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