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         unsigned int    (*get_irq)(void);
 114 #ifdef CONFIG_KEXEC
 115         void            (*kexec_cpu_down)(int crash_shutdown, int secondary);
 116 #endif
 117
 118         /* PCI stuff */
 119         /* Called after scanning the bus, before allocating resources */
 120         void            (*pcibios_fixup)(void);
 121         int             (*pci_probe_mode)(struct pci_bus *);
 122         void            (*pci_irq_fixup)(struct pci_dev *dev);
 123
 124         /* To setup PHBs when using automatic OF platform driver for PCI */
 125         int             (*pci_setup_phb)(struct pci_controller *host);
 126
 127 #ifdef CONFIG_PCI_MSI
 128         int             (*msi_check_device)(struct pci_dev* dev,
 129                                             int nvec, int type);
 130         int             (*setup_msi_irqs)(struct pci_dev *dev,
 131                                           int nvec, int type);
 132         void            (*teardown_msi_irqs)(struct pci_dev *dev);
 133 #endif
 134
 135         void            (*restart)(char *cmd);
 136         void            (*power_off)(void);
 137         void            (*halt)(void);
 138         void            (*panic)(char *str);
 139         void            (*cpu_die)(void);
 140
 141         long            (*time_init)(void); /* Optional, may be NULL */
 142
 143         int             (*set_rtc_time)(struct rtc_time *);
 144         void            (*get_rtc_time)(struct rtc_time *);
 145         unsigned long   (*get_boot_time)(void);
 146         unsigned char   (*rtc_read_val)(int addr);
 147         void            (*rtc_write_val)(int addr, unsigned char val);
 148
 149         void            (*calibrate_decr)(void);
 150
 151         void            (*progress)(char *, unsigned short);
 152
 153         /* Interface for platform error logging */
 154         void            (*log_error)(char *buf, unsigned int err_type, int fatal);
 155
 156         unsigned char   (*nvram_read_val)(int addr);
 157         void            (*nvram_write_val)(int addr, unsigned char val);
 158         ssize_t         (*nvram_write)(char *buf, size_t count, loff_t *index);
 159         ssize_t         (*nvram_read)(char *buf, size_t count, loff_t *index);
 160         ssize_t         (*nvram_size)(void);
 161         void            (*nvram_sync)(void);
 162
 163         /* Exception handlers */
 164         int             (*system_reset_exception)(struct pt_regs *regs);
 165         int             (*machine_check_exception)(struct pt_regs *regs);
 166
 167         /* Motherboard/chipset features. This is a kind of general purpose
 168          * hook used to control some machine specific features (like reset
 169          * lines, chip power control, etc...).
 170          */
 171         long            (*feature_call)(unsigned int feature, ...);
 172
 173         /* Get legacy PCI/IDE interrupt mapping */
 174         int             (*pci_get_legacy_ide_irq)(struct pci_dev *dev, int channel);
 175
 176         /* Get access protection for /dev/mem */
 177         pgprot_t        (*phys_mem_access_prot)(struct file *file,
 178                                                 unsigned long pfn,
 179                                                 unsigned long size,
 180                                                 pgprot_t vma_prot);
 181
 182         /* Idle loop for this platform, leave empty for default idle loop */
 183         void            (*idle_loop)(void);
 184
 185         /*
 186          * Function for waiting for work with reduced power in idle loop;
 187          * called with interrupts disabled.
 188          */
 189         void            (*power_save)(void);
 190
 191         /* Function to enable performance monitor counters for this
 192            platform, called once per cpu. */
 193         void            (*enable_pmcs)(void);
 194
 195         /* Set DABR for this platform, leave empty for default implemenation */
 196         int             (*set_dabr)(unsigned long dabr);
 197
 198 #ifdef CONFIG_PPC32     /* XXX for now */
 199         /* A general init function, called by ppc_init in init/main.c.
 200            May be NULL. */
 201         void            (*init)(void);
 202
 203         void            (*kgdb_map_scc)(void);
 204
 205         /*
 206          * optional PCI "hooks"
 207          */
 208         /* Called in indirect_* to avoid touching devices */
 209         int (*pci_exclude_device)(struct pci_controller *, unsigned char, unsigned char);
 210
 211         /* Called at then very end of pcibios_init() */
 212         void (*pcibios_after_init)(void);
 213
 214 #endif /* CONFIG_PPC32 */
 215
 216         /* Called after PPC generic resource fixup to perform
 217            machine specific fixups */
 218         void (*pcibios_fixup_resources)(struct pci_dev *);
 219
 220         /* Called for each PCI bus in the system when it's probed */
 221         void (*pcibios_fixup_bus)(struct pci_bus *);
 222
 223         /* Called when pci_enable_device() is called. Returns 0 to
 224          * allow assignment/enabling of the device. */
 225         int  (*pcibios_enable_device_hook)(struct pci_dev *);
 226
 227         /* Called to shutdown machine specific hardware not already controlled
 228          * by other drivers.
 229          */
 230         void (*machine_shutdown)(void);
 231
 232 #ifdef CONFIG_KEXEC
 233         /* Called to do the minimal shutdown needed to run a kexec'd kernel
 234          * to run successfully.
 235          * XXX Should we move this one out of kexec scope?
 236          */
 237         void (*machine_crash_shutdown)(struct pt_regs *regs);
 238
 239         /* Called to do what every setup is needed on image and the
 240          * reboot code buffer. Returns 0 on success.
 241          * Provide your own (maybe dummy) implementation if your platform
 242          * claims to support kexec.
 243          */
 244         int (*machine_kexec_prepare)(struct kimage *image);
 245
 246         /* Called to handle any machine specific cleanup on image */
 247         void (*machine_kexec_cleanup)(struct kimage *image);
 248
 249         /* Called to perform the _real_ kexec.
 250          * Do NOT allocate memory or fail here. We are past the point of
 251          * no return.
 252          */
 253         void (*machine_kexec)(struct kimage *image);
 254 #endif /* CONFIG_KEXEC */
 255
 256 #ifdef CONFIG_SUSPEND
 257         /* These are called to disable and enable, respectively, IRQs when
 258          * entering a suspend state.  If NULL, then the generic versions
 259          * will be called.  The generic versions disable/enable the
 260          * decrementer along with interrupts.
 261          */
 262         void (*suspend_disable_irqs)(void);
 263         void (*suspend_enable_irqs)(void);
 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
 272 /*
 273  * ppc_md contains a copy of the machine description structure for the
 274  * current platform. machine_id contains the initial address where the
 275  * description was found during boot.
 276  */
 277 extern struct machdep_calls ppc_md;
 278 extern struct machdep_calls *machine_id;
 279
 280 #define __machine_desc __attribute__ ((__section__ (".machine.desc")))
 281
 282 #define define_machine(name)                                    \
 283         extern struct machdep_calls mach_##name;                \
 284         EXPORT_SYMBOL(mach_##name);                             \
 285         struct machdep_calls mach_##name __machine_desc =
 286
 287 #define machine_is(name) \
 288         ({ \
 289                 extern struct machdep_calls mach_##name \
 290                         __attribute__((weak));           \
 291                 machine_id == &mach_##name; \
 292         })
 293
 294 extern void probe_machine(void);
 295
 296 extern char cmd_line[COMMAND_LINE_SIZE];
 297
 298 #ifdef CONFIG_PPC_PMAC
 299 /*
 300  * Power macintoshes have either a CUDA, PMU or SMU controlling
 301  * system reset, power, NVRAM, RTC.
 302  */
 303 typedef enum sys_ctrler_kind {
 304         SYS_CTRLER_UNKNOWN = 0,
 305         SYS_CTRLER_CUDA = 1,
 306         SYS_CTRLER_PMU = 2,
 307         SYS_CTRLER_SMU = 3,
 308 } sys_ctrler_t;
 309 extern sys_ctrler_t sys_ctrler;
 310
 311 #endif /* CONFIG_PPC_PMAC */
 312
 313 extern void setup_pci_ptrs(void);
 314
 315 #ifdef CONFIG_SMP
 316 /* Poor default implementations */
 317 extern void __devinit smp_generic_give_timebase(void);
 318 extern void __devinit smp_generic_take_timebase(void);
 319 #endif /* CONFIG_SMP */
 320
 321
 322 /* Functions to produce codes on the leds.
 323  * The SRC code should be unique for the message category and should
 324  * be limited to the lower 24 bits (the upper 8 are set by these funcs),
 325  * and (for boot & dump) should be sorted numerically in the order
 326  * the events occur.
 327  */
 328 /* Print a boot progress message. */
 329 void ppc64_boot_msg(unsigned int src, const char *msg);
 330
 331 static inline void log_error(char *buf, unsigned int err_type, int fatal)
 332 {
 333         if (ppc_md.log_error)
 334                 ppc_md.log_error(buf, err_type, fatal);
 335 }
 336
 337 #define __define_machine_initcall(mach,level,fn,id) \
 338         static int __init __machine_initcall_##mach##_##fn(void) { \
 339                 if (machine_is(mach)) return fn(); \
 340                 return 0; \
 341         } \
 342         __define_initcall(level,__machine_initcall_##mach##_##fn,id);
 343
 344 #define machine_core_initcall(mach,fn)          __define_machine_initcall(mach,"1",fn,1)
 345 #define machine_core_initcall_sync(mach,fn)     __define_machine_initcall(mach,"1s",fn,1s)
 346 #define machine_postcore_initcall(mach,fn)      __define_machine_initcall(mach,"2",fn,2)
 347 #define machine_postcore_initcall_sync(mach,fn) __define_machine_initcall(mach,"2s",fn,2s)
 348 #define machine_arch_initcall(mach,fn)          __define_machine_initcall(mach,"3",fn,3)
 349 #define machine_arch_initcall_sync(mach,fn)     __define_machine_initcall(mach,"3s",fn,3s)
 350 #define machine_subsys_initcall(mach,fn)        __define_machine_initcall(mach,"4",fn,4)
 351 #define machine_subsys_initcall_sync(mach,fn)   __define_machine_initcall(mach,"4s",fn,4s)
 352 #define machine_fs_initcall(mach,fn)            __define_machine_initcall(mach,"5",fn,5)
 353 #define machine_fs_initcall_sync(mach,fn)       __define_machine_initcall(mach,"5s",fn,5s)
 354 #define machine_rootfs_initcall(mach,fn)        __define_machine_initcall(mach,"rootfs",fn,rootfs)
 355 #define machine_device_initcall(mach,fn)        __define_machine_initcall(mach,"6",fn,6)
 356 #define machine_device_initcall_sync(mach,fn)   __define_machine_initcall(mach,"6s",fn,6s)
 357 #define machine_late_initcall(mach,fn)          __define_machine_initcall(mach,"7",fn,7)
 358 #define machine_late_initcall_sync(mach,fn)     __define_machine_initcall(mach,"7s",fn,7s)
 359
 360 void generic_suspend_disable_irqs(void);
 361 void generic_suspend_enable_irqs(void);
 362
 363 #endif /* __KERNEL__ */
 364 #endif /* _ASM_POWERPC_MACHDEP_H */