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)(struct mm_struct *mm,
  61                                                unsigned char *hpte_slot_array,
  62                                                unsigned long addr, int psize);
  63
  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         void __iomem *  (*ioremap)(phys_addr_t addr, unsigned long size,
  82                                    unsigned long flags, void *caller);
  83         void            (*iounmap)(volatile void __iomem *token);
  84
  85 #ifdef CONFIG_PM
  86         void            (*iommu_save)(void);
  87         void            (*iommu_restore)(void);
  88 #endif
  89 #endif /* CONFIG_PPC64 */
  90
  91         void            (*pci_dma_dev_setup)(struct pci_dev *dev);
  92         void            (*pci_dma_bus_setup)(struct pci_bus *bus);
  93
  94         /* Platform set_dma_mask and dma_get_required_mask overrides */
  95         int             (*dma_set_mask)(struct device *dev, u64 dma_mask);
  96         u64             (*dma_get_required_mask)(struct device *dev);
  97
  98         int             (*probe)(void);
  99         void            (*setup_arch)(void); /* Optional, may be NULL */
 100         void            (*init_early)(void);
 101         /* Optional, may be NULL. */
 102         void            (*show_cpuinfo)(struct seq_file *m);
 103         void            (*show_percpuinfo)(struct seq_file *m, int i);
 104
 105         void            (*init_IRQ)(void);
 106
 107         /* Return an irq, or NO_IRQ to indicate there are none pending. */
 108         unsigned int    (*get_irq)(void);
 109
 110         /* PCI stuff */
 111         /* Called after scanning the bus, before allocating resources */
 112         void            (*pcibios_fixup)(void);
 113         int             (*pci_probe_mode)(struct pci_bus *);
 114         void            (*pci_irq_fixup)(struct pci_dev *dev);
 115         int             (*pcibios_root_bridge_prepare)(struct pci_host_bridge
 116                                 *bridge);
 117
 118         /* To setup PHBs when using automatic OF platform driver for PCI */
 119         int             (*pci_setup_phb)(struct pci_controller *host);
 120
 121 #ifdef CONFIG_PCI_MSI
 122         int             (*msi_check_device)(struct pci_dev* dev,
 123                                             int nvec, int type);
 124         int             (*setup_msi_irqs)(struct pci_dev *dev,
 125                                           int nvec, int type);
 126         void            (*teardown_msi_irqs)(struct pci_dev *dev);
 127 #endif
 128
 129         void            (*restart)(char *cmd);
 130         void            (*power_off)(void);
 131         void            (*halt)(void);
 132         void            (*panic)(char *str);
 133         void            (*cpu_die)(void);
 134
 135         long            (*time_init)(void); /* Optional, may be NULL */
 136
 137         int             (*set_rtc_time)(struct rtc_time *);
 138         void            (*get_rtc_time)(struct rtc_time *);
 139         unsigned long   (*get_boot_time)(void);
 140         unsigned char   (*rtc_read_val)(int addr);
 141         void            (*rtc_write_val)(int addr, unsigned char val);
 142
 143         void            (*calibrate_decr)(void);
 144
 145         void            (*progress)(char *, unsigned short);
 146
 147         /* Interface for platform error logging */
 148         void            (*log_error)(char *buf, unsigned int err_type, int fatal);
 149
 150         unsigned char   (*nvram_read_val)(int addr);
 151         void            (*nvram_write_val)(int addr, unsigned char val);
 152         ssize_t         (*nvram_write)(char *buf, size_t count, loff_t *index);
 153         ssize_t         (*nvram_read)(char *buf, size_t count, loff_t *index);
 154         ssize_t         (*nvram_size)(void);
 155         void            (*nvram_sync)(void);
 156
 157         /* Exception handlers */
 158         int             (*system_reset_exception)(struct pt_regs *regs);
 159         int             (*machine_check_exception)(struct pt_regs *regs);
 160
 161         /* Motherboard/chipset features. This is a kind of general purpose
 162          * hook used to control some machine specific features (like reset
 163          * lines, chip power control, etc...).
 164          */
 165         long            (*feature_call)(unsigned int feature, ...);
 166
 167         /* Get legacy PCI/IDE interrupt mapping */
 168         int             (*pci_get_legacy_ide_irq)(struct pci_dev *dev, int channel);
 169
 170         /* Get access protection for /dev/mem */
 171         pgprot_t        (*phys_mem_access_prot)(struct file *file,
 172                                                 unsigned long pfn,
 173                                                 unsigned long size,
 174                                                 pgprot_t vma_prot);
 175
 176         /*
 177          * Function for waiting for work with reduced power in idle loop;
 178          * called with interrupts disabled.
 179          */
 180         void            (*power_save)(void);
 181
 182         /* Function to enable performance monitor counters for this
 183            platform, called once per cpu. */
 184         void            (*enable_pmcs)(void);
 185
 186         /* Set DABR for this platform, leave empty for default implemenation */
 187         int             (*set_dabr)(unsigned long dabr,
 188                                     unsigned long dabrx);
 189
 190         /* Set DAWR for this platform, leave empty for default implemenation */
 191         int             (*set_dawr)(unsigned long dawr,
 192                                     unsigned long dawrx);
 193
 194 #ifdef CONFIG_PPC32     /* XXX for now */
 195         /* A general init function, called by ppc_init in init/main.c.
 196            May be NULL. */
 197         void            (*init)(void);
 198
 199         void            (*kgdb_map_scc)(void);
 200
 201         /*
 202          * optional PCI "hooks"
 203          */
 204         /* Called at then very end of pcibios_init() */
 205         void (*pcibios_after_init)(void);
 206
 207 #endif /* CONFIG_PPC32 */
 208
 209         /* Called in indirect_* to avoid touching devices */
 210         int (*pci_exclude_device)(struct pci_controller *, unsigned char, unsigned char);
 211
 212         /* Called after PPC generic resource fixup to perform
 213            machine specific fixups */
 214         void (*pcibios_fixup_resources)(struct pci_dev *);
 215
 216         /* Called for each PCI bus in the system when it's probed */
 217         void (*pcibios_fixup_bus)(struct pci_bus *);
 218
 219         /* Called when pci_enable_device() is called. Returns 0 to
 220          * allow assignment/enabling of the device. */
 221         int  (*pcibios_enable_device_hook)(struct pci_dev *);
 222
 223         /* Called after scan and before resource survey */
 224         void (*pcibios_fixup_phb)(struct pci_controller *hose);
 225
 226         /* Called during PCI resource reassignment */
 227         resource_size_t (*pcibios_window_alignment)(struct pci_bus *, unsigned long type);
 228
 229         /* Called to shutdown machine specific hardware not already controlled
 230          * by other drivers.
 231          */
 232         void (*machine_shutdown)(void);
 233
 234 #ifdef CONFIG_KEXEC
 235         void (*kexec_cpu_down)(int crash_shutdown, int secondary);
 236
 237         /* Called to do what every setup is needed on image and the
 238          * reboot code buffer. Returns 0 on success.
 239          * Provide your own (maybe dummy) implementation if your platform
 240          * claims to support kexec.
 241          */
 242         int (*machine_kexec_prepare)(struct kimage *image);
 243
 244         /* Called to perform the _real_ kexec.
 245          * Do NOT allocate memory or fail here. We are past the point of
 246          * no return.
 247          */
 248         void (*machine_kexec)(struct kimage *image);
 249 #endif /* CONFIG_KEXEC */
 250
 251 #ifdef CONFIG_SUSPEND
 252         /* These are called to disable and enable, respectively, IRQs when
 253          * entering a suspend state.  If NULL, then the generic versions
 254          * will be called.  The generic versions disable/enable the
 255          * decrementer along with interrupts.
 256          */
 257         void (*suspend_disable_irqs)(void);
 258         void (*suspend_enable_irqs)(void);
 259 #endif
 260         int (*suspend_disable_cpu)(void);
 261
 262 #ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
 263         ssize_t (*cpu_probe)(const char *, size_t);
 264         ssize_t (*cpu_release)(const char *, size_t);
 265 #endif
 266 };
 267
 268 extern void e500_idle(void);
 269 extern void power4_idle(void);
 270 extern void power7_idle(void);
 271 extern void ppc6xx_idle(void);
 272 extern void book3e_idle(void);
 273
 274 /*
 275  * ppc_md contains a copy of the machine description structure for the
 276  * current platform. machine_id contains the initial address where the
 277  * description was found during boot.
 278  */
 279 extern struct machdep_calls ppc_md;
 280 extern struct machdep_calls *machine_id;
 281
 282 #define __machine_desc __attribute__ ((__section__ (".machine.desc")))
 283
 284 #define define_machine(name)                                    \
 285         extern struct machdep_calls mach_##name;                \
 286         EXPORT_SYMBOL(mach_##name);                             \
 287         struct machdep_calls mach_##name __machine_desc =
 288
 289 #define machine_is(name) \
 290         ({ \
 291                 extern struct machdep_calls mach_##name \
 292                         __attribute__((weak));           \
 293                 machine_id == &mach_##name; \
 294         })
 295
 296 extern void probe_machine(void);
 297
 298 extern char cmd_line[COMMAND_LINE_SIZE];
 299
 300 #ifdef CONFIG_PPC_PMAC
 301 /*
 302  * Power macintoshes have either a CUDA, PMU or SMU controlling
 303  * system reset, power, NVRAM, RTC.
 304  */
 305 typedef enum sys_ctrler_kind {
 306         SYS_CTRLER_UNKNOWN = 0,
 307         SYS_CTRLER_CUDA = 1,
 308         SYS_CTRLER_PMU = 2,
 309         SYS_CTRLER_SMU = 3,
 310 } sys_ctrler_t;
 311 extern sys_ctrler_t sys_ctrler;
 312
 313 #endif /* CONFIG_PPC_PMAC */
 314
 315
 316 /* Functions to produce codes on the leds.
 317  * The SRC code should be unique for the message category and should
 318  * be limited to the lower 24 bits (the upper 8 are set by these funcs),
 319  * and (for boot & dump) should be sorted numerically in the order
 320  * the events occur.
 321  */
 322 /* Print a boot progress message. */
 323 void ppc64_boot_msg(unsigned int src, const char *msg);
 324
 325 static inline void log_error(char *buf, unsigned int err_type, int fatal)
 326 {
 327         if (ppc_md.log_error)
 328                 ppc_md.log_error(buf, err_type, fatal);
 329 }
 330
 331 #define __define_machine_initcall(mach, fn, id) \
 332         static int __init __machine_initcall_##mach##_##fn(void) { \
 333                 if (machine_is(mach)) return fn(); \
 334                 return 0; \
 335         } \
 336         __define_initcall(__machine_initcall_##mach##_##fn, id);
 337
 338 #define machine_core_initcall(mach, fn)         __define_machine_initcall(mach, fn, 1)
 339 #define machine_core_initcall_sync(mach, fn)    __define_machine_initcall(mach, fn, 1s)
 340 #define machine_postcore_initcall(mach, fn)     __define_machine_initcall(mach, fn, 2)
 341 #define machine_postcore_initcall_sync(mach, fn)        __define_machine_initcall(mach, fn, 2s)
 342 #define machine_arch_initcall(mach, fn)         __define_machine_initcall(mach, fn, 3)
 343 #define machine_arch_initcall_sync(mach, fn)    __define_machine_initcall(mach, fn, 3s)
 344 #define machine_subsys_initcall(mach, fn)       __define_machine_initcall(mach, fn, 4)
 345 #define machine_subsys_initcall_sync(mach, fn)  __define_machine_initcall(mach, fn, 4s)
 346 #define machine_fs_initcall(mach, fn)           __define_machine_initcall(mach, fn, 5)
 347 #define machine_fs_initcall_sync(mach, fn)      __define_machine_initcall(mach, fn, 5s)
 348 #define machine_rootfs_initcall(mach, fn)       __define_machine_initcall(mach, fn, rootfs)
 349 #define machine_device_initcall(mach, fn)       __define_machine_initcall(mach, fn, 6)
 350 #define machine_device_initcall_sync(mach, fn)  __define_machine_initcall(mach, fn, 6s)
 351 #define machine_late_initcall(mach, fn)         __define_machine_initcall(mach, fn, 7)
 352 #define machine_late_initcall_sync(mach, fn)    __define_machine_initcall(mach, fn, 7s)
 353
 354 #endif /* __KERNEL__ */
 355 #endif /* _ASM_POWERPC_MACHDEP_H */