182 lines
3.8 KiB
C
182 lines
3.8 KiB
C
/*-
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* Copyright (c) 2009, Oleksandr Tymoshenko <gonzo@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <machine/bus.h>
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#include <mips/atheros/ar71xx_bus_space_reversed.h>
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static bs_r_1_proto(reversed);
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static bs_r_2_proto(reversed);
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static bs_w_1_proto(reversed);
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static bs_w_2_proto(reversed);
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/*
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* Bus space that handles offsets in word for 1/2 bytes read/write access.
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* Byte order of values is handled by device drivers itself.
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*/
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static struct bus_space bus_space_reversed = {
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/* cookie */
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(void *) 0,
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/* mapping/unmapping */
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generic_bs_map,
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generic_bs_unmap,
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generic_bs_subregion,
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/* allocation/deallocation */
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NULL,
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NULL,
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/* barrier */
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generic_bs_barrier,
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/* read (single) */
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reversed_bs_r_1,
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reversed_bs_r_2,
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generic_bs_r_4,
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NULL,
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/* read multiple */
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generic_bs_rm_1,
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generic_bs_rm_2,
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generic_bs_rm_4,
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NULL,
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/* read region */
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generic_bs_rr_1,
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generic_bs_rr_2,
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generic_bs_rr_4,
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NULL,
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/* write (single) */
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reversed_bs_w_1,
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reversed_bs_w_2,
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generic_bs_w_4,
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NULL,
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/* write multiple */
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generic_bs_wm_1,
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generic_bs_wm_2,
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generic_bs_wm_4,
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NULL,
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/* write region */
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NULL,
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generic_bs_wr_2,
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generic_bs_wr_4,
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NULL,
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/* set multiple */
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NULL,
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NULL,
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NULL,
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NULL,
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/* set region */
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NULL,
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generic_bs_sr_2,
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generic_bs_sr_4,
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NULL,
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/* copy */
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NULL,
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generic_bs_c_2,
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NULL,
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NULL,
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/* read (single) stream */
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generic_bs_r_1,
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generic_bs_r_2,
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generic_bs_r_4,
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NULL,
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/* read multiple stream */
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generic_bs_rm_1,
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generic_bs_rm_2,
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generic_bs_rm_4,
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NULL,
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/* read region stream */
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generic_bs_rr_1,
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generic_bs_rr_2,
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generic_bs_rr_4,
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NULL,
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/* write (single) stream */
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generic_bs_w_1,
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generic_bs_w_2,
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generic_bs_w_4,
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NULL,
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/* write multiple stream */
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generic_bs_wm_1,
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generic_bs_wm_2,
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generic_bs_wm_4,
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NULL,
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/* write region stream */
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NULL,
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generic_bs_wr_2,
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generic_bs_wr_4,
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NULL,
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};
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bus_space_tag_t ar71xx_bus_space_reversed = &bus_space_reversed;
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static uint8_t
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reversed_bs_r_1(void *t, bus_space_handle_t h, bus_size_t o)
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{
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return readb(h + (o &~ 3) + (3 - (o & 3)));
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}
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static void
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reversed_bs_w_1(void *t, bus_space_handle_t h, bus_size_t o, u_int8_t v)
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{
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writeb(h + (o &~ 3) + (3 - (o & 3)), v);
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}
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static uint16_t
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reversed_bs_r_2(void *t, bus_space_handle_t h, bus_size_t o)
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{
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return readw(h + (o &~ 3) + (2 - (o & 3)));
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}
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static void
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reversed_bs_w_2(void *t, bus_space_handle_t h, bus_size_t o, uint16_t v)
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{
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writew(h + (o &~ 3) + (2 - (o & 3)), v);
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}
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