linux/arch/powerpc/include/asm/machdep.h
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   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
  23struct pt_regs;
  24struct pci_bus; 
  25struct device_node;
  26struct iommu_table;
  27struct rtc_time;
  28struct file;
  29struct pci_controller;
  30#ifdef CONFIG_KEXEC
  31struct kimage;
  32#endif
  33
  34#ifdef CONFIG_SMP
  35struct smp_ops_t {
  36        void  (*message_pass)(int target, int msg);
  37        int   (*probe)(void);
  38        void  (*kick_cpu)(int nr);
  39        void  (*setup_cpu)(int nr);
  40        void  (*take_timebase)(void);
  41        void  (*give_timebase)(void);
  42        int   (*cpu_enable)(unsigned int nr);
  43        int   (*cpu_disable)(void);
  44        void  (*cpu_die)(unsigned int nr);
  45        int   (*cpu_bootable)(unsigned int nr);
  46};
  47#endif
  48
  49struct machdep_calls {
  50        char            *name;
  51#ifdef CONFIG_PPC64
  52        void            (*hpte_invalidate)(unsigned long slot,
  53                                           unsigned long va,
  54                                           int psize, int ssize,
  55                                           int local);
  56        long            (*hpte_updatepp)(unsigned long slot, 
  57                                         unsigned long newpp, 
  58                                         unsigned long va,
  59                                         int psize, int ssize,
  60                                         int local);
  61        void            (*hpte_updateboltedpp)(unsigned long newpp, 
  62                                               unsigned long ea,
  63                                               int psize, int ssize);
  64        long            (*hpte_insert)(unsigned long hpte_group,
  65                                       unsigned long va,
  66                                       unsigned long prpn,
  67                                       unsigned long rflags,
  68                                       unsigned long vflags,
  69                                       int psize, int ssize);
  70        long            (*hpte_remove)(unsigned long hpte_group);
  71        void            (*hpte_removebolted)(unsigned long ea,
  72                                             int psize, int ssize);
  73        void            (*flush_hash_range)(unsigned long number, int local);
  74
  75        /* special for kexec, to be called in real mode, linar mapping is
  76         * destroyed as well */
  77        void            (*hpte_clear_all)(void);
  78
  79        int             (*tce_build)(struct iommu_table *tbl,
  80                                     long index,
  81                                     long npages,
  82                                     unsigned long uaddr,
  83                                     enum dma_data_direction direction,
  84                                     struct dma_attrs *attrs);
  85        void            (*tce_free)(struct iommu_table *tbl,
  86                                    long index,
  87                                    long npages);
  88        unsigned long   (*tce_get)(struct iommu_table *tbl,
  89                                    long index);
  90        void            (*tce_flush)(struct iommu_table *tbl);
  91
  92        void __iomem *  (*ioremap)(phys_addr_t addr, unsigned long size,
  93                                   unsigned long flags, void *caller);
  94        void            (*iounmap)(volatile void __iomem *token);
  95
  96#ifdef CONFIG_PM
  97        void            (*iommu_save)(void);
  98        void            (*iommu_restore)(void);
  99#endif
 100#endif /* CONFIG_PPC64 */
 101
 102        void            (*pci_dma_dev_setup)(struct pci_dev *dev);
 103        void            (*pci_dma_bus_setup)(struct pci_bus *bus);
 104
 105        int             (*probe)(void);
 106        void            (*setup_arch)(void); /* Optional, may be NULL */
 107        void            (*init_early)(void);
 108        /* Optional, may be NULL. */
 109        void            (*show_cpuinfo)(struct seq_file *m);
 110        void            (*show_percpuinfo)(struct seq_file *m, int i);
 111
 112        void            (*init_IRQ)(void);
 113        unsigned int    (*get_irq)(void);
 114#ifdef CONFIG_KEXEC
 115        void            (*kexec_cpu_down)(int crash_shutdown, int secondary);
 116#endif
 117
 118        /* PCI stuff */
 119        /* Called after scanning the bus, before allocating resources */
 120        void            (*pcibios_fixup)(void);
 121        int             (*pci_probe_mode)(struct pci_bus *);
 122        void            (*pci_irq_fixup)(struct pci_dev *dev);
 123
 124        /* To setup PHBs when using automatic OF platform driver for PCI */
 125        int             (*pci_setup_phb)(struct pci_controller *host);
 126
 127#ifdef CONFIG_PCI_MSI
 128        int             (*msi_check_device)(struct pci_dev* dev,
 129                                            int nvec, int type);
 130        int             (*setup_msi_irqs)(struct pci_dev *dev,
 131                                          int nvec, int type);
 132        void            (*teardown_msi_irqs)(struct pci_dev *dev);
 133#endif
 134
 135        void            (*restart)(char *cmd);
 136        void            (*power_off)(void);
 137        void            (*halt)(void);
 138        void            (*panic)(char *str);
 139        void            (*cpu_die)(void);
 140
 141        long            (*time_init)(void); /* Optional, may be NULL */
 142
 143        int             (*set_rtc_time)(struct rtc_time *);
 144        void            (*get_rtc_time)(struct rtc_time *);
 145        unsigned long   (*get_boot_time)(void);
 146        unsigned char   (*rtc_read_val)(int addr);
 147        void            (*rtc_write_val)(int addr, unsigned char val);
 148
 149        void            (*calibrate_decr)(void);
 150
 151        void            (*progress)(char *, unsigned short);
 152
 153        /* Interface for platform error logging */
 154        void            (*log_error)(char *buf, unsigned int err_type, int fatal);
 155
 156        unsigned char   (*nvram_read_val)(int addr);
 157        void            (*nvram_write_val)(int addr, unsigned char val);
 158        ssize_t         (*nvram_write)(char *buf, size_t count, loff_t *index);
 159        ssize_t         (*nvram_read)(char *buf, size_t count, loff_t *index);  
 160        ssize_t         (*nvram_size)(void);            
 161        void            (*nvram_sync)(void);
 162
 163        /* Exception handlers */
 164        int             (*system_reset_exception)(struct pt_regs *regs);
 165        int             (*machine_check_exception)(struct pt_regs *regs);
 166
 167        /* Motherboard/chipset features. This is a kind of general purpose
 168         * hook used to control some machine specific features (like reset
 169         * lines, chip power control, etc...).
 170         */
 171        long            (*feature_call)(unsigned int feature, ...);
 172
 173        /* Get legacy PCI/IDE interrupt mapping */ 
 174        int             (*pci_get_legacy_ide_irq)(struct pci_dev *dev, int channel);
 175        
 176        /* Get access protection for /dev/mem */
 177        pgprot_t        (*phys_mem_access_prot)(struct file *file,
 178                                                unsigned long pfn,
 179                                                unsigned long size,
 180                                                pgprot_t vma_prot);
 181
 182        /* Idle loop for this platform, leave empty for default idle loop */
 183        void            (*idle_loop)(void);
 184
 185        /*
 186         * Function for waiting for work with reduced power in idle loop;
 187         * called with interrupts disabled.
 188         */
 189        void            (*power_save)(void);
 190
 191        /* Function to enable performance monitor counters for this
 192           platform, called once per cpu. */
 193        void            (*enable_pmcs)(void);
 194
 195        /* Set DABR for this platform, leave empty for default implemenation */
 196        int             (*set_dabr)(unsigned long dabr);
 197
 198#ifdef CONFIG_PPC32     /* XXX for now */
 199        /* A general init function, called by ppc_init in init/main.c.
 200           May be NULL. */
 201        void            (*init)(void);
 202
 203        void            (*kgdb_map_scc)(void);
 204
 205        /*
 206         * optional PCI "hooks"
 207         */
 208        /* Called in indirect_* to avoid touching devices */
 209        int (*pci_exclude_device)(struct pci_controller *, unsigned char, unsigned char);
 210
 211        /* Called at then very end of pcibios_init() */
 212        void (*pcibios_after_init)(void);
 213
 214#endif /* CONFIG_PPC32 */
 215
 216        /* Called after PPC generic resource fixup to perform
 217           machine specific fixups */
 218        void (*pcibios_fixup_resources)(struct pci_dev *);
 219
 220        /* Called for each PCI bus in the system when it's probed */
 221        void (*pcibios_fixup_bus)(struct pci_bus *);
 222
 223        /* Called when pci_enable_device() is called. Returns 0 to
 224         * allow assignment/enabling of the device. */
 225        int  (*pcibios_enable_device_hook)(struct pci_dev *);
 226
 227        /* Called to shutdown machine specific hardware not already controlled
 228         * by other drivers.
 229         */
 230        void (*machine_shutdown)(void);
 231
 232#ifdef CONFIG_KEXEC
 233        /* Called to do the minimal shutdown needed to run a kexec'd kernel
 234         * to run successfully.
 235         * XXX Should we move this one out of kexec scope?
 236         */
 237        void (*machine_crash_shutdown)(struct pt_regs *regs);
 238
 239        /* Called to do what every setup is needed on image and the
 240         * reboot code buffer. Returns 0 on success.
 241         * Provide your own (maybe dummy) implementation if your platform
 242         * claims to support kexec.
 243         */
 244        int (*machine_kexec_prepare)(struct kimage *image);
 245
 246        /* Called to handle any machine specific cleanup on image */
 247        void (*machine_kexec_cleanup)(struct kimage *image);
 248
 249        /* Called to perform the _real_ kexec.
 250         * Do NOT allocate memory or fail here. We are past the point of
 251         * no return.
 252         */
 253        void (*machine_kexec)(struct kimage *image);
 254#endif /* CONFIG_KEXEC */
 255
 256#ifdef CONFIG_SUSPEND
 257        /* These are called to disable and enable, respectively, IRQs when
 258         * entering a suspend state.  If NULL, then the generic versions
 259         * will be called.  The generic versions disable/enable the
 260         * decrementer along with interrupts.
 261         */
 262        void (*suspend_disable_irqs)(void);
 263        void (*suspend_enable_irqs)(void);
 264#endif
 265};
 266
 267extern void e500_idle(void);
 268extern void power4_idle(void);
 269extern void power4_cpu_offline_powersave(void);
 270extern void ppc6xx_idle(void);
 271
 272/*
 273 * ppc_md contains a copy of the machine description structure for the
 274 * current platform. machine_id contains the initial address where the
 275 * description was found during boot.
 276 */
 277extern struct machdep_calls ppc_md;
 278extern struct machdep_calls *machine_id;
 279
 280#define __machine_desc __attribute__ ((__section__ (".machine.desc")))
 281
 282#define define_machine(name)                                    \
 283        extern struct machdep_calls mach_##name;                \
 284        EXPORT_SYMBOL(mach_##name);                             \
 285        struct machdep_calls mach_##name __machine_desc =
 286
 287#define machine_is(name) \
 288        ({ \
 289                extern struct machdep_calls mach_##name \
 290                        __attribute__((weak));           \
 291                machine_id == &mach_##name; \
 292        })
 293
 294extern void probe_machine(void);
 295
 296extern char cmd_line[COMMAND_LINE_SIZE];
 297
 298#ifdef CONFIG_PPC_PMAC
 299/*
 300 * Power macintoshes have either a CUDA, PMU or SMU controlling
 301 * system reset, power, NVRAM, RTC.
 302 */
 303typedef enum sys_ctrler_kind {
 304        SYS_CTRLER_UNKNOWN = 0,
 305        SYS_CTRLER_CUDA = 1,
 306        SYS_CTRLER_PMU = 2,
 307        SYS_CTRLER_SMU = 3,
 308} sys_ctrler_t;
 309extern sys_ctrler_t sys_ctrler;
 310
 311#endif /* CONFIG_PPC_PMAC */
 312
 313extern void setup_pci_ptrs(void);
 314
 315#ifdef CONFIG_SMP
 316/* Poor default implementations */
 317extern void __devinit smp_generic_give_timebase(void);
 318extern void __devinit smp_generic_take_timebase(void);
 319#endif /* CONFIG_SMP */
 320
 321
 322/* Functions to produce codes on the leds.
 323 * The SRC code should be unique for the message category and should
 324 * be limited to the lower 24 bits (the upper 8 are set by these funcs),
 325 * and (for boot & dump) should be sorted numerically in the order
 326 * the events occur.
 327 */
 328/* Print a boot progress message. */
 329void ppc64_boot_msg(unsigned int src, const char *msg);
 330
 331static inline void log_error(char *buf, unsigned int err_type, int fatal)
 332{
 333        if (ppc_md.log_error)
 334                ppc_md.log_error(buf, err_type, fatal);
 335}
 336
 337#define __define_machine_initcall(mach,level,fn,id) \
 338        static int __init __machine_initcall_##mach##_##fn(void) { \
 339                if (machine_is(mach)) return fn(); \
 340                return 0; \
 341        } \
 342        __define_initcall(level,__machine_initcall_##mach##_##fn,id);
 343
 344#define machine_core_initcall(mach,fn)          __define_machine_initcall(mach,"1",fn,1)
 345#define machine_core_initcall_sync(mach,fn)     __define_machine_initcall(mach,"1s",fn,1s)
 346#define machine_postcore_initcall(mach,fn)      __define_machine_initcall(mach,"2",fn,2)
 347#define machine_postcore_initcall_sync(mach,fn) __define_machine_initcall(mach,"2s",fn,2s)
 348#define machine_arch_initcall(mach,fn)          __define_machine_initcall(mach,"3",fn,3)
 349#define machine_arch_initcall_sync(mach,fn)     __define_machine_initcall(mach,"3s",fn,3s)
 350#define machine_subsys_initcall(mach,fn)        __define_machine_initcall(mach,"4",fn,4)
 351#define machine_subsys_initcall_sync(mach,fn)   __define_machine_initcall(mach,"4s",fn,4s)
 352#define machine_fs_initcall(mach,fn)            __define_machine_initcall(mach,"5",fn,5)
 353#define machine_fs_initcall_sync(mach,fn)       __define_machine_initcall(mach,"5s",fn,5s)
 354#define machine_rootfs_initcall(mach,fn)        __define_machine_initcall(mach,"rootfs",fn,rootfs)
 355#define machine_device_initcall(mach,fn)        __define_machine_initcall(mach,"6",fn,6)
 356#define machine_device_initcall_sync(mach,fn)   __define_machine_initcall(mach,"6s",fn,6s)
 357#define machine_late_initcall(mach,fn)          __define_machine_initcall(mach,"7",fn,7)
 358#define machine_late_initcall_sync(mach,fn)     __define_machine_initcall(mach,"7s",fn,7s)
 359
 360void generic_suspend_disable_irqs(void);
 361void generic_suspend_enable_irqs(void);
 362
 363#endif /* __KERNEL__ */
 364#endif /* _ASM_POWERPC_MACHDEP_H */
 365