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 struct pci_controller;
  30 #ifdef CONFIG_KEXEC
  31 struct kimage;
  32 #endif
  33
  34 #ifdef CONFIG_SMP
  35 struct smp_ops_t {
  36         void  (*message_pass)(int target, int msg);
  37         int   (*probe)(void);
  38         void  (*kick_cpu)(int nr);
  39         void  (*setup_cpu)(int nr);
  40         void  (*take_timebase)(void);
  41         void  (*give_timebase)(void);
  42         int   (*cpu_enable)(unsigned int nr);
  43         int   (*cpu_disable)(void);
  44         void  (*cpu_die)(unsigned int nr);
  45         int   (*cpu_bootable)(unsigned int nr);
  46 };
  47 #endif
  48
  49 struct machdep_calls {
  50         char            *name;
  51 #ifdef CONFIG_PPC64
  52         void            (*hpte_invalidate)(unsigned long slot,
  53                                            unsigned long va,
  54                                            int psize,
  55                                            int local);
  56         long            (*hpte_updatepp)(unsigned long slot,
  57                                          unsigned long newpp,
  58                                          unsigned long va,
  59                                          int pize,
  60                                          int local);
  61         void            (*hpte_updateboltedpp)(unsigned long newpp,
  62                                                unsigned long ea,
  63                                                int psize);
  64         long            (*hpte_insert)(unsigned long hpte_group,
  65                                        unsigned long va,
  66                                        unsigned long prpn,
  67                                        unsigned long rflags,
  68                                        unsigned long vflags,
  69                                        int psize);
  70         long            (*hpte_remove)(unsigned long hpte_group);
  71         void            (*flush_hash_range)(unsigned long number, int local);
  72
  73         /* special for kexec, to be called in real mode, linar mapping is
  74          * destroyed as well */
  75         void            (*hpte_clear_all)(void);
  76
  77         void            (*tce_build)(struct iommu_table * tbl,
  78                                      long index,
  79                                      long npages,
  80                                      unsigned long uaddr,
  81                                      enum dma_data_direction direction);
  82         void            (*tce_free)(struct iommu_table *tbl,
  83                                     long index,
  84                                     long npages);
  85         unsigned long   (*tce_get)(struct iommu_table *tbl,
  86                                     long index);
  87         void            (*tce_flush)(struct iommu_table *tbl);
  88         void            (*pci_dma_dev_setup)(struct pci_dev *dev);
  89         void            (*pci_dma_bus_setup)(struct pci_bus *bus);
  90
  91         void __iomem *  (*ioremap)(phys_addr_t addr, unsigned long size,
  92                                    unsigned long flags);
  93         void            (*iounmap)(volatile void __iomem *token);
  94 #endif /* CONFIG_PPC64 */
  95
  96         int             (*probe)(void);
  97         void            (*setup_arch)(void);
  98         void            (*init_early)(void);
  99         /* Optional, may be NULL. */
 100         void            (*show_cpuinfo)(struct seq_file *m);
 101         void            (*show_percpuinfo)(struct seq_file *m, int i);
 102
 103         void            (*init_IRQ)(void);
 104         unsigned int    (*get_irq)(void);
 105 #ifdef CONFIG_KEXEC
 106         void            (*kexec_cpu_down)(int crash_shutdown, int secondary);
 107 #endif
 108
 109         /* PCI stuff */
 110         /* Called after scanning the bus, before allocating resources */
 111         void            (*pcibios_fixup)(void);
 112         int             (*pci_probe_mode)(struct pci_bus *);
 113         void            (*pci_irq_fixup)(struct pci_dev *dev);
 114
 115         /* To setup PHBs when using automatic OF platform driver for PCI */
 116         int             (*pci_setup_phb)(struct pci_controller *host);
 117
 118         void            (*restart)(char *cmd);
 119         void            (*power_off)(void);
 120         void            (*halt)(void);
 121         void            (*panic)(char *str);
 122         void            (*cpu_die)(void);
 123
 124         long            (*time_init)(void); /* Optional, may be NULL */
 125
 126         int             (*set_rtc_time)(struct rtc_time *);
 127         void            (*get_rtc_time)(struct rtc_time *);
 128         unsigned long   (*get_boot_time)(void);
 129         unsigned char   (*rtc_read_val)(int addr);
 130         void            (*rtc_write_val)(int addr, unsigned char val);
 131
 132         void            (*calibrate_decr)(void);
 133
 134         void            (*progress)(char *, unsigned short);
 135
 136         /* Interface for platform error logging */
 137         void            (*log_error)(char *buf, unsigned int err_type, int fatal);
 138
 139         unsigned char   (*nvram_read_val)(int addr);
 140         void            (*nvram_write_val)(int addr, unsigned char val);
 141         ssize_t         (*nvram_write)(char *buf, size_t count, loff_t *index);
 142         ssize_t         (*nvram_read)(char *buf, size_t count, loff_t *index);
 143         ssize_t         (*nvram_size)(void);
 144         void            (*nvram_sync)(void);
 145
 146         /* Exception handlers */
 147         int             (*system_reset_exception)(struct pt_regs *regs);
 148         int             (*machine_check_exception)(struct pt_regs *regs);
 149
 150         /* Motherboard/chipset features. This is a kind of general purpose
 151          * hook used to control some machine specific features (like reset
 152          * lines, chip power control, etc...).
 153          */
 154         long            (*feature_call)(unsigned int feature, ...);
 155
 156         /* Get legacy PCI/IDE interrupt mapping */
 157         int             (*pci_get_legacy_ide_irq)(struct pci_dev *dev, int channel);
 158
 159         /* Get access protection for /dev/mem */
 160         pgprot_t        (*phys_mem_access_prot)(struct file *file,
 161                                                 unsigned long pfn,
 162                                                 unsigned long size,
 163                                                 pgprot_t vma_prot);
 164
 165         /* Idle loop for this platform, leave empty for default idle loop */
 166         void            (*idle_loop)(void);
 167
 168         /*
 169          * Function for waiting for work with reduced power in idle loop;
 170          * called with interrupts disabled.
 171          */
 172         void            (*power_save)(void);
 173
 174         /* Function to enable performance monitor counters for this
 175            platform, called once per cpu. */
 176         void            (*enable_pmcs)(void);
 177
 178         /* Set DABR for this platform, leave empty for default implemenation */
 179         int             (*set_dabr)(unsigned long dabr);
 180
 181 #ifdef CONFIG_PPC32     /* XXX for now */
 182         /* A general init function, called by ppc_init in init/main.c.
 183            May be NULL. */
 184         void            (*init)(void);
 185
 186         void            (*setup_io_mappings)(void);
 187
 188         void            (*early_serial_map)(void);
 189         void            (*kgdb_map_scc)(void);
 190
 191         /*
 192          * optional PCI "hooks"
 193          */
 194
 195         /* Called after PPC generic resource fixup to perform
 196            machine specific fixups */
 197         void (*pcibios_fixup_resources)(struct pci_dev *);
 198
 199         /* Called for each PCI bus in the system when it's probed */
 200         void (*pcibios_fixup_bus)(struct pci_bus *);
 201
 202         /* Called when pci_enable_device() is called (initial=0) or
 203          * when a device with no assigned resource is found (initial=1).
 204          * Returns 0 to allow assignment/enabling of the device. */
 205         int  (*pcibios_enable_device_hook)(struct pci_dev *, int initial);
 206
 207         /* Called in indirect_* to avoid touching devices */
 208         int (*pci_exclude_device)(unsigned char, unsigned char);
 209
 210         /* Called at then very end of pcibios_init() */
 211         void (*pcibios_after_init)(void);
 212
 213 #endif /* CONFIG_PPC32 */
 214
 215         /* Called to shutdown machine specific hardware not already controlled
 216          * by other drivers.
 217          */
 218         void (*machine_shutdown)(void);
 219
 220 #ifdef CONFIG_KEXEC
 221         /* Called to do the minimal shutdown needed to run a kexec'd kernel
 222          * to run successfully.
 223          * XXX Should we move this one out of kexec scope?
 224          */
 225         void (*machine_crash_shutdown)(struct pt_regs *regs);
 226
 227         /* Called to do what every setup is needed on image and the
 228          * reboot code buffer. Returns 0 on success.
 229          * Provide your own (maybe dummy) implementation if your platform
 230          * claims to support kexec.
 231          */
 232         int (*machine_kexec_prepare)(struct kimage *image);
 233
 234         /* Called to handle any machine specific cleanup on image */
 235         void (*machine_kexec_cleanup)(struct kimage *image);
 236
 237         /* Called to perform the _real_ kexec.
 238          * Do NOT allocate memory or fail here. We are past the point of
 239          * no return.
 240          */
 241         void (*machine_kexec)(struct kimage *image);
 242 #endif /* CONFIG_KEXEC */
 243
 244 #ifdef CONFIG_PCI_MSI
 245         int (*enable_msi)(struct pci_dev *pdev);
 246         void (*disable_msi)(struct pci_dev *pdev);
 247 #endif /* CONFIG_PCI_MSI */
 248 };
 249
 250 extern void power4_idle(void);
 251 extern void ppc6xx_idle(void);
 252
 253 /*
 254  * ppc_md contains a copy of the machine description structure for the
 255  * current platform. machine_id contains the initial address where the
 256  * description was found during boot.
 257  */
 258 extern struct machdep_calls ppc_md;
 259 extern struct machdep_calls *machine_id;
 260
 261 #define __machine_desc __attribute__ ((__section__ (".machine.desc")))
 262
 263 #define define_machine(name)                                    \
 264         extern struct machdep_calls mach_##name;                \
 265         EXPORT_SYMBOL(mach_##name);                             \
 266         struct machdep_calls mach_##name __machine_desc =
 267
 268 #define machine_is(name) \
 269         ({ \
 270                 extern struct machdep_calls mach_##name \
 271                         __attribute__((weak));           \
 272                 machine_id == &mach_##name; \
 273         })
 274
 275 extern void probe_machine(void);
 276
 277 extern char cmd_line[COMMAND_LINE_SIZE];
 278
 279 #ifdef CONFIG_PPC_PMAC
 280 /*
 281  * Power macintoshes have either a CUDA, PMU or SMU controlling
 282  * system reset, power, NVRAM, RTC.
 283  */
 284 typedef enum sys_ctrler_kind {
 285         SYS_CTRLER_UNKNOWN = 0,
 286         SYS_CTRLER_CUDA = 1,
 287         SYS_CTRLER_PMU = 2,
 288         SYS_CTRLER_SMU = 3,
 289 } sys_ctrler_t;
 290 extern sys_ctrler_t sys_ctrler;
 291
 292 #endif /* CONFIG_PPC_PMAC */
 293
 294 extern void setup_pci_ptrs(void);
 295
 296 #ifdef CONFIG_SMP
 297 /* Poor default implementations */
 298 extern void __devinit smp_generic_give_timebase(void);
 299 extern void __devinit smp_generic_take_timebase(void);
 300 #endif /* CONFIG_SMP */
 301
 302
 303 /* Functions to produce codes on the leds.
 304  * The SRC code should be unique for the message category and should
 305  * be limited to the lower 24 bits (the upper 8 are set by these funcs),
 306  * and (for boot & dump) should be sorted numerically in the order
 307  * the events occur.
 308  */
 309 /* Print a boot progress message. */
 310 void ppc64_boot_msg(unsigned int src, const char *msg);
 311 /* Print a termination message (print only -- does not stop the kernel) */
 312 void ppc64_terminate_msg(unsigned int src, const char *msg);
 313
 314 static inline void log_error(char *buf, unsigned int err_type, int fatal)
 315 {
 316         if (ppc_md.log_error)
 317                 ppc_md.log_error(buf, err_type, fatal);
 318 }
 319
 320 #endif /* __KERNEL__ */
 321 #endif /* _ASM_POWERPC_MACHDEP_H */