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144 lines
5.3 KiB
C
144 lines
5.3 KiB
C
/* $Id: m68k.h,v 1.8 2009/08/29 18:02:48 fredette Exp $ */
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/* tme/ic/m68k.h - public header file for Motorola 68k emulation */
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/*
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* Copyright (c) 2002, 2003 Matt Fredette
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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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* 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 Matt Fredette.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* 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 IN
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* 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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#ifndef _TME_IC_M68K_H
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#define _TME_IC_M68K_H
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#include <tme/common.h>
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_TME_RCSID("$Id: m68k.h,v 1.8 2009/08/29 18:02:48 fredette Exp $");
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/* includes: */
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#include <tme/element.h>
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#include <tme/generic/bus.h>
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/* macros: */
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/* function codes: */
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#define TME_M68K_FC_0 (0)
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#define TME_M68K_FC_UD (1)
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#define TME_M68K_FC_UP (2)
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#define TME_M68K_FC_3 (3)
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#define TME_M68K_FC_4 (4)
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#define TME_M68K_FC_SD (5)
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#define TME_M68K_FC_SP (6)
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#define TME_M68K_FC_7 (7)
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/* the minimum and maximum IPL levels: */
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#define TME_M68K_IPL_NONE (0)
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#define TME_M68K_IPL_MIN (1)
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#define TME_M68K_IPL_MAX (7)
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#define TME_M68K_IPL_NMI (7)
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/* these busy and unbusy a TLB entry: */
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#define tme_m68k_tlb_busy(tlb) \
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tme_token_busy(&(tlb)->tme_m68k_tlb_token)
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#define tme_m68k_tlb_unbusy(tlb) \
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tme_token_unbusy(&(tlb)->tme_m68k_tlb_token)
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/* these test the validity of a TLB entry: */
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#define tme_m68k_tlb_is_valid(tlb) \
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tme_token_is_valid(&(tlb)->tme_m68k_tlb_token)
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#define tme_m68k_tlb_is_invalid(tlb) \
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tme_token_is_invalid(&(tlb)->tme_m68k_tlb_token)
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/* this indexes an m68k bus router array for an m68k with a port size
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of 8 * (2 ^ siz_lg2) bits: */
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#define TME_M68K_BUS_ROUTER_INDEX(siz_lg2, cycle_size, address) \
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((( \
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/* by the maximum cycle size: */ \
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((cycle_size) - 1) \
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\
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/* by the address alignment: */ \
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<< siz_lg2) \
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+ ((address) & ((1 << (siz_lg2)) - 1))) \
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\
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/* factor in the size of the generic bus router array: */ \
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* TME_BUS_ROUTER_SIZE(siz_lg2))
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/* this gives the number of entries that must be in a generic bus
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router array for a device with a bus size of 8 * (2 ^ siz_lg2)
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bits: */
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#define TME_M68K_BUS_ROUTER_SIZE(siz_lg2) \
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TME_M68K_BUS_ROUTER_INDEX(siz_lg2, (1 << (siz_lg2)) + 1, 0)
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/* structures: */
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/* an m68k TLB entry: */
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struct tme_m68k_tlb {
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/* the generic bus TLB associated with this TLB entry: */
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struct tme_bus_tlb tme_m68k_tlb_bus_tlb;
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#define tme_m68k_tlb_linear_first tme_m68k_tlb_bus_tlb.tme_bus_tlb_addr_first
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#define tme_m68k_tlb_linear_last tme_m68k_tlb_bus_tlb.tme_bus_tlb_addr_last
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#define tme_m68k_tlb_bus_rwlock tme_m68k_tlb_bus_tlb.tme_bus_tlb_rwlock
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#define tme_m68k_tlb_cycles_ok tme_m68k_tlb_bus_tlb.tme_bus_tlb_cycles_ok
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#define tme_m68k_tlb_addr_offset tme_m68k_tlb_bus_tlb.tme_bus_tlb_addr_offset
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#define tme_m68k_tlb_addr_shift tme_m68k_tlb_bus_tlb.tme_bus_tlb_addr_shift
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#define tme_m68k_tlb_emulator_off_read tme_m68k_tlb_bus_tlb.tme_bus_tlb_emulator_off_read
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#define tme_m68k_tlb_emulator_off_write tme_m68k_tlb_bus_tlb.tme_bus_tlb_emulator_off_write
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/* the token for this TLB entry: */
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struct tme_token tme_m68k_tlb_token;
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/* the bus context for this TLB entry: */
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tme_bus_context_t tme_m68k_tlb_bus_context;
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/* the function codes handled by this entry: */
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unsigned int tme_m68k_tlb_function_codes_mask;
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};
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/* an m68k bus connection: */
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struct tme_m68k_bus_connection {
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/* a generic bus connection: */
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struct tme_bus_connection tme_m68k_bus_connection;
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/* the m68k interrupt function: */
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int (*tme_m68k_bus_interrupt) _TME_P((struct tme_m68k_bus_connection *, unsigned int));
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/* the m68k TLB entry filler: */
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int (*tme_m68k_bus_tlb_fill) _TME_P((struct tme_m68k_bus_connection *, struct tme_m68k_tlb *,
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unsigned int, tme_uint32_t, unsigned int));
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/* the m68k m6888x enabler: */
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int (*tme_m68k_bus_m6888x_enable) _TME_P((struct tme_m68k_bus_connection *, int));
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};
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/* globals: */
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extern _tme_const tme_bus_lane_t tme_m68k_router_16[];
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extern _tme_const tme_bus_lane_t tme_m68k_router_32[];
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#endif /* !_TME_IC_M68K_H */
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