1 /* $NetBSD: obio_space.c,v 1.10 2023/04/21 14:58:34 skrll Exp $ */ 2 3 /* 4 * Copyright (c) 2001, 2002, 2003 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/cdefs.h> 43 __KERNEL_RCSID(0, "$NetBSD: obio_space.c,v 1.10 2023/04/21 14:58:34 skrll Exp $"); 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 48 #include <uvm/uvm_extern.h> 49 50 #include <sys/bus.h> 51 52 /* Prototypes for all the bus_space structure functions */ 53 bs_protos(obio); 54 bs_protos(generic); 55 bs_protos(generic_armv4); 56 bs_protos(bs_notimpl); 57 58 /* 59 * The obio bus space tag. This is constant for all instances, so 60 * we never have to explicitly "create" it. 61 */ 62 struct bus_space obio_bs_tag = { 63 /* cookie */ 64 .bs_cookie = (void *) 0, 65 66 /* mapping/unmapping */ 67 .bs_map = obio_bs_map, 68 .bs_unmap = obio_bs_unmap, 69 .bs_subregion = obio_bs_subregion, 70 71 /* allocation/deallocation */ 72 .bs_alloc = obio_bs_alloc, 73 .bs_free = obio_bs_free, 74 75 /* get kernel virtual address */ 76 .bs_vaddr = obio_bs_vaddr, 77 78 /* mmap */ 79 .bs_mmap = bs_notimpl_bs_mmap, 80 81 /* barrier */ 82 .bs_barrier = obio_bs_barrier, 83 84 /* read (single) */ 85 .bs_r_1 = generic_bs_r_1, 86 .bs_r_2 = generic_armv4_bs_r_2, 87 .bs_r_4 = generic_bs_r_4, 88 .bs_r_8 = bs_notimpl_bs_r_8, 89 90 /* read multiple */ 91 .bs_rm_1 = generic_bs_rm_1, 92 .bs_rm_2 = bs_notimpl_bs_rm_2, 93 .bs_rm_4 = bs_notimpl_bs_rm_4, 94 .bs_rm_8 = bs_notimpl_bs_rm_8, 95 96 /* read region */ 97 .bs_rr_1 = generic_bs_rr_1, 98 .bs_rr_2 = bs_notimpl_bs_rr_2, 99 .bs_rr_4 = bs_notimpl_bs_rr_4, 100 .bs_rr_8 = bs_notimpl_bs_rr_8, 101 102 /* write (single) */ 103 .bs_w_1 = generic_bs_w_1, 104 .bs_w_2 = generic_armv4_bs_w_2, 105 .bs_w_4 = generic_bs_w_4, 106 .bs_w_8 = bs_notimpl_bs_w_8, 107 108 /* write multiple */ 109 .bs_wm_1 = generic_bs_wm_1, 110 .bs_wm_2 = bs_notimpl_bs_wm_2, 111 .bs_wm_4 = bs_notimpl_bs_wm_4, 112 .bs_wm_8 = bs_notimpl_bs_wm_8, 113 114 /* write region */ 115 .bs_wr_1 = bs_notimpl_bs_wr_1, 116 .bs_wr_2 = bs_notimpl_bs_wr_2, 117 .bs_wr_4 = bs_notimpl_bs_wr_4, 118 .bs_wr_8 = bs_notimpl_bs_wr_8, 119 120 /* set multiple */ 121 .bs_sm_1 = bs_notimpl_bs_sm_1, 122 .bs_sm_2 = bs_notimpl_bs_sm_2, 123 .bs_sm_4 = bs_notimpl_bs_sm_4, 124 .bs_sm_8 = bs_notimpl_bs_sm_8, 125 126 /* set region */ 127 .bs_sr_1 = bs_notimpl_bs_sr_1, 128 .bs_sr_2 = bs_notimpl_bs_sr_2, 129 .bs_sr_4 = bs_notimpl_bs_sr_4, 130 .bs_sr_8 = bs_notimpl_bs_sr_8, 131 132 /* copy */ 133 .bs_c_1 = bs_notimpl_bs_c_1, 134 .bs_c_2 = bs_notimpl_bs_c_2, 135 .bs_c_4 = bs_notimpl_bs_c_4, 136 .bs_c_8 = bs_notimpl_bs_c_8, 137 }; 138 139 int 140 obio_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flag, 141 bus_space_handle_t *bshp) 142 { 143 const struct pmap_devmap *pd; 144 paddr_t startpa, endpa, pa, offset; 145 vaddr_t va; 146 147 if ((pd = pmap_devmap_find_pa(bpa, size)) != NULL) { 148 /* Device was statically mapped. */ 149 *bshp = pd->pd_va + (bpa - pd->pd_pa); 150 return (0); 151 } 152 153 endpa = round_page(bpa + size); 154 offset = bpa & PAGE_MASK; 155 startpa = trunc_page(bpa); 156 157 va = uvm_km_alloc(kernel_map, endpa - startpa, 0, 158 UVM_KMF_VAONLY | UVM_KMF_NOWAIT); 159 if (va == 0) 160 return ENOMEM; 161 162 *bshp = va + offset; 163 164 const int pmapflags = 165 (flag & (BUS_SPACE_MAP_CACHEABLE|BUS_SPACE_MAP_PREFETCHABLE)) 166 ? 0 167 : PMAP_NOCACHE; 168 169 for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) { 170 pmap_kenter_pa(va, pa, VM_PROT_READ | VM_PROT_WRITE, pmapflags); 171 } 172 pmap_update(pmap_kernel()); 173 174 return (0); 175 } 176 177 int 178 obio_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend, bus_size_t size, 179 bus_size_t alignment, bus_size_t boundary, int flags, bus_addr_t *bpap, 180 bus_space_handle_t *bshp) 181 { 182 183 panic("obio_bs_alloc(): not implemented\n"); 184 } 185 186 187 void 188 obio_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size) 189 { 190 vaddr_t va, endva; 191 192 if (pmap_devmap_find_va(bsh, size) != NULL) { 193 /* Device was statically mapped; nothing to do. */ 194 return; 195 } 196 197 endva = round_page(bsh + size); 198 va = trunc_page(bsh); 199 200 pmap_kremove(va, endva - va); 201 uvm_km_free(kernel_map, va, endva - va, UVM_KMF_VAONLY); 202 } 203 204 void 205 obio_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size) 206 { 207 208 panic("obio_bs_free(): not implemented\n"); 209 } 210 211 int 212 obio_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset, 213 bus_size_t size, bus_space_handle_t *nbshp) 214 { 215 216 *nbshp = bsh + offset; 217 return (0); 218 } 219 220 void * 221 obio_bs_vaddr(void *t, bus_space_handle_t bsh) 222 { 223 224 return ((void *)bsh); 225 } 226 227 void 228 obio_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset, 229 bus_size_t len, int flags) 230 { 231 232 /* Nothing to do. */ 233 } 234
Indexes created Fri Sep 26 08:10:20 GMT 2025