1/* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * SGI ARCS firmware interface library for the Linux kernel. 7 * 8 * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com) 9 * Copyright (C) 2001, 2002 Ralf Baechle (ralf@gnu.org) 10 */ 11#ifndef _ASM_SGIALIB_H 12#define _ASM_SGIALIB_H 13 14#include <asm/sgiarcs.h> 15 16extern struct linux_romvec *romvec; 17extern int prom_argc; 18 19extern LONG *_prom_argv, *_prom_envp; 20 21/* A 32-bit ARC PROM pass arguments and environment as 32-bit pointer. 22 These macros take care of sign extension. */ 23#define prom_argv(index) ((char *) (long) _prom_argv[(index)]) 24#define prom_argc(index) ((char *) (long) _prom_argc[(index)]) 25 26extern int prom_flags; 27 28#define PROM_FLAG_ARCS 1 29#define PROM_FLAG_USE_AS_CONSOLE 2 30#define PROM_FLAG_DONT_FREE_TEMP 4 31 32/* Simple char-by-char console I/O. */ 33extern void prom_putchar(char c); 34extern char prom_getchar(void); 35 36/* Memory descriptor management. */ 37#define PROM_MAX_PMEMBLOCKS 32 38struct prom_pmemblock { 39 LONG base; /* Within KSEG0 or XKPHYS. */ 40 ULONG size; /* In bytes. */ 41 ULONG type; /* free or prom memory */ 42}; 43 44/* Get next memory descriptor after CURR, returns first descriptor 45 * in chain is CURR is NULL. 46 */ 47extern struct linux_mdesc *prom_getmdesc(struct linux_mdesc *curr); 48#define PROM_NULL_MDESC ((struct linux_mdesc *) 0) 49 50/* Called by prom_init to setup the physical memory pmemblock 51 * array. 52 */ 53extern void prom_meminit(void); 54extern void prom_fixup_mem_map(unsigned long start_mem, unsigned long end_mem); 55 56/* PROM device tree library routines. */ 57#define PROM_NULL_COMPONENT ((pcomponent *) 0) 58 59/* Get sibling component of THIS. */ 60extern pcomponent *ArcGetPeer(pcomponent *this); 61 62/* Get child component of THIS. */ 63extern pcomponent *ArcGetChild(pcomponent *this); 64 65/* Get parent component of CHILD. */ 66extern pcomponent *prom_getparent(pcomponent *child); 67 68/* Copy component opaque data of component THIS into BUFFER 69 * if component THIS has opaque data. Returns success or 70 * failure status. 71 */ 72extern long prom_getcdata(void *buffer, pcomponent *this); 73 74/* Other misc. component routines. */ 75extern pcomponent *prom_childadd(pcomponent *this, pcomponent *tmp, void *data); 76extern long prom_delcomponent(pcomponent *this); 77extern pcomponent *prom_componentbypath(char *path); 78 79/* This is called at prom_init time to identify the 80 * ARC architecture we are running on 81 */ 82extern void prom_identify_arch(void); 83 84/* Environment variable routines. */ 85extern PCHAR ArcGetEnvironmentVariable(PCHAR name); 86extern LONG ArcSetEnvironmentVariable(PCHAR name, PCHAR value); 87 88/* ARCS command line acquisition and parsing. */ 89extern char *prom_getcmdline(void); 90extern void prom_init_cmdline(void); 91 92/* Acquiring info about the current time, etc. */ 93extern struct linux_tinfo *prom_gettinfo(void); 94extern unsigned long prom_getrtime(void); 95 96/* File operations. */ 97extern long prom_getvdirent(unsigned long fd, struct linux_vdirent *ent, unsigned long num, unsigned long *cnt); 98extern long prom_open(char *name, enum linux_omode md, unsigned long *fd); 99extern long prom_close(unsigned long fd); 100extern LONG ArcRead(ULONG fd, PVOID buf, ULONG num, PULONG cnt); 101extern long prom_getrstatus(unsigned long fd); 102extern LONG ArcWrite(ULONG fd, PVOID buf, ULONG num, PULONG cnt); 103extern long prom_seek(unsigned long fd, struct linux_bigint *off, enum linux_seekmode sm); 104extern long prom_mount(char *name, enum linux_mountops op); 105extern long prom_getfinfo(unsigned long fd, struct linux_finfo *buf); 106extern long prom_setfinfo(unsigned long fd, unsigned long flags, unsigned long msk); 107 108/* Running stand-along programs. */ 109extern long prom_load(char *name, unsigned long end, unsigned long *pc, unsigned long *eaddr); 110extern long prom_invoke(unsigned long pc, unsigned long sp, long argc, char **argv, char **envp); 111extern long prom_exec(char *name, long argc, char **argv, char **envp); 112 113/* Misc. routines. */ 114extern VOID prom_halt(VOID) __attribute__((noreturn)); 115extern VOID prom_powerdown(VOID) __attribute__((noreturn)); 116extern VOID prom_restart(VOID) __attribute__((noreturn)); 117extern VOID ArcReboot(VOID) __attribute__((noreturn)); 118extern VOID ArcEnterInteractiveMode(VOID) __attribute__((noreturn)); 119extern long prom_cfgsave(VOID); 120extern struct linux_sysid *prom_getsysid(VOID); 121extern VOID ArcFlushAllCaches(VOID); 122extern DISPLAY_STATUS *ArcGetDisplayStatus(ULONG FileID); 123 124#endif /* _ASM_SGIALIB_H */ 125