1 /* $NetBSD: obio_space.c,v 1.17 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 IQ80310 on-board devices 40 */ 41 42 #include <sys/cdefs.h> 43 __KERNEL_RCSID(0, "$NetBSD: obio_space.c,v 1.17 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(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 .bs_cookie = (void *) 0, 64 65 /* mapping/unmapping */ 66 .bs_map = obio_bs_map, 67 .bs_unmap = obio_bs_unmap, 68 .bs_subregion = obio_bs_subregion, 69 70 /* allocation/deallocation */ 71 .bs_alloc = obio_bs_alloc, 72 .bs_free = obio_bs_free, 73 74 /* get kernel virtual address */ 75 .bs_vaddr = obio_bs_vaddr, 76 77 /* mmap */ 78 .bs_mmap = bs_notimpl_bs_mmap, 79 80 /* barrier */ 81 .bs_barrier = obio_bs_barrier, 82 83 /* read (single) */ 84 .bs_r_1 = generic_bs_r_1, 85 .bs_r_2 = bs_notimpl_bs_r_2, 86 .bs_r_4 = generic_bs_r_4, 87 .bs_r_8 = bs_notimpl_bs_r_8, 88 89 /* read multiple */ 90 .bs_rm_1 = generic_bs_rm_1, 91 .bs_rm_2 = bs_notimpl_bs_rm_2, 92 .bs_rm_4 = bs_notimpl_bs_rm_4, 93 .bs_rm_8 = bs_notimpl_bs_rm_8, 94 95 /* read region */ 96 .bs_rr_1 = generic_bs_rr_1, 97 .bs_rr_2 = bs_notimpl_bs_rr_2, 98 .bs_rr_4 = bs_notimpl_bs_rr_4, 99 .bs_rr_8 = bs_notimpl_bs_rr_8, 100 101 /* write (single) */ 102 .bs_w_1 = generic_bs_w_1, 103 .bs_w_2 = bs_notimpl_bs_w_2, 104 .bs_w_4 = generic_bs_w_4, 105 .bs_w_8 = bs_notimpl_bs_w_8, 106 107 /* write multiple */ 108 .bs_wm_1 = generic_bs_wm_1, 109 .bs_wm_2 = bs_notimpl_bs_wm_2, 110 .bs_wm_4 = bs_notimpl_bs_wm_4, 111 .bs_wm_8 = bs_notimpl_bs_wm_8, 112 113 /* write region */ 114 .bs_wr_1 = bs_notimpl_bs_wr_1, 115 .bs_wr_2 = bs_notimpl_bs_wr_2, 116 .bs_wr_4 = bs_notimpl_bs_wr_4, 117 .bs_wr_8 = bs_notimpl_bs_wr_8, 118 119 /* set multiple */ 120 .bs_sm_1 = bs_notimpl_bs_sm_1, 121 .bs_sm_2 = bs_notimpl_bs_sm_2, 122 .bs_sm_4 = bs_notimpl_bs_sm_4, 123 .bs_sm_8 = bs_notimpl_bs_sm_8, 124 125 /* set region */ 126 .bs_sr_1 = bs_notimpl_bs_sr_1, 127 .bs_sr_2 = bs_notimpl_bs_sr_2, 128 .bs_sr_4 = bs_notimpl_bs_sr_4, 129 .bs_sr_8 = bs_notimpl_bs_sr_8, 130 131 /* copy */ 132 .bs_c_1 = bs_notimpl_bs_c_1, 133 .bs_c_2 = bs_notimpl_bs_c_2, 134 .bs_c_4 = bs_notimpl_bs_c_4, 135 .bs_c_8 = bs_notimpl_bs_c_8, 136 }; 137 138 int 139 obio_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flag, 140 bus_space_handle_t *bshp) 141 { 142 const struct pmap_devmap *pd; 143 paddr_t startpa, endpa, pa, offset; 144 vaddr_t va; 145 146 if ((pd = pmap_devmap_find_pa(bpa, size)) != NULL) { 147 /* Device was statically mapped. */ 148 *bshp = pd->pd_va + (bpa - pd->pd_pa); 149 return (0); 150 } 151 152 endpa = round_page(bpa + size); 153 offset = bpa & PAGE_MASK; 154 startpa = trunc_page(bpa); 155 156 va = uvm_km_alloc(kernel_map, endpa - startpa, 0, 157 UVM_KMF_VAONLY | UVM_KMF_NOWAIT); 158 if (va == 0) 159 return(ENOMEM); 160 161 *bshp = va + offset; 162 163 const int pmapflags = 164 (flag & (BUS_SPACE_MAP_CACHEABLE|BUS_SPACE_MAP_PREFETCHABLE)) 165 ? 0 166 : PMAP_NOCACHE; 167 for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) { 168 pmap_kenter_pa(va, pa, VM_PROT_READ | VM_PROT_WRITE, pmapflags); 169 } 170 pmap_update(pmap_kernel()); 171 172 return (0); 173 } 174 175 int 176 obio_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend, bus_size_t size, 177 bus_size_t alignment, bus_size_t boundary, int flags, bus_addr_t *bpap, 178 bus_space_handle_t *bshp) 179 { 180 181 panic("obio_bs_alloc(): not implemented"); 182 } 183 184 185 void 186 obio_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size) 187 { 188 vaddr_t va, endva; 189 190 if (pmap_devmap_find_va(bsh, size) != NULL) { 191 /* Device was statically mapped; nothing to do. */ 192 return; 193 } 194 195 endva = round_page(bsh + size); 196 va = trunc_page(bsh); 197 198 pmap_kremove(va, endva - va); 199 uvm_km_free(kernel_map, va, endva - va, UVM_KMF_VAONLY); 200 } 201 202 void 203 obio_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size) 204 { 205 206 panic("obio_bs_free(): not implemented"); 207 } 208 209 int 210 obio_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset, 211 bus_size_t size, bus_space_handle_t *nbshp) 212 { 213 214 *nbshp = bsh + offset; 215 return (0); 216 } 217 218 void * 219 obio_bs_vaddr(void *t, bus_space_handle_t bsh) 220 { 221 222 return ((void *)bsh); 223 } 224 225 void 226 obio_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset, 227 bus_size_t len, int flags) 228 { 229 230 /* Nothing to do. */ 231 } 232
Indexes created Sun Oct 25 00:26:45 UTC 2026