1 /* $NetBSD: ep93xx_space.c,v 1.4 2009/10/23 00:39:30 snj 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 * 16 * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR 20 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: ep93xx_space.c,v 1.4 2009/10/23 00:39:30 snj Exp $"); 31 32 /* 33 * bus_space I/O functions for ep93xx 34 */ 35 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 #include <sys/queue.h> 39 40 #include <uvm/uvm.h> 41 42 #include <machine/bus.h> 43 44 #include <arm/ep93xx/ep93xxreg.h> 45 #include <arm/ep93xx/ep93xxvar.h> 46 47 /* Proto types for all the bus_space structure functions */ 48 bs_protos(ep93xx); 49 bs_protos(generic); 50 bs_protos(generic_armv4); 51 bs_protos(bs_notimpl); 52 53 struct bus_space ep93xx_bs_tag = { 54 /* cookie */ 55 (void *) 0, 56 57 /* mapping/unmapping */ 58 ep93xx_bs_map, 59 ep93xx_bs_unmap, 60 ep93xx_bs_subregion, 61 62 /* allocation/deallocation */ 63 ep93xx_bs_alloc, 64 ep93xx_bs_free, 65 66 /* get kernel virtual address */ 67 ep93xx_bs_vaddr, 68 69 /* mmap bus space for userland */ 70 ep93xx_bs_mmap, 71 72 /* barrier */ 73 ep93xx_bs_barrier, 74 75 /* read (single) */ 76 generic_bs_r_1, 77 generic_armv4_bs_r_2, 78 generic_bs_r_4, 79 bs_notimpl_bs_r_8, 80 81 /* read multiple */ 82 generic_bs_rm_1, 83 generic_armv4_bs_rm_2, 84 generic_bs_rm_4, 85 bs_notimpl_bs_rm_8, 86 87 /* read region */ 88 generic_bs_rr_1, 89 generic_armv4_bs_rr_2, 90 generic_bs_rr_4, 91 bs_notimpl_bs_rr_8, 92 93 /* write (single) */ 94 generic_bs_w_1, 95 generic_armv4_bs_w_2, 96 generic_bs_w_4, 97 bs_notimpl_bs_w_8, 98 99 /* write multiple */ 100 generic_bs_wm_1, 101 generic_armv4_bs_wm_2, 102 generic_bs_wm_4, 103 bs_notimpl_bs_wm_8, 104 105 /* write region */ 106 generic_bs_wr_1, 107 generic_armv4_bs_wr_2, 108 generic_bs_wr_4, 109 bs_notimpl_bs_wr_8, 110 111 /* set multiple */ 112 bs_notimpl_bs_sm_1, 113 bs_notimpl_bs_sm_2, 114 bs_notimpl_bs_sm_4, 115 bs_notimpl_bs_sm_8, 116 117 /* set region */ 118 bs_notimpl_bs_sr_1, 119 generic_armv4_bs_sr_2, 120 generic_bs_sr_4, 121 bs_notimpl_bs_sr_8, 122 123 /* copy */ 124 bs_notimpl_bs_c_1, 125 generic_armv4_bs_c_2, 126 bs_notimpl_bs_c_4, 127 bs_notimpl_bs_c_8, 128 }; 129 130 int 131 ep93xx_bs_map(void *t, bus_addr_t bpa, bus_size_t size, 132 int cacheable, bus_space_handle_t *bshp) 133 { 134 const struct pmap_devmap *pd; 135 136 paddr_t startpa; 137 paddr_t endpa; 138 paddr_t pa; 139 paddr_t offset; 140 vaddr_t va; 141 142 if ((pd = pmap_devmap_find_pa(bpa, size)) != NULL) { 143 /* Device was statically mapped. */ 144 *bshp = pd->pd_va + (bpa - pd->pd_pa); 145 return 0; 146 } 147 148 endpa = round_page(bpa + size); 149 offset = bpa & PAGE_MASK; 150 startpa = trunc_page(bpa); 151 152 /* Get some VM. */ 153 va = uvm_km_alloc(kernel_map, endpa - startpa, 0, 154 UVM_KMF_VAONLY | UVM_KMF_NOWAIT); 155 if (va == 0) 156 return ENOMEM; 157 158 /* Store the bus space handle */ 159 *bshp = va + offset; 160 161 /* Now map the pages */ 162 for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) { 163 pmap_enter(pmap_kernel(), va, pa, 164 VM_PROT_READ | VM_PROT_WRITE, 165 VM_PROT_READ | VM_PROT_WRITE | PMAP_WIRED); 166 } 167 pmap_update(pmap_kernel()); 168 169 return(0); 170 } 171 172 void 173 ep93xx_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size) 174 { 175 vaddr_t va; 176 vaddr_t endva; 177 178 if (pmap_devmap_find_va(bsh, size) != NULL) { 179 /* Device was statically mapped; nothing to do. */ 180 return; 181 } 182 183 endva = round_page(bsh + size); 184 va = trunc_page(bsh); 185 186 pmap_remove(pmap_kernel(), va, endva); 187 pmap_update(pmap_kernel()); 188 uvm_km_free(kernel_map, va, endva - va, UVM_KMF_VAONLY); 189 } 190 191 int 192 ep93xx_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend, 193 bus_size_t size, bus_size_t alignment, bus_size_t boundary, int cacheable, 194 bus_addr_t *bpap, bus_space_handle_t *bshp) 195 { 196 panic("ep93xx_bs_alloc(): not implemented\n"); 197 } 198 199 void 200 ep93xx_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size) 201 { 202 panic("ep93xx_bs_free(): not implemented\n"); 203 } 204 205 int 206 ep93xx_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset, 207 bus_size_t size, bus_space_handle_t *nbshp) 208 { 209 *nbshp = bsh + offset; 210 return (0); 211 } 212 213 void * 214 ep93xx_bs_vaddr(void *t, bus_space_handle_t bsh) 215 { 216 return ((void *)bsh); 217 } 218 219 paddr_t 220 ep93xx_bs_mmap(void *t, bus_addr_t addr, off_t off, int prot, int flags) 221 { 222 /* Not supported. */ 223 return (-1); 224 } 225 226 void 227 ep93xx_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset, 228 bus_size_t len, int flags) 229 { 230 /* NULL */ 231 } 232 /* End of ep93xx_space.c */ 233