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gerrit-public.fairphone.software / kernel / msm / f4e9ce66c70c5d08b8a4d2c676924748c8b7550b / . / include / asm-sparc / oplib.h
blob: f283f8aaf6a95eb230f0c675441ac35d8e57daef [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1/* $Id: oplib.h,v 1.23 2001/12/21 00:54:31 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#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_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
28extern enum prom_major_version prom_vers;
29/* Revision, and firmware revision. */
30extern unsigned int prom_rev, prom_prev;
31
32/* Root node of the prom device tree, this stays constant after
33 * initialization is complete.
34 */
35extern int prom_root_node;
36
37/* PROM stdin and stdout */
38extern int prom_stdin, prom_stdout;
39
40/* Pointer to prom structure containing the device tree traversal
41 * and usage utility functions. Only prom-lib should use these,
42 * users use the interface defined by the library only!
43 */
44extern struct linux_nodeops *prom_nodeops;
45
46/* The functions... */
47
48/* You must call prom_init() before using any of the library services,
49 * preferably as early as possible. Pass it the romvec pointer.
50 */
51extern void prom_init(struct linux_romvec *rom_ptr);
52
53/* Boot argument acquisition, returns the boot command line string. */
54extern char *prom_getbootargs(void);
55
56/* Device utilities. */
57
58/* Map and unmap devices in IO space at virtual addresses. Note that the
59 * virtual address you pass is a request and the prom may put your mappings
60 * somewhere else, so check your return value as that is where your new
61 * mappings really are!
62 *
63 * Another note, these are only available on V2 or higher proms!
64 */
65extern char *prom_mapio(char *virt_hint, int io_space, unsigned int phys_addr, unsigned int num_bytes);
66extern void prom_unmapio(char *virt_addr, unsigned int num_bytes);
67
68/* Device operations. */
69
70/* Open the device described by the passed string. Note, that the format
71 * of the string is different on V0 vs. V2->higher proms. The caller must
72 * know what he/she is doing! Returns the device descriptor, an int.
73 */
74extern int prom_devopen(char *device_string);
75
76/* Close a previously opened device described by the passed integer
77 * descriptor.
78 */
79extern int prom_devclose(int device_handle);
80
81/* Do a seek operation on the device described by the passed integer
82 * descriptor.
83 */
84extern void prom_seek(int device_handle, unsigned int seek_hival,
85 unsigned int seek_lowval);
86
87/* Machine memory configuration routine. */
88
89/* This function returns a V0 format memory descriptor table, it has three
90 * entries. One for the total amount of physical ram on the machine, one
91 * for the amount of physical ram available, and one describing the virtual
92 * areas which are allocated by the prom. So, in a sense the physical
93 * available is a calculation of the total physical minus the physical mapped
94 * by the prom with virtual mappings.
95 *
96 * These lists are returned pre-sorted, this should make your life easier
97 * since the prom itself is way too lazy to do such nice things.
98 */
99extern struct linux_mem_v0 *prom_meminfo(void);
100
101/* Miscellaneous routines, don't really fit in any category per se. */
102
103/* Reboot the machine with the command line passed. */
104extern void prom_reboot(char *boot_command);
105
106/* Evaluate the forth string passed. */
107extern void prom_feval(char *forth_string);
108
109/* Enter the prom, with possibility of continuation with the 'go'
110 * command in newer proms.
111 */
112extern void prom_cmdline(void);
113
114/* Enter the prom, with no chance of continuation for the stand-alone
115 * which calls this.
116 */
117extern void prom_halt(void) __attribute__ ((noreturn));
118
119/* Set the PROM 'sync' callback function to the passed function pointer.
120 * When the user gives the 'sync' command at the prom prompt while the
121 * kernel is still active, the prom will call this routine.
122 *
123 * XXX The arguments are different on V0 vs. V2->higher proms, grrr! XXX
124 */
125typedef void (*sync_func_t)(void);
126extern void prom_setsync(sync_func_t func_ptr);
127
128/* Acquire the IDPROM of the root node in the prom device tree. This
129 * gets passed a buffer where you would like it stuffed. The return value
130 * is the format type of this idprom or 0xff on error.
131 */
132extern unsigned char prom_get_idprom(char *idp_buffer, int idpbuf_size);
133
134/* Get the prom major version. */
135extern int prom_version(void);
136
137/* Get the prom plugin revision. */
138extern int prom_getrev(void);
139
140/* Get the prom firmware revision. */
141extern int prom_getprev(void);
142
143/* Character operations to/from the console.... */
144
145/* Non-blocking get character from console. */
146extern int prom_nbgetchar(void);
147
148/* Non-blocking put character to console. */
149extern int prom_nbputchar(char character);
150
151/* Blocking get character from console. */
152extern char prom_getchar(void);
153
154/* Blocking put character to console. */
155extern void prom_putchar(char character);
156
157/* Prom's internal routines, don't use in kernel/boot code. */
158extern void prom_printf(char *fmt, ...);
159extern void prom_write(const char *buf, unsigned int len);
160
161/* Query for input device type */
162
163enum prom_input_device {
164 PROMDEV_IKBD, /* input from keyboard */
165 PROMDEV_ITTYA, /* input from ttya */
166 PROMDEV_ITTYB, /* input from ttyb */
David S. Millerf7111ce2006-01-18 21:57:37 -0800[diff] [blame]167 PROMDEV_IRSC, /* input from rsc */
David S. Miller1a7a2422006-02-11 23:24:30 -0800[diff] [blame]168 PROMDEV_IVCONS, /* input from virtual-console */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]169 PROMDEV_I_UNK,
170};
171
172extern enum prom_input_device prom_query_input_device(void);
173
174/* Query for output device type */
175
176enum prom_output_device {
177 PROMDEV_OSCREEN, /* to screen */
178 PROMDEV_OTTYA, /* to ttya */
179 PROMDEV_OTTYB, /* to ttyb */
David S. Millerf7111ce2006-01-18 21:57:37 -0800[diff] [blame]180 PROMDEV_ORSC, /* to rsc */
David S. Miller1a7a2422006-02-11 23:24:30 -0800[diff] [blame]181 PROMDEV_OVCONS, /* to virtual-console */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]182 PROMDEV_O_UNK,
183};
184
185extern enum prom_output_device prom_query_output_device(void);
186
187/* Multiprocessor operations... */
188
189/* Start the CPU with the given device tree node, context table, and context
190 * at the passed program counter.
191 */
192extern int prom_startcpu(int cpunode, struct linux_prom_registers *context_table,
193 int context, char *program_counter);
194
195/* Stop the CPU with the passed device tree node. */
196extern int prom_stopcpu(int cpunode);
197
198/* Idle the CPU with the passed device tree node. */
199extern int prom_idlecpu(int cpunode);
200
201/* Re-Start the CPU with the passed device tree node. */
202extern int prom_restartcpu(int cpunode);
203
204/* PROM memory allocation facilities... */
205
206/* Allocated at possibly the given virtual address a chunk of the
207 * indicated size.
208 */
209extern char *prom_alloc(char *virt_hint, unsigned int size);
210
211/* Free a previously allocated chunk. */
212extern void prom_free(char *virt_addr, unsigned int size);
213
214/* Sun4/sun4c specific memory-management startup hook. */
215
216/* Map the passed segment in the given context at the passed
217 * virtual address.
218 */
219extern void prom_putsegment(int context, unsigned long virt_addr,
220 int physical_segment);
221
222
223/* PROM device tree traversal functions... */
224
225#ifdef PROMLIB_INTERNAL
226
227/* Internal version of prom_getchild. */
228extern int __prom_getchild(int parent_node);
229
230/* Internal version of prom_getsibling. */
231extern int __prom_getsibling(int node);
232
233#endif
234
235
236/* Get the child node of the given node, or zero if no child exists. */
237extern int prom_getchild(int parent_node);
238
239/* Get the next sibling node of the given node, or zero if no further
240 * siblings exist.
241 */
242extern int prom_getsibling(int node);
243
244/* Get the length, at the passed node, of the given property type.
245 * Returns -1 on error (ie. no such property at this node).
246 */
247extern int prom_getproplen(int thisnode, char *property);
248
249/* Fetch the requested property using the given buffer. Returns
250 * the number of bytes the prom put into your buffer or -1 on error.
251 */
252extern int __must_check prom_getproperty(int thisnode, char *property,
253 char *prop_buffer, int propbuf_size);
254
255/* Acquire an integer property. */
256extern int prom_getint(int node, char *property);
257
258/* Acquire an integer property, with a default value. */
259extern int prom_getintdefault(int node, char *property, int defval);
260
261/* Acquire a boolean property, 0=FALSE 1=TRUE. */
262extern int prom_getbool(int node, char *prop);
263
264/* Acquire a string property, null string on error. */
265extern void prom_getstring(int node, char *prop, char *buf, int bufsize);
266
267/* Does the passed node have the given "name"? YES=1 NO=0 */
268extern int prom_nodematch(int thisnode, char *name);
269
270/* Puts in buffer a prom name in the form name@x,y or name (x for which_io
271 * and y for first regs phys address
272 */
273extern int prom_getname(int node, char *buf, int buflen);
274
275/* Search all siblings starting at the passed node for "name" matching
276 * the given string. Returns the node on success, zero on failure.
277 */
278extern int prom_searchsiblings(int node_start, char *name);
279
280/* Return the first property type, as a string, for the given node.
281 * Returns a null string on error.
282 */
283extern char *prom_firstprop(int node, char *buffer);
284
285/* Returns the next property after the passed property for the given
286 * node. Returns null string on failure.
287 */
288extern char *prom_nextprop(int node, char *prev_property, char *buffer);
289
290/* Returns phandle of the path specified */
291extern int prom_finddevice(char *name);
292
293/* Returns 1 if the specified node has given property. */
294extern int prom_node_has_property(int node, char *property);
295
296/* Set the indicated property at the given node with the passed value.
297 * Returns the number of bytes of your value that the prom took.
298 */
299extern int prom_setprop(int node, char *prop_name, char *prop_value,
300 int value_size);
301
302extern int prom_pathtoinode(char *path);
303extern int prom_inst2pkg(int);
304
305/* Dorking with Bus ranges... */
306
307/* Apply promlib probes OBIO ranges to registers. */
308extern void prom_apply_obio_ranges(struct linux_prom_registers *obioregs, int nregs);
309
310/* Apply ranges of any prom node (and optionally parent node as well) to registers. */
311extern void prom_apply_generic_ranges(int node, int parent,
312 struct linux_prom_registers *sbusregs, int nregs);
313
314/* CPU probing helpers. */
315int cpu_find_by_instance(int instance, int *prom_node, int *mid);
316int cpu_find_by_mid(int mid, int *prom_node);
317int cpu_get_hwmid(int prom_node);
318
319extern spinlock_t prom_lock;
320
321#endif /* !(__SPARC_OPLIB_H) */