/* $NetBSD: bus_mem.c,v 1.14 2017/05/22 16:39:40 ragge Exp $ */
/*
* Copyright (c) 1998 Matt Thomas
* All rights reserved.
*
* This code is derived from software contributed to Ludd by Bertram Barth.
*
* 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.
*
* 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 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: bus_mem.c,v 1.14 2017/05/22 16:39:40 ragge Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/types.h>
#include <sys/cpu.h>
#include <sys/bus.h>
#include <sys/device.h>
#include <sys/intr.h>
#include <sys/kernel.h>
#include <uvm/uvm_extern.h>
static int
vax_mem_bus_space_map(
void *t,
bus_addr_t pa,
bus_size_t size,
int cacheable,
bus_space_handle_t *bshp,
int f2)
{
vaddr_t va;
size += (pa & VAX_PGOFSET); /* have to include the byte offset */
va = uvm_km_alloc(kernel_map, size, 0, UVM_KMF_VAONLY | UVM_KMF_NOWAIT);
if (va == 0)
return (ENOMEM);
*bshp = (bus_space_handle_t)(va + (pa & VAX_PGOFSET));
ioaccess(va, pa, (size + VAX_NBPG - 1) >> VAX_PGSHIFT);
return 0;
}
static int
vax_mem_bus_space_subregion(
void *t,
bus_space_handle_t h,
bus_size_t o,
bus_size_t s,
bus_space_handle_t *hp)
{
*hp = h + o;
return (0);
}
static void
vax_mem_bus_space_unmap(
void *t,
bus_space_handle_t h,
bus_size_t size,
int f)
{
u_long va = trunc_page(h);
u_long endva = round_page(h + size);
/*
* Free the kernel virtual mapping.
*/
iounaccess(va, size >> VAX_PGSHIFT);
uvm_km_free(kernel_map, va, endva - va, UVM_KMF_VAONLY);
}
static int
vax_mem_bus_space_alloc(
void *t,
bus_addr_t rs,
bus_addr_t re,
bus_size_t s,
bus_size_t a,
bus_size_t b,
int f,
bus_addr_t *ap,
bus_space_handle_t *hp)
{
panic("vax_mem_bus_alloc not implemented");
}
static void
vax_mem_bus_space_free(
void *t,
bus_space_handle_t h,
bus_size_t s)
{
panic("vax_mem_bus_free not implemented");
}
static paddr_t
vax_mem_bus_space_mmap(void *v, bus_addr_t addr, off_t off, int prot, int flags)
{
bus_addr_t rv;
rv = addr + off;
return btop(rv);
}
struct vax_bus_space vax_mem_bus_space = {
NULL,
vax_mem_bus_space_map,
vax_mem_bus_space_unmap,
vax_mem_bus_space_subregion,
vax_mem_bus_space_alloc,
vax_mem_bus_space_free,
vax_mem_bus_space_mmap,
};