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

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  1 /* SPDX-License-Identifier: GPL-2.0 */
  2 /*
  3  * oplib.h:  Describes the interface and available routines in the
  4  *           Linux Prom library.
  5  *
  6  * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
  7  */
  8 
  9 #ifndef __SPARC_OPLIB_H
 10 #define __SPARC_OPLIB_H
 11 
 12 #include <asm/openprom.h>
 13 #include <linux/spinlock.h>
 14 #include <linux/compiler.h>
 15 
 16 /* The master romvec pointer... */
 17 extern struct linux_romvec *romvec;
 18 
 19 /* Enumeration to describe the prom major version we have detected. */
 20 enum prom_major_version {
 21         PROM_V0,      /* Original sun4c V0 prom */
 22         PROM_V2,      /* sun4c and early sun4m V2 prom */
 23         PROM_V3,      /* sun4m and later, up to sun4d/sun4e machines V3 */
 24         PROM_P1275,   /* IEEE compliant ISA based Sun PROM, only sun4u */
 25 };
 26 
 27 extern enum prom_major_version prom_vers;
 28 /* Revision, and firmware revision. */
 29 extern unsigned int prom_rev, prom_prev;
 30 
 31 /* Root node of the prom device tree, this stays constant after
 32  * initialization is complete.
 33  */
 34 extern phandle 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  */
 40 extern 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  */
 47 void prom_init(struct linux_romvec *rom_ptr);
 48 
 49 /* Boot argument acquisition, returns the boot command line string. */
 50 char *prom_getbootargs(void);
 51 
 52 /* Miscellaneous routines, don't really fit in any category per se. */
 53 
 54 /* Reboot the machine with the command line passed. */
 55 void prom_reboot(char *boot_command);
 56 
 57 /* Evaluate the forth string passed. */
 58 void prom_feval(char *forth_string);
 59 
 60 /* Enter the prom, with possibility of continuation with the 'go'
 61  * command in newer proms.
 62  */
 63 void prom_cmdline(void);
 64 
 65 /* Enter the prom, with no chance of continuation for the stand-alone
 66  * which calls this.
 67  */
 68 void __noreturn prom_halt(void);
 69 
 70 /* Set the PROM 'sync' callback function to the passed function pointer.
 71  * When the user gives the 'sync' command at the prom prompt while the
 72  * kernel is still active, the prom will call this routine.
 73  *
 74  * XXX The arguments are different on V0 vs. V2->higher proms, grrr! XXX
 75  */
 76 typedef void (*sync_func_t)(void);
 77 void prom_setsync(sync_func_t func_ptr);
 78 
 79 /* Acquire the IDPROM of the root node in the prom device tree.  This
 80  * gets passed a buffer where you would like it stuffed.  The return value
 81  * is the format type of this idprom or 0xff on error.
 82  */
 83 unsigned char prom_get_idprom(char *idp_buffer, int idpbuf_size);
 84 
 85 /* Get the prom major version. */
 86 int prom_version(void);
 87 
 88 /* Get the prom plugin revision. */
 89 int prom_getrev(void);
 90 
 91 /* Get the prom firmware revision. */
 92 int prom_getprev(void);
 93 
 94 /* Write a buffer of characters to the console. */
 95 void prom_console_write_buf(const char *buf, int len);
 96 
 97 /* Prom's internal routines, don't use in kernel/boot code. */
 98 __printf(1, 2) void prom_printf(const char *fmt, ...);
 99 void prom_write(const char *buf, unsigned int len);
100 
101 /* Multiprocessor operations... */
102 
103 /* Start the CPU with the given device tree node, context table, and context
104  * at the passed program counter.
105  */
106 int prom_startcpu(int cpunode, struct linux_prom_registers *context_table,
107                   int context, char *program_counter);
108 
109 /* Initialize the memory lists based upon the prom version. */
110 void prom_meminit(void);
111 
112 /* PROM device tree traversal functions... */
113 
114 /* Get the child node of the given node, or zero if no child exists. */
115 phandle prom_getchild(phandle parent_node);
116 
117 /* Get the next sibling node of the given node, or zero if no further
118  * siblings exist.
119  */
120 phandle prom_getsibling(phandle node);
121 
122 /* Get the length, at the passed node, of the given property type.
123  * Returns -1 on error (ie. no such property at this node).
124  */
125 int prom_getproplen(phandle thisnode, const char *property);
126 
127 /* Fetch the requested property using the given buffer.  Returns
128  * the number of bytes the prom put into your buffer or -1 on error.
129  */
130 int __must_check prom_getproperty(phandle thisnode, const char *property,
131                                   char *prop_buffer, int propbuf_size);
132 
133 /* Acquire an integer property. */
134 int prom_getint(phandle node, char *property);
135 
136 /* Acquire an integer property, with a default value. */
137 int prom_getintdefault(phandle node, char *property, int defval);
138 
139 /* Acquire a boolean property, 0=FALSE 1=TRUE. */
140 int prom_getbool(phandle node, char *prop);
141 
142 /* Acquire a string property, null string on error. */
143 void prom_getstring(phandle node, char *prop, char *buf, int bufsize);
144 
145 /* Search all siblings starting at the passed node for "name" matching
146  * the given string.  Returns the node on success, zero on failure.
147  */
148 phandle prom_searchsiblings(phandle node_start, char *name);
149 
150 /* Returns the next property after the passed property for the given
151  * node.  Returns null string on failure.
152  */
153 char *prom_nextprop(phandle node, char *prev_property, char *buffer);
154 
155 /* Returns phandle of the path specified */
156 phandle prom_finddevice(char *name);
157 
158 /* Set the indicated property at the given node with the passed value.
159  * Returns the number of bytes of your value that the prom took.
160  */
161 int prom_setprop(phandle node, const char *prop_name, char *prop_value,
162                  int value_size);
163 
164 phandle prom_inst2pkg(int);
165 
166 /* Dorking with Bus ranges... */
167 
168 /* Apply promlib probes OBIO ranges to registers. */
169 void prom_apply_obio_ranges(struct linux_prom_registers *obioregs, int nregs);
170 
171 /* Apply ranges of any prom node (and optionally parent node as well) to registers. */
172 void prom_apply_generic_ranges(phandle node, phandle parent,
173                                struct linux_prom_registers *sbusregs, int nregs);
174 
175 void prom_ranges_init(void);
176 
177 /* CPU probing helpers.  */
178 int cpu_find_by_instance(int instance, phandle *prom_node, int *mid);
179 int cpu_find_by_mid(int mid, phandle *prom_node);
180 int cpu_get_hwmid(phandle prom_node);
181 
182 extern spinlock_t prom_lock;
183 
184 #endif /* !(__SPARC_OPLIB_H) */
185 

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