108 lines
3.4 KiB
C
108 lines
3.4 KiB
C
/* $NetBSD: npf_ncode.h,v 1.1 2010/08/22 18:56:22 rmind Exp $ */
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/*-
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* Copyright (c) 2009-2010 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This material is based upon work partially supported by The
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* NetBSD Foundation under a contract with Mindaugas Rasiukevicius.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* NPF n-code interface.
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*
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* WARNING: Backwards compatibilty is not _yet_ maintained and instructions
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* or their codes may (or may not) change. Expect ABI breakage.
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*/
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#ifndef _NPF_NCODE_H_
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#define _NPF_NCODE_H_
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#include "npf.h"
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/* N-code processing, validation & building. */
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int npf_ncode_process(npf_cache_t *, const void *, nbuf_t *, const int);
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int npf_ncode_validate(const void *, size_t, int *);
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void * npf_ncode_alloc(size_t);
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void npf_ncode_free(void *, size_t);
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/* Error codes. */
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#define NPF_ERR_OPCODE -1 /* Invalid instruction. */
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#define NPF_ERR_JUMP -2 /* Invalid jump (e.g. out of range). */
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#define NPF_ERR_REG -3 /* Invalid register. */
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#define NPF_ERR_INVAL -4 /* Invalid argument value. */
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#define NPF_ERR_RANGE -5 /* Processing out of range. */
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/* Number of registers: [0..N] */
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#define NPF_NREGS 4
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/* Maximum loop count. */
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#define NPF_LOOP_LIMIT 100
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/* Shift to check if CISC-like instruction. */
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#define NPF_CISC_SHIFT 7
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#define NPF_CISC_OPCODE(insn) (insn >> NPF_CISC_SHIFT)
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/*
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* RISC-like n-code instructions.
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*/
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/* Return, advance, jump, tag and invalidate instructions. */
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#define NPF_OPCODE_RET 0x00
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#define NPF_OPCODE_ADVR 0x01
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#define NPF_OPCODE_J 0x02
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#define NPF_OPCODE_INVL 0x03
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#define NPF_OPCODE_TAG 0x04
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/* Set and load instructions. */
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#define NPF_OPCODE_MOV 0x10
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#define NPF_OPCODE_LOAD 0x11
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/* Compare and jump instructions. */
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#define NPF_OPCODE_CMP 0x21
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#define NPF_OPCODE_CMPR 0x22
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#define NPF_OPCODE_BEQ 0x23
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#define NPF_OPCODE_BNE 0x24
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#define NPF_OPCODE_BGT 0x25
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#define NPF_OPCODE_BLT 0x26
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/* Bitwise instructions. */
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#define NPF_OPCODE_AND 0x30
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/*
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* CISC-like n-code instructions.
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*/
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#define NPF_OPCODE_ETHER 0x80
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#define NPF_OPCODE_IP4MASK 0x90
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#define NPF_OPCODE_IP4TABLE 0x91
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#define NPF_OPCODE_ICMP4 0x92
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#define NPF_OPCODE_TCP_PORTS 0xa0
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#define NPF_OPCODE_UDP_PORTS 0xa1
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#endif
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