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/* $NetBSD: obio_space.c,v 1.9 2005/11/24 13:08:33 yamt 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.
*/
/*
* bus_space functions for IQ80321 on-board devices
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <uvm/uvm_extern.h>
#include <machine/bus.h>
/* Prototypes for all the bus_space structure functions */
bs_protos(obio);
bs_protos(generic);
bs_protos(generic_armv4);
bs_protos(bs_notimpl);
/*
* The obio bus space tag. This is constant for all instances, so
* we never have to explicitly "create" it.
*/
struct bus_space obio_bs_tag = {
/* cookie */
(void *) 0,
/* mapping/unmapping */
obio_bs_map,
obio_bs_unmap,
obio_bs_subregion,
/* allocation/deallocation */
obio_bs_alloc,
obio_bs_free,
/* get kernel virtual address */
obio_bs_vaddr,
/* mmap */
bs_notimpl_bs_mmap,
/* barrier */
obio_bs_barrier,
/* read (single) */
generic_bs_r_1,
generic_armv4_bs_r_2,
generic_bs_r_4,
bs_notimpl_bs_r_8,
/* read multiple */
generic_bs_rm_1,
generic_armv4_bs_rm_2,
bs_notimpl_bs_rm_4,
bs_notimpl_bs_rm_8,
/* read region */
generic_bs_rr_1,
bs_notimpl_bs_rr_2,
bs_notimpl_bs_rr_4,
bs_notimpl_bs_rr_8,
/* write (single) */
generic_bs_w_1,
generic_armv4_bs_w_2,
generic_bs_w_4,
bs_notimpl_bs_w_8,
/* write multiple */
generic_bs_wm_1,
generic_armv4_bs_wm_2,
bs_notimpl_bs_wm_4,
bs_notimpl_bs_wm_8,
/* write region */
bs_notimpl_bs_wr_1,
bs_notimpl_bs_wr_2,
bs_notimpl_bs_wr_4,
bs_notimpl_bs_wr_8,
/* set multiple */
bs_notimpl_bs_sm_1,
bs_notimpl_bs_sm_2,
bs_notimpl_bs_sm_4,
bs_notimpl_bs_sm_8,
/* set region */
bs_notimpl_bs_sr_1,
bs_notimpl_bs_sr_2,
bs_notimpl_bs_sr_4,
bs_notimpl_bs_sr_8,
/* copy */
bs_notimpl_bs_c_1,
bs_notimpl_bs_c_2,
bs_notimpl_bs_c_4,
bs_notimpl_bs_c_8,
};
int
obio_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flag,
bus_space_handle_t *bshp)
{
const struct pmap_devmap *pd;
paddr_t startpa, endpa, pa;
vaddr_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);
startpa = trunc_page(bpa);
va = uvm_km_valloc(kernel_map, endpa - startpa);
if (va == 0)
return(ENOMEM);
*bshp = (bus_space_handle_t)(va + (bpa - startpa));
for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) {
pmap_kenter_pa(va, pa, VM_PROT_READ | VM_PROT_WRITE);
if ((flag & BUS_SPACE_MAP_CACHEABLE) == 0) {
pte = vtopte(va);
*pte &= ~L2_S_CACHE_MASK;
PTE_SYNC(pte);
}
}
pmap_update(pmap_kernel());
return (0);
}
int
obio_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("obio_bs_alloc(): not implemented");
}
void
obio_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size)
{
vaddr_t va, endva;
if (pmap_devmap_find_va(bsh, size) != NULL) {
/* Device was statically mapped; nothing to do. */
return;
}
endva = round_page(bsh + size);
va = trunc_page(bsh);
pmap_kremove(va, endva - va);
uvm_km_free(kernel_map, va, endva - va);
}
void
obio_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size)
{
panic("obio_bs_free(): not implemented");
}
int
obio_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 *
obio_bs_vaddr(void *t, bus_space_handle_t bsh)
{
return ((void *)bsh);
}
void
obio_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset,
bus_size_t len, int flags)
{
/* Nothing to do. */
}
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