1 /* $NetBSD: obio_space.c,v 1.2 2009/11/07 07:27:42 cegger 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 IQ80321 on-board devices 40 */ 41 42 #include <sys/cdefs.h> 43 __KERNEL_RCSID(0, "$NetBSD: obio_space.c,v 1.2 2009/11/07 07:27:42 cegger Exp $"); 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 48 #include <uvm/uvm_extern.h> 49 50 #include <machine/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 (void *) 0, 65 66 /* mapping/unmapping */ 67 obio_bs_map, 68 obio_bs_unmap, 69 obio_bs_subregion, 70 71 /* allocation/deallocation */ 72 obio_bs_alloc, 73 obio_bs_free, 74 75 /* get kernel virtual address */ 76 obio_bs_vaddr, 77 78 /* mmap */ 79 bs_notimpl_bs_mmap, 80 81 /* barrier */ 82 obio_bs_barrier, 83 84 /* read (single) */ 85 generic_bs_r_1, 86 generic_armv4_bs_r_2, 87 generic_bs_r_4, 88 bs_notimpl_bs_r_8, 89 90 /* read multiple */ 91 generic_bs_rm_1, 92 generic_armv4_bs_rm_2, 93 bs_notimpl_bs_rm_4, 94 bs_notimpl_bs_rm_8, 95 96 /* read region */ 97 generic_bs_rr_1, 98 bs_notimpl_bs_rr_2, 99 bs_notimpl_bs_rr_4, 100 bs_notimpl_bs_rr_8, 101 102 /* write (single) */ 103 generic_bs_w_1, 104 generic_armv4_bs_w_2, 105 generic_bs_w_4, 106 bs_notimpl_bs_w_8, 107 108 /* write multiple */ 109 generic_bs_wm_1, 110 generic_armv4_bs_wm_2, 111 bs_notimpl_bs_wm_4, 112 bs_notimpl_bs_wm_8, 113 114 /* write region */ 115 bs_notimpl_bs_wr_1, 116 bs_notimpl_bs_wr_2, 117 bs_notimpl_bs_wr_4, 118 bs_notimpl_bs_wr_8, 119 120 /* set multiple */ 121 bs_notimpl_bs_sm_1, 122 bs_notimpl_bs_sm_2, 123 bs_notimpl_bs_sm_4, 124 bs_notimpl_bs_sm_8, 125 126 /* set region */ 127 bs_notimpl_bs_sr_1, 128 bs_notimpl_bs_sr_2, 129 bs_notimpl_bs_sr_4, 130 bs_notimpl_bs_sr_8, 131 132 /* copy */ 133 bs_notimpl_bs_c_1, 134 bs_notimpl_bs_c_2, 135 bs_notimpl_bs_c_4, 136 bs_notimpl_bs_c_8, 137 }; 138 139 int 140 obio_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flags, 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 pt_entry_t *pte; 147 148 if ((pd = pmap_devmap_find_pa(bpa, size)) != NULL) { 149 /* Device was statically mapped. */ 150 *bshp = pd->pd_va + (bpa - pd->pd_pa); 151 return 0; 152 } 153 154 endpa = round_page(bpa + size); 155 offset = bpa & PAGE_MASK; 156 startpa = trunc_page(bpa); 157 158 va = uvm_km_alloc(kernel_map, endpa - startpa, 0, 159 UVM_KMF_VAONLY | UVM_KMF_NOWAIT); 160 if (va == 0) 161 return ENOMEM; 162 163 *bshp = va + offset; 164 165 for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) { 166 pmap_kenter_pa(va, pa, VM_PROT_READ | VM_PROT_WRITE, 0); 167 pte = vtopte(va); 168 *pte &= ~L2_S_CACHE_MASK; 169 PTE_SYNC(pte); 170 } 171 pmap_update(pmap_kernel()); 172 173 return 0; 174 } 175 176 int 177 obio_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend, bus_size_t size, 178 bus_size_t alignment, bus_size_t boundary, int flags, bus_addr_t *bpap, 179 bus_space_handle_t *bshp) 180 { 181 182 panic("obio_bs_alloc(): not implemented"); 183 } 184 185 186 void 187 obio_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size) 188 { 189 vaddr_t va, endva; 190 191 if (pmap_devmap_find_va(bsh, size) != NULL) { 192 /* Device was statically mapped; nothing to do. */ 193 return; 194 } 195 196 endva = round_page(bsh + size); 197 va = trunc_page(bsh); 198 199 pmap_kremove(va, endva - va); 200 uvm_km_free(kernel_map, va, endva - va, UVM_KMF_VAONLY); 201 } 202 203 void 204 obio_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size) 205 { 206 207 panic("obio_bs_free(): not implemented"); 208 } 209 210 int 211 obio_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset, 212 bus_size_t size, bus_space_handle_t *nbshp) 213 { 214 215 *nbshp = bsh + offset; 216 return 0; 217 } 218 219 void * 220 obio_bs_vaddr(void *t, bus_space_handle_t bsh) 221 { 222 223 return (void *)bsh; 224 } 225 226 void 227 obio_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset, 228 bus_size_t len, int flags) 229 { 230 231 /* Nothing to do. */ 232 } 233