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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... */
16extern struct linux_romvec *romvec;
17
18/* Enumeration to describe the prom major version we have detected. */
19enum 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 */
25};
26
27extern enum prom_major_version prom_vers;
28/* Revision, and firmware revision. */
29extern unsigned int prom_rev, prom_prev;
30
31/* Root node of the prom device tree, this stays constant after
32 * initialization is complete.
33 */
34extern int prom_root_node;
35
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!
39 */
40extern struct linux_nodeops *prom_nodeops;
41
42/* The functions... */
43
44/* You must call prom_init() before using any of the library services,
45 * preferably as early as possible. Pass it the romvec pointer.
46 */
47extern void prom_init(struct linux_romvec *rom_ptr);
48
49/* Boot argument acquisition, returns the boot command line string. */
50extern char *prom_getbootargs(void);
51
52/* Device utilities. */
53
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!
58 *
59 * Another note, these are only available on V2 or higher proms!
60 */
61extern char *prom_mapio(char *virt_hint, int io_space, unsigned int phys_addr, unsigned int num_bytes);
62extern void prom_unmapio(char *virt_addr, unsigned int num_bytes);
63
64/* Device operations. */
65
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.
69 */
70extern int prom_devopen(char *device_string);
71
72/* Close a previously opened device described by the passed integer
73 * descriptor.
74 */
75extern int prom_devclose(int device_handle);
76
77/* Do a seek operation on the device described by the passed integer
78 * descriptor.
79 */
80extern void prom_seek(int device_handle, unsigned int seek_hival,
81 unsigned int seek_lowval);
82
83/* Miscellaneous routines, don't really fit in any category per se. */
84
85/* Reboot the machine with the command line passed. */
86extern void prom_reboot(char *boot_command);
87
88/* Evaluate the forth string passed. */
89extern void prom_feval(char *forth_string);
90
91/* Enter the prom, with possibility of continuation with the 'go'
92 * command in newer proms.
93 */
94extern void prom_cmdline(void);
95
96/* Enter the prom, with no chance of continuation for the stand-alone
97 * which calls this.
98 */
99extern void prom_halt(void) __attribute__ ((noreturn));
100
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.
104 *
105 * XXX The arguments are different on V0 vs. V2->higher proms, grrr! XXX
106 */
107typedef void (*sync_func_t)(void);
108extern void prom_setsync(sync_func_t func_ptr);
109
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.
113 */
114extern unsigned char prom_get_idprom(char *idp_buffer, int idpbuf_size);
115
116/* Get the prom major version. */
117extern int prom_version(void);
118
119/* Get the prom plugin revision. */
120extern int prom_getrev(void);
121
122/* Get the prom firmware revision. */
123extern int prom_getprev(void);
124
125/* Character operations to/from the console.... */
126
127/* Non-blocking get character from console. */
128extern int prom_nbgetchar(void);
129
130/* Non-blocking put character to console. */
131extern int prom_nbputchar(char character);
132
133/* Blocking get character from console. */
134extern char prom_getchar(void);
135
136/* Blocking put character to console. */
137extern void prom_putchar(char character);
138
139/* Prom's internal routines, don't use in kernel/boot code. */
140extern void prom_printf(char *fmt, ...);
141extern void prom_write(const char *buf, unsigned int len);
142
143/* Multiprocessor operations... */
144
145/* Start the CPU with the given device tree node, context table, and context
146 * at the passed program counter.
147 */
148extern int prom_startcpu(int cpunode, struct linux_prom_registers *context_table,
149 int context, char *program_counter);
150
151/* Stop the CPU with the passed device tree node. */
152extern int prom_stopcpu(int cpunode);
153
154/* Idle the CPU with the passed device tree node. */
155extern int prom_idlecpu(int cpunode);
156
157/* Re-Start the CPU with the passed device tree node. */
158extern int prom_restartcpu(int cpunode);
159
160/* PROM memory allocation facilities... */
161
162/* Allocated at possibly the given virtual address a chunk of the
163 * indicated size.
164 */
165extern char *prom_alloc(char *virt_hint, unsigned int size);
166
167/* Free a previously allocated chunk. */
168extern void prom_free(char *virt_addr, unsigned int size);
169
170/* Sun4/sun4c specific memory-management startup hook. */
171
172/* Map the passed segment in the given context at the passed
173 * virtual address.
174 */
175extern void prom_putsegment(int context, unsigned long virt_addr,
176 int physical_segment);
177
178
179/* PROM device tree traversal functions... */
180
181#ifdef PROMLIB_INTERNAL
182
183/* Internal version of prom_getchild. */
184extern int __prom_getchild(int parent_node);
185
186/* Internal version of prom_getsibling. */
187extern int __prom_getsibling(int node);
188
189#endif
190
191
192/* Get the child node of the given node, or zero if no child exists. */
193extern int prom_getchild(int parent_node);
194
195/* Get the next sibling node of the given node, or zero if no further
196 * siblings exist.
197 */
198extern int prom_getsibling(int node);
199
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).
202 */
203extern int prom_getproplen(int thisnode, char *property);
204
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.
207 */
208extern int __must_check prom_getproperty(int thisnode, char *property,
209 char *prop_buffer, int propbuf_size);
210
211/* Acquire an integer property. */
212extern int prom_getint(int node, char *property);
213
214/* Acquire an integer property, with a default value. */
215extern int prom_getintdefault(int node, char *property, int defval);
216
217/* Acquire a boolean property, 0=FALSE 1=TRUE. */
218extern int prom_getbool(int node, char *prop);
219
220/* Acquire a string property, null string on error. */
221extern void prom_getstring(int node, char *prop, char *buf, int bufsize);
222
223/* Does the passed node have the given "name"? YES=1 NO=0 */
224extern int prom_nodematch(int thisnode, char *name);
225
226/* Search all siblings starting at the passed node for "name" matching
227 * the given string. Returns the node on success, zero on failure.
228 */
229extern int prom_searchsiblings(int node_start, char *name);
230
231/* Return the first property type, as a string, for the given node.
232 * Returns a null string on error.
233 */
234extern char *prom_firstprop(int node, char *buffer);
235
236/* Returns the next property after the passed property for the given
237 * node. Returns null string on failure.
238 */
239extern char *prom_nextprop(int node, char *prev_property, char *buffer);
240
241/* Returns phandle of the path specified */
242extern int prom_finddevice(char *name);
243
244/* Returns 1 if the specified node has given property. */
245extern int prom_node_has_property(int node, char *property);
246
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.
249 */
250extern int prom_setprop(int node, char *prop_name, char *prop_value,
251 int value_size);
252
253extern int prom_pathtoinode(char *path);
254extern int prom_inst2pkg(int);
255
256/* Dorking with Bus ranges... */
257
258/* Apply promlib probes OBIO ranges to registers. */
259extern void prom_apply_obio_ranges(struct linux_prom_registers *obioregs, int nregs);
260
261/* Apply ranges of any prom node (and optionally parent node as well) to registers. */
262extern void prom_apply_generic_ranges(int node, int parent,
263 struct linux_prom_registers *sbusregs, int nregs);
264
265/* CPU probing helpers. */
266int cpu_find_by_instance(int instance, int *prom_node, int *mid);
267int cpu_find_by_mid(int mid, int *prom_node);
268int cpu_get_hwmid(int prom_node);
269
270extern spinlock_t prom_lock;
271
272#endif /* !(__SPARC_OPLIB_H) */
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