1 /* $NetBSD: sa11x0_io.c,v 1.22 2023/04/21 15:00:48 skrll Exp $ */ 2 3 /* 4 * Copyright (c) 1997 Mark Brinicombe. 5 * Copyright (c) 1997 Causality Limited. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Ichiro FUKUHARA. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by Mark Brinicombe. 22 * 4. The name of the company nor the name of the author may be used to 23 * endorse or promote products derived from this software without specific 24 * prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 27 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 28 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 29 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 30 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 31 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 32 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39 /* 40 * bus_space I/O functions for sa11x0 41 */ 42 43 #include <sys/cdefs.h> 44 __KERNEL_RCSID(0, "$NetBSD: sa11x0_io.c,v 1.22 2023/04/21 15:00:48 skrll Exp $"); 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/queue.h> 49 50 #include <uvm/uvm.h> 51 52 #include <sys/bus.h> 53 #include <machine/pmap.h> 54 55 /* Prototypes for all the bus_space structure functions */ 56 57 bs_protos(sa11x0); 58 bs_protos(bs_notimpl); 59 60 /* Declare the sa11x0 bus space tag */ 61 62 struct bus_space sa11x0_bs_tag = { 63 /* cookie */ 64 .bs_cookie = NULL, 65 66 /* mapping/unmapping */ 67 .bs_map = sa11x0_bs_map, 68 .bs_unmap = sa11x0_bs_unmap, 69 .bs_subregion = sa11x0_bs_subregion, 70 71 /* allocation/deallocation */ 72 .bs_alloc = sa11x0_bs_alloc, 73 .bs_free = sa11x0_bs_free, 74 75 /* get kernel virtual address */ 76 .bs_vaddr = sa11x0_bs_vaddr, 77 78 /* mmap bus space for userland */ 79 .bs_mmap = sa11x0_bs_mmap, 80 81 /* barrier */ 82 .bs_barrier = sa11x0_bs_barrier, 83 84 /* read (single) */ 85 .bs_r_1 = sa11x0_bs_r_1, 86 .bs_r_2 = sa11x0_bs_r_2, 87 .bs_r_4 = sa11x0_bs_r_4, 88 .bs_r_8 = bs_notimpl_bs_r_8, 89 90 /* read multiple */ 91 .bs_rm_1 = sa11x0_bs_rm_1, 92 .bs_rm_2 = sa11x0_bs_rm_2, 93 .bs_rm_4 = sa11x0_bs_rm_4, 94 .bs_rm_8 = bs_notimpl_bs_rm_8, 95 96 /* read region */ 97 .bs_rr_1 = bs_notimpl_bs_rr_1, 98 .bs_rr_2 = sa11x0_bs_rr_2, 99 .bs_rr_4 = bs_notimpl_bs_rr_4, 100 .bs_rr_8 = bs_notimpl_bs_rr_8, 101 102 /* write (single) */ 103 .bs_w_1 = sa11x0_bs_w_1, 104 .bs_w_2 = sa11x0_bs_w_2, 105 .bs_w_4 = sa11x0_bs_w_4, 106 .bs_w_8 = bs_notimpl_bs_w_8, 107 108 /* write multiple */ 109 .bs_wm_1 = sa11x0_bs_wm_1, 110 .bs_wm_2 = sa11x0_bs_wm_2, 111 .bs_wm_4 = sa11x0_bs_wm_4, 112 .bs_wm_8 = bs_notimpl_bs_wm_8, 113 114 /* write region */ 115 .bs_wr_1 = bs_notimpl_bs_wr_1, 116 .bs_wr_2 = sa11x0_bs_wr_2, 117 .bs_wr_4 = bs_notimpl_bs_wr_4, 118 .bs_wr_8 = bs_notimpl_bs_wr_8, 119 120 /* set multiple */ 121 .bs_sm_1 = bs_notimpl_bs_sm_1, 122 .bs_sm_2 = bs_notimpl_bs_sm_2, 123 .bs_sm_4 = bs_notimpl_bs_sm_4, 124 .bs_sm_8 = bs_notimpl_bs_sm_8, 125 126 /* set region */ 127 .bs_sr_1 = bs_notimpl_bs_sr_1, 128 .bs_sr_2 = sa11x0_bs_sr_2, 129 .bs_sr_4 = bs_notimpl_bs_sr_4, 130 .bs_sr_8 = bs_notimpl_bs_sr_8, 131 132 /* copy */ 133 .bs_c_1 = bs_notimpl_bs_c_1, 134 .bs_c_2 = sa11x0_bs_c_2, 135 .bs_c_4 = bs_notimpl_bs_c_4, 136 .bs_c_8 = bs_notimpl_bs_c_8, 137 }; 138 139 /* bus space functions */ 140 141 int 142 sa11x0_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flags, 143 bus_space_handle_t *bshp) 144 { 145 u_long startpa, endpa, pa; 146 vaddr_t va; 147 const struct pmap_devmap *pd; 148 149 if ((pd = pmap_devmap_find_pa(bpa, size)) != NULL) { 150 /* Device was statically mapped. */ 151 *bshp = pd->pd_va + (bpa - pd->pd_pa); 152 return 0; 153 } 154 155 startpa = trunc_page(bpa); 156 endpa = round_page(bpa + size); 157 158 /* XXX use extent manager to check duplicate mapping */ 159 160 va = uvm_km_alloc(kernel_map, endpa - startpa, 0, 161 UVM_KMF_VAONLY | UVM_KMF_NOWAIT); 162 if (!va) 163 return ENOMEM; 164 165 *bshp = (bus_space_handle_t)(va + (bpa - startpa)); 166 167 const int pmapflags = 168 (flags & (BUS_SPACE_MAP_CACHEABLE|BUS_SPACE_MAP_PREFETCHABLE)) 169 ? 0 170 : PMAP_NOCACHE; 171 172 for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) { 173 pmap_kenter_pa(va, pa, VM_PROT_READ | VM_PROT_WRITE, pmapflags); 174 } 175 pmap_update(pmap_kernel()); 176 177 return 0; 178 } 179 180 int 181 sa11x0_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend, bus_size_t size, 182 bus_size_t alignment, bus_size_t boundary, int cacheable, 183 bus_addr_t *bpap, bus_space_handle_t *bshp) 184 { 185 186 panic("sa11x0_bs_alloc(): Help!"); 187 } 188 189 void 190 sa11x0_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size) 191 { 192 vaddr_t va, endva; 193 194 if (pmap_devmap_find_va(bsh, size) != NULL) { 195 /* Device was statically mapped; nothing to do. */ 196 return; 197 } 198 199 va = trunc_page(bsh); 200 endva = round_page(bsh + size); 201 202 pmap_kremove(va, endva - va); 203 pmap_update(pmap_kernel()); 204 205 uvm_km_free(kernel_map, va, endva - va, UVM_KMF_VAONLY); 206 } 207 208 void 209 sa11x0_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size) 210 { 211 212 panic("sa11x0_bs_free(): Help!"); 213 } 214 215 int 216 sa11x0_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset, 217 bus_size_t size, bus_space_handle_t *nbshp) 218 { 219 220 *nbshp = bsh + offset; 221 return 0; 222 } 223 224 paddr_t 225 sa11x0_bs_mmap(void *t, bus_addr_t paddr, off_t offset, int prot, int flags) 226 { 227 /* 228 * mmap from address `paddr+offset' for one page 229 */ 230 return arm_btop((paddr + offset)); 231 } 232 233 void * 234 sa11x0_bs_vaddr(void *t, bus_space_handle_t bsh) 235 { 236 return (void *)bsh; 237 } 238 239 void 240 sa11x0_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset, 241 bus_size_t len, int flags) 242 { 243 244 } 245
Indexes created Tue Sep 30 11:09:46 GMT 2025