NetBSD-5.0.2/sys/arch/arm/ep93xx/ep93xx_space.c
/* $NetBSD: ep93xx_space.c,v 1.3 2005/11/24 13:08:32 yamt Exp $ */
/*
* Copyright (c) 2004 Jesse Off
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Ichiro FUKUHARA.
* 4. The name of the company nor the name of the author may be used to
* endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``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 ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD 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>
__KERNEL_RCSID(0, "$NetBSD: ep93xx_space.c,v 1.3 2005/11/24 13:08:32 yamt Exp $");
/*
* bus_space I/O functions for ep93xx
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/queue.h>
#include <uvm/uvm.h>
#include <machine/bus.h>
#include <arm/ep93xx/ep93xxreg.h>
#include <arm/ep93xx/ep93xxvar.h>
/* Proto types for all the bus_space structure functions */
bs_protos(ep93xx);
bs_protos(generic);
bs_protos(generic_armv4);
bs_protos(bs_notimpl);
struct bus_space ep93xx_bs_tag = {
/* cookie */
(void *) 0,
/* mapping/unmapping */
ep93xx_bs_map,
ep93xx_bs_unmap,
ep93xx_bs_subregion,
/* allocation/deallocation */
ep93xx_bs_alloc,
ep93xx_bs_free,
/* get kernel virtual address */
ep93xx_bs_vaddr,
/* mmap bus space for userland */
ep93xx_bs_mmap,
/* barrier */
ep93xx_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,
generic_bs_rm_4,
bs_notimpl_bs_rm_8,
/* read region */
generic_bs_rr_1,
generic_armv4_bs_rr_2,
generic_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,
generic_bs_wm_4,
bs_notimpl_bs_wm_8,
/* write region */
generic_bs_wr_1,
generic_armv4_bs_wr_2,
generic_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,
generic_armv4_bs_sr_2,
generic_bs_sr_4,
bs_notimpl_bs_sr_8,
/* copy */
bs_notimpl_bs_c_1,
generic_armv4_bs_c_2,
bs_notimpl_bs_c_4,
bs_notimpl_bs_c_8,
};
int
ep93xx_bs_map(void *t, bus_addr_t bpa, bus_size_t size,
int cacheable, bus_space_handle_t *bshp)
{
const struct pmap_devmap *pd;
paddr_t startpa;
paddr_t endpa;
paddr_t pa;
paddr_t offset;
vaddr_t va;
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);
/* Get some VM. */
va = uvm_km_alloc(kernel_map, endpa - startpa, 0,
UVM_KMF_VAONLY | UVM_KMF_NOWAIT);
if (va == 0)
return ENOMEM;
/* Store the bus space handle */
*bshp = va + offset;
/* Now map the pages */
for (pa = startpa; pa < endpa; pa += PAGE_SIZE, va += PAGE_SIZE) {
pmap_enter(pmap_kernel(), va, pa,
VM_PROT_READ | VM_PROT_WRITE,
VM_PROT_READ | VM_PROT_WRITE | PMAP_WIRED);
}
pmap_update(pmap_kernel());
return(0);
}
void
ep93xx_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size)
{
vaddr_t va;
vaddr_t 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_remove(pmap_kernel(), va, endva);
pmap_update(pmap_kernel());
uvm_km_free(kernel_map, va, endva - va, UVM_KMF_VAONLY);
}
int
ep93xx_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 cacheable,
bus_addr_t *bpap, bus_space_handle_t *bshp)
{
panic("ep93xx_bs_alloc(): not implemented\n");
}
void
ep93xx_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size)
{
panic("ep93xx_bs_free(): not implemented\n");
}
int
ep93xx_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 *
ep93xx_bs_vaddr(void *t, bus_space_handle_t bsh)
{
return ((void *)bsh);
}
paddr_t
ep93xx_bs_mmap(void *t, bus_addr_t addr, off_t off, int prot, int flags)
{
/* Not supported. */
return (-1);
}
void
ep93xx_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset,
bus_size_t len, int flags)
{
/* NULL */
}
/* End of ep93xx_space.c */