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freebsd-dev/sys/i386/boot/biosboot/table.c

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Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
/*
* Mach Operating System
* Copyright (c) 1992, 1991 Carnegie Mellon University
* All Rights Reserved.
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*
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* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
New boot blocks, from Bruce Evans, and NetBSD fixes. Allows kernel to be loaded above 1MB. Same boot code for floppies now. Speed improvements. etc etc etc. (I don't have much history on this, but then have been tested)
1993-07-13 18:15:32 +00:00
*
Removed all patch kit headers, sccsid and rcsid strings, put $Id$ in, some minor cleanup. Added $Id$ to files that did not have any version info, etc
1993-10-16 19:17:18 +00:00
* from: Mach, Revision 2.2 92/04/04 11:36:43 rpd
Back out part 1 of the MCFH that changed $Id$ to $FreeBSD$. We are not ready for it yet.
1997-02-22 09:48:43 +00:00
* $Id$
Initial import, 0.1 + pk 0.2.4-B1
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*/
/*
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Copyright 1988, 1989, 1990, 1991, 1992
Initial import, 0.1 + pk 0.2.4-B1
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by Intel Corporation, Santa Clara, California.
All Rights Reserved
Permission to use, copy, modify, and distribute this software and
its documentation for any purpose and without fee is hereby
granted, provided that the above copyright notice appears in all
copies and that both the copyright notice and this permission notice
appear in supporting documentation, and that the name of Intel
not be used in advertising or publicity pertaining to distribution
of the software without specific, written prior permission.
INTEL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS,
IN NO EVENT SHALL INTEL BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
Boot block cleanup. o Fix the keyboard probe to properly wait for the ready bit before sending a command to the keyboard controller. This should avoid the problems some people are experiencing where the boot blocks hang the system during keyboard probe. (It does solve it for me.) o Fix a bug that effectively prevented the boot blocks from ever passing control to the serial console. [while(--retries) instead of while(retries--)] o Gratuitously reduced the keyboard probe timeout from 500 to 5 seconds. :) o Introduced a new option ``FORCE_COMCONSOLE'' as a commented-out example in the Makefile, to force the usage of a serial console regardless of a keyboard being connected or not. o Moved all external declarations to boot.h, declared all functions there, and ANSIfied all function declarations/definitions. (printf() remains bogus, however -- i'm too lazy to fix this.) We're in the ninetees, dunno why we should still support compilers from the 70's.
1995-04-14 21:26:53 +00:00
#include "boot.h"
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
/* Segment Descriptor
*
* 31 24 19 16 7 0
* ------------------------------------------------------------
* | | |B| |A| | | |1|0|E|W|A| |
* | BASE 31..24 |G|/|0|V| LIMIT |P|DPL| TYPE | BASE 23:16 |
* | | |D| |L| 19..16| | |1|1|C|R|A| |
* ------------------------------------------------------------
* | | |
* | BASE 15..0 | LIMIT 15..0 |
* | | |
* ------------------------------------------------------------
*/
struct seg_desc {
unsigned short limit_15_0;
unsigned short base_15_0;
unsigned char base_23_16;
New boot blocks, from Bruce Evans, and NetBSD fixes. Allows kernel to be loaded above 1MB. Same boot code for floppies now. Speed improvements. etc etc etc. (I don't have much history on this, but then have been tested)
1993-07-13 18:15:32 +00:00
unsigned char p_dpl_type;
unsigned char g_b_a_limit;
Initial import, 0.1 + pk 0.2.4-B1
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unsigned char base_31_24;
};
New boot blocks, from Bruce Evans, and NetBSD fixes. Allows kernel to be loaded above 1MB. Same boot code for floppies now. Speed improvements. etc etc etc. (I don't have much history on this, but then have been tested)
1993-07-13 18:15:32 +00:00
#define RUN 0 /* not really 0, but filled in at boot time */
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
New boot blocks, from Bruce Evans, and NetBSD fixes. Allows kernel to be loaded above 1MB. Same boot code for floppies now. Speed improvements. etc etc etc. (I don't have much history on this, but then have been tested)
1993-07-13 18:15:32 +00:00
struct seg_desc Gdt[] = {
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
{0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, /* 0x0 : null */
{0xFFFF, 0x0, 0x0, 0x9F, 0xCF, 0x0}, /* 0x08 : kernel code */
New boot blocks, from Bruce Evans, and NetBSD fixes. Allows kernel to be loaded above 1MB. Same boot code for floppies now. Speed improvements. etc etc etc. (I don't have much history on this, but then have been tested)
1993-07-13 18:15:32 +00:00
/* 0x9E? */
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
{0xFFFF, 0x0, 0x0, 0x93, 0xCF, 0x0}, /* 0x10 : kernel data */
New boot blocks, from Bruce Evans, and NetBSD fixes. Allows kernel to be loaded above 1MB. Same boot code for floppies now. Speed improvements. etc etc etc. (I don't have much history on this, but then have been tested)
1993-07-13 18:15:32 +00:00
/* 0x92? */
{0xFFFF, RUN, RUN, 0x9E, 0x40, 0x0}, /* 0x18 : boot code */
{0xFFFF, RUN, RUN, 0x92, 0x40, 0x0}, /* 0x20 : boot data */
{0xFFFF, RUN, RUN, 0x9E, 0x0, 0x0}, /* 0x28 : boot code, 16 bits */
Fixed restoring segment descriptors in prot_to_real(). The descriptors must have limit 0xffff and attribute G = 0 (byte granularity) as well as other properties that they already had (see e.g., the Intel i486 manual section 22.5). Not restoring them broke Ctrl-Alt-Del in the bootstrap for my ASUS P55TP4XE system, probably because the Award BIOS does anti-tracing stuff involving inaccessible %esp's. asm.S: Don't use lret in prot_to_real(). This reduces the risk of using an incompletely intialized stack segment and saves space. Submitted by: "K.Higashino" <a00303@cc.hc.keio.ac.jp> (on 13 Jan 1995!) reworked by me
1996-03-08 05:15:54 +00:00
{0xFFFF, 0x0, 0x0, 0x92, 0x0, 0x0}, /* 0x30 : boot data, 16 bits */
Conditionalize support for my debugger. This normally saves 304 bytes.
1994-08-30 01:38:04 +00:00
#ifdef BDE_DEBUGGER
New boot blocks, from Bruce Evans, and NetBSD fixes. Allows kernel to be loaded above 1MB. Same boot code for floppies now. Speed improvements. etc etc etc. (I don't have much history on this, but then have been tested)
1993-07-13 18:15:32 +00:00
/* More for bdb. */
{}, /* BIOS_TMP_INDEX = 7 : null */
{}, /* TSS_INDEX = 8 : null */
{0xFFFF, 0x0, 0x0, 0xB2, 0x40, 0x0}, /* DS_286_INDEX = 9 */
{0xFFFF, 0x0, 0x0, 0xB2, 0x40, 0x0}, /* ES_286_INDEX = 10 */
{}, /* Unused = 11 : null */
{0x7FFF, 0x8000, 0xB, 0xB2, 0x40, 0x0}, /* COLOR_INDEX = 12 */
{0x7FFF, 0x0, 0xB, 0xB2, 0x40, 0x0}, /* MONO_INDEX = 13 */
{0xFFFF, RUN, RUN, 0x9A, 0x40, 0x0}, /* DB_CS_INDEX = 14 */
{0xFFFF, RUN, RUN, 0x9A, 0x0, 0x0}, /* DB_CS16_INDEX = 15 */
{0xFFFF, RUN, RUN, 0x92, 0x40, 0x0}, /* DB_DS_INDEX = 16 */
{8*18-1, RUN, RUN, 0x92, 0x40, 0x0}, /* GDT_INDEX = 17 */
Conditionalize support for my debugger. This normally saves 304 bytes.
1994-08-30 01:38:04 +00:00
#endif /* BDE_DEBUGGER */
New boot blocks, from Bruce Evans, and NetBSD fixes. Allows kernel to be loaded above 1MB. Same boot code for floppies now. Speed improvements. etc etc etc. (I don't have much history on this, but then have been tested)
1993-07-13 18:15:32 +00:00
};
Conditionalize support for my debugger. This normally saves 304 bytes.
1994-08-30 01:38:04 +00:00
#ifdef BDE_DEBUGGER
New boot blocks, from Bruce Evans, and NetBSD fixes. Allows kernel to be loaded above 1MB. Same boot code for floppies now. Speed improvements. etc etc etc. (I don't have much history on this, but then have been tested)
1993-07-13 18:15:32 +00:00
struct idt_desc {
unsigned short entry_15_0;
unsigned short selector;
unsigned char padding;
unsigned char p_dpl_type;
unsigned short entry_31_16;
};
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
New boot blocks, from Bruce Evans, and NetBSD fixes. Allows kernel to be loaded above 1MB. Same boot code for floppies now. Speed improvements. etc etc etc. (I don't have much history on this, but then have been tested)
1993-07-13 18:15:32 +00:00
struct idt_desc Idt[] = {
{}, /* Null (int 0) */
{RUN, 0x70, 0, 0x8E, 0}, /* DEBUG_VECTOR = 1 */
{}, /* Null (int 2) */
{RUN, 0x70, 0, 0xEE, 0}, /* BREAKPOINT_VECTOR = 3 */
};
Conditionalize support for my debugger. This normally saves 304 bytes.
1994-08-30 01:38:04 +00:00
#endif /* BDE_DEBUGGER */
Initial import, 0.1 + pk 0.2.4-B1
1993-06-12 14:58:17 +00:00
struct pseudo_desc {
unsigned short limit;
unsigned short base_low;
unsigned short base_high;
};
New boot blocks, from Bruce Evans, and NetBSD fixes. Allows kernel to be loaded above 1MB. Same boot code for floppies now. Speed improvements. etc etc etc. (I don't have much history on this, but then have been tested)
1993-07-13 18:15:32 +00:00
struct pseudo_desc Gdtr = { sizeof Gdt - 1, RUN, RUN };
Conditionalize support for my debugger. This normally saves 304 bytes.
1994-08-30 01:38:04 +00:00
#ifdef BDE_DEBUGGER
New boot blocks, from Bruce Evans, and NetBSD fixes. Allows kernel to be loaded above 1MB. Same boot code for floppies now. Speed improvements. etc etc etc. (I don't have much history on this, but then have been tested)
1993-07-13 18:15:32 +00:00
struct pseudo_desc Idtr_prot = { sizeof Idt - 1, RUN, RUN };
struct pseudo_desc Idtr_real = { 0x400 - 1, 0x0, 0x0 };
Conditionalize support for my debugger. This normally saves 304 bytes.
1994-08-30 01:38:04 +00:00
#endif
Load the kernel symbol table in the boot loader and not at compile time. (Boot with the -D flag if you want symbols.) Make it easier to extend `struct bootinfo' without losing either forwards or backwards compatibility. ddb_aout.c: Get the symbol table from wherever the loader put it. Nuke db_symtab[SYMTAB_SPACE]. boot.c: Enable loading of symbols. Align them on a page boundary. Add printfs about the symbol table sizes. Pass the memory sizes to the kernel. Fix initialization of `unit' (it got moved out of the loop). Fix adding the bss size (it got moved inside an ifdef). Initialize serial port when RB_SERIAL is toggled on. Fix comments. Clean up formatting of recently added code. io.c: Clean up formatting of recently added code. netboot/main.c, machdep.c, wd.c: Change names of bootinfo fields. LINT: Nuke SYMTAB_SPACE. Fix comment about DODUMP. Makefile.i386: Nuke use of dbsym. Exclude gcc symbols from kernel unless compiling with -g. Remove unused macro. Fix comments and formatting. genassym.c: Generate defines for some new bootinfo fields. Change names of old ones. locore.s: Copy only the valid part of the `struct bootinfo' passed by the loader. Reserve space for symbol table, if any. machdep.c: Check the memory sizes passed by the loader, if any. Don't use them yet. bootinfo.h: Add a size field so that we can resolve some mismatches between the loader bootinfo and the kernel boot info. The version number is not so good for this because of historical botches and because it's harder to maintain. Add memory size and symbol table fields. Change the names of everything. Hacks to save a few bytes: asm.S, boot.c, boot2.S: Replace `ouraddr' by `(BOOTSEG << 4)'. boot.c: Don't statically initialize `loadflags' to 0. Disable the "REDUNDANT" code that skips the BIOS variables. Eliminate `total'. Combine some more printfs. boot.h, disk.c, io.c, table.c: Move all statically initialzed data to table.c. io.c: Don't put the A20 gate bits in a variable.
1995-01-25 21:40:47 +00:00
/*
* All initialized data is defined in one file to reduce space wastage from
* fragmentation.
*/
Allow specifying the BIOS drive number. Removed the hd drive type. hd essentially wired the FreeBSD drive number to 0 without changing the BIOS drive number. Now the numbers can be specified independently. Replaced the BOOT_HD compile time flag with with BOOT_HD_BIAS. Defining the new flag as 1 should give the same behaviour as defining the old flag as anything. I haven't tested defining these flags.
1996-04-07 14:28:05 +00:00
char *devs[] = { "wd", "dk", "fd", "wt", "sd", 0 };
Load the kernel symbol table in the boot loader and not at compile time. (Boot with the -D flag if you want symbols.) Make it easier to extend `struct bootinfo' without losing either forwards or backwards compatibility. ddb_aout.c: Get the symbol table from wherever the loader put it. Nuke db_symtab[SYMTAB_SPACE]. boot.c: Enable loading of symbols. Align them on a page boundary. Add printfs about the symbol table sizes. Pass the memory sizes to the kernel. Fix initialization of `unit' (it got moved out of the loop). Fix adding the bss size (it got moved inside an ifdef). Initialize serial port when RB_SERIAL is toggled on. Fix comments. Clean up formatting of recently added code. io.c: Clean up formatting of recently added code. netboot/main.c, machdep.c, wd.c: Change names of bootinfo fields. LINT: Nuke SYMTAB_SPACE. Fix comment about DODUMP. Makefile.i386: Nuke use of dbsym. Exclude gcc symbols from kernel unless compiling with -g. Remove unused macro. Fix comments and formatting. genassym.c: Generate defines for some new bootinfo fields. Change names of old ones. locore.s: Copy only the valid part of the `struct bootinfo' passed by the loader. Reserve space for symbol table, if any. machdep.c: Check the memory sizes passed by the loader, if any. Don't use them yet. bootinfo.h: Add a size field so that we can resolve some mismatches between the loader bootinfo and the kernel boot info. The version number is not so good for this because of historical botches and because it's harder to maintain. Add memory size and symbol table fields. Change the names of everything. Hacks to save a few bytes: asm.S, boot.c, boot2.S: Replace `ouraddr' by `(BOOTSEG << 4)'. boot.c: Don't statically initialize `loadflags' to 0. Disable the "REDUNDANT" code that skips the BIOS variables. Eliminate `total'. Combine some more printfs. boot.h, disk.c, io.c, table.c: Move all statically initialzed data to table.c. io.c: Don't put the A20 gate bits in a variable.
1995-01-25 21:40:47 +00:00
unsigned long tw_chars = 0x5C2D2F7C; /* "\-/|" */
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