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1/* oplib.h: Describes the interface and available routines in the
2 * Linux Prom library.
3 *
4 * Copyright (C) 1995, 2007 David S. Miller (davem@davemloft.net)
5 * Copyright (C) 1996 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
6 */
7
8#ifndef __SPARC64_OPLIB_H
9#define __SPARC64_OPLIB_H
10
11#include <asm/openprom.h>
12
13/* OBP version string. */
14extern char prom_version[];
15
16/* Root node of the prom device tree, this stays constant after
17 * initialization is complete.
18 */
19extern int prom_root_node;
20
21/* PROM stdin and stdout */
22extern int prom_stdin, prom_stdout;
23
24/* /chosen node of the prom device tree, this stays constant after
25 * initialization is complete.
26 */
27extern int prom_chosen_node;
28
29/* Helper values and strings in arch/sparc64/kernel/head.S */
30extern const char prom_peer_name[];
31extern const char prom_compatible_name[];
32extern const char prom_root_compatible[];
33extern const char prom_cpu_compatible[];
34extern const char prom_finddev_name[];
35extern const char prom_chosen_path[];
36extern const char prom_cpu_path[];
37extern const char prom_getprop_name[];
38extern const char prom_mmu_name[];
39extern const char prom_callmethod_name[];
40extern const char prom_translate_name[];
41extern const char prom_map_name[];
42extern const char prom_unmap_name[];
43extern int prom_mmu_ihandle_cache;
44extern unsigned int prom_boot_mapped_pc;
45extern unsigned int prom_boot_mapping_mode;
46extern unsigned long prom_boot_mapping_phys_high, prom_boot_mapping_phys_low;
47
48struct linux_mlist_p1275 {
49 struct linux_mlist_p1275 *theres_more;
50 unsigned long start_adr;
51 unsigned long num_bytes;
52};
53
54struct linux_mem_p1275 {
55 struct linux_mlist_p1275 **p1275_totphys;
56 struct linux_mlist_p1275 **p1275_prommap;
57 struct linux_mlist_p1275 **p1275_available; /* What we can use */
58};
59
60/* The functions... */
61
62/* You must call prom_init() before using any of the library services,
63 * preferably as early as possible. Pass it the romvec pointer.
64 */
65extern void prom_init(void *cif_handler, void *cif_stack);
66
67/* Boot argument acquisition, returns the boot command line string. */
68extern char *prom_getbootargs(void);
69
70/* Device utilities. */
71
72/* Device operations. */
73
74/* Open the device described by the passed string. Note, that the format
75 * of the string is different on V0 vs. V2->higher proms. The caller must
76 * know what he/she is doing! Returns the device descriptor, an int.
77 */
78extern int prom_devopen(const char *device_string);
79
80/* Close a previously opened device described by the passed integer
81 * descriptor.
82 */
83extern int prom_devclose(int device_handle);
84
85/* Do a seek operation on the device described by the passed integer
86 * descriptor.
87 */
88extern void prom_seek(int device_handle, unsigned int seek_hival,
89 unsigned int seek_lowval);
90
91/* Miscellaneous routines, don't really fit in any category per se. */
92
93/* Reboot the machine with the command line passed. */
94extern void prom_reboot(const char *boot_command);
95
96/* Evaluate the forth string passed. */
97extern void prom_feval(const char *forth_string);
98
99/* Enter the prom, with possibility of continuation with the 'go'
100 * command in newer proms.
101 */
102extern void prom_cmdline(void);
103
104/* Enter the prom, with no chance of continuation for the stand-alone
105 * which calls this.
106 */
107extern void prom_halt(void) __attribute__ ((noreturn));
108
109/* Halt and power-off the machine. */
110extern void prom_halt_power_off(void) __attribute__ ((noreturn));
111
112/* Set the PROM 'sync' callback function to the passed function pointer.
113 * When the user gives the 'sync' command at the prom prompt while the
114 * kernel is still active, the prom will call this routine.
115 *
116 */
117typedef int (*callback_func_t)(long *cmd);
118extern void prom_setcallback(callback_func_t func_ptr);
119
120/* Acquire the IDPROM of the root node in the prom device tree. This
121 * gets passed a buffer where you would like it stuffed. The return value
122 * is the format type of this idprom or 0xff on error.
123 */
124extern unsigned char prom_get_idprom(char *idp_buffer, int idpbuf_size);
125
126/* Character operations to/from the console.... */
127
128/* Non-blocking get character from console. */
129extern int prom_nbgetchar(void);
130
131/* Non-blocking put character to console. */
132extern int prom_nbputchar(char character);
133
134/* Blocking get character from console. */
135extern char prom_getchar(void);
136
137/* Blocking put character to console. */
138extern void prom_putchar(char character);
139
140/* Prom's internal routines, don't use in kernel/boot code. */
141extern void prom_printf(const char *fmt, ...);
142extern void prom_write(const char *buf, unsigned int len);
143
144/* Multiprocessor operations... */
145#ifdef CONFIG_SMP
146/* Start the CPU with the given device tree node at the passed program
147 * counter with the given arg passed in via register %o0.
148 */
149extern void prom_startcpu(int cpunode, unsigned long pc, unsigned long arg);
150
151/* Start the CPU with the given cpu ID at the passed program
152 * counter with the given arg passed in via register %o0.
153 */
154extern void prom_startcpu_cpuid(int cpuid, unsigned long pc, unsigned long arg);
155
156/* Stop the CPU with the given cpu ID. */
157extern void prom_stopcpu_cpuid(int cpuid);
158
159/* Stop the current CPU. */
160extern void prom_stopself(void);
161
162/* Idle the current CPU. */
163extern void prom_idleself(void);
164
165/* Resume the CPU with the passed device tree node. */
166extern void prom_resumecpu(int cpunode);
167#endif
168
169/* Power management interfaces. */
170
171/* Put the current CPU to sleep. */
172extern void prom_sleepself(void);
173
174/* Put the entire system to sleep. */
175extern int prom_sleepsystem(void);
176
177/* Initiate a wakeup event. */
178extern int prom_wakeupsystem(void);
179
180/* MMU and memory related OBP interfaces. */
181
182/* Get unique string identifying SIMM at given physical address. */
183extern int prom_getunumber(int syndrome_code,
184 unsigned long phys_addr,
185 char *buf, int buflen);
186
187/* Retain physical memory to the caller across soft resets. */
188extern unsigned long prom_retain(const char *name,
189 unsigned long pa_low, unsigned long pa_high,
190 long size, long align);
191
192/* Load explicit I/D TLB entries into the calling processor. */
193extern long prom_itlb_load(unsigned long index,
194 unsigned long tte_data,
195 unsigned long vaddr);
196
197extern long prom_dtlb_load(unsigned long index,
198 unsigned long tte_data,
199 unsigned long vaddr);
200
201/* Map/Unmap client program address ranges. First the format of
202 * the mapping mode argument.
203 */
204#define PROM_MAP_WRITE 0x0001 /* Writable */
205#define PROM_MAP_READ 0x0002 /* Readable - sw */
206#define PROM_MAP_EXEC 0x0004 /* Executable - sw */
207#define PROM_MAP_LOCKED 0x0010 /* Locked, use i/dtlb load calls for this instead */
208#define PROM_MAP_CACHED 0x0020 /* Cacheable in both L1 and L2 caches */
209#define PROM_MAP_SE 0x0040 /* Side-Effects */
210#define PROM_MAP_GLOB 0x0080 /* Global */
211#define PROM_MAP_IE 0x0100 /* Invert-Endianness */
212#define PROM_MAP_DEFAULT (PROM_MAP_WRITE | PROM_MAP_READ | PROM_MAP_EXEC | PROM_MAP_CACHED)
213
214extern int prom_map(int mode, unsigned long size,
215 unsigned long vaddr, unsigned long paddr);
216extern void prom_unmap(unsigned long size, unsigned long vaddr);
217
218
219/* PROM device tree traversal functions... */
220
221#ifdef PROMLIB_INTERNAL
222
223/* Internal version of prom_getchild. */
224extern int __prom_getchild(int parent_node);
225
226/* Internal version of prom_getsibling. */
227extern int __prom_getsibling(int node);
228
229#endif
230
231/* Get the child node of the given node, or zero if no child exists. */
232extern int prom_getchild(int parent_node);
233
234/* Get the next sibling node of the given node, or zero if no further
235 * siblings exist.
236 */
237extern int prom_getsibling(int node);
238
239/* Get the length, at the passed node, of the given property type.
240 * Returns -1 on error (ie. no such property at this node).
241 */
242extern int prom_getproplen(int thisnode, const char *property);
243
244/* Fetch the requested property using the given buffer. Returns
245 * the number of bytes the prom put into your buffer or -1 on error.
246 */
247extern int prom_getproperty(int thisnode, const char *property,
248 char *prop_buffer, int propbuf_size);
249
250/* Acquire an integer property. */
251extern int prom_getint(int node, const char *property);
252
253/* Acquire an integer property, with a default value. */
254extern int prom_getintdefault(int node, const char *property, int defval);
255
256/* Acquire a boolean property, 0=FALSE 1=TRUE. */
257extern int prom_getbool(int node, const char *prop);
258
259/* Acquire a string property, null string on error. */
260extern void prom_getstring(int node, const char *prop, char *buf, int bufsize);
261
262/* Does the passed node have the given "name"? YES=1 NO=0 */
263extern int prom_nodematch(int thisnode, const char *name);
264
265/* Search all siblings starting at the passed node for "name" matching
266 * the given string. Returns the node on success, zero on failure.
267 */
268extern int prom_searchsiblings(int node_start, const char *name);
269
270/* Return the first property type, as a string, for the given node.
271 * Returns a null string on error. Buffer should be at least 32B long.
272 */
273extern char *prom_firstprop(int node, char *buffer);
274
275/* Returns the next property after the passed property for the given
276 * node. Returns null string on failure. Buffer should be at least 32B long.
277 */
278extern char *prom_nextprop(int node, const char *prev_property, char *buffer);
279
280/* Returns 1 if the specified node has given property. */
281extern int prom_node_has_property(int node, const char *property);
282
283/* Returns phandle of the path specified */
284extern int prom_finddevice(const char *name);
285
286/* Set the indicated property at the given node with the passed value.
287 * Returns the number of bytes of your value that the prom took.
288 */
289extern int prom_setprop(int node, const char *prop_name, char *prop_value,
290 int value_size);
291
292extern int prom_pathtoinode(const char *path);
293extern int prom_inst2pkg(int);
294extern int prom_service_exists(const char *service_name);
295extern void prom_sun4v_guest_soft_state(void);
296
297extern int prom_ihandle2path(int handle, char *buffer, int bufsize);
298
299/* Client interface level routines. */
300extern long p1275_cmd(const char *, long, ...);
301
302#if 0
303#define P1275_SIZE(x) ((((long)((x) / 32)) << 32) | (x))
304#else
305#define P1275_SIZE(x) x
306#endif
307
308/* We support at most 16 input and 1 output argument */
309#define P1275_ARG_NUMBER 0
310#define P1275_ARG_IN_STRING 1
311#define P1275_ARG_OUT_BUF 2
312#define P1275_ARG_OUT_32B 3
313#define P1275_ARG_IN_FUNCTION 4
314#define P1275_ARG_IN_BUF 5
315#define P1275_ARG_IN_64B 6
316
317#define P1275_IN(x) ((x) & 0xf)
318#define P1275_OUT(x) (((x) << 4) & 0xf0)
319#define P1275_INOUT(i,o) (P1275_IN(i)|P1275_OUT(o))
320#define P1275_ARG(n,x) ((x) << ((n)*3 + 8))
321
322#endif /* !(__SPARC64_OPLIB_H) */