1 /* $NetBSD: tc_machdep.h,v 1.7 1997/06/22 07:42:37 jonathan Exp $ */ 2 3 /* 4 * Copyright (c) 1994, 1995 Carnegie-Mellon University. 5 * All rights reserved. 6 * 7 * Author: Jonathan Stone, Chris G. Demetriou 8 * 9 * Permission to use, copy, modify and distribute this software and 10 * its documentation is hereby granted, provided that both the copyright 11 * notice and this permission notice appear in all copies of the 12 * software, derivative works or modified versions, and any portions 13 * thereof, and that both notices appear in supporting documentation. 14 * 15 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 16 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 17 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 18 * 19 * Carnegie Mellon requests users of this software to return to 20 * 21 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 22 * School of Computer Science 23 * Carnegie Mellon University 24 * Pittsburgh PA 15213-3890 25 * 26 * any improvements or extensions that they make and grant Carnegie the 27 * rights to redistribute these changes. 28 */ 29 30 /* 31 * Machine-specific definitions for TurboChannel support. 32 * 33 * This file must typedef the following types: 34 * 35 * tc_addr_t TurboChannel bus address 36 * tc_offset_t TurboChannel bus address difference (offset) 37 * 38 * This file must prototype or define the following functions 39 * or macros (one or more of which may be no-ops): 40 * 41 * tc_mb() read/write memory barrier (any CPU<->memory 42 * reads/writes before must complete before any 43 * CPU<->memory reads/writes after). 44 * tc_wmb() write memory barrier (any CPU<->memory writes 45 * before must complete before any CPU<->memory 46 * writes after). 47 * tc_syncbus() sync TC bus; make sure CPU writes are 48 * propagated across the TurboChannel bus. 49 * tc_badaddr() return non-zero if the given address is invalid. 50 * TC_DENSE_TO_SPARSE() 51 * convert the given physical address in 52 * TurboChannel dense space to the corresponding 53 * address in TurboChannel sparse space. 54 * TC_PHYS_TO_UNCACHED() 55 * convert the given system memory physical address 56 * to the physical address of the corresponding 57 * region that is not cached. 58 */ 59 60 #ifndef __MACHINE_TC_MACHDEP_H__ 61 #define __MACHINE_TC_MACHDEP_H__ 62 63 #include <mips/cpuregs.h> /* defines MIPS_PHYS_TO_KSEG1 */ 64 65 typedef int32_t tc_addr_t; 66 typedef int32_t tc_offset_t; 67 68 #define tc_mb() wbflush() 69 #define tc_wmb() wbflush() 70 71 /* 72 * XXX how to do this on a DECstation ? 73 */ 74 #define tc_syncbus() wbflush(); 75 76 #define tc_badaddr(tcaddr) \ 77 badaddr((void *)(tcaddr), sizeof (u_int32_t)) 78 79 #define TC_DENSE_TO_SPARSE(addr) (addr) 80 81 #define TC_PHYS_TO_UNCACHED(addr) MIPS_PHYS_TO_KSEG1(addr) 82 83 84 /* 85 * Use the following macros to compare device names on a pmax, as 86 * the autoconfig structs are in a state of flux. 87 */ 88 struct confargs; 89 90 #define TC_BUS_MATCHNAME(ta, name) \ 91 (strncmp( (ta)->ta_modname, (name), TC_ROM_LLEN+1) == 0) 92 93 /* 94 * Port-specific declarations: 95 * Declarations "private" sys/dev/tc/tc.c MI functions used to search 96 * for potential TC-option console devices (framebuffers), 97 */ 98 int tc_checkslot __P((tc_addr_t slotbase, char *namep)); 99 100 /* 101 * And declarations for the MD function used to search for and configure 102 * a TC framebuffer as system console, and to configure the TC bus 103 * (the last is a hack). 104 */ 105 106 extern int tc_findconsole __P((int preferred_slot)); 107 extern void config_tcbus __P((struct device *parent, int cputype, 108 int printfn __P((void*, const char*)) )); 109 extern int badaddr __P((void *, u_int)); 110 111 #endif /* __MACHINE_TC_MACHDEP_H__*/ 112