imx23_space.c revision 1.1.2.3
1 /* $Id: imx23_space.c,v 1.1.2.3 2014/05/22 11:39:32 yamt Exp $ */ 2 3 /* 4 * Copyright (c) 2012 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Petri Laakso. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * bus_space(9) support for Freescale i.MX23 processor. 34 */ 35 36 #include <sys/param.h> 37 #include <sys/bus.h> 38 #include <sys/mutex.h> 39 #include <uvm/uvm_prot.h> 40 #include <machine/pcb.h> 41 #include <uvm/uvm_pmap.h> 42 #include <machine/bus_defs.h> 43 #include <machine/pmap.h> 44 45 46 int imx23_bs_map(void *, bus_addr_t, bus_size_t, int, bus_space_handle_t *); 47 void imx23_bs_unmap(void *, bus_space_handle_t, bus_size_t); 48 int imx23_bs_subregion(void *, bus_space_handle_t, bus_size_t, bus_size_t, 49 bus_space_handle_t *); 50 int imx23_bs_alloc(void *, bus_addr_t, bus_addr_t, bus_size_t, bus_size_t, 51 bus_size_t, int, bus_addr_t *, bus_space_handle_t *); 52 void imx23_bs_free(void *, bus_space_handle_t, bus_size_t); 53 void * imx23_bs_vaddr(void *, bus_space_handle_t); 54 paddr_t imx23_bs_mmap(void *, bus_addr_t, off_t, int, int); 55 void imx23_bs_barrier(void *, bus_space_handle_t, bus_size_t, 56 bus_size_t, int); 57 58 bs_protos(bs_notimpl); 59 bs_protos(generic); 60 bs_protos(generic_armv4); 61 62 /* Describes bus space on i.MX23 */ 63 struct bus_space imx23_bus_space = { 64 /* cookie */ 65 (void *) 0, 66 67 /* mapping/unmapping */ 68 imx23_bs_map, 69 imx23_bs_unmap, 70 imx23_bs_subregion, 71 72 /* allocation/deallocation */ 73 imx23_bs_alloc, 74 imx23_bs_free, 75 76 /* get kernel virtual address */ 77 imx23_bs_vaddr, 78 79 /* mmap bus space for user */ 80 imx23_bs_mmap, 81 82 /* barrier */ 83 imx23_bs_barrier, 84 85 /* read (single) */ 86 generic_bs_r_1, 87 generic_armv4_bs_r_2, 88 generic_bs_r_4, 89 bs_notimpl_bs_r_8, 90 91 /* read multiple */ 92 generic_bs_rm_1, 93 generic_armv4_bs_rm_2, 94 generic_bs_rm_4, 95 bs_notimpl_bs_rm_8, 96 97 /* read region */ 98 generic_bs_rr_1, 99 generic_armv4_bs_rr_2, 100 generic_bs_rr_4, 101 bs_notimpl_bs_rr_8, 102 103 /* write (single) */ 104 generic_bs_w_1, 105 generic_armv4_bs_w_2, 106 generic_bs_w_4, 107 bs_notimpl_bs_w_8, 108 109 /* write multiple */ 110 generic_bs_wm_1, 111 generic_armv4_bs_wm_2, 112 generic_bs_wm_4, 113 bs_notimpl_bs_wm_8, 114 115 /* write region */ 116 generic_bs_wr_1, 117 generic_armv4_bs_wr_2, 118 generic_bs_wr_4, 119 bs_notimpl_bs_wr_8, 120 121 /* set multiple */ 122 bs_notimpl_bs_sm_1, 123 bs_notimpl_bs_sm_2, 124 bs_notimpl_bs_sm_4, 125 bs_notimpl_bs_sm_8, 126 127 /* set region */ 128 generic_bs_sr_1, 129 generic_armv4_bs_sr_2, 130 generic_bs_sr_4, 131 bs_notimpl_bs_sr_8, 132 133 /* copy */ 134 bs_notimpl_bs_c_1, 135 generic_armv4_bs_c_2, 136 bs_notimpl_bs_c_4, 137 bs_notimpl_bs_c_8 138 }; 139 140 int 141 imx23_bs_map(void *space, bus_addr_t address, bus_size_t size, 142 int flags, bus_space_handle_t *handlep) 143 { 144 const struct pmap_devmap *pd; 145 146 if ((pd = pmap_devmap_find_pa(address, size)) != NULL) { 147 /* Device was statically mapped. */ 148 *handlep = pd->pd_va + (address - pd->pd_pa); 149 return 0; 150 } 151 152 return 0; 153 } 154 155 void 156 imx23_bs_unmap(void *space, bus_space_handle_t handle, bus_size_t size) 157 { 158 if (pmap_devmap_find_va(handle, size) != NULL) { 159 /* Device was statically mapped. */ 160 return; 161 } 162 163 return; 164 } 165 166 int 167 imx23_bs_subregion(void *space, bus_space_handle_t handle, 168 bus_size_t offset, bus_size_t size, bus_space_handle_t *nhandlep) 169 { 170 *nhandlep = handle + offset; 171 return 0; 172 } 173 174 int 175 imx23_bs_alloc(void *space, bus_addr_t reg_start, bus_addr_t reg_end, 176 bus_size_t size, bus_size_t alignment, 177 bus_size_t boundary, int flags, bus_addr_t *addrp, 178 bus_space_handle_t *handlep) 179 { 180 return 0; 181 } 182 183 void 184 imx23_bs_free(void *space, bus_space_handle_t handle, bus_size_t size) 185 { 186 return; 187 } 188 189 void * 190 imx23_bs_vaddr(void *space, bus_space_handle_t handle) 191 { 192 return (void *)0; 193 } 194 195 paddr_t 196 imx23_bs_mmap(void *space, bus_addr_t addr, off_t off, int prot, 197 int flags) 198 { 199 return (paddr_t)0; 200 } 201 202 void 203 imx23_bs_barrier(void *space, bus_space_handle_t handle, 204 bus_size_t offset, 205 bus_size_t length, int flags) 206 { 207 return; 208 } 209
Indexes created Wed Oct 01 13:09:50 GMT 2025