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/config.h>
  13 #include <linux/seq_file.h>
  14 #include <linux/init.h>
  15 #include <linux/dma-mapping.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 #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         void            (*tce_flush)(struct iommu_table *tbl);
  86         void            (*iommu_dev_setup)(struct pci_dev *dev);
  87         void            (*iommu_bus_setup)(struct pci_bus *bus);
  88         void            (*irq_bus_setup)(struct pci_bus *bus);
  89 #endif /* CONFIG_PPC64 */
  90
  91         int             (*probe)(void);
  92         void            (*setup_arch)(void);
  93         void            (*init_early)(void);
  94         /* Optional, may be NULL. */
  95         void            (*show_cpuinfo)(struct seq_file *m);
  96         void            (*show_percpuinfo)(struct seq_file *m, int i);
  97
  98         void            (*init_IRQ)(void);
  99         int             (*get_irq)(struct pt_regs *);
 100 #ifdef CONFIG_KEXEC
 101         void            (*kexec_cpu_down)(int crash_shutdown, int secondary);
 102 #endif
 103
 104         /* PCI stuff */
 105         /* Called after scanning the bus, before allocating resources */
 106         void            (*pcibios_fixup)(void);
 107         int             (*pci_probe_mode)(struct pci_bus *);
 108
 109         void            (*restart)(char *cmd);
 110         void            (*power_off)(void);
 111         void            (*halt)(void);
 112         void            (*panic)(char *str);
 113         void            (*cpu_die)(void);
 114
 115         long            (*time_init)(void); /* Optional, may be NULL */
 116
 117         int             (*set_rtc_time)(struct rtc_time *);
 118         void            (*get_rtc_time)(struct rtc_time *);
 119         unsigned long   (*get_boot_time)(void);
 120         unsigned char   (*rtc_read_val)(int addr);
 121         void            (*rtc_write_val)(int addr, unsigned char val);
 122
 123         void            (*calibrate_decr)(void);
 124
 125         void            (*progress)(char *, unsigned short);
 126
 127         /* Interface for platform error logging */
 128         void            (*log_error)(char *buf, unsigned int err_type, int fatal);
 129
 130         unsigned char   (*nvram_read_val)(int addr);
 131         void            (*nvram_write_val)(int addr, unsigned char val);
 132         ssize_t         (*nvram_write)(char *buf, size_t count, loff_t *index);
 133         ssize_t         (*nvram_read)(char *buf, size_t count, loff_t *index);
 134         ssize_t         (*nvram_size)(void);
 135         void            (*nvram_sync)(void);
 136
 137         /* Exception handlers */
 138         int             (*system_reset_exception)(struct pt_regs *regs);
 139         int             (*machine_check_exception)(struct pt_regs *regs);
 140
 141         /* Motherboard/chipset features. This is a kind of general purpose
 142          * hook used to control some machine specific features (like reset
 143          * lines, chip power control, etc...).
 144          */
 145         long            (*feature_call)(unsigned int feature, ...);
 146
 147         /* Check availability of legacy devices like i8042 */
 148         int             (*check_legacy_ioport)(unsigned int baseport);
 149
 150         /* Get legacy PCI/IDE interrupt mapping */
 151         int             (*pci_get_legacy_ide_irq)(struct pci_dev *dev, int channel);
 152
 153         /* Get access protection for /dev/mem */
 154         pgprot_t        (*phys_mem_access_prot)(struct file *file,
 155                                                 unsigned long pfn,
 156                                                 unsigned long size,
 157                                                 pgprot_t vma_prot);
 158
 159         /* Idle loop for this platform, leave empty for default idle loop */
 160         void            (*idle_loop)(void);
 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
 175 #ifdef CONFIG_PPC32     /* XXX for now */
 176         /* A general init function, called by ppc_init in init/main.c.
 177            May be NULL. */
 178         void            (*init)(void);
 179
 180         void            (*setup_io_mappings)(void);
 181
 182         void            (*early_serial_map)(void);
 183         void            (*kgdb_map_scc)(void);
 184
 185         /*
 186          * optional PCI "hooks"
 187          */
 188
 189         /* Called after PPC generic resource fixup to perform
 190            machine specific fixups */
 191         void (*pcibios_fixup_resources)(struct pci_dev *);
 192
 193         /* Called for each PCI bus in the system when it's probed */
 194         void (*pcibios_fixup_bus)(struct pci_bus *);
 195
 196         /* Called when pci_enable_device() is called (initial=0) or
 197          * when a device with no assigned resource is found (initial=1).
 198          * Returns 0 to allow assignment/enabling of the device. */
 199         int  (*pcibios_enable_device_hook)(struct pci_dev *, int initial);
 200
 201         /* For interrupt routing */
 202         unsigned char (*pci_swizzle)(struct pci_dev *, unsigned char *);
 203         int (*pci_map_irq)(struct pci_dev *, unsigned char, unsigned char);
 204
 205         /* Called in indirect_* to avoid touching devices */
 206         int (*pci_exclude_device)(unsigned char, unsigned char);
 207
 208         /* Called at then very end of pcibios_init() */
 209         void (*pcibios_after_init)(void);
 210
 211 #endif /* CONFIG_PPC32 */
 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         /* Called to do the minimal shutdown needed to run a kexec'd kernel
 220          * to run successfully.
 221          * XXX Should we move this one out of kexec scope?
 222          */
 223         void (*machine_crash_shutdown)(struct pt_regs *regs);
 224
 225         /* Called to do what every setup is needed on image and the
 226          * reboot code buffer. Returns 0 on success.
 227          * Provide your own (maybe dummy) implementation if your platform
 228          * claims to support kexec.
 229          */
 230         int (*machine_kexec_prepare)(struct kimage *image);
 231
 232         /* Called to handle any machine specific cleanup on image */
 233         void (*machine_kexec_cleanup)(struct kimage *image);
 234
 235         /* Called to perform the _real_ kexec.
 236          * Do NOT allocate memory or fail here. We are past the point of
 237          * no return.
 238          */
 239         void (*machine_kexec)(struct kimage *image);
 240 #endif /* CONFIG_KEXEC */
 241 };
 242
 243 extern void power4_idle(void);
 244 extern void ppc6xx_idle(void);
 245
 246 /*
 247  * ppc_md contains a copy of the machine description structure for the
 248  * current platform. machine_id contains the initial address where the
 249  * description was found during boot.
 250  */
 251 extern struct machdep_calls ppc_md;
 252 extern struct machdep_calls *machine_id;
 253
 254 #define __machine_desc __attribute__ ((__section__ (".machine.desc")))
 255
 256 #define define_machine(name) struct machdep_calls mach_##name __machine_desc =
 257 #define machine_is(name) \
 258         ({ \
 259                 extern struct machdep_calls mach_##name \
 260                         __attribute__((weak));           \
 261                 machine_id == &mach_##name; \
 262         })
 263
 264 extern void probe_machine(void);
 265
 266 extern char cmd_line[COMMAND_LINE_SIZE];
 267
 268 #ifdef CONFIG_PPC_PMAC
 269 /*
 270  * Power macintoshes have either a CUDA, PMU or SMU controlling
 271  * system reset, power, NVRAM, RTC.
 272  */
 273 typedef enum sys_ctrler_kind {
 274         SYS_CTRLER_UNKNOWN = 0,
 275         SYS_CTRLER_CUDA = 1,
 276         SYS_CTRLER_PMU = 2,
 277         SYS_CTRLER_SMU = 3,
 278 } sys_ctrler_t;
 279 extern sys_ctrler_t sys_ctrler;
 280
 281 #endif /* CONFIG_PPC_PMAC */
 282
 283 extern void setup_pci_ptrs(void);
 284
 285 #ifdef CONFIG_SMP
 286 /* Poor default implementations */
 287 extern void __devinit smp_generic_give_timebase(void);
 288 extern void __devinit smp_generic_take_timebase(void);
 289 #endif /* CONFIG_SMP */
 290
 291
 292 /* Functions to produce codes on the leds.
 293  * The SRC code should be unique for the message category and should
 294  * be limited to the lower 24 bits (the upper 8 are set by these funcs),
 295  * and (for boot & dump) should be sorted numerically in the order
 296  * the events occur.
 297  */
 298 /* Print a boot progress message. */
 299 void ppc64_boot_msg(unsigned int src, const char *msg);
 300 /* Print a termination message (print only -- does not stop the kernel) */
 301 void ppc64_terminate_msg(unsigned int src, const char *msg);
 302
 303 static inline void log_error(char *buf, unsigned int err_type, int fatal)
 304 {
 305         if (ppc_md.log_error)
 306                 ppc_md.log_error(buf, err_type, fatal);
 307 }
 308
 309 #endif /* __KERNEL__ */
 310 #endif /* _ASM_POWERPC_MACHDEP_H */