include/asm-sparc/oplib.h

   1 /*
   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 #include <linux/spinlock.h>
  13 #include <linux/compiler.h>
  14
  15 /* The master romvec pointer... */
  16 extern struct linux_romvec *romvec;
  17
  18 /* Enumeration to describe the prom major version we have detected. */
  19 enum prom_major_version {
  20         PROM_V0,      /* Original sun4c V0 prom */
  21         PROM_V2,      /* sun4c and early sun4m V2 prom */
  22         PROM_V3,      /* sun4m and later, up to sun4d/sun4e machines V3 */
  23         PROM_P1275,   /* IEEE compliant ISA based Sun PROM, only sun4u */
  24         PROM_AP1000,  /* actually no prom at all */
  25         PROM_SUN4,    /* Old sun4 proms are totally different, but we'll shoehorn it to make it fit */
  26 };
  27
  28 extern enum prom_major_version prom_vers;
  29 /* Revision, and firmware revision. */
  30 extern unsigned int prom_rev, prom_prev;
  31
  32 /* Root node of the prom device tree, this stays constant after
  33  * initialization is complete.
  34  */
  35 extern int prom_root_node;
  36
  37 /* Pointer to prom structure containing the device tree traversal
  38  * and usage utility functions.  Only prom-lib should use these,
  39  * users use the interface defined by the library only!
  40  */
  41 extern struct linux_nodeops *prom_nodeops;
  42
  43 /* The functions... */
  44
  45 /* You must call prom_init() before using any of the library services,
  46  * preferably as early as possible.  Pass it the romvec pointer.
  47  */
  48 extern void prom_init(struct linux_romvec *rom_ptr);
  49
  50 /* Boot argument acquisition, returns the boot command line string. */
  51 extern char *prom_getbootargs(void);
  52
  53 /* Device utilities. */
  54
  55 /* Map and unmap devices in IO space at virtual addresses. Note that the
  56  * virtual address you pass is a request and the prom may put your mappings
  57  * somewhere else, so check your return value as that is where your new
  58  * mappings really are!
  59  *
  60  * Another note, these are only available on V2 or higher proms!
  61  */
  62 extern char *prom_mapio(char *virt_hint, int io_space, unsigned int phys_addr, unsigned int num_bytes);
  63 extern void prom_unmapio(char *virt_addr, unsigned int num_bytes);
  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 /* Miscellaneous routines, don't really fit in any category per se. */
  85
  86 /* Reboot the machine with the command line passed. */
  87 extern void prom_reboot(char *boot_command);
  88
  89 /* Evaluate the forth string passed. */
  90 extern void prom_feval(char *forth_string);
  91
  92 /* Enter the prom, with possibility of continuation with the 'go'
  93  * command in newer proms.
  94  */
  95 extern void prom_cmdline(void);
  96
  97 /* Enter the prom, with no chance of continuation for the stand-alone
  98  * which calls this.
  99  */
 100 extern void prom_halt(void) __attribute__ ((noreturn));
 101
 102 /* Set the PROM 'sync' callback function to the passed function pointer.
 103  * When the user gives the 'sync' command at the prom prompt while the
 104  * kernel is still active, the prom will call this routine.
 105  *
 106  * XXX The arguments are different on V0 vs. V2->higher proms, grrr! XXX
 107  */
 108 typedef void (*sync_func_t)(void);
 109 extern void prom_setsync(sync_func_t func_ptr);
 110
 111 /* Acquire the IDPROM of the root node in the prom device tree.  This
 112  * gets passed a buffer where you would like it stuffed.  The return value
 113  * is the format type of this idprom or 0xff on error.
 114  */
 115 extern unsigned char prom_get_idprom(char *idp_buffer, int idpbuf_size);
 116
 117 /* Get the prom major version. */
 118 extern int prom_version(void);
 119
 120 /* Get the prom plugin revision. */
 121 extern int prom_getrev(void);
 122
 123 /* Get the prom firmware revision. */
 124 extern int prom_getprev(void);
 125
 126 /* Character operations to/from the console.... */
 127
 128 /* Non-blocking get character from console. */
 129 extern int prom_nbgetchar(void);
 130
 131 /* Non-blocking put character to console. */
 132 extern int prom_nbputchar(char character);
 133
 134 /* Blocking get character from console. */
 135 extern char prom_getchar(void);
 136
 137 /* Blocking put character to console. */
 138 extern void prom_putchar(char character);
 139
 140 /* Prom's internal routines, don't use in kernel/boot code. */
 141 extern void prom_printf(char *fmt, ...);
 142 extern void prom_write(const char *buf, unsigned int len);
 143
 144 /* Multiprocessor operations... */
 145
 146 /* Start the CPU with the given device tree node, context table, and context
 147  * at the passed program counter.
 148  */
 149 extern int prom_startcpu(int cpunode, struct linux_prom_registers *context_table,
 150                          int context, char *program_counter);
 151
 152 /* Stop the CPU with the passed device tree node. */
 153 extern int prom_stopcpu(int cpunode);
 154
 155 /* Idle the CPU with the passed device tree node. */
 156 extern int prom_idlecpu(int cpunode);
 157
 158 /* Re-Start the CPU with the passed device tree node. */
 159 extern int prom_restartcpu(int cpunode);
 160
 161 /* PROM memory allocation facilities... */
 162
 163 /* Allocated at possibly the given virtual address a chunk of the
 164  * indicated size.
 165  */
 166 extern char *prom_alloc(char *virt_hint, unsigned int size);
 167
 168 /* Free a previously allocated chunk. */
 169 extern void prom_free(char *virt_addr, unsigned int size);
 170
 171 /* Sun4/sun4c specific memory-management startup hook. */
 172
 173 /* Map the passed segment in the given context at the passed
 174  * virtual address.
 175  */
 176 extern void prom_putsegment(int context, unsigned long virt_addr,
 177                             int physical_segment);
 178
 179
 180 /* PROM device tree traversal functions... */
 181
 182 #ifdef PROMLIB_INTERNAL
 183
 184 /* Internal version of prom_getchild. */
 185 extern int __prom_getchild(int parent_node);
 186
 187 /* Internal version of prom_getsibling. */
 188 extern int __prom_getsibling(int node);
 189
 190 #endif
 191
 192
 193 /* Get the child node of the given node, or zero if no child exists. */
 194 extern int prom_getchild(int parent_node);
 195
 196 /* Get the next sibling node of the given node, or zero if no further
 197  * siblings exist.
 198  */
 199 extern int prom_getsibling(int node);
 200
 201 /* Get the length, at the passed node, of the given property type.
 202  * Returns -1 on error (ie. no such property at this node).
 203  */
 204 extern int prom_getproplen(int thisnode, char *property);
 205
 206 /* Fetch the requested property using the given buffer.  Returns
 207  * the number of bytes the prom put into your buffer or -1 on error.
 208  */
 209 extern int __must_check prom_getproperty(int thisnode, char *property,
 210                                          char *prop_buffer, int propbuf_size);
 211
 212 /* Acquire an integer property. */
 213 extern int prom_getint(int node, char *property);
 214
 215 /* Acquire an integer property, with a default value. */
 216 extern int prom_getintdefault(int node, char *property, int defval);
 217
 218 /* Acquire a boolean property, 0=FALSE 1=TRUE. */
 219 extern int prom_getbool(int node, char *prop);
 220
 221 /* Acquire a string property, null string on error. */
 222 extern void prom_getstring(int node, char *prop, char *buf, int bufsize);
 223
 224 /* Does the passed node have the given "name"? YES=1 NO=0 */
 225 extern int prom_nodematch(int thisnode, char *name);
 226
 227 /* Search all siblings starting at the passed node for "name" matching
 228  * the given string.  Returns the node on success, zero on failure.
 229  */
 230 extern int prom_searchsiblings(int node_start, char *name);
 231
 232 /* Return the first property type, as a string, for the given node.
 233  * Returns a null string on error.
 234  */
 235 extern char *prom_firstprop(int node, char *buffer);
 236
 237 /* Returns the next property after the passed property for the given
 238  * node.  Returns null string on failure.
 239  */
 240 extern char *prom_nextprop(int node, char *prev_property, char *buffer);
 241
 242 /* Returns phandle of the path specified */
 243 extern int prom_finddevice(char *name);
 244
 245 /* Returns 1 if the specified node has given property. */
 246 extern int prom_node_has_property(int node, char *property);
 247
 248 /* Set the indicated property at the given node with the passed value.
 249  * Returns the number of bytes of your value that the prom took.
 250  */
 251 extern int prom_setprop(int node, char *prop_name, char *prop_value,
 252                         int value_size);
 253
 254 extern int prom_pathtoinode(char *path);
 255 extern int prom_inst2pkg(int);
 256
 257 /* Dorking with Bus ranges... */
 258
 259 /* Apply promlib probes OBIO ranges to registers. */
 260 extern void prom_apply_obio_ranges(struct linux_prom_registers *obioregs, int nregs);
 261
 262 /* Apply ranges of any prom node (and optionally parent node as well) to registers. */
 263 extern void prom_apply_generic_ranges(int node, int parent,
 264                                       struct linux_prom_registers *sbusregs, int nregs);
 265
 266 /* CPU probing helpers.  */
 267 int cpu_find_by_instance(int instance, int *prom_node, int *mid);
 268 int cpu_find_by_mid(int mid, int *prom_node);
 269 int cpu_get_hwmid(int prom_node);
 270
 271 extern spinlock_t prom_lock;
 272
 273 #endif /* !(__SPARC_OPLIB_H) */