NetBSD-5.0.2/sys/arch/arm/sa11x0/sa11x0_io_asm.S
/* $NetBSD: sa11x0_io_asm.S,v 1.4 2006/06/27 13:58:08 peter Exp $ */
/*
* Copyright (c) 1997 Mark Brinicombe.
* Copyright (c) 1997 Causality Limited.
* All rights reserved.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Mark Brinicombe.
* 4. The name of the company nor the name of the author may be used to
* endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR OR CONTRIBUTORS 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.
*/
#include <machine/asm.h>
/*
* bus_space I/O functions for sa11x0
*/
/*
* read single
*/
ENTRY(sa11x0_bs_r_1)
ldrb r0, [r1, r2]
mov pc, lr
ENTRY(sa11x0_bs_r_2)
ldrh r0, [r1, r2]
mov pc, lr
ENTRY(sa11x0_bs_r_4)
ldr r0, [r1, r2]
mov pc, lr
/*
* write single
*/
ENTRY(sa11x0_bs_w_1)
strb r3, [r1, r2]
mov pc, lr
ENTRY(sa11x0_bs_w_2)
strh r3, [r1, r2]
mov pc, lr
ENTRY(sa11x0_bs_w_4)
str r3, [r1, r2]
mov pc, lr
/*
* read multiple
*/
ENTRY(sa11x0_bs_rm_1)
add r0, r1, r2
ldr r2, [sp, #0]
cmp r2, #0x00000000
movle pc, lr
sa11x0_bs_rm_1_loop:
ldrb r1, [r0]
subs r2, r2, #0x00000001
strb r1, [r3], #0x0001
bgt sa11x0_bs_rm_1_loop
mov pc, lr
ENTRY(sa11x0_bs_rm_2)
add r0, r1, r2
ldr r2, [sp, #0]
cmp r2, #0x00000000
movle pc, lr
tst r2, #0x00000007
tsteq r3, #0x00000003
beq sa11x0_bs_rm_2_fast
sa11x0_bs_rm_2_loop:
ldrh r1, [r0]
subs r2, r2, #0x00000001
strh r1, [r3], #0x0002
bgt sa11x0_bs_rm_2_loop
mov pc, lr
sa11x0_bs_rm_2_fast:
stmfd sp!, {r4, r5, lr}
sa11x0_bs_rm_2_fastloop:
ldrh r1, [r0]
ldrh lr, [r0]
orr r1, r1, lr, lsl #16
ldrh r4, [r0]
ldrh lr, [r0]
orr r4, r4, lr, lsl #16
ldrh r5, [r0]
ldrh lr, [r0]
orr r5, r5, lr, lsl #16
ldrh ip, [r0]
ldrh lr, [r0]
orr ip, ip, lr, lsl #16
stmia r3!, {r1, r4, r5, ip}
subs r2, r2, #8
bgt sa11x0_bs_rm_2_fastloop
ldmfd sp!, {r4, r5, pc}
ENTRY(sa11x0_bs_rm_4)
add r0, r1, r2
ldr r2, [sp, #0]
cmp r2, #0x00000000
movle pc, lr
sa11x0_bs_rm_4_loop:
ldr r1, [r0]
subs r2, r2, #0x00000001
str r1, [r3], #0x0004
bgt sa11x0_bs_rm_4_loop
mov pc, lr
/*
* write multiple
*/
ENTRY(sa11x0_bs_wm_1)
add r0, r1, r2
ldr r2, [sp, #0]
cmp r2, #0x00000000
movle pc, lr
sa11x0_wm_1_loop:
ldrb r1, [r3], #0x0001
subs r2, r2, #0x00000001
strb r1, [r0]
bgt sa11x0_wm_1_loop
mov pc, lr
ENTRY(sa11x0_bs_wm_2)
add r0, r1, r2
ldr r2, [sp, #0]
cmp r2, #0x00000000
movle pc, lr
sa11x0_bs_wm_2_loop:
ldrh r1, [r3], #0x0002
subs r2, r2, #0x00000001
strh r1, [r0]
bgt sa11x0_bs_wm_2_loop
mov pc, lr
ENTRY(sa11x0_bs_wm_4)
add r0, r1, r2
ldr r2, [sp, #0]
cmp r2, #0x00000000
movle pc, lr
sa11x0_bs_wm_4_loop:
ldr r1, [r3], #0x0004
subs r2, r2, #0x00000001
str r1, [r0]
bgt sa11x0_bs_wm_4_loop
mov pc, lr
/*
* read region
*/
ENTRY(sa11x0_bs_rr_2)
add r0, r1, r2
ldr r2, [sp, #0]
cmp r2, #0x00000000
movle pc, lr
sa11x0_bs_rr_2_loop:
ldrh r1, [r0], #0x0002
strh r1, [r3], #0x0002
subs r2, r2, #0x00000001
bgt sa11x0_bs_rr_2_loop
mov pc, lr
/*
* write region
*/
ENTRY(sa11x0_bs_wr_2)
add r0, r1, r2
ldr r2, [sp, #0]
cmp r2, #0x00000000
movle pc, lr
sa11x0_bs_wr_2_loop:
ldrh r1, [r3], #0x0002
strh r1, [r0], #0x0002
subs r2, r2, #0x00000001
bgt sa11x0_bs_wr_2_loop
mov pc, lr
/*
* set region
*/
ENTRY(sa11x0_bs_sr_2)
add r0, r1, r2
ldr r2, [sp, #0]
cmp r2, #0x00000000
movle pc, lr
sa11x0_bs_sr_2_loop:
strh r3, [r0], #0x0002
subs r2, r2, #0x00000001
bgt sa11x0_bs_sr_2_loop
mov pc, lr
/*
* copy region
*/
ENTRY(sa11x0_bs_c_2)
add r0, r1, r2
ldr r2, [sp, #0]
add r1, r2, r3
ldr r2, [sp, #4]
cmp r2, #0x00000000
movle pc, lr
cmp r0, r1
blt sa11x0_bs_c_2_backwards
sa11x0_bs_cf_2_loop:
ldrh r3, [r0], #0x0002
strh r3, [r1], #0x0002
subs r2, r2, #0x00000001
bgt sa11x0_bs_cf_2_loop
mov pc, lr
sa11x0_bs_c_2_backwards:
add r0, r0, r2, lsl #1
add r1, r1, r2, lsl #1
sub r0, r0, #2
sub r1, r1, #2
sa11x0_bs_cb_2_loop:
ldrh r3, [r0], #-2
strh r3, [r1], #-2
subs r2, r2, #1
bne sa11x0_bs_cb_2_loop
mov pc, lr