1 /* $NetBSD: ixp12x0_io.c,v 1.19 2023/04/21 15:00:48 skrll Exp $ */ 2 3 /* 4 * Copyright (c) 2002, 2003 5 * Ichiro FUKUHARA <ichiro (at) ichiro.org>. 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 * 17 * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR 21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __KERNEL_RCSID(0, "$NetBSD: ixp12x0_io.c,v 1.19 2023/04/21 15:00:48 skrll Exp $"); 32 33 /* 34 * bus_space I/O functions for ixp12x0 35 */ 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/queue.h> 40 41 #include <uvm/uvm.h> 42 43 #include <sys/bus.h> 44 45 #include <arm/ixp12x0/ixp12x0reg.h> 46 #include <arm/ixp12x0/ixp12x0var.h> 47 48 /* Proto types for all the bus_space structure functions */ 49 bs_protos(ixp12x0); 50 bs_protos(generic); 51 bs_protos(generic_armv4); 52 bs_protos(bs_notimpl); 53 54 struct bus_space ixp12x0_bs_tag = { 55 /* cookie */ 56 .bs_cookie = (void *) 0, 57 58 /* mapping/unmapping */ 59 .bs_map = ixp12x0_bs_map, 60 .bs_unmap = ixp12x0_bs_unmap, 61 .bs_subregion = ixp12x0_bs_subregion, 62 63 /* allocation/deallocation */ 64 .bs_alloc = ixp12x0_bs_alloc, 65 .bs_free = ixp12x0_bs_free, 66 67 /* get kernel virtual address */ 68 .bs_vaddr = ixp12x0_bs_vaddr, 69 70 /* mmap bus space for userland */ 71 .bs_mmap = bs_notimpl_bs_mmap, 72 73 /* barrier */ 74 .bs_barrier = ixp12x0_bs_barrier, 75 76 /* read (single) */ 77 .bs_r_1 = generic_bs_r_1, 78 .bs_r_2 = generic_armv4_bs_r_2, 79 .bs_r_4 = generic_bs_r_4, 80 .bs_r_8 = bs_notimpl_bs_r_8, 81 82 /* read multiple */ 83 .bs_rm_1 = generic_bs_rm_1, 84 .bs_rm_2 = generic_armv4_bs_rm_2, 85 .bs_rm_4 = generic_bs_rm_4, 86 .bs_rm_8 = bs_notimpl_bs_rm_8, 87 88 /* read region */ 89 .bs_rr_1 = generic_bs_rr_1, 90 .bs_rr_2 = generic_armv4_bs_rr_2, 91 .bs_rr_4 = generic_bs_rr_4, 92 .bs_rr_8 = bs_notimpl_bs_rr_8, 93 94 /* write (single) */ 95 .bs_w_1 = generic_bs_w_1, 96 .bs_w_2 = generic_armv4_bs_w_2, 97 .bs_w_4 = generic_bs_w_4, 98 .bs_w_8 = bs_notimpl_bs_w_8, 99 100 /* write multiple */ 101 .bs_wm_1 = generic_bs_wm_1, 102 .bs_wm_2 = generic_armv4_bs_wm_2, 103 .bs_wm_4 = generic_bs_wm_4, 104 .bs_wm_8 = bs_notimpl_bs_wm_8, 105 106 /* write region */ 107 .bs_wr_1 = generic_bs_wr_1, 108 .bs_wr_2 = generic_armv4_bs_wr_2, 109 .bs_wr_4 = generic_bs_wr_4, 110 .bs_wr_8 = bs_notimpl_bs_wr_8, 111 112 /* set multiple */ 113 .bs_sm_1 = bs_notimpl_bs_sm_1, 114 .bs_sm_2 = bs_notimpl_bs_sm_2, 115 .bs_sm_4 = bs_notimpl_bs_sm_4, 116 .bs_sm_8 = bs_notimpl_bs_sm_8, 117 118 /* set region */ 119 .bs_sr_1 = bs_notimpl_bs_sr_1, 120 .bs_sr_2 = generic_armv4_bs_sr_2, 121 .bs_sr_4 = generic_bs_sr_4, 122 .bs_sr_8 = bs_notimpl_bs_sr_8, 123 124 /* copy */ 125 .bs_c_1 = bs_notimpl_bs_c_1, 126 .bs_c_2 = generic_armv4_bs_c_2, 127 .bs_c_4 = bs_notimpl_bs_c_4, 128 .bs_c_8 = bs_notimpl_bs_c_8, 129 }; 130 131 /* Common routines */ 132 133 int 134 ixp12x0_bs_map(void *t, bus_addr_t bpa, bus_size_t size, 135 int flags, bus_space_handle_t *bshp) 136 { 137 const struct pmap_devmap *pd; 138 139 paddr_t startpa; 140 paddr_t endpa; 141 paddr_t pa; 142 paddr_t offset; 143 vaddr_t va; 144 145 if ((pd = pmap_devmap_find_pa(bpa, size)) != NULL) { 146 /* Device was statically mapped. */ 147 *bshp = pd->pd_va + (bpa - pd->pd_pa); 148 return 0; 149 } 150 151 endpa = round_page(bpa + size); 152 offset = bpa & PAGE_MASK; 153 startpa = trunc_page(bpa); 154 155 va = uvm_km_alloc(kernel_map, endpa - startpa, 0, 156 UVM_KMF_VAONLY | UVM_KMF_NOWAIT); 157 if (va == 0) 158 return ENOMEM; 159 160 *bshp = va + offset; 161 162 const int pmapflags = 163 (flags & (BUS_SPACE_MAP_CACHEABLE|BUS_SPACE_MAP_PREFETCHABLE)) 164 ? 0 165 : PMAP_NOCACHE; 166 for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) { 167 pmap_kenter_pa(va, pa, VM_PROT_READ | VM_PROT_WRITE, pmapflags); 168 } 169 pmap_update(pmap_kernel()); 170 171 return 0; 172 } 173 174 void 175 ixp12x0_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size) 176 { 177 vaddr_t va; 178 vaddr_t endva; 179 180 if (pmap_devmap_find_va(bsh, size) != NULL) { 181 /* Device was statically mapped; nothing to do. */ 182 return; 183 } 184 185 endva = round_page(bsh + size); 186 va = trunc_page(bsh); 187 188 pmap_kremove(va, endva - va); 189 uvm_km_free(kernel_map, va, endva - va, UVM_KMF_VAONLY); 190 } 191 192 int 193 ixp12x0_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset, bus_size_t size, bus_space_handle_t *nbshp) 194 { 195 196 *nbshp = bsh + offset; 197 return (0); 198 } 199 200 void * 201 ixp12x0_bs_vaddr(void *t, bus_space_handle_t bsh) 202 { 203 return ((void *)bsh); 204 } 205 206 int 207 ixp12x0_bs_alloc(void *t, 208 bus_addr_t rstart, bus_addr_t rend, bus_size_t size, 209 bus_size_t alignment, bus_size_t boundary, 210 int flags, bus_addr_t *bpap, 211 bus_space_handle_t *bshp) 212 { 213 panic("ixp12x0_bs_alloc(): not implemented\n"); 214 } 215 216 void 217 ixp12x0_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size) 218 { 219 panic("ixp12x0_bs_free(): not implemented\n"); 220 } 221 222 void 223 ixp12x0_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset, bus_size_t len, int flags) 224 { 225 /* NULL */ 226 } 227 228 /* End of ixp12x0_io.c */ 229
Indexes created Sat Sep 20 22:09:52 GMT 2025