315 lines
6.2 KiB
C
315 lines
6.2 KiB
C
/* $NetBSD: isa_io.c,v 1.7 2000/04/17 17:39:18 drochner Exp $ */
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/*
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* Copyright 1997
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* Digital Equipment Corporation. All rights reserved.
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*
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* This software is furnished under license and may be used and
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* copied only in accordance with the following terms and conditions.
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* Subject to these conditions, you may download, copy, install,
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* use, modify and distribute this software in source and/or binary
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* form. No title or ownership is transferred hereby.
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*
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* 1) Any source code used, modified or distributed must reproduce
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* and retain this copyright notice and list of conditions as
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* they appear in the source file.
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*
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* 2) No right is granted to use any trade name, trademark, or logo of
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* Digital Equipment Corporation. Neither the "Digital Equipment
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* Corporation" name nor any trademark or logo of Digital Equipment
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* Corporation may be used to endorse or promote products derived
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* from this software without the prior written permission of
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* Digital Equipment Corporation.
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*
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* 3) This software is provided "AS-IS" and any express or implied
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* warranties, including but not limited to, any implied warranties
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* of merchantability, fitness for a particular purpose, or
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* non-infringement are disclaimed. In no event shall DIGITAL be
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* liable for any damages whatsoever, and in particular, DIGITAL
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* shall not be liable for special, indirect, consequential, or
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* incidental damages or damages for lost profits, loss of
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* revenue or loss of use, whether such damages arise in contract,
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* negligence, tort, under statute, in equity, at law or otherwise,
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* even if advised of the possibility of such damage.
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*/
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/*
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* bus_space I/O functions for isa
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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 <machine/bus.h>
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#include <machine/pio.h>
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#include <machine/isa_machdep.h>
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/* Proto types for all the bus_space structure functions */
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bs_protos(isa);
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bs_protos(bs_notimpl);
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/*
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* Declare the isa bus space tags
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* The IO and MEM structs are identical, except for the cookies,
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* which contain the address space bases.
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*/
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/*
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* NOTE: ASSEMBLY LANGUAGE RELIES ON THE COOKIE -- THE FIRST MEMBER OF
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* THIS STRUCTURE -- TO BE THE VIRTUAL ADDRESS OF ISA/IO!
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*/
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struct bus_space isa_io_bs_tag = {
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/* cookie */
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NULL, /* initialized below */
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/* mapping/unmapping */
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isa_bs_map,
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isa_bs_unmap,
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isa_bs_subregion,
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/* allocation/deallocation */
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isa_bs_alloc,
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isa_bs_free,
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/* get kernel virtual address */
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isa_bs_vaddr,
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/* barrier */
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isa_bs_barrier,
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/* read (single) */
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isa_bs_r_1,
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isa_bs_r_2,
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isa_bs_r_4,
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bs_notimpl_bs_r_8,
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/* read multiple */
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isa_bs_rm_1,
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isa_bs_rm_2,
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isa_bs_rm_4,
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bs_notimpl_bs_rm_8,
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/* read region */
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isa_bs_rr_1,
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isa_bs_rr_2,
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isa_bs_rr_4,
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bs_notimpl_bs_rr_8,
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/* write (single) */
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isa_bs_w_1,
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isa_bs_w_2,
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isa_bs_w_4,
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bs_notimpl_bs_w_8,
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/* write multiple */
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isa_bs_wm_1,
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isa_bs_wm_2,
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isa_bs_wm_4,
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bs_notimpl_bs_wm_8,
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/* write region */
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isa_bs_wr_1,
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isa_bs_wr_2,
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isa_bs_wr_4,
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bs_notimpl_bs_wr_8,
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/* set multiple */
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bs_notimpl_bs_sm_1,
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bs_notimpl_bs_sm_2,
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bs_notimpl_bs_sm_4,
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bs_notimpl_bs_sm_8,
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/* set region */
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bs_notimpl_bs_sr_1,
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isa_bs_sr_2,
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bs_notimpl_bs_sr_4,
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bs_notimpl_bs_sr_8,
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/* copy */
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bs_notimpl_bs_c_1,
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bs_notimpl_bs_c_2,
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bs_notimpl_bs_c_4,
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bs_notimpl_bs_c_8,
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};
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/*
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* NOTE: ASSEMBLY LANGUAGE RELIES ON THE COOKIE -- THE FIRST MEMBER OF
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* THIS STRUCTURE -- TO BE THE VIRTUAL ADDRESS OF ISA/MEMORY!
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*/
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struct bus_space isa_mem_bs_tag = {
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/* cookie */
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NULL, /* initialized below */
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/* mapping/unmapping */
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isa_bs_map,
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isa_bs_unmap,
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isa_bs_subregion,
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/* allocation/deallocation */
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isa_bs_alloc,
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isa_bs_free,
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/* get kernel virtual address */
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isa_bs_vaddr,
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/* barrier */
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isa_bs_barrier,
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/* read (single) */
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isa_bs_r_1,
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isa_bs_r_2,
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isa_bs_r_4,
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bs_notimpl_bs_r_8,
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/* read multiple */
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isa_bs_rm_1,
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isa_bs_rm_2,
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isa_bs_rm_4,
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bs_notimpl_bs_rm_8,
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/* read region */
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isa_bs_rr_1,
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isa_bs_rr_2,
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isa_bs_rr_4,
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bs_notimpl_bs_rr_8,
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/* write (single) */
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isa_bs_w_1,
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isa_bs_w_2,
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isa_bs_w_4,
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bs_notimpl_bs_w_8,
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/* write multiple */
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isa_bs_wm_1,
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isa_bs_wm_2,
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isa_bs_wm_4,
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bs_notimpl_bs_wm_8,
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/* write region */
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isa_bs_wr_1,
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isa_bs_wr_2,
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isa_bs_wr_4,
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bs_notimpl_bs_wr_8,
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/* set multiple */
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bs_notimpl_bs_sm_1,
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bs_notimpl_bs_sm_2,
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bs_notimpl_bs_sm_4,
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bs_notimpl_bs_sm_8,
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/* set region */
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bs_notimpl_bs_sr_1,
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isa_bs_sr_2,
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bs_notimpl_bs_sr_4,
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bs_notimpl_bs_sr_8,
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/* copy */
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bs_notimpl_bs_c_1,
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bs_notimpl_bs_c_2,
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bs_notimpl_bs_c_4,
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bs_notimpl_bs_c_8,
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};
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/* bus space functions */
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void
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isa_io_init(isa_io_addr, isa_mem_addr)
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vm_offset_t isa_io_addr;
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vm_offset_t isa_mem_addr;
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{
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isa_io_bs_tag.bs_cookie = (void *)isa_io_addr;
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isa_mem_bs_tag.bs_cookie = (void *)isa_mem_addr;
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}
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/*
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* break the abstraction: sometimes, other parts of the system
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* (e.g. X servers) need to map ISA space directly. use these
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* functions sparingly!
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*/
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vm_offset_t
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isa_io_data_vaddr(void)
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{
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return (vm_offset_t)isa_io_bs_tag.bs_cookie;
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}
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vm_offset_t
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isa_mem_data_vaddr(void)
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{
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return (vm_offset_t)isa_mem_bs_tag.bs_cookie;
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}
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int
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isa_bs_map(t, bpa, size, cacheable, bshp)
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void *t;
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bus_addr_t bpa;
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bus_size_t size;
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int cacheable;
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bus_space_handle_t *bshp;
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{
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*bshp = bpa + (bus_addr_t)t;
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return(0);
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}
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void
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isa_bs_unmap(t, bsh, size)
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void *t;
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bus_space_handle_t bsh;
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bus_size_t size;
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{
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/* Nothing to do. */
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}
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int
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isa_bs_subregion(t, bsh, offset, size, nbshp)
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void *t;
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bus_space_handle_t bsh;
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bus_size_t offset, size;
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bus_space_handle_t *nbshp;
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{
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/* printf("isa_subregion(tag=%p, bsh=%lx, off=%lx, sz=%lx)\n",
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t, bsh, offset, size);*/
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*nbshp = bsh + offset;
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return(0);
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}
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int
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isa_bs_alloc(t, rstart, rend, size, alignment, boundary, cacheable,
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bpap, bshp)
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void *t;
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bus_addr_t rstart, rend;
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bus_size_t size, alignment, boundary;
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int cacheable;
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bus_addr_t *bpap;
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bus_space_handle_t *bshp;
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{
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panic("isa_alloc(): Help!\n");
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}
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void
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isa_bs_free(t, bsh, size)
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void *t;
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bus_space_handle_t bsh;
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bus_size_t size;
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{
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panic("isa_free(): Help!\n");
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}
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void *
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isa_bs_vaddr(t, bsh)
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void *t;
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bus_space_handle_t bsh;
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{
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return ((void *)bsh);
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}
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void
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isa_bs_barrier(t, bsh, offset, len, flags)
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void *t;
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bus_space_handle_t bsh;
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bus_size_t offset, len;
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int flags;
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{
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/* just return */
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}
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