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/* SPDX-License-Identifier: GPL-2.0 */
* oplib.h: Describes the interface and available routines in the
* Linux Prom library.
* Copyright (C) 1995 David S. Miller (
#ifndef __SPARC_OPLIB_H
#define __SPARC_OPLIB_H
#include <asm/openprom.h>
#include <linux/spinlock.h>
#include <linux/compiler.h>
/* The master romvec pointer... */
extern struct linux_romvec *romvec;
/* Enumeration to describe the prom major version we have detected. */
enum prom_major_version {
PROM_V0, /* Original sun4c V0 prom */
PROM_V2, /* sun4c and early sun4m V2 prom */
PROM_V3, /* sun4m and later, up to sun4d/sun4e machines V3 */
PROM_P1275, /* IEEE compliant ISA based Sun PROM, only sun4u */
extern enum prom_major_version prom_vers;
/* Revision, and firmware revision. */
extern unsigned int prom_rev, prom_prev;
/* Root node of the prom device tree, this stays constant after
* initialization is complete.
extern phandle prom_root_node;
/* Pointer to prom structure containing the device tree traversal
* and usage utility functions. Only prom-lib should use these,
* users use the interface defined by the library only!
extern struct linux_nodeops *prom_nodeops;
/* The functions... */
/* You must call prom_init() before using any of the library services,
* preferably as early as possible. Pass it the romvec pointer.
void prom_init(struct linux_romvec *rom_ptr);
/* Boot argument acquisition, returns the boot command line string. */
char *prom_getbootargs(void);
/* Miscellaneous routines, don't really fit in any category per se. */
/* Reboot the machine with the command line passed. */
void prom_reboot(char *boot_command);
/* Evaluate the forth string passed. */
void prom_feval(char *forth_string);
/* Enter the prom, with possibility of continuation with the 'go'
* command in newer proms.
void prom_cmdline(void);
/* Enter the prom, with no chance of continuation for the stand-alone
* which calls this.
void __noreturn prom_halt(void);
/* Set the PROM 'sync' callback function to the passed function pointer.
* When the user gives the 'sync' command at the prom prompt while the
* kernel is still active, the prom will call this routine.
* XXX The arguments are different on V0 vs. V2->higher proms, grrr! XXX
typedef void (*sync_func_t)(void);
void prom_setsync(sync_func_t func_ptr);
/* Acquire the IDPROM of the root node in the prom device tree. This
* gets passed a buffer where you would like it stuffed. The return value
* is the format type of this idprom or 0xff on error.
unsigned char prom_get_idprom(char *idp_buffer, int idpbuf_size);
/* Get the prom major version. */
int prom_version(void);
/* Get the prom plugin revision. */
int prom_getrev(void);
/* Get the prom firmware revision. */
int prom_getprev(void);
/* Write a buffer of characters to the console. */
void prom_console_write_buf(const char *buf, int len);
/* Prom's internal routines, don't use in kernel/boot code. */
__printf(1, 2) void prom_printf(const char *fmt, ...);
void prom_write(const char *buf, unsigned int len);
/* Multiprocessor operations... */
/* Start the CPU with the given device tree node, context table, and context
* at the passed program counter.
int prom_startcpu(int cpunode, struct linux_prom_registers *context_table,
int context, char *program_counter);
/* Initialize the memory lists based upon the prom version. */
void prom_meminit(void);
/* PROM device tree traversal functions... */
/* Get the child node of the given node, or zero if no child exists. */
phandle prom_getchild(phandle parent_node);
/* Get the next sibling node of the given node, or zero if no further
* siblings exist.
phandle prom_getsibling(phandle node);
/* Get the length, at the passed node, of the given property type.
* Returns -1 on error (ie. no such property at this node).
int prom_getproplen(phandle thisnode, const char *property);
/* Fetch the requested property using the given buffer. Returns
* the number of bytes the prom put into your buffer or -1 on error.
int __must_check prom_getproperty(phandle thisnode, const char *property,
char *prop_buffer, int propbuf_size);
/* Acquire an integer property. */
int prom_getint(phandle node, char *property);
/* Acquire an integer property, with a default value. */
int prom_getintdefault(phandle node, char *property, int defval);
/* Acquire a boolean property, 0=FALSE 1=TRUE. */
int prom_getbool(phandle node, char *prop);
/* Acquire a string property, null string on error. */
void prom_getstring(phandle node, char *prop, char *buf, int bufsize);
/* Search all siblings starting at the passed node for "name" matching
* the given string. Returns the node on success, zero on failure.
phandle prom_searchsiblings(phandle node_start, char *name);
/* Returns the next property after the passed property for the given
* node. Returns null string on failure.
char *prom_nextprop(phandle node, char *prev_property, char *buffer);
/* Returns phandle of the path specified */
phandle prom_finddevice(char *name);
/* Set the indicated property at the given node with the passed value.
* Returns the number of bytes of your value that the prom took.
int prom_setprop(phandle node, const char *prop_name, char *prop_value,
int value_size);
phandle prom_inst2pkg(int);
/* Dorking with Bus ranges... */
/* Apply promlib probes OBIO ranges to registers. */
void prom_apply_obio_ranges(struct linux_prom_registers *obioregs, int nregs);
/* Apply ranges of any prom node (and optionally parent node as well) to registers. */
void prom_apply_generic_ranges(phandle node, phandle parent,
struct linux_prom_registers *sbusregs, int nregs);
void prom_ranges_init(void);
/* CPU probing helpers. */
int cpu_find_by_instance(int instance, phandle *prom_node, int *mid);
int cpu_find_by_mid(int mid, phandle *prom_node);
int cpu_get_hwmid(phandle prom_node);
extern spinlock_t prom_lock;
#endif /* !(__SPARC_OPLIB_H) */