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         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)(unsigned long vsid,
  61                                                unsigned long addr,
  62                                                unsigned char *hpte_slot_array,
  63                                                int psize, int ssize, int local);
  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         void __iomem *  (*ioremap)(phys_addr_t addr, unsigned long size,
  69                                    unsigned long flags, void *caller);
  70         void            (*iounmap)(volatile void __iomem *token);
  71
  72 #ifdef CONFIG_PM
  73         void            (*iommu_save)(void);
  74         void            (*iommu_restore)(void);
  75 #endif
  76 #ifdef CONFIG_MEMORY_HOTPLUG_SPARSE
  77         unsigned long   (*memory_block_size)(void);
  78 #endif
  79 #endif /* CONFIG_PPC64 */
  80
  81         /* Platform set_dma_mask and dma_get_required_mask overrides */
  82         int             (*dma_set_mask)(struct device *dev, u64 dma_mask);
  83         u64             (*dma_get_required_mask)(struct device *dev);
  84
  85         int             (*probe)(void);
  86         void            (*setup_arch)(void); /* Optional, may be NULL */
  87         void            (*init_early)(void);
  88         /* Optional, may be NULL. */
  89         void            (*show_cpuinfo)(struct seq_file *m);
  90         void            (*show_percpuinfo)(struct seq_file *m, int i);
  91         /* Returns the current operating frequency of "cpu" in Hz */
  92         unsigned long   (*get_proc_freq)(unsigned int cpu);
  93
  94         void            (*init_IRQ)(void);
  95
  96         /* Return an irq, or NO_IRQ to indicate there are none pending. */
  97         unsigned int    (*get_irq)(void);
  98
  99         /* PCI stuff */
 100         /* Called after allocating resources */
 101         void            (*pcibios_fixup)(void);
 102         void            (*pci_irq_fixup)(struct pci_dev *dev);
 103         int             (*pcibios_root_bridge_prepare)(struct pci_host_bridge
 104                                 *bridge);
 105
 106         /* To setup PHBs when using automatic OF platform driver for PCI */
 107         int             (*pci_setup_phb)(struct pci_controller *host);
 108
 109         void            (*restart)(char *cmd);
 110         void            (*halt)(void);
 111         void            (*panic)(char *str);
 112         void            (*cpu_die)(void);
 113
 114         long            (*time_init)(void); /* Optional, may be NULL */
 115
 116         int             (*set_rtc_time)(struct rtc_time *);
 117         void            (*get_rtc_time)(struct rtc_time *);
 118         unsigned long   (*get_boot_time)(void);
 119         unsigned char   (*rtc_read_val)(int addr);
 120         void            (*rtc_write_val)(int addr, unsigned char val);
 121
 122         void            (*calibrate_decr)(void);
 123
 124         void            (*progress)(char *, unsigned short);
 125
 126         /* Interface for platform error logging */
 127         void            (*log_error)(char *buf, unsigned int err_type, int fatal);
 128
 129         unsigned char   (*nvram_read_val)(int addr);
 130         void            (*nvram_write_val)(int addr, unsigned char val);
 131         ssize_t         (*nvram_write)(char *buf, size_t count, loff_t *index);
 132         ssize_t         (*nvram_read)(char *buf, size_t count, loff_t *index);
 133         ssize_t         (*nvram_size)(void);
 134         void            (*nvram_sync)(void);
 135
 136         /* Exception handlers */
 137         int             (*system_reset_exception)(struct pt_regs *regs);
 138         int             (*machine_check_exception)(struct pt_regs *regs);
 139         int             (*handle_hmi_exception)(struct pt_regs *regs);
 140
 141         /* Early exception handlers called in realmode */
 142         int             (*hmi_exception_early)(struct pt_regs *regs);
 143
 144         /* Called during machine check exception to retrive fixup address. */
 145         bool            (*mce_check_early_recovery)(struct pt_regs *regs);
 146
 147         /* Motherboard/chipset features. This is a kind of general purpose
 148          * hook used to control some machine specific features (like reset
 149          * lines, chip power control, etc...).
 150          */
 151         long            (*feature_call)(unsigned int feature, ...);
 152
 153         /* Get legacy PCI/IDE interrupt mapping */
 154         int             (*pci_get_legacy_ide_irq)(struct pci_dev *dev, int channel);
 155
 156         /* Get access protection for /dev/mem */
 157         pgprot_t        (*phys_mem_access_prot)(struct file *file,
 158                                                 unsigned long pfn,
 159                                                 unsigned long size,
 160                                                 pgprot_t vma_prot);
 161
 162         /*
 163          * Function for waiting for work with reduced power in idle loop;
 164          * called with interrupts disabled.
 165          */
 166         void            (*power_save)(void);
 167
 168         /* Function to enable performance monitor counters for this
 169            platform, called once per cpu. */
 170         void            (*enable_pmcs)(void);
 171
 172         /* Set DABR for this platform, leave empty for default implemenation */
 173         int             (*set_dabr)(unsigned long dabr,
 174                                     unsigned long dabrx);
 175
 176         /* Set DAWR for this platform, leave empty for default implemenation */
 177         int             (*set_dawr)(unsigned long dawr,
 178                                     unsigned long dawrx);
 179
 180 #ifdef CONFIG_PPC32     /* XXX for now */
 181         /* A general init function, called by ppc_init in init/main.c.
 182            May be NULL. */
 183         void            (*init)(void);
 184
 185         void            (*kgdb_map_scc)(void);
 186
 187         /*
 188          * optional PCI "hooks"
 189          */
 190         /* Called at then very end of pcibios_init() */
 191         void (*pcibios_after_init)(void);
 192
 193 #endif /* CONFIG_PPC32 */
 194
 195         /* Called in indirect_* to avoid touching devices */
 196         int (*pci_exclude_device)(struct pci_controller *, unsigned char, unsigned char);
 197
 198         /* Called after PPC generic resource fixup to perform
 199            machine specific fixups */
 200         void (*pcibios_fixup_resources)(struct pci_dev *);
 201
 202         /* Called for each PCI bus in the system when it's probed */
 203         void (*pcibios_fixup_bus)(struct pci_bus *);
 204
 205         /* Called after scan and before resource survey */
 206         void (*pcibios_fixup_phb)(struct pci_controller *hose);
 207
 208 #ifdef CONFIG_PCI_IOV
 209         void (*pcibios_fixup_sriov)(struct pci_dev *pdev);
 210         resource_size_t (*pcibios_iov_resource_alignment)(struct pci_dev *, int resno);
 211 #endif /* CONFIG_PCI_IOV */
 212
 213         /* Called to shutdown machine specific hardware not already controlled
 214          * by other drivers.
 215          */
 216         void (*machine_shutdown)(void);
 217
 218 #ifdef CONFIG_KEXEC
 219         void (*kexec_cpu_down)(int crash_shutdown, int secondary);
 220
 221         /* Called to do what every setup is needed on image and the
 222          * reboot code buffer. Returns 0 on success.
 223          * Provide your own (maybe dummy) implementation if your platform
 224          * claims to support kexec.
 225          */
 226         int (*machine_kexec_prepare)(struct kimage *image);
 227
 228         /* Called to perform the _real_ kexec.
 229          * Do NOT allocate memory or fail here. We are past the point of
 230          * no return.
 231          */
 232         void (*machine_kexec)(struct kimage *image);
 233 #endif /* CONFIG_KEXEC */
 234
 235 #ifdef CONFIG_SUSPEND
 236         /* These are called to disable and enable, respectively, IRQs when
 237          * entering a suspend state.  If NULL, then the generic versions
 238          * will be called.  The generic versions disable/enable the
 239          * decrementer along with interrupts.
 240          */
 241         void (*suspend_disable_irqs)(void);
 242         void (*suspend_enable_irqs)(void);
 243 #endif
 244         int (*suspend_disable_cpu)(void);
 245
 246 #ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
 247         ssize_t (*cpu_probe)(const char *, size_t);
 248         ssize_t (*cpu_release)(const char *, size_t);
 249 #endif
 250
 251 #ifdef CONFIG_ARCH_RANDOM
 252         int (*get_random_seed)(unsigned long *v);
 253 #endif
 254 };
 255
 256 extern void e500_idle(void);
 257 extern void power4_idle(void);
 258 extern void power7_idle(void);
 259 extern void ppc6xx_idle(void);
 260 extern void book3e_idle(void);
 261
 262 /*
 263  * ppc_md contains a copy of the machine description structure for the
 264  * current platform. machine_id contains the initial address where the
 265  * description was found during boot.
 266  */
 267 extern struct machdep_calls ppc_md;
 268 extern struct machdep_calls *machine_id;
 269
 270 #define __machine_desc __attribute__ ((__section__ (".machine.desc")))
 271
 272 #define define_machine(name)                                    \
 273         extern struct machdep_calls mach_##name;                \
 274         EXPORT_SYMBOL(mach_##name);                             \
 275         struct machdep_calls mach_##name __machine_desc =
 276
 277 #define machine_is(name) \
 278         ({ \
 279                 extern struct machdep_calls mach_##name \
 280                         __attribute__((weak));           \
 281                 machine_id == &mach_##name; \
 282         })
 283
 284 extern void probe_machine(void);
 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 static inline void log_error(char *buf, unsigned int err_type, int fatal)
 302 {
 303         if (ppc_md.log_error)
 304                 ppc_md.log_error(buf, err_type, fatal);
 305 }
 306
 307 #define __define_machine_initcall(mach, fn, id) \
 308         static int __init __machine_initcall_##mach##_##fn(void) { \
 309                 if (machine_is(mach)) return fn(); \
 310                 return 0; \
 311         } \
 312         __define_initcall(__machine_initcall_##mach##_##fn, id);
 313
 314 #define machine_early_initcall(mach, fn)        __define_machine_initcall(mach, fn, early)
 315 #define machine_core_initcall(mach, fn)         __define_machine_initcall(mach, fn, 1)
 316 #define machine_core_initcall_sync(mach, fn)    __define_machine_initcall(mach, fn, 1s)
 317 #define machine_postcore_initcall(mach, fn)     __define_machine_initcall(mach, fn, 2)
 318 #define machine_postcore_initcall_sync(mach, fn)        __define_machine_initcall(mach, fn, 2s)
 319 #define machine_arch_initcall(mach, fn)         __define_machine_initcall(mach, fn, 3)
 320 #define machine_arch_initcall_sync(mach, fn)    __define_machine_initcall(mach, fn, 3s)
 321 #define machine_subsys_initcall(mach, fn)       __define_machine_initcall(mach, fn, 4)
 322 #define machine_subsys_initcall_sync(mach, fn)  __define_machine_initcall(mach, fn, 4s)
 323 #define machine_fs_initcall(mach, fn)           __define_machine_initcall(mach, fn, 5)
 324 #define machine_fs_initcall_sync(mach, fn)      __define_machine_initcall(mach, fn, 5s)
 325 #define machine_rootfs_initcall(mach, fn)       __define_machine_initcall(mach, fn, rootfs)
 326 #define machine_device_initcall(mach, fn)       __define_machine_initcall(mach, fn, 6)
 327 #define machine_device_initcall_sync(mach, fn)  __define_machine_initcall(mach, fn, 6s)
 328 #define machine_late_initcall(mach, fn)         __define_machine_initcall(mach, fn, 7)
 329 #define machine_late_initcall_sync(mach, fn)    __define_machine_initcall(mach, fn, 7s)
 330
 331 #endif /* __KERNEL__ */
 332 #endif /* _ASM_POWERPC_MACHDEP_H */