NetBSD-5.0.2/sys/arch/arm/footbridge/footbridge_io.c
/* $NetBSD: footbridge_io.c,v 1.14 2007/10/17 19:53:40 garbled Exp $ */
/*
* Copyright (c) 1997 Causality Limited
* 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
* for the NetBSD Project.
* 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 footbridge
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: footbridge_io.c,v 1.14 2007/10/17 19:53:40 garbled Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <machine/bus.h>
#include <arm/footbridge/footbridge.h>
#include <arm/footbridge/dc21285mem.h>
#include <uvm/uvm_extern.h>
/* Proto types for all the bus_space structure functions */
bs_protos(footbridge);
bs_protos(generic);
bs_protos(generic_armv4);
bs_protos(bs_notimpl);
bs_map_proto(footbridge_mem);
bs_unmap_proto(footbridge_mem);
bs_mmap_proto(footbridge_mem);
/* Declare the footbridge bus space tag */
struct bus_space footbridge_bs_tag = {
/* cookie */
(void *) 0, /* Base address */
/* mapping/unmapping */
footbridge_bs_map,
footbridge_bs_unmap,
footbridge_bs_subregion,
/* allocation/deallocation */
footbridge_bs_alloc,
footbridge_bs_free,
/* get kernel virtual address */
footbridge_bs_vaddr,
/* Mmap bus space for user */
bs_notimpl_bs_mmap,
/* barrier */
footbridge_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 */
bs_notimpl_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 */
bs_notimpl_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,
bs_notimpl_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,
};
void footbridge_create_io_bs_tag(t, cookie)
struct bus_space *t;
void *cookie;
{
*t = footbridge_bs_tag;
t->bs_cookie = cookie;
}
void footbridge_create_mem_bs_tag(t, cookie)
struct bus_space *t;
void *cookie;
{
*t = footbridge_bs_tag;
t->bs_map = footbridge_mem_bs_map;
t->bs_unmap = footbridge_mem_bs_unmap;
t->bs_mmap = footbridge_mem_bs_mmap;
t->bs_cookie = cookie;
}
/* bus space functions */
int
footbridge_bs_map(t, bpa, size, cacheable, bshp)
void *t;
bus_addr_t bpa;
bus_size_t size;
int cacheable;
bus_space_handle_t *bshp;
{
/*
* The whole 64K of PCI space is always completely mapped during
* boot.
*
* Eventually this function will do the mapping check overlapping /
* multiple mappings.
*/
/* The cookie is the base address for the I/O area */
*bshp = bpa + (bus_addr_t)t;
return(0);
}
int
footbridge_mem_bs_map(t, bpa, size, flags, bshp)
void *t;
bus_addr_t bpa;
bus_size_t size;
int flags;
bus_space_handle_t *bshp;
{
bus_addr_t startpa, endpa, pa;
vaddr_t va;
/* Round the allocation to page boundries */
startpa = trunc_page(bpa);
endpa = round_page(bpa + size);
/*
* Check for mappings below 1MB as we have this space already
* mapped. In practice it is only the VGA hole that takes
* advantage of this.
*/
if (endpa < DC21285_PCI_ISA_MEM_VSIZE) {
/* Store the bus space handle */
*bshp = DC21285_PCI_ISA_MEM_VBASE + bpa;
return 0;
}
/*
* Eventually this function will do the mapping check for overlapping /
* multiple mappings
*/
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 + (bpa & PGOFSET);
/* Now map the pages */
/* The cookie is the physical base address for the I/O area */
for (pa = startpa; pa < endpa; pa+=PAGE_SIZE, va += PAGE_SIZE)
{
pmap_enter(pmap_kernel(), va, (bus_addr_t)t + pa, VM_PROT_READ | VM_PROT_WRITE,
VM_PROT_READ | VM_PROT_WRITE| PMAP_WIRED);
if ((flags & BUS_SPACE_MAP_CACHEABLE) == 0) {
pt_entry_t *pte;
pte = vtopte(va);
*pte &= ~L2_S_CACHE_MASK;
PTE_SYNC(pte);
}
}
pmap_update(pmap_kernel());
/* if (bpa >= DC21285_PCI_MEM_VSIZE && bpa != DC21285_ARMCSR_VBASE)
panic("footbridge_bs_map: Address out of range (%08lx)", bpa);
*/
return(0);
}
int
footbridge_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("footbridge_alloc(): Help!");
}
void
footbridge_bs_unmap(t, bsh, size)
void *t;
bus_space_handle_t bsh;
bus_size_t size;
{
/*
* Temporary implementation
*/
}
void
footbridge_mem_bs_unmap(t, bsh, size)
void *t;
bus_space_handle_t bsh;
bus_size_t size;
{
vaddr_t startva, endva;
/*
* Check for mappings below 1MB as we have this space permenantly
* mapped. In practice it is only the VGA hole that takes
* advantage of this.
*/
if (bsh >= DC21285_PCI_ISA_MEM_VBASE
&& bsh < (DC21285_PCI_ISA_MEM_VBASE + DC21285_PCI_ISA_MEM_VSIZE)) {
return;
}
startva = trunc_page(bsh);
endva = round_page(bsh + size);
pmap_remove(pmap_kernel(), startva, endva);
pmap_update(pmap_kernel());
uvm_km_free(kernel_map, startva, endva - startva, UVM_KMF_VAONLY);
}
void
footbridge_bs_free(t, bsh, size)
void *t;
bus_space_handle_t bsh;
bus_size_t size;
{
panic("footbridge_free(): Help!");
/* footbridge_bs_unmap() does all that we need to do. */
/* footbridge_bs_unmap(t, bsh, size);*/
}
int
footbridge_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 << ((int)t));
return (0);
}
void *
footbridge_bs_vaddr(t, bsh)
void *t;
bus_space_handle_t bsh;
{
return ((void *)bsh);
}
void
footbridge_bs_barrier(t, bsh, offset, len, flags)
void *t;
bus_space_handle_t bsh;
bus_size_t offset, len;
int flags;
{
}
paddr_t
footbridge_mem_bs_mmap(void *t, bus_addr_t addr, off_t offset,
int prot, int flags)
{
paddr_t pa;
if (addr >= DC21285_PCI_MEM_SIZE
|| offset < 0
|| offset >= DC21285_PCI_MEM_SIZE
|| addr >= DC21285_PCI_MEM_SIZE - offset)
return -1;
pa = DC21285_PCI_MEM_BASE + addr + offset;
return arm_ptob(pa);
}