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_enable)(unsigned int nr);
  41         int   (*cpu_disable)(void);
  42         void  (*cpu_die)(unsigned int nr);
  43         int   (*cpu_bootable)(unsigned int nr);
  44 };
  45 #endif
  46
  47 struct 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 #endif /* CONFIG_KEXEC */
 244
 245 #ifdef CONFIG_SUSPEND
 246         /* These are called to disable and enable, respectively, IRQs when
 247          * entering a suspend state.  If NULL, then the generic versions
 248          * will be called.  The generic versions disable/enable the
 249          * decrementer along with interrupts.
 250          */
 251         void (*suspend_disable_irqs)(void);
 252         void (*suspend_enable_irqs)(void);
 253 #endif
 254         int (*suspend_disable_cpu)(void);
 255
 256 #ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
 257         ssize_t (*cpu_probe)(const char *, size_t);
 258         ssize_t (*cpu_release)(const char *, size_t);
 259 #endif
 260 };
 261
 262 extern void e500_idle(void);
 263 extern void power4_idle(void);
 264 extern void power4_cpu_offline_powersave(void);
 265 extern void ppc6xx_idle(void);
 266 extern void book3e_idle(void);
 267
 268 /*
 269  * ppc_md contains a copy of the machine description structure for the
 270  * current platform. machine_id contains the initial address where the
 271  * description was found during boot.
 272  */
 273 extern struct machdep_calls ppc_md;
 274 extern struct machdep_calls *machine_id;
 275
 276 #define __machine_desc __attribute__ ((__section__ (".machine.desc")))
 277
 278 #define define_machine(name)                                    \
 279         extern struct machdep_calls mach_##name;                \
 280         EXPORT_SYMBOL(mach_##name);                             \
 281         struct machdep_calls mach_##name __machine_desc =
 282
 283 #define machine_is(name) \
 284         ({ \
 285                 extern struct machdep_calls mach_##name \
 286                         __attribute__((weak));           \
 287                 machine_id == &mach_##name; \
 288         })
 289
 290 extern void probe_machine(void);
 291
 292 extern char cmd_line[COMMAND_LINE_SIZE];
 293
 294 #ifdef CONFIG_PPC_PMAC
 295 /*
 296  * Power macintoshes have either a CUDA, PMU or SMU controlling
 297  * system reset, power, NVRAM, RTC.
 298  */
 299 typedef enum sys_ctrler_kind {
 300         SYS_CTRLER_UNKNOWN = 0,
 301         SYS_CTRLER_CUDA = 1,
 302         SYS_CTRLER_PMU = 2,
 303         SYS_CTRLER_SMU = 3,
 304 } sys_ctrler_t;
 305 extern sys_ctrler_t sys_ctrler;
 306
 307 #endif /* CONFIG_PPC_PMAC */
 308
 309 #ifdef CONFIG_SMP
 310 /* Poor default implementations */
 311 extern void __devinit smp_generic_give_timebase(void);
 312 extern void __devinit smp_generic_take_timebase(void);
 313 #endif /* CONFIG_SMP */
 314
 315
 316 /* Functions to produce codes on the leds.
 317  * The SRC code should be unique for the message category and should
 318  * be limited to the lower 24 bits (the upper 8 are set by these funcs),
 319  * and (for boot & dump) should be sorted numerically in the order
 320  * the events occur.
 321  */
 322 /* Print a boot progress message. */
 323 void ppc64_boot_msg(unsigned int src, const char *msg);
 324
 325 static inline void log_error(char *buf, unsigned int err_type, int fatal)
 326 {
 327         if (ppc_md.log_error)
 328                 ppc_md.log_error(buf, err_type, fatal);
 329 }
 330
 331 #define __define_machine_initcall(mach,level,fn,id) \
 332         static int __init __machine_initcall_##mach##_##fn(void) { \
 333                 if (machine_is(mach)) return fn(); \
 334                 return 0; \
 335         } \
 336         __define_initcall(level,__machine_initcall_##mach##_##fn,id);
 337
 338 #define machine_core_initcall(mach,fn)          __define_machine_initcall(mach,"1",fn,1)
 339 #define machine_core_initcall_sync(mach,fn)     __define_machine_initcall(mach,"1s",fn,1s)
 340 #define machine_postcore_initcall(mach,fn)      __define_machine_initcall(mach,"2",fn,2)
 341 #define machine_postcore_initcall_sync(mach,fn) __define_machine_initcall(mach,"2s",fn,2s)
 342 #define machine_arch_initcall(mach,fn)          __define_machine_initcall(mach,"3",fn,3)
 343 #define machine_arch_initcall_sync(mach,fn)     __define_machine_initcall(mach,"3s",fn,3s)
 344 #define machine_subsys_initcall(mach,fn)        __define_machine_initcall(mach,"4",fn,4)
 345 #define machine_subsys_initcall_sync(mach,fn)   __define_machine_initcall(mach,"4s",fn,4s)
 346 #define machine_fs_initcall(mach,fn)            __define_machine_initcall(mach,"5",fn,5)
 347 #define machine_fs_initcall_sync(mach,fn)       __define_machine_initcall(mach,"5s",fn,5s)
 348 #define machine_rootfs_initcall(mach,fn)        __define_machine_initcall(mach,"rootfs",fn,rootfs)
 349 #define machine_device_initcall(mach,fn)        __define_machine_initcall(mach,"6",fn,6)
 350 #define machine_device_initcall_sync(mach,fn)   __define_machine_initcall(mach,"6s",fn,6s)
 351 #define machine_late_initcall(mach,fn)          __define_machine_initcall(mach,"7",fn,7)
 352 #define machine_late_initcall_sync(mach,fn)     __define_machine_initcall(mach,"7s",fn,7s)
 353
 354 #endif /* __KERNEL__ */
 355 #endif /* _ASM_POWERPC_MACHDEP_H */