88 lines
3.6 KiB
C
88 lines
3.6 KiB
C
/* $NetBSD: boot.h,v 1.2 2001/07/28 12:53:06 bjh21 Exp $ */
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/*-
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* Copyright (c) 1998 Ben Harris
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/* This file is part of NetBSD/arm26 -- a port of NetBSD to ARM2/3 machines. */
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/*
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* bootconfig.h -- Stuff to do with starting the kernel
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*/
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#ifndef _ARM26_BOOT_H
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#define _ARM26_BOOT_H
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#include <sys/types.h>
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/*
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* Bootloader contract 0.2:
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* + APCS conformant entry.
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* + SVC mode.
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* + Interrupts (IRQ and FIQ) disabled on CPU.
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* + CPU caches disabled.
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* + Physical memory below 512k is unused except for screen.
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* + First three 32k blocks above 512k are zero page, stack and msgbuf.
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* + From there to freebase should be preserved unless you know better.
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* + From freebase to top of RAM is for general use.
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* + VIDC is set up as specified (not really bootloader's job).
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*/
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#define BOOT_MAGIC 0x942B7DFE
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struct bootconfig {
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u_int32_t magic; /* BOOT_MAGIC */
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u_int32_t version; /* minor version of structure */
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/* Standard NetBSD boot parameters */
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u_int32_t boothowto; /* Reboot flags (single-user etc) */
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u_int32_t bootdev; /* Boot device */
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u_int32_t ssym; /* Start of debugging symbols */
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u_int32_t esym; /* End of debugging symbols */
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/* Parameters gathered by OS_ReadMemMapInfo */
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u_int32_t nbpp; /* Machine page size in bytes */
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u_int32_t npages; /* Number of pages */
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/* Layout of physical memory. */
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u_int32_t txtbase; /* Kernel text base */
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u_int32_t txtsize; /* ... and size */
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u_int32_t database; /* Ditto for data */
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u_int32_t datasize; /* and bss */
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u_int32_t bssbase; /* Note that base addresses are */
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u_int32_t bsssize; /* "physical" ie bytes above 0x02000000 */
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u_int32_t freebase; /* Start of free space */
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/* Framebuffer state -- used to initialise raster console */
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u_int32_t xpixels; /* Pixels across screen (XWindLimit + 1) */
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u_int32_t ypixels; /* Pixels down screen (YWindLimit + 1) */
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u_int32_t bpp; /* Bits per pixel (1 << Log2BPP) */
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u_int32_t screenbase; /* Physical base of screen */
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u_int32_t screensize; /* Size of framebuffer (TotalScreenSize) */
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u_int32_t cpixelrow; /* first free pixel row on screen */
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/* Version 0 ends here */
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};
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#ifdef _KERNEL
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void start __P((struct bootconfig *));
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extern struct bootconfig bootconfig;
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#endif
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#endif
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