595a251c07
sparc64 systems have a restriction in that passing in buffer addressses above 4GB to prom calls is not reliable. We end up violating this when we do prom console writes, because we use an on-stack buffer to translate '\n' into '\r\n'. So instead, do this translation into an intermediate buffer, which is in the kernel image and thus below 4GB, then pass that to the PROM console write calls. On the 32-bit side we don't have to deal with any of these issues, so the new prom_console_write_buf() uses the existing prom_nbputchar() implementation. However we can now mark those routines static. Since the 64-bit side completely uses new code we can delete the putchar bits as they are now completely unused. Signed-off-by: David S. Miller <davem@davemloft.net>
229 lines
7.7 KiB
C
229 lines
7.7 KiB
C
/*
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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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/* Device utilities. */
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/* Map and unmap devices in IO space at virtual addresses. Note that the
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* virtual address you pass is a request and the prom may put your mappings
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* somewhere else, so check your return value as that is where your new
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* mappings really are!
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*
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* Another note, these are only available on V2 or higher proms!
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*/
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extern char *prom_mapio(char *virt_hint, int io_space, unsigned int phys_addr, unsigned int num_bytes);
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extern void prom_unmapio(char *virt_addr, unsigned int num_bytes);
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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 prom_halt(void) __attribute__ ((noreturn));
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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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/* Stop the CPU with the passed device tree node. */
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extern int prom_stopcpu(int cpunode);
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/* Idle the CPU with the passed device tree node. */
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extern int prom_idlecpu(int cpunode);
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/* Re-Start the CPU with the passed device tree node. */
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extern int prom_restartcpu(int cpunode);
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/* PROM memory allocation facilities... */
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/* Allocated at possibly the given virtual address a chunk of the
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* indicated size.
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*/
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extern char *prom_alloc(char *virt_hint, unsigned int size);
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/* Free a previously allocated chunk. */
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extern void prom_free(char *virt_addr, unsigned int size);
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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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/* 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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/* Does the passed node have the given "name"? YES=1 NO=0 */
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extern int prom_nodematch(phandle thisnode, char *name);
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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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/* Return the first property type, as a string, for the given node.
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* Returns a null string on error.
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*/
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extern char *prom_firstprop(phandle node, char *buffer);
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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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/* Returns 1 if the specified node has given property. */
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extern int prom_node_has_property(phandle node, char *property);
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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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/* 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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