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/* $OpenBSD: mainbus_io.c,v 1.1 2004/02/01 05:09:49 drahn Exp $ */
/* $NetBSD: mainbus_io.c,v 1.14 2003/12/06 22:05:33 bjh21 Exp $ */
/*
* Copyright (c) 1997 Mark Brinicombe.
* 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 Mark Brinicombe.
* 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 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 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.
*/
/*
* bus_space I/O functions for mainbus
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/queue.h>
#include <uvm/uvm.h>
#include <machine/bus.h>
#include <machine/pmap.h>
/* Proto types for all the bus_space structure functions */
bs_protos(mainbus);
bs_protos(bs_notimpl);
/* Declare the mainbus bus space tag */
struct bus_space mainbus_bs_tag = {
/* cookie */
NULL,
/* mapping/unmapping */
mainbus_bs_map,
mainbus_bs_unmap,
mainbus_bs_subregion,
/* allocation/deallocation */
mainbus_bs_alloc,
mainbus_bs_free,
/* get kernel virtual address */
0, /* there is no linear mapping */
/* Mmap bus space for user */
mainbus_bs_mmap,
/* barrier */
mainbus_bs_barrier,
/* read (single) */
mainbus_bs_r_1,
mainbus_bs_r_2,
mainbus_bs_r_4,
bs_notimpl_bs_r_8,
/* read multiple */
bs_notimpl_bs_rm_1,
mainbus_bs_rm_2,
bs_notimpl_bs_rm_4,
bs_notimpl_bs_rm_8,
/* read region */
bs_notimpl_bs_rr_1,
bs_notimpl_bs_rr_2,
bs_notimpl_bs_rr_4,
bs_notimpl_bs_rr_8,
/* write (single) */
mainbus_bs_w_1,
mainbus_bs_w_2,
mainbus_bs_w_4,
bs_notimpl_bs_w_8,
/* write multiple */
mainbus_bs_wm_1,
mainbus_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,
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,
};
/* bus space functions */
int
mainbus_bs_map(t, bpa, size, flags, bshp)
void *t;
bus_addr_t bpa;
bus_size_t size;
int flags;
bus_space_handle_t *bshp;
{
u_long startpa, endpa, pa;
vaddr_t va;
pt_entry_t *pte;
if ((u_long)bpa > (u_long)KERNEL_BASE) {
/* XXX This is a temporary hack to aid transition. */
*bshp = bpa;
return(0);
}
startpa = trunc_page(bpa);
endpa = round_page(bpa + size);
/* XXX use extent manager to check duplicate mapping */
va = uvm_km_valloc(kernel_map, endpa - startpa);
if (! va)
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 ((flags & BUS_SPACE_MAP_CACHEABLE) == 0) {
pte = vtopte(va);
*pte &= ~L2_S_CACHE_MASK;
PTE_SYNC(pte);
}
}
pmap_update(pmap_kernel());
return(0);
}
int
mainbus_bs_alloc(t, rstart, rend, size, alignment, boundary, cacheable,
bpap, bshp)
void *t;
bus_addr_t rstart, rend;
bus_size_t size, alignment, boundary;
int cacheable;
bus_addr_t *bpap;
bus_space_handle_t *bshp;
{
panic("mainbus_bs_alloc(): Help!");
}
void
mainbus_bs_unmap(t, bsh, size)
void *t;
bus_space_handle_t bsh;
bus_size_t size;
{
/*
* Temporary implementation
*/
}
void
mainbus_bs_free(t, bsh, size)
void *t;
bus_space_handle_t bsh;
bus_size_t size;
{
panic("mainbus_bs_free(): Help!");
/* mainbus_bs_unmap() does all that we need to do. */
/* mainbus_bs_unmap(t, bsh, size);*/
}
int
mainbus_bs_subregion(t, bsh, offset, size, nbshp)
void *t;
bus_space_handle_t bsh;
bus_size_t offset, size;
bus_space_handle_t *nbshp;
{
*nbshp = bsh + (offset << 2);
return (0);
}
paddr_t
mainbus_bs_mmap(t, paddr, offset, prot, flags)
void *t;
bus_addr_t paddr;
off_t offset;
int prot;
int flags;
{
/*
* mmap from address `paddr+offset' for one page
*/
return (arm_btop((paddr + offset)));
}
void
mainbus_bs_barrier(t, bsh, offset, len, flags)
void *t;
bus_space_handle_t bsh;
bus_size_t offset, len;
int flags;
{
}
/* End of mainbus_io.c */
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