150 lines
3.3 KiB
ArmAsm
150 lines
3.3 KiB
ArmAsm
/* $NetBSD: sm_obio_space_asm.S,v 1.5 2013/08/12 21:17:03 matt Exp $ */
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/*
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* Copyright (c) 2002, 2003 Genetec Corporation. All rights reserved.
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* Written by Hiroyuki Bessho for Genetec Corporation.
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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, this list of conditions and the following 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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* 3. The name of Genetec Corporation may not be used to endorse or
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* promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY GENETEC CORPORATION ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GENETEC CORPORATION
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* These are special bus space functions for Lubbock's on-board I/O.
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* Especially for SMC91c96 chip in 8-bit mode.
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*/
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#include <machine/asm.h>
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RCSID("$NetBSD: sm_obio_space_asm.S,v 1.5 2013/08/12 21:17:03 matt Exp $")
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/*
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* bus_space I/O functions with offset*4, 8-bit access.
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*/
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/*
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* read single
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*/
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ENTRY(smobio8_bs_r_2)
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add r1, r1, r2, LSL #2
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ldrb r0, [r1], #4
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ldrb r2, [r1]
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orr r0, r0, r2, LSL #8
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RET
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END(smobio8_bs_r_2)
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/*
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* write single
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*/
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ENTRY(smobio8_bs_w_2)
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add r1, r1, r2, LSL #2
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strb r3, [r1], #4
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mov r3, r3, LSR #8
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strb r3, [r1]
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RET
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END(smobio8_bs_w_2)
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/*
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* read multiple
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*/
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ENTRY(smobio8_bs_rm_2)
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add r0, r1, r2, LSL #2
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ldr r2, [sp, #0]
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cmp r2, #0x00000000
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RETc(le)
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Lbs_rm_2_loop:
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ldrb r1, [r0]
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ldrb lr, [r0, #4]
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subs r2, r2, #0x00000001
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orr r1, r1, lr, LSL #8
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strh r1, [r3], #0x0002
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bgt Lbs_rm_2_loop
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RET
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END(smobio8_bs_rm_2)
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/*
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* write multiple
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*/
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ENTRY(smobio8_bs_wm_2)
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add r0, r1, r2, LSL #2
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ldr r2, [sp, #0]
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cmp r2, #0x00000000
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RETc(le)
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Lbs_wm_2_loop:
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ldrh r1, [r3], #0x0002
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subs r2, r2, #0x00000001
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strb r1, [r0]
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mov r1, r1, LSR #8
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strb r1, [r0,#4]
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bgt Lbs_wm_2_loop
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RET
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END(smobio8_bs_wm_2)
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/*
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* For 16-bit mode
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*/
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/*
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* read single
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*/
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ENTRY(smobio16_bs_r_1)
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tst r2, #1 /* Even/Odd ? */
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ldrbeq r0, [r1, r2, LSL #2]
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RETc(eq)
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/* Odd byte. read 16bits and get high byte */
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bic r2, r2, #1
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add r1, r1, r2, LSL #2
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ldrh r0, [r1]
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mov r0, r0, LSR #8
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RET
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END(smobio16_bs_r_1)
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/*
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* write single
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*/
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ENTRY(smobio16_bs_w_1)
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tst r2, #1 /* Even/Odd ? */
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strbeq r3, [r1, r2, LSL #2]
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RETc(eq)
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/* Odd byte. write 16bit with low byte is 0. */
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bic r2, r2, #1
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mov r3, r3, LSL #8
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add r1, r1, r2, LSL #2
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strh r3, [r1]
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RET
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END(smobio16_bs_w_1)
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