Annotation of sys/arch/arm/s3c2xx0/s3c2xx0_space.c, Revision 1.1
1.1 ! nbrk 1: /* $NetBSD: s3c2xx0_space.c,v 1.7 2005/11/24 13:08:32 yamt Exp $ */
! 2:
! 3: /*
! 4: * Copyright (c) 2002 Fujitsu Component Limited
! 5: * Copyright (c) 2002 Genetec Corporation
! 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: * 3. Neither the name of The Fujitsu Component Limited nor the name of
! 17: * Genetec corporation may not be used to endorse or promote products
! 18: * derived from this software without specific prior written permission.
! 19: *
! 20: * THIS SOFTWARE IS PROVIDED BY FUJITSU COMPONENT LIMITED AND GENETEC
! 21: * CORPORATION ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
! 22: * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
! 23: * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
! 24: * DISCLAIMED. IN NO EVENT SHALL FUJITSU COMPONENT LIMITED OR GENETEC
! 25: * CORPORATION BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
! 26: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
! 27: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
! 28: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
! 29: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
! 30: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
! 31: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 32: * SUCH DAMAGE.
! 33: */
! 34: /* derived from sa11x0_io.c */
! 35:
! 36: /*
! 37: * Copyright (c) 1997 Mark Brinicombe.
! 38: * Copyright (c) 1997 Causality Limited.
! 39: * All rights reserved.
! 40: *
! 41: * This code is derived from software contributed to The NetBSD Foundation
! 42: * by Ichiro FUKUHARA.
! 43: *
! 44: * Redistribution and use in source and binary forms, with or without
! 45: * modification, are permitted provided that the following conditions
! 46: * are met:
! 47: * 1. Redistributions of source code must retain the above copyright
! 48: * notice, this list of conditions and the following disclaimer.
! 49: * 2. Redistributions in binary form must reproduce the above copyright
! 50: * notice, this list of conditions and the following disclaimer in the
! 51: * documentation and/or other materials provided with the distribution.
! 52: * 3. All advertising materials mentioning features or use of this software
! 53: * must display the following acknowledgement:
! 54: * This product includes software developed by Mark Brinicombe.
! 55: * 4. The name of the company nor the name of the author may be used to
! 56: * endorse or promote products derived from this software without specific
! 57: * prior written permission.
! 58: *
! 59: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
! 60: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
! 61: * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 62: * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
! 63: * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
! 64: * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
! 65: * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 66: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 67: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 68: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 69: * SUCH DAMAGE.
! 70: */
! 71:
! 72: /*
! 73: * bus_space functions for Samsung S3C2800/2400/2410.
! 74: */
! 75:
! 76: #include <sys/cdefs.h>
! 77: __KERNEL_RCSID(0, "$NetBSD: s3c2xx0_space.c,v 1.7 2005/11/24 13:08:32 yamt Exp $");
! 78:
! 79: #include <sys/param.h>
! 80: #include <sys/systm.h>
! 81:
! 82: #include <uvm/uvm_extern.h>
! 83:
! 84: #include <machine/bus.h>
! 85:
! 86: /* Prototypes for all the bus_space structure functions */
! 87: bs_protos(s3c2xx0);
! 88: bs_protos(generic);
! 89: bs_protos(generic_armv4);
! 90: bs_protos(bs_notimpl);
! 91:
! 92: struct bus_space s3c2xx0_bs_tag = {
! 93: /* cookie */
! 94: (void *) 0,
! 95:
! 96: /* mapping/unmapping */
! 97: s3c2xx0_bs_map,
! 98: s3c2xx0_bs_unmap,
! 99: s3c2xx0_bs_subregion,
! 100:
! 101: /* allocation/deallocation */
! 102: s3c2xx0_bs_alloc, /* not implemented */
! 103: s3c2xx0_bs_free, /* not implemented */
! 104:
! 105: /* get kernel virtual address */
! 106: s3c2xx0_bs_vaddr,
! 107:
! 108: /* mmap */
! 109: bs_notimpl_bs_mmap,
! 110:
! 111: /* barrier */
! 112: s3c2xx0_bs_barrier,
! 113:
! 114: /* read (single) */
! 115: generic_bs_r_1,
! 116: generic_armv4_bs_r_2,
! 117: generic_bs_r_4,
! 118: bs_notimpl_bs_r_8,
! 119:
! 120: /* read multiple */
! 121: generic_bs_rm_1,
! 122: generic_armv4_bs_rm_2,
! 123: generic_bs_rm_4,
! 124: bs_notimpl_bs_rm_8,
! 125:
! 126: /* read region */
! 127: generic_bs_rr_1,
! 128: generic_armv4_bs_rr_2,
! 129: generic_bs_rr_4,
! 130: bs_notimpl_bs_rr_8,
! 131:
! 132: /* write (single) */
! 133: generic_bs_w_1,
! 134: generic_armv4_bs_w_2,
! 135: generic_bs_w_4,
! 136: bs_notimpl_bs_w_8,
! 137:
! 138: /* write multiple */
! 139: generic_bs_wm_1,
! 140: generic_armv4_bs_wm_2,
! 141: generic_bs_wm_4,
! 142: bs_notimpl_bs_wm_8,
! 143:
! 144: /* write region */
! 145: generic_bs_wr_1,
! 146: generic_armv4_bs_wr_2,
! 147: generic_bs_wr_4,
! 148: bs_notimpl_bs_wr_8,
! 149:
! 150: /* set multiple */
! 151: bs_notimpl_bs_sm_1,
! 152: bs_notimpl_bs_sm_2,
! 153: bs_notimpl_bs_sm_4,
! 154: bs_notimpl_bs_sm_8,
! 155:
! 156: /* set region */
! 157: generic_bs_sr_1,
! 158: generic_armv4_bs_sr_2,
! 159: bs_notimpl_bs_sr_4,
! 160: bs_notimpl_bs_sr_8,
! 161:
! 162: /* copy */
! 163: bs_notimpl_bs_c_1,
! 164: generic_armv4_bs_c_2,
! 165: bs_notimpl_bs_c_4,
! 166: bs_notimpl_bs_c_8,
! 167: };
! 168:
! 169: int
! 170: s3c2xx0_bs_map(void *t, bus_addr_t bpa, bus_size_t size,
! 171: int flag, bus_space_handle_t * bshp)
! 172: {
! 173: u_long startpa, endpa, pa;
! 174: vaddr_t va;
! 175: pt_entry_t *pte;
! 176: const struct pmap_devmap *pd;
! 177:
! 178: if ((pd = pmap_devmap_find_pa(bpa, size)) != NULL) {
! 179: /* Device was statically mapped. */
! 180: *bshp = pd->pd_va + (bpa - pd->pd_pa);
! 181: return 0;
! 182: }
! 183: startpa = trunc_page(bpa);
! 184: endpa = round_page(bpa + size);
! 185:
! 186: /* XXX use extent manager to check duplicate mapping */
! 187:
! 188: va = uvm_km_alloc(kernel_map, endpa - startpa, 0,
! 189: UVM_KMF_VAONLY | UVM_KMF_NOWAIT);
! 190: if (!va)
! 191: return (ENOMEM);
! 192:
! 193: *bshp = (bus_space_handle_t) (va + (bpa - startpa));
! 194:
! 195: for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) {
! 196: pmap_kenter_pa(va, pa, VM_PROT_READ | VM_PROT_WRITE);
! 197: pte = vtopte(va);
! 198: if ((flag & BUS_SPACE_MAP_CACHEABLE) == 0)
! 199: *pte &= ~L2_S_CACHE_MASK;
! 200: }
! 201: pmap_update(pmap_kernel());
! 202:
! 203: return (0);
! 204: }
! 205:
! 206: void
! 207: s3c2xx0_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size)
! 208: {
! 209: vaddr_t va;
! 210: vaddr_t endva;
! 211:
! 212: if (pmap_devmap_find_va(bsh, size) != NULL) {
! 213: /* Device was statically mapped; nothing to do. */
! 214: return;
! 215: }
! 216:
! 217: endva = round_page(bsh + size);
! 218: va = trunc_page(bsh);
! 219:
! 220: pmap_kremove(va, endva - va);
! 221: pmap_update(pmap_kernel());
! 222: uvm_km_free(kernel_map, va, endva - va, UVM_KMF_VAONLY);
! 223: }
! 224:
! 225:
! 226: int
! 227: s3c2xx0_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset,
! 228: bus_size_t size, bus_space_handle_t * nbshp)
! 229: {
! 230:
! 231: *nbshp = bsh + offset;
! 232: return (0);
! 233: }
! 234:
! 235: void
! 236: s3c2xx0_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset,
! 237: bus_size_t len, int flags)
! 238: {
! 239:
! 240: /* Nothing to do. */
! 241: }
! 242:
! 243: void *
! 244: s3c2xx0_bs_vaddr(void *t, bus_space_handle_t bsh)
! 245: {
! 246:
! 247: return ((void *) bsh);
! 248: }
! 249:
! 250:
! 251: int
! 252: s3c2xx0_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend,
! 253: bus_size_t size, bus_size_t alignment, bus_size_t boundary,
! 254: int flags, bus_addr_t * bpap, bus_space_handle_t * bshp)
! 255: {
! 256:
! 257: panic("s3c2xx0_io_bs_alloc(): not implemented\n");
! 258: }
! 259:
! 260: void
! 261: s3c2xx0_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size)
! 262: {
! 263:
! 264: panic("s3c2xx0_io_bs_free(): not implemented\n");
! 265: }
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