274 lines
7.5 KiB
C
274 lines
7.5 KiB
C
/* $FreeBSD$ */
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/* $NecBSD: busiosubr.c,v 1.30.4.4 1999/08/28 02:25:35 honda Exp $ */
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/* $NetBSD$ */
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/*
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* [NetBSD for NEC PC-98 series]
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* Copyright (c) 1996, 1997, 1998
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* NetBSD/pc98 porting staff. All rights reserved.
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*
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* [Ported for FreeBSD]
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* Copyright (c) 2001
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* TAKAHASHI Yoshihiro. 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. 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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/*
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* Copyright (c) 1997, 1998
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* Naofumi HONDA. All rights reserved.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <machine/bus.h>
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static MALLOC_DEFINE(M_BUSSPACEHANDLE, "busspacehandle", "Bus space handle");
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_BUS_SPACE_CALL_FUNCS_PROTO(SBUS_DA_io,u_int8_t,1)
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_BUS_SPACE_CALL_FUNCS_PROTO(SBUS_DA_io,u_int16_t,2)
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_BUS_SPACE_CALL_FUNCS_PROTO(SBUS_DA_io,u_int32_t,4)
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_BUS_SPACE_CALL_FUNCS_PROTO(SBUS_DA_mem,u_int8_t,1)
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_BUS_SPACE_CALL_FUNCS_PROTO(SBUS_DA_mem,u_int16_t,2)
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_BUS_SPACE_CALL_FUNCS_PROTO(SBUS_DA_mem,u_int32_t,4)
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_BUS_SPACE_CALL_FUNCS_PROTO(SBUS_RA_io,u_int8_t,1)
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_BUS_SPACE_CALL_FUNCS_PROTO(SBUS_RA_io,u_int16_t,2)
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_BUS_SPACE_CALL_FUNCS_PROTO(SBUS_RA_io,u_int32_t,4)
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_BUS_SPACE_CALL_FUNCS_PROTO(SBUS_RA_mem,u_int8_t,1)
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_BUS_SPACE_CALL_FUNCS_PROTO(SBUS_RA_mem,u_int16_t,2)
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_BUS_SPACE_CALL_FUNCS_PROTO(SBUS_RA_mem,u_int32_t,4)
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struct bus_space_tag SBUS_io_space_tag = {
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BUS_SPACE_IO,
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/* direct bus access methods */
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{
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_BUS_SPACE_CALL_FUNCS_TAB(SBUS_DA_io,u_int8_t,1),
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_BUS_SPACE_CALL_FUNCS_TAB(SBUS_DA_io,u_int16_t,2),
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_BUS_SPACE_CALL_FUNCS_TAB(SBUS_DA_io,u_int32_t,4),
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},
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/* relocate bus access methods */
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{
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_BUS_SPACE_CALL_FUNCS_TAB(SBUS_RA_io,u_int8_t,1),
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_BUS_SPACE_CALL_FUNCS_TAB(SBUS_RA_io,u_int16_t,2),
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_BUS_SPACE_CALL_FUNCS_TAB(SBUS_RA_io,u_int32_t,4),
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}
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};
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struct bus_space_tag SBUS_mem_space_tag = {
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BUS_SPACE_MEM,
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/* direct bus access methods */
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{
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_BUS_SPACE_CALL_FUNCS_TAB(SBUS_DA_mem,u_int8_t,1),
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_BUS_SPACE_CALL_FUNCS_TAB(SBUS_DA_mem,u_int16_t,2),
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_BUS_SPACE_CALL_FUNCS_TAB(SBUS_DA_mem,u_int32_t,4),
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},
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/* relocate bus access methods */
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{
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_BUS_SPACE_CALL_FUNCS_TAB(SBUS_RA_mem,u_int8_t,1),
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_BUS_SPACE_CALL_FUNCS_TAB(SBUS_RA_mem,u_int16_t,2),
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_BUS_SPACE_CALL_FUNCS_TAB(SBUS_RA_mem,u_int32_t,4),
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}
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};
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#include "opt_mecia.h"
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#ifdef DEV_MECIA
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_BUS_SPACE_CALL_FUNCS_PROTO(NEPC_DA_io,u_int16_t,2)
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_BUS_SPACE_CALL_FUNCS_PROTO(NEPC_DA_io,u_int32_t,4)
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_BUS_SPACE_CALL_FUNCS_PROTO(NEPC_RA_io,u_int16_t,2)
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_BUS_SPACE_CALL_FUNCS_PROTO(NEPC_RA_io,u_int32_t,4)
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struct bus_space_tag NEPC_io_space_tag = {
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BUS_SPACE_IO,
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/* direct bus access methods */
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{
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_BUS_SPACE_CALL_FUNCS_TAB(SBUS_DA_io,u_int8_t,1),
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_BUS_SPACE_CALL_FUNCS_TAB(NEPC_DA_io,u_int16_t,2),
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_BUS_SPACE_CALL_FUNCS_TAB(NEPC_DA_io,u_int32_t,4),
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},
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/* relocate bus access methods */
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{
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_BUS_SPACE_CALL_FUNCS_TAB(SBUS_RA_io,u_int8_t,1),
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_BUS_SPACE_CALL_FUNCS_TAB(NEPC_RA_io,u_int16_t,2),
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_BUS_SPACE_CALL_FUNCS_TAB(NEPC_RA_io,u_int32_t,4),
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}
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};
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struct bus_space_tag NEPC_mem_space_tag = {
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BUS_SPACE_MEM,
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/* direct bus access methods */
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{
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_BUS_SPACE_CALL_FUNCS_TAB(SBUS_DA_mem,u_int8_t,1),
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_BUS_SPACE_CALL_FUNCS_TAB(SBUS_DA_mem,u_int16_t,2),
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_BUS_SPACE_CALL_FUNCS_TAB(SBUS_DA_mem,u_int32_t,4),
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},
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/* relocate bus access methods */
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{
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_BUS_SPACE_CALL_FUNCS_TAB(SBUS_RA_mem,u_int8_t,1),
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_BUS_SPACE_CALL_FUNCS_TAB(SBUS_RA_mem,u_int16_t,2),
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_BUS_SPACE_CALL_FUNCS_TAB(SBUS_RA_mem,u_int32_t,4),
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}
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};
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#endif /* DEV_MECIA */
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/*************************************************************************
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* map init
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*************************************************************************/
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static __inline void
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bus_space_iat_init(bus_space_handle_t bsh)
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{
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int i;
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for (i = 0; i < bsh->bsh_maxiatsz; i++)
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bsh->bsh_iat[i] = bsh->bsh_base + i;
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}
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/*************************************************************************
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* handle allocation
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*************************************************************************/
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int
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i386_bus_space_handle_alloc(bus_space_tag_t t, bus_addr_t bpa, bus_size_t size,
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bus_space_handle_t *bshp)
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{
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bus_space_handle_t bsh;
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bsh = (bus_space_handle_t) malloc(sizeof (*bsh), M_BUSSPACEHANDLE,
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M_NOWAIT | M_ZERO);
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if (bsh == NULL)
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return ENOMEM;
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bsh->bsh_maxiatsz = BUS_SPACE_IAT_MAXSIZE;
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bsh->bsh_iatsz = 0;
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bsh->bsh_base = bpa;
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bsh->bsh_sz = size;
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bsh->bsh_res = NULL;
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bsh->bsh_ressz = 0;
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bus_space_iat_init(bsh);
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bsh->bsh_bam = t->bs_da; /* default: direct access */
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*bshp = bsh;
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return 0;
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}
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void
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i386_bus_space_handle_free(bus_space_tag_t t, bus_space_handle_t bsh,
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size_t size)
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{
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free(bsh, M_BUSSPACEHANDLE);
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}
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/*************************************************************************
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* map
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*************************************************************************/
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void
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i386_memio_unmap(bus_space_tag_t t, bus_space_handle_t bsh, bus_size_t size)
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{
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i386_bus_space_handle_free(t, bsh, bsh->bsh_sz);
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}
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void
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i386_memio_free(bus_space_tag_t t, bus_space_handle_t bsh, bus_size_t size)
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{
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/* i386_memio_unmap() does all that we need to do. */
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i386_memio_unmap(t, bsh, bsh->bsh_sz);
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}
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int
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i386_memio_subregion(bus_space_tag_t t, bus_space_handle_t pbsh,
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bus_size_t offset, bus_size_t size,
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bus_space_handle_t *tbshp)
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{
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int i, error = 0;
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bus_space_handle_t bsh;
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bus_addr_t pbase;
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pbase = pbsh->bsh_base + offset;
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switch (t->bs_tag) {
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case BUS_SPACE_IO:
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if (pbsh->bsh_iatsz > 0) {
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if (offset >= pbsh->bsh_iatsz ||
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offset + size > pbsh->bsh_iatsz)
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return EINVAL;
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pbase = pbsh->bsh_base;
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}
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break;
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case BUS_SPACE_MEM:
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if (pbsh->bsh_iatsz > 0)
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return EINVAL;
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if (offset > pbsh->bsh_sz || offset + size > pbsh->bsh_sz)
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return EINVAL;
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break;
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default:
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panic("i386_memio_subregion: bad bus space tag");
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break;
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}
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error = i386_bus_space_handle_alloc(t, pbase, size, &bsh);
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if (error != 0)
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return error;
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switch (t->bs_tag) {
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case BUS_SPACE_IO:
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if (pbsh->bsh_iatsz > 0) {
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for (i = 0; i < size; i ++)
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bsh->bsh_iat[i] = pbsh->bsh_iat[i + offset];
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bsh->bsh_iatsz = size;
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} else if (pbsh->bsh_base > bsh->bsh_base ||
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pbsh->bsh_base + pbsh->bsh_sz <
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bsh->bsh_base + bsh->bsh_sz) {
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i386_bus_space_handle_free(t, bsh, size);
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return EINVAL;
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}
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break;
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case BUS_SPACE_MEM:
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break;
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}
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if (pbsh->bsh_iatsz > 0)
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bsh->bsh_bam = t->bs_ra; /* relocate access */
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*tbshp = bsh;
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return error;
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}
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