192 lines
6.3 KiB
C
192 lines
6.3 KiB
C
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/*
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* oplib.h: Describes the interface and available routines in the
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* Linux Prom library.
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*
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* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
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*/
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#ifndef __SPARC_OPLIB_H
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#define __SPARC_OPLIB_H
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#include <asm/openprom.h>
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#include <linux/spinlock.h>
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#include <linux/compiler.h>
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/* The master romvec pointer... */
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extern struct linux_romvec *romvec;
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/* Enumeration to describe the prom major version we have detected. */
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enum prom_major_version {
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PROM_V0, /* Original sun4c V0 prom */
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PROM_V2, /* sun4c and early sun4m V2 prom */
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PROM_V3, /* sun4m and later, up to sun4d/sun4e machines V3 */
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PROM_P1275, /* IEEE compliant ISA based Sun PROM, only sun4u */
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};
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extern enum prom_major_version prom_vers;
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/* Revision, and firmware revision. */
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extern unsigned int prom_rev, prom_prev;
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/* Root node of the prom device tree, this stays constant after
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* initialization is complete.
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*/
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extern phandle prom_root_node;
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/* Pointer to prom structure containing the device tree traversal
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* and usage utility functions. Only prom-lib should use these,
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* users use the interface defined by the library only!
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*/
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extern struct linux_nodeops *prom_nodeops;
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/* The functions... */
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/* You must call prom_init() before using any of the library services,
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* preferably as early as possible. Pass it the romvec pointer.
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*/
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extern void prom_init(struct linux_romvec *rom_ptr);
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/* Boot argument acquisition, returns the boot command line string. */
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extern char *prom_getbootargs(void);
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/* Miscellaneous routines, don't really fit in any category per se. */
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/* Reboot the machine with the command line passed. */
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extern void prom_reboot(char *boot_command);
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/* Evaluate the forth string passed. */
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extern void prom_feval(char *forth_string);
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/* Enter the prom, with possibility of continuation with the 'go'
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* command in newer proms.
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*/
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extern void prom_cmdline(void);
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/* Enter the prom, with no chance of continuation for the stand-alone
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* which calls this.
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*/
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extern void __noreturn prom_halt(void);
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/* Set the PROM 'sync' callback function to the passed function pointer.
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* When the user gives the 'sync' command at the prom prompt while the
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* kernel is still active, the prom will call this routine.
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*
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* XXX The arguments are different on V0 vs. V2->higher proms, grrr! XXX
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*/
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typedef void (*sync_func_t)(void);
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extern void prom_setsync(sync_func_t func_ptr);
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/* Acquire the IDPROM of the root node in the prom device tree. This
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* gets passed a buffer where you would like it stuffed. The return value
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* is the format type of this idprom or 0xff on error.
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*/
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extern unsigned char prom_get_idprom(char *idp_buffer, int idpbuf_size);
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/* Get the prom major version. */
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extern int prom_version(void);
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/* Get the prom plugin revision. */
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extern int prom_getrev(void);
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/* Get the prom firmware revision. */
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extern int prom_getprev(void);
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/* Write a buffer of characters to the console. */
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extern void prom_console_write_buf(const char *buf, int len);
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/* Prom's internal routines, don't use in kernel/boot code. */
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extern void prom_printf(const char *fmt, ...);
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extern void prom_write(const char *buf, unsigned int len);
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/* Multiprocessor operations... */
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/* Start the CPU with the given device tree node, context table, and context
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* at the passed program counter.
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*/
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extern int prom_startcpu(int cpunode, struct linux_prom_registers *context_table,
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int context, char *program_counter);
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/* Sun4/sun4c specific memory-management startup hook. */
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/* Map the passed segment in the given context at the passed
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* virtual address.
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*/
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extern void prom_putsegment(int context, unsigned long virt_addr,
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int physical_segment);
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/* Initialize the memory lists based upon the prom version. */
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void prom_meminit(void);
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/* PROM device tree traversal functions... */
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/* Get the child node of the given node, or zero if no child exists. */
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extern phandle prom_getchild(phandle parent_node);
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/* Get the next sibling node of the given node, or zero if no further
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* siblings exist.
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*/
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extern phandle prom_getsibling(phandle node);
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/* Get the length, at the passed node, of the given property type.
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* Returns -1 on error (ie. no such property at this node).
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*/
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extern int prom_getproplen(phandle thisnode, const char *property);
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/* Fetch the requested property using the given buffer. Returns
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* the number of bytes the prom put into your buffer or -1 on error.
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*/
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extern int __must_check prom_getproperty(phandle thisnode, const char *property,
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char *prop_buffer, int propbuf_size);
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/* Acquire an integer property. */
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extern int prom_getint(phandle node, char *property);
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/* Acquire an integer property, with a default value. */
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extern int prom_getintdefault(phandle node, char *property, int defval);
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/* Acquire a boolean property, 0=FALSE 1=TRUE. */
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extern int prom_getbool(phandle node, char *prop);
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/* Acquire a string property, null string on error. */
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extern void prom_getstring(phandle node, char *prop, char *buf, int bufsize);
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/* Search all siblings starting at the passed node for "name" matching
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* the given string. Returns the node on success, zero on failure.
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*/
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extern phandle prom_searchsiblings(phandle node_start, char *name);
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/* Returns the next property after the passed property for the given
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* node. Returns null string on failure.
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*/
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extern char *prom_nextprop(phandle node, char *prev_property, char *buffer);
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/* Returns phandle of the path specified */
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extern phandle prom_finddevice(char *name);
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/* Set the indicated property at the given node with the passed value.
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* Returns the number of bytes of your value that the prom took.
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*/
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extern int prom_setprop(phandle node, const char *prop_name, char *prop_value,
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int value_size);
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extern phandle prom_inst2pkg(int);
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/* Dorking with Bus ranges... */
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/* Apply promlib probes OBIO ranges to registers. */
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extern void prom_apply_obio_ranges(struct linux_prom_registers *obioregs, int nregs);
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/* Apply ranges of any prom node (and optionally parent node as well) to registers. */
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extern void prom_apply_generic_ranges(phandle node, phandle parent,
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struct linux_prom_registers *sbusregs, int nregs);
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void prom_ranges_init(void);
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/* CPU probing helpers. */
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int cpu_find_by_instance(int instance, phandle *prom_node, int *mid);
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int cpu_find_by_mid(int mid, phandle *prom_node);
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int cpu_get_hwmid(phandle prom_node);
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extern spinlock_t prom_lock;
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#endif /* !(__SPARC_OPLIB_H) */
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