NetBSD-5.0.2/sys/arch/arm/footbridge/isa/isa_io.c
/* $NetBSD: isa_io.c,v 1.3 2003/03/23 14:12:26 chris Exp $ */
/*
* Copyright 1997
* Digital Equipment Corporation. All rights reserved.
*
* This software is furnished under license and may be used and
* copied only in accordance with the following terms and conditions.
* Subject to these conditions, you may download, copy, install,
* use, modify and distribute this software in source and/or binary
* form. No title or ownership is transferred hereby.
*
* 1) Any source code used, modified or distributed must reproduce
* and retain this copyright notice and list of conditions as
* they appear in the source file.
*
* 2) No right is granted to use any trade name, trademark, or logo of
* Digital Equipment Corporation. Neither the "Digital Equipment
* Corporation" name nor any trademark or logo of Digital Equipment
* Corporation may be used to endorse or promote products derived
* from this software without the prior written permission of
* Digital Equipment Corporation.
*
* 3) This software is provided "AS-IS" and any express or implied
* warranties, including but not limited to, any implied warranties
* of merchantability, fitness for a particular purpose, or
* non-infringement are disclaimed. In no event shall DIGITAL be
* liable for any damages whatsoever, and in particular, DIGITAL
* shall not be liable for special, indirect, consequential, or
* incidental damages or damages for lost profits, loss of
* revenue or loss of use, whether such damages arise in contract,
* negligence, tort, under statute, in equity, at law or otherwise,
* even if advised of the possibility of such damage.
*/
/*
* bus_space I/O functions for isa
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: isa_io.c,v 1.3 2003/03/23 14:12:26 chris Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <machine/bus.h>
#include <machine/pio.h>
#include <machine/isa_machdep.h>
/* Proto types for all the bus_space structure functions */
bs_protos(isa);
bs_protos(bs_notimpl);
/*
* Declare the isa bus space tags
* The IO and MEM structs are identical, except for the cookies,
* which contain the address space bases.
*/
/*
* NOTE: ASSEMBLY LANGUAGE RELIES ON THE COOKIE -- THE FIRST MEMBER OF
* THIS STRUCTURE -- TO BE THE VIRTUAL ADDRESS OF ISA/IO!
*/
struct bus_space isa_io_bs_tag = {
/* cookie */
NULL, /* initialized below */
/* mapping/unmapping */
isa_bs_map,
isa_bs_unmap,
isa_bs_subregion,
/* allocation/deallocation */
isa_bs_alloc,
isa_bs_free,
/* get kernel virtual address */
isa_bs_vaddr,
/* mmap bus space for userland */
bs_notimpl_bs_mmap, /* XXX possible even? XXX */
/* barrier */
isa_bs_barrier,
/* read (single) */
isa_bs_r_1,
isa_bs_r_2,
isa_bs_r_4,
bs_notimpl_bs_r_8,
/* read multiple */
isa_bs_rm_1,
isa_bs_rm_2,
isa_bs_rm_4,
bs_notimpl_bs_rm_8,
/* read region */
isa_bs_rr_1,
isa_bs_rr_2,
isa_bs_rr_4,
bs_notimpl_bs_rr_8,
/* write (single) */
isa_bs_w_1,
isa_bs_w_2,
isa_bs_w_4,
bs_notimpl_bs_w_8,
/* write multiple */
isa_bs_wm_1,
isa_bs_wm_2,
isa_bs_wm_4,
bs_notimpl_bs_wm_8,
/* write region */
isa_bs_wr_1,
isa_bs_wr_2,
isa_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,
isa_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,
};
/*
* NOTE: ASSEMBLY LANGUAGE RELIES ON THE COOKIE -- THE FIRST MEMBER OF
* THIS STRUCTURE -- TO BE THE VIRTUAL ADDRESS OF ISA/MEMORY!
*/
struct bus_space isa_mem_bs_tag = {
/* cookie */
NULL, /* initialized below */
/* mapping/unmapping */
isa_bs_map,
isa_bs_unmap,
isa_bs_subregion,
/* allocation/deallocation */
isa_bs_alloc,
isa_bs_free,
/* get kernel virtual address */
isa_bs_vaddr,
/* mmap bus space for userland */
bs_notimpl_bs_mmap, /* XXX open for now ... XXX */
/* barrier */
isa_bs_barrier,
/* read (single) */
isa_bs_r_1,
isa_bs_r_2,
isa_bs_r_4,
bs_notimpl_bs_r_8,
/* read multiple */
isa_bs_rm_1,
isa_bs_rm_2,
isa_bs_rm_4,
bs_notimpl_bs_rm_8,
/* read region */
isa_bs_rr_1,
isa_bs_rr_2,
isa_bs_rr_4,
bs_notimpl_bs_rr_8,
/* write (single) */
isa_bs_w_1,
isa_bs_w_2,
isa_bs_w_4,
bs_notimpl_bs_w_8,
/* write multiple */
isa_bs_wm_1,
isa_bs_wm_2,
isa_bs_wm_4,
bs_notimpl_bs_wm_8,
/* write region */
isa_bs_wr_1,
isa_bs_wr_2,
isa_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,
isa_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 */
void
isa_io_init(isa_io_addr, isa_mem_addr)
vm_offset_t isa_io_addr;
vm_offset_t isa_mem_addr;
{
isa_io_bs_tag.bs_cookie = (void *)isa_io_addr;
isa_mem_bs_tag.bs_cookie = (void *)isa_mem_addr;
}
/*
* break the abstraction: sometimes, other parts of the system
* (e.g. X servers) need to map ISA space directly. use these
* functions sparingly!
*/
vm_offset_t
isa_io_data_vaddr(void)
{
return (vm_offset_t)isa_io_bs_tag.bs_cookie;
}
vm_offset_t
isa_mem_data_vaddr(void)
{
return (vm_offset_t)isa_mem_bs_tag.bs_cookie;
}
int
isa_bs_map(t, bpa, size, cacheable, bshp)
void *t;
bus_addr_t bpa;
bus_size_t size;
int cacheable;
bus_space_handle_t *bshp;
{
*bshp = bpa + (bus_addr_t)t;
return(0);
}
void
isa_bs_unmap(t, bsh, size)
void *t;
bus_space_handle_t bsh;
bus_size_t size;
{
/* Nothing to do. */
}
int
isa_bs_subregion(t, bsh, offset, size, nbshp)
void *t;
bus_space_handle_t bsh;
bus_size_t offset, size;
bus_space_handle_t *nbshp;
{
/* printf("isa_subregion(tag=%p, bsh=%lx, off=%lx, sz=%lx)\n",
t, bsh, offset, size);*/
*nbshp = bsh + offset;
return(0);
}
int
isa_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("isa_alloc(): Help!");
}
void
isa_bs_free(t, bsh, size)
void *t;
bus_space_handle_t bsh;
bus_size_t size;
{
panic("isa_free(): Help!");
}
void *
isa_bs_vaddr(t, bsh)
void *t;
bus_space_handle_t bsh;
{
return ((void *)bsh);
}
void
isa_bs_barrier(t, bsh, offset, len, flags)
void *t;
bus_space_handle_t bsh;
bus_size_t offset, len;
int flags;
{
/* just return */
}