Now really add the bus_space_generic.c file...

Reviewed by:	sam
Approved by:	cognet (mentor)

sys/arm/arm/bus_space_generic.c

@@ -0,0 +1,146 @@
+/*	$NetBSD: obio_space.c,v 1.6 2003/07/15 00:25:05 lukem Exp $	*/
+
+/*-
+ * Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc.
+ * All rights reserved.
+ *
+ * Written by Jason R. Thorpe for Wasabi Systems, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed for the NetBSD Project by
+ *	Wasabi Systems, Inc.
+ * 4. The name of Wasabi Systems, Inc. may not be used to endorse
+ *    or promote products derived from this software without specific prior
+ *    written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/kernel.h>
+#include <sys/malloc.h>
+
+#include <vm/vm.h>
+#include <vm/pmap.h>
+#include <vm/vm_kern.h>
+#include <vm/vm_extern.h>
+
+#include <machine/bus.h>
+
+/* Prototypes for all the bus_space structure functions */
+bs_protos(generic);
+
+int
+generic_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flags,
+    bus_space_handle_t *bshp)
+{
+	const struct pmap_devmap *pd;
+	vm_paddr_t startpa, endpa, pa, offset;
+	vm_offset_t va;
+	pt_entry_t *pte;
+
+	if ((pd = pmap_devmap_find_pa(bpa, size)) != NULL) {
+		/* Device was statically mapped. */
+		*bshp = pd->pd_va + (bpa - pd->pd_pa);
+		return (0);
+	}
+
+	endpa = round_page(bpa + size);
+	offset = bpa & PAGE_MASK;
+	startpa = trunc_page(bpa);
+
+	va = kmem_alloc(kernel_map, endpa - startpa);
+	if (va == 0)
+		return (ENOMEM);
+
+	*bshp = va + offset;
+
+	for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) {
+		pmap_kenter(va, pa);
+		pte = vtopte(va);
+		if (!(flags & BUS_SPACE_MAP_CACHEABLE)) {
+			*pte &= ~L2_S_CACHE_MASK;
+			PTE_SYNC(pte);
+		}
+	}
+
+	return (0);
+}
+
+int
+generic_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend, bus_size_t size,
+    bus_size_t alignment, bus_size_t boundary, int flags, bus_addr_t *bpap,
+    bus_space_handle_t *bshp)
+{
+
+	panic("generic_bs_alloc(): not implemented");
+}
+
+
+void
+generic_bs_unmap(void *t, bus_space_handle_t h, bus_size_t size)
+{
+	vm_offset_t va, endva;
+
+	if (pmap_devmap_find_va((vm_offset_t)t, size) != NULL) {
+		/* Device was statically mapped; nothing to do. */
+		return;
+	}
+
+	endva = round_page((vm_offset_t)t + size);
+	va = trunc_page((vm_offset_t)t);
+
+	while (va < endva) {
+		pmap_kremove(va);
+		va += PAGE_SIZE;
+	}
+	kmem_free(kernel_map, va, endva - va);
+}
+
+void
+generic_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size)
+{
+
+	panic("generic_bs_free(): not implemented");
+}
+
+int
+generic_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset,
+    bus_size_t size, bus_space_handle_t *nbshp)
+{
+
+	*nbshp = bsh + offset;
+	return (0);
+}
+
+void
+generic_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset,
+    bus_size_t len, int flags)
+{
+
+	/* Nothing to do. */
+}