244 lines
6.0 KiB
C
244 lines
6.0 KiB
C
/* $NetBSD: at91_bus_space.c,v 1.2 2008/07/03 01:15:38 matt Exp $ */
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/*
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* Based on ep93xx_space.c
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* Copyright (c) 2007 Embedtronics Oy
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* All rights reserved.
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*
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* Copyright (c) 2004 Jesse Off
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Ichiro FUKUHARA.
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* 4. The name of the company nor the name of the author may be used to
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* endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: at91_bus_space.c,v 1.2 2008/07/03 01:15:38 matt Exp $");
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/*
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* bus_space I/O functions for ep93xx
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/queue.h>
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#include <uvm/uvm.h>
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#include <machine/bus.h>
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#include <arm/at91/at91var.h>
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//#include <arm/ep93xx/ep93xxreg.h>
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//#include <arm/ep93xx/ep93xxvar.h>
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/* Proto types for all the bus_space structure functions */
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bs_protos(at91);
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bs_protos(generic);
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bs_protos(generic_armv4);
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bs_protos(bs_notimpl);
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struct bus_space at91_bs_tag = {
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/* cookie */
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(void *) 0,
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/* mapping/unmapping */
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at91_bs_map,
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at91_bs_unmap,
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at91_bs_subregion,
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/* allocation/deallocation */
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at91_bs_alloc,
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at91_bs_free,
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/* get kernel virtual address */
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at91_bs_vaddr,
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/* mmap bus space for userland */
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at91_bs_mmap,
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/* barrier */
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at91_bs_barrier,
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/* read (single) */
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generic_bs_r_1,
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generic_armv4_bs_r_2,
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generic_bs_r_4,
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bs_notimpl_bs_r_8,
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/* read multiple */
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generic_bs_rm_1,
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generic_armv4_bs_rm_2,
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generic_bs_rm_4,
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bs_notimpl_bs_rm_8,
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/* read region */
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generic_bs_rr_1,
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generic_armv4_bs_rr_2,
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generic_bs_rr_4,
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bs_notimpl_bs_rr_8,
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/* write (single) */
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generic_bs_w_1,
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generic_armv4_bs_w_2,
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generic_bs_w_4,
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bs_notimpl_bs_w_8,
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/* write multiple */
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generic_bs_wm_1,
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generic_armv4_bs_wm_2,
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generic_bs_wm_4,
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bs_notimpl_bs_wm_8,
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/* write region */
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generic_bs_wr_1,
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generic_armv4_bs_wr_2,
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generic_bs_wr_4,
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bs_notimpl_bs_wr_8,
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/* set multiple */
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bs_notimpl_bs_sm_1,
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bs_notimpl_bs_sm_2,
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bs_notimpl_bs_sm_4,
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bs_notimpl_bs_sm_8,
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/* set region */
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bs_notimpl_bs_sr_1,
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generic_armv4_bs_sr_2,
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generic_bs_sr_4,
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bs_notimpl_bs_sr_8,
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/* copy */
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bs_notimpl_bs_c_1,
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generic_armv4_bs_c_2,
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bs_notimpl_bs_c_4,
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bs_notimpl_bs_c_8,
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};
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int
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at91_bs_map(void *t, bus_addr_t bpa, bus_size_t size,
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int cacheable, bus_space_handle_t *bshp)
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{
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const struct pmap_devmap *pd;
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paddr_t startpa;
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paddr_t endpa;
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paddr_t pa;
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paddr_t offset;
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vaddr_t va;
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if ((pd = pmap_devmap_find_pa(bpa, size)) != NULL) {
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/* Device was statically mapped. */
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*bshp = pd->pd_va + (bpa - pd->pd_pa);
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return 0;
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}
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endpa = round_page(bpa + size);
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offset = bpa & PAGE_MASK;
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startpa = trunc_page(bpa);
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/* Get some VM. */
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va = uvm_km_alloc(kernel_map, endpa - startpa, 0,
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UVM_KMF_VAONLY | UVM_KMF_NOWAIT);
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if (va == 0)
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return ENOMEM;
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/* Store the bus space handle */
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*bshp = va + offset;
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/* Now map the pages */
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for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) {
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pmap_enter(pmap_kernel(), va, pa,
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VM_PROT_READ | VM_PROT_WRITE,
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VM_PROT_READ | VM_PROT_WRITE | PMAP_WIRED);
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}
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pmap_update(pmap_kernel());
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return(0);
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}
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void
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at91_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size)
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{
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vaddr_t va;
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vaddr_t endva;
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if (pmap_devmap_find_va(bsh, size) != NULL) {
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/* Device was statically mapped; nothing to do. */
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return;
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}
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endva = round_page(bsh + size);
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va = trunc_page(bsh);
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pmap_remove(pmap_kernel(), va, endva);
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pmap_update(pmap_kernel());
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uvm_km_free(kernel_map, va, endva - va, UVM_KMF_VAONLY);
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}
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int
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at91_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend,
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bus_size_t size, bus_size_t alignment, bus_size_t boundary, int cacheable,
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bus_addr_t *bpap, bus_space_handle_t *bshp)
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{
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panic("at91_bs_alloc(): not implemented\n");
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}
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void
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at91_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size)
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{
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panic("at91_bs_free(): not implemented\n");
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}
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int
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at91_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset,
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bus_size_t size, bus_space_handle_t *nbshp)
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{
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*nbshp = bsh + offset;
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return (0);
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}
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void *
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at91_bs_vaddr(void *t, bus_space_handle_t bsh)
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{
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return ((void *)bsh);
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}
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paddr_t
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at91_bs_mmap(void *t, bus_addr_t addr, off_t off, int prot, int flags)
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{
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/* Not supported. */
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return (-1);
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}
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void
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at91_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset,
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bus_size_t len, int flags)
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{
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/* NULL */
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}
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/* End of at91_io.c */
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