2 * oplib.h: Describes the interface and available routines in the
5 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
8 #ifndef __SPARC_OPLIB_H
9 #define __SPARC_OPLIB_H
11 #include <asm/openprom.h>
12 #include <linux/spinlock.h>
13 #include <linux/compiler.h>
15 /* The master romvec pointer... */
16 extern struct linux_romvec *romvec;
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_SUN4, /* Old sun4 proms are totally different, but we'll shoehorn it to make it fit */
27 extern enum prom_major_version prom_vers;
28 /* Revision, and firmware revision. */
29 extern unsigned int prom_rev, prom_prev;
31 /* Root node of the prom device tree, this stays constant after
32 * initialization is complete.
34 extern int prom_root_node;
36 /* Pointer to prom structure containing the device tree traversal
37 * and usage utility functions. Only prom-lib should use these,
38 * users use the interface defined by the library only!
40 extern struct linux_nodeops *prom_nodeops;
42 /* The functions... */
44 /* You must call prom_init() before using any of the library services,
45 * preferably as early as possible. Pass it the romvec pointer.
47 extern void prom_init(struct linux_romvec *rom_ptr);
49 /* Boot argument acquisition, returns the boot command line string. */
50 extern char *prom_getbootargs(void);
52 /* Device utilities. */
54 /* Map and unmap devices in IO space at virtual addresses. Note that the
55 * virtual address you pass is a request and the prom may put your mappings
56 * somewhere else, so check your return value as that is where your new
57 * mappings really are!
59 * Another note, these are only available on V2 or higher proms!
61 extern char *prom_mapio(char *virt_hint, int io_space, unsigned int phys_addr, unsigned int num_bytes);
62 extern void prom_unmapio(char *virt_addr, unsigned int num_bytes);
64 /* Device operations. */
66 /* Open the device described by the passed string. Note, that the format
67 * of the string is different on V0 vs. V2->higher proms. The caller must
68 * know what he/she is doing! Returns the device descriptor, an int.
70 extern int prom_devopen(char *device_string);
72 /* Close a previously opened device described by the passed integer
75 extern int prom_devclose(int device_handle);
77 /* Do a seek operation on the device described by the passed integer
80 extern void prom_seek(int device_handle, unsigned int seek_hival,
81 unsigned int seek_lowval);
83 /* Miscellaneous routines, don't really fit in any category per se. */
85 /* Reboot the machine with the command line passed. */
86 extern void prom_reboot(char *boot_command);
88 /* Evaluate the forth string passed. */
89 extern void prom_feval(char *forth_string);
91 /* Enter the prom, with possibility of continuation with the 'go'
92 * command in newer proms.
94 extern void prom_cmdline(void);
96 /* Enter the prom, with no chance of continuation for the stand-alone
99 extern void prom_halt(void) __attribute__ ((noreturn));
101 /* Set the PROM 'sync' callback function to the passed function pointer.
102 * When the user gives the 'sync' command at the prom prompt while the
103 * kernel is still active, the prom will call this routine.
105 * XXX The arguments are different on V0 vs. V2->higher proms, grrr! XXX
107 typedef void (*sync_func_t)(void);
108 extern void prom_setsync(sync_func_t func_ptr);
110 /* Acquire the IDPROM of the root node in the prom device tree. This
111 * gets passed a buffer where you would like it stuffed. The return value
112 * is the format type of this idprom or 0xff on error.
114 extern unsigned char prom_get_idprom(char *idp_buffer, int idpbuf_size);
116 /* Get the prom major version. */
117 extern int prom_version(void);
119 /* Get the prom plugin revision. */
120 extern int prom_getrev(void);
122 /* Get the prom firmware revision. */
123 extern int prom_getprev(void);
125 /* Character operations to/from the console.... */
127 /* Non-blocking get character from console. */
128 extern int prom_nbgetchar(void);
130 /* Non-blocking put character to console. */
131 extern int prom_nbputchar(char character);
133 /* Blocking get character from console. */
134 extern char prom_getchar(void);
136 /* Blocking put character to console. */
137 extern void prom_putchar(char character);
139 /* Prom's internal routines, don't use in kernel/boot code. */
140 extern void prom_printf(char *fmt, ...);
141 extern void prom_write(const char *buf, unsigned int len);
143 /* Multiprocessor operations... */
145 /* Start the CPU with the given device tree node, context table, and context
146 * at the passed program counter.
148 extern int prom_startcpu(int cpunode, struct linux_prom_registers *context_table,
149 int context, char *program_counter);
151 /* Stop the CPU with the passed device tree node. */
152 extern int prom_stopcpu(int cpunode);
154 /* Idle the CPU with the passed device tree node. */
155 extern int prom_idlecpu(int cpunode);
157 /* Re-Start the CPU with the passed device tree node. */
158 extern int prom_restartcpu(int cpunode);
160 /* PROM memory allocation facilities... */
162 /* Allocated at possibly the given virtual address a chunk of the
165 extern char *prom_alloc(char *virt_hint, unsigned int size);
167 /* Free a previously allocated chunk. */
168 extern void prom_free(char *virt_addr, unsigned int size);
170 /* Sun4/sun4c specific memory-management startup hook. */
172 /* Map the passed segment in the given context at the passed
175 extern void prom_putsegment(int context, unsigned long virt_addr,
176 int physical_segment);
179 /* PROM device tree traversal functions... */
181 #ifdef PROMLIB_INTERNAL
183 /* Internal version of prom_getchild. */
184 extern int __prom_getchild(int parent_node);
186 /* Internal version of prom_getsibling. */
187 extern int __prom_getsibling(int node);
192 /* Get the child node of the given node, or zero if no child exists. */
193 extern int prom_getchild(int parent_node);
195 /* Get the next sibling node of the given node, or zero if no further
198 extern int prom_getsibling(int node);
200 /* Get the length, at the passed node, of the given property type.
201 * Returns -1 on error (ie. no such property at this node).
203 extern int prom_getproplen(int thisnode, char *property);
205 /* Fetch the requested property using the given buffer. Returns
206 * the number of bytes the prom put into your buffer or -1 on error.
208 extern int __must_check prom_getproperty(int thisnode, char *property,
209 char *prop_buffer, int propbuf_size);
211 /* Acquire an integer property. */
212 extern int prom_getint(int node, char *property);
214 /* Acquire an integer property, with a default value. */
215 extern int prom_getintdefault(int node, char *property, int defval);
217 /* Acquire a boolean property, 0=FALSE 1=TRUE. */
218 extern int prom_getbool(int node, char *prop);
220 /* Acquire a string property, null string on error. */
221 extern void prom_getstring(int node, char *prop, char *buf, int bufsize);
223 /* Does the passed node have the given "name"? YES=1 NO=0 */
224 extern int prom_nodematch(int thisnode, char *name);
226 /* Search all siblings starting at the passed node for "name" matching
227 * the given string. Returns the node on success, zero on failure.
229 extern int prom_searchsiblings(int node_start, char *name);
231 /* Return the first property type, as a string, for the given node.
232 * Returns a null string on error.
234 extern char *prom_firstprop(int node, char *buffer);
236 /* Returns the next property after the passed property for the given
237 * node. Returns null string on failure.
239 extern char *prom_nextprop(int node, char *prev_property, char *buffer);
241 /* Returns phandle of the path specified */
242 extern int prom_finddevice(char *name);
244 /* Returns 1 if the specified node has given property. */
245 extern int prom_node_has_property(int node, char *property);
247 /* Set the indicated property at the given node with the passed value.
248 * Returns the number of bytes of your value that the prom took.
250 extern int prom_setprop(int node, char *prop_name, char *prop_value,
253 extern int prom_pathtoinode(char *path);
254 extern int prom_inst2pkg(int);
256 /* Dorking with Bus ranges... */
258 /* Apply promlib probes OBIO ranges to registers. */
259 extern void prom_apply_obio_ranges(struct linux_prom_registers *obioregs, int nregs);
261 /* Apply ranges of any prom node (and optionally parent node as well) to registers. */
262 extern void prom_apply_generic_ranges(int node, int parent,
263 struct linux_prom_registers *sbusregs, int nregs);
265 /* CPU probing helpers. */
266 int cpu_find_by_instance(int instance, int *prom_node, int *mid);
267 int cpu_find_by_mid(int mid, int *prom_node);
268 int cpu_get_hwmid(int prom_node);
270 extern spinlock_t prom_lock;
272 #endif /* !(__SPARC_OPLIB_H) */