imx23_space.c revision 1.1.2.2
1 /* $Id: imx23_space.c,v 1.1.2.2 2013/01/16 05:32:47 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 #include <sys/bus.h> 36 #include <sys/mutex.h> 37 #include <uvm/uvm_prot.h> 38 #include <machine/pcb.h> 39 #include <uvm/uvm_pmap.h> 40 #include <machine/bus_defs.h> 41 #include <machine/pmap.h> 42 43 int imx23_bs_map(void *, bus_addr_t, bus_size_t, int, bus_space_handle_t *); 44 void imx23_bs_unmap(void *, bus_space_handle_t, bus_size_t); 45 int imx23_bs_subregion(void *, bus_space_handle_t, bus_size_t, bus_size_t, 46 bus_space_handle_t *); 47 int imx23_bs_alloc(void *, bus_addr_t, bus_addr_t, bus_size_t, bus_size_t, 48 bus_size_t, int, bus_addr_t *, bus_space_handle_t *); 49 void imx23_bs_free(void *, bus_space_handle_t, bus_size_t); 50 void * imx23_bs_vaddr(void *, bus_space_handle_t); 51 paddr_t imx23_bs_mmap(void *, bus_addr_t, off_t, int, int); 52 void imx23_bs_barrier(void *, bus_space_handle_t, bus_size_t, 53 bus_size_t, int); 54 55 bs_protos(bs_notimpl); 56 bs_protos(generic); 57 bs_protos(generic_armv4); 58 59 /* Describes bus space on i.MX23 */ 60 struct bus_space imx23_bus_space = { 61 /* cookie */ 62 (void *) 0, 63 64 /* mapping/unmapping */ 65 imx23_bs_map, 66 imx23_bs_unmap, 67 imx23_bs_subregion, 68 69 /* allocation/deallocation */ 70 imx23_bs_alloc, 71 imx23_bs_free, 72 73 /* get kernel virtual address */ 74 imx23_bs_vaddr, 75 76 /* mmap bus space for user */ 77 imx23_bs_mmap, 78 79 /* barrier */ 80 imx23_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 generic_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 int 138 imx23_bs_map(void *space, bus_addr_t address, bus_size_t size, 139 int flags, bus_space_handle_t *handlep) 140 { 141 const struct pmap_devmap *pd; 142 143 if ((pd = pmap_devmap_find_pa(address, size)) != NULL) { 144 /* Device was statically mapped. */ 145 *handlep = pd->pd_va + (address - pd->pd_pa); 146 return 0; 147 } 148 149 return 0; 150 } 151 152 void 153 imx23_bs_unmap(void *space, bus_space_handle_t handle, bus_size_t size) 154 { 155 if (pmap_devmap_find_va(handle, size) != NULL) { 156 /* Device was statically mapped. */ 157 return; 158 } 159 160 return; 161 } 162 163 int 164 imx23_bs_subregion(void *space, bus_space_handle_t handle, 165 bus_size_t offset, bus_size_t size, bus_space_handle_t *nhandlep) 166 { 167 *nhandlep = handle + offset; 168 return 0; 169 } 170 171 int 172 imx23_bs_alloc(void *space, bus_addr_t reg_start, bus_addr_t reg_end, 173 bus_size_t size, bus_size_t alignment, 174 bus_size_t boundary, int flags, bus_addr_t *addrp, 175 bus_space_handle_t *handlep) 176 { 177 return 0; 178 } 179 180 void 181 imx23_bs_free(void *space, bus_space_handle_t handle, bus_size_t size) 182 { 183 return; 184 } 185 186 void * 187 imx23_bs_vaddr(void *space, bus_space_handle_t handle) 188 { 189 return (void *)0; 190 } 191 192 paddr_t 193 imx23_bs_mmap(void *space, bus_addr_t addr, off_t off, int prot, 194 int flags) 195 { 196 return (paddr_t)0; 197 } 198 199 void 200 imx23_bs_barrier(void *space, bus_space_handle_t handle, 201 bus_size_t offset, 202 bus_size_t length, int flags) 203 { 204 return; 205 } 206
Indexes created Wed Oct 01 13:09:50 GMT 2025