1 /* $Id: oplib.h,v 1.14 2001/12/19 00:29:51 davem Exp $
2 * oplib.h: Describes the interface and available routines in the
5 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
6 * Copyright (C) 1996 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
9 #ifndef __SPARC64_OPLIB_H
10 #define __SPARC64_OPLIB_H
12 #include <asm/openprom.h>
14 /* OBP version string. */
15 extern char prom_version[];
17 /* Root node of the prom device tree, this stays constant after
18 * initialization is complete.
20 extern int prom_root_node;
22 /* PROM stdin and stdout */
23 extern int prom_stdin, prom_stdout;
25 /* /chosen node of the prom device tree, this stays constant after
26 * initialization is complete.
28 extern int prom_chosen_node;
30 /* Helper values and strings in arch/sparc64/kernel/head.S */
31 extern const char prom_peer_name[];
32 extern const char prom_compatible_name[];
33 extern const char prom_root_compatible[];
34 extern const char prom_finddev_name[];
35 extern const char prom_chosen_path[];
36 extern const char prom_getprop_name[];
37 extern const char prom_mmu_name[];
38 extern const char prom_callmethod_name[];
39 extern const char prom_translate_name[];
40 extern const char prom_map_name[];
41 extern const char prom_unmap_name[];
42 extern int prom_mmu_ihandle_cache;
43 extern unsigned int prom_boot_mapped_pc;
44 extern unsigned int prom_boot_mapping_mode;
45 extern unsigned long prom_boot_mapping_phys_high, prom_boot_mapping_phys_low;
47 struct linux_mlist_p1275 {
48 struct linux_mlist_p1275 *theres_more;
49 unsigned long start_adr;
50 unsigned long num_bytes;
53 struct linux_mem_p1275 {
54 struct linux_mlist_p1275 **p1275_totphys;
55 struct linux_mlist_p1275 **p1275_prommap;
56 struct linux_mlist_p1275 **p1275_available; /* What we can use */
59 /* The functions... */
61 /* You must call prom_init() before using any of the library services,
62 * preferably as early as possible. Pass it the romvec pointer.
64 extern void prom_init(void *cif_handler, void *cif_stack);
66 /* Boot argument acquisition, returns the boot command line string. */
67 extern char *prom_getbootargs(void);
69 /* Device utilities. */
71 /* Device operations. */
73 /* Open the device described by the passed string. Note, that the format
74 * of the string is different on V0 vs. V2->higher proms. The caller must
75 * know what he/she is doing! Returns the device descriptor, an int.
77 extern int prom_devopen(const char *device_string);
79 /* Close a previously opened device described by the passed integer
82 extern int prom_devclose(int device_handle);
84 /* Do a seek operation on the device described by the passed integer
87 extern void prom_seek(int device_handle, unsigned int seek_hival,
88 unsigned int seek_lowval);
90 /* Miscellaneous routines, don't really fit in any category per se. */
92 /* Reboot the machine with the command line passed. */
93 extern void prom_reboot(const char *boot_command);
95 /* Evaluate the forth string passed. */
96 extern void prom_feval(const char *forth_string);
98 /* Enter the prom, with possibility of continuation with the 'go'
99 * command in newer proms.
101 extern void prom_cmdline(void);
103 /* Enter the prom, with no chance of continuation for the stand-alone
106 extern void prom_halt(void) __attribute__ ((noreturn));
108 /* Halt and power-off the machine. */
109 extern void prom_halt_power_off(void) __attribute__ ((noreturn));
111 /* Set the PROM 'sync' callback function to the passed function pointer.
112 * When the user gives the 'sync' command at the prom prompt while the
113 * kernel is still active, the prom will call this routine.
116 typedef int (*callback_func_t)(long *cmd);
117 extern void prom_setcallback(callback_func_t func_ptr);
119 /* Acquire the IDPROM of the root node in the prom device tree. This
120 * gets passed a buffer where you would like it stuffed. The return value
121 * is the format type of this idprom or 0xff on error.
123 extern unsigned char prom_get_idprom(char *idp_buffer, int idpbuf_size);
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(const char *fmt, ...);
141 extern void prom_write(const char *buf, unsigned int len);
143 /* Query for input device type */
145 enum prom_input_device {
146 PROMDEV_IKBD, /* input from keyboard */
147 PROMDEV_ITTYA, /* input from ttya */
148 PROMDEV_ITTYB, /* input from ttyb */
149 PROMDEV_IRSC, /* input from rsc */
150 PROMDEV_IVCONS, /* input from virtual-console */
154 extern enum prom_input_device prom_query_input_device(void);
156 /* Query for output device type */
158 enum prom_output_device {
159 PROMDEV_OSCREEN, /* to screen */
160 PROMDEV_OTTYA, /* to ttya */
161 PROMDEV_OTTYB, /* to ttyb */
162 PROMDEV_ORSC, /* to rsc */
163 PROMDEV_OVCONS, /* to virtual-console */
167 extern enum prom_output_device prom_query_output_device(void);
169 /* Multiprocessor operations... */
171 /* Start the CPU with the given device tree node at the passed program
172 * counter with the given arg passed in via register %o0.
174 extern void prom_startcpu(int cpunode, unsigned long pc, unsigned long arg);
176 /* Start the CPU with the given cpu ID at the passed program
177 * counter with the given arg passed in via register %o0.
179 extern void prom_startcpu_cpuid(int cpuid, unsigned long pc, unsigned long arg);
181 /* Stop the CPU with the given cpu ID. */
182 extern void prom_stopcpu_cpuid(int cpuid);
184 /* Stop the current CPU. */
185 extern void prom_stopself(void);
187 /* Idle the current CPU. */
188 extern void prom_idleself(void);
190 /* Resume the CPU with the passed device tree node. */
191 extern void prom_resumecpu(int cpunode);
194 /* Power management interfaces. */
196 /* Put the current CPU to sleep. */
197 extern void prom_sleepself(void);
199 /* Put the entire system to sleep. */
200 extern int prom_sleepsystem(void);
202 /* Initiate a wakeup event. */
203 extern int prom_wakeupsystem(void);
205 /* MMU and memory related OBP interfaces. */
207 /* Get unique string identifying SIMM at given physical address. */
208 extern int prom_getunumber(int syndrome_code,
209 unsigned long phys_addr,
210 char *buf, int buflen);
212 /* Retain physical memory to the caller across soft resets. */
213 extern unsigned long prom_retain(const char *name,
214 unsigned long pa_low, unsigned long pa_high,
215 long size, long align);
217 /* Load explicit I/D TLB entries into the calling processor. */
218 extern long prom_itlb_load(unsigned long index,
219 unsigned long tte_data,
220 unsigned long vaddr);
222 extern long prom_dtlb_load(unsigned long index,
223 unsigned long tte_data,
224 unsigned long vaddr);
226 /* Map/Unmap client program address ranges. First the format of
227 * the mapping mode argument.
229 #define PROM_MAP_WRITE 0x0001 /* Writable */
230 #define PROM_MAP_READ 0x0002 /* Readable - sw */
231 #define PROM_MAP_EXEC 0x0004 /* Executable - sw */
232 #define PROM_MAP_LOCKED 0x0010 /* Locked, use i/dtlb load calls for this instead */
233 #define PROM_MAP_CACHED 0x0020 /* Cacheable in both L1 and L2 caches */
234 #define PROM_MAP_SE 0x0040 /* Side-Effects */
235 #define PROM_MAP_GLOB 0x0080 /* Global */
236 #define PROM_MAP_IE 0x0100 /* Invert-Endianness */
237 #define PROM_MAP_DEFAULT (PROM_MAP_WRITE | PROM_MAP_READ | PROM_MAP_EXEC | PROM_MAP_CACHED)
239 extern int prom_map(int mode, unsigned long size,
240 unsigned long vaddr, unsigned long paddr);
241 extern void prom_unmap(unsigned long size, unsigned long vaddr);
244 /* PROM device tree traversal functions... */
246 #ifdef PROMLIB_INTERNAL
248 /* Internal version of prom_getchild. */
249 extern int __prom_getchild(int parent_node);
251 /* Internal version of prom_getsibling. */
252 extern int __prom_getsibling(int node);
256 /* Get the child node of the given node, or zero if no child exists. */
257 extern int prom_getchild(int parent_node);
259 /* Get the next sibling node of the given node, or zero if no further
262 extern int prom_getsibling(int node);
264 /* Get the length, at the passed node, of the given property type.
265 * Returns -1 on error (ie. no such property at this node).
267 extern int prom_getproplen(int thisnode, const char *property);
269 /* Fetch the requested property using the given buffer. Returns
270 * the number of bytes the prom put into your buffer or -1 on error.
272 extern int prom_getproperty(int thisnode, const char *property,
273 char *prop_buffer, int propbuf_size);
275 /* Acquire an integer property. */
276 extern int prom_getint(int node, const char *property);
278 /* Acquire an integer property, with a default value. */
279 extern int prom_getintdefault(int node, const char *property, int defval);
281 /* Acquire a boolean property, 0=FALSE 1=TRUE. */
282 extern int prom_getbool(int node, const char *prop);
284 /* Acquire a string property, null string on error. */
285 extern void prom_getstring(int node, const char *prop, char *buf, int bufsize);
287 /* Does the passed node have the given "name"? YES=1 NO=0 */
288 extern int prom_nodematch(int thisnode, const char *name);
290 /* Puts in buffer a prom name in the form name@x,y or name (x for which_io
291 * and y for first regs phys address
293 extern int prom_getname(int node, char *buf, int buflen);
295 /* Search all siblings starting at the passed node for "name" matching
296 * the given string. Returns the node on success, zero on failure.
298 extern int prom_searchsiblings(int node_start, const char *name);
300 /* Return the first property type, as a string, for the given node.
301 * Returns a null string on error. Buffer should be at least 32B long.
303 extern char *prom_firstprop(int node, char *buffer);
305 /* Returns the next property after the passed property for the given
306 * node. Returns null string on failure. Buffer should be at least 32B long.
308 extern char *prom_nextprop(int node, const char *prev_property, char *buffer);
310 /* Returns 1 if the specified node has given property. */
311 extern int prom_node_has_property(int node, const char *property);
313 /* Returns phandle of the path specified */
314 extern int prom_finddevice(const char *name);
316 /* Set the indicated property at the given node with the passed value.
317 * Returns the number of bytes of your value that the prom took.
319 extern int prom_setprop(int node, const char *prop_name, char *prop_value,
322 extern int prom_pathtoinode(const char *path);
323 extern int prom_inst2pkg(int);
325 /* CPU probing helpers. */
327 int cpu_find_by_instance(int instance, struct device_node **dev_node, int *mid);
328 int cpu_find_by_mid(int mid, struct device_node **prom_node);
330 /* Client interface level routines. */
331 extern void prom_set_trap_table(unsigned long tba);
332 extern void prom_set_trap_table_sun4v(unsigned long tba, unsigned long mmfsa);
334 extern long p1275_cmd(const char *, long, ...);
338 #define P1275_SIZE(x) ((((long)((x) / 32)) << 32) | (x))
340 #define P1275_SIZE(x) x
343 /* We support at most 16 input and 1 output argument */
344 #define P1275_ARG_NUMBER 0
345 #define P1275_ARG_IN_STRING 1
346 #define P1275_ARG_OUT_BUF 2
347 #define P1275_ARG_OUT_32B 3
348 #define P1275_ARG_IN_FUNCTION 4
349 #define P1275_ARG_IN_BUF 5
350 #define P1275_ARG_IN_64B 6
352 #define P1275_IN(x) ((x) & 0xf)
353 #define P1275_OUT(x) (((x) << 4) & 0xf0)
354 #define P1275_INOUT(i,o) (P1275_IN(i)|P1275_OUT(o))
355 #define P1275_ARG(n,x) ((x) << ((n)*3 + 8))
357 #endif /* !(__SPARC64_OPLIB_H) */