include/asm-sparc64/oplib.h

   1 /* $Id: oplib.h,v 1.14 2001/12/19 00:29:51 davem Exp $
   2  * oplib.h:  Describes the interface and available routines in the
   3  *           Linux Prom library.
   4  *
   5  * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
   6  * Copyright (C) 1996 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
   7  */
   8
   9 #ifndef __SPARC64_OPLIB_H
  10 #define __SPARC64_OPLIB_H
  11
  12 #include <linux/config.h>
  13 #include <asm/openprom.h>
  14
  15 /* Enumeration to describe the prom major version we have detected. */
  16 enum prom_major_version {
  17         PROM_V0,      /* Original sun4c V0 prom */
  18         PROM_V2,      /* sun4c and early sun4m V2 prom */
  19         PROM_V3,      /* sun4m and later, up to sun4d/sun4e machines V3 */
  20         PROM_P1275,   /* IEEE compliant ISA based Sun PROM, only sun4u */
  21         PROM_AP1000,  /* actually no prom at all */
  22 };
  23
  24 extern enum prom_major_version prom_vers;
  25 /* Revision, and firmware revision. */
  26 extern unsigned int prom_rev, prom_prev;
  27
  28 /* Root node of the prom device tree, this stays constant after
  29  * initialization is complete.
  30  */
  31 extern int prom_root_node;
  32
  33 /* PROM stdin and stdout */
  34 extern int prom_stdin, prom_stdout;
  35
  36 /* /chosen node of the prom device tree, this stays constant after
  37  * initialization is complete.
  38  */
  39 extern int prom_chosen_node;
  40
  41 /* Helper values and strings in arch/sparc64/kernel/head.S */
  42 extern const char prom_finddev_name[];
  43 extern const char prom_chosen_path[];
  44 extern const char prom_getprop_name[];
  45 extern const char prom_mmu_name[];
  46 extern const char prom_callmethod_name[];
  47 extern const char prom_translate_name[];
  48 extern const char prom_map_name[];
  49 extern const char prom_unmap_name[];
  50 extern int prom_mmu_ihandle_cache;
  51 extern unsigned int prom_boot_mapped_pc;
  52 extern unsigned int prom_boot_mapping_mode;
  53 extern unsigned long prom_boot_mapping_phys_high, prom_boot_mapping_phys_low;
  54
  55 struct linux_mlist_p1275 {
  56         struct linux_mlist_p1275 *theres_more;
  57         unsigned long start_adr;
  58         unsigned long num_bytes;
  59 };
  60
  61 struct linux_mem_p1275 {
  62         struct linux_mlist_p1275 **p1275_totphys;
  63         struct linux_mlist_p1275 **p1275_prommap;
  64         struct linux_mlist_p1275 **p1275_available; /* What we can use */
  65 };
  66
  67 /* The functions... */
  68
  69 /* You must call prom_init() before using any of the library services,
  70  * preferably as early as possible.  Pass it the romvec pointer.
  71  */
  72 extern void prom_init(void *cif_handler, void *cif_stack);
  73
  74 /* Boot argument acquisition, returns the boot command line string. */
  75 extern char *prom_getbootargs(void);
  76
  77 /* Device utilities. */
  78
  79 /* Device operations. */
  80
  81 /* Open the device described by the passed string.  Note, that the format
  82  * of the string is different on V0 vs. V2->higher proms.  The caller must
  83  * know what he/she is doing!  Returns the device descriptor, an int.
  84  */
  85 extern int prom_devopen(const char *device_string);
  86
  87 /* Close a previously opened device described by the passed integer
  88  * descriptor.
  89  */
  90 extern int prom_devclose(int device_handle);
  91
  92 /* Do a seek operation on the device described by the passed integer
  93  * descriptor.
  94  */
  95 extern void prom_seek(int device_handle, unsigned int seek_hival,
  96                       unsigned int seek_lowval);
  97
  98 /* Miscellaneous routines, don't really fit in any category per se. */
  99
 100 /* Reboot the machine with the command line passed. */
 101 extern void prom_reboot(const char *boot_command);
 102
 103 /* Evaluate the forth string passed. */
 104 extern void prom_feval(const char *forth_string);
 105
 106 /* Enter the prom, with possibility of continuation with the 'go'
 107  * command in newer proms.
 108  */
 109 extern void prom_cmdline(void);
 110
 111 /* Enter the prom, with no chance of continuation for the stand-alone
 112  * which calls this.
 113  */
 114 extern void prom_halt(void) __attribute__ ((noreturn));
 115
 116 /* Halt and power-off the machine. */
 117 extern void prom_halt_power_off(void) __attribute__ ((noreturn));
 118
 119 /* Set the PROM 'sync' callback function to the passed function pointer.
 120  * When the user gives the 'sync' command at the prom prompt while the
 121  * kernel is still active, the prom will call this routine.
 122  *
 123  */
 124 typedef int (*callback_func_t)(long *cmd);
 125 extern void prom_setcallback(callback_func_t func_ptr);
 126
 127 /* Acquire the IDPROM of the root node in the prom device tree.  This
 128  * gets passed a buffer where you would like it stuffed.  The return value
 129  * is the format type of this idprom or 0xff on error.
 130  */
 131 extern unsigned char prom_get_idprom(char *idp_buffer, int idpbuf_size);
 132
 133 /* Get the prom major version. */
 134 extern int prom_version(void);
 135
 136 /* Get the prom plugin revision. */
 137 extern int prom_getrev(void);
 138
 139 /* Get the prom firmware revision. */
 140 extern int prom_getprev(void);
 141
 142 /* Character operations to/from the console.... */
 143
 144 /* Non-blocking get character from console. */
 145 extern int prom_nbgetchar(void);
 146
 147 /* Non-blocking put character to console. */
 148 extern int prom_nbputchar(char character);
 149
 150 /* Blocking get character from console. */
 151 extern char prom_getchar(void);
 152
 153 /* Blocking put character to console. */
 154 extern void prom_putchar(char character);
 155
 156 /* Prom's internal routines, don't use in kernel/boot code. */
 157 extern void prom_printf(const char *fmt, ...);
 158 extern void prom_write(const char *buf, unsigned int len);
 159
 160 /* Query for input device type */
 161
 162 enum prom_input_device {
 163         PROMDEV_IKBD,                   /* input from keyboard */
 164         PROMDEV_ITTYA,                  /* input from ttya */
 165         PROMDEV_ITTYB,                  /* input from ttyb */
 166         PROMDEV_IRSC,                   /* input from rsc */
 167         PROMDEV_I_UNK,
 168 };
 169
 170 extern enum prom_input_device prom_query_input_device(void);
 171
 172 /* Query for output device type */
 173
 174 enum prom_output_device {
 175         PROMDEV_OSCREEN,                /* to screen */
 176         PROMDEV_OTTYA,                  /* to ttya */
 177         PROMDEV_OTTYB,                  /* to ttyb */
 178         PROMDEV_ORSC,                   /* to rsc */
 179         PROMDEV_O_UNK,
 180 };
 181
 182 extern enum prom_output_device prom_query_output_device(void);
 183
 184 /* Multiprocessor operations... */
 185 #ifdef CONFIG_SMP
 186 /* Start the CPU with the given device tree node, context table, and context
 187  * at the passed program counter.
 188  */
 189 extern void prom_startcpu(int cpunode, unsigned long pc, unsigned long o0);
 190
 191 /* Stop the current CPU. */
 192 extern void prom_stopself(void);
 193
 194 /* Idle the current CPU. */
 195 extern void prom_idleself(void);
 196
 197 /* Resume the CPU with the passed device tree node. */
 198 extern void prom_resumecpu(int cpunode);
 199 #endif
 200
 201 /* Power management interfaces. */
 202
 203 /* Put the current CPU to sleep. */
 204 extern void prom_sleepself(void);
 205
 206 /* Put the entire system to sleep. */
 207 extern int prom_sleepsystem(void);
 208
 209 /* Initiate a wakeup event. */
 210 extern int prom_wakeupsystem(void);
 211
 212 /* MMU and memory related OBP interfaces. */
 213
 214 /* Get unique string identifying SIMM at given physical address. */
 215 extern int prom_getunumber(int syndrome_code,
 216                            unsigned long phys_addr,
 217                            char *buf, int buflen);
 218
 219 /* Retain physical memory to the caller across soft resets. */
 220 extern unsigned long prom_retain(const char *name,
 221                                  unsigned long pa_low, unsigned long pa_high,
 222                                  long size, long align);
 223
 224 /* Load explicit I/D TLB entries into the calling processor. */
 225 extern long prom_itlb_load(unsigned long index,
 226                            unsigned long tte_data,
 227                            unsigned long vaddr);
 228
 229 extern long prom_dtlb_load(unsigned long index,
 230                            unsigned long tte_data,
 231                            unsigned long vaddr);
 232
 233 /* Map/Unmap client program address ranges.  First the format of
 234  * the mapping mode argument.
 235  */
 236 #define PROM_MAP_WRITE  0x0001 /* Writable */
 237 #define PROM_MAP_READ   0x0002 /* Readable - sw */
 238 #define PROM_MAP_EXEC   0x0004 /* Executable - sw */
 239 #define PROM_MAP_LOCKED 0x0010 /* Locked, use i/dtlb load calls for this instead */
 240 #define PROM_MAP_CACHED 0x0020 /* Cacheable in both L1 and L2 caches */
 241 #define PROM_MAP_SE     0x0040 /* Side-Effects */
 242 #define PROM_MAP_GLOB   0x0080 /* Global */
 243 #define PROM_MAP_IE     0x0100 /* Invert-Endianness */
 244 #define PROM_MAP_DEFAULT (PROM_MAP_WRITE | PROM_MAP_READ | PROM_MAP_EXEC | PROM_MAP_CACHED)
 245
 246 extern int prom_map(int mode, unsigned long size,
 247                     unsigned long vaddr, unsigned long paddr);
 248 extern void prom_unmap(unsigned long size, unsigned long vaddr);
 249
 250
 251 /* PROM device tree traversal functions... */
 252
 253 #ifdef PROMLIB_INTERNAL
 254
 255 /* Internal version of prom_getchild. */
 256 extern int __prom_getchild(int parent_node);
 257
 258 /* Internal version of prom_getsibling. */
 259 extern int __prom_getsibling(int node);
 260
 261 #endif
 262
 263 /* Get the child node of the given node, or zero if no child exists. */
 264 extern int prom_getchild(int parent_node);
 265
 266 /* Get the next sibling node of the given node, or zero if no further
 267  * siblings exist.
 268  */
 269 extern int prom_getsibling(int node);
 270
 271 /* Get the length, at the passed node, of the given property type.
 272  * Returns -1 on error (ie. no such property at this node).
 273  */
 274 extern int prom_getproplen(int thisnode, const char *property);
 275
 276 /* Fetch the requested property using the given buffer.  Returns
 277  * the number of bytes the prom put into your buffer or -1 on error.
 278  */
 279 extern int prom_getproperty(int thisnode, const char *property,
 280                             char *prop_buffer, int propbuf_size);
 281
 282 /* Acquire an integer property. */
 283 extern int prom_getint(int node, const char *property);
 284
 285 /* Acquire an integer property, with a default value. */
 286 extern int prom_getintdefault(int node, const char *property, int defval);
 287
 288 /* Acquire a boolean property, 0=FALSE 1=TRUE. */
 289 extern int prom_getbool(int node, const char *prop);
 290
 291 /* Acquire a string property, null string on error. */
 292 extern void prom_getstring(int node, const char *prop, char *buf, int bufsize);
 293
 294 /* Does the passed node have the given "name"? YES=1 NO=0 */
 295 extern int prom_nodematch(int thisnode, const char *name);
 296
 297 /* Puts in buffer a prom name in the form name@x,y or name (x for which_io
 298  * and y for first regs phys address
 299  */
 300 extern int prom_getname(int node, char *buf, int buflen);
 301
 302 /* Search all siblings starting at the passed node for "name" matching
 303  * the given string.  Returns the node on success, zero on failure.
 304  */
 305 extern int prom_searchsiblings(int node_start, const char *name);
 306
 307 /* Return the first property type, as a string, for the given node.
 308  * Returns a null string on error. Buffer should be at least 32B long.
 309  */
 310 extern char *prom_firstprop(int node, char *buffer);
 311
 312 /* Returns the next property after the passed property for the given
 313  * node.  Returns null string on failure. Buffer should be at least 32B long.
 314  */
 315 extern char *prom_nextprop(int node, const char *prev_property, char *buffer);
 316
 317 /* Returns 1 if the specified node has given property. */
 318 extern int prom_node_has_property(int node, const char *property);
 319
 320 /* Returns phandle of the path specified */
 321 extern int prom_finddevice(const char *name);
 322
 323 /* Set the indicated property at the given node with the passed value.
 324  * Returns the number of bytes of your value that the prom took.
 325  */
 326 extern int prom_setprop(int node, const char *prop_name, char *prop_value,
 327                         int value_size);
 328
 329 extern int prom_pathtoinode(const char *path);
 330 extern int prom_inst2pkg(int);
 331
 332 /* CPU probing helpers.  */
 333 int cpu_find_by_instance(int instance, int *prom_node, int *mid);
 334 int cpu_find_by_mid(int mid, int *prom_node);
 335
 336 /* Client interface level routines. */
 337 extern void prom_set_trap_table(unsigned long tba);
 338
 339 extern long p1275_cmd(const char *, long, ...);
 340
 341
 342 #if 0
 343 #define P1275_SIZE(x) ((((long)((x) / 32)) << 32) | (x))
 344 #else
 345 #define P1275_SIZE(x) x
 346 #endif
 347
 348 /* We support at most 16 input and 1 output argument */
 349 #define P1275_ARG_NUMBER                0
 350 #define P1275_ARG_IN_STRING             1
 351 #define P1275_ARG_OUT_BUF               2
 352 #define P1275_ARG_OUT_32B               3
 353 #define P1275_ARG_IN_FUNCTION           4
 354 #define P1275_ARG_IN_BUF                5
 355 #define P1275_ARG_IN_64B                6
 356
 357 #define P1275_IN(x) ((x) & 0xf)
 358 #define P1275_OUT(x) (((x) << 4) & 0xf0)
 359 #define P1275_INOUT(i,o) (P1275_IN(i)|P1275_OUT(o))
 360 #define P1275_ARG(n,x) ((x) << ((n)*3 + 8))
 361
 362 #endif /* !(__SPARC64_OPLIB_H) */