diff options
Diffstat (limited to 'sys/arch/i386/isa/isa_machdep.h')
| -rw-r--r-- | sys/arch/i386/isa/isa_machdep.h | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/sys/arch/i386/isa/isa_machdep.h b/sys/arch/i386/isa/isa_machdep.h new file mode 100644 index 00000000000..a118e7fc17a --- /dev/null +++ b/sys/arch/i386/isa/isa_machdep.h @@ -0,0 +1,137 @@ +/* $NetBSD: isa_machdep.h,v 1.4 1995/05/04 19:39:46 cgd Exp $ */ + +/*- + * Copyright (c) 1990 The Regents of the University of California. + * All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * William Jolitz. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)isa.h 5.7 (Berkeley) 5/9/91 + */ + +/* + * XXX THIS FILE IS A MESS. copyright: berkeley's probably. + * contents from isavar.h and isareg.h, mostly the latter. + * perhaps charles's? + * + * copyright from berkeley's isa.h which is now dev/isa/isareg.h. + */ + + +/* + * XXX Various seemingly PC-specific constants, some of which may be + * unnecessary anyway. + */ + +/* + * RAM Physical Address Space (ignoring the above mentioned "hole") + */ +#define RAM_BEGIN 0x0000000 /* Start of RAM Memory */ +#define RAM_END 0x1000000 /* End of RAM Memory */ +#define RAM_SIZE (RAM_END - RAM_BEGIN) + +/* + * Oddball Physical Memory Addresses + */ +#define COMPAQ_RAMRELOC 0x80c00000 /* Compaq RAM relocation/diag */ +#define COMPAQ_RAMSETUP 0x80c00002 /* Compaq RAM setup */ +#define WEITEK_FPU 0xC0000000 /* WTL 2167 */ +#define CYRIX_EMC 0xC0000000 /* Cyrix EMC */ + +/* + * stuff that used to be in pccons.c + */ +#define MONO_BASE 0x3B4 +#define MONO_BUF 0xB0000 +#define CGA_BASE 0x3D4 +#define CGA_BUF 0xB8000 +#define IOPHYSMEM 0xA0000 + + +/* + * Interrupt handler chains. isa_intr_establish() inserts a handler into + * the list. The handler is called with its (single) argument. + */ + +struct intrhand { + int (*ih_fun)(); + void *ih_arg; + u_long ih_count; + struct intrhand *ih_next; + int ih_level; + int ih_irq; +}; + + +/* + * ISA DMA bounce buffers. + * XXX should be made partially machine- and bus-mapping-independent. + * + * DMA_BOUNCE is the number of pages of low-addressed physical memory + * to acquire for ISA bounce buffers. + * + * isaphysmem is the location of those bounce buffers. (They are currently + * assumed to be contiguous. + */ + +#ifndef DMA_BOUNCE +#define DMA_BOUNCE 8 /* one buffer per channel */ +#endif + +extern vm_offset_t isaphysmem; + + +/* + * Variables and macros to deal with the ISA I/O hole. + * XXX These should be converted to machine- and bus-mapping-independent + * function definitions, invoked through the softc. + */ + +extern u_long atdevbase; /* kernel virtual address of "hole" */ + +/* + * Given a kernel virtual address for some location + * in the "hole" I/O space, return a physical address. + */ +#define ISA_PHYSADDR(v) ((void *) ((u_long)(v) - atdevbase + IOM_BEGIN)) + +/* + * Given a physical address in the "hole", + * return a kernel virtual address. + */ +#define ISA_HOLE_VADDR(p) ((void *) ((u_long)(p) - IOM_BEGIN + atdevbase)) + + +/* + * Miscellanous functions. + */ +void sysbeep __P((int, int)); /* beep with the system speaker */ |