45949ccde1
a heavily stripped down FreeBSD/i386 (brutally stripped down actually) to attempt to get a stable base to start from. There is a lot missing still. Worth noting: - The kernel runs at 1GB in order to cheat with the pmap code. pmap uses a variation of the PAE code in order to avoid having to worry about 4 levels of page tables yet. - It boots in 64 bit "long mode" with a tiny trampoline embedded in the i386 loader. This simplifies locore.s greatly. - There are still quite a few fragments of i386-specific code that have not been translated yet, and some that I cheated and wrote dumb C versions of (bcopy etc). - It has both int 0x80 for syscalls (but using registers for argument passing, as is native on the amd64 ABI), and the 'syscall' instruction for syscalls. int 0x80 preserves all registers, 'syscall' does not. - I have tried to minimize looking at the NetBSD code, except in a couple of places (eg: to find which register they use to replace the trashed %rcx register in the syscall instruction). As a result, there is not a lot of similarity. I did look at NetBSD a few times while debugging to get some ideas about what I might have done wrong in my first attempt.
168 lines
6.2 KiB
C
168 lines
6.2 KiB
C
/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz.
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)isa.h 5.7 (Berkeley) 5/9/91
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* $FreeBSD$
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*/
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#ifndef _I386_ISA_ISA_H_
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#define _I386_ISA_ISA_H_
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/* BEWARE: Included in both assembler and C code */
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/*
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* ISA Bus conventions
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*/
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/*
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* Input / Output Port Assignments
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*/
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#ifndef IO_ISABEGIN
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#define IO_ISABEGIN 0x000 /* 0x000 - Beginning of I/O Registers */
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/* CPU Board */
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#define IO_DMA1 0x000 /* 8237A DMA Controller #1 */
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#define IO_ICU1 0x020 /* 8259A Interrupt Controller #1 */
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#define IO_PMP1 0x026 /* 82347 Power Management Peripheral */
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#define IO_TIMER1 0x040 /* 8253 Timer #1 */
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#define IO_TIMER2 0x048 /* 8253 Timer #2 */
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#define IO_KBD 0x060 /* 8042 Keyboard */
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#define IO_PPI 0x061 /* Programmable Peripheral Interface */
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#define IO_RTC 0x070 /* RTC */
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#define IO_NMI IO_RTC /* NMI Control */
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#define IO_DMAPG 0x080 /* DMA Page Registers */
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#define IO_ICU2 0x0A0 /* 8259A Interrupt Controller #2 */
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#define IO_DMA2 0x0C0 /* 8237A DMA Controller #2 */
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#define IO_NPX 0x0F0 /* Numeric Coprocessor */
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/* Cards */
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/* 0x100 - 0x16F Open */
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#define IO_WD2 0x170 /* Secondary Fixed Disk Controller */
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#define IO_PMP2 0x178 /* 82347 Power Management Peripheral */
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/* 0x17A - 0x1EF Open */
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#define IO_WD1 0x1F0 /* Primary Fixed Disk Controller */
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#define IO_GAME 0x201 /* Game Controller */
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/* 0x202 - 0x22A Open */
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#define IO_ASC2 0x22B /* AmiScan addr.grp. 2 */
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/* 0x230 - 0x26A Open */
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#define IO_ASC3 0x26B /* AmiScan addr.grp. 3 */
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#define IO_GSC1 0x270 /* -- 0x27B! GeniScan GS-4500 addr.grp. 1 */
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#define IO_LPT2 0x278 /* Parallel Port #2 */
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/* 0x280 - 0x2AA Open */
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#define IO_ASC4 0x2AB /* AmiScan addr.grp. 4 */
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/* 0x2B0 - 0x2DF Open */
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#define IO_GSC2 0x2E0 /* GeniScan GS-4500 addr.grp. 2 */
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#define IO_COM4 0x2E8 /* COM4 i/o address */
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#define IO_ASC5 0x2EB /* AmiScan addr.grp. 5 */
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/* 0x2F0 - 0x2F7 Open */
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#define IO_COM2 0x2F8 /* COM2 i/o address */
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/* 0x300 - 0x32A Open */
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#define IO_ASC6 0x32B /* AmiScan addr.grp. 6 */
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#define IO_AHA0 0x330 /* adaptec 1542 default addr. */
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#define IO_BT0 0x330 /* bustek 742a default addr. */
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#define IO_UHA0 0x330 /* ultrastore 14f default addr. */
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#define IO_AHA1 0x334 /* adaptec 1542 default addr. */
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#define IO_BT1 0x334 /* bustek 742a default addr. */
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/* 0x340 - 0x36A Open */
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#define IO_ASC7 0x36B /* AmiScan addr.grp. 7 */
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#define IO_GSC3 0x370 /* GeniScan GS-4500 addr.grp. 3 */
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#define IO_FD2 0x370 /* secondary base i/o address */
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#define IO_LPT1 0x378 /* Parallel Port #1 */
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/* 0x380 - 0x3AA Open */
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#define IO_ASC8 0x3AB /* AmiScan addr.grp. 8 */
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#define IO_MDA 0x3B0 /* Monochome Adapter */
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#define IO_LPT3 0x3BC /* Monochome Adapter Printer Port */
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#define IO_VGA 0x3C0 /* E/VGA Ports */
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#define IO_CGA 0x3D0 /* CGA Ports */
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#define IO_GSC4 0x3E0 /* GeniScan GS-4500 addr.grp. 4 */
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#define IO_COM3 0x3E8 /* COM3 i/o address */
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#define IO_ASC1 0x3EB /* AmiScan addr.grp. 1 */
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#define IO_FD1 0x3F0 /* primary base i/o address */
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#define IO_COM1 0x3F8 /* COM1 i/o address */
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#define IO_ISAEND 0x3FF /* End (actually Max) of I/O Regs */
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#endif /* !IO_ISABEGIN */
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/*
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* Input / Output Port Sizes - these are from several sources, and tend
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* to be the larger of what was found.
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*/
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#ifndef IO_ISASIZES
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#define IO_ISASIZES
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#define IO_ASCSIZE 5 /* AmiScan GI1904-based hand scanner */
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#define IO_CGASIZE 12 /* CGA controllers */
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#define IO_COMSIZE 8 /* 8250, 16x50 com controllers */
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#define IO_DMASIZE 16 /* 8237 DMA controllers */
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#define IO_DPGSIZE 32 /* 74LS612 DMA page registers */
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#define IO_FDCSIZE 8 /* Nec765 floppy controllers */
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#define IO_GAMSIZE 16 /* AT compatible game controllers */
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#define IO_GSCSIZE 8 /* GeniScan GS-4500G hand scanner */
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#define IO_ICUSIZE 16 /* 8259A interrupt controllers */
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#define IO_KBDSIZE 16 /* 8042 Keyboard controllers */
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#define IO_LPTSIZE 8 /* LPT controllers, some use only 4 */
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#define IO_MDASIZE 12 /* Monochrome display controllers */
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#define IO_NPXSIZE 16 /* 80387/80487 NPX registers */
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#define IO_PMPSIZE 2 /* 82347 power management peripheral */
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#define IO_PSMSIZE 5 /* 8042 Keyboard controllers */
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#define IO_RTCSIZE 16 /* CMOS real time clock, NMI control */
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#define IO_TMRSIZE 16 /* 8253 programmable timers */
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#define IO_VGASIZE 16 /* VGA controllers */
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#define IO_WDCSIZE 8 /* WD compatible disk controllers */
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#endif /* !IO_ISASIZES */
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#endif /* !_I386_ISA_ISA_H_ */
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