include/asm-powerpc/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
  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
  23 struct pt_regs;
  24 struct pci_bus;
  25 struct device_node;
  26 struct iommu_table;
  27 struct rtc_time;
  28 struct file;
  29 #ifdef CONFIG_KEXEC
  30 struct kimage;
  31 #endif
  32
  33 #ifdef CONFIG_SMP
  34 struct smp_ops_t {
  35         void  (*message_pass)(int target, int msg);
  36         int   (*probe)(void);
  37         void  (*kick_cpu)(int nr);
  38         void  (*setup_cpu)(int nr);
  39         void  (*take_timebase)(void);
  40         void  (*give_timebase)(void);
  41         int   (*cpu_enable)(unsigned int nr);
  42         int   (*cpu_disable)(void);
  43         void  (*cpu_die)(unsigned int nr);
  44         int   (*cpu_bootable)(unsigned int nr);
  45 };
  46 #endif
  47
  48 struct machdep_calls {
  49         char            *name;
  50 #ifdef CONFIG_PPC64
  51         void            (*hpte_invalidate)(unsigned long slot,
  52                                            unsigned long va,
  53                                            int psize,
  54                                            int local);
  55         long            (*hpte_updatepp)(unsigned long slot,
  56                                          unsigned long newpp,
  57                                          unsigned long va,
  58                                          int pize,
  59                                          int local);
  60         void            (*hpte_updateboltedpp)(unsigned long newpp,
  61                                                unsigned long ea,
  62                                                int psize);
  63         long            (*hpte_insert)(unsigned long hpte_group,
  64                                        unsigned long va,
  65                                        unsigned long prpn,
  66                                        unsigned long rflags,
  67                                        unsigned long vflags,
  68                                        int psize);
  69         long            (*hpte_remove)(unsigned long hpte_group);
  70         void            (*flush_hash_range)(unsigned long number, int local);
  71
  72         /* special for kexec, to be called in real mode, linar mapping is
  73          * destroyed as well */
  74         void            (*hpte_clear_all)(void);
  75
  76         void            (*tce_build)(struct iommu_table * tbl,
  77                                      long index,
  78                                      long npages,
  79                                      unsigned long uaddr,
  80                                      enum dma_data_direction direction);
  81         void            (*tce_free)(struct iommu_table *tbl,
  82                                     long index,
  83                                     long npages);
  84         void            (*tce_flush)(struct iommu_table *tbl);
  85         void            (*iommu_dev_setup)(struct pci_dev *dev);
  86         void            (*iommu_bus_setup)(struct pci_bus *bus);
  87         void            (*irq_bus_setup)(struct pci_bus *bus);
  88 #endif /* CONFIG_PPC64 */
  89
  90         int             (*probe)(void);
  91         void            (*setup_arch)(void);
  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
  97         void            (*init_IRQ)(void);
  98         int             (*get_irq)(struct pt_regs *);
  99 #ifdef CONFIG_KEXEC
 100         void            (*kexec_cpu_down)(int crash_shutdown, int secondary);
 101 #endif
 102
 103         /* PCI stuff */
 104         /* Called after scanning the bus, before allocating resources */
 105         void            (*pcibios_fixup)(void);
 106         int             (*pci_probe_mode)(struct pci_bus *);
 107
 108         void            (*restart)(char *cmd);
 109         void            (*power_off)(void);
 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
 140         /* Motherboard/chipset features. This is a kind of general purpose
 141          * hook used to control some machine specific features (like reset
 142          * lines, chip power control, etc...).
 143          */
 144         long            (*feature_call)(unsigned int feature, ...);
 145
 146         /* Check availability of legacy devices like i8042 */
 147         int             (*check_legacy_ioport)(unsigned int baseport);
 148
 149         /* Get legacy PCI/IDE interrupt mapping */
 150         int             (*pci_get_legacy_ide_irq)(struct pci_dev *dev, int channel);
 151
 152         /* Get access protection for /dev/mem */
 153         pgprot_t        (*phys_mem_access_prot)(struct file *file,
 154                                                 unsigned long pfn,
 155                                                 unsigned long size,
 156                                                 pgprot_t vma_prot);
 157
 158         /* Idle loop for this platform, leave empty for default idle loop */
 159         void            (*idle_loop)(void);
 160
 161         /*
 162          * Function for waiting for work with reduced power in idle loop;
 163          * called with interrupts disabled.
 164          */
 165         void            (*power_save)(void);
 166
 167         /* Function to enable performance monitor counters for this
 168            platform, called once per cpu. */
 169         void            (*enable_pmcs)(void);
 170
 171         /* Set DABR for this platform, leave empty for default implemenation */
 172         int             (*set_dabr)(unsigned long dabr);
 173
 174 #ifdef CONFIG_PPC32     /* XXX for now */
 175         /* A general init function, called by ppc_init in init/main.c.
 176            May be NULL. */
 177         void            (*init)(void);
 178
 179         void            (*setup_io_mappings)(void);
 180
 181         void            (*early_serial_map)(void);
 182         void            (*kgdb_map_scc)(void);
 183
 184         /*
 185          * optional PCI "hooks"
 186          */
 187
 188         /* Called after PPC generic resource fixup to perform
 189            machine specific fixups */
 190         void (*pcibios_fixup_resources)(struct pci_dev *);
 191
 192         /* Called for each PCI bus in the system when it's probed */
 193         void (*pcibios_fixup_bus)(struct pci_bus *);
 194
 195         /* Called when pci_enable_device() is called (initial=0) or
 196          * when a device with no assigned resource is found (initial=1).
 197          * Returns 0 to allow assignment/enabling of the device. */
 198         int  (*pcibios_enable_device_hook)(struct pci_dev *, int initial);
 199
 200         /* For interrupt routing */
 201         unsigned char (*pci_swizzle)(struct pci_dev *, unsigned char *);
 202         int (*pci_map_irq)(struct pci_dev *, unsigned char, unsigned char);
 203
 204         /* Called in indirect_* to avoid touching devices */
 205         int (*pci_exclude_device)(unsigned char, unsigned char);
 206
 207         /* Called at then very end of pcibios_init() */
 208         void (*pcibios_after_init)(void);
 209
 210 #endif /* CONFIG_PPC32 */
 211
 212         /* Called to shutdown machine specific hardware not already controlled
 213          * by other drivers.
 214          */
 215         void (*machine_shutdown)(void);
 216
 217 #ifdef CONFIG_KEXEC
 218         /* Called to do the minimal shutdown needed to run a kexec'd kernel
 219          * to run successfully.
 220          * XXX Should we move this one out of kexec scope?
 221          */
 222         void (*machine_crash_shutdown)(struct pt_regs *regs);
 223
 224         /* Called to do what every setup is needed on image and the
 225          * reboot code buffer. Returns 0 on success.
 226          * Provide your own (maybe dummy) implementation if your platform
 227          * claims to support kexec.
 228          */
 229         int (*machine_kexec_prepare)(struct kimage *image);
 230
 231         /* Called to handle any machine specific cleanup on image */
 232         void (*machine_kexec_cleanup)(struct kimage *image);
 233
 234         /* Called to perform the _real_ kexec.
 235          * Do NOT allocate memory or fail here. We are past the point of
 236          * no return.
 237          */
 238         void (*machine_kexec)(struct kimage *image);
 239 #endif /* CONFIG_KEXEC */
 240
 241 #ifdef CONFIG_PCI_MSI
 242         int (*enable_msi)(struct pci_dev *pdev);
 243         void (*disable_msi)(struct pci_dev *pdev);
 244 #endif /* CONFIG_PCI_MSI */
 245 };
 246
 247 extern void power4_idle(void);
 248 extern void ppc6xx_idle(void);
 249
 250 /*
 251  * ppc_md contains a copy of the machine description structure for the
 252  * current platform. machine_id contains the initial address where the
 253  * description was found during boot.
 254  */
 255 extern struct machdep_calls ppc_md;
 256 extern struct machdep_calls *machine_id;
 257
 258 #define __machine_desc __attribute__ ((__section__ (".machine.desc")))
 259
 260 #define define_machine(name)                                    \
 261         extern struct machdep_calls mach_##name;                \
 262         EXPORT_SYMBOL(mach_##name);                             \
 263         struct machdep_calls mach_##name __machine_desc =
 264
 265 #define machine_is(name) \
 266         ({ \
 267                 extern struct machdep_calls mach_##name \
 268                         __attribute__((weak));           \
 269                 machine_id == &mach_##name; \
 270         })
 271
 272 extern void probe_machine(void);
 273
 274 extern char cmd_line[COMMAND_LINE_SIZE];
 275
 276 #ifdef CONFIG_PPC_PMAC
 277 /*
 278  * Power macintoshes have either a CUDA, PMU or SMU controlling
 279  * system reset, power, NVRAM, RTC.
 280  */
 281 typedef enum sys_ctrler_kind {
 282         SYS_CTRLER_UNKNOWN = 0,
 283         SYS_CTRLER_CUDA = 1,
 284         SYS_CTRLER_PMU = 2,
 285         SYS_CTRLER_SMU = 3,
 286 } sys_ctrler_t;
 287 extern sys_ctrler_t sys_ctrler;
 288
 289 #endif /* CONFIG_PPC_PMAC */
 290
 291 extern void setup_pci_ptrs(void);
 292
 293 #ifdef CONFIG_SMP
 294 /* Poor default implementations */
 295 extern void __devinit smp_generic_give_timebase(void);
 296 extern void __devinit smp_generic_take_timebase(void);
 297 #endif /* CONFIG_SMP */
 298
 299
 300 /* Functions to produce codes on the leds.
 301  * The SRC code should be unique for the message category and should
 302  * be limited to the lower 24 bits (the upper 8 are set by these funcs),
 303  * and (for boot & dump) should be sorted numerically in the order
 304  * the events occur.
 305  */
 306 /* Print a boot progress message. */
 307 void ppc64_boot_msg(unsigned int src, const char *msg);
 308 /* Print a termination message (print only -- does not stop the kernel) */
 309 void ppc64_terminate_msg(unsigned int src, const char *msg);
 310
 311 static inline void log_error(char *buf, unsigned int err_type, int fatal)
 312 {
 313         if (ppc_md.log_error)
 314                 ppc_md.log_error(buf, err_type, fatal);
 315 }
 316
 317 #endif /* __KERNEL__ */
 318 #endif /* _ASM_POWERPC_MACHDEP_H */