1 /* $NetBSD: ixp12x0_io.c,v 1.12 2009/03/14 21:04:05 dsl Exp $ */ 2 3 /* 4 * Copyright (c) 2002, 2003 5 * Ichiro FUKUHARA <ichiro@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 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Ichiro FUKUHARA. 19 * 4. The name of the company nor the name of the author may be used to 20 * endorse or promote products derived from this software without specific 21 * prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR 27 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: ixp12x0_io.c,v 1.12 2009/03/14 21:04:05 dsl Exp $"); 38 39 /* 40 * bus_space I/O functions for ixp12x0 41 */ 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/queue.h> 46 47 #include <uvm/uvm.h> 48 49 #include <machine/bus.h> 50 51 #include <arm/ixp12x0/ixp12x0reg.h> 52 #include <arm/ixp12x0/ixp12x0var.h> 53 54 /* Proto types for all the bus_space structure functions */ 55 bs_protos(ixp12x0); 56 bs_protos(generic); 57 bs_protos(generic_armv4); 58 bs_protos(bs_notimpl); 59 60 struct bus_space ixp12x0_bs_tag = { 61 /* cookie */ 62 (void *) 0, 63 64 /* mapping/unmapping */ 65 ixp12x0_bs_map, 66 ixp12x0_bs_unmap, 67 ixp12x0_bs_subregion, 68 69 /* allocation/deallocation */ 70 ixp12x0_bs_alloc, 71 ixp12x0_bs_free, 72 73 /* get kernel virtual address */ 74 ixp12x0_bs_vaddr, 75 76 /* mmap bus space for userland */ 77 bs_notimpl_bs_mmap, 78 79 /* barrier */ 80 ixp12x0_bs_barrier, 81 82 /* read (single) */ 83 generic_bs_r_1, 84 generic_armv4_bs_r_2, 85 generic_bs_r_4, 86 bs_notimpl_bs_r_8, 87 88 /* read multiple */ 89 generic_bs_rm_1, 90 generic_armv4_bs_rm_2, 91 generic_bs_rm_4, 92 bs_notimpl_bs_rm_8, 93 94 /* read region */ 95 generic_bs_rr_1, 96 generic_armv4_bs_rr_2, 97 generic_bs_rr_4, 98 bs_notimpl_bs_rr_8, 99 100 /* write (single) */ 101 generic_bs_w_1, 102 generic_armv4_bs_w_2, 103 generic_bs_w_4, 104 bs_notimpl_bs_w_8, 105 106 /* write multiple */ 107 generic_bs_wm_1, 108 generic_armv4_bs_wm_2, 109 generic_bs_wm_4, 110 bs_notimpl_bs_wm_8, 111 112 /* write region */ 113 generic_bs_wr_1, 114 generic_armv4_bs_wr_2, 115 generic_bs_wr_4, 116 bs_notimpl_bs_wr_8, 117 118 /* set multiple */ 119 bs_notimpl_bs_sm_1, 120 bs_notimpl_bs_sm_2, 121 bs_notimpl_bs_sm_4, 122 bs_notimpl_bs_sm_8, 123 124 /* set region */ 125 bs_notimpl_bs_sr_1, 126 generic_armv4_bs_sr_2, 127 generic_bs_sr_4, 128 bs_notimpl_bs_sr_8, 129 130 /* copy */ 131 bs_notimpl_bs_c_1, 132 generic_armv4_bs_c_2, 133 bs_notimpl_bs_c_4, 134 bs_notimpl_bs_c_8, 135 }; 136 137 /* Common routines */ 138 139 int 140 ixp12x0_bs_map(void *t, bus_addr_t bpa, bus_size_t size, 141 int flags, bus_space_handle_t *bshp) 142 { 143 const struct pmap_devmap *pd; 144 145 paddr_t startpa; 146 paddr_t endpa; 147 paddr_t pa; 148 paddr_t offset; 149 vaddr_t va; 150 pt_entry_t *pte; 151 152 if ((pd = pmap_devmap_find_pa(bpa, size)) != NULL) { 153 /* Device was statically mapped. */ 154 *bshp = pd->pd_va + (bpa - pd->pd_pa); 155 return 0; 156 } 157 158 endpa = round_page(bpa + size); 159 offset = bpa & PAGE_MASK; 160 startpa = trunc_page(bpa); 161 162 va = uvm_km_alloc(kernel_map, endpa - startpa, 0, 163 UVM_KMF_VAONLY | UVM_KMF_NOWAIT); 164 if (va == 0) 165 return ENOMEM; 166 167 *bshp = va + offset; 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); 171 pte = vtopte(va); 172 *pte &= ~L2_S_CACHE_MASK; 173 PTE_SYNC(pte); 174 } 175 pmap_update(pmap_kernel()); 176 177 return 0; 178 } 179 180 void 181 ixp12x0_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size) 182 { 183 vaddr_t va; 184 vaddr_t endva; 185 186 if (pmap_devmap_find_va(bsh, size) != NULL) { 187 /* Device was statically mapped; nothing to do. */ 188 return; 189 } 190 191 endva = round_page(bsh + size); 192 va = trunc_page(bsh); 193 194 pmap_kremove(va, endva - va); 195 uvm_km_free(kernel_map, va, endva - va, UVM_KMF_VAONLY); 196 } 197 198 int 199 ixp12x0_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset, bus_size_t size, bus_space_handle_t *nbshp) 200 { 201 202 *nbshp = bsh + offset; 203 return (0); 204 } 205 206 void * 207 ixp12x0_bs_vaddr(void *t, bus_space_handle_t bsh) 208 { 209 return ((void *)bsh); 210 } 211 212 int 213 ixp12x0_bs_alloc(void *t, 214 bus_addr_t rstart, bus_addr_t rend, bus_size_t size, 215 bus_size_t alignment, bus_size_t boundary, 216 int flags, bus_addr_t *bpap, 217 bus_space_handle_t *bshp) 218 { 219 panic("ixp12x0_bs_alloc(): not implemented\n"); 220 } 221 222 void 223 ixp12x0_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size) 224 { 225 panic("ixp12x0_bs_free(): not implemented\n"); 226 } 227 228 void 229 ixp12x0_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset, bus_size_t len, int flags) 230 { 231 /* NULL */ 232 } 233 234 /* End of ixp12x0_io.c */ 235