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