include/asm-m68k/oplib.h

   1 /* $Id: oplib.h,v 1.12 1996/10/31 06:29:13 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  */
   7
   8 #ifndef __SPARC_OPLIB_H
   9 #define __SPARC_OPLIB_H
  10
  11 #include <asm/openprom.h>
  12
  13 /* The master romvec pointer... */
  14 extern struct linux_romvec *romvec;
  15
  16 /* Enumeration to describe the prom major version we have detected. */
  17 enum prom_major_version {
  18         PROM_V0,      /* Original sun4c V0 prom */
  19         PROM_V2,      /* sun4c and early sun4m V2 prom */
  20         PROM_V3,      /* sun4m and later, up to sun4d/sun4e machines V3 */
  21         PROM_P1275,   /* IEEE compliant ISA based Sun PROM, only sun4u */
  22         PROM_AP1000,  /* actually no prom at all */
  23 };
  24
  25 extern enum prom_major_version prom_vers;
  26 /* Revision, and firmware revision. */
  27 extern unsigned int prom_rev, prom_prev;
  28
  29 /* Root node of the prom device tree, this stays constant after
  30  * initialization is complete.
  31  */
  32 extern int prom_root_node;
  33
  34 /* Pointer to prom structure containing the device tree traversal
  35  * and usage utility functions.  Only prom-lib should use these,
  36  * users use the interface defined by the library only!
  37  */
  38 extern struct linux_nodeops *prom_nodeops;
  39
  40 /* The functions... */
  41
  42 /* You must call prom_init() before using any of the library services,
  43  * preferably as early as possible.  Pass it the romvec pointer.
  44  */
  45 extern void prom_init(struct linux_romvec *rom_ptr);
  46
  47 /* Boot argument acquisition, returns the boot command line string. */
  48 extern char *prom_getbootargs(void);
  49
  50 /* Device utilities. */
  51
  52 /* Map and unmap devices in IO space at virtual addresses. Note that the
  53  * virtual address you pass is a request and the prom may put your mappings
  54  * somewhere else, so check your return value as that is where your new
  55  * mappings really are!
  56  *
  57  * Another note, these are only available on V2 or higher proms!
  58  */
  59 extern char *prom_mapio(char *virt_hint, int io_space, unsigned int phys_addr, unsigned int num_bytes);
  60 extern void prom_unmapio(char *virt_addr, unsigned int num_bytes);
  61
  62 /* Device operations. */
  63
  64 /* Open the device described by the passed string.  Note, that the format
  65  * of the string is different on V0 vs. V2->higher proms.  The caller must
  66  * know what he/she is doing!  Returns the device descriptor, an int.
  67  */
  68 extern int prom_devopen(char *device_string);
  69
  70 /* Close a previously opened device described by the passed integer
  71  * descriptor.
  72  */
  73 extern int prom_devclose(int device_handle);
  74
  75 /* Do a seek operation on the device described by the passed integer
  76  * descriptor.
  77  */
  78 extern void prom_seek(int device_handle, unsigned int seek_hival,
  79                       unsigned int seek_lowval);
  80
  81 /* Machine memory configuration routine. */
  82
  83 /* This function returns a V0 format memory descriptor table, it has three
  84  * entries.  One for the total amount of physical ram on the machine, one
  85  * for the amount of physical ram available, and one describing the virtual
  86  * areas which are allocated by the prom.  So, in a sense the physical
  87  * available is a calculation of the total physical minus the physical mapped
  88  * by the prom with virtual mappings.
  89  *
  90  * These lists are returned pre-sorted, this should make your life easier
  91  * since the prom itself is way too lazy to do such nice things.
  92  */
  93 extern struct linux_mem_v0 *prom_meminfo(void);
  94
  95 /* Miscellaneous routines, don't really fit in any category per se. */
  96
  97 /* Reboot the machine with the command line passed. */
  98 extern void prom_reboot(char *boot_command);
  99
 100 /* Evaluate the forth string passed. */
 101 extern void prom_feval(char *forth_string);
 102
 103 /* Enter the prom, with possibility of continuation with the 'go'
 104  * command in newer proms.
 105  */
 106 extern void prom_cmdline(void);
 107
 108 /* Enter the prom, with no chance of continuation for the stand-alone
 109  * which calls this.
 110  */
 111 extern void prom_halt(void);
 112
 113 /* Set the PROM 'sync' callback function to the passed function pointer.
 114  * When the user gives the 'sync' command at the prom prompt while the
 115  * kernel is still active, the prom will call this routine.
 116  *
 117  * XXX The arguments are different on V0 vs. V2->higher proms, grrr! XXX
 118  */
 119 typedef void (*sync_func_t)(void);
 120 extern void prom_setsync(sync_func_t func_ptr);
 121
 122 /* Acquire the IDPROM of the root node in the prom device tree.  This
 123  * gets passed a buffer where you would like it stuffed.  The return value
 124  * is the format type of this idprom or 0xff on error.
 125  */
 126 extern unsigned char prom_get_idprom(char *idp_buffer, int idpbuf_size);
 127
 128 /* Get the prom major version. */
 129 extern int prom_version(void);
 130
 131 /* Get the prom plugin revision. */
 132 extern int prom_getrev(void);
 133
 134 /* Get the prom firmware revision. */
 135 extern int prom_getprev(void);
 136
 137 /* Character operations to/from the console.... */
 138
 139 /* Non-blocking get character from console. */
 140 extern int prom_nbgetchar(void);
 141
 142 /* Non-blocking put character to console. */
 143 extern int prom_nbputchar(char character);
 144
 145 /* Blocking get character from console. */
 146 extern char prom_getchar(void);
 147
 148 /* Blocking put character to console. */
 149 extern void prom_putchar(char character);
 150
 151 /* Prom's internal printf routine, don't use in kernel/boot code. */
 152 void prom_printf(char *fmt, ...);
 153
 154 /* Query for input device type */
 155
 156 enum prom_input_device {
 157         PROMDEV_IKBD,                   /* input from keyboard */
 158         PROMDEV_ITTYA,                  /* input from ttya */
 159         PROMDEV_ITTYB,                  /* input from ttyb */
 160         PROMDEV_I_UNK,
 161 };
 162
 163 extern enum prom_input_device prom_query_input_device(void);
 164
 165 /* Query for output device type */
 166
 167 enum prom_output_device {
 168         PROMDEV_OSCREEN,                /* to screen */
 169         PROMDEV_OTTYA,                  /* to ttya */
 170         PROMDEV_OTTYB,                  /* to ttyb */
 171         PROMDEV_O_UNK,
 172 };
 173
 174 extern enum prom_output_device prom_query_output_device(void);
 175
 176 /* Multiprocessor operations... */
 177
 178 /* Start the CPU with the given device tree node, context table, and context
 179  * at the passed program counter.
 180  */
 181 extern int prom_startcpu(int cpunode, struct linux_prom_registers *context_table,
 182                          int context, char *program_counter);
 183
 184 /* Stop the CPU with the passed device tree node. */
 185 extern int prom_stopcpu(int cpunode);
 186
 187 /* Idle the CPU with the passed device tree node. */
 188 extern int prom_idlecpu(int cpunode);
 189
 190 /* Re-Start the CPU with the passed device tree node. */
 191 extern int prom_restartcpu(int cpunode);
 192
 193 /* PROM memory allocation facilities... */
 194
 195 /* Allocated at possibly the given virtual address a chunk of the
 196  * indicated size.
 197  */
 198 extern char *prom_alloc(char *virt_hint, unsigned int size);
 199
 200 /* Free a previously allocated chunk. */
 201 extern void prom_free(char *virt_addr, unsigned int size);
 202
 203 /* Sun4/sun4c specific memory-management startup hook. */
 204
 205 /* Map the passed segment in the given context at the passed
 206  * virtual address.
 207  */
 208 extern void prom_putsegment(int context, unsigned long virt_addr,
 209                             int physical_segment);
 210
 211 /* PROM device tree traversal functions... */
 212
 213 /* Get the child node of the given node, or zero if no child exists. */
 214 extern int prom_getchild(int parent_node);
 215
 216 /* Get the next sibling node of the given node, or zero if no further
 217  * siblings exist.
 218  */
 219 extern int prom_getsibling(int node);
 220
 221 /* Get the length, at the passed node, of the given property type.
 222  * Returns -1 on error (ie. no such property at this node).
 223  */
 224 extern int prom_getproplen(int thisnode, char *property);
 225
 226 /* Fetch the requested property using the given buffer.  Returns
 227  * the number of bytes the prom put into your buffer or -1 on error.
 228  */
 229 extern int prom_getproperty(int thisnode, char *property,
 230                             char *prop_buffer, int propbuf_size);
 231
 232 /* Acquire an integer property. */
 233 extern int prom_getint(int node, char *property);
 234
 235 /* Acquire an integer property, with a default value. */
 236 extern int prom_getintdefault(int node, char *property, int defval);
 237
 238 /* Acquire a boolean property, 0=FALSE 1=TRUE. */
 239 extern int prom_getbool(int node, char *prop);
 240
 241 /* Acquire a string property, null string on error. */
 242 extern void prom_getstring(int node, char *prop, char *buf, int bufsize);
 243
 244 /* Does the passed node have the given "name"? YES=1 NO=0 */
 245 extern int prom_nodematch(int thisnode, char *name);
 246
 247 /* Search all siblings starting at the passed node for "name" matching
 248  * the given string.  Returns the node on success, zero on failure.
 249  */
 250 extern int prom_searchsiblings(int node_start, char *name);
 251
 252 /* Return the first property type, as a string, for the given node.
 253  * Returns a null string on error.
 254  */
 255 extern char *prom_firstprop(int node);
 256
 257 /* Returns the next property after the passed property for the given
 258  * node.  Returns null string on failure.
 259  */
 260 extern char *prom_nextprop(int node, char *prev_property);
 261
 262 /* Returns 1 if the specified node has given property. */
 263 extern int prom_node_has_property(int node, char *property);
 264
 265 /* Set the indicated property at the given node with the passed value.
 266  * Returns the number of bytes of your value that the prom took.
 267  */
 268 extern int prom_setprop(int node, char *prop_name, char *prop_value,
 269                         int value_size);
 270
 271 extern int prom_pathtoinode(char *path);
 272 extern int prom_inst2pkg(int);
 273
 274 /* Dorking with Bus ranges... */
 275
 276 /* Adjust reg values with the passed ranges. */
 277 extern void prom_adjust_regs(struct linux_prom_registers *regp, int nregs,
 278                              struct linux_prom_ranges *rangep, int nranges);
 279
 280 /* Adjust child ranges with the passed parent ranges. */
 281 extern void prom_adjust_ranges(struct linux_prom_ranges *cranges, int ncranges,
 282                                struct linux_prom_ranges *pranges, int npranges);
 283
 284 /* Apply promlib probed OBIO ranges to registers. */
 285 extern void prom_apply_obio_ranges(struct linux_prom_registers *obioregs, int nregs);
 286
 287 /* Apply ranges of any prom node (and optionally parent node as well) to registers. */
 288 extern void prom_apply_generic_ranges(int node, int parent,
 289                                       struct linux_prom_registers *sbusregs, int nregs);
 290
 291
 292 #endif /* !(__SPARC_OPLIB_H) */