oplib.h
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- /* $Id: oplib.h,v 1.21.2.2 2001/12/21 00:52:47 davem Exp $
- * oplib.h: Describes the interface and available routines in the
- * Linux Prom library.
- *
- * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
- */
- #ifndef __SPARC_OPLIB_H
- #define __SPARC_OPLIB_H
- #include <asm/openprom.h>
- #include <linux/spinlock.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 */
- PROM_AP1000, /* actually no prom at all */
- PROM_SUN4, /* Old sun4 proms are totally different, but we'll shoehorn it to make it fit */
- };
- 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 int prom_root_node;
- /* PROM stdin and stdout */
- extern int prom_stdin, prom_stdout;
- /* 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.
- */
- extern void prom_init(struct linux_romvec *rom_ptr);
- /* Boot argument acquisition, returns the boot command line string. */
- extern char *prom_getbootargs(void);
- /* Device utilities. */
- /* Map and unmap devices in IO space at virtual addresses. Note that the
- * virtual address you pass is a request and the prom may put your mappings
- * somewhere else, so check your return value as that is where your new
- * mappings really are!
- *
- * Another note, these are only available on V2 or higher proms!
- */
- extern char *prom_mapio(char *virt_hint, int io_space, unsigned int phys_addr, unsigned int num_bytes);
- extern void prom_unmapio(char *virt_addr, unsigned int num_bytes);
- /* Device operations. */
- /* Open the device described by the passed string. Note, that the format
- * of the string is different on V0 vs. V2->higher proms. The caller must
- * know what he/she is doing! Returns the device descriptor, an int.
- */
- extern int prom_devopen(char *device_string);
- /* Close a previously opened device described by the passed integer
- * descriptor.
- */
- extern int prom_devclose(int device_handle);
- /* Do a seek operation on the device described by the passed integer
- * descriptor.
- */
- extern void prom_seek(int device_handle, unsigned int seek_hival,
- unsigned int seek_lowval);
- /* Machine memory configuration routine. */
- /* This function returns a V0 format memory descriptor table, it has three
- * entries. One for the total amount of physical ram on the machine, one
- * for the amount of physical ram available, and one describing the virtual
- * areas which are allocated by the prom. So, in a sense the physical
- * available is a calculation of the total physical minus the physical mapped
- * by the prom with virtual mappings.
- *
- * These lists are returned pre-sorted, this should make your life easier
- * since the prom itself is way too lazy to do such nice things.
- */
- extern struct linux_mem_v0 *prom_meminfo(void);
- /* Miscellaneous routines, don't really fit in any category per se. */
- /* Reboot the machine with the command line passed. */
- extern void prom_reboot(char *boot_command);
- /* Evaluate the forth string passed. */
- extern void prom_feval(char *forth_string);
- /* Enter the prom, with possibility of continuation with the 'go'
- * command in newer proms.
- */
- extern void prom_cmdline(void);
- /* Enter the prom, with no chance of continuation for the stand-alone
- * which calls this.
- */
- extern void prom_halt(void) __attribute__ ((noreturn));
- /* 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);
- extern 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.
- */
- extern unsigned char prom_get_idprom(char *idp_buffer, int idpbuf_size);
- /* Get the prom major version. */
- extern int prom_version(void);
- /* Get the prom plugin revision. */
- extern int prom_getrev(void);
- /* Get the prom firmware revision. */
- extern int prom_getprev(void);
- /* Character operations to/from the console.... */
- /* Non-blocking get character from console. */
- extern int prom_nbgetchar(void);
- /* Non-blocking put character to console. */
- extern int prom_nbputchar(char character);
- /* Blocking get character from console. */
- extern char prom_getchar(void);
- /* Blocking put character to console. */
- extern void prom_putchar(char character);
- /* Prom's internal printf routine, don't use in kernel/boot code. */
- void prom_printf(char *fmt, ...);
- /* Query for input device type */
- enum prom_input_device {
- PROMDEV_IKBD, /* input from keyboard */
- PROMDEV_ITTYA, /* input from ttya */
- PROMDEV_ITTYB, /* input from ttyb */
- PROMDEV_I_UNK,
- };
- extern enum prom_input_device prom_query_input_device(void);
- /* Query for output device type */
- enum prom_output_device {
- PROMDEV_OSCREEN, /* to screen */
- PROMDEV_OTTYA, /* to ttya */
- PROMDEV_OTTYB, /* to ttyb */
- PROMDEV_O_UNK,
- };
- extern enum prom_output_device prom_query_output_device(void);
- /* Multiprocessor operations... */
- /* Start the CPU with the given device tree node, context table, and context
- * at the passed program counter.
- */
- extern int prom_startcpu(int cpunode, struct linux_prom_registers *context_table,
- int context, char *program_counter);
- /* Stop the CPU with the passed device tree node. */
- extern int prom_stopcpu(int cpunode);
- /* Idle the CPU with the passed device tree node. */
- extern int prom_idlecpu(int cpunode);
- /* Re-Start the CPU with the passed device tree node. */
- extern int prom_restartcpu(int cpunode);
- /* PROM memory allocation facilities... */
- /* Allocated at possibly the given virtual address a chunk of the
- * indicated size.
- */
- extern char *prom_alloc(char *virt_hint, unsigned int size);
- /* Free a previously allocated chunk. */
- extern void prom_free(char *virt_addr, unsigned int size);
- /* Sun4/sun4c specific memory-management startup hook. */
- /* Map the passed segment in the given context at the passed
- * virtual address.
- */
- extern void prom_putsegment(int context, unsigned long virt_addr,
- int physical_segment);
- /* PROM device tree traversal functions... */
- #ifdef PROMLIB_INTERNAL
- /* Internal version of prom_getchild. */
- extern int __prom_getchild(int parent_node);
- /* Internal version of prom_getsibling. */
- extern int __prom_getsibling(int node);
- #endif
- /* Get the child node of the given node, or zero if no child exists. */
- extern int prom_getchild(int parent_node);
- /* Get the next sibling node of the given node, or zero if no further
- * siblings exist.
- */
- extern int prom_getsibling(int node);
- /* Get the length, at the passed node, of the given property type.
- * Returns -1 on error (ie. no such property at this node).
- */
- extern int prom_getproplen(int thisnode, 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.
- */
- extern int prom_getproperty(int thisnode, char *property,
- char *prop_buffer, int propbuf_size);
- /* Acquire an integer property. */
- extern int prom_getint(int node, char *property);
- /* Acquire an integer property, with a default value. */
- extern int prom_getintdefault(int node, char *property, int defval);
- /* Acquire a boolean property, 0=FALSE 1=TRUE. */
- extern int prom_getbool(int node, char *prop);
- /* Acquire a string property, null string on error. */
- extern void prom_getstring(int node, char *prop, char *buf, int bufsize);
- /* Does the passed node have the given "name"? YES=1 NO=0 */
- extern int prom_nodematch(int thisnode, char *name);
- /* Puts in buffer a prom name in the form name@x,y or name (x for which_io
- * and y for first regs phys address
- */
- extern int prom_getname(int node, char *buf, int buflen);
- /* Search all siblings starting at the passed node for "name" matching
- * the given string. Returns the node on success, zero on failure.
- */
- extern int prom_searchsiblings(int node_start, char *name);
- /* Return the first property type, as a string, for the given node.
- * Returns a null string on error.
- */
- extern char *prom_firstprop(int node, char *buffer);
- /* Returns the next property after the passed property for the given
- * node. Returns null string on failure.
- */
- extern char *prom_nextprop(int node, char *prev_property, char *buffer);
- /* Returns phandle of the path specified */
- extern int prom_finddevice(char *name);
- /* Returns 1 if the specified node has given property. */
- extern int prom_node_has_property(int node, char *property);
- /* Set the indicated property at the given node with the passed value.
- * Returns the number of bytes of your value that the prom took.
- */
- extern int prom_setprop(int node, char *prop_name, char *prop_value,
- int value_size);
-
- extern int prom_pathtoinode(char *path);
- extern int prom_inst2pkg(int);
- /* Dorking with Bus ranges... */
- /* Apply promlib probes OBIO ranges to registers. */
- extern 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. */
- extern void prom_apply_generic_ranges(int node, int parent,
- struct linux_prom_registers *sbusregs, int nregs);
- extern spinlock_t prom_lock;
- #endif /* !(__SPARC_OPLIB_H) */