1 /* $NetBSD: ep93xx_space.c,v 1.3 2005/11/24 13:08:32 yamt Exp $ */ 2 3 /* 4 * Copyright (c) 2004 Jesse Off 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Ichiro FUKUHARA. 18 * 4. The name of the company nor the name of the author may be used to 19 * endorse or promote products derived from this software without specific 20 * prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR 26 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 __KERNEL_RCSID(0, "$NetBSD: ep93xx_space.c,v 1.3 2005/11/24 13:08:32 yamt Exp $"); 37 38 /* 39 * bus_space I/O functions for ep93xx 40 */ 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/queue.h> 45 46 #include <uvm/uvm.h> 47 48 #include <machine/bus.h> 49 50 #include <arm/ep93xx/ep93xxreg.h> 51 #include <arm/ep93xx/ep93xxvar.h> 52 53 /* Proto types for all the bus_space structure functions */ 54 bs_protos(ep93xx); 55 bs_protos(generic); 56 bs_protos(generic_armv4); 57 bs_protos(bs_notimpl); 58 59 struct bus_space ep93xx_bs_tag = { 60 /* cookie */ 61 (void *) 0, 62 63 /* mapping/unmapping */ 64 ep93xx_bs_map, 65 ep93xx_bs_unmap, 66 ep93xx_bs_subregion, 67 68 /* allocation/deallocation */ 69 ep93xx_bs_alloc, 70 ep93xx_bs_free, 71 72 /* get kernel virtual address */ 73 ep93xx_bs_vaddr, 74 75 /* mmap bus space for userland */ 76 ep93xx_bs_mmap, 77 78 /* barrier */ 79 ep93xx_bs_barrier, 80 81 /* read (single) */ 82 generic_bs_r_1, 83 generic_armv4_bs_r_2, 84 generic_bs_r_4, 85 bs_notimpl_bs_r_8, 86 87 /* read multiple */ 88 generic_bs_rm_1, 89 generic_armv4_bs_rm_2, 90 generic_bs_rm_4, 91 bs_notimpl_bs_rm_8, 92 93 /* read region */ 94 generic_bs_rr_1, 95 generic_armv4_bs_rr_2, 96 generic_bs_rr_4, 97 bs_notimpl_bs_rr_8, 98 99 /* write (single) */ 100 generic_bs_w_1, 101 generic_armv4_bs_w_2, 102 generic_bs_w_4, 103 bs_notimpl_bs_w_8, 104 105 /* write multiple */ 106 generic_bs_wm_1, 107 generic_armv4_bs_wm_2, 108 generic_bs_wm_4, 109 bs_notimpl_bs_wm_8, 110 111 /* write region */ 112 generic_bs_wr_1, 113 generic_armv4_bs_wr_2, 114 generic_bs_wr_4, 115 bs_notimpl_bs_wr_8, 116 117 /* set multiple */ 118 bs_notimpl_bs_sm_1, 119 bs_notimpl_bs_sm_2, 120 bs_notimpl_bs_sm_4, 121 bs_notimpl_bs_sm_8, 122 123 /* set region */ 124 bs_notimpl_bs_sr_1, 125 generic_armv4_bs_sr_2, 126 generic_bs_sr_4, 127 bs_notimpl_bs_sr_8, 128 129 /* copy */ 130 bs_notimpl_bs_c_1, 131 generic_armv4_bs_c_2, 132 bs_notimpl_bs_c_4, 133 bs_notimpl_bs_c_8, 134 }; 135 136 int 137 ep93xx_bs_map(void *t, bus_addr_t bpa, bus_size_t size, 138 int cacheable, bus_space_handle_t *bshp) 139 { 140 const struct pmap_devmap *pd; 141 142 paddr_t startpa; 143 paddr_t endpa; 144 paddr_t pa; 145 paddr_t offset; 146 vaddr_t va; 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 /* Get some VM. */ 159 va = uvm_km_alloc(kernel_map, endpa - startpa, 0, 160 UVM_KMF_VAONLY | UVM_KMF_NOWAIT); 161 if (va == 0) 162 return ENOMEM; 163 164 /* Store the bus space handle */ 165 *bshp = va + offset; 166 167 /* Now map the pages */ 168 for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) { 169 pmap_enter(pmap_kernel(), va, pa, 170 VM_PROT_READ | VM_PROT_WRITE, 171 VM_PROT_READ | VM_PROT_WRITE | PMAP_WIRED); 172 } 173 pmap_update(pmap_kernel()); 174 175 return(0); 176 } 177 178 void 179 ep93xx_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size) 180 { 181 vaddr_t va; 182 vaddr_t endva; 183 184 if (pmap_devmap_find_va(bsh, size) != NULL) { 185 /* Device was statically mapped; nothing to do. */ 186 return; 187 } 188 189 endva = round_page(bsh + size); 190 va = trunc_page(bsh); 191 192 pmap_remove(pmap_kernel(), va, endva); 193 pmap_update(pmap_kernel()); 194 uvm_km_free(kernel_map, va, endva - va, UVM_KMF_VAONLY); 195 } 196 197 int 198 ep93xx_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend, 199 bus_size_t size, bus_size_t alignment, bus_size_t boundary, int cacheable, 200 bus_addr_t *bpap, bus_space_handle_t *bshp) 201 { 202 panic("ep93xx_bs_alloc(): not implemented\n"); 203 } 204 205 void 206 ep93xx_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size) 207 { 208 panic("ep93xx_bs_free(): not implemented\n"); 209 } 210 211 int 212 ep93xx_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset, 213 bus_size_t size, bus_space_handle_t *nbshp) 214 { 215 *nbshp = bsh + offset; 216 return (0); 217 } 218 219 void * 220 ep93xx_bs_vaddr(void *t, bus_space_handle_t bsh) 221 { 222 return ((void *)bsh); 223 } 224 225 paddr_t 226 ep93xx_bs_mmap(void *t, bus_addr_t addr, off_t off, int prot, int flags) 227 { 228 /* Not supported. */ 229 return (-1); 230 } 231 232 void 233 ep93xx_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset, 234 bus_size_t len, int flags) 235 { 236 /* NULL */ 237 } 238 /* End of ep93xx_space.c */ 239