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Linux/arch/sparc/include/asm/oplib_32.h

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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... */
 16 extern struct linux_romvec *romvec;
 17 
 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 };
 25 
 26 extern enum prom_major_version prom_vers;
 27 /* Revision, and firmware revision. */
 28 extern unsigned int prom_rev, prom_prev;
 29 
 30 /* Root node of the prom device tree, this stays constant after
 31  * initialization is complete.
 32  */
 33 extern phandle prom_root_node;
 34 
 35 /* Pointer to prom structure containing the device tree traversal
 36  * and usage utility functions.  Only prom-lib should use these,
 37  * users use the interface defined by the library only!
 38  */
 39 extern struct linux_nodeops *prom_nodeops;
 40 
 41 /* The functions... */
 42 
 43 /* You must call prom_init() before using any of the library services,
 44  * preferably as early as possible.  Pass it the romvec pointer.
 45  */
 46 void prom_init(struct linux_romvec *rom_ptr);
 47 
 48 /* Boot argument acquisition, returns the boot command line string. */
 49 char *prom_getbootargs(void);
 50 
 51 /* Miscellaneous routines, don't really fit in any category per se. */
 52 
 53 /* Reboot the machine with the command line passed. */
 54 void prom_reboot(char *boot_command);
 55 
 56 /* Evaluate the forth string passed. */
 57 void prom_feval(char *forth_string);
 58 
 59 /* Enter the prom, with possibility of continuation with the 'go'
 60  * command in newer proms.
 61  */
 62 void prom_cmdline(void);
 63 
 64 /* Enter the prom, with no chance of continuation for the stand-alone
 65  * which calls this.
 66  */
 67 void __noreturn prom_halt(void);
 68 
 69 /* Set the PROM 'sync' callback function to the passed function pointer.
 70  * When the user gives the 'sync' command at the prom prompt while the
 71  * kernel is still active, the prom will call this routine.
 72  *
 73  * XXX The arguments are different on V0 vs. V2->higher proms, grrr! XXX
 74  */
 75 typedef void (*sync_func_t)(void);
 76 void prom_setsync(sync_func_t func_ptr);
 77 
 78 /* Acquire the IDPROM of the root node in the prom device tree.  This
 79  * gets passed a buffer where you would like it stuffed.  The return value
 80  * is the format type of this idprom or 0xff on error.
 81  */
 82 unsigned char prom_get_idprom(char *idp_buffer, int idpbuf_size);
 83 
 84 /* Get the prom major version. */
 85 int prom_version(void);
 86 
 87 /* Get the prom plugin revision. */
 88 int prom_getrev(void);
 89 
 90 /* Get the prom firmware revision. */
 91 int prom_getprev(void);
 92 
 93 /* Write a buffer of characters to the console. */
 94 void prom_console_write_buf(const char *buf, int len);
 95 
 96 /* Prom's internal routines, don't use in kernel/boot code. */
 97 __printf(1, 2) void prom_printf(const char *fmt, ...);
 98 void prom_write(const char *buf, unsigned int len);
 99 
100 /* Multiprocessor operations... */
101 
102 /* Start the CPU with the given device tree node, context table, and context
103  * at the passed program counter.
104  */
105 int prom_startcpu(int cpunode, struct linux_prom_registers *context_table,
106                   int context, char *program_counter);
107 
108 /* Initialize the memory lists based upon the prom version. */
109 void prom_meminit(void);
110 
111 /* PROM device tree traversal functions... */
112 
113 /* Get the child node of the given node, or zero if no child exists. */
114 phandle prom_getchild(phandle parent_node);
115 
116 /* Get the next sibling node of the given node, or zero if no further
117  * siblings exist.
118  */
119 phandle prom_getsibling(phandle node);
120 
121 /* Get the length, at the passed node, of the given property type.
122  * Returns -1 on error (ie. no such property at this node).
123  */
124 int prom_getproplen(phandle thisnode, const char *property);
125 
126 /* Fetch the requested property using the given buffer.  Returns
127  * the number of bytes the prom put into your buffer or -1 on error.
128  */
129 int __must_check prom_getproperty(phandle thisnode, const char *property,
130                                   char *prop_buffer, int propbuf_size);
131 
132 /* Acquire an integer property. */
133 int prom_getint(phandle node, char *property);
134 
135 /* Acquire an integer property, with a default value. */
136 int prom_getintdefault(phandle node, char *property, int defval);
137 
138 /* Acquire a boolean property, 0=FALSE 1=TRUE. */
139 int prom_getbool(phandle node, char *prop);
140 
141 /* Acquire a string property, null string on error. */
142 void prom_getstring(phandle node, char *prop, char *buf, int bufsize);
143 
144 /* Search all siblings starting at the passed node for "name" matching
145  * the given string.  Returns the node on success, zero on failure.
146  */
147 phandle prom_searchsiblings(phandle node_start, char *name);
148 
149 /* Returns the next property after the passed property for the given
150  * node.  Returns null string on failure.
151  */
152 char *prom_nextprop(phandle node, char *prev_property, char *buffer);
153 
154 /* Returns phandle of the path specified */
155 phandle prom_finddevice(char *name);
156 
157 /* Set the indicated property at the given node with the passed value.
158  * Returns the number of bytes of your value that the prom took.
159  */
160 int prom_setprop(phandle node, const char *prop_name, char *prop_value,
161                  int value_size);
162 
163 phandle prom_inst2pkg(int);
164 
165 /* Dorking with Bus ranges... */
166 
167 /* Apply promlib probes OBIO ranges to registers. */
168 void prom_apply_obio_ranges(struct linux_prom_registers *obioregs, int nregs);
169 
170 /* Apply ranges of any prom node (and optionally parent node as well) to registers. */
171 void prom_apply_generic_ranges(phandle node, phandle parent,
172                                struct linux_prom_registers *sbusregs, int nregs);
173 
174 void prom_ranges_init(void);
175 
176 /* CPU probing helpers.  */
177 int cpu_find_by_instance(int instance, phandle *prom_node, int *mid);
178 int cpu_find_by_mid(int mid, phandle *prom_node);
179 int cpu_get_hwmid(phandle prom_node);
180 
181 extern spinlock_t prom_lock;
182 
183 #endif /* !(__SPARC_OPLIB_H) */
184 

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