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         unsigned long   (*tce_get)(struct iommu_table *tbl,
  85                                     long index);
  86         void            (*tce_flush)(struct iommu_table *tbl);
  87         void            (*iommu_dev_setup)(struct pci_dev *dev);
  88         void            (*iommu_bus_setup)(struct pci_bus *bus);
  89         void            (*irq_bus_setup)(struct pci_bus *bus);
  90 #endif /* CONFIG_PPC64 */
  91
  92         int             (*probe)(void);
  93         void            (*setup_arch)(void);
  94         void            (*init_early)(void);
  95         /* Optional, may be NULL. */
  96         void            (*show_cpuinfo)(struct seq_file *m);
  97         void            (*show_percpuinfo)(struct seq_file *m, int i);
  98
  99         void            (*init_IRQ)(void);
 100         unsigned int    (*get_irq)(struct pt_regs *);
 101 #ifdef CONFIG_KEXEC
 102         void            (*kexec_cpu_down)(int crash_shutdown, int secondary);
 103 #endif
 104
 105         /* PCI stuff */
 106         /* Called after scanning the bus, before allocating resources */
 107         void            (*pcibios_fixup)(void);
 108         int             (*pci_probe_mode)(struct pci_bus *);
 109
 110         void            (*restart)(char *cmd);
 111         void            (*power_off)(void);
 112         void            (*halt)(void);
 113         void            (*panic)(char *str);
 114         void            (*cpu_die)(void);
 115
 116         long            (*time_init)(void); /* Optional, may be NULL */
 117
 118         int             (*set_rtc_time)(struct rtc_time *);
 119         void            (*get_rtc_time)(struct rtc_time *);
 120         unsigned long   (*get_boot_time)(void);
 121         unsigned char   (*rtc_read_val)(int addr);
 122         void            (*rtc_write_val)(int addr, unsigned char val);
 123
 124         void            (*calibrate_decr)(void);
 125
 126         void            (*progress)(char *, unsigned short);
 127
 128         /* Interface for platform error logging */
 129         void            (*log_error)(char *buf, unsigned int err_type, int fatal);
 130
 131         unsigned char   (*nvram_read_val)(int addr);
 132         void            (*nvram_write_val)(int addr, unsigned char val);
 133         ssize_t         (*nvram_write)(char *buf, size_t count, loff_t *index);
 134         ssize_t         (*nvram_read)(char *buf, size_t count, loff_t *index);
 135         ssize_t         (*nvram_size)(void);
 136         void            (*nvram_sync)(void);
 137
 138         /* Exception handlers */
 139         int             (*system_reset_exception)(struct pt_regs *regs);
 140         int             (*machine_check_exception)(struct pt_regs *regs);
 141
 142         /* Motherboard/chipset features. This is a kind of general purpose
 143          * hook used to control some machine specific features (like reset
 144          * lines, chip power control, etc...).
 145          */
 146         long            (*feature_call)(unsigned int feature, ...);
 147
 148         /* Check availability of legacy devices like i8042 */
 149         int             (*check_legacy_ioport)(unsigned int baseport);
 150
 151         /* Get legacy PCI/IDE interrupt mapping */
 152         int             (*pci_get_legacy_ide_irq)(struct pci_dev *dev, int channel);
 153
 154         /* Get access protection for /dev/mem */
 155         pgprot_t        (*phys_mem_access_prot)(struct file *file,
 156                                                 unsigned long pfn,
 157                                                 unsigned long size,
 158                                                 pgprot_t vma_prot);
 159
 160         /* Idle loop for this platform, leave empty for default idle loop */
 161         void            (*idle_loop)(void);
 162
 163         /*
 164          * Function for waiting for work with reduced power in idle loop;
 165          * called with interrupts disabled.
 166          */
 167         void            (*power_save)(void);
 168
 169         /* Function to enable performance monitor counters for this
 170            platform, called once per cpu. */
 171         void            (*enable_pmcs)(void);
 172
 173         /* Set DABR for this platform, leave empty for default implemenation */
 174         int             (*set_dabr)(unsigned long dabr);
 175
 176 #ifdef CONFIG_PPC32     /* XXX for now */
 177         /* A general init function, called by ppc_init in init/main.c.
 178            May be NULL. */
 179         void            (*init)(void);
 180
 181         void            (*setup_io_mappings)(void);
 182
 183         void            (*early_serial_map)(void);
 184         void            (*kgdb_map_scc)(void);
 185
 186         /*
 187          * optional PCI "hooks"
 188          */
 189
 190         /* Called after PPC generic resource fixup to perform
 191            machine specific fixups */
 192         void (*pcibios_fixup_resources)(struct pci_dev *);
 193
 194         /* Called for each PCI bus in the system when it's probed */
 195         void (*pcibios_fixup_bus)(struct pci_bus *);
 196
 197         /* Called when pci_enable_device() is called (initial=0) or
 198          * when a device with no assigned resource is found (initial=1).
 199          * Returns 0 to allow assignment/enabling of the device. */
 200         int  (*pcibios_enable_device_hook)(struct pci_dev *, int initial);
 201
 202         /* For interrupt routing */
 203         unsigned char (*pci_swizzle)(struct pci_dev *, unsigned char *);
 204         int (*pci_map_irq)(struct pci_dev *, unsigned char, unsigned char);
 205
 206         /* Called in indirect_* to avoid touching devices */
 207         int (*pci_exclude_device)(unsigned char, unsigned char);
 208
 209         /* Called at then very end of pcibios_init() */
 210         void (*pcibios_after_init)(void);
 211
 212 #endif /* CONFIG_PPC32 */
 213
 214         /* Called to shutdown machine specific hardware not already controlled
 215          * by other drivers.
 216          */
 217         void (*machine_shutdown)(void);
 218
 219 #ifdef CONFIG_KEXEC
 220         /* Called to do the minimal shutdown needed to run a kexec'd kernel
 221          * to run successfully.
 222          * XXX Should we move this one out of kexec scope?
 223          */
 224         void (*machine_crash_shutdown)(struct pt_regs *regs);
 225
 226         /* Called to do what every setup is needed on image and the
 227          * reboot code buffer. Returns 0 on success.
 228          * Provide your own (maybe dummy) implementation if your platform
 229          * claims to support kexec.
 230          */
 231         int (*machine_kexec_prepare)(struct kimage *image);
 232
 233         /* Called to handle any machine specific cleanup on image */
 234         void (*machine_kexec_cleanup)(struct kimage *image);
 235
 236         /* Called to perform the _real_ kexec.
 237          * Do NOT allocate memory or fail here. We are past the point of
 238          * no return.
 239          */
 240         void (*machine_kexec)(struct kimage *image);
 241 #endif /* CONFIG_KEXEC */
 242
 243 #ifdef CONFIG_PCI_MSI
 244         int (*enable_msi)(struct pci_dev *pdev);
 245         void (*disable_msi)(struct pci_dev *pdev);
 246 #endif /* CONFIG_PCI_MSI */
 247 };
 248
 249 extern void power4_idle(void);
 250 extern void ppc6xx_idle(void);
 251
 252 /*
 253  * ppc_md contains a copy of the machine description structure for the
 254  * current platform. machine_id contains the initial address where the
 255  * description was found during boot.
 256  */
 257 extern struct machdep_calls ppc_md;
 258 extern struct machdep_calls *machine_id;
 259
 260 #define __machine_desc __attribute__ ((__section__ (".machine.desc")))
 261
 262 #define define_machine(name)                                    \
 263         extern struct machdep_calls mach_##name;                \
 264         EXPORT_SYMBOL(mach_##name);                             \
 265         struct machdep_calls mach_##name __machine_desc =
 266
 267 #define machine_is(name) \
 268         ({ \
 269                 extern struct machdep_calls mach_##name \
 270                         __attribute__((weak));           \
 271                 machine_id == &mach_##name; \
 272         })
 273
 274 extern void probe_machine(void);
 275
 276 extern char cmd_line[COMMAND_LINE_SIZE];
 277
 278 #ifdef CONFIG_PPC_PMAC
 279 /*
 280  * Power macintoshes have either a CUDA, PMU or SMU controlling
 281  * system reset, power, NVRAM, RTC.
 282  */
 283 typedef enum sys_ctrler_kind {
 284         SYS_CTRLER_UNKNOWN = 0,
 285         SYS_CTRLER_CUDA = 1,
 286         SYS_CTRLER_PMU = 2,
 287         SYS_CTRLER_SMU = 3,
 288 } sys_ctrler_t;
 289 extern sys_ctrler_t sys_ctrler;
 290
 291 #endif /* CONFIG_PPC_PMAC */
 292
 293 extern void setup_pci_ptrs(void);
 294
 295 #ifdef CONFIG_SMP
 296 /* Poor default implementations */
 297 extern void __devinit smp_generic_give_timebase(void);
 298 extern void __devinit smp_generic_take_timebase(void);
 299 #endif /* CONFIG_SMP */
 300
 301
 302 /* Functions to produce codes on the leds.
 303  * The SRC code should be unique for the message category and should
 304  * be limited to the lower 24 bits (the upper 8 are set by these funcs),
 305  * and (for boot & dump) should be sorted numerically in the order
 306  * the events occur.
 307  */
 308 /* Print a boot progress message. */
 309 void ppc64_boot_msg(unsigned int src, const char *msg);
 310 /* Print a termination message (print only -- does not stop the kernel) */
 311 void ppc64_terminate_msg(unsigned int src, const char *msg);
 312
 313 static inline void log_error(char *buf, unsigned int err_type, int fatal)
 314 {
 315         if (ppc_md.log_error)
 316                 ppc_md.log_error(buf, err_type, fatal);
 317 }
 318
 319 #endif /* __KERNEL__ */
 320 #endif /* _ASM_POWERPC_MACHDEP_H */