/* $NetBSD: sm_obio_space_asm.S,v 1.5 2013/08/12 21:17:03 matt Exp $ */
/*
* Copyright (c) 2002, 2003 Genetec Corporation. All rights reserved.
* Written by Hiroyuki Bessho for Genetec Corporation.
*
* 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. The name of Genetec Corporation may not be used to endorse or
* promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY GENETEC CORPORATION ``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 GENETEC CORPORATION
* 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.
*/
/*
* These are special bus space functions for Lubbock's on-board I/O.
* Especially for SMC91c96 chip in 8-bit mode.
*/
#include <machine/asm.h>
RCSID("$NetBSD: sm_obio_space_asm.S,v 1.5 2013/08/12 21:17:03 matt Exp $")
/*
* bus_space I/O functions with offset*4, 8-bit access.
*/
/*
* read single
*/
ENTRY(smobio8_bs_r_2)
add r1, r1, r2, LSL #2
ldrb r0, [r1], #4
ldrb r2, [r1]
orr r0, r0, r2, LSL #8
RET
END(smobio8_bs_r_2)
/*
* write single
*/
ENTRY(smobio8_bs_w_2)
add r1, r1, r2, LSL #2
strb r3, [r1], #4
mov r3, r3, LSR #8
strb r3, [r1]
RET
END(smobio8_bs_w_2)
/*
* read multiple
*/
ENTRY(smobio8_bs_rm_2)
add r0, r1, r2, LSL #2
ldr r2, [sp, #0]
cmp r2, #0x00000000
RETc(le)
Lbs_rm_2_loop:
ldrb r1, [r0]
ldrb lr, [r0, #4]
subs r2, r2, #0x00000001
orr r1, r1, lr, LSL #8
strh r1, [r3], #0x0002
bgt Lbs_rm_2_loop
RET
END(smobio8_bs_rm_2)
/*
* write multiple
*/
ENTRY(smobio8_bs_wm_2)
add r0, r1, r2, LSL #2
ldr r2, [sp, #0]
cmp r2, #0x00000000
RETc(le)
Lbs_wm_2_loop:
ldrh r1, [r3], #0x0002
subs r2, r2, #0x00000001
strb r1, [r0]
mov r1, r1, LSR #8
strb r1, [r0,#4]
bgt Lbs_wm_2_loop
RET
END(smobio8_bs_wm_2)
/*
* For 16-bit mode
*/
/*
* read single
*/
ENTRY(smobio16_bs_r_1)
tst r2, #1 /* Even/Odd ? */
ldrbeq r0, [r1, r2, LSL #2]
RETc(eq)
/* Odd byte. read 16bits and get high byte */
bic r2, r2, #1
add r1, r1, r2, LSL #2
ldrh r0, [r1]
mov r0, r0, LSR #8
RET
END(smobio16_bs_r_1)
/*
* write single
*/
ENTRY(smobio16_bs_w_1)
tst r2, #1 /* Even/Odd ? */
strbeq r3, [r1, r2, LSL #2]
RETc(eq)
/* Odd byte. write 16bit with low byte is 0. */
bic r2, r2, #1
mov r3, r3, LSL #8
add r1, r1, r2, LSL #2
strh r3, [r1]
RET
END(smobio16_bs_w_1)