bcmgen_space.c revision 1.4
1 /* $NetBSD: bcmgen_space.c,v 1.4 2013/10/28 22:51:16 matt Exp $ */ 2 3 /*- 4 * Copyright (c) 2012 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Nick Hudson 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 33 #include <sys/cdefs.h> 34 __KERNEL_RCSID(0, "$NetBSD: bcmgen_space.c,v 1.4 2013/10/28 22:51:16 matt Exp $"); 35 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 39 #include <uvm/uvm_extern.h> 40 41 #include <sys/bus.h> 42 #include <sys/endian.h> 43 44 /* Prototypes for all the bus_space structure functions */ 45 bs_protos(bcmgen); 46 bs_protos(generic); 47 bs_protos(generic_armv4); 48 bs_protos(bs_notimpl); 49 50 #if BYTE_ORDER == BIG_ENDIAN 51 #define NSWAP(n) n ## _swap 52 #else 53 #define NSWAP(n) n 54 #endif 55 56 struct bus_space bcmgen_bs_tag = { 57 /* cookie */ 58 (void *) 0, 59 60 /* mapping/unmapping */ 61 bcmgen_bs_map, 62 bcmgen_bs_unmap, 63 bcmgen_bs_subregion, 64 65 /* allocation/deallocation */ 66 bcmgen_bs_alloc, /* not implemented */ 67 bcmgen_bs_free, /* not implemented */ 68 69 /* get kernel virtual address */ 70 bcmgen_bs_vaddr, 71 72 /* mmap */ 73 bs_notimpl_bs_mmap, 74 75 /* barrier */ 76 bcmgen_bs_barrier, 77 78 /* read (single) */ 79 generic_bs_r_1, 80 NSWAP(generic_armv4_bs_r_2), 81 NSWAP(generic_bs_r_4), 82 bs_notimpl_bs_r_8, 83 84 /* read multiple */ 85 generic_bs_rm_1, 86 NSWAP(generic_armv4_bs_rm_2), 87 NSWAP(generic_bs_rm_4), 88 bs_notimpl_bs_rm_8, 89 90 /* read region */ 91 generic_bs_rr_1, 92 NSWAP(generic_armv4_bs_rr_2), 93 NSWAP(generic_bs_rr_4), 94 bs_notimpl_bs_rr_8, 95 96 /* write (single) */ 97 generic_bs_w_1, 98 NSWAP(generic_armv4_bs_w_2), 99 NSWAP(generic_bs_w_4), 100 bs_notimpl_bs_w_8, 101 102 /* write multiple */ 103 generic_bs_wm_1, 104 NSWAP(generic_armv4_bs_wm_2), 105 NSWAP(generic_bs_wm_4), 106 bs_notimpl_bs_wm_8, 107 108 /* write region */ 109 generic_bs_wr_1, 110 NSWAP(generic_armv4_bs_wr_2), 111 NSWAP(generic_bs_wr_4), 112 bs_notimpl_bs_wr_8, 113 114 /* set multiple */ 115 bs_notimpl_bs_sm_1, 116 bs_notimpl_bs_sm_2, 117 bs_notimpl_bs_sm_4, 118 bs_notimpl_bs_sm_8, 119 120 /* set region */ 121 generic_bs_sr_1, 122 NSWAP(generic_armv4_bs_sr_2), 123 bs_notimpl_bs_sr_4, 124 bs_notimpl_bs_sr_8, 125 126 /* copy */ 127 bs_notimpl_bs_c_1, 128 generic_armv4_bs_c_2, 129 bs_notimpl_bs_c_4, 130 bs_notimpl_bs_c_8, 131 132 #ifdef __BUS_SPACE_HAS_STREAM_METHODS 133 /* read (single) */ 134 generic_bs_r_1, 135 NSWAP(generic_armv4_bs_r_2), 136 NSWAP(generic_bs_r_4), 137 bs_notimpl_bs_r_8, 138 139 /* read multiple */ 140 generic_bs_rm_1, 141 NSWAP(generic_armv4_bs_rm_2), 142 NSWAP(generic_bs_rm_4), 143 bs_notimpl_bs_rm_8, 144 145 /* read region */ 146 generic_bs_rr_1, 147 NSWAP(generic_armv4_bs_rr_2), 148 NSWAP(generic_bs_rr_4), 149 bs_notimpl_bs_rr_8, 150 151 /* write (single) */ 152 generic_bs_w_1, 153 NSWAP(generic_armv4_bs_w_2), 154 NSWAP(generic_bs_w_4), 155 bs_notimpl_bs_w_8, 156 157 /* write multiple */ 158 generic_bs_wm_1, 159 NSWAP(generic_armv4_bs_wm_2), 160 NSWAP(generic_bs_wm_4), 161 bs_notimpl_bs_wm_8, 162 163 /* write region */ 164 generic_bs_wr_1, 165 NSWAP(generic_armv4_bs_wr_2), 166 NSWAP(generic_bs_wr_4), 167 bs_notimpl_bs_wr_8, 168 #endif 169 }; 170 171 int 172 bcmgen_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flag, 173 bus_space_handle_t *bshp) 174 { 175 u_long startpa, endpa, pa; 176 const struct pmap_devmap *pd; 177 vaddr_t va; 178 179 if ((pd = pmap_devmap_find_pa(bpa, size)) != NULL) { 180 /* Device was statically mapped. */ 181 *bshp = pd->pd_va + (bpa - pd->pd_pa); 182 return 0; 183 } 184 185 startpa = trunc_page(bpa); 186 endpa = round_page(bpa + size); 187 188 /* XXX use extent manager to check duplicate mapping */ 189 190 va = uvm_km_alloc(kernel_map, endpa - startpa, 0, 191 UVM_KMF_VAONLY | UVM_KMF_NOWAIT | UVM_KMF_COLORMATCH); 192 if (!va) 193 return ENOMEM; 194 195 *bshp = (bus_space_handle_t)(va + (bpa - startpa)); 196 197 const int pmapflags = 198 (flag & (BUS_SPACE_MAP_CACHEABLE|BUS_SPACE_MAP_PREFETCHABLE)) 199 ? 0 200 : PMAP_NOCACHE; 201 for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) { 202 pmap_kenter_pa(va, pa, VM_PROT_READ | VM_PROT_WRITE, pmapflags); 203 } 204 pmap_update(pmap_kernel()); 205 206 return 0; 207 } 208 209 void 210 bcmgen_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size) 211 { 212 vaddr_t va; 213 vsize_t sz; 214 215 if (pmap_devmap_find_va(bsh, size) != NULL) { 216 /* Device was statically mapped; nothing to do. */ 217 return; 218 } 219 220 va = trunc_page(bsh); 221 sz = round_page(bsh + size) - va; 222 223 pmap_kremove(va, sz); 224 pmap_update(pmap_kernel()); 225 uvm_km_free(kernel_map, va, sz, UVM_KMF_VAONLY); 226 } 227 228 229 int 230 bcmgen_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset, 231 bus_size_t size, bus_space_handle_t *nbshp) 232 { 233 234 *nbshp = bsh + offset; 235 return (0); 236 } 237 238 void 239 bcmgen_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset, 240 bus_size_t len, int flags) 241 { 242 flags &= BUS_SPACE_BARRIER_READ|BUS_SPACE_BARRIER_WRITE; 243 244 if (flags) { 245 /* Issue an ARM11 Data Syncronisation Barrier (DSB) */ 246 #ifdef _ARM_ARCH_7 247 __asm __volatile("dsb"); 248 #else 249 __asm__ __volatile__ ("mcr p15, 0, %0, c7, c10, 4" : : "r" (0) 250 : "memory"); 251 #endif 252 return; 253 } 254 255 } 256 257 void * 258 bcmgen_bs_vaddr(void *t, bus_space_handle_t bsh) 259 { 260 261 return (void *)bsh; 262 } 263 264 paddr_t 265 bcmgen_bs_mmap(void *t, bus_addr_t bpa, off_t offset, int prot, int flags) 266 { 267 paddr_t bus_flags = 0; 268 269 if (flags & BUS_SPACE_MAP_PREFETCHABLE) 270 bus_flags |= ARM32_MMAP_WRITECOMBINE; 271 272 return (arm_btop(bpa + offset) | bus_flags); 273 } 274 275 int 276 bcmgen_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend, 277 bus_size_t size, bus_size_t alignment, bus_size_t boundary, int flags, 278 bus_addr_t *bpap, bus_space_handle_t *bshp) 279 { 280 281 panic("%s(): not implemented\n", __func__); 282 } 283 284 void 285 bcmgen_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size) 286 { 287 288 panic("%s(): not implemented\n", __func__); 289 } 290
Indexes created Tue Sep 30 20:09:53 GMT 2025