mainbus_io.c revision 1.1
1 /* $NetBSD: mainbus_io.c,v 1.1 2001/02/24 19:38:02 reinoud Exp $ */ 2 3 /* 4 * Copyright (c) 1997 Mark Brinicombe. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Mark Brinicombe. 18 * 4. The name of the company nor the name of the author may be used to 19 * endorse or promote products derived from this software without specific 20 * prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 26 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 27 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 /* 36 * bus_space I/O functions for mainbus 37 */ 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/queue.h> 42 43 #include <uvm/uvm.h> 44 45 #include <machine/bus.h> 46 #include <machine/pmap.h> 47 #include <machine/pte.h> 48 49 pt_entry_t *pmap_pte(pmap_t, vm_offset_t); 50 51 /* Proto types for all the bus_space structure functions */ 52 53 bs_protos(mainbus); 54 bs_protos(bs_notimpl); 55 56 /* Declare the mainbus bus space tag */ 57 58 struct bus_space mainbus_bs_tag = { 59 /* cookie */ 60 NULL, 61 62 /* mapping/unmapping */ 63 mainbus_bs_map, 64 mainbus_bs_unmap, 65 mainbus_bs_subregion, 66 67 /* allocation/deallocation */ 68 mainbus_bs_alloc, 69 mainbus_bs_free, 70 71 /* get kernel virtual address */ 72 0, /* there is no linear mapping */ 73 74 /* barrier */ 75 mainbus_bs_barrier, 76 77 /* read (single) */ 78 mainbus_bs_r_1, 79 mainbus_bs_r_2, 80 mainbus_bs_r_4, 81 bs_notimpl_bs_r_8, 82 83 /* read multiple */ 84 bs_notimpl_bs_rm_1, 85 mainbus_bs_rm_2, 86 bs_notimpl_bs_rm_4, 87 bs_notimpl_bs_rm_8, 88 89 /* read region */ 90 bs_notimpl_bs_rr_1, 91 bs_notimpl_bs_rr_2, 92 bs_notimpl_bs_rr_4, 93 bs_notimpl_bs_rr_8, 94 95 /* write (single) */ 96 mainbus_bs_w_1, 97 mainbus_bs_w_2, 98 mainbus_bs_w_4, 99 bs_notimpl_bs_w_8, 100 101 /* write multiple */ 102 mainbus_bs_wm_1, 103 mainbus_bs_wm_2, 104 bs_notimpl_bs_wm_4, 105 bs_notimpl_bs_wm_8, 106 107 /* write region */ 108 bs_notimpl_bs_wr_1, 109 bs_notimpl_bs_wr_2, 110 bs_notimpl_bs_wr_4, 111 bs_notimpl_bs_wr_8, 112 113 bs_notimpl_bs_sm_1, 114 bs_notimpl_bs_sm_2, 115 bs_notimpl_bs_sm_4, 116 bs_notimpl_bs_sm_8, 117 118 /* set region */ 119 bs_notimpl_bs_sr_1, 120 bs_notimpl_bs_sr_2, 121 bs_notimpl_bs_sr_4, 122 bs_notimpl_bs_sr_8, 123 124 /* copy */ 125 bs_notimpl_bs_c_1, 126 bs_notimpl_bs_c_2, 127 bs_notimpl_bs_c_4, 128 bs_notimpl_bs_c_8, 129 }; 130 131 /* bus space functions */ 132 133 int 134 mainbus_bs_map(t, bpa, size, cacheable, bshp) 135 void *t; 136 bus_addr_t bpa; 137 bus_size_t size; 138 int cacheable; 139 bus_space_handle_t *bshp; 140 { 141 u_long startpa, endpa, pa; 142 vaddr_t va; 143 pt_entry_t *pte; 144 145 if ((u_long)bpa > (u_long)KERNEL_SPACE_START) { 146 /* XXX This is a temporary hack to aid transition. */ 147 *bshp = bpa; 148 return(0); 149 } 150 151 startpa = trunc_page(bpa); 152 endpa = round_page(bpa + size); 153 154 /* XXX use extent manager to check duplicate mapping */ 155 156 va = uvm_km_valloc(kernel_map, endpa - startpa); 157 if (! va) 158 return(ENOMEM); 159 160 *bshp = (bus_space_handle_t)(va + (bpa - startpa)); 161 162 for(pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) { 163 pmap_kenter_pa(va, pa, VM_PROT_READ | VM_PROT_WRITE); 164 pte = pmap_pte(kernel_pmap, va); 165 if (cacheable) 166 *pte |= PT_CACHEABLE; 167 else 168 *pte &= ~PT_CACHEABLE; 169 } 170 171 return(0); 172 } 173 174 int 175 mainbus_bs_alloc(t, rstart, rend, size, alignment, boundary, cacheable, 176 bpap, bshp) 177 void *t; 178 bus_addr_t rstart, rend; 179 bus_size_t size, alignment, boundary; 180 int cacheable; 181 bus_addr_t *bpap; 182 bus_space_handle_t *bshp; 183 { 184 panic("mainbus_bs_alloc(): Help!\n"); 185 } 186 187 188 void 189 mainbus_bs_unmap(t, bsh, size) 190 void *t; 191 bus_space_handle_t bsh; 192 bus_size_t size; 193 { 194 /* 195 * Temporary implementation 196 */ 197 } 198 199 void 200 mainbus_bs_free(t, bsh, size) 201 void *t; 202 bus_space_handle_t bsh; 203 bus_size_t size; 204 { 205 206 panic("mainbus_bs_free(): Help!\n"); 207 /* mainbus_bs_unmap() does all that we need to do. */ 208 /* mainbus_bs_unmap(t, bsh, size);*/ 209 } 210 211 int 212 mainbus_bs_subregion(t, bsh, offset, size, nbshp) 213 void *t; 214 bus_space_handle_t bsh; 215 bus_size_t offset, size; 216 bus_space_handle_t *nbshp; 217 { 218 219 *nbshp = bsh + offset; 220 return (0); 221 } 222 223 void 224 mainbus_bs_barrier(t, bsh, offset, len, flags) 225 void *t; 226 bus_space_handle_t bsh; 227 bus_size_t offset, len; 228 int flags; 229 { 230 } 231 232 /* End of mainbus_io.c */ 233
Indexes created Wed Sep 24 05:09:52 GMT 2025