arch/sparc/include/asm/oplib_32.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 };
  25
  26 extern enum prom_major_version prom_vers;
  27 /* Revision, and firmware revision. */
  28 extern unsigned int prom_rev, prom_prev;
  29
  30 /* Root node of the prom device tree, this stays constant after
  31  * initialization is complete.
  32  */
  33 extern int prom_root_node;
  34
  35 /* Pointer to prom structure containing the device tree traversal
  36  * and usage utility functions.  Only prom-lib should use these,
  37  * users use the interface defined by the library only!
  38  */
  39 extern struct linux_nodeops *prom_nodeops;
  40
  41 /* The functions... */
  42
  43 /* You must call prom_init() before using any of the library services,
  44  * preferably as early as possible.  Pass it the romvec pointer.
  45  */
  46 extern void prom_init(struct linux_romvec *rom_ptr);
  47
  48 /* Boot argument acquisition, returns the boot command line string. */
  49 extern char *prom_getbootargs(void);
  50
  51 /* Device utilities. */
  52
  53 /* Map and unmap devices in IO space at virtual addresses. Note that the
  54  * virtual address you pass is a request and the prom may put your mappings
  55  * somewhere else, so check your return value as that is where your new
  56  * mappings really are!
  57  *
  58  * Another note, these are only available on V2 or higher proms!
  59  */
  60 extern char *prom_mapio(char *virt_hint, int io_space, unsigned int phys_addr, unsigned int num_bytes);
  61 extern void prom_unmapio(char *virt_addr, unsigned int num_bytes);
  62
  63 /* Device operations. */
  64
  65 /* Open the device described by the passed string.  Note, that the format
  66  * of the string is different on V0 vs. V2->higher proms.  The caller must
  67  * know what he/she is doing!  Returns the device descriptor, an int.
  68  */
  69 extern int prom_devopen(char *device_string);
  70
  71 /* Close a previously opened device described by the passed integer
  72  * descriptor.
  73  */
  74 extern int prom_devclose(int device_handle);
  75
  76 /* Do a seek operation on the device described by the passed integer
  77  * descriptor.
  78  */
  79 extern void prom_seek(int device_handle, unsigned int seek_hival,
  80                       unsigned int seek_lowval);
  81
  82 /* Miscellaneous routines, don't really fit in any category per se. */
  83
  84 /* Reboot the machine with the command line passed. */
  85 extern void prom_reboot(char *boot_command);
  86
  87 /* Evaluate the forth string passed. */
  88 extern void prom_feval(char *forth_string);
  89
  90 /* Enter the prom, with possibility of continuation with the 'go'
  91  * command in newer proms.
  92  */
  93 extern void prom_cmdline(void);
  94
  95 /* Enter the prom, with no chance of continuation for the stand-alone
  96  * which calls this.
  97  */
  98 extern void prom_halt(void) __attribute__ ((noreturn));
  99
 100 /* Set the PROM 'sync' callback function to the passed function pointer.
 101  * When the user gives the 'sync' command at the prom prompt while the
 102  * kernel is still active, the prom will call this routine.
 103  *
 104  * XXX The arguments are different on V0 vs. V2->higher proms, grrr! XXX
 105  */
 106 typedef void (*sync_func_t)(void);
 107 extern void prom_setsync(sync_func_t func_ptr);
 108
 109 /* Acquire the IDPROM of the root node in the prom device tree.  This
 110  * gets passed a buffer where you would like it stuffed.  The return value
 111  * is the format type of this idprom or 0xff on error.
 112  */
 113 extern unsigned char prom_get_idprom(char *idp_buffer, int idpbuf_size);
 114
 115 /* Get the prom major version. */
 116 extern int prom_version(void);
 117
 118 /* Get the prom plugin revision. */
 119 extern int prom_getrev(void);
 120
 121 /* Get the prom firmware revision. */
 122 extern int prom_getprev(void);
 123
 124 /* Character operations to/from the console.... */
 125
 126 /* Non-blocking get character from console. */
 127 extern int prom_nbgetchar(void);
 128
 129 /* Non-blocking put character to console. */
 130 extern int prom_nbputchar(char character);
 131
 132 /* Blocking get character from console. */
 133 extern char prom_getchar(void);
 134
 135 /* Blocking put character to console. */
 136 extern void prom_putchar(char character);
 137
 138 /* Prom's internal routines, don't use in kernel/boot code. */
 139 extern void prom_printf(const char *fmt, ...);
 140 extern void prom_write(const char *buf, unsigned int len);
 141
 142 /* Multiprocessor operations... */
 143
 144 /* Start the CPU with the given device tree node, context table, and context
 145  * at the passed program counter.
 146  */
 147 extern int prom_startcpu(int cpunode, struct linux_prom_registers *context_table,
 148                          int context, char *program_counter);
 149
 150 /* Stop the CPU with the passed device tree node. */
 151 extern int prom_stopcpu(int cpunode);
 152
 153 /* Idle the CPU with the passed device tree node. */
 154 extern int prom_idlecpu(int cpunode);
 155
 156 /* Re-Start the CPU with the passed device tree node. */
 157 extern int prom_restartcpu(int cpunode);
 158
 159 /* PROM memory allocation facilities... */
 160
 161 /* Allocated at possibly the given virtual address a chunk of the
 162  * indicated size.
 163  */
 164 extern char *prom_alloc(char *virt_hint, unsigned int size);
 165
 166 /* Free a previously allocated chunk. */
 167 extern void prom_free(char *virt_addr, unsigned int size);
 168
 169 /* Sun4/sun4c specific memory-management startup hook. */
 170
 171 /* Map the passed segment in the given context at the passed
 172  * virtual address.
 173  */
 174 extern void prom_putsegment(int context, unsigned long virt_addr,
 175                             int physical_segment);
 176
 177
 178 /* PROM device tree traversal functions... */
 179
 180 /* Get the child node of the given node, or zero if no child exists. */
 181 extern int prom_getchild(int parent_node);
 182
 183 /* Get the next sibling node of the given node, or zero if no further
 184  * siblings exist.
 185  */
 186 extern int prom_getsibling(int node);
 187
 188 /* Get the length, at the passed node, of the given property type.
 189  * Returns -1 on error (ie. no such property at this node).
 190  */
 191 extern int prom_getproplen(int thisnode, const char *property);
 192
 193 /* Fetch the requested property using the given buffer.  Returns
 194  * the number of bytes the prom put into your buffer or -1 on error.
 195  */
 196 extern int __must_check prom_getproperty(int thisnode, const char *property,
 197                                          char *prop_buffer, int propbuf_size);
 198
 199 /* Acquire an integer property. */
 200 extern int prom_getint(int node, char *property);
 201
 202 /* Acquire an integer property, with a default value. */
 203 extern int prom_getintdefault(int node, char *property, int defval);
 204
 205 /* Acquire a boolean property, 0=FALSE 1=TRUE. */
 206 extern int prom_getbool(int node, char *prop);
 207
 208 /* Acquire a string property, null string on error. */
 209 extern void prom_getstring(int node, char *prop, char *buf, int bufsize);
 210
 211 /* Does the passed node have the given "name"? YES=1 NO=0 */
 212 extern int prom_nodematch(int thisnode, char *name);
 213
 214 /* Search all siblings starting at the passed node for "name" matching
 215  * the given string.  Returns the node on success, zero on failure.
 216  */
 217 extern int prom_searchsiblings(int node_start, char *name);
 218
 219 /* Return the first property type, as a string, for the given node.
 220  * Returns a null string on error.
 221  */
 222 extern char *prom_firstprop(int node, char *buffer);
 223
 224 /* Returns the next property after the passed property for the given
 225  * node.  Returns null string on failure.
 226  */
 227 extern char *prom_nextprop(int node, char *prev_property, char *buffer);
 228
 229 /* Returns phandle of the path specified */
 230 extern int prom_finddevice(char *name);
 231
 232 /* Returns 1 if the specified node has given property. */
 233 extern int prom_node_has_property(int node, char *property);
 234
 235 /* Set the indicated property at the given node with the passed value.
 236  * Returns the number of bytes of your value that the prom took.
 237  */
 238 extern int prom_setprop(int node, const char *prop_name, char *prop_value,
 239                         int value_size);
 240
 241 extern int prom_pathtoinode(char *path);
 242 extern int prom_inst2pkg(int);
 243
 244 /* Dorking with Bus ranges... */
 245
 246 /* Apply promlib probes OBIO ranges to registers. */
 247 extern void prom_apply_obio_ranges(struct linux_prom_registers *obioregs, int nregs);
 248
 249 /* Apply ranges of any prom node (and optionally parent node as well) to registers. */
 250 extern void prom_apply_generic_ranges(int node, int parent,
 251                                       struct linux_prom_registers *sbusregs, int nregs);
 252
 253 /* CPU probing helpers.  */
 254 int cpu_find_by_instance(int instance, int *prom_node, int *mid);
 255 int cpu_find_by_mid(int mid, int *prom_node);
 256 int cpu_get_hwmid(int prom_node);
 257
 258 extern spinlock_t prom_lock;
 259
 260 #endif /* !(__SPARC_OPLIB_H) */