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, unsigned long flags);
  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         int             (*hpte_removebolted)(unsigned long ea,
  58                                              int psize, int ssize);
  59         void            (*flush_hash_range)(unsigned long number, int local);
  60         void            (*hugepage_invalidate)(unsigned long vsid,
  61                                                unsigned long addr,
  62                                                unsigned char *hpte_slot_array,
  63                                                int psize, int ssize, int local);
  64         /*
  65          * Special for kexec.
  66          * To be called in real mode with interrupts disabled. No locks are
  67          * taken as such, concurrent access on pre POWER5 hardware could result
  68          * in a deadlock.
  69          * The linear mapping is destroyed as well.
  70          */
  71         void            (*hpte_clear_all)(void);
  72
  73         void __iomem *  (*ioremap)(phys_addr_t addr, unsigned long size,
  74                                    unsigned long flags, void *caller);
  75         void            (*iounmap)(volatile void __iomem *token);
  76
  77 #ifdef CONFIG_PM
  78         void            (*iommu_save)(void);
  79         void            (*iommu_restore)(void);
  80 #endif
  81 #ifdef CONFIG_MEMORY_HOTPLUG_SPARSE
  82         unsigned long   (*memory_block_size)(void);
  83 #endif
  84 #endif /* CONFIG_PPC64 */
  85
  86         /* Platform set_dma_mask and dma_get_required_mask overrides */
  87         int             (*dma_set_mask)(struct device *dev, u64 dma_mask);
  88         u64             (*dma_get_required_mask)(struct device *dev);
  89
  90         int             (*probe)(void);
  91         void            (*setup_arch)(void); /* Optional, may be NULL */
  92         void            (*init_early)(void);
  93         /* Optional, may be NULL. */
  94         void            (*show_cpuinfo)(struct seq_file *m);
  95         void            (*show_percpuinfo)(struct seq_file *m, int i);
  96         /* Returns the current operating frequency of "cpu" in Hz */
  97         unsigned long   (*get_proc_freq)(unsigned int cpu);
  98
  99         void            (*init_IRQ)(void);
 100
 101         /* Return an irq, or NO_IRQ to indicate there are none pending. */
 102         unsigned int    (*get_irq)(void);
 103
 104         /* PCI stuff */
 105         /* Called after allocating resources */
 106         void            (*pcibios_fixup)(void);
 107         void            (*pci_irq_fixup)(struct pci_dev *dev);
 108         int             (*pcibios_root_bridge_prepare)(struct pci_host_bridge
 109                                 *bridge);
 110
 111         /* To setup PHBs when using automatic OF platform driver for PCI */
 112         int             (*pci_setup_phb)(struct pci_controller *host);
 113
 114         void            (*restart)(char *cmd);
 115         void            (*halt)(void);
 116         void            (*panic)(char *str);
 117         void            (*cpu_die)(void);
 118
 119         long            (*time_init)(void); /* Optional, may be NULL */
 120
 121         int             (*set_rtc_time)(struct rtc_time *);
 122         void            (*get_rtc_time)(struct rtc_time *);
 123         unsigned long   (*get_boot_time)(void);
 124         unsigned char   (*rtc_read_val)(int addr);
 125         void            (*rtc_write_val)(int addr, unsigned char val);
 126
 127         void            (*calibrate_decr)(void);
 128
 129         void            (*progress)(char *, unsigned short);
 130
 131         /* Interface for platform error logging */
 132         void            (*log_error)(char *buf, unsigned int err_type, int fatal);
 133
 134         unsigned char   (*nvram_read_val)(int addr);
 135         void            (*nvram_write_val)(int addr, unsigned char val);
 136         ssize_t         (*nvram_write)(char *buf, size_t count, loff_t *index);
 137         ssize_t         (*nvram_read)(char *buf, size_t count, loff_t *index);
 138         ssize_t         (*nvram_size)(void);
 139         void            (*nvram_sync)(void);
 140
 141         /* Exception handlers */
 142         int             (*system_reset_exception)(struct pt_regs *regs);
 143         int             (*machine_check_exception)(struct pt_regs *regs);
 144         int             (*handle_hmi_exception)(struct pt_regs *regs);
 145
 146         /* Early exception handlers called in realmode */
 147         int             (*hmi_exception_early)(struct pt_regs *regs);
 148
 149         /* Called during machine check exception to retrive fixup address. */
 150         bool            (*mce_check_early_recovery)(struct pt_regs *regs);
 151
 152         /* Motherboard/chipset features. This is a kind of general purpose
 153          * hook used to control some machine specific features (like reset
 154          * lines, chip power control, etc...).
 155          */
 156         long            (*feature_call)(unsigned int feature, ...);
 157
 158         /* Get legacy PCI/IDE interrupt mapping */
 159         int             (*pci_get_legacy_ide_irq)(struct pci_dev *dev, int channel);
 160
 161         /* Get access protection for /dev/mem */
 162         pgprot_t        (*phys_mem_access_prot)(struct file *file,
 163                                                 unsigned long pfn,
 164                                                 unsigned long size,
 165                                                 pgprot_t vma_prot);
 166
 167         /*
 168          * Function for waiting for work with reduced power in idle loop;
 169          * called with interrupts disabled.
 170          */
 171         void            (*power_save)(void);
 172
 173         /* Function to enable performance monitor counters for this
 174            platform, called once per cpu. */
 175         void            (*enable_pmcs)(void);
 176
 177         /* Set DABR for this platform, leave empty for default implementation */
 178         int             (*set_dabr)(unsigned long dabr,
 179                                     unsigned long dabrx);
 180
 181         /* Set DAWR for this platform, leave empty for default implementation */
 182         int             (*set_dawr)(unsigned long dawr,
 183                                     unsigned long dawrx);
 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 after scan and before resource survey */
 211         void (*pcibios_fixup_phb)(struct pci_controller *hose);
 212
 213 #ifdef CONFIG_PCI_IOV
 214         void (*pcibios_fixup_sriov)(struct pci_dev *pdev);
 215         resource_size_t (*pcibios_iov_resource_alignment)(struct pci_dev *, int resno);
 216 #endif /* CONFIG_PCI_IOV */
 217
 218         /* Called to shutdown machine specific hardware not already controlled
 219          * by other drivers.
 220          */
 221         void (*machine_shutdown)(void);
 222
 223 #ifdef CONFIG_KEXEC
 224         void (*kexec_cpu_down)(int crash_shutdown, int secondary);
 225
 226         /* Called to do what every setup is needed on image and the
 227          * reboot code buffer. Returns 0 on success.
 228          * Provide your own (maybe dummy) implementation if your platform
 229          * claims to support kexec.
 230          */
 231         int (*machine_kexec_prepare)(struct kimage *image);
 232
 233         /* Called to perform the _real_ kexec.
 234          * Do NOT allocate memory or fail here. We are past the point of
 235          * no return.
 236          */
 237         void (*machine_kexec)(struct kimage *image);
 238 #endif /* CONFIG_KEXEC */
 239
 240 #ifdef CONFIG_SUSPEND
 241         /* These are called to disable and enable, respectively, IRQs when
 242          * entering a suspend state.  If NULL, then the generic versions
 243          * will be called.  The generic versions disable/enable the
 244          * decrementer along with interrupts.
 245          */
 246         void (*suspend_disable_irqs)(void);
 247         void (*suspend_enable_irqs)(void);
 248 #endif
 249         int (*suspend_disable_cpu)(void);
 250
 251 #ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
 252         ssize_t (*cpu_probe)(const char *, size_t);
 253         ssize_t (*cpu_release)(const char *, size_t);
 254 #endif
 255
 256 #ifdef CONFIG_ARCH_RANDOM
 257         int (*get_random_seed)(unsigned long *v);
 258 #endif
 259 };
 260
 261 extern void e500_idle(void);
 262 extern void power4_idle(void);
 263 extern void power7_idle(void);
 264 extern void ppc6xx_idle(void);
 265 extern void book3e_idle(void);
 266
 267 /*
 268  * ppc_md contains a copy of the machine description structure for the
 269  * current platform. machine_id contains the initial address where the
 270  * description was found during boot.
 271  */
 272 extern struct machdep_calls ppc_md;
 273 extern struct machdep_calls *machine_id;
 274
 275 #define __machine_desc __attribute__ ((__section__ (".machine.desc")))
 276
 277 #define define_machine(name)                                    \
 278         extern struct machdep_calls mach_##name;                \
 279         EXPORT_SYMBOL(mach_##name);                             \
 280         struct machdep_calls mach_##name __machine_desc =
 281
 282 #define machine_is(name) \
 283         ({ \
 284                 extern struct machdep_calls mach_##name \
 285                         __attribute__((weak));           \
 286                 machine_id == &mach_##name; \
 287         })
 288
 289 extern void probe_machine(void);
 290
 291 #ifdef CONFIG_PPC_PMAC
 292 /*
 293  * Power macintoshes have either a CUDA, PMU or SMU controlling
 294  * system reset, power, NVRAM, RTC.
 295  */
 296 typedef enum sys_ctrler_kind {
 297         SYS_CTRLER_UNKNOWN = 0,
 298         SYS_CTRLER_CUDA = 1,
 299         SYS_CTRLER_PMU = 2,
 300         SYS_CTRLER_SMU = 3,
 301 } sys_ctrler_t;
 302 extern sys_ctrler_t sys_ctrler;
 303
 304 #endif /* CONFIG_PPC_PMAC */
 305
 306 static inline void log_error(char *buf, unsigned int err_type, int fatal)
 307 {
 308         if (ppc_md.log_error)
 309                 ppc_md.log_error(buf, err_type, fatal);
 310 }
 311
 312 #define __define_machine_initcall(mach, fn, id) \
 313         static int __init __machine_initcall_##mach##_##fn(void) { \
 314                 if (machine_is(mach)) return fn(); \
 315                 return 0; \
 316         } \
 317         __define_initcall(__machine_initcall_##mach##_##fn, id);
 318
 319 #define machine_early_initcall(mach, fn)        __define_machine_initcall(mach, fn, early)
 320 #define machine_core_initcall(mach, fn)         __define_machine_initcall(mach, fn, 1)
 321 #define machine_core_initcall_sync(mach, fn)    __define_machine_initcall(mach, fn, 1s)
 322 #define machine_postcore_initcall(mach, fn)     __define_machine_initcall(mach, fn, 2)
 323 #define machine_postcore_initcall_sync(mach, fn)        __define_machine_initcall(mach, fn, 2s)
 324 #define machine_arch_initcall(mach, fn)         __define_machine_initcall(mach, fn, 3)
 325 #define machine_arch_initcall_sync(mach, fn)    __define_machine_initcall(mach, fn, 3s)
 326 #define machine_subsys_initcall(mach, fn)       __define_machine_initcall(mach, fn, 4)
 327 #define machine_subsys_initcall_sync(mach, fn)  __define_machine_initcall(mach, fn, 4s)
 328 #define machine_fs_initcall(mach, fn)           __define_machine_initcall(mach, fn, 5)
 329 #define machine_fs_initcall_sync(mach, fn)      __define_machine_initcall(mach, fn, 5s)
 330 #define machine_rootfs_initcall(mach, fn)       __define_machine_initcall(mach, fn, rootfs)
 331 #define machine_device_initcall(mach, fn)       __define_machine_initcall(mach, fn, 6)
 332 #define machine_device_initcall_sync(mach, fn)  __define_machine_initcall(mach, fn, 6s)
 333 #define machine_late_initcall(mach, fn)         __define_machine_initcall(mach, fn, 7)
 334 #define machine_late_initcall_sync(mach, fn)    __define_machine_initcall(mach, fn, 7s)
 335
 336 #endif /* __KERNEL__ */
 337 #endif /* _ASM_POWERPC_MACHDEP_H */