1 /* $NetBSD: sa11x0_io.c,v 1.19 2011/07/01 20:31:39 dyoung Exp $ */ 2 3 /* 4 * Copyright (c) 1997 Mark Brinicombe. 5 * Copyright (c) 1997 Causality Limited. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Ichiro FUKUHARA. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by Mark Brinicombe. 22 * 4. The name of the company nor the name of the author may be used to 23 * endorse or promote products derived from this software without specific 24 * prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 27 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 28 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 29 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 30 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 31 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 32 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39 /* 40 * bus_space I/O functions for sa11x0 41 */ 42 43 #include <sys/cdefs.h> 44 __KERNEL_RCSID(0, "$NetBSD: sa11x0_io.c,v 1.19 2011/07/01 20:31:39 dyoung Exp $"); 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/queue.h> 49 50 #include <uvm/uvm.h> 51 52 #include <sys/bus.h> 53 #include <machine/pmap.h> 54 55 /* Prototypes for all the bus_space structure functions */ 56 57 bs_protos(sa11x0); 58 bs_protos(bs_notimpl); 59 60 /* Declare the sa11x0 bus space tag */ 61 62 struct bus_space sa11x0_bs_tag = { 63 /* cookie */ 64 NULL, 65 66 /* mapping/unmapping */ 67 sa11x0_bs_map, 68 sa11x0_bs_unmap, 69 sa11x0_bs_subregion, 70 71 /* allocation/deallocation */ 72 sa11x0_bs_alloc, 73 sa11x0_bs_free, 74 75 /* get kernel virtual address */ 76 sa11x0_bs_vaddr, 77 78 /* mmap bus space for userland */ 79 sa11x0_bs_mmap, 80 81 /* barrier */ 82 sa11x0_bs_barrier, 83 84 /* read (single) */ 85 sa11x0_bs_r_1, 86 sa11x0_bs_r_2, 87 sa11x0_bs_r_4, 88 bs_notimpl_bs_r_8, 89 90 /* read multiple */ 91 sa11x0_bs_rm_1, 92 sa11x0_bs_rm_2, 93 sa11x0_bs_rm_4, 94 bs_notimpl_bs_rm_8, 95 96 /* read region */ 97 bs_notimpl_bs_rr_1, 98 sa11x0_bs_rr_2, 99 bs_notimpl_bs_rr_4, 100 bs_notimpl_bs_rr_8, 101 102 /* write (single) */ 103 sa11x0_bs_w_1, 104 sa11x0_bs_w_2, 105 sa11x0_bs_w_4, 106 bs_notimpl_bs_w_8, 107 108 /* write multiple */ 109 sa11x0_bs_wm_1, 110 sa11x0_bs_wm_2, 111 sa11x0_bs_wm_4, 112 bs_notimpl_bs_wm_8, 113 114 /* write region */ 115 bs_notimpl_bs_wr_1, 116 sa11x0_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 sa11x0_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 sa11x0_bs_c_2, 135 bs_notimpl_bs_c_4, 136 bs_notimpl_bs_c_8, 137 }; 138 139 /* bus space functions */ 140 141 int 142 sa11x0_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int cacheable, 143 bus_space_handle_t *bshp) 144 { 145 u_long startpa, endpa, pa; 146 vaddr_t va; 147 pt_entry_t *pte; 148 const struct pmap_devmap *pd; 149 150 if ((pd = pmap_devmap_find_pa(bpa, size)) != NULL) { 151 /* Device was statically mapped. */ 152 *bshp = pd->pd_va + (bpa - pd->pd_pa); 153 return 0; 154 } 155 156 startpa = trunc_page(bpa); 157 endpa = round_page(bpa + size); 158 159 /* XXX use extent manager to check duplicate mapping */ 160 161 va = uvm_km_alloc(kernel_map, endpa - startpa, 0, 162 UVM_KMF_VAONLY | UVM_KMF_NOWAIT); 163 if (!va) 164 return ENOMEM; 165 166 *bshp = (bus_space_handle_t)(va + (bpa - startpa)); 167 168 for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) { 169 pmap_kenter_pa(va, pa, VM_PROT_READ | VM_PROT_WRITE, 0); 170 pte = vtopte(va); 171 if (cacheable == 0) { 172 *pte &= ~L2_S_CACHE_MASK; 173 PTE_SYNC(pte); 174 } 175 } 176 pmap_update(pmap_kernel()); 177 178 return 0; 179 } 180 181 int 182 sa11x0_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend, bus_size_t size, 183 bus_size_t alignment, bus_size_t boundary, int cacheable, 184 bus_addr_t *bpap, bus_space_handle_t *bshp) 185 { 186 187 panic("sa11x0_bs_alloc(): Help!"); 188 } 189 190 void 191 sa11x0_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size) 192 { 193 vaddr_t va, endva; 194 195 if (pmap_devmap_find_va(bsh, size) != NULL) { 196 /* Device was statically mapped; nothing to do. */ 197 return; 198 } 199 200 va = trunc_page(bsh); 201 endva = round_page(bsh + size); 202 203 pmap_kremove(va, endva - va); 204 pmap_update(pmap_kernel()); 205 206 uvm_km_free(kernel_map, va, endva - va, UVM_KMF_VAONLY); 207 } 208 209 void 210 sa11x0_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size) 211 { 212 213 panic("sa11x0_bs_free(): Help!"); 214 } 215 216 int 217 sa11x0_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset, 218 bus_size_t size, bus_space_handle_t *nbshp) 219 { 220 221 *nbshp = bsh + offset; 222 return 0; 223 } 224 225 paddr_t 226 sa11x0_bs_mmap(void *t, bus_addr_t paddr, off_t offset, int prot, int flags) 227 { 228 /* 229 * mmap from address `paddr+offset' for one page 230 */ 231 return arm_btop((paddr + offset)); 232 } 233 234 void * 235 sa11x0_bs_vaddr(void *t, bus_space_handle_t bsh) 236 { 237 return (void *)bsh; 238 } 239 240 void 241 sa11x0_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset, 242 bus_size_t len, int flags) 243 { 244 245 } 246