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 (davem@davemloft.net) 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 16 extern struct linux_romvec *romvec; 17 extern int prom_argc; 18 19 extern 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 26 extern 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. */ 33 extern void prom_putchar(char c); 34 extern char prom_getchar(void); 35 36 /* Get next memory descriptor after CURR, returns first descriptor 37 * in chain is CURR is NULL. 38 */ 39 extern struct linux_mdesc *prom_getmdesc(struct linux_mdesc *curr); 40 #define PROM_NULL_MDESC ((struct linux_mdesc *) 0) 41 42 /* Called by prom_init to setup the physical memory pmemblock 43 * array. 44 */ 45 extern void prom_meminit(void); 46 47 /* PROM device tree library routines. */ 48 #define PROM_NULL_COMPONENT ((pcomponent *) 0) 49 50 /* Get sibling component of THIS. */ 51 extern pcomponent *ArcGetPeer(pcomponent *this); 52 53 /* Get child component of THIS. */ 54 extern pcomponent *ArcGetChild(pcomponent *this); 55 56 /* This is called at prom_init time to identify the 57 * ARC architecture we are running on 58 */ 59 extern void prom_identify_arch(void); 60 61 /* Environment variable routines. */ 62 extern PCHAR ArcGetEnvironmentVariable(PCHAR name); 63 extern LONG ArcSetEnvironmentVariable(PCHAR name, PCHAR value); 64 65 /* ARCS command line parsing. */ 66 extern void prom_init_cmdline(void); 67 68 /* File operations. */ 69 extern LONG ArcRead(ULONG fd, PVOID buf, ULONG num, PULONG cnt); 70 extern LONG ArcWrite(ULONG fd, PVOID buf, ULONG num, PULONG cnt); 71 72 /* Misc. routines. */ 73 extern VOID ArcReboot(VOID) __attribute__((noreturn)); 74 extern VOID ArcEnterInteractiveMode(VOID) __attribute__((noreturn)); 75 extern VOID ArcFlushAllCaches(VOID); 76 extern DISPLAY_STATUS *ArcGetDisplayStatus(ULONG FileID); 77 78 #endif /* _ASM_SGIALIB_H */ 79