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