/* $OpenBSD: isa_io.c,v 1.1 2004/02/01 05:09:49 drahn Exp $ */ /* $NetBSD: isa_io.c,v 1.2 2002/09/27 15:35:44 provos Exp $ */ /* * Copyright 1997 * Digital Equipment Corporation. All rights reserved. * * This software is furnished under license and may be used and * copied only in accordance with the following terms and conditions. * Subject to these conditions, you may download, copy, install, * use, modify and distribute this software in source and/or binary * form. No title or ownership is transferred hereby. * * 1) Any source code used, modified or distributed must reproduce * and retain this copyright notice and list of conditions as * they appear in the source file. * * 2) No right is granted to use any trade name, trademark, or logo of * Digital Equipment Corporation. Neither the "Digital Equipment * Corporation" name nor any trademark or logo of Digital Equipment * Corporation may be used to endorse or promote products derived * from this software without the prior written permission of * Digital Equipment Corporation. * * 3) This software is provided "AS-IS" and any express or implied * warranties, including but not limited to, any implied warranties * of merchantability, fitness for a particular purpose, or * non-infringement are disclaimed. In no event shall DIGITAL be * liable for any damages whatsoever, and in particular, DIGITAL * shall not be liable for special, indirect, consequential, or * incidental damages or damages for lost profits, loss of * revenue or loss of use, whether such damages arise in contract, * negligence, tort, under statute, in equity, at law or otherwise, * even if advised of the possibility of such damage. */ /* * bus_space I/O functions for isa */ #include #include #include #include #include /* Proto types for all the bus_space structure functions */ bs_protos(isa); bs_protos(bs_notimpl); /* * Declare the isa bus space tags * The IO and MEM structs are identical, except for the cookies, * which contain the address space bases. */ /* * NOTE: ASSEMBLY LANGUAGE RELIES ON THE COOKIE -- THE FIRST MEMBER OF * THIS STRUCTURE -- TO BE THE VIRTUAL ADDRESS OF ISA/IO! */ struct bus_space isa_io_bs_tag = { /* cookie */ NULL, /* initialized below */ /* mapping/unmapping */ isa_bs_map, isa_bs_unmap, isa_bs_subregion, /* allocation/deallocation */ isa_bs_alloc, isa_bs_free, /* get kernel virtual address */ isa_bs_vaddr, /* mmap bus space for userland */ bs_notimpl_bs_mmap, /* XXX possible even? XXX */ /* barrier */ isa_bs_barrier, /* read (single) */ isa_bs_r_1, isa_bs_r_2, isa_bs_r_4, bs_notimpl_bs_r_8, /* read multiple */ isa_bs_rm_1, isa_bs_rm_2, isa_bs_rm_4, bs_notimpl_bs_rm_8, /* read region */ isa_bs_rr_1, isa_bs_rr_2, isa_bs_rr_4, bs_notimpl_bs_rr_8, /* write (single) */ isa_bs_w_1, isa_bs_w_2, isa_bs_w_4, bs_notimpl_bs_w_8, /* write multiple */ isa_bs_wm_1, isa_bs_wm_2, isa_bs_wm_4, bs_notimpl_bs_wm_8, /* write region */ isa_bs_wr_1, isa_bs_wr_2, isa_bs_wr_4, bs_notimpl_bs_wr_8, /* set multiple */ bs_notimpl_bs_sm_1, bs_notimpl_bs_sm_2, bs_notimpl_bs_sm_4, bs_notimpl_bs_sm_8, /* set region */ bs_notimpl_bs_sr_1, isa_bs_sr_2, bs_notimpl_bs_sr_4, bs_notimpl_bs_sr_8, /* copy */ bs_notimpl_bs_c_1, bs_notimpl_bs_c_2, bs_notimpl_bs_c_4, bs_notimpl_bs_c_8, }; /* * NOTE: ASSEMBLY LANGUAGE RELIES ON THE COOKIE -- THE FIRST MEMBER OF * THIS STRUCTURE -- TO BE THE VIRTUAL ADDRESS OF ISA/MEMORY! */ struct bus_space isa_mem_bs_tag = { /* cookie */ NULL, /* initialized below */ /* mapping/unmapping */ isa_bs_map, isa_bs_unmap, isa_bs_subregion, /* allocation/deallocation */ isa_bs_alloc, isa_bs_free, /* get kernel virtual address */ isa_bs_vaddr, /* mmap bus space for userland */ bs_notimpl_bs_mmap, /* XXX open for now ... XXX */ /* barrier */ isa_bs_barrier, /* read (single) */ isa_bs_r_1, isa_bs_r_2, isa_bs_r_4, bs_notimpl_bs_r_8, /* read multiple */ isa_bs_rm_1, isa_bs_rm_2, isa_bs_rm_4, bs_notimpl_bs_rm_8, /* read region */ isa_bs_rr_1, isa_bs_rr_2, isa_bs_rr_4, bs_notimpl_bs_rr_8, /* write (single) */ isa_bs_w_1, isa_bs_w_2, isa_bs_w_4, bs_notimpl_bs_w_8, /* write multiple */ isa_bs_wm_1, isa_bs_wm_2, isa_bs_wm_4, bs_notimpl_bs_wm_8, /* write region */ isa_bs_wr_1, isa_bs_wr_2, isa_bs_wr_4, bs_notimpl_bs_wr_8, /* set multiple */ bs_notimpl_bs_sm_1, bs_notimpl_bs_sm_2, bs_notimpl_bs_sm_4, bs_notimpl_bs_sm_8, /* set region */ bs_notimpl_bs_sr_1, isa_bs_sr_2, bs_notimpl_bs_sr_4, bs_notimpl_bs_sr_8, /* copy */ bs_notimpl_bs_c_1, bs_notimpl_bs_c_2, bs_notimpl_bs_c_4, bs_notimpl_bs_c_8, }; /* bus space functions */ void isa_io_init(isa_io_addr, isa_mem_addr) vm_offset_t isa_io_addr; vm_offset_t isa_mem_addr; { isa_io_bs_tag.bs_cookie = (void *)isa_io_addr; isa_mem_bs_tag.bs_cookie = (void *)isa_mem_addr; } /* * break the abstraction: sometimes, other parts of the system * (e.g. X servers) need to map ISA space directly. use these * functions sparingly! */ vm_offset_t isa_io_data_vaddr(void) { return (vm_offset_t)isa_io_bs_tag.bs_cookie; } vm_offset_t isa_mem_data_vaddr(void) { return (vm_offset_t)isa_mem_bs_tag.bs_cookie; } int isa_bs_map(t, bpa, size, cacheable, bshp) void *t; bus_addr_t bpa; bus_size_t size; int cacheable; bus_space_handle_t *bshp; { *bshp = bpa + (bus_addr_t)t; return(0); } void isa_bs_unmap(t, bsh, size) void *t; bus_space_handle_t bsh; bus_size_t size; { /* Nothing to do. */ } int isa_bs_subregion(t, bsh, offset, size, nbshp) void *t; bus_space_handle_t bsh; bus_size_t offset, size; bus_space_handle_t *nbshp; { /* printf("isa_subregion(tag=%p, bsh=%lx, off=%lx, sz=%lx)\n", t, bsh, offset, size);*/ *nbshp = bsh + offset; return(0); } int isa_bs_alloc(t, rstart, rend, size, alignment, boundary, cacheable, bpap, bshp) void *t; bus_addr_t rstart, rend; bus_size_t size, alignment, boundary; int cacheable; bus_addr_t *bpap; bus_space_handle_t *bshp; { panic("isa_alloc(): Help!"); } void isa_bs_free(t, bsh, size) void *t; bus_space_handle_t bsh; bus_size_t size; { panic("isa_free(): Help!"); } void * isa_bs_vaddr(t, bsh) void *t; bus_space_handle_t bsh; { return ((void *)bsh); } void isa_bs_barrier(t, bsh, offset, len, flags) void *t; bus_space_handle_t bsh; bus_size_t offset, len; int flags; { /* just return */ }