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