ifpga_io.c revision 1.1.4.2
1 /* $NetBSD: ifpga_io.c,v 1.1.4.2 2002/01/10 19:42:05 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1997 Causality Limited 5 * Copyright (c) 1997 Mark Brinicombe. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Mark Brinicombe 19 * for the NetBSD Project. 20 * 4. The name of the company nor the name of the author may be used to 21 * endorse or promote products derived from this software without specific 22 * prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 25 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 26 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 27 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 28 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 29 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 30 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * From arm/footbridge/footbridge_io.c 37 */ 38 39 /* 40 * bus_space I/O functions for IFPGA 41 */ 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <machine/bus.h> 46 #include <uvm/uvm_extern.h> 47 48 /* Proto types for all the bus_space structure functions */ 49 50 bs_protos(ifpga); 51 bs_protos(bs_notimpl); 52 bs_map_proto(ifpga_mem); 53 bs_unmap_proto(ifpga_mem); 54 55 /* Declare the ifpga bus space tag */ 56 57 struct bus_space ifpga_bs_tag = { 58 /* cookie */ 59 (void *) 0, /* Physical base address */ 60 61 /* mapping/unmapping */ 62 ifpga_bs_map, 63 ifpga_bs_unmap, 64 ifpga_bs_subregion, 65 66 /* allocation/deallocation */ 67 ifpga_bs_alloc, 68 ifpga_bs_free, 69 70 /* get kernel virtual address */ 71 ifpga_bs_vaddr, 72 73 /* mmap */ 74 bs_notimpl_bs_mmap, 75 76 /* barrier */ 77 ifpga_bs_barrier, 78 79 /* read (single) */ 80 ifpga_bs_r_1, 81 ifpga_bs_r_2, 82 ifpga_bs_r_4, 83 bs_notimpl_bs_r_8, 84 85 /* read multiple */ 86 ifpga_bs_rm_1, 87 ifpga_bs_rm_2, 88 ifpga_bs_rm_4, 89 bs_notimpl_bs_rm_8, 90 91 /* read region */ 92 bs_notimpl_bs_rr_1, 93 ifpga_bs_rr_2, 94 ifpga_bs_rr_4, 95 bs_notimpl_bs_rr_8, 96 97 /* write (single) */ 98 ifpga_bs_w_1, 99 ifpga_bs_w_2, 100 ifpga_bs_w_4, 101 bs_notimpl_bs_w_8, 102 103 /* write multiple */ 104 ifpga_bs_wm_1, 105 ifpga_bs_wm_2, 106 ifpga_bs_wm_4, 107 bs_notimpl_bs_wm_8, 108 109 /* write region */ 110 bs_notimpl_bs_wr_1, 111 ifpga_bs_wr_2, 112 ifpga_bs_wr_4, 113 bs_notimpl_bs_wr_8, 114 115 /* set multiple */ 116 bs_notimpl_bs_sm_1, 117 bs_notimpl_bs_sm_2, 118 bs_notimpl_bs_sm_4, 119 bs_notimpl_bs_sm_8, 120 121 /* set region */ 122 bs_notimpl_bs_sr_1, 123 ifpga_bs_sr_2, 124 bs_notimpl_bs_sr_4, 125 bs_notimpl_bs_sr_8, 126 127 /* copy */ 128 bs_notimpl_bs_c_1, 129 ifpga_bs_c_2, 130 bs_notimpl_bs_c_4, 131 bs_notimpl_bs_c_8, 132 }; 133 134 void ifpga_create_io_bs_tag(t, cookie) 135 struct bus_space *t; 136 void *cookie; 137 { 138 *t = ifpga_bs_tag; 139 t->bs_cookie = cookie; 140 } 141 142 void ifpga_create_mem_bs_tag(t, cookie) 143 struct bus_space *t; 144 void *cookie; 145 { 146 *t = ifpga_bs_tag; 147 t->bs_map = ifpga_mem_bs_map; 148 t->bs_unmap = ifpga_mem_bs_unmap; 149 t->bs_cookie = cookie; 150 } 151 152 /* bus space functions */ 153 154 int 155 ifpga_bs_map(t, bpa, size, cacheable, bshp) 156 void *t; 157 bus_addr_t bpa; 158 bus_size_t size; 159 int cacheable; 160 bus_space_handle_t *bshp; 161 { 162 /* The cookie is the base address for the I/O area */ 163 *bshp = bpa + (bus_addr_t)t; 164 return 0; 165 } 166 167 int 168 ifpga_mem_bs_map(t, bpa, size, cacheable, bshp) 169 void *t; 170 bus_addr_t bpa; 171 bus_size_t size; 172 int cacheable; 173 bus_space_handle_t *bshp; 174 { 175 bus_addr_t startpa, endpa; 176 vaddr_t va; 177 178 /* Round the allocation to page boundries */ 179 startpa = trunc_page(bpa); 180 endpa = round_page(bpa + size); 181 182 /* Get some VM. */ 183 va = uvm_km_valloc(kernel_map, endpa - startpa); 184 if (va == 0) 185 return ENOMEM; 186 187 /* Store the bus space handle */ 188 *bshp = va + (bpa & PGOFSET); 189 190 /* Now map the pages */ 191 /* The cookie is the physical base address for the I/O area */ 192 while (startpa < endpa) { 193 /* XXX pmap_kenter_pa maps pages cacheable -- not what 194 we want. */ 195 pmap_enter(pmap_kernel(), va, (bus_addr_t)t + startpa, 196 VM_PROT_READ | VM_PROT_WRITE, 0); 197 va += NBPG; 198 startpa += NBPG; 199 } 200 pmap_update(pmap_kernel()); 201 202 return 0; 203 } 204 205 int 206 ifpga_bs_alloc(t, rstart, rend, size, alignment, boundary, cacheable, 207 bpap, bshp) 208 void *t; 209 bus_addr_t rstart, rend; 210 bus_size_t size, alignment, boundary; 211 int cacheable; 212 bus_addr_t *bpap; 213 bus_space_handle_t *bshp; 214 { 215 panic("ifpga_alloc(): Help!\n"); 216 } 217 218 219 void 220 ifpga_bs_unmap(t, bsh, size) 221 void *t; 222 bus_space_handle_t bsh; 223 bus_size_t size; 224 { 225 /* Nothing to do for an io map. */ 226 } 227 228 void 229 ifpga_mem_bs_unmap(t, bsh, size) 230 void *t; 231 bus_space_handle_t bsh; 232 bus_size_t size; 233 { 234 vaddr_t startva, endva; 235 236 startva = trunc_page(bsh); 237 endva = round_page(bsh + size); 238 239 uvm_km_free(kernel_map, startva, endva - startva); 240 } 241 242 void 243 ifpga_bs_free(t, bsh, size) 244 void *t; 245 bus_space_handle_t bsh; 246 bus_size_t size; 247 { 248 249 panic("ifpga_free(): Help!\n"); 250 /* ifpga_bs_unmap() does all that we need to do. */ 251 /* ifpga_bs_unmap(t, bsh, size);*/ 252 } 253 254 int 255 ifpga_bs_subregion(t, bsh, offset, size, nbshp) 256 void *t; 257 bus_space_handle_t bsh; 258 bus_size_t offset, size; 259 bus_space_handle_t *nbshp; 260 { 261 262 *nbshp = bsh + (offset << ((int)t)); 263 return (0); 264 } 265 266 void * 267 ifpga_bs_vaddr(t, bsh) 268 void *t; 269 bus_space_handle_t bsh; 270 { 271 272 return ((void *)bsh); 273 } 274 275 void 276 ifpga_bs_barrier(t, bsh, offset, len, flags) 277 void *t; 278 bus_space_handle_t bsh; 279 bus_size_t offset, len; 280 int flags; 281 { 282 } 283
Indexes created Mon Oct 20 11:09:49 GMT 2025