220 lines
5.3 KiB
C
220 lines
5.3 KiB
C
/*
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* Instruction formats for the sequencer program downloaded to
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* Aic7xxx SCSI host adapters
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*
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* Copyright (c) 1997, 1998, 2000 Justin T. Gibbs.
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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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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*
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* $Id: //depot/aic7xxx/aic7xxx/aicasm/aicasm_insformat.h#12 $
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*
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* $FreeBSD$
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*/
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#include <asm/byteorder.h>
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/* 8bit ALU logic operations */
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struct ins_format1 {
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#ifdef __LITTLE_ENDIAN
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uint32_t immediate : 8,
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source : 9,
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destination : 9,
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ret : 1,
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opcode : 4,
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parity : 1;
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#else
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uint32_t parity : 1,
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opcode : 4,
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ret : 1,
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destination : 9,
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source : 9,
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immediate : 8;
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#endif
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};
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/* 8bit ALU shift/rotate operations */
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struct ins_format2 {
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#ifdef __LITTLE_ENDIAN
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uint32_t shift_control : 8,
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source : 9,
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destination : 9,
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ret : 1,
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opcode : 4,
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parity : 1;
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#else
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uint32_t parity : 1,
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opcode : 4,
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ret : 1,
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destination : 9,
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source : 9,
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shift_control : 8;
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#endif
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};
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/* 8bit branch control operations */
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struct ins_format3 {
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#ifdef __LITTLE_ENDIAN
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uint32_t immediate : 8,
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source : 9,
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address : 10,
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opcode : 4,
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parity : 1;
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#else
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uint32_t parity : 1,
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opcode : 4,
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address : 10,
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source : 9,
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immediate : 8;
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#endif
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};
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/* 16bit ALU logic operations */
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struct ins_format4 {
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#ifdef __LITTLE_ENDIAN
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uint32_t opcode_ext : 8,
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source : 9,
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destination : 9,
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ret : 1,
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opcode : 4,
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parity : 1;
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#else
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uint32_t parity : 1,
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opcode : 4,
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ret : 1,
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destination : 9,
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source : 9,
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opcode_ext : 8;
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#endif
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};
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/* 16bit branch control operations */
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struct ins_format5 {
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#ifdef __LITTLE_ENDIAN
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uint32_t opcode_ext : 8,
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source : 9,
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address : 10,
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opcode : 4,
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parity : 1;
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#else
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uint32_t parity : 1,
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opcode : 4,
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address : 10,
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source : 9,
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opcode_ext : 8;
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#endif
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};
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/* Far branch operations */
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struct ins_format6 {
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#ifdef __LITTLE_ENDIAN
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uint32_t page : 3,
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opcode_ext : 5,
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source : 9,
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address : 10,
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opcode : 4,
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parity : 1;
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#else
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uint32_t parity : 1,
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opcode : 4,
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address : 10,
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source : 9,
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opcode_ext : 5,
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page : 3;
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#endif
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};
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union ins_formats {
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struct ins_format1 format1;
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struct ins_format2 format2;
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struct ins_format3 format3;
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struct ins_format4 format4;
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struct ins_format5 format5;
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struct ins_format6 format6;
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uint8_t bytes[4];
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uint32_t integer;
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};
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struct instruction {
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union ins_formats format;
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u_int srcline;
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struct symbol *patch_label;
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STAILQ_ENTRY(instruction) links;
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};
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#define AIC_OP_OR 0x0
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#define AIC_OP_AND 0x1
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#define AIC_OP_XOR 0x2
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#define AIC_OP_ADD 0x3
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#define AIC_OP_ADC 0x4
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#define AIC_OP_ROL 0x5
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#define AIC_OP_BMOV 0x6
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#define AIC_OP_MVI16 0x7
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#define AIC_OP_JMP 0x8
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#define AIC_OP_JC 0x9
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#define AIC_OP_JNC 0xa
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#define AIC_OP_CALL 0xb
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#define AIC_OP_JNE 0xc
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#define AIC_OP_JNZ 0xd
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#define AIC_OP_JE 0xe
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#define AIC_OP_JZ 0xf
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/* Pseudo Ops */
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#define AIC_OP_SHL 0x10
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#define AIC_OP_SHR 0x20
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#define AIC_OP_ROR 0x30
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/* 16bit Ops. Low byte main opcode. High byte extended opcode. */
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#define AIC_OP_OR16 0x8005
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#define AIC_OP_AND16 0x8105
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#define AIC_OP_XOR16 0x8205
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#define AIC_OP_ADD16 0x8305
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#define AIC_OP_ADC16 0x8405
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#define AIC_OP_JNE16 0x8805
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#define AIC_OP_JNZ16 0x8905
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#define AIC_OP_JE16 0x8C05
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#define AIC_OP_JZ16 0x8B05
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#define AIC_OP_JMP16 0x9005
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#define AIC_OP_JC16 0x9105
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#define AIC_OP_JNC16 0x9205
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#define AIC_OP_CALL16 0x9305
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#define AIC_OP_CALL16 0x9305
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/* Page extension is low three bits of second opcode byte. */
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#define AIC_OP_JMPF 0xA005
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#define AIC_OP_CALLF 0xB005
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#define AIC_OP_JCF 0xC005
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#define AIC_OP_JNCF 0xD005
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#define AIC_OP_CMPXCHG 0xE005
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