1 /* $NetBSD: clps711x_space.c,v 1.2 2018/03/16 17:56:31 ryo 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: clps711x_space.c,v 1.2 2018/03/16 17:56:31 ryo Exp $"); 31 32 /* 33 * bus_space I/O functions for clps711x 34 */ 35 36 #include <sys/param.h> 37 #include <sys/bus.h> 38 #include <sys/systm.h> 39 40 #include <uvm/uvm_extern.h> 41 42 #include <machine/pmap.h> 43 44 /* Proto types for all the bus_space structure functions */ 45 bs_protos(clps711x); 46 bs_protos(generic); 47 bs_protos(bs_notimpl); 48 49 struct bus_space clps711x_bs_tag = { 50 /* cookie */ 51 .bs_cookie = (void *) 0, 52 53 /* mapping/unmapping */ 54 .bs_map = clps711x_bs_map, 55 .bs_unmap = clps711x_bs_unmap, 56 .bs_subregion = clps711x_bs_subregion, 57 58 /* allocation/deallocation */ 59 .bs_alloc = clps711x_bs_alloc, 60 .bs_free = clps711x_bs_free, 61 62 /* get kernel virtual address */ 63 .bs_vaddr = clps711x_bs_vaddr, 64 65 /* mmap bus space for userland */ 66 .bs_mmap = clps711x_bs_mmap, 67 68 /* barrier */ 69 .bs_barrier = clps711x_bs_barrier, 70 71 /* read (single) */ 72 .bs_r_1 = generic_bs_r_1, 73 .bs_r_2 = bs_notimpl_bs_r_2, /* XXXX */ 74 .bs_r_4 = generic_bs_r_4, 75 .bs_r_8 = bs_notimpl_bs_r_8, 76 77 /* read multiple */ 78 .bs_rm_1 = generic_bs_rm_1, 79 .bs_rm_2 = bs_notimpl_bs_rm_2, /* XXXX */ 80 .bs_rm_4 = generic_bs_rm_4, 81 .bs_rm_8 = bs_notimpl_bs_rm_8, 82 83 /* read region */ 84 .bs_rr_1 = generic_bs_rr_1, 85 .bs_rr_2 = bs_notimpl_bs_rr_2, /* XXXX */ 86 .bs_rr_4 = generic_bs_rr_4, 87 .bs_rr_8 = bs_notimpl_bs_rr_8, 88 89 /* write (single) */ 90 .bs_w_1 = generic_bs_w_1, 91 .bs_w_2 = bs_notimpl_bs_w_2, /* XXXX */ 92 .bs_w_4 = generic_bs_w_4, 93 .bs_w_8 = bs_notimpl_bs_w_8, 94 95 /* write multiple */ 96 .bs_wm_1 = generic_bs_wm_1, 97 .bs_wm_2 = bs_notimpl_bs_wm_2, /* XXXX */ 98 .bs_wm_4 = generic_bs_wm_4, 99 .bs_wm_8 = bs_notimpl_bs_wm_8, 100 101 /* write region */ 102 .bs_wr_1 = generic_bs_wr_1, 103 .bs_wr_2 = bs_notimpl_bs_wr_2, /* XXXX */ 104 .bs_wr_4 = generic_bs_wr_4, 105 .bs_wr_8 = bs_notimpl_bs_wr_8, 106 107 /* set multiple */ 108 .bs_sm_1 = bs_notimpl_bs_sm_1, 109 .bs_sm_2 = bs_notimpl_bs_sm_2, 110 .bs_sm_4 = bs_notimpl_bs_sm_4, 111 .bs_sm_8 = bs_notimpl_bs_sm_8, 112 113 /* set region */ 114 .bs_sr_1 = bs_notimpl_bs_sr_1, 115 .bs_sr_2 = bs_notimpl_bs_sr_2, /* XXXX */ 116 .bs_sr_4 = generic_bs_sr_4, 117 .bs_sr_8 = bs_notimpl_bs_sr_8, 118 119 /* copy */ 120 .bs_c_1 = bs_notimpl_bs_c_1, 121 .bs_c_2 = bs_notimpl_bs_c_2, /* XXXX */ 122 .bs_c_4 = bs_notimpl_bs_c_4, 123 .bs_c_8 = bs_notimpl_bs_c_8, 124 }; 125 126 int 127 clps711x_bs_map(void *t, bus_addr_t bpa, bus_size_t size, 128 int cacheable, bus_space_handle_t *bshp) 129 { 130 const struct pmap_devmap *pd; 131 paddr_t startpa, endpa, pa, offset; 132 vaddr_t va; 133 134 if ((pd = pmap_devmap_find_pa(bpa, size)) != NULL) { 135 /* Device was statically mapped. */ 136 *bshp = pd->pd_va + (bpa - pd->pd_pa); 137 return 0; 138 } 139 140 endpa = round_page(bpa + size); 141 offset = bpa & PAGE_MASK; 142 startpa = trunc_page(bpa); 143 144 /* Get some VM. */ 145 va = uvm_km_alloc(kernel_map, endpa - startpa, 0, 146 UVM_KMF_VAONLY | UVM_KMF_NOWAIT); 147 if (va == 0) 148 return ENOMEM; 149 150 /* Store the bus space handle */ 151 *bshp = va + offset; 152 153 /* Now map the pages */ 154 for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) { 155 pmap_enter(pmap_kernel(), va, pa, 156 VM_PROT_READ | VM_PROT_WRITE, 157 VM_PROT_READ | VM_PROT_WRITE | PMAP_WIRED); 158 } 159 pmap_update(pmap_kernel()); 160 161 return 0; 162 } 163 164 void 165 clps711x_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size) 166 { 167 vaddr_t va, endva; 168 169 if (pmap_devmap_find_va(bsh, size) != NULL) 170 /* Device was statically mapped; nothing to do. */ 171 return; 172 173 endva = round_page(bsh + size); 174 va = trunc_page(bsh); 175 176 pmap_remove(pmap_kernel(), va, endva); 177 pmap_update(pmap_kernel()); 178 uvm_km_free(kernel_map, va, endva - va, UVM_KMF_VAONLY); 179 } 180 181 int 182 clps711x_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("clps711x_bs_alloc(): not implemented\n"); 188 } 189 190 void 191 clps711x_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size) 192 { 193 194 panic("clps711x_bs_free(): not implemented\n"); 195 } 196 197 int 198 clps711x_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset, 199 bus_size_t size, bus_space_handle_t *nbshp) 200 { 201 202 *nbshp = bsh + offset; 203 return 0; 204 } 205 206 void * 207 clps711x_bs_vaddr(void *t, bus_space_handle_t bsh) 208 { 209 210 return (void *)bsh; 211 } 212 213 paddr_t 214 clps711x_bs_mmap(void *t, bus_addr_t addr, off_t off, int prot, int flags) 215 { 216 /* Not supported. */ 217 return -1; 218 } 219 220 void 221 clps711x_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset, 222 bus_size_t len, int flags) 223 { 224 /* Nothing */ 225 } 226
Indexes created Sat Sep 20 22:09:52 GMT 2025