Annotation of sys/arch/armish/dev/obio_space.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: obio_space.c,v 1.2 2006/05/29 17:30:26 drahn Exp $ */
! 2: /* $NetBSD: obio_space.c,v 1.9 2005/11/24 13:08:33 yamt Exp $ */
! 3:
! 4:
! 5: /*
! 6: * Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc.
! 7: * All rights reserved.
! 8: *
! 9: * Written by Jason R. Thorpe for Wasabi Systems, Inc.
! 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 for the NetBSD Project by
! 22: * Wasabi Systems, Inc.
! 23: * 4. The name of Wasabi Systems, Inc. may not be used to endorse
! 24: * or promote products derived from this software without specific prior
! 25: * written permission.
! 26: *
! 27: * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
! 28: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
! 29: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
! 30: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
! 31: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
! 32: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
! 33: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! 34: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! 35: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! 36: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! 37: * POSSIBILITY OF SUCH DAMAGE.
! 38: */
! 39:
! 40: /*
! 41: * bus_space functions for IQ80321 on-board devices
! 42: */
! 43:
! 44: #include <sys/param.h>
! 45: #include <sys/systm.h>
! 46:
! 47: #include <uvm/uvm_extern.h>
! 48:
! 49: #include <machine/bus.h>
! 50:
! 51: /* Prototypes for all the bus_space structure functions */
! 52: bs_protos(obio);
! 53: bs_protos(generic);
! 54: bs_protos(generic_armv4);
! 55: bs_protos(bs_notimpl);
! 56:
! 57: /*
! 58: * The obio bus space tag. This is constant for all instances, so
! 59: * we never have to explicitly "create" it.
! 60: */
! 61: struct bus_space obio_bs_tag = {
! 62: /* cookie */
! 63: (void *) 0,
! 64:
! 65: /* mapping/unmapping */
! 66: obio_bs_map,
! 67: obio_bs_unmap,
! 68: obio_bs_subregion,
! 69:
! 70: /* allocation/deallocation */
! 71: obio_bs_alloc,
! 72: obio_bs_free,
! 73:
! 74: /* get kernel virtual address */
! 75: obio_bs_vaddr,
! 76:
! 77: /* mmap */
! 78: bs_notimpl_bs_mmap,
! 79:
! 80: /* barrier */
! 81: obio_bs_barrier,
! 82:
! 83: /* read (single) */
! 84: generic_bs_r_1,
! 85: generic_armv4_bs_r_2,
! 86: generic_bs_r_4,
! 87: bs_notimpl_bs_r_8,
! 88:
! 89: /* read multiple */
! 90: generic_bs_rm_1,
! 91: generic_armv4_bs_rm_2,
! 92: bs_notimpl_bs_rm_4,
! 93: bs_notimpl_bs_rm_8,
! 94:
! 95: /* read region */
! 96: generic_bs_rr_1,
! 97: bs_notimpl_bs_rr_2,
! 98: bs_notimpl_bs_rr_4,
! 99: bs_notimpl_bs_rr_8,
! 100:
! 101: /* write (single) */
! 102: generic_bs_w_1,
! 103: generic_armv4_bs_w_2,
! 104: generic_bs_w_4,
! 105: bs_notimpl_bs_w_8,
! 106:
! 107: /* write multiple */
! 108: generic_bs_wm_1,
! 109: generic_armv4_bs_wm_2,
! 110: bs_notimpl_bs_wm_4,
! 111: bs_notimpl_bs_wm_8,
! 112:
! 113: /* write region */
! 114: bs_notimpl_bs_wr_1,
! 115: bs_notimpl_bs_wr_2,
! 116: bs_notimpl_bs_wr_4,
! 117: bs_notimpl_bs_wr_8,
! 118:
! 119: /* set multiple */
! 120: bs_notimpl_bs_sm_1,
! 121: bs_notimpl_bs_sm_2,
! 122: bs_notimpl_bs_sm_4,
! 123: bs_notimpl_bs_sm_8,
! 124:
! 125: /* set region */
! 126: bs_notimpl_bs_sr_1,
! 127: bs_notimpl_bs_sr_2,
! 128: bs_notimpl_bs_sr_4,
! 129: bs_notimpl_bs_sr_8,
! 130:
! 131: /* copy */
! 132: bs_notimpl_bs_c_1,
! 133: bs_notimpl_bs_c_2,
! 134: bs_notimpl_bs_c_4,
! 135: bs_notimpl_bs_c_8,
! 136: };
! 137:
! 138: int
! 139: obio_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flag,
! 140: bus_space_handle_t *bshp)
! 141: {
! 142: const struct pmap_devmap *pd;
! 143: paddr_t startpa, endpa, pa;
! 144: vaddr_t va;
! 145: pt_entry_t *pte;
! 146:
! 147: if ((pd = pmap_devmap_find_pa(bpa, size)) != NULL) {
! 148: /* Device was statically mapped. */
! 149: *bshp = pd->pd_va + (bpa - pd->pd_pa);
! 150: return (0);
! 151: }
! 152:
! 153: endpa = round_page(bpa + size);
! 154: startpa = trunc_page(bpa);
! 155:
! 156: va = uvm_km_valloc(kernel_map, endpa - startpa);
! 157: if (va == 0)
! 158: return(ENOMEM);
! 159:
! 160: *bshp = (bus_space_handle_t)(va + (bpa - startpa));
! 161:
! 162: for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) {
! 163: pmap_kenter_pa(va, pa, VM_PROT_READ | VM_PROT_WRITE);
! 164: if ((flag & BUS_SPACE_MAP_CACHEABLE) == 0) {
! 165: pte = vtopte(va);
! 166: *pte &= ~L2_S_CACHE_MASK;
! 167: PTE_SYNC(pte);
! 168: }
! 169: }
! 170: pmap_update(pmap_kernel());
! 171:
! 172: return (0);
! 173: }
! 174:
! 175: int
! 176: obio_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend, bus_size_t size,
! 177: bus_size_t alignment, bus_size_t boundary, int flags, bus_addr_t *bpap,
! 178: bus_space_handle_t *bshp)
! 179: {
! 180:
! 181: panic("obio_bs_alloc(): not implemented");
! 182: }
! 183:
! 184:
! 185: void
! 186: obio_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size)
! 187: {
! 188: vaddr_t va, endva;
! 189:
! 190: if (pmap_devmap_find_va(bsh, size) != NULL) {
! 191: /* Device was statically mapped; nothing to do. */
! 192: return;
! 193: }
! 194:
! 195: endva = round_page(bsh + size);
! 196: va = trunc_page(bsh);
! 197:
! 198: pmap_kremove(va, endva - va);
! 199: uvm_km_free(kernel_map, va, endva - va);
! 200: }
! 201:
! 202: void
! 203: obio_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size)
! 204: {
! 205:
! 206: panic("obio_bs_free(): not implemented");
! 207: }
! 208:
! 209: int
! 210: obio_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset,
! 211: bus_size_t size, bus_space_handle_t *nbshp)
! 212: {
! 213:
! 214: *nbshp = bsh + offset;
! 215: return (0);
! 216: }
! 217:
! 218: void *
! 219: obio_bs_vaddr(void *t, bus_space_handle_t bsh)
! 220: {
! 221:
! 222: return ((void *)bsh);
! 223: }
! 224:
! 225: void
! 226: obio_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset,
! 227: bus_size_t len, int flags)
! 228: {
! 229:
! 230: /* Nothing to do. */
! 231: }
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