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 __iomem *  (*ioremap)(phys_addr_t addr, unsigned long size,
  38                                    unsigned long flags, void *caller);
  39         void            (*iounmap)(volatile void __iomem *token);
  40
  41 #ifdef CONFIG_PM
  42         void            (*iommu_save)(void);
  43         void            (*iommu_restore)(void);
  44 #endif
  45 #ifdef CONFIG_MEMORY_HOTPLUG_SPARSE
  46         unsigned long   (*memory_block_size)(void);
  47 #endif
  48 #endif /* CONFIG_PPC64 */
  49
  50         /* Platform set_dma_mask and dma_get_required_mask overrides */
  51         int             (*dma_set_mask)(struct device *dev, u64 dma_mask);
  52         u64             (*dma_get_required_mask)(struct device *dev);
  53
  54         int             (*probe)(void);
  55         void            (*setup_arch)(void); /* Optional, may be NULL */
  56         /* Optional, may be NULL. */
  57         void            (*show_cpuinfo)(struct seq_file *m);
  58         void            (*show_percpuinfo)(struct seq_file *m, int i);
  59         /* Returns the current operating frequency of "cpu" in Hz */
  60         unsigned long   (*get_proc_freq)(unsigned int cpu);
  61
  62         void            (*init_IRQ)(void);
  63
  64         /* Return an irq, or 0 to indicate there are none pending. */
  65         unsigned int    (*get_irq)(void);
  66
  67         /* PCI stuff */
  68         /* Called after allocating resources */
  69         void            (*pcibios_fixup)(void);
  70         void            (*pci_irq_fixup)(struct pci_dev *dev);
  71         int             (*pcibios_root_bridge_prepare)(struct pci_host_bridge
  72                                 *bridge);
  73
  74         /* To setup PHBs when using automatic OF platform driver for PCI */
  75         int             (*pci_setup_phb)(struct pci_controller *host);
  76
  77         void __noreturn (*restart)(char *cmd);
  78         void __noreturn (*halt)(void);
  79         void            (*cpu_die)(void);
  80
  81         long            (*time_init)(void); /* Optional, may be NULL */
  82
  83         int             (*set_rtc_time)(struct rtc_time *);
  84         void            (*get_rtc_time)(struct rtc_time *);
  85         unsigned long   (*get_boot_time)(void);
  86         unsigned char   (*rtc_read_val)(int addr);
  87         void            (*rtc_write_val)(int addr, unsigned char val);
  88
  89         void            (*calibrate_decr)(void);
  90
  91         void            (*progress)(char *, unsigned short);
  92
  93         /* Interface for platform error logging */
  94         void            (*log_error)(char *buf, unsigned int err_type, int fatal);
  95
  96         unsigned char   (*nvram_read_val)(int addr);
  97         void            (*nvram_write_val)(int addr, unsigned char val);
  98         ssize_t         (*nvram_write)(char *buf, size_t count, loff_t *index);
  99         ssize_t         (*nvram_read)(char *buf, size_t count, loff_t *index);
 100         ssize_t         (*nvram_size)(void);
 101         void            (*nvram_sync)(void);
 102
 103         /* Exception handlers */
 104         int             (*system_reset_exception)(struct pt_regs *regs);
 105         int             (*machine_check_exception)(struct pt_regs *regs);
 106         int             (*handle_hmi_exception)(struct pt_regs *regs);
 107
 108         /* Early exception handlers called in realmode */
 109         int             (*hmi_exception_early)(struct pt_regs *regs);
 110
 111         /* Called during machine check exception to retrive fixup address. */
 112         bool            (*mce_check_early_recovery)(struct pt_regs *regs);
 113
 114         /* Motherboard/chipset features. This is a kind of general purpose
 115          * hook used to control some machine specific features (like reset
 116          * lines, chip power control, etc...).
 117          */
 118         long            (*feature_call)(unsigned int feature, ...);
 119
 120         /* Get legacy PCI/IDE interrupt mapping */
 121         int             (*pci_get_legacy_ide_irq)(struct pci_dev *dev, int channel);
 122
 123         /* Get access protection for /dev/mem */
 124         pgprot_t        (*phys_mem_access_prot)(struct file *file,
 125                                                 unsigned long pfn,
 126                                                 unsigned long size,
 127                                                 pgprot_t vma_prot);
 128
 129         /*
 130          * Function for waiting for work with reduced power in idle loop;
 131          * called with interrupts disabled.
 132          */
 133         void            (*power_save)(void);
 134
 135         /* Function to enable performance monitor counters for this
 136            platform, called once per cpu. */
 137         void            (*enable_pmcs)(void);
 138
 139         /* Set DABR for this platform, leave empty for default implementation */
 140         int             (*set_dabr)(unsigned long dabr,
 141                                     unsigned long dabrx);
 142
 143         /* Set DAWR for this platform, leave empty for default implementation */
 144         int             (*set_dawr)(unsigned long dawr,
 145                                     unsigned long dawrx);
 146
 147 #ifdef CONFIG_PPC32     /* XXX for now */
 148         /* A general init function, called by ppc_init in init/main.c.
 149            May be NULL. */
 150         void            (*init)(void);
 151
 152         void            (*kgdb_map_scc)(void);
 153
 154         /*
 155          * optional PCI "hooks"
 156          */
 157         /* Called at then very end of pcibios_init() */
 158         void (*pcibios_after_init)(void);
 159
 160 #endif /* CONFIG_PPC32 */
 161
 162         /* Called in indirect_* to avoid touching devices */
 163         int (*pci_exclude_device)(struct pci_controller *, unsigned char, unsigned char);
 164
 165         /* Called after PPC generic resource fixup to perform
 166            machine specific fixups */
 167         void (*pcibios_fixup_resources)(struct pci_dev *);
 168
 169         /* Called for each PCI bus in the system when it's probed */
 170         void (*pcibios_fixup_bus)(struct pci_bus *);
 171
 172         /* Called after scan and before resource survey */
 173         void (*pcibios_fixup_phb)(struct pci_controller *hose);
 174
 175         resource_size_t (*pcibios_default_alignment)(void);
 176
 177 #ifdef CONFIG_PCI_IOV
 178         void (*pcibios_fixup_sriov)(struct pci_dev *pdev);
 179         resource_size_t (*pcibios_iov_resource_alignment)(struct pci_dev *, int resno);
 180 #endif /* CONFIG_PCI_IOV */
 181
 182         /* Called to shutdown machine specific hardware not already controlled
 183          * by other drivers.
 184          */
 185         void (*machine_shutdown)(void);
 186
 187 #ifdef CONFIG_KEXEC_CORE
 188         void (*kexec_cpu_down)(int crash_shutdown, int secondary);
 189
 190         /* Called to do what every setup is needed on image and the
 191          * reboot code buffer. Returns 0 on success.
 192          * Provide your own (maybe dummy) implementation if your platform
 193          * claims to support kexec.
 194          */
 195         int (*machine_kexec_prepare)(struct kimage *image);
 196
 197         /* Called to perform the _real_ kexec.
 198          * Do NOT allocate memory or fail here. We are past the point of
 199          * no return.
 200          */
 201         void (*machine_kexec)(struct kimage *image);
 202 #endif /* CONFIG_KEXEC_CORE */
 203
 204 #ifdef CONFIG_SUSPEND
 205         /* These are called to disable and enable, respectively, IRQs when
 206          * entering a suspend state.  If NULL, then the generic versions
 207          * will be called.  The generic versions disable/enable the
 208          * decrementer along with interrupts.
 209          */
 210         void (*suspend_disable_irqs)(void);
 211         void (*suspend_enable_irqs)(void);
 212 #endif
 213         int (*suspend_disable_cpu)(void);
 214
 215 #ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
 216         ssize_t (*cpu_probe)(const char *, size_t);
 217         ssize_t (*cpu_release)(const char *, size_t);
 218 #endif
 219
 220 #ifdef CONFIG_ARCH_RANDOM
 221         int (*get_random_seed)(unsigned long *v);
 222 #endif
 223 };
 224
 225 extern void e500_idle(void);
 226 extern void power4_idle(void);
 227 extern void power7_idle(void);
 228 extern void power9_idle(void);
 229 extern void ppc6xx_idle(void);
 230 extern void book3e_idle(void);
 231
 232 /*
 233  * ppc_md contains a copy of the machine description structure for the
 234  * current platform. machine_id contains the initial address where the
 235  * description was found during boot.
 236  */
 237 extern struct machdep_calls ppc_md;
 238 extern struct machdep_calls *machine_id;
 239
 240 #define __machine_desc __attribute__ ((__section__ (".machine.desc")))
 241
 242 #define define_machine(name)                                    \
 243         extern struct machdep_calls mach_##name;                \
 244         EXPORT_SYMBOL(mach_##name);                             \
 245         struct machdep_calls mach_##name __machine_desc =
 246
 247 #define machine_is(name) \
 248         ({ \
 249                 extern struct machdep_calls mach_##name \
 250                         __attribute__((weak));           \
 251                 machine_id == &mach_##name; \
 252         })
 253
 254 extern void probe_machine(void);
 255
 256 #ifdef CONFIG_PPC_PMAC
 257 /*
 258  * Power macintoshes have either a CUDA, PMU or SMU controlling
 259  * system reset, power, NVRAM, RTC.
 260  */
 261 typedef enum sys_ctrler_kind {
 262         SYS_CTRLER_UNKNOWN = 0,
 263         SYS_CTRLER_CUDA = 1,
 264         SYS_CTRLER_PMU = 2,
 265         SYS_CTRLER_SMU = 3,
 266 } sys_ctrler_t;
 267 extern sys_ctrler_t sys_ctrler;
 268
 269 #endif /* CONFIG_PPC_PMAC */
 270
 271 static inline void log_error(char *buf, unsigned int err_type, int fatal)
 272 {
 273         if (ppc_md.log_error)
 274                 ppc_md.log_error(buf, err_type, fatal);
 275 }
 276
 277 #define __define_machine_initcall(mach, fn, id) \
 278         static int __init __machine_initcall_##mach##_##fn(void) { \
 279                 if (machine_is(mach)) return fn(); \
 280                 return 0; \
 281         } \
 282         __define_initcall(__machine_initcall_##mach##_##fn, id);
 283
 284 #define machine_early_initcall(mach, fn)        __define_machine_initcall(mach, fn, early)
 285 #define machine_core_initcall(mach, fn)         __define_machine_initcall(mach, fn, 1)
 286 #define machine_core_initcall_sync(mach, fn)    __define_machine_initcall(mach, fn, 1s)
 287 #define machine_postcore_initcall(mach, fn)     __define_machine_initcall(mach, fn, 2)
 288 #define machine_postcore_initcall_sync(mach, fn)        __define_machine_initcall(mach, fn, 2s)
 289 #define machine_arch_initcall(mach, fn)         __define_machine_initcall(mach, fn, 3)
 290 #define machine_arch_initcall_sync(mach, fn)    __define_machine_initcall(mach, fn, 3s)
 291 #define machine_subsys_initcall(mach, fn)       __define_machine_initcall(mach, fn, 4)
 292 #define machine_subsys_initcall_sync(mach, fn)  __define_machine_initcall(mach, fn, 4s)
 293 #define machine_fs_initcall(mach, fn)           __define_machine_initcall(mach, fn, 5)
 294 #define machine_fs_initcall_sync(mach, fn)      __define_machine_initcall(mach, fn, 5s)
 295 #define machine_rootfs_initcall(mach, fn)       __define_machine_initcall(mach, fn, rootfs)
 296 #define machine_device_initcall(mach, fn)       __define_machine_initcall(mach, fn, 6)
 297 #define machine_device_initcall_sync(mach, fn)  __define_machine_initcall(mach, fn, 6s)
 298 #define machine_late_initcall(mach, fn)         __define_machine_initcall(mach, fn, 7)
 299 #define machine_late_initcall_sync(mach, fn)    __define_machine_initcall(mach, fn, 7s)
 300
 301 #endif /* __KERNEL__ */
 302 #endif /* _ASM_POWERPC_MACHDEP_H */