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      1 /*	$NetBSD: sm_obio_space_asm.S,v 1.5 2013/08/12 21:17:03 matt Exp $ */
      2 
      3 /*
      4  * Copyright (c) 2002, 2003  Genetec Corporation.  All rights reserved.
      5  * Written by Hiroyuki Bessho for Genetec Corporation.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. The name of Genetec Corporation may not be used to endorse or
     16  *    promote products derived from this software without specific prior
     17  *    written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY GENETEC CORPORATION ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL GENETEC CORPORATION
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 /*
     33  * These are special bus space functions for Lubbock's on-board I/O.
     34  * Especially for SMC91c96 chip in 8-bit mode.
     35  */
     36 
     37 #include <machine/asm.h>
     38 
     39 RCSID("$NetBSD: sm_obio_space_asm.S,v 1.5 2013/08/12 21:17:03 matt Exp $")
     40 
     41 /*
     42  * bus_space I/O functions with offset*4, 8-bit access.
     43  */
     44 
     45 /*
     46  * read single
     47  */
     48 
     49 ENTRY(smobio8_bs_r_2)
     50 	add	r1, r1, r2, LSL #2
     51 	ldrb	r0, [r1], #4
     52 	ldrb	r2, [r1]
     53 	orr	r0, r0, r2, LSL #8
     54 	RET
     55 END(smobio8_bs_r_2)
     56 
     57 /*
     58  * write single
     59  */
     60 
     61 ENTRY(smobio8_bs_w_2)
     62 	add	r1, r1, r2, LSL #2
     63 	strb	r3, [r1], #4
     64 	mov	r3, r3, LSR #8
     65 	strb	r3, [r1]
     66 	RET
     67 END(smobio8_bs_w_2)
     68 
     69 /*
     70  * read multiple
     71  */
     72 ENTRY(smobio8_bs_rm_2)
     73 	add	r0, r1, r2, LSL #2
     74 	ldr	r2, [sp, #0]
     75 	cmp     r2, #0x00000000
     76 	RETc(le)
     77 
     78 Lbs_rm_2_loop:
     79 	ldrb	r1, [r0]
     80 	ldrb	lr, [r0, #4]
     81 	subs	r2, r2, #0x00000001
     82 	orr	r1, r1, lr, LSL #8
     83 	strh	r1, [r3], #0x0002
     84 	bgt	Lbs_rm_2_loop
     85 
     86 	RET
     87 END(smobio8_bs_rm_2)
     88 
     89 
     90 
     91 /*
     92  * write multiple
     93  */
     94 ENTRY(smobio8_bs_wm_2)
     95 	add	r0, r1, r2, LSL #2
     96 	ldr	r2, [sp, #0]
     97 	cmp     r2, #0x00000000
     98 	RETc(le)
     99 
    100 Lbs_wm_2_loop:
    101 	ldrh	r1, [r3], #0x0002
    102 	subs	r2, r2, #0x00000001
    103 	strb	r1, [r0]
    104 	mov	r1, r1, LSR #8
    105 	strb	r1, [r0,#4]
    106 	bgt	Lbs_wm_2_loop
    107 
    108 	RET
    109 END(smobio8_bs_wm_2)
    110 
    111 
    112 /*
    113  * For 16-bit mode
    114  */
    115 
    116 /*
    117  * read single
    118  */
    119 
    120 ENTRY(smobio16_bs_r_1)
    121 	tst	r2, #1    /* Even/Odd ? */
    122 	ldrbeq	r0, [r1, r2, LSL #2]
    123 	RETc(eq)
    124 
    125 	/* Odd byte.  read 16bits and get high byte */
    126 	bic	r2, r2, #1
    127 	add	r1, r1, r2, LSL #2
    128 	ldrh	r0, [r1]
    129 	mov	r0, r0, LSR #8
    130 	RET
    131 END(smobio16_bs_r_1)
    132 
    133 
    134 /*
    135  * write single
    136  */
    137 
    138 ENTRY(smobio16_bs_w_1)
    139 	tst	r2, #1    /* Even/Odd ? */
    140 	strbeq	r3, [r1, r2, LSL #2]
    141 	RETc(eq)
    142 
    143 	/* Odd byte.  write 16bit with low byte is 0. */
    144 	bic	r2, r2, #1
    145 	mov	r3, r3, LSL #8
    146 	add	r1, r1, r2, LSL #2
    147 	strh	r3, [r1]
    148 	RET
    149 END(smobio16_bs_w_1)
    150