obio_space.c revision 1.1
1 /* $NetBSD: obio_space.c,v 1.1 2003/01/25 02:00:17 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 2001, 2002 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Jason R. Thorpe for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 /* 39 * bus_space functions for ADI BRH on-board devices 40 */ 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 45 #include <uvm/uvm_extern.h> 46 47 #include <machine/bus.h> 48 49 #include <evbarm/adi_brh/brhreg.h> 50 51 /* Prototypes for all the bus_space structure functions */ 52 bs_protos(obio); 53 bs_protos(generic); 54 bs_protos(generic_armv4); 55 bs_protos(bs_notimpl); 56 57 /* 58 * The obio bus space tag. This is constant for all instances, so 59 * we never have to explicitly "create" it. 60 */ 61 struct bus_space obio_bs_tag = { 62 /* cookie */ 63 (void *) 0, 64 65 /* mapping/unmapping */ 66 obio_bs_map, 67 obio_bs_unmap, 68 obio_bs_subregion, 69 70 /* allocation/deallocation */ 71 obio_bs_alloc, 72 obio_bs_free, 73 74 /* get kernel virtual address */ 75 obio_bs_vaddr, 76 77 /* mmap */ 78 bs_notimpl_bs_mmap, 79 80 /* barrier */ 81 obio_bs_barrier, 82 83 /* read (single) */ 84 generic_bs_r_1, 85 generic_armv4_bs_r_2, 86 generic_bs_r_4, 87 bs_notimpl_bs_r_8, 88 89 /* read multiple */ 90 generic_bs_rm_1, 91 bs_notimpl_bs_rm_2, 92 bs_notimpl_bs_rm_4, 93 bs_notimpl_bs_rm_8, 94 95 /* read region */ 96 generic_bs_rr_1, 97 bs_notimpl_bs_rr_2, 98 bs_notimpl_bs_rr_4, 99 bs_notimpl_bs_rr_8, 100 101 /* write (single) */ 102 generic_bs_w_1, 103 generic_armv4_bs_w_2, 104 generic_bs_w_4, 105 bs_notimpl_bs_w_8, 106 107 /* write multiple */ 108 generic_bs_wm_1, 109 bs_notimpl_bs_wm_2, 110 bs_notimpl_bs_wm_4, 111 bs_notimpl_bs_wm_8, 112 113 /* write region */ 114 bs_notimpl_bs_wr_1, 115 bs_notimpl_bs_wr_2, 116 bs_notimpl_bs_wr_4, 117 bs_notimpl_bs_wr_8, 118 119 /* set multiple */ 120 bs_notimpl_bs_sm_1, 121 bs_notimpl_bs_sm_2, 122 bs_notimpl_bs_sm_4, 123 bs_notimpl_bs_sm_8, 124 125 /* set region */ 126 bs_notimpl_bs_sr_1, 127 bs_notimpl_bs_sr_2, 128 bs_notimpl_bs_sr_4, 129 bs_notimpl_bs_sr_8, 130 131 /* copy */ 132 bs_notimpl_bs_c_1, 133 bs_notimpl_bs_c_2, 134 bs_notimpl_bs_c_4, 135 bs_notimpl_bs_c_8, 136 }; 137 138 int 139 obio_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flags, 140 bus_space_handle_t *bshp) 141 { 142 uint32_t startpa, endpa, pa; 143 vaddr_t va; 144 pt_entry_t *pte; 145 146 /* 147 * Some devices have already been mapped during bootstrap. 148 */ 149 switch (bpa) { 150 case BRH_UART1_BASE: 151 *bshp = BRH_UART1_VBASE; 152 break; 153 154 case BRH_UART2_BASE: 155 *bshp = BRH_UART2_VBASE; 156 break; 157 158 default: 159 /* XXX -- add code to check for valid request */ 160 startpa = trunc_page(bpa); 161 endpa = round_page(bpa + size); 162 163 /* XXX use some extent to check for duplicate mappings? */ 164 165 va = uvm_km_valloc(kernel_map, endpa - startpa); 166 if (! va) 167 return ENOMEM; 168 169 *bshp = (bus_space_handle_t) (va + (bpa - startpa)); 170 171 for (pa=startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) { 172 pmap_kenter_pa(va, pa, VM_PROT_READ | VM_PROT_WRITE); 173 pte = vtopte(va); 174 *pte &= ~L2_S_CACHE_MASK; 175 PTE_SYNC(pte); 176 } 177 pmap_update(pmap_kernel()); 178 break; 179 } 180 181 return (0); 182 } 183 184 int 185 obio_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend, bus_size_t size, 186 bus_size_t alignment, bus_size_t boundary, int flags, bus_addr_t *bpap, 187 bus_space_handle_t *bshp) 188 { 189 190 panic("obio_bs_alloc(): not implemented\n"); 191 } 192 193 194 void 195 obio_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size) 196 { 197 198 switch (bsh) { 199 case BRH_UART1_VBASE: 200 case BRH_UART2_VBASE: 201 /* Nothing to do. */ 202 203 default: 204 /* Handle other cases, like flash? */ 205 panic("obio_bs_unmap: impossible"); 206 } 207 } 208 209 void 210 obio_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size) 211 { 212 213 panic("obio_bs_free(): not implemented\n"); 214 } 215 216 int 217 obio_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset, 218 bus_size_t size, bus_space_handle_t *nbshp) 219 { 220 221 *nbshp = bsh + offset; 222 return (0); 223 } 224 225 void * 226 obio_bs_vaddr(void *t, bus_space_handle_t bsh) 227 { 228 229 return ((void *)bsh); 230 } 231 232 void 233 obio_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset, 234 bus_size_t len, int flags) 235 { 236 237 /* Nothing to do. */ 238 } 239
Indexes created Tue Sep 30 07:10:03 GMT 2025