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author | raj <raj@FreeBSD.org> | 2008-04-03 18:28:34 +0000 |
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committer | raj <raj@FreeBSD.org> | 2008-04-03 18:28:34 +0000 |
commit | d7131d4a77fa5af4d387a1aba74d8cc4d74bfe3d (patch) | |
tree | 95ac02568454676c7cd9675f1aa3fd9e53a90b3e /sys/arm | |
parent | 87f84373e2c267e31d0ddfeadbc54f86b9c52ad6 (diff) | |
download | FreeBSD-src-d7131d4a77fa5af4d387a1aba74d8cc4d74bfe3d.zip FreeBSD-src-d7131d4a77fa5af4d387a1aba74d8cc4d74bfe3d.tar.gz |
Now really add the bus_space_generic.c file...
Reviewed by: sam
Approved by: cognet (mentor)
Diffstat (limited to 'sys/arm')
-rw-r--r-- | sys/arm/arm/bus_space_generic.c | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/sys/arm/arm/bus_space_generic.c b/sys/arm/arm/bus_space_generic.c new file mode 100644 index 0000000..f8f38ab --- /dev/null +++ b/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. */ +} |