1/*
  2 * Instruction formats for the sequencer program downloaded to
  3 * Aic7xxx SCSI host adapters
  4 *
  5 * Copyright (c) 1997, 1998 Justin T. Gibbs.
  6 * All rights reserved.
  7 *
  8 * Redistribution and use in source and binary forms, with or without
  9 * modification, are permitted provided that the following conditions
 10 * are met:
 11 * 1. Redistributions of source code must retain the above copyright
 12 *    notice, this list of conditions, and the following disclaimer,
 13 *    without modification, immediately at the beginning of the file.
 14 * 2. The name of the author may not be used to endorse or promote products
 15 *    derived from this software without specific prior written permission.
 16 *
 17 * Where this Software is combined with software released under the terms of 
 18 * the GNU General Public License ("GPL") and the terms of the GPL would require the 
 19 * combined work to also be released under the terms of the GPL, the terms
 20 * and conditions of this License will apply in addition to those of the
 21 * GPL with the exception of any terms or conditions of this License that
 22 * conflict with, or are expressly prohibited by, the GPL.
 23 *
 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
 28 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 34 * SUCH DAMAGE.
 35 *
 36 *      $Id: sequencer.h,v 1.3 1997/09/27 19:37:31 gibbs Exp $
 37 */
 38
 39#ifdef __LITTLE_ENDIAN_BITFIELD
 40struct ins_format1 {
 41	unsigned int
 42			immediate	: 8,
 43			source		: 9,
 44			destination	: 9,
 45			ret		: 1,
 46			opcode		: 4,
 47			parity		: 1;
 48};
 49
 50struct ins_format2 {
 51	unsigned int
 52			shift_control	: 8,
 53			source		: 9,
 54			destination	: 9,
 55			ret		: 1,
 56			opcode		: 4,
 57			parity		: 1;
 58};
 59
 60struct ins_format3 {
 61	unsigned int
 62			immediate	: 8,
 63			source		: 9,
 64			address		: 10,
 65			opcode		: 4,
 66			parity		: 1;
 67};
 68#elif defined(__BIG_ENDIAN_BITFIELD)
 69struct ins_format1 {
 70	unsigned int
 71			parity		: 1,
 72			opcode		: 4,
 73			ret		: 1,
 74			destination	: 9,
 75			source		: 9,
 76			immediate	: 8;
 77};
 78
 79struct ins_format2 {
 80	unsigned int
 81			parity		: 1,
 82			opcode		: 4,
 83			ret		: 1,
 84			destination	: 9,
 85			source		: 9,
 86			shift_control	: 8;
 87};
 88
 89struct ins_format3 {
 90	unsigned int
 91			parity		: 1,
 92			opcode		: 4,
 93			address		: 10,
 94			source		: 9,
 95			immediate	: 8;
 96};
 97#endif
 98
 99union ins_formats {
100		struct ins_format1 format1;
101		struct ins_format2 format2;
102		struct ins_format3 format3;
103		unsigned char	   bytes[4];
104		unsigned int	   integer;
105};
106struct instruction {
107	union	ins_formats format;
108	unsigned int	srcline;
109	struct symbol *patch_label;
110  struct {
111    struct instruction *stqe_next;
112  } links;
113};
114
115#define	AIC_OP_OR	0x0
116#define	AIC_OP_AND	0x1
117#define AIC_OP_XOR	0x2
118#define	AIC_OP_ADD	0x3
119#define	AIC_OP_ADC	0x4
120#define	AIC_OP_ROL	0x5
121#define	AIC_OP_BMOV	0x6
122
123#define	AIC_OP_JMP	0x8
124#define AIC_OP_JC	0x9
125#define AIC_OP_JNC	0xa
126#define AIC_OP_CALL	0xb
127#define	AIC_OP_JNE	0xc
128#define	AIC_OP_JNZ	0xd
129#define	AIC_OP_JE	0xe
130#define	AIC_OP_JZ	0xf
131
132/* Pseudo Ops */
133#define	AIC_OP_SHL	0x10
134#define	AIC_OP_SHR	0x20
135#define	AIC_OP_ROR	0x30