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 #include <linux/export.h>
  16
  17 #include <asm/setup.h>
  18
  19 /* We export this macro for external modules like Alsa to know if
  20  * ppc_md.feature_call is implemented or not
  21  */
  22 #define CONFIG_PPC_HAS_FEATURE_CALLS
  23
  24 struct pt_regs;
  25 struct pci_bus;
  26 struct device_node;
  27 struct iommu_table;
  28 struct rtc_time;
  29 struct file;
  30 struct pci_controller;
  31 struct kimage;
  32 struct pci_host_bridge;
  33
  34 struct machdep_calls {
  35         char            *name;
  36 #ifdef CONFIG_PPC64
  37         void            (*hpte_invalidate)(unsigned long slot,
  38                                            unsigned long vpn,
  39                                            int bpsize, int apsize,
  40                                            int ssize, int local);
  41         long            (*hpte_updatepp)(unsigned long slot,
  42                                          unsigned long newpp,
  43                                          unsigned long vpn,
  44                                          int bpsize, int apsize,
  45                                          int ssize, int local);
  46         void            (*hpte_updateboltedpp)(unsigned long newpp,
  47                                                unsigned long ea,
  48                                                int psize, int ssize);
  49         long            (*hpte_insert)(unsigned long hpte_group,
  50                                        unsigned long vpn,
  51                                        unsigned long prpn,
  52                                        unsigned long rflags,
  53                                        unsigned long vflags,
  54                                        int psize, int apsize,
  55                                        int ssize);
  56         long            (*hpte_remove)(unsigned long hpte_group);
  57         void            (*hpte_removebolted)(unsigned long ea,
  58                                              int psize, int ssize);
  59         void            (*flush_hash_range)(unsigned long number, int local);
  60         void            (*hugepage_invalidate)(unsigned long vsid,
  61                                                unsigned long addr,
  62                                                unsigned char *hpte_slot_array,
  63                                                int psize, int ssize);
  64         /* special for kexec, to be called in real mode, linear mapping is
  65          * destroyed as well */
  66         void            (*hpte_clear_all)(void);
  67
  68         int             (*tce_build)(struct iommu_table *tbl,
  69                                      long index,
  70                                      long npages,
  71                                      unsigned long uaddr,
  72                                      enum dma_data_direction direction,
  73                                      struct dma_attrs *attrs);
  74         void            (*tce_free)(struct iommu_table *tbl,
  75                                     long index,
  76                                     long npages);
  77         unsigned long   (*tce_get)(struct iommu_table *tbl,
  78                                     long index);
  79         void            (*tce_flush)(struct iommu_table *tbl);
  80
  81         /* _rm versions are for real mode use only */
  82         int             (*tce_build_rm)(struct iommu_table *tbl,
  83                                      long index,
  84                                      long npages,
  85                                      unsigned long uaddr,
  86                                      enum dma_data_direction direction,
  87                                      struct dma_attrs *attrs);
  88         void            (*tce_free_rm)(struct iommu_table *tbl,
  89                                     long index,
  90                                     long npages);
  91         void            (*tce_flush_rm)(struct iommu_table *tbl);
  92
  93         void __iomem *  (*ioremap)(phys_addr_t addr, unsigned long size,
  94                                    unsigned long flags, void *caller);
  95         void            (*iounmap)(volatile void __iomem *token);
  96
  97 #ifdef CONFIG_PM
  98         void            (*iommu_save)(void);
  99         void            (*iommu_restore)(void);
 100 #endif
 101 #ifdef CONFIG_MEMORY_HOTPLUG_SPARSE
 102         unsigned long   (*memory_block_size)(void);
 103 #endif
 104 #endif /* CONFIG_PPC64 */
 105
 106         void            (*pci_dma_dev_setup)(struct pci_dev *dev);
 107         void            (*pci_dma_bus_setup)(struct pci_bus *bus);
 108
 109         /* Platform set_dma_mask and dma_get_required_mask overrides */
 110         int             (*dma_set_mask)(struct device *dev, u64 dma_mask);
 111         u64             (*dma_get_required_mask)(struct device *dev);
 112
 113         int             (*probe)(void);
 114         void            (*setup_arch)(void); /* Optional, may be NULL */
 115         void            (*init_early)(void);
 116         /* Optional, may be NULL. */
 117         void            (*show_cpuinfo)(struct seq_file *m);
 118         void            (*show_percpuinfo)(struct seq_file *m, int i);
 119         /* Returns the current operating frequency of "cpu" in Hz */
 120         unsigned long   (*get_proc_freq)(unsigned int cpu);
 121
 122         void            (*init_IRQ)(void);
 123
 124         /* Return an irq, or NO_IRQ to indicate there are none pending. */
 125         unsigned int    (*get_irq)(void);
 126
 127         /* PCI stuff */
 128         /* Called after scanning the bus, before allocating resources */
 129         void            (*pcibios_fixup)(void);
 130         int             (*pci_probe_mode)(struct pci_bus *);
 131         void            (*pci_irq_fixup)(struct pci_dev *dev);
 132         int             (*pcibios_root_bridge_prepare)(struct pci_host_bridge
 133                                 *bridge);
 134
 135         /* To setup PHBs when using automatic OF platform driver for PCI */
 136         int             (*pci_setup_phb)(struct pci_controller *host);
 137
 138 #ifdef CONFIG_PCI_MSI
 139         int             (*setup_msi_irqs)(struct pci_dev *dev,
 140                                           int nvec, int type);
 141         void            (*teardown_msi_irqs)(struct pci_dev *dev);
 142 #endif
 143
 144         void            (*restart)(char *cmd);
 145         void            (*power_off)(void);
 146         void            (*halt)(void);
 147         void            (*panic)(char *str);
 148         void            (*cpu_die)(void);
 149
 150         long            (*time_init)(void); /* Optional, may be NULL */
 151
 152         int             (*set_rtc_time)(struct rtc_time *);
 153         void            (*get_rtc_time)(struct rtc_time *);
 154         unsigned long   (*get_boot_time)(void);
 155         unsigned char   (*rtc_read_val)(int addr);
 156         void            (*rtc_write_val)(int addr, unsigned char val);
 157
 158         void            (*calibrate_decr)(void);
 159
 160         void            (*progress)(char *, unsigned short);
 161
 162         /* Interface for platform error logging */
 163         void            (*log_error)(char *buf, unsigned int err_type, int fatal);
 164
 165         unsigned char   (*nvram_read_val)(int addr);
 166         void            (*nvram_write_val)(int addr, unsigned char val);
 167         ssize_t         (*nvram_write)(char *buf, size_t count, loff_t *index);
 168         ssize_t         (*nvram_read)(char *buf, size_t count, loff_t *index);
 169         ssize_t         (*nvram_size)(void);
 170         void            (*nvram_sync)(void);
 171
 172         /* Exception handlers */
 173         int             (*system_reset_exception)(struct pt_regs *regs);
 174         int             (*machine_check_exception)(struct pt_regs *regs);
 175         int             (*handle_hmi_exception)(struct pt_regs *regs);
 176
 177         /* Early exception handlers called in realmode */
 178         int             (*hmi_exception_early)(struct pt_regs *regs);
 179
 180         /* Called during machine check exception to retrive fixup address. */
 181         bool            (*mce_check_early_recovery)(struct pt_regs *regs);
 182
 183         /* Motherboard/chipset features. This is a kind of general purpose
 184          * hook used to control some machine specific features (like reset
 185          * lines, chip power control, etc...).
 186          */
 187         long            (*feature_call)(unsigned int feature, ...);
 188
 189         /* Get legacy PCI/IDE interrupt mapping */
 190         int             (*pci_get_legacy_ide_irq)(struct pci_dev *dev, int channel);
 191
 192         /* Get access protection for /dev/mem */
 193         pgprot_t        (*phys_mem_access_prot)(struct file *file,
 194                                                 unsigned long pfn,
 195                                                 unsigned long size,
 196                                                 pgprot_t vma_prot);
 197
 198         /*
 199          * Function for waiting for work with reduced power in idle loop;
 200          * called with interrupts disabled.
 201          */
 202         void            (*power_save)(void);
 203
 204         /* Function to enable performance monitor counters for this
 205            platform, called once per cpu. */
 206         void            (*enable_pmcs)(void);
 207
 208         /* Set DABR for this platform, leave empty for default implemenation */
 209         int             (*set_dabr)(unsigned long dabr,
 210                                     unsigned long dabrx);
 211
 212         /* Set DAWR for this platform, leave empty for default implemenation */
 213         int             (*set_dawr)(unsigned long dawr,
 214                                     unsigned long dawrx);
 215
 216 #ifdef CONFIG_PPC32     /* XXX for now */
 217         /* A general init function, called by ppc_init in init/main.c.
 218            May be NULL. */
 219         void            (*init)(void);
 220
 221         void            (*kgdb_map_scc)(void);
 222
 223         /*
 224          * optional PCI "hooks"
 225          */
 226         /* Called at then very end of pcibios_init() */
 227         void (*pcibios_after_init)(void);
 228
 229 #endif /* CONFIG_PPC32 */
 230
 231         /* Called in indirect_* to avoid touching devices */
 232         int (*pci_exclude_device)(struct pci_controller *, unsigned char, unsigned char);
 233
 234         /* Called after PPC generic resource fixup to perform
 235            machine specific fixups */
 236         void (*pcibios_fixup_resources)(struct pci_dev *);
 237
 238         /* Called for each PCI bus in the system when it's probed */
 239         void (*pcibios_fixup_bus)(struct pci_bus *);
 240
 241         /* Called when pci_enable_device() is called. Returns 0 to
 242          * allow assignment/enabling of the device. */
 243         int  (*pcibios_enable_device_hook)(struct pci_dev *);
 244
 245         /* Called after scan and before resource survey */
 246         void (*pcibios_fixup_phb)(struct pci_controller *hose);
 247
 248         /* Called during PCI resource reassignment */
 249         resource_size_t (*pcibios_window_alignment)(struct pci_bus *, unsigned long type);
 250
 251         /* Reset the secondary bus of bridge */
 252         void  (*pcibios_reset_secondary_bus)(struct pci_dev *dev);
 253
 254         /* Called to shutdown machine specific hardware not already controlled
 255          * by other drivers.
 256          */
 257         void (*machine_shutdown)(void);
 258
 259 #ifdef CONFIG_KEXEC
 260         void (*kexec_cpu_down)(int crash_shutdown, int secondary);
 261
 262         /* Called to do what every setup is needed on image and the
 263          * reboot code buffer. Returns 0 on success.
 264          * Provide your own (maybe dummy) implementation if your platform
 265          * claims to support kexec.
 266          */
 267         int (*machine_kexec_prepare)(struct kimage *image);
 268
 269         /* Called to perform the _real_ kexec.
 270          * Do NOT allocate memory or fail here. We are past the point of
 271          * no return.
 272          */
 273         void (*machine_kexec)(struct kimage *image);
 274 #endif /* CONFIG_KEXEC */
 275
 276 #ifdef CONFIG_SUSPEND
 277         /* These are called to disable and enable, respectively, IRQs when
 278          * entering a suspend state.  If NULL, then the generic versions
 279          * will be called.  The generic versions disable/enable the
 280          * decrementer along with interrupts.
 281          */
 282         void (*suspend_disable_irqs)(void);
 283         void (*suspend_enable_irqs)(void);
 284 #endif
 285         int (*suspend_disable_cpu)(void);
 286
 287 #ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
 288         ssize_t (*cpu_probe)(const char *, size_t);
 289         ssize_t (*cpu_release)(const char *, size_t);
 290 #endif
 291
 292 #ifdef CONFIG_ARCH_RANDOM
 293         int (*get_random_long)(unsigned long *v);
 294 #endif
 295
 296 #ifdef CONFIG_MEMORY_HOTREMOVE
 297         int (*remove_memory)(u64, u64);
 298 #endif
 299 };
 300
 301 extern void e500_idle(void);
 302 extern void power4_idle(void);
 303 extern void power7_idle(void);
 304 extern void ppc6xx_idle(void);
 305 extern void book3e_idle(void);
 306
 307 /*
 308  * ppc_md contains a copy of the machine description structure for the
 309  * current platform. machine_id contains the initial address where the
 310  * description was found during boot.
 311  */
 312 extern struct machdep_calls ppc_md;
 313 extern struct machdep_calls *machine_id;
 314
 315 #define __machine_desc __attribute__ ((__section__ (".machine.desc")))
 316
 317 #define define_machine(name)                                    \
 318         extern struct machdep_calls mach_##name;                \
 319         EXPORT_SYMBOL(mach_##name);                             \
 320         struct machdep_calls mach_##name __machine_desc =
 321
 322 #define machine_is(name) \
 323         ({ \
 324                 extern struct machdep_calls mach_##name \
 325                         __attribute__((weak));           \
 326                 machine_id == &mach_##name; \
 327         })
 328
 329 extern void probe_machine(void);
 330
 331 #ifdef CONFIG_PPC_PMAC
 332 /*
 333  * Power macintoshes have either a CUDA, PMU or SMU controlling
 334  * system reset, power, NVRAM, RTC.
 335  */
 336 typedef enum sys_ctrler_kind {
 337         SYS_CTRLER_UNKNOWN = 0,
 338         SYS_CTRLER_CUDA = 1,
 339         SYS_CTRLER_PMU = 2,
 340         SYS_CTRLER_SMU = 3,
 341 } sys_ctrler_t;
 342 extern sys_ctrler_t sys_ctrler;
 343
 344 #endif /* CONFIG_PPC_PMAC */
 345
 346
 347 /* Functions to produce codes on the leds.
 348  * The SRC code should be unique for the message category and should
 349  * be limited to the lower 24 bits (the upper 8 are set by these funcs),
 350  * and (for boot & dump) should be sorted numerically in the order
 351  * the events occur.
 352  */
 353 /* Print a boot progress message. */
 354 void ppc64_boot_msg(unsigned int src, const char *msg);
 355
 356 static inline void log_error(char *buf, unsigned int err_type, int fatal)
 357 {
 358         if (ppc_md.log_error)
 359                 ppc_md.log_error(buf, err_type, fatal);
 360 }
 361
 362 #define __define_machine_initcall(mach, fn, id) \
 363         static int __init __machine_initcall_##mach##_##fn(void) { \
 364                 if (machine_is(mach)) return fn(); \
 365                 return 0; \
 366         } \
 367         __define_initcall(__machine_initcall_##mach##_##fn, id);
 368
 369 #define machine_early_initcall(mach, fn)        __define_machine_initcall(mach, fn, early)
 370 #define machine_core_initcall(mach, fn)         __define_machine_initcall(mach, fn, 1)
 371 #define machine_core_initcall_sync(mach, fn)    __define_machine_initcall(mach, fn, 1s)
 372 #define machine_postcore_initcall(mach, fn)     __define_machine_initcall(mach, fn, 2)
 373 #define machine_postcore_initcall_sync(mach, fn)        __define_machine_initcall(mach, fn, 2s)
 374 #define machine_arch_initcall(mach, fn)         __define_machine_initcall(mach, fn, 3)
 375 #define machine_arch_initcall_sync(mach, fn)    __define_machine_initcall(mach, fn, 3s)
 376 #define machine_subsys_initcall(mach, fn)       __define_machine_initcall(mach, fn, 4)
 377 #define machine_subsys_initcall_sync(mach, fn)  __define_machine_initcall(mach, fn, 4s)
 378 #define machine_fs_initcall(mach, fn)           __define_machine_initcall(mach, fn, 5)
 379 #define machine_fs_initcall_sync(mach, fn)      __define_machine_initcall(mach, fn, 5s)
 380 #define machine_rootfs_initcall(mach, fn)       __define_machine_initcall(mach, fn, rootfs)
 381 #define machine_device_initcall(mach, fn)       __define_machine_initcall(mach, fn, 6)
 382 #define machine_device_initcall_sync(mach, fn)  __define_machine_initcall(mach, fn, 6s)
 383 #define machine_late_initcall(mach, fn)         __define_machine_initcall(mach, fn, 7)
 384 #define machine_late_initcall_sync(mach, fn)    __define_machine_initcall(mach, fn, 7s)
 385
 386 #endif /* __KERNEL__ */
 387 #endif /* _ASM_POWERPC_MACHDEP_H */