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 struct linux_mlist_p1275 {
  42         struct linux_mlist_p1275 *theres_more;
  43         unsigned long start_adr;
  44         unsigned long num_bytes;
  45 };
  46
  47 struct linux_mem_p1275 {
  48         struct linux_mlist_p1275 **p1275_totphys;
  49         struct linux_mlist_p1275 **p1275_prommap;
  50         struct linux_mlist_p1275 **p1275_available; /* What we can use */
  51 };
  52
  53 /* The functions... */
  54
  55 /* You must call prom_init() before using any of the library services,
  56  * preferably as early as possible.  Pass it the romvec pointer.
  57  */
  58 extern void prom_init(void *cif_handler, void *cif_stack);
  59
  60 /* Boot argument acquisition, returns the boot command line string. */
  61 extern char *prom_getbootargs(void);
  62
  63 /* Device utilities. */
  64
  65 /* Device operations. */
  66
  67 /* Open the device described by the passed string.  Note, that the format
  68  * of the string is different on V0 vs. V2->higher proms.  The caller must
  69  * know what he/she is doing!  Returns the device descriptor, an int.
  70  */
  71 extern int prom_devopen(char *device_string);
  72
  73 /* Close a previously opened device described by the passed integer
  74  * descriptor.
  75  */
  76 extern int prom_devclose(int device_handle);
  77
  78 /* Do a seek operation on the device described by the passed integer
  79  * descriptor.
  80  */
  81 extern void prom_seek(int device_handle, unsigned int seek_hival,
  82                       unsigned int seek_lowval);
  83
  84 /* Machine memory configuration routine. */
  85
  86 /* This function returns a V0 format memory descriptor table, it has three
  87  * entries.  One for the total amount of physical ram on the machine, one
  88  * for the amount of physical ram available, and one describing the virtual
  89  * areas which are allocated by the prom.  So, in a sense the physical
  90  * available is a calculation of the total physical minus the physical mapped
  91  * by the prom with virtual mappings.
  92  *
  93  * These lists are returned pre-sorted, this should make your life easier
  94  * since the prom itself is way too lazy to do such nice things.
  95  */
  96 extern struct linux_mem_p1275 *prom_meminfo(void);
  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(char *boot_command);
 102
 103 /* Evaluate the forth string passed. */
 104 extern void prom_feval(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(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_I_UNK,
 167 };
 168
 169 extern enum prom_input_device prom_query_input_device(void);
 170
 171 /* Query for output device type */
 172
 173 enum prom_output_device {
 174         PROMDEV_OSCREEN,                /* to screen */
 175         PROMDEV_OTTYA,                  /* to ttya */
 176         PROMDEV_OTTYB,                  /* to ttyb */
 177         PROMDEV_O_UNK,
 178 };
 179
 180 extern enum prom_output_device prom_query_output_device(void);
 181
 182 /* Multiprocessor operations... */
 183 #ifdef CONFIG_SMP
 184 /* Start the CPU with the given device tree node, context table, and context
 185  * at the passed program counter.
 186  */
 187 extern void prom_startcpu(int cpunode, unsigned long pc, unsigned long o0);
 188
 189 /* Stop the current CPU. */
 190 extern void prom_stopself(void);
 191
 192 /* Idle the current CPU. */
 193 extern void prom_idleself(void);
 194
 195 /* Resume the CPU with the passed device tree node. */
 196 extern void prom_resumecpu(int cpunode);
 197 #endif
 198
 199 /* Power management interfaces. */
 200
 201 /* Put the current CPU to sleep. */
 202 extern void prom_sleepself(void);
 203
 204 /* Put the entire system to sleep. */
 205 extern int prom_sleepsystem(void);
 206
 207 /* Initiate a wakeup event. */
 208 extern int prom_wakeupsystem(void);
 209
 210 /* MMU and memory related OBP interfaces. */
 211
 212 /* Get unique string identifying SIMM at given physical address. */
 213 extern int prom_getunumber(int syndrome_code,
 214                            unsigned long phys_addr,
 215                            char *buf, int buflen);
 216
 217 /* Retain physical memory to the caller across soft resets. */
 218 extern unsigned long prom_retain(char *name,
 219                                  unsigned long pa_low, unsigned long pa_high,
 220                                  long size, long align);
 221
 222 /* Load explicit I/D TLB entries into the calling processor. */
 223 extern long prom_itlb_load(unsigned long index,
 224                            unsigned long tte_data,
 225                            unsigned long vaddr);
 226
 227 extern long prom_dtlb_load(unsigned long index,
 228                            unsigned long tte_data,
 229                            unsigned long vaddr);
 230
 231 /* Map/Unmap client program address ranges.  First the format of
 232  * the mapping mode argument.
 233  */
 234 #define PROM_MAP_WRITE  0x0001 /* Writable */
 235 #define PROM_MAP_READ   0x0002 /* Readable - sw */
 236 #define PROM_MAP_EXEC   0x0004 /* Executable - sw */
 237 #define PROM_MAP_LOCKED 0x0010 /* Locked, use i/dtlb load calls for this instead */
 238 #define PROM_MAP_CACHED 0x0020 /* Cacheable in both L1 and L2 caches */
 239 #define PROM_MAP_SE     0x0040 /* Side-Effects */
 240 #define PROM_MAP_GLOB   0x0080 /* Global */
 241 #define PROM_MAP_IE     0x0100 /* Invert-Endianness */
 242 #define PROM_MAP_DEFAULT (PROM_MAP_WRITE | PROM_MAP_READ | PROM_MAP_EXEC | PROM_MAP_CACHED)
 243
 244 extern int prom_map(int mode, unsigned long size,
 245                     unsigned long vaddr, unsigned long paddr);
 246 extern void prom_unmap(unsigned long size, unsigned long vaddr);
 247
 248
 249 /* PROM device tree traversal functions... */
 250
 251 #ifdef PROMLIB_INTERNAL
 252
 253 /* Internal version of prom_getchild. */
 254 extern int __prom_getchild(int parent_node);
 255
 256 /* Internal version of prom_getsibling. */
 257 extern int __prom_getsibling(int node);
 258
 259 #endif
 260
 261 /* Get the child node of the given node, or zero if no child exists. */
 262 extern int prom_getchild(int parent_node);
 263
 264 /* Get the next sibling node of the given node, or zero if no further
 265  * siblings exist.
 266  */
 267 extern int prom_getsibling(int node);
 268
 269 /* Get the length, at the passed node, of the given property type.
 270  * Returns -1 on error (ie. no such property at this node).
 271  */
 272 extern int prom_getproplen(int thisnode, char *property);
 273
 274 /* Fetch the requested property using the given buffer.  Returns
 275  * the number of bytes the prom put into your buffer or -1 on error.
 276  */
 277 extern int prom_getproperty(int thisnode, char *property,
 278                             char *prop_buffer, int propbuf_size);
 279
 280 /* Acquire an integer property. */
 281 extern int prom_getint(int node, char *property);
 282
 283 /* Acquire an integer property, with a default value. */
 284 extern int prom_getintdefault(int node, char *property, int defval);
 285
 286 /* Acquire a boolean property, 0=FALSE 1=TRUE. */
 287 extern int prom_getbool(int node, char *prop);
 288
 289 /* Acquire a string property, null string on error. */
 290 extern void prom_getstring(int node, char *prop, char *buf, int bufsize);
 291
 292 /* Does the passed node have the given "name"? YES=1 NO=0 */
 293 extern int prom_nodematch(int thisnode, char *name);
 294
 295 /* Puts in buffer a prom name in the form name@x,y or name (x for which_io
 296  * and y for first regs phys address
 297  */
 298 extern int prom_getname(int node, char *buf, int buflen);
 299
 300 /* Search all siblings starting at the passed node for "name" matching
 301  * the given string.  Returns the node on success, zero on failure.
 302  */
 303 extern int prom_searchsiblings(int node_start, char *name);
 304
 305 /* Return the first property type, as a string, for the given node.
 306  * Returns a null string on error. Buffer should be at least 32B long.
 307  */
 308 extern char *prom_firstprop(int node, char *buffer);
 309
 310 /* Returns the next property after the passed property for the given
 311  * node.  Returns null string on failure. Buffer should be at least 32B long.
 312  */
 313 extern char *prom_nextprop(int node, char *prev_property, char *buffer);
 314
 315 /* Returns 1 if the specified node has given property. */
 316 extern int prom_node_has_property(int node, char *property);
 317
 318 /* Returns phandle of the path specified */
 319 extern int prom_finddevice(char *name);
 320
 321 /* Set the indicated property at the given node with the passed value.
 322  * Returns the number of bytes of your value that the prom took.
 323  */
 324 extern int prom_setprop(int node, char *prop_name, char *prop_value,
 325                         int value_size);
 326
 327 extern int prom_pathtoinode(char *path);
 328 extern int prom_inst2pkg(int);
 329
 330 /* CPU probing helpers.  */
 331 int cpu_find_by_instance(int instance, int *prom_node, int *mid);
 332 int cpu_find_by_mid(int mid, int *prom_node);
 333
 334 /* Client interface level routines. */
 335 extern void prom_set_trap_table(unsigned long tba);
 336
 337 extern long p1275_cmd (char *, long, ...);
 338
 339
 340 #if 0
 341 #define P1275_SIZE(x) ((((long)((x) / 32)) << 32) | (x))
 342 #else
 343 #define P1275_SIZE(x) x
 344 #endif
 345
 346 /* We support at most 16 input and 1 output argument */
 347 #define P1275_ARG_NUMBER                0
 348 #define P1275_ARG_IN_STRING             1
 349 #define P1275_ARG_OUT_BUF               2
 350 #define P1275_ARG_OUT_32B               3
 351 #define P1275_ARG_IN_FUNCTION           4
 352 #define P1275_ARG_IN_BUF                5
 353 #define P1275_ARG_IN_64B                6
 354
 355 #define P1275_IN(x) ((x) & 0xf)
 356 #define P1275_OUT(x) (((x) << 4) & 0xf0)
 357 #define P1275_INOUT(i,o) (P1275_IN(i)|P1275_OUT(o))
 358 #define P1275_ARG(n,x) ((x) << ((n)*3 + 8))
 359
 360 #endif /* !(__SPARC64_OPLIB_H) */