 @@ -1,1409 +1,1424 @@
-/*	$NetBSD: mainbus.c,v 1.57 2009/12/02 13:45:13 skrll Exp $	*/
+/*	$NetBSD: mainbus.c,v 1.58 2009/12/02 13:49:32 skrll Exp $	*/
 /*-
  * Copyright (c) 2001, 2002 The NetBSD Foundation, Inc.
  * All rights reserved.
+ *
  * This code is derived from software contributed to The NetBSD Foundation
  * by Matthew Fredette.
+ *
  * 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.
+ *
  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  * ``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 THE FOUNDATION OR CONTRIBUTORS
  * 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.
  */
 /*	$OpenBSD: mainbus.c,v 1.13 2001/09/19 20:50:56 mickey Exp $	*/
 /*
  * Copyright (c) 1998-2004 Michael Shalayeff
  * All rights reserved.
+ *
  * 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.
+ *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR OR HIS RELATIVES 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 MIND, 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>
-__KERNEL_RCSID(0, "$NetBSD: mainbus.c,v 1.57 2009/12/02 13:45:13 skrll Exp $");
+__KERNEL_RCSID(0, "$NetBSD: mainbus.c,v 1.58 2009/12/02 13:49:32 skrll Exp $");
 #include "locators.h"
 #include "power.h"
 #include <sys/param.h>
 #include <sys/systm.h>
 #include <sys/device.h>
 #include <sys/reboot.h>
 #include <sys/extent.h>
 #include <sys/mbuf.h>
 #include <uvm/uvm_page.h>
 #include <uvm/uvm.h>
 #include <machine/pdc.h>
 #include <machine/iomod.h>
 #include <machine/autoconf.h>
 #include <hp700/hp700/machdep.h>
 #include <hp700/hp700/intr.h>
 #include <hp700/dev/cpudevs.h>
 static struct pdc_hpa pdc_hpa PDC_ALIGNMENT;
 #ifdef MBUSDEBUG
 #define	DPRINTF(s)	do {	\
 	if (mbusdebug)		\
 		printf s;	\
 } while(0)
 int mbusdebug = 1;
 #else
 #define	DPRINTF(s)	/* */
 #endif
 struct mainbus_softc {
 	device_t sc_dv;
 	hppa_hpa_t sc_hpa;
 };
 int	mbmatch(device_t, cfdata_t, void *);
 void	mbattach(device_t, device_t, void *);
 CFATTACH_DECL_NEW(mainbus, sizeof(struct mainbus_softc),
     mbmatch, mbattach, NULL, NULL);
 extern struct cfdriver mainbus_cd;
 static int mb_attached;
 /* from machdep.c */
 extern struct extent *hp700_io_extent;
 extern struct extent *dma24_ex;
 u_int8_t mbus_r1(void *, bus_space_handle_t, bus_size_t);
 u_int16_t mbus_r2(void *, bus_space_handle_t, bus_size_t);
 u_int32_t mbus_r4(void *, bus_space_handle_t, bus_size_t);
 u_int64_t mbus_r8(void *, bus_space_handle_t, bus_size_t);
 void mbus_w1(void *, bus_space_handle_t, bus_size_t, u_int8_t);
 void mbus_w2(void *, bus_space_handle_t, bus_size_t, u_int16_t);
 void mbus_w4(void *, bus_space_handle_t, bus_size_t, u_int32_t);
 void mbus_w8(void *, bus_space_handle_t, bus_size_t, u_int64_t);
 void mbus_rm_1(void *, bus_space_handle_t, bus_size_t, u_int8_t *, bus_size_t);
 void mbus_rm_2(void *, bus_space_handle_t, bus_size_t, u_int16_t *, bus_size_t);
 void mbus_rm_4(void *, bus_space_handle_t, bus_size_t, u_int32_t *, bus_size_t);
 void mbus_rm_8(void *, bus_space_handle_t, bus_size_t, u_int64_t *, bus_size_t);
 void mbus_wm_1(void *, bus_space_handle_t, bus_size_t, const u_int8_t *, bus_size_t);
 void mbus_wm_2(void *, bus_space_handle_t, bus_size_t, const u_int16_t *, bus_size_t);
 void mbus_wm_4(void *, bus_space_handle_t, bus_size_t, const u_int32_t *, bus_size_t);
 void mbus_wm_8(void *, bus_space_handle_t, bus_size_t, const u_int64_t *, bus_size_t);
 void mbus_rr_1(void *, bus_space_handle_t, bus_size_t, u_int8_t *, bus_size_t);
 void mbus_rr_2(void *, bus_space_handle_t, bus_size_t, u_int16_t *, bus_size_t);
 void mbus_rr_4(void *, bus_space_handle_t, bus_size_t, u_int32_t *, bus_size_t);
 void mbus_rr_8(void *, bus_space_handle_t, bus_size_t, u_int64_t *, bus_size_t);
 void mbus_wr_1(void *, bus_space_handle_t, bus_size_t, const u_int8_t *, bus_size_t);
 void mbus_wr_2(void *, bus_space_handle_t, bus_size_t, const u_int16_t *, bus_size_t);
 void mbus_wr_4(void *, bus_space_handle_t, bus_size_t, const u_int32_t *, bus_size_t);
 void mbus_wr_8(void *, bus_space_handle_t, bus_size_t, const u_int64_t *, bus_size_t);
 void mbus_sm_1(void *, bus_space_handle_t, bus_size_t, u_int8_t, bus_size_t);
 void mbus_sm_2(void *, bus_space_handle_t, bus_size_t, u_int16_t, bus_size_t);
 void mbus_sm_4(void *, bus_space_handle_t, bus_size_t, u_int32_t, bus_size_t);
 void mbus_sm_8(void *, bus_space_handle_t, bus_size_t, u_int64_t, bus_size_t);
 void mbus_sr_1(void *, bus_space_handle_t, bus_size_t, u_int8_t, bus_size_t);
 void mbus_sr_2(void *, bus_space_handle_t, bus_size_t, u_int16_t, bus_size_t);
 void mbus_sr_4(void *, bus_space_handle_t, bus_size_t, u_int32_t, bus_size_t);
 void mbus_sr_8(void *, bus_space_handle_t, bus_size_t, u_int64_t, bus_size_t);
 void mbus_cp_1(void *, bus_space_handle_t, bus_size_t, bus_space_handle_t, bus_size_t, bus_size_t);
 void mbus_cp_2(void *, bus_space_handle_t, bus_size_t, bus_space_handle_t, bus_size_t, bus_size_t);
 void mbus_cp_4(void *, bus_space_handle_t, bus_size_t, bus_space_handle_t, bus_size_t, bus_size_t);
 void mbus_cp_8(void *, bus_space_handle_t, bus_size_t, bus_space_handle_t, bus_size_t, bus_size_t);
 int mbus_add_mapping(bus_addr_t, bus_size_t, int, bus_space_handle_t *);
 int mbus_remove_mapping(bus_space_handle_t, bus_size_t, bus_addr_t *);
 int mbus_map(void *, bus_addr_t, bus_size_t, int, bus_space_handle_t *);
 void mbus_unmap(void *, bus_space_handle_t, bus_size_t);
 int mbus_alloc(void *, bus_addr_t, bus_addr_t, bus_size_t, bus_size_t, bus_size_t, int, bus_addr_t *, bus_space_handle_t *);
 void mbus_free(void *, bus_space_handle_t, bus_size_t);
 int mbus_subregion(void *, bus_space_handle_t, bus_size_t, bus_size_t, bus_space_handle_t *);
 void mbus_barrier(void *, bus_space_handle_t, bus_size_t, bus_size_t, int);
 void *mbus_vaddr(void *, bus_space_handle_t);
 paddr_t mbus_mmap(void *, bus_addr_t, off_t, int, int);
 int mbus_dmamap_create(void *, bus_size_t, int, bus_size_t, bus_size_t, int, bus_dmamap_t *);
 void mbus_dmamap_destroy(void *, bus_dmamap_t);
 int mbus_dmamap_load(void *, bus_dmamap_t, void *, bus_size_t, struct proc *, int);
 int mbus_dmamap_load_mbuf(void *, bus_dmamap_t, struct mbuf *, int);
 int mbus_dmamap_load_uio(void *, bus_dmamap_t, struct uio *, int);
 int mbus_dmamap_load_raw(void *, bus_dmamap_t, bus_dma_segment_t *, int, bus_size_t, int);
 void mbus_dmamap_unload(void *, bus_dmamap_t);
 void mbus_dmamap_sync(void *, bus_dmamap_t, bus_addr_t, bus_size_t, int);
 int mbus_dmamem_alloc(void *, bus_size_t, bus_size_t, bus_size_t, bus_dma_segment_t *, int, int *, int);
 void mbus_dmamem_free(void *, bus_dma_segment_t *, int);
 int mbus_dmamem_map(void *, bus_dma_segment_t *, int, size_t, void **, int);
 void mbus_dmamem_unmap(void *, void *, size_t);
 paddr_t mbus_dmamem_mmap(void *, bus_dma_segment_t *, int, off_t, int, int);
 int _bus_dmamap_load_buffer(bus_dma_tag_t t, bus_dmamap_t map, void *buf,
     bus_size_t buflen, struct vmspace *vm, int flags, paddr_t *lastaddrp,
     int *segp, int first);
 int
 mbus_add_mapping(bus_addr_t bpa, bus_size_t size, int flags,
     bus_space_handle_t *bshp)
+{
 	u_int frames;
 #ifdef USE_BTLB
 	vsize_t btlb_size;
 	int error;
 #endif /* USE_BTLB */
 	DPRINTF(("\n%s(%lx,%lx,%scachable,%p)\n", __func__,
 	    bpa, size, flags? "" : "non", bshp));
 	/*
 	 * We must be called with a page-aligned address in
 	 * I/O space, and with a multiple of the page size.
 	 */
 	KASSERT((bpa & PGOFSET) == 0);
 	KASSERT(bpa >= HPPA_IOSPACE);
 	KASSERT((size & PGOFSET) == 0);
 	/*
 	 * Assume that this will succeed.
 	 */
 	*bshp = bpa;
 	/*
 	 * Loop while there is space left to map.
 	 */
 	frames = size >> PGSHIFT;
 	while (frames > 0) {
 		/*
 		 * If this mapping is more than eight pages long,
 		 * try to add a BTLB entry.
 		 */
 #ifdef USE_BTLB
 		if (frames > 8 &&
 		    frames >= hppa_btlb_size_min) {
 			btlb_size = frames;
 			if (btlb_size > hppa_btlb_size_max)
 				btlb_size = hppa_btlb_size_max;
 			btlb_size <<= PGSHIFT;
 			error = hppa_btlb_insert(pmap_kernel()->pmap_space,
 			    bpa, bpa, &btlb_size,
 			    pmap_kernel()->pmap_pid |
 			    pmap_prot(pmap_kernel(), VM_PROT_READ | VM_PROT_WRITE));
 			if (error == 0) {
 				bpa += btlb_size;
 				frames -= (btlb_size >> PGSHIFT);
 				continue;
+			}
 			else if (error != ENOMEM)
 				return error;
+		}
 #endif /* USE_BTLB */
 		/*
 		 * Enter another single-page mapping.
 		 */
 		pmap_kenter_pa(bpa, bpa, VM_PROT_READ | VM_PROT_WRITE, 0);
 		bpa += PAGE_SIZE;
 		frames--;
+	}
 	/* Success. */
 	return 0;
+}
 /*
  * This removes a mapping added by mbus_add_mapping.
  */
 int
 mbus_remove_mapping(bus_space_handle_t bsh, bus_size_t size, bus_addr_t *bpap)
+{
 	bus_addr_t bpa;
 	u_int frames;
 #ifdef USE_BTLB
 	vsize_t btlb_size;
 	int error;
 #endif /* USE_BTLB */
 	/*
 	 * We must be called with a page-aligned address in
 	 * I/O space, and with a multiple of the page size.
 	 */
 	bpa = *bpap = bsh;
 	KASSERT((bpa & PGOFSET) == 0);
 	KASSERT(bpa >= HPPA_IOSPACE);
 	KASSERT((size & PGOFSET) == 0);
 	/*
 	 * Loop while there is space left to unmap.
 	 */
 	frames = size >> PGSHIFT;
 	while (frames > 0) {
 		/*
 		 * If this mapping is more than eight pages long,
 		 * try to remove a BTLB entry.
 		 */
 #ifdef USE_BTLB
 		if (frames > 8 &&
 		    frames >= hppa_btlb_size_min) {
 			btlb_size = frames;
 			if (btlb_size > hppa_btlb_size_max)
 				btlb_size = hppa_btlb_size_max;
 			btlb_size <<= PGSHIFT;
 			error = hppa_btlb_purge(pmap_kernel()->pmap_space,
 						bpa, &btlb_size);
 			if (error == 0) {
 				bpa += btlb_size;
 				frames -= (btlb_size >> PGSHIFT);
 				continue;
+			}
 			else if (error != ENOENT)
 				return error;
+		}
 #endif /* USE_BTLB */
 		/*
 		 * Remove another single-page mapping.
 		 */
 		pmap_kremove(bpa, PAGE_SIZE);
 		bpa += PAGE_SIZE;
 		frames--;
+	}
 	/* Success. */
 	return 0;
+}
 int
 mbus_map(void *v, bus_addr_t bpa, bus_size_t size, int flags,
     bus_space_handle_t *bshp)
+{
 	int error;
 	bus_size_t offset;
 	/*
 	 * We must only be called with addresses in I/O space.
 	 */
 	KASSERT(bpa >= HPPA_IOSPACE);
 	/*
 	 * Page-align the I/O address and size.
 	 */
 	offset = (bpa & PGOFSET);
 	bpa -= offset;
 	size += offset;
 	size = round_page(size);
 	/*
 	 * Allocate the region of I/O space.
 	 */
 	error = extent_alloc_region(hp700_io_extent, bpa, size, EX_NOWAIT);
 	if (error)
 		return (error);
 	/*
 	 * Map the region of I/O space.
 	 */
 	error = mbus_add_mapping(bpa, size, flags, bshp);
 	*bshp |= offset;
 	if (error) {
 		DPRINTF(("bus_space_map: pa 0x%lx, size 0x%lx failed\n",
 		    bpa, size));
 		if (extent_free(hp700_io_extent, bpa, size, EX_NOWAIT)) {
 			printf ("bus_space_map: pa 0x%lx, size 0x%lx\n",
 				bpa, size);
 			printf ("bus_space_map: can't free region\n");
+		}
+	}
 	return error;
+}
 void
 mbus_unmap(void *v, bus_space_handle_t bsh, bus_size_t size)
+{
 	bus_size_t offset;
 	bus_addr_t bpa;
 	int error;
 	/*
 	 * Page-align the bus_space handle and size.
 	 */
 	offset = bsh & PGOFSET;
 	bsh -= offset;
 	size += offset;
 	size = round_page(size);
 	/*
 	 * Unmap the region of I/O space.
 	 */
 	error = mbus_remove_mapping(bsh, size, &bpa);
 	if (error)
 		panic("mbus_unmap: can't unmap region (%d)", error);
 	/*
 	 * Free the region of I/O space.
 	 */
 	error = extent_free(hp700_io_extent, bpa, size, EX_NOWAIT);
 	if (error) {
-		printf("bus_space_unmap: ps 0x%lx, size 0x%lx\n",
+		DPRINTF(("bus_space_unmap: ps 0x%lx, size 0x%lx\n",
-		    bpa, size);
+		    bpa, size));
 		panic("bus_space_unmap: can't free region (%d)", error);
+	}
+}
 int
 mbus_alloc(void *v, bus_addr_t rstart, bus_addr_t rend, bus_size_t size,
     bus_size_t align, bus_size_t boundary, int flags, bus_addr_t *addrp,
     bus_space_handle_t *bshp)
+{
 	bus_addr_t bpa;
 	int error;
 	if (rstart < hp700_io_extent->ex_start ||
 	    rend > hp700_io_extent->ex_end)
 		panic("bus_space_alloc: bad region start/end");
 	/*
 	 * Force the allocated region to be page-aligned.
 	 */
 	if (align < PAGE_SIZE)
 		align = PAGE_SIZE;
 	size = round_page(size);
 	/*
 	 * Allocate the region of I/O space.
 	 */
 	error = extent_alloc_subregion1(hp700_io_extent, rstart, rend, size,
 	    align, 0, boundary, EX_NOWAIT, &bpa);
 	if (error)
 		return (error);
 	/*
 	 * Map the region of I/O space.
 	 */
 	error = mbus_add_mapping(bpa, size, flags, bshp);
 	if (error) {
 		DPRINTF(("bus_space_alloc: pa 0x%lx, size 0x%lx failed\n",
 		    bpa, size));
 		if (extent_free(hp700_io_extent, bpa, size, EX_NOWAIT)) {
 			printf("bus_space_alloc: pa 0x%lx, size 0x%lx\n",
 				bpa, size);
 			printf("bus_space_alloc: can't free region\n");
+		}
+	}
 	*addrp = bpa;
 	return error;
+}
 void
 mbus_free(void *v, bus_space_handle_t h, bus_size_t size)
+{
 	/* bus_space_unmap() does all that we need to do. */
 	mbus_unmap(v, h, size);
+}
 int
 mbus_subregion(void *v, bus_space_handle_t bsh, bus_size_t offset,
     bus_size_t size, bus_space_handle_t *nbshp)
+{
 	*nbshp = bsh + offset;
 	return(0);
+}
 void
 mbus_barrier(void *v, bus_space_handle_t h, bus_size_t o, bus_size_t l, int op)
+{
 	sync_caches();
+}
 void*
 mbus_vaddr(void *v, bus_space_handle_t h)
+{
 	/*
 	 * We must only be called with addresses in I/O space.
 	 */
 	KASSERT(h >= HPPA_IOSPACE);
 	return (void*)h;
+}
 paddr_t
 mbus_mmap(void *v, bus_addr_t addr, off_t off, int prot, int flags)
+{
 	return -1;
+}
 u_int8_t
 mbus_r1(void *v, bus_space_handle_t h, bus_size_t o)
+{
 	return *((volatile u_int8_t *)(h + o));
+}
 u_int16_t
 mbus_r2(void *v, bus_space_handle_t h, bus_size_t o)
+{
 	return *((volatile u_int16_t *)(h + o));
+}
 u_int32_t
 mbus_r4(void *v, bus_space_handle_t h, bus_size_t o)
+{
 	return *((volatile u_int32_t *)(h + o));
+}
 u_int64_t
 mbus_r8(void *v, bus_space_handle_t h, bus_size_t o)
+{
 	return *((volatile u_int64_t *)(h + o));
+}
 void
 mbus_w1(void *v, bus_space_handle_t h, bus_size_t o, u_int8_t vv)
+{
 	*((volatile u_int8_t *)(h + o)) = vv;
+}
 void
 mbus_w2(void *v, bus_space_handle_t h, bus_size_t o, u_int16_t vv)
+{
 	*((volatile u_int16_t *)(h + o)) = vv;
+}
 void
 mbus_w4(void *v, bus_space_handle_t h, bus_size_t o, u_int32_t vv)
+{
 	*((volatile u_int32_t *)(h + o)) = vv;
+}
 void
 mbus_w8(void *v, bus_space_handle_t h, bus_size_t o, u_int64_t vv)
+{
 	*((volatile u_int64_t *)(h + o)) = vv;
+}
 void
 mbus_rm_1(void *v, bus_space_handle_t h, bus_size_t o, u_int8_t *a, bus_size_t c)
+{
 	h += o;
 	while (c--)
 		*(a++) = *(volatile u_int8_t *)h;
+}
 void
 mbus_rm_2(void *v, bus_space_handle_t h, bus_size_t o, u_int16_t *a, bus_size_t c)
+{
 	h += o;
 	while (c--)
 		*(a++) = *(volatile u_int16_t *)h;
+}
 void
 mbus_rm_4(void *v, bus_space_handle_t h, bus_size_t o, u_int32_t *a, bus_size_t c)
+{
 	h += o;
 	while (c--)
 		*(a++) = *(volatile u_int32_t *)h;
+}
 void
 mbus_rm_8(void *v, bus_space_handle_t h, bus_size_t o, u_int64_t *a, bus_size_t c)
+{
 	h += o;
 	while (c--)
 		*(a++) = *(volatile u_int64_t *)h;
+}
 void
 mbus_wm_1(void *v, bus_space_handle_t h, bus_size_t o, const u_int8_t *a, bus_size_t c)
+{
 	h += o;
 	while (c--)
 		*(volatile u_int8_t *)h = *(a++);
+}
 void
 mbus_wm_2(void *v, bus_space_handle_t h, bus_size_t o, const u_int16_t *a, bus_size_t c)
+{
 	h += o;
 	while (c--)
 		*(volatile u_int16_t *)h = *(a++);
+}
 void
 mbus_wm_4(void *v, bus_space_handle_t h, bus_size_t o, const u_int32_t *a, bus_size_t c)
+{
 	h += o;
 	while (c--)
 		*(volatile u_int32_t *)h = *(a++);
+}
 void
 mbus_wm_8(void *v, bus_space_handle_t h, bus_size_t o, const u_int64_t *a, bus_size_t c)
+{
 	h += o;
 	while (c--)
 		*(volatile u_int64_t *)h = *(a++);
+}
 void
 mbus_sm_1(void *v, bus_space_handle_t h, bus_size_t o, u_int8_t vv, bus_size_t c)
+{
 	h += o;
 	while (c--)
 		*(volatile u_int8_t *)h = vv;
+}
 void
 mbus_sm_2(void *v, bus_space_handle_t h, bus_size_t o, u_int16_t vv, bus_size_t c)
+{
 	h += o;
 	while (c--)
 		*(volatile u_int16_t *)h = vv;
+}
 void
 mbus_sm_4(void *v, bus_space_handle_t h, bus_size_t o, u_int32_t vv, bus_size_t c)
+{
 	h += o;
 	while (c--)
 		*(volatile u_int32_t *)h = vv;
+}
 void
 mbus_sm_8(void *v, bus_space_handle_t h, bus_size_t o, u_int64_t vv, bus_size_t c)
+{
 	h += o;
 	while (c--)
 		*(volatile u_int64_t *)h = vv;
+}
 void mbus_rrm_2(void *v, bus_space_handle_t h, bus_size_t o, u_int16_t*a, bus_size_t c);
 void mbus_rrm_4(void *v, bus_space_handle_t h, bus_size_t o, u_int32_t*a, bus_size_t c);
 void mbus_rrm_8(void *v, bus_space_handle_t h, bus_size_t o, u_int64_t*a, bus_size_t c);
 void mbus_wrm_2(void *v, bus_space_handle_t h, bus_size_t o, const u_int16_t *a, bus_size_t c);
 void mbus_wrm_4(void *v, bus_space_handle_t h, bus_size_t o, const u_int32_t *a, bus_size_t c);
 void mbus_wrm_8(void *v, bus_space_handle_t h, bus_size_t o, const u_int64_t *a, bus_size_t c);
 void
 mbus_rr_1(void *v, bus_space_handle_t h, bus_size_t o, u_int8_t *a, bus_size_t c)
+{
 	volatile u_int8_t *p;
 	h += o;
 	p = (void *)h;
 	while (c--)
 		*a++ = *p++;
+}
 void
 mbus_rr_2(void *v, bus_space_handle_t h, bus_size_t o, u_int16_t *a, bus_size_t c)
+{
 	volatile u_int16_t *p;
 	h += o;
 	p = (void *)h;
 	while (c--)
 		*a++ = *p++;
+}
 void
 mbus_rr_4(void *v, bus_space_handle_t h, bus_size_t o, u_int32_t *a, bus_size_t c)
+{
 	volatile u_int32_t *p;
 	h += o;
 	p = (void *)h;
 	while (c--)
 		*a++ = *p++;
+}
 void
 mbus_rr_8(void *v, bus_space_handle_t h, bus_size_t o, u_int64_t *a, bus_size_t c)
+{
 	volatile u_int64_t *p;
 	h += o;
 	p = (void *)h;
 	while (c--)
 		*a++ = *p++;
+}
 void
 mbus_wr_1(void *v, bus_space_handle_t h, bus_size_t o, const u_int8_t *a, bus_size_t c)
+{
 	volatile u_int8_t *p;
 	h += o;
 	p = (void *)h;
 	while (c--)
 		*p++ = *a++;
+}
 void
 mbus_wr_2(void *v, bus_space_handle_t h, bus_size_t o, const u_int16_t *a, bus_size_t c)
+{
 	volatile u_int16_t *p;
 	h += o;
 	p = (void *)h;
 	while (c--)
 		*p++ = *a++;
+}
 void
 mbus_wr_4(void *v, bus_space_handle_t h, bus_size_t o, const u_int32_t *a, bus_size_t c)
+{
 	volatile u_int32_t *p;
 	h += o;
 	p = (void *)h;
 	while (c--)
 		*p++ = *a++;
+}
 void
 mbus_wr_8(void *v, bus_space_handle_t h, bus_size_t o, const u_int64_t *a, bus_size_t c)
+{
 	volatile u_int64_t *p;
 	h += o;
 	p = (void *)h;
 	while (c--)
 		*p++ = *a++;
+}
 void mbus_rrr_2(void *, bus_space_handle_t, bus_size_t, u_int16_t *, bus_size_t);
 void mbus_rrr_4(void *, bus_space_handle_t, bus_size_t, u_int32_t *, bus_size_t);
 void mbus_rrr_8(void *, bus_space_handle_t, bus_size_t, u_int64_t *, bus_size_t);
 void mbus_wrr_2(void *, bus_space_handle_t, bus_size_t, const u_int16_t *, bus_size_t);
 void mbus_wrr_4(void *, bus_space_handle_t, bus_size_t, const u_int32_t *, bus_size_t);
 void mbus_wrr_8(void *, bus_space_handle_t, bus_size_t, const u_int64_t *, bus_size_t);
 void
 mbus_sr_1(void *v, bus_space_handle_t h, bus_size_t o, u_int8_t vv, bus_size_t c)
+{
 	volatile u_int8_t *p;
 	h += o;
 	p = (void *)h;
 	while (c--)
 		*p++ = vv;
+}
 void
 mbus_sr_2(void *v, bus_space_handle_t h, bus_size_t o, u_int16_t vv, bus_size_t c)
+{
 	volatile u_int16_t *p;
 	h += o;
 	p = (void *)h;
 	while (c--)
 		*p++ = vv;
+}
 void
 mbus_sr_4(void *v, bus_space_handle_t h, bus_size_t o, u_int32_t vv, bus_size_t c)
+{
 	volatile u_int32_t *p;
 	h += o;
 	p = (void *)h;
 	while (c--)
 		*p++ = vv;
+}
 void
 mbus_sr_8(void *v, bus_space_handle_t h, bus_size_t o, u_int64_t vv, bus_size_t c)
+{
 	volatile u_int64_t *p;
 	h += o;
 	p = (void *)h;
 	while (c--)
 		*p++ = vv;
+}
 void
 mbus_cp_1(void *v, bus_space_handle_t h1, bus_size_t o1,
 	  bus_space_handle_t h2, bus_size_t o2, bus_size_t c)
+{
 	volatile u_int8_t *p1, *p2;
 	h1 += o1;
 	h2 += o2;
 	p1 = (void *)h1;
 	p2 = (void *)h2;
 	while (c--)
 		*p1++ = *p2++;
+}
 void
 mbus_cp_2(void *v, bus_space_handle_t h1, bus_size_t o1,
 	  bus_space_handle_t h2, bus_size_t o2, bus_size_t c)
+{
 	volatile u_int16_t *p1, *p2;
 	h1 += o1;
 	h2 += o2;
 	p1 = (void *)h1;
 	p2 = (void *)h2;
 	while (c--)
 		*p1++ = *p2++;
+}
 void
 mbus_cp_4(void *v, bus_space_handle_t h1, bus_size_t o1,
 	  bus_space_handle_t h2, bus_size_t o2, bus_size_t c)
+{
 	volatile u_int32_t *p1, *p2;
 	h1 += o1;
 	h2 += o2;
 	p1 = (void *)h1;
 	p2 = (void *)h2;
 	while (c--)
 		*p1++ = *p2++;
+}
 void
 mbus_cp_8(void *v, bus_space_handle_t h1, bus_size_t o1,
 	  bus_space_handle_t h2, bus_size_t o2, bus_size_t c)
+{
 	volatile u_int64_t *p1, *p2;
 	h1 += o1;
 	h2 += o2;
 	p1 = (void *)h1;
 	p2 = (void *)h2;
 	while (c--)
 		*p1++ = *p2++;
+}
 const struct hppa_bus_space_tag hppa_bustag = {
 	NULL,
 	mbus_map, mbus_unmap, mbus_subregion, mbus_alloc, mbus_free,
 	mbus_barrier, mbus_vaddr, mbus_mmap,
 	mbus_r1,    mbus_r2,   mbus_r4,   mbus_r8,
 	mbus_w1,    mbus_w2,   mbus_w4,   mbus_w8,
 	mbus_rm_1,  mbus_rm_2, mbus_rm_4, mbus_rm_8,
 	mbus_wm_1,  mbus_wm_2, mbus_wm_4, mbus_wm_8,
 	mbus_sm_1,  mbus_sm_2, mbus_sm_4, mbus_sm_8,
 	/* *_stream_* are the same as non-stream for native busses */
 		    mbus_rm_2, mbus_rm_4, mbus_rm_8,
 		    mbus_wm_2, mbus_wm_4, mbus_wm_8,
 	mbus_rr_1,  mbus_rr_2, mbus_rr_4, mbus_rr_8,
 	mbus_wr_1,  mbus_wr_2, mbus_wr_4, mbus_wr_8,
 	/* *_stream_* are the same as non-stream for native busses */
 		    mbus_rr_2, mbus_rr_4, mbus_rr_8,
 		    mbus_wr_2, mbus_wr_4, mbus_wr_8,
 	mbus_sr_1,  mbus_sr_2, mbus_sr_4, mbus_sr_8,
 	mbus_cp_1,  mbus_cp_2, mbus_cp_4, mbus_cp_8
 };
 /*
  * Common function for DMA map creation.  May be called by bus-specific
  * DMA map creation functions.
  */
 int
 mbus_dmamap_create(void *v, bus_size_t size, int nsegments, bus_size_t maxsegsz,
     bus_size_t boundary, int flags, bus_dmamap_t *dmamp)
+{
 	struct hppa_bus_dmamap *map;
 	size_t mapsize;
 	/*
 	 * Allocate and initialize the DMA map.  The end of the map
 	 * is a variable-sized array of segments, so we allocate enough
 	 * room for them in one shot.
+	 *
 	 * Note we don't preserve the WAITOK or NOWAIT flags.  Preservation
 	 * of ALLOCNOW notifies others that we've reserved these resources,
 	 * and they are not to be freed.
+	 *
 	 * The bus_dmamap_t includes one bus_dma_segment_t, hence
 	 * the (nsegments - 1).
 	 */
 	mapsize = sizeof(struct hppa_bus_dmamap) +
 	    (sizeof(bus_dma_segment_t) * (nsegments - 1));
 	map = malloc(mapsize, M_DMAMAP,
 	    (flags & BUS_DMA_NOWAIT) ? M_NOWAIT : M_WAITOK);
 	if (!map)
 		return (ENOMEM);
 	memset(map, 0, mapsize);
 	map->_dm_size = size;
 	map->_dm_segcnt = nsegments;
 	map->_dm_maxsegsz = maxsegsz;
 	map->_dm_boundary = boundary;
 	map->_dm_flags = flags & ~(BUS_DMA_WAITOK|BUS_DMA_NOWAIT);
 	map->dm_mapsize = 0;		/* no valid mappings */
 	map->dm_nsegs = 0;
 	*dmamp = map;
 	return (0);
+}
 /*
  * Common function for DMA map destruction.  May be called by bus-specific
  * DMA map destruction functions.
  */
 void
 mbus_dmamap_destroy(void *v, bus_dmamap_t map)
+{
 	/*
 	 * If the handle contains a valid mapping, unload it.
 	 */
 	if (map->dm_mapsize != 0)
 		mbus_dmamap_unload(v, map);
 	free(map, M_DMAMAP);
+}
 /*
  * load DMA map with a linear buffer.
  */
 int
 mbus_dmamap_load(void *v, bus_dmamap_t map, void *buf, bus_size_t buflen,
     struct proc *p, int flags)
+{
 	vaddr_t lastaddr;
 	int seg, error;
 	struct vmspace *vm;
 	/*
 	 * Make sure that on error condition we return "no valid mappings".
 	 */
 	map->dm_mapsize = 0;
 	map->dm_nsegs = 0;
 	if (buflen > map->_dm_size)
 		return (EINVAL);
 	if (p != NULL) {
 		vm = p->p_vmspace;
 	} else {
 		vm = vmspace_kernel();
+	}
 	seg = 0;
 	error = _bus_dmamap_load_buffer(NULL, map, buf, buflen, vm, flags,
 	    &lastaddr, &seg, 1);
 	if (error == 0) {
 		map->dm_mapsize = buflen;
 		map->dm_nsegs = seg + 1;
+	}
 	return (error);
+}
 /*
  * Like _bus_dmamap_load(), but for mbufs.
  */
 int
 mbus_dmamap_load_mbuf(void *v, bus_dmamap_t map, struct mbuf *m0,
     int flags)
+{
 	vaddr_t lastaddr;
 	int seg, error, first;
 	struct mbuf *m;
 	/*
 	 * Make sure that on error condition we return "no valid mappings."
 	 */
 	map->dm_mapsize = 0;
 	map->dm_nsegs = 0;
 #ifdef DIAGNOSTIC
 	if ((m0->m_flags & M_PKTHDR) == 0)
 		panic("_bus_dmamap_load_mbuf: no packet header");
 #endif	/* DIAGNOSTIC */
 	if (m0->m_pkthdr.len > map->_dm_size)
 		return (EINVAL);
 	first = 1;
 	seg = 0;
 	error = 0;
 	for (m = m0; m != NULL && error == 0; m = m->m_next) {
 		if (m->m_len == 0)
 			continue;
 		error = _bus_dmamap_load_buffer(NULL, map, m->m_data, m->m_len,
 		    vmspace_kernel(), flags, &lastaddr, &seg, first);
 		first = 0;
+	}
 	if (error == 0) {
 		map->dm_mapsize = m0->m_pkthdr.len;
 		map->dm_nsegs = seg + 1;
+	}
 	return (error);
+}
 /*
  * Like _bus_dmamap_load(), but for uios.
  */
 int
 mbus_dmamap_load_uio(void *v, bus_dmamap_t map, struct uio *uio,
     int flags)
+{
 	vaddr_t lastaddr;
 	int seg, i, error, first;
 	bus_size_t minlen, resid;
 	struct iovec *iov;
 	void *addr;
 	/*
 	 * Make sure that on error condition we return "no valid mappings."
 	 */
 	map->dm_mapsize = 0;
 	map->dm_nsegs = 0;
 	resid = uio->uio_resid;
 	iov = uio->uio_iov;
 	first = 1;
 	seg = 0;
 	error = 0;
 	for (i = 0; i < uio->uio_iovcnt && resid != 0 && error == 0; i++) {
 		/*
 		 * Now at the first iovec to load.  Load each iovec
 		 * until we have exhausted the residual count.
 		 */
 		minlen = MIN(resid, iov[i].iov_len);
 		addr = (void *)iov[i].iov_base;
 		error = _bus_dmamap_load_buffer(NULL, map, addr, minlen,
 		    uio->uio_vmspace, flags, &lastaddr, &seg, first);
 		first = 0;
 		resid -= minlen;
+	}
 	if (error == 0) {
 		map->dm_mapsize = uio->uio_resid;
 		map->dm_nsegs = seg + 1;
+	}
 	return (error);
+}
 /*
  * Like bus_dmamap_load(), but for raw memory allocated with
  * bus_dmamem_alloc().
  */
 int
 mbus_dmamap_load_raw(void *v, bus_dmamap_t map, bus_dma_segment_t *segs,
     int nsegs, bus_size_t size, int flags)
+{
 	struct pglist *mlist;
 	struct vm_page *m;
 	paddr_t pa, pa_next;
 	bus_size_t mapsize;
 	bus_size_t pagesz = PAGE_SIZE;
 	int seg;
 	/*
 	 * Make sure that on error condition we return "no valid mappings".
 	 */
 	map->dm_nsegs = 0;
 	map->dm_mapsize = 0;
 	/* Load the allocated pages. */
 	mlist = segs[0]._ds_mlist;
 	pa_next = 0;
 	seg = -1;
 	mapsize = size;
 	for (m = TAILQ_FIRST(mlist); m != NULL; m = TAILQ_NEXT(m,pageq.queue)) {
 		if (size == 0)
 			panic("mbus_dmamem_load_raw: size botch");
 		pa = VM_PAGE_TO_PHYS(m);
 		if (pa != pa_next) {
 			if (++seg >= map->_dm_segcnt)
 				panic("mbus_dmamem_load_raw: nsegs botch");
 			map->dm_segs[seg].ds_addr = pa;
 			map->dm_segs[seg].ds_len = 0;
+		}
 		pa_next = pa + PAGE_SIZE;
 		if (size < pagesz)
 			pagesz = size;
 		map->dm_segs[seg].ds_len += pagesz;
 		size -= pagesz;
+	}
 	/* Make the map truly valid. */
 	map->dm_nsegs = seg + 1;
 	map->dm_mapsize = mapsize;
 	return (0);
+}
 /*
  * unload a DMA map.
  */
 void
 mbus_dmamap_unload(void *v, bus_dmamap_t map)
+{
 	/*
 	 * If this map was loaded with mbus_dmamap_load,
 	 * we don't need to do anything.  If this map was
 	 * loaded with mbus_dmamap_load_raw, we also don't
 	 * need to do anything.
 	 */
 	/* Mark the mappings as invalid. */
 	map->dm_mapsize = 0;
 	map->dm_nsegs = 0;
+}
 void
 mbus_dmamap_sync(void *v, bus_dmamap_t map, bus_addr_t offset, bus_size_t len,
     int ops)
+{
 	int i;
 	/*
 	 * Mixing of PRE and POST operations is not allowed.
 	 */
 	if ((ops & (BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE)) != 0 &&
 	    (ops & (BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE)) != 0)
 		panic("mbus_dmamap_sync: mix PRE and POST");
 #ifdef DIAGNOSTIC
 	if (offset >= map->dm_mapsize)
 		panic("mbus_dmamap_sync: bad offset %lu (map size is %lu)",
 		    offset, map->dm_mapsize);
 	if (len == 0 || (offset + len) > map->dm_mapsize)
 		panic("mbus_dmamap_sync: bad length");
 #endif
 	/*
 	 * For a virtually-indexed write-back cache, we need
 	 * to do the following things:
+	 *
 	 *	PREREAD -- Invalidate the D-cache.  We do this
 	 *	here in case a write-back is required by the back-end.
+	 *
 	 *	PREWRITE -- Write-back the D-cache.  Note that if
 	 *	we are doing a PREREAD|PREWRITE, we can collapse
 	 *	the whole thing into a single Wb-Inv.
+	 *
 	 *	POSTREAD -- Nothing.
+	 *
 	 *	POSTWRITE -- Nothing.
 	 */
 	ops &= (BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE);
 	if (ops == 0)
 		return;
 	for (i = 0; len != 0 && i < map->dm_nsegs; i++) {
 		if (offset >= map->dm_segs[i].ds_len)
 			offset -= map->dm_segs[i].ds_len;
 		else {
 			bus_size_t l = map->dm_segs[i].ds_len - offset;
 			if (l > len)
 				l = len;
 			fdcache(HPPA_SID_KERNEL, map->dm_segs[i]._ds_va +
 			    offset, l);
 			len -= l;
 			offset = 0;
+		}
+	}
  	/* for either operation sync the shit away */
 	__asm __volatile ("sync\n\tsyncdma\n\tsync\n\t"
 	    "nop\n\tnop\n\tnop\n\tnop\n\tnop\n\tnop\n\tnop" ::: "memory");
+}
 /*
  * Common function for DMA-safe memory allocation.  May be called
  * by bus-specific DMA memory allocation functions.
  */
 int
 mbus_dmamem_alloc(void *v, bus_size_t size, bus_size_t alignment,
     bus_size_t boundary, bus_dma_segment_t *segs, int nsegs, int *rsegs,
     int flags)
+{
 	paddr_t low, high;
 	struct pglist *mlist;
 	struct vm_page *m;
 	paddr_t pa, pa_next;
 	int seg;
 	int error;
 	/* Always round the size. */
 	size = round_page(size);
 	/* Decide where we can allocate pages. */
 	low = 0;
 	high = ((flags & BUS_DMA_24BIT) ? (1 << 24) : 0) - 1;
 	if ((mlist = malloc(sizeof(*mlist), M_DEVBUF,
 	    (flags & BUS_DMA_NOWAIT) ? M_NOWAIT : M_WAITOK)) == NULL)
 		return (ENOMEM);
 	/*
 	 * Allocate physical pages from the VM system.
 	 */
 	TAILQ_INIT(mlist);
 	error = uvm_pglistalloc(size, low, high, 0, 0,
 				mlist, nsegs, (flags & BUS_DMA_NOWAIT) == 0);
 	/*
 	 * If the allocation failed, and this is a 24-bit
 	 * device, see if we have space left in the 24-bit
 	 * region.
 	 */
 	if (error == ENOMEM && (flags & BUS_DMA_24BIT) && dma24_ex != NULL) {
 		error = extent_alloc(dma24_ex, size, alignment, 0, 0, &pa);
 		if (!error) {
 			free(mlist, M_DEVBUF);
 			/*
 			 * A _ds_mlist value of NULL is the
 			 * signal to mbus_dmamem_map that no
 			 * real mapping needs to be done, and
 			 * it is the signal to mbus_dmamem_free
 			 * that an extent_free is needed.
 			 */
 			*rsegs = 1;
 			segs[0].ds_addr = 0;
 			segs[0].ds_len = size;
 			segs[0]._ds_va = (vaddr_t)pa;
 			segs[0]._ds_mlist = NULL;
 			return (0);
+		}
+	}
 	/* If we don't have the pages. */
 	if (error) {
 		free(mlist, M_DEVBUF);
 		return (error);
+	}
 	/*
 	 * Since, at least as of revision 1.17 of uvm_pglist.c,
 	 * uvm_pglistalloc ignores its nsegs argument, we need
 	 * to check that the pages returned conform to the
 	 * caller's segment requirements.
 	 */
 	pa_next = 0;
 	seg = -1;
 	for (m = TAILQ_FIRST(mlist); m != NULL; m = TAILQ_NEXT(m,pageq.queue)) {
 		pa = VM_PAGE_TO_PHYS(m);
 		if (pa != pa_next) {
 			if (++seg >= nsegs) {
 				uvm_pglistfree(mlist);
 				free(mlist, M_DEVBUF);
 				return (ENOMEM);
+			}
 			segs[seg].ds_addr = 0;
 			segs[seg].ds_len = 0;
 			segs[seg]._ds_va = 0;
+		}
 		pa_next = pa + PAGE_SIZE;
+	}
 	*rsegs = seg + 1;
 	/*
 	 * Simply keep a pointer around to the linked list, so
 	 * bus_dmamap_free() can return it.
+	 *
 	 * NOBODY SHOULD TOUCH THE pageq.queue FIELDS WHILE THESE PAGES
 	 * ARE IN OUR CUSTODY.
 	 */
 	segs[0]._ds_mlist = mlist;
 	/*
 	 * We now have physical pages, but no kernel virtual addresses
 	 * yet. These may be allocated in bus_dmamap_map.  Hence we
 	 * save any alignment and boundary requirements in this DMA
 	 * segment.
 	 */
 	return (0);
+}
 void
 mbus_dmamem_free(void *v, bus_dma_segment_t *segs, int nsegs)
+{
 	/*
 	 * Return the list of physical pages back to the VM system.
 	 */
 	if (segs[0]._ds_mlist != NULL) {
 		uvm_pglistfree(segs[0]._ds_mlist);
 		free(segs[0]._ds_mlist, M_DEVBUF);
 	} else {
 		extent_free(dma24_ex, segs[0]._ds_va, segs[0].ds_len,
 				EX_NOWAIT);
+	}
+}
 /*
  * Common function for mapping DMA-safe memory.  May be called by
  * bus-specific DMA memory map functions.
  */
 int
 mbus_dmamem_map(void *v, bus_dma_segment_t *segs, int nsegs, size_t size,
     void **kvap, int flags)
+{
 	struct vm_page *pg;
 	struct pglist *pglist;
 	vaddr_t va;
 	paddr_t pa;
 	const uvm_flag_t kmflags =
 	    (flags & BUS_DMA_NOWAIT) != 0 ? UVM_KMF_NOWAIT : 0;
 	size = round_page(size);
 	/* 24-bit memory needs no mapping. */
 	if (segs[0]._ds_mlist == NULL) {
 		if (size > segs[0].ds_len)
 			panic("mbus_dmamem_map: size botch");
 		*kvap = (void *)segs[0]._ds_va;
 		return (0);
+	}
 	/* Get a chunk of kernel virtual space. */
 	va = uvm_km_alloc(kernel_map, size, 0, UVM_KMF_VAONLY | kmflags);
 	if (va == 0)
 		return (ENOMEM);
 	/* Stash that in the first segment. */
 	segs[0]._ds_va = va;
 	*kvap = (void *)va;
 	/* Map the allocated pages into the chunk. */
 	pglist = segs[0]._ds_mlist;
 	TAILQ_FOREACH(pg, pglist, pageq.queue) {
 		KASSERT(size != 0);
 		pa = VM_PAGE_TO_PHYS(pg);
 		pmap_kenter_pa(va, pa, VM_PROT_READ | VM_PROT_WRITE, PMAP_NOCACHE);
 		va += PAGE_SIZE;
 		size -= PAGE_SIZE;
+	}
 	pmap_update();
 	return (0);
+}
 /*
  * Common function for unmapping DMA-safe memory.  May be called by
  * bus-specific DMA memory unmapping functions.
  */
 void
 mbus_dmamem_unmap(void *v, void *kva, size_t size)
+{
 #ifdef DIAGNOSTIC
 	if ((u_long)kva & PAGE_MASK)
 		panic("mbus_dmamem_unmap");
 #endif
 	/*
 	 * XXX fredette - this is gross, but it is needed
 	 * to support the 24-bit DMA address stuff.
 	 */
 	if (dma24_ex != NULL && kva < (void *) (1 << 24))
 		return;
 	size = round_page(size);
 	pmap_kremove((vaddr_t)kva, size);
 	pmap_update(pmap_kernel());
 	uvm_km_free(kernel_map, (vaddr_t)kva, size, UVM_KMF_VAONLY);
+}
 /*
  * Common functin for mmap(2)'ing DMA-safe memory.  May be called by
  * bus-specific DMA mmap(2)'ing functions.
  */
 paddr_t
 mbus_dmamem_mmap(void *v, bus_dma_segment_t *segs, int nsegs,
 	off_t off, int prot, int flags)
+{
 	int i;
 	for (i = 0; i < nsegs; i++) {
 #ifdef DIAGNOSTIC
 		if (off & PGOFSET)
 			panic("_bus_dmamem_mmap: offset unaligned");
 		if (segs[i].ds_addr & PGOFSET)
 			panic("_bus_dmamem_mmap: segment unaligned");
 		if (segs[i].ds_len & PGOFSET)
 			panic("_bus_dmamem_mmap: segment size not multiple"
 			    " of page size");
 #endif	/* DIAGNOSTIC */
 		if (off >= segs[i].ds_len) {
 			off -= segs[i].ds_len;
 			continue;
+		}
 		return (btop((u_long)segs[i].ds_addr + off));
+	}
 	/* Page not found. */
 	return (-1);
+}
 int
 _bus_dmamap_load_buffer(bus_dma_tag_t t, bus_dmamap_t map, void *buf,
     bus_size_t buflen, struct vmspace *vm, int flags, paddr_t *lastaddrp,
     int *segp, int first)
+{
 	bus_size_t sgsize;
 	bus_addr_t curaddr, lastaddr, baddr, bmask;
 	vaddr_t vaddr = (vaddr_t)buf;
 	int seg;
 	pmap_t pmap;
 	pmap = vm_map_pmap(&vm->vm_map);
 	lastaddr = *lastaddrp;
 	bmask  = ~(map->_dm_boundary - 1);
 	for (seg = *segp; buflen > 0; ) {
 		bool ok;
 		/*
 		 * Get the physical address for this segment.
 		 */
 		ok = pmap_extract(pmap, vaddr, &curaddr);
 		KASSERT(ok == true);
 		/*
 		 * Compute the segment size, and adjust counts.
 		 */
 		sgsize = PAGE_SIZE - ((u_long)vaddr & PGOFSET);
 		if (buflen < sgsize)
 			sgsize = buflen;
 		/*
 		 * Make sure we don't cross any boundaries.
 		 */
 		if (map->_dm_boundary > 0) {
 			baddr = (curaddr + map->_dm_boundary) & bmask;
 			if (sgsize > (baddr - curaddr))