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 <linux/compiler.h> 15 #include <asm/sgiarcs.h> 16 17 extern struct linux_romvec *romvec; 18 extern int prom_argc; 19 20 extern LONG *_prom_argv, *_prom_envp; 21 22 /* A 32-bit ARC PROM pass arguments and environment as 32-bit pointer. 23 These macros take care of sign extension. */ 24 #define prom_argv(index) ((char *) (long) _prom_argv[(index)]) 25 #define prom_argc(index) ((char *) (long) _prom_argc[(index)]) 26 27 extern int prom_flags; 28 29 #define PROM_FLAG_ARCS 1 30 #define PROM_FLAG_USE_AS_CONSOLE 2 31 #define PROM_FLAG_DONT_FREE_TEMP 4 32 33 /* Simple char-by-char console I/O. */ 34 extern void prom_putchar(char c); 35 extern char prom_getchar(void); 36 37 /* Get next memory descriptor after CURR, returns first descriptor 38 * in chain is CURR is NULL. 39 */ 40 extern struct linux_mdesc *prom_getmdesc(struct linux_mdesc *curr); 41 #define PROM_NULL_MDESC ((struct linux_mdesc *) 0) 42 43 /* Called by prom_init to setup the physical memory pmemblock 44 * array. 45 */ 46 extern void prom_meminit(void); 47 48 /* PROM device tree library routines. */ 49 #define PROM_NULL_COMPONENT ((pcomponent *) 0) 50 51 /* Get sibling component of THIS. */ 52 extern pcomponent *ArcGetPeer(pcomponent *this); 53 54 /* Get child component of THIS. */ 55 extern pcomponent *ArcGetChild(pcomponent *this); 56 57 /* This is called at prom_init time to identify the 58 * ARC architecture we are running on 59 */ 60 extern void prom_identify_arch(void); 61 62 /* Environment variable routines. */ 63 extern PCHAR ArcGetEnvironmentVariable(PCHAR name); 64 extern LONG ArcSetEnvironmentVariable(PCHAR name, PCHAR value); 65 66 /* ARCS command line parsing. */ 67 extern void prom_init_cmdline(void); 68 69 /* File operations. */ 70 extern LONG ArcRead(ULONG fd, PVOID buf, ULONG num, PULONG cnt); 71 extern LONG ArcWrite(ULONG fd, PVOID buf, ULONG num, PULONG cnt); 72 73 /* Misc. routines. */ 74 extern VOID ArcHalt(VOID) __noreturn; 75 extern VOID ArcPowerDown(VOID) __noreturn; 76 extern VOID ArcRestart(VOID) __noreturn; 77 extern VOID ArcReboot(VOID) __noreturn; 78 extern VOID ArcEnterInteractiveMode(VOID) __noreturn; 79 extern VOID ArcFlushAllCaches(VOID); 80 extern DISPLAY_STATUS *ArcGetDisplayStatus(ULONG FileID); 81 82 #endif /* _ASM_SGIALIB_H */ 83