);
 146         unsigned long   (*get_boot_time)(void);
 147         unsigned char   (*rtc_read_val)(int addr);
 148         void            (*rtc_write_val)(int addr, unsigned char val);
 149
 150         void            (*calibrate_decr)(void);
 151
 152         void            (*progress)(char *, unsigned short);
 153
 154         /* Interface for platform error logging */
 155         void            (*log_error)(char *buf, unsigned int err_type, int fatal);
 156
 157         unsigned char   (*nvram_read_val)(int addr);
 158         void            (*nvram_write_val)(int addr, unsigned char val);
 159         ssize_t         (*nvram_write)(char *buf, size_t count, loff_t *index);
 160         ssize_t         (*nvram_read)(char *buf, size_t count, loff_t *index);
 161         ssize_t         (*nvram_size)(void);
 162         void            (*nvram_sync)(void);
 163
 164         /* Exception handlers */
 165         int             (*system_reset_exception)(struct pt_regs *regs);
 166         int             (*machine_check_exception)(struct pt_regs *regs);
 167
 168         /* Motherboard/chipset features. This is a kind of general purpose
 169          * hook used to control some machine specific features (like reset
 170          * lines, chip power control, etc...).
 171          */
 172         long            (*feature_call)(unsigned int feature, ...);
 173
 174         /* Get legacy PCI/IDE interrupt mapping */
 175         int             (*pci_get_legacy_ide_irq)(struct pci_dev *dev, int channel);
 176
 177         /* Get access protection for /dev/mem */
 178         pgprot_t        (*phys_mem_access_prot)(struct file *file,
 179                                                 unsigned long pfn,
 180                                                 unsigned long size,
 181                                                 pgprot_t vma_prot);
 182
 183         /* Idle loop for this platform, leave empty for default idle loop */
 184         void            (*idle_loop)(void);
 185
 186         /*
 187          * Function for waiting for work with reduced power in idle loop;
 188          * called with interrupts disabled.
 189          */
 190         void            (*power_save)(void);
 191
 192         /* Function to enable performance monitor counters for this
 193            platform, called once per cpu. */
 194         void            (*enable_pmcs)(void);
 195
 196         /* Set DABR for this platform, leave empty for default implemenation */
 197         int             (*set_dabr)(unsigned long dabr);
 198
 199 #ifdef CONFIG_PPC32     /* XXX for now */
 200         /* A general init function, called by ppc_init in init/main.c.
 201            May be NULL. */
 202         void            (*init)(void);
 203
 204         void            (*kgdb_map_scc)(void);
 205
 206         /*
 207          * optional PCI "hooks"
 208          */
 209         /* Called at then very end of pcibios_init() */
 210         void (*pcibios_after_init)(void);
 211
 212 #endif /* CONFIG_PPC32 */
 213
 214         /* Called in indirect_* to avoid touching devices */
 215         int (*pci_exclude_device)(struct pci_controller *, unsigned char, unsigned char);
 216
 217         /* Called after PPC generic resource fixup to perform
 218            machine specific fixups */
 219         void (*pcibios_fixup_resources)(struct pci_dev *);
 220
 221         /* Called for each PCI bus in the system when it's probed */
 222         void (*pcibios_fixup_bus)(struct pci_bus *);
 223
 224         /* Called when pci_enable_device() is called. Returns 0 to
 225          * allow assignment/enabling of the device. */
 226         int  (*pcibios_enable_device_hook)(struct pci_dev *);
 227
 228         /* Called to shutdown machine specific hardware not already controlled
 229          * by other drivers.
 230          */
 231         void (*machine_shutdown)(void);
 232
 233 #ifdef CONFIG_KEXEC
 234         void (*kexec_cpu_down)(int crash_shutdown, int secondary);
 235
 236         /* Called to do what every setup is needed on image and the
 237          * reboot code buffer. Returns 0 on success.
 238          * Provide your own (maybe dummy) implementation if your platform
 239          * claims to support kexec.
 240          */
 241         int (*machine_kexec_prepare)(struct kimage *image);
 242
 243         /* Called to perform the _real_ kexec.
 244          * Do NOT allocate memory or fail here. We are past the point of
 245          * no return.
 246          */
 247         void (*machine_kexec)(struct kimage *image);
 248 #endif /* CONFIG_KEXEC */
 249
 250 #ifdef CONFIG_SUSPEND
 251         /* These are called to disable and enable, respectively, IRQs when
 252          * entering a suspend state.  If NULL, then the generic versions
 253          * will be called.  The generic versions disable/enable the
 254          * decrementer along with interrupts.
 255          */
 256         void (*suspend_disable_irqs)(void);
 257         void (*suspend_enable_irqs)(void);
 258 #endif
 259         int (*suspend_disable_cpu)(void);
 260
 261 #ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
 262         ssize_t (*cpu_probe)(const char *, size_t);
 263         ssize_t (*cpu_release)(const char *, size_t);
 264 #endif
 265 };
 266
 267 extern void e500_idle(void);
 268 extern void power4_idle(void);
 269 extern void power4_cpu_offline_powersave(void);
 270 extern void ppc6xx_idle(void);
 271 extern 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  */
 278 extern struct machdep_calls ppc_md;
 279 extern 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
 295 extern void probe_machine(void);
 296
 297 extern 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  */
 304 typedef 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;
 310 extern sys_ctrler_t sys_ctrler;
 311
 312 #endif /* CONFIG_PPC_PMAC */
 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
 330 static 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 */