1/* $NetBSD: ixp425_space.c,v 1.7 2009/10/21 14:15:51 rmind Exp $ */ 2 3/* 4 * Copyright (c) 2003 5 * Ichiro FUKUHARA <ichiro@ichiro.org>. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR 21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30#include <sys/cdefs.h> 31__KERNEL_RCSID(0, "$NetBSD: ixp425_space.c,v 1.7 2009/10/21 14:15:51 rmind Exp $"); 32 33/* 34 * bus_space I/O functions for ixp425 35 */ 36 37#include <sys/param.h> 38#include <sys/systm.h> 39#include <sys/queue.h> 40 41#include <uvm/uvm.h> 42 43#include <sys/bus.h> 44 45#include <arm/xscale/ixp425reg.h> 46#include <arm/xscale/ixp425var.h> 47 48/* Proto types for all the bus_space structure functions */ 49bs_protos(ixp425); 50bs_protos(generic); 51bs_protos(generic_armv4); 52bs_protos(bs_notimpl); 53 54struct bus_space ixp425_bs_tag = { 55 /* cookie */ 56 (void *) 0, 57 58 /* mapping/unmapping */ 59 ixp425_bs_map, 60 ixp425_bs_unmap, 61 ixp425_bs_subregion, 62 63 /* allocation/deallocation */ 64 ixp425_bs_alloc, 65 ixp425_bs_free, 66 67 /* get kernel virtual address */ 68 ixp425_bs_vaddr, 69 70 /* mmap bus space for userland */ 71 ixp425_bs_mmap, 72 73 /* barrier */ 74 ixp425_bs_barrier, 75 76 /* read (single) */ 77 generic_bs_r_1, 78 generic_armv4_bs_r_2, 79 generic_bs_r_4, 80 bs_notimpl_bs_r_8, 81 82 /* read multiple */ 83 generic_bs_rm_1, 84 generic_armv4_bs_rm_2, 85 generic_bs_rm_4, 86 bs_notimpl_bs_rm_8, 87 88 /* read region */ 89 generic_bs_rr_1, 90 generic_armv4_bs_rr_2, 91 generic_bs_rr_4, 92 bs_notimpl_bs_rr_8, 93 94 /* write (single) */ 95 generic_bs_w_1, 96 generic_armv4_bs_w_2, 97 generic_bs_w_4, 98 bs_notimpl_bs_w_8, 99 100 /* write multiple */ 101 generic_bs_wm_1, 102 generic_armv4_bs_wm_2, 103 generic_bs_wm_4, 104 bs_notimpl_bs_wm_8, 105 106 /* write region */ 107 generic_bs_wr_1, 108 generic_armv4_bs_wr_2, 109 generic_bs_wr_4, 110 bs_notimpl_bs_wr_8, 111 112 /* set multiple */ 113 bs_notimpl_bs_sm_1, 114 bs_notimpl_bs_sm_2, 115 bs_notimpl_bs_sm_4, 116 bs_notimpl_bs_sm_8, 117 118 /* set region */ 119 bs_notimpl_bs_sr_1, 120 generic_armv4_bs_sr_2, 121 generic_bs_sr_4, 122 bs_notimpl_bs_sr_8, 123 124 /* copy */ 125 bs_notimpl_bs_c_1, 126 generic_armv4_bs_c_2, 127 bs_notimpl_bs_c_4, 128 bs_notimpl_bs_c_8, 129}; 130 131int 132ixp425_bs_map(void *t, bus_addr_t bpa, bus_size_t size, 133 int cacheable, bus_space_handle_t *bshp) 134{ 135 const struct pmap_devmap *pd; 136 137 paddr_t startpa; 138 paddr_t endpa; 139 paddr_t pa; 140 paddr_t offset; 141 vaddr_t va; 142 143 if ((pd = pmap_devmap_find_pa(bpa, size)) != NULL) { 144 /* Device was statically mapped. */ 145 *bshp = pd->pd_va + (bpa - pd->pd_pa); 146 return 0; 147 } 148 149 endpa = round_page(bpa + size); 150 offset = bpa & PAGE_MASK; 151 startpa = trunc_page(bpa); 152 153 /* Get some VM. */ 154 va = uvm_km_alloc(kernel_map, endpa - startpa, 0, 155 UVM_KMF_VAONLY | UVM_KMF_NOWAIT); 156 if (va == 0) 157 return ENOMEM; 158 159 /* Store the bus space handle */ 160 *bshp = va + offset; 161 162 /* Now map the pages */ 163 for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) { 164 pmap_enter(pmap_kernel(), va, pa, 165 VM_PROT_READ | VM_PROT_WRITE, 166 VM_PROT_READ | VM_PROT_WRITE | PMAP_WIRED); 167 } 168 pmap_update(pmap_kernel()); 169 170 return(0); 171} 172 173void 174ixp425_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size) 175{ 176 vaddr_t va; 177 vaddr_t endva; 178 179 if (pmap_devmap_find_va(bsh, size) != NULL) { 180 /* Device was statically mapped; nothing to do. */ 181 return; 182 } 183 184 endva = round_page(bsh + size); 185 va = trunc_page(bsh); 186 187 pmap_remove(pmap_kernel(), va, endva); 188 pmap_update(pmap_kernel()); 189 uvm_km_free(kernel_map, va, endva - va, UVM_KMF_VAONLY); 190} 191 192int 193ixp425_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend, 194 bus_size_t size, bus_size_t alignment, bus_size_t boundary, int cacheable, 195 bus_addr_t *bpap, bus_space_handle_t *bshp) 196{ 197 panic("ixp425_bs_alloc(): not implemented\n"); 198} 199 200void 201ixp425_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size) 202{ 203 panic("ixp425_bs_free(): not implemented\n"); 204} 205 206int 207ixp425_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset, 208 bus_size_t size, bus_space_handle_t *nbshp) 209{ 210 *nbshp = bsh + offset; 211 return (0); 212} 213 214void * 215ixp425_bs_vaddr(void *t, bus_space_handle_t bsh) 216{ 217 return ((void *)bsh); 218} 219 220paddr_t 221ixp425_bs_mmap(void *t, bus_addr_t addr, off_t off, int prot, int flags) 222{ 223 /* Not supported. */ 224 return (-1); 225} 226 227void 228ixp425_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset, 229 bus_size_t len, int flags) 230{ 231/* NULL */ 232} 233/* End of ixp425_space.c */ 234