Annotation of sys/arch/arm/xscale/pxa2x0_space.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: pxa2x0_space.c,v 1.3 2005/07/18 02:43:24 fgsch Exp $ */
! 2: /* $NetBSD: pxa2x0_space.c,v 1.5 2004/06/07 19:45:22 nathanw Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 2001, 2002 Wasabi Systems, Inc.
! 6: * All rights reserved.
! 7: *
! 8: * Written by Jason R. Thorpe for Wasabi Systems, Inc.
! 9: *
! 10: * Redistribution and use in source and binary forms, with or without
! 11: * modification, are permitted provided that the following conditions
! 12: * are met:
! 13: * 1. Redistributions of source code must retain the above copyright
! 14: * notice, this list of conditions and the following disclaimer.
! 15: * 2. Redistributions in binary form must reproduce the above copyright
! 16: * notice, this list of conditions and the following disclaimer in the
! 17: * documentation and/or other materials provided with the distribution.
! 18: * 3. All advertising materials mentioning features or use of this software
! 19: * must display the following acknowledgement:
! 20: * This product includes software developed for the NetBSD Project by
! 21: * Wasabi Systems, Inc.
! 22: * 4. The name of Wasabi Systems, Inc. may not be used to endorse
! 23: * or promote products derived from this software without specific prior
! 24: * written permission.
! 25: *
! 26: * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
! 27: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
! 28: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
! 29: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
! 30: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
! 31: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
! 32: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! 33: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! 34: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! 35: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! 36: * POSSIBILITY OF SUCH DAMAGE.
! 37: */
! 38: /*
! 39: * Copyright (c) 1997 Mark Brinicombe.
! 40: * Copyright (c) 1997 Causality Limited.
! 41: * All rights reserved.
! 42: *
! 43: * This code is derived from software contributed to The NetBSD Foundation
! 44: * by Ichiro FUKUHARA.
! 45: *
! 46: * Redistribution and use in source and binary forms, with or without
! 47: * modification, are permitted provided that the following conditions
! 48: * are met:
! 49: * 1. Redistributions of source code must retain the above copyright
! 50: * notice, this list of conditions and the following disclaimer.
! 51: * 2. Redistributions in binary form must reproduce the above copyright
! 52: * notice, this list of conditions and the following disclaimer in the
! 53: * documentation and/or other materials provided with the distribution.
! 54: * 3. All advertising materials mentioning features or use of this software
! 55: * must display the following acknowledgement:
! 56: * This product includes software developed by Mark Brinicombe.
! 57: * 4. The name of the company nor the name of the author may be used to
! 58: * endorse or promote products derived from this software without specific
! 59: * prior written permission.
! 60: *
! 61: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
! 62: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
! 63: * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 64: * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
! 65: * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
! 66: * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
! 67: * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 68: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 69: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 70: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 71: * SUCH DAMAGE.
! 72: */
! 73:
! 74: /*
! 75: * bus_space functions for Intel PXA2[51]0 application processor.
! 76: * Derived from i80321_space.c.
! 77: */
! 78:
! 79: #include <sys/cdefs.h>
! 80: /*
! 81: __KERNEL_RCSID(0, "$NetBSD: pxa2x0_space.c,v 1.5 2004/06/07 19:45:22 nathanw Exp $");
! 82: */
! 83:
! 84: #include <sys/param.h>
! 85: #include <sys/systm.h>
! 86:
! 87: #include <uvm/uvm_extern.h>
! 88:
! 89: #include <machine/bus.h>
! 90:
! 91: /* Prototypes for all the bus_space structure functions */
! 92: bs_protos(pxa2x0);
! 93: bs_protos(generic);
! 94: bs_protos(generic_armv4);
! 95: bs_protos(bs_notimpl);
! 96:
! 97: struct bus_space pxa2x0_bs_tag = {
! 98: /* cookie */
! 99: (void *) 0,
! 100:
! 101: /* mapping/unmapping */
! 102: pxa2x0_bs_map,
! 103: pxa2x0_bs_unmap,
! 104: pxa2x0_bs_subregion,
! 105:
! 106: /* allocation/deallocation */
! 107: pxa2x0_bs_alloc, /* not implemented */
! 108: pxa2x0_bs_free, /* not implemented */
! 109:
! 110: /* get kernel virtual address */
! 111: pxa2x0_bs_vaddr,
! 112:
! 113: /* mmap */
! 114: bs_notimpl_bs_mmap,
! 115:
! 116: /* barrier */
! 117: pxa2x0_bs_barrier,
! 118:
! 119: /* read (single) */
! 120: generic_bs_r_1,
! 121: generic_armv4_bs_r_2,
! 122: generic_bs_r_4,
! 123: bs_notimpl_bs_r_8,
! 124:
! 125: /* read multiple */
! 126: generic_bs_rm_1,
! 127: generic_armv4_bs_rm_2,
! 128: generic_bs_rm_4,
! 129: bs_notimpl_bs_rm_8,
! 130:
! 131: /* read region */
! 132: generic_bs_rr_1,
! 133: generic_armv4_bs_rr_2,
! 134: generic_bs_rr_4,
! 135: bs_notimpl_bs_rr_8,
! 136:
! 137: /* write (single) */
! 138: generic_bs_w_1,
! 139: generic_armv4_bs_w_2,
! 140: generic_bs_w_4,
! 141: bs_notimpl_bs_w_8,
! 142:
! 143: /* write multiple */
! 144: generic_bs_wm_1,
! 145: generic_armv4_bs_wm_2,
! 146: generic_bs_wm_4,
! 147: bs_notimpl_bs_wm_8,
! 148:
! 149: /* write region */
! 150: generic_bs_wr_1,
! 151: generic_armv4_bs_wr_2,
! 152: generic_bs_wr_4,
! 153: bs_notimpl_bs_wr_8,
! 154:
! 155: /* set multiple */
! 156: bs_notimpl_bs_sm_1,
! 157: bs_notimpl_bs_sm_2,
! 158: bs_notimpl_bs_sm_4,
! 159: bs_notimpl_bs_sm_8,
! 160:
! 161: /* set region */
! 162: generic_bs_sr_1,
! 163: generic_armv4_bs_sr_2,
! 164: bs_notimpl_bs_sr_4,
! 165: bs_notimpl_bs_sr_8,
! 166:
! 167: /* copy */
! 168: bs_notimpl_bs_c_1,
! 169: generic_armv4_bs_c_2,
! 170: bs_notimpl_bs_c_4,
! 171: bs_notimpl_bs_c_8,
! 172: };
! 173:
! 174: int
! 175: pxa2x0_bs_map(void *t, bus_addr_t bpa, bus_size_t size,
! 176: int flag, bus_space_handle_t *bshp)
! 177: {
! 178: u_long startpa, endpa, pa;
! 179: vaddr_t va;
! 180: pt_entry_t *pte;
! 181:
! 182: if ((u_long)bpa > (u_long)KERNEL_BASE) {
! 183: /* Some IO registers (ex. UART ports for console)
! 184: are mapped to fixed address by board specific
! 185: routine. */
! 186: *bshp = bpa;
! 187: return(0);
! 188: }
! 189:
! 190: startpa = trunc_page(bpa);
! 191: endpa = round_page(bpa + size);
! 192:
! 193: /* XXX use extent manager to check duplicate mapping */
! 194:
! 195: va = uvm_km_valloc(kernel_map, endpa - startpa);
! 196: if (! va)
! 197: return(ENOMEM);
! 198:
! 199: *bshp = (bus_space_handle_t)(va + (bpa - startpa));
! 200:
! 201: for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) {
! 202: pmap_kenter_pa(va, pa, VM_PROT_READ | VM_PROT_WRITE);
! 203: if ((flag & BUS_SPACE_MAP_CACHEABLE) == 0) {
! 204: pte = vtopte(va);
! 205: *pte &= ~L2_S_CACHE_MASK;
! 206: PTE_SYNC(pte);
! 207: /* XXX: pmap_kenter_pa() also does PTE_SYNC(). a bit of
! 208: * waste.
! 209: */
! 210: }
! 211: }
! 212: pmap_update(pmap_kernel());
! 213:
! 214: return(0);
! 215: }
! 216:
! 217: void
! 218: pxa2x0_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size)
! 219: {
! 220:
! 221: if (bsh > (u_long)KERNEL_BASE)
! 222: return;
! 223:
! 224: uvm_km_free(kernel_map, bsh, size);
! 225: }
! 226:
! 227:
! 228: int
! 229: pxa2x0_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset,
! 230: bus_size_t size, bus_space_handle_t *nbshp)
! 231: {
! 232:
! 233: *nbshp = bsh + offset;
! 234: return (0);
! 235: }
! 236:
! 237: void
! 238: pxa2x0_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset,
! 239: bus_size_t len, int flags)
! 240: {
! 241:
! 242: /* Nothing to do. */
! 243: }
! 244:
! 245: void *
! 246: pxa2x0_bs_vaddr(void *t, bus_space_handle_t bsh)
! 247: {
! 248:
! 249: return ((void *)bsh);
! 250: }
! 251:
! 252:
! 253: int
! 254: pxa2x0_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend,
! 255: bus_size_t size, bus_size_t alignment, bus_size_t boundary, int flags,
! 256: bus_addr_t *bpap, bus_space_handle_t *bshp)
! 257: {
! 258:
! 259: panic("pxa2x0_io_bs_alloc(): not implemented");
! 260: }
! 261:
! 262: void
! 263: pxa2x0_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size)
! 264: {
! 265:
! 266: panic("pxa2x0_io_bs_free(): not implemented");
! 267: }
! 268:
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