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 13 /* The master romvec pointer... */ 14 extern struct linux_romvec *romvec; 15 16 /* Enumeration to describe the prom major version we have detected. */ 17 enum prom_major_version { 18 PROM_V0, /* Original sun4c V0 prom */ 19 PROM_V2, /* sun4c and early sun4m V2 prom */ 20 PROM_V3, /* sun4m and later, up to sun4d/sun4e machines V3 */ 21 PROM_P1275, /* IEEE compliant ISA based Sun PROM, only sun4u */ 22 }; 23 24 extern enum prom_major_version prom_vers; 25 /* Revision, and firmware revision. */ 26 extern unsigned int prom_rev, prom_prev; 27 28 /* Root node of the prom device tree, this stays constant after 29 * initialization is complete. 30 */ 31 extern int prom_root_node; 32 33 /* Pointer to prom structure containing the device tree traversal 34 * and usage utility functions. Only prom-lib should use these, 35 * users use the interface defined by the library only! 36 */ 37 extern struct linux_nodeops *prom_nodeops; 38 39 /* The functions... */ 40 41 /* You must call prom_init() before using any of the library services, 42 * preferably as early as possible. Pass it the romvec pointer. 43 */ 44 extern void prom_init(struct linux_romvec *rom_ptr); 45 46 /* Boot argument acquisition, returns the boot command line string. */ 47 extern char *prom_getbootargs(void); 48 49 /* Device utilities. */ 50 51 /* Map and unmap devices in IO space at virtual addresses. Note that the 52 * virtual address you pass is a request and the prom may put your mappings 53 * somewhere else, so check your return value as that is where your new 54 * mappings really are! 55 * 56 * Another note, these are only available on V2 or higher proms! 57 */ 58 extern char *prom_mapio(char *virt_hint, int io_space, unsigned int phys_addr, unsigned int num_bytes); 59 extern void prom_unmapio(char *virt_addr, unsigned int num_bytes); 60 61 /* Device operations. */ 62 63 /* Open the device described by the passed string. Note, that the format 64 * of the string is different on V0 vs. V2->higher proms. The caller must 65 * know what he/she is doing! Returns the device descriptor, an int. 66 */ 67 extern int prom_devopen(char *device_string); 68 69 /* Close a previously opened device described by the passed integer 70 * descriptor. 71 */ 72 extern int prom_devclose(int device_handle); 73 74 /* Do a seek operation on the device described by the passed integer 75 * descriptor. 76 */ 77 extern void prom_seek(int device_handle, unsigned int seek_hival, 78 unsigned int seek_lowval); 79 80 /* Machine memory configuration routine. */ 81 82 /* This function returns a V0 format memory descriptor table, it has three 83 * entries. One for the total amount of physical ram on the machine, one 84 * for the amount of physical ram available, and one describing the virtual 85 * areas which are allocated by the prom. So, in a sense the physical 86 * available is a calculation of the total physical minus the physical mapped 87 * by the prom with virtual mappings. 88 * 89 * These lists are returned pre-sorted, this should make your life easier 90 * since the prom itself is way too lazy to do such nice things. 91 */ 92 extern struct linux_mem_v0 *prom_meminfo(void); 93 94 /* Miscellaneous routines, don't really fit in any category per se. */ 95 96 /* Reboot the machine with the command line passed. */ 97 extern void prom_reboot(char *boot_command); 98 99 /* Evaluate the forth string passed. */ 100 extern void prom_feval(char *forth_string); 101 102 /* Enter the prom, with possibility of continuation with the 'go' 103 * command in newer proms. 104 */ 105 extern void prom_cmdline(void); 106 107 /* Enter the prom, with no chance of continuation for the stand-alone 108 * which calls this. 109 */ 110 extern void prom_halt(void); 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 * XXX The arguments are different on V0 vs. V2->higher proms, grrr! XXX 117 */ 118 typedef void (*sync_func_t)(void); 119 extern void prom_setsync(sync_func_t func_ptr); 120 121 /* Acquire the IDPROM of the root node in the prom device tree. This 122 * gets passed a buffer where you would like it stuffed. The return value 123 * is the format type of this idprom or 0xff on error. 124 */ 125 extern unsigned char prom_get_idprom(char *idp_buffer, int idpbuf_size); 126 127 /* Get the prom major version. */ 128 extern int prom_version(void); 129 130 /* Get the prom plugin revision. */ 131 extern int prom_getrev(void); 132 133 /* Get the prom firmware revision. */ 134 extern int prom_getprev(void); 135 136 /* Character operations to/from the console.... */ 137 138 /* Non-blocking get character from console. */ 139 extern int prom_nbgetchar(void); 140 141 /* Non-blocking put character to console. */ 142 extern int prom_nbputchar(char character); 143 144 /* Blocking get character from console. */ 145 extern char prom_getchar(void); 146 147 /* Blocking put character to console. */ 148 extern void prom_putchar(char character); 149 150 /* Prom's internal printf routine, don't use in kernel/boot code. */ 151 void prom_printf(char *fmt, ...); 152 153 /* Query for input device type */ 154 155 enum prom_input_device { 156 PROMDEV_IKBD, /* input from keyboard */ 157 PROMDEV_ITTYA, /* input from ttya */ 158 PROMDEV_ITTYB, /* input from ttyb */ 159 PROMDEV_I_UNK, 160 }; 161 162 extern enum prom_input_device prom_query_input_device(void); 163 164 /* Query for output device type */ 165 166 enum prom_output_device { 167 PROMDEV_OSCREEN, /* to screen */ 168 PROMDEV_OTTYA, /* to ttya */ 169 PROMDEV_OTTYB, /* to ttyb */ 170 PROMDEV_O_UNK, 171 }; 172 173 extern enum prom_output_device prom_query_output_device(void); 174 175 /* Multiprocessor operations... */ 176 177 /* Start the CPU with the given device tree node, context table, and context 178 * at the passed program counter. 179 */ 180 extern int prom_startcpu(int cpunode, struct linux_prom_registers *context_table, 181 int context, char *program_counter); 182 183 /* Stop the CPU with the passed device tree node. */ 184 extern int prom_stopcpu(int cpunode); 185 186 /* Idle the CPU with the passed device tree node. */ 187 extern int prom_idlecpu(int cpunode); 188 189 /* Re-Start the CPU with the passed device tree node. */ 190 extern int prom_restartcpu(int cpunode); 191 192 /* PROM memory allocation facilities... */ 193 194 /* Allocated at possibly the given virtual address a chunk of the 195 * indicated size. 196 */ 197 extern char *prom_alloc(char *virt_hint, unsigned int size); 198 199 /* Free a previously allocated chunk. */ 200 extern void prom_free(char *virt_addr, unsigned int size); 201 202 /* Sun4/sun4c specific memory-management startup hook. */ 203 204 /* Map the passed segment in the given context at the passed 205 * virtual address. 206 */ 207 extern void prom_putsegment(int context, unsigned long virt_addr, 208 int physical_segment); 209 210 /* PROM device tree traversal functions... */ 211 212 /* Get the child node of the given node, or zero if no child exists. */ 213 extern int prom_getchild(int parent_node); 214 215 /* Get the next sibling node of the given node, or zero if no further 216 * siblings exist. 217 */ 218 extern int prom_getsibling(int node); 219 220 /* Get the length, at the passed node, of the given property type. 221 * Returns -1 on error (ie. no such property at this node). 222 */ 223 extern int prom_getproplen(int thisnode, char *property); 224 225 /* Fetch the requested property using the given buffer. Returns 226 * the number of bytes the prom put into your buffer or -1 on error. 227 */ 228 extern int prom_getproperty(int thisnode, char *property, 229 char *prop_buffer, int propbuf_size); 230 231 /* Acquire an integer property. */ 232 extern int prom_getint(int node, char *property); 233 234 /* Acquire an integer property, with a default value. */ 235 extern int prom_getintdefault(int node, char *property, int defval); 236 237 /* Acquire a boolean property, 0=FALSE 1=TRUE. */ 238 extern int prom_getbool(int node, char *prop); 239 240 /* Acquire a string property, null string on error. */ 241 extern void prom_getstring(int node, char *prop, char *buf, int bufsize); 242 243 /* Does the passed node have the given "name"? YES=1 NO=0 */ 244 extern int prom_nodematch(int thisnode, char *name); 245 246 /* Search all siblings starting at the passed node for "name" matching 247 * the given string. Returns the node on success, zero on failure. 248 */ 249 extern int prom_searchsiblings(int node_start, char *name); 250 251 /* Return the first property type, as a string, for the given node. 252 * Returns a null string on error. 253 */ 254 extern char *prom_firstprop(int node); 255 256 /* Returns the next property after the passed property for the given 257 * node. Returns null string on failure. 258 */ 259 extern char *prom_nextprop(int node, char *prev_property); 260 261 /* Returns 1 if the specified node has given property. */ 262 extern int prom_node_has_property(int node, char *property); 263 264 /* Set the indicated property at the given node with the passed value. 265 * Returns the number of bytes of your value that the prom took. 266 */ 267 extern int prom_setprop(int node, char *prop_name, char *prop_value, 268 int value_size); 269 270 extern int prom_pathtoinode(char *path); 271 extern int prom_inst2pkg(int); 272 273 /* Dorking with Bus ranges... */ 274 275 /* Adjust reg values with the passed ranges. */ 276 extern void prom_adjust_regs(struct linux_prom_registers *regp, int nregs, 277 struct linux_prom_ranges *rangep, int nranges); 278 279 /* Adjust child ranges with the passed parent ranges. */ 280 extern void prom_adjust_ranges(struct linux_prom_ranges *cranges, int ncranges, 281 struct linux_prom_ranges *pranges, int npranges); 282 283 /* Apply promlib probed OBIO ranges to registers. */ 284 extern void prom_apply_obio_ranges(struct linux_prom_registers *obioregs, int nregs); 285 286 /* Apply ranges of any prom node (and optionally parent node as well) to registers. */ 287 extern void prom_apply_generic_ranges(int node, int parent, 288 struct linux_prom_registers *sbusregs, int nregs); 289 290 291 #endif /* !(__SPARC_OPLIB_H) */ 292