renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-25 21:54:06 +08:00
Code
63b6cad795
linux-next/include/asm-sparc64/oplib.h
David S. Miller 301feb6524 [SPARC64]: Fix lockdep, particularly on SMP. 
As noted by Al Viro, when we try to call prom_set_trap_table()
in the SMP trampoline code we try to take the PROM call spinlock
which doesn't work because the current thread pointer isn't
valid yet and lockdep depends upon that being correct.

Furthermore, we cannot set the current thread pointer register
because it can't be properly dereferenced until we return from
prom_set_trap_table().  Kernel TLB misses only work after that
call.

So do the PROM call to set the trap table directly instead of
going through the OBP library C code, and thus avoid the lock
altogether.

These calls are guarenteed to be serialized fully.

Since there are now no calls to the prom_set_trap_table{_sun4v}()
library functions, they can be deleted.

Signed-off-by: David S. Miller <davem@davemloft.net>
2007-09-16 11:51:15 -07:00

323 lines
10 KiB
C
Raw Blame History

/* oplib.h: Describes the interface and available routines in the
* Linux Prom library.
*
* Copyright (C) 1995, 2007 David S. Miller (davem@davemloft.net)
* Copyright (C) 1996 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
*/
#ifndef __SPARC64_OPLIB_H
#define __SPARC64_OPLIB_H
#include <asm/openprom.h>
/* OBP version string. */
extern char prom_version[];
/* 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;
/* /chosen node of the prom device tree, this stays constant after
* initialization is complete.
*/
extern int prom_chosen_node;
/* Helper values and strings in arch/sparc64/kernel/head.S */
extern const char prom_peer_name[];
extern const char prom_compatible_name[];
extern const char prom_root_compatible[];
extern const char prom_cpu_compatible[];
extern const char prom_finddev_name[];
extern const char prom_chosen_path[];
extern const char prom_cpu_path[];
extern const char prom_getprop_name[];
extern const char prom_mmu_name[];
extern const char prom_callmethod_name[];
extern const char prom_translate_name[];
extern const char prom_map_name[];
extern const char prom_unmap_name[];
extern int prom_mmu_ihandle_cache;
extern unsigned int prom_boot_mapped_pc;
extern unsigned int prom_boot_mapping_mode;
extern unsigned long prom_boot_mapping_phys_high, prom_boot_mapping_phys_low;
struct linux_mlist_p1275 {
struct linux_mlist_p1275 *theres_more;
unsigned long start_adr;
unsigned long num_bytes;
};
struct linux_mem_p1275 {
struct linux_mlist_p1275 **p1275_totphys;
struct linux_mlist_p1275 **p1275_prommap;
struct linux_mlist_p1275 **p1275_available; /* What we can use */
};
/* 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(void *cif_handler, void *cif_stack);
/* Boot argument acquisition, returns the boot command line string. */
extern char *prom_getbootargs(void);
/* Device utilities. */
/* 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(const 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);
/* Miscellaneous routines, don't really fit in any category per se. */
/* Reboot the machine with the command line passed. */
extern void prom_reboot(const char *boot_command);
/* Evaluate the forth string passed. */
extern void prom_feval(const 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));
/* Halt and power-off the machine. */
extern void prom_halt_power_off(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.
*
*/
typedef int (*callback_func_t)(long *cmd);
extern void prom_setcallback(callback_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);
/* 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 routines, don't use in kernel/boot code. */
extern void prom_printf(const char *fmt, ...);
extern void prom_write(const char *buf, unsigned int len);
/* Multiprocessor operations... */
#ifdef CONFIG_SMP
/* Start the CPU with the given device tree node at the passed program
* counter with the given arg passed in via register %o0.
*/
extern void prom_startcpu(int cpunode, unsigned long pc, unsigned long arg);
/* Start the CPU with the given cpu ID at the passed program
* counter with the given arg passed in via register %o0.
*/
extern void prom_startcpu_cpuid(int cpuid, unsigned long pc, unsigned long arg);
/* Stop the CPU with the given cpu ID. */
extern void prom_stopcpu_cpuid(int cpuid);
/* Stop the current CPU. */
extern void prom_stopself(void);
/* Idle the current CPU. */
extern void prom_idleself(void);
/* Resume the CPU with the passed device tree node. */
extern void prom_resumecpu(int cpunode);
#endif
/* Power management interfaces. */
/* Put the current CPU to sleep. */
extern void prom_sleepself(void);
/* Put the entire system to sleep. */
extern int prom_sleepsystem(void);
/* Initiate a wakeup event. */
extern int prom_wakeupsystem(void);
/* MMU and memory related OBP interfaces. */
/* Get unique string identifying SIMM at given physical address. */
extern int prom_getunumber(int syndrome_code,
unsigned long phys_addr,
char *buf, int buflen);
/* Retain physical memory to the caller across soft resets. */
extern unsigned long prom_retain(const char *name,
unsigned long pa_low, unsigned long pa_high,
long size, long align);
/* Load explicit I/D TLB entries into the calling processor. */
extern long prom_itlb_load(unsigned long index,
unsigned long tte_data,
unsigned long vaddr);
extern long prom_dtlb_load(unsigned long index,
unsigned long tte_data,
unsigned long vaddr);
/* Map/Unmap client program address ranges. First the format of
* the mapping mode argument.
*/
#define PROM_MAP_WRITE 0x0001 /* Writable */
#define PROM_MAP_READ 0x0002 /* Readable - sw */
#define PROM_MAP_EXEC 0x0004 /* Executable - sw */
#define PROM_MAP_LOCKED 0x0010 /* Locked, use i/dtlb load calls for this instead */
#define PROM_MAP_CACHED 0x0020 /* Cacheable in both L1 and L2 caches */
#define PROM_MAP_SE 0x0040 /* Side-Effects */
#define PROM_MAP_GLOB 0x0080 /* Global */
#define PROM_MAP_IE 0x0100 /* Invert-Endianness */
#define PROM_MAP_DEFAULT (PROM_MAP_WRITE | PROM_MAP_READ | PROM_MAP_EXEC | PROM_MAP_CACHED)
extern int prom_map(int mode, unsigned long size,
unsigned long vaddr, unsigned long paddr);
extern void prom_unmap(unsigned long size, unsigned long vaddr);
/* 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, 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.
*/
extern int prom_getproperty(int thisnode, const char *property,
char *prop_buffer, int propbuf_size);
/* Acquire an integer property. */
extern int prom_getint(int node, const char *property);
/* Acquire an integer property, with a default value. */
extern int prom_getintdefault(int node, const char *property, int defval);
/* Acquire a boolean property, 0=FALSE 1=TRUE. */
extern int prom_getbool(int node, const char *prop);
/* Acquire a string property, null string on error. */
extern void prom_getstring(int node, const char *prop, char *buf, int bufsize);
/* Does the passed node have the given "name"? YES=1 NO=0 */
extern int prom_nodematch(int thisnode, const char *name);
/* 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, const char *name);
/* Return the first property type, as a string, for the given node.
* Returns a null string on error. Buffer should be at least 32B long.
*/
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. Buffer should be at least 32B long.
*/
extern char *prom_nextprop(int node, const char *prev_property, char *buffer);
/* Returns 1 if the specified node has given property. */
extern int prom_node_has_property(int node, const char *property);
/* Returns phandle of the path specified */
extern int prom_finddevice(const 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.
*/
extern int prom_setprop(int node, const char *prop_name, char *prop_value,
int value_size);
extern int prom_pathtoinode(const char *path);
extern int prom_inst2pkg(int);
extern int prom_service_exists(const char *service_name);
extern void prom_sun4v_guest_soft_state(void);
extern int prom_ihandle2path(int handle, char *buffer, int bufsize);
/* Client interface level routines. */
extern long p1275_cmd(const char *, long, ...);
#if 0
#define P1275_SIZE(x) ((((long)((x) / 32)) << 32) | (x))
#else
#define P1275_SIZE(x) x
#endif
/* We support at most 16 input and 1 output argument */
#define P1275_ARG_NUMBER 0
#define P1275_ARG_IN_STRING 1
#define P1275_ARG_OUT_BUF 2
#define P1275_ARG_OUT_32B 3
#define P1275_ARG_IN_FUNCTION 4
#define P1275_ARG_IN_BUF 5
#define P1275_ARG_IN_64B 6
#define P1275_IN(x) ((x) & 0xf)
#define P1275_OUT(x) (((x) << 4) & 0xf0)
#define P1275_INOUT(i,o) (P1275_IN(i)|P1275_OUT(o))
#define P1275_ARG(n,x) ((x) << ((n)*3 + 8))
#endif /* !(__SPARC64_OPLIB_H) */
View Git Blame Copy Permalink