/* $NetBSD: isa_io.c,v 1.12 2018/03/16 17:56:33 ryo 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 1.12 2018/03/16 17:56:33 ryo Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/extent.h>
#include <sys/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);
void isa_bs_mallocok(void);
/*
* 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 16 BIT ISA/IO!
*/
struct bus_space isa_io_bs_tag = {
/* cookie */
.bs_cookie = NULL, /* initialized below */
/* mapping/unmapping */
.bs_map = isa_bs_map,
.bs_unmap = isa_bs_unmap,
.bs_subregion = isa_bs_subregion,
/* allocation/deallocation */
.bs_alloc = isa_bs_alloc,
.bs_free = isa_bs_free,
/* get kernel virtual address */
.bs_vaddr = isa_bs_vaddr,
/* mmap bus space for userland */
.bs_mmap = bs_notimpl_bs_mmap, /* XXX possible even? XXX */
/* barrier */
.bs_barrier = isa_bs_barrier,
/* read (single) */
.bs_r_1 = isa_bs_r_1,
.bs_r_2 = isa_bs_r_2,
.bs_r_4 = isa_bs_r_4,
.bs_r_8 = bs_notimpl_bs_r_8,
/* read multiple */
.bs_rm_1 = isa_bs_rm_1,
.bs_rm_2 = isa_bs_rm_2,
.bs_rm_4 = isa_bs_rm_4,
.bs_rm_8 = bs_notimpl_bs_rm_8,
/* read region */
.bs_rr_1 = isa_bs_rr_1,
.bs_rr_2 = isa_bs_rr_2,
.bs_rr_4 = isa_bs_rr_4,
.bs_rr_8 = bs_notimpl_bs_rr_8,
/* write (single) */
.bs_w_1 = isa_bs_w_1,
.bs_w_2 = isa_bs_w_2,
.bs_w_4 = isa_bs_w_4,
.bs_w_8 = bs_notimpl_bs_w_8,
/* write multiple */
.bs_wm_1 = isa_bs_wm_1,
.bs_wm_2 = isa_bs_wm_2,
.bs_wm_4 = isa_bs_wm_4,
.bs_wm_8 = bs_notimpl_bs_wm_8,
/* write region */
.bs_wr_1 = isa_bs_wr_1,
.bs_wr_2 = isa_bs_wr_2,
.bs_wr_4 = isa_bs_wr_4,
.bs_wr_8 = bs_notimpl_bs_wr_8,
/* set multiple */
.bs_sm_1 = bs_notimpl_bs_sm_1,
.bs_sm_2 = bs_notimpl_bs_sm_2,
.bs_sm_4 = bs_notimpl_bs_sm_4,
.bs_sm_8 = bs_notimpl_bs_sm_8,
/* set region */
.bs_sr_1 = bs_notimpl_bs_sr_1,
.bs_sr_2 = isa_bs_sr_2,
.bs_sr_4 = bs_notimpl_bs_sr_4,
.bs_sr_8 = bs_notimpl_bs_sr_8,
/* copy */
.bs_c_1 = bs_notimpl_bs_c_1,
.bs_c_2 = bs_notimpl_bs_c_2,
.bs_c_4 = bs_notimpl_bs_c_4,
.bs_c_8 = 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 */
.bs_cookie = NULL, /* initialized below */
/* mapping/unmapping */
.bs_map = isa_bs_map,
.bs_unmap = isa_bs_unmap,
.bs_subregion = isa_bs_subregion,
/* allocation/deallocation */
.bs_alloc = isa_bs_alloc,
.bs_free = isa_bs_free,
/* get kernel virtual address */
.bs_vaddr = isa_bs_vaddr,
/* mmap bus space for userland */
.bs_mmap = bs_notimpl_bs_mmap, /* XXX open for now ... XXX */
/* barrier */
.bs_barrier = isa_bs_barrier,
/* read (single) */
.bs_r_1 = isa_bs_r_1,
.bs_r_2 = isa_bs_r_2,
.bs_r_4 = isa_bs_r_4,
.bs_r_8 = bs_notimpl_bs_r_8,
/* read multiple */
.bs_rm_1 = isa_bs_rm_1,
.bs_rm_2 = isa_bs_rm_2,
.bs_rm_4 = isa_bs_rm_4,
.bs_rm_8 = bs_notimpl_bs_rm_8,
/* read region */
.bs_rr_1 = isa_bs_rr_1,
.bs_rr_2 = isa_bs_rr_2,
.bs_rr_4 = isa_bs_rr_4,
.bs_rr_8 = bs_notimpl_bs_rr_8,
/* write (single) */
.bs_w_1 = isa_bs_w_1,
.bs_w_2 = isa_bs_w_2,
.bs_w_4 = isa_bs_w_4,
.bs_w_8 = bs_notimpl_bs_w_8,
/* write multiple */
.bs_wm_1 = isa_bs_wm_1,
.bs_wm_2 = isa_bs_wm_2,
.bs_wm_4 = isa_bs_wm_4,
.bs_wm_8 = bs_notimpl_bs_wm_8,
/* write region */
.bs_wr_1 = isa_bs_wr_1,
.bs_wr_2 = isa_bs_wr_2,
.bs_wr_4 = isa_bs_wr_4,
.bs_wr_8 = bs_notimpl_bs_wr_8,
/* set multiple */
.bs_sm_1 = bs_notimpl_bs_sm_1,
.bs_sm_2 = bs_notimpl_bs_sm_2,
.bs_sm_4 = bs_notimpl_bs_sm_4,
.bs_sm_8 = bs_notimpl_bs_sm_8,
/* set region */
.bs_sr_1 = bs_notimpl_bs_sr_1,
.bs_sr_2 = isa_bs_sr_2,
.bs_sr_4 = bs_notimpl_bs_sr_4,
.bs_sr_8 = bs_notimpl_bs_sr_8,
/* copy */
.bs_c_1 = bs_notimpl_bs_c_1,
.bs_c_2 = bs_notimpl_bs_c_2,
.bs_c_4 = bs_notimpl_bs_c_4,
.bs_c_8 = bs_notimpl_bs_c_8,
};
static long isaio_ex_storage[EXTENT_FIXED_STORAGE_SIZE(8) / sizeof(long)];
static long isamem_ex_storage[EXTENT_FIXED_STORAGE_SIZE(8) / sizeof(long)];
static int malloc_safe = 0;
struct extent *isaio_ex;
struct extent *isamem_ex;
void
isa_bs_mallocok(void)
{
malloc_safe = 1;
}
/* bus space functions */
void
isa_io_init(vaddr_t isa_io_addr, vaddr_t isa_mem_addr)
{
isa_io_bs_tag.bs_cookie = (void *)isa_io_addr;
isa_mem_bs_tag.bs_cookie = (void *)isa_mem_addr;
isaio_ex = extent_create("isaio", 0x0, 0xffff,
(void *)isaio_ex_storage, sizeof(isaio_ex_storage),
EX_NOWAIT|EX_NOCOALESCE);
isamem_ex = extent_create("isamem", 0x0, 0xfffff,
(void *)isamem_ex_storage, sizeof(isamem_ex_storage),
EX_NOWAIT|EX_NOCOALESCE);
if (isaio_ex == NULL || isamem_ex == NULL)
panic("isa_io_init(): can't alloc extent maps");
}
/*
* break the abstraction: sometimes, other parts of the system
* (e.g. X servers) need to map ISA space directly. use these
* functions sparingly!
*/
vaddr_t
isa_io_data_vaddr(void)
{
return (vaddr_t)isa_io_bs_tag.bs_cookie;
}
vaddr_t
isa_mem_data_vaddr(void)
{
return (vaddr_t)isa_mem_bs_tag.bs_cookie;
}
int
isa_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int cacheable, bus_space_handle_t *bshp)
{
struct extent *ex;
int err;
if (t == isa_io_bs_tag.bs_cookie)
ex = isaio_ex;
else
ex = isamem_ex;
err = extent_alloc_region(ex, bpa, size,
EX_NOWAIT|(malloc_safe ? EX_MALLOCOK : 0));
if (err)
return err;
*bshp = bpa + (bus_addr_t)t;
return(0);
}
void
isa_bs_unmap(void *t, bus_space_handle_t bsh, bus_size_t size)
{
isa_bs_free(t, bsh, size);
}
int
isa_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);
}
int
isa_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)
{
struct extent *ex;
u_long bpa;
int err;
if (t == isa_io_bs_tag.bs_cookie)
ex = isaio_ex;
else
ex = isamem_ex;
err = extent_alloc_subregion(ex, rstart, rend, size, alignment,
boundary, (EX_FAST|EX_NOWAIT|(malloc_safe ? EX_MALLOCOK : 0)),
&bpa);
if (err)
return err;
*bshp = *bpap = bpa + (bus_addr_t)t;
return 0;
}
void
isa_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size)
{
struct extent *ex;
if (t == isa_io_bs_tag.bs_cookie)
ex = isaio_ex;
else
ex = isamem_ex;
extent_free(ex, bsh - (bus_addr_t)t, size,
EX_NOWAIT|(malloc_safe ? EX_MALLOCOK : 0));
}
void *
isa_bs_vaddr(void *t, bus_space_handle_t bsh)
{
return ((void *)bsh);
}
void
isa_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset, bus_size_t len, int flags)
{
/* just return */
}