mirror of https://github.com/F-Stack/f-stack.git
480 lines
8.1 KiB
ArmAsm
480 lines
8.1 KiB
ArmAsm
/*-
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* Copyright (c) 2014 Andrew Turner
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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, 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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*
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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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*/
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#include <machine/asm.h>
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__FBSDID("$FreeBSD$");
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ENTRY(generic_bs_r_1)
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ldrb w0, [x1, x2]
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ret
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END(generic_bs_r_1)
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ENTRY(generic_bs_r_2)
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ldrh w0, [x1, x2]
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ret
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END(generic_bs_r_2)
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ENTRY(generic_bs_r_4)
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ldr w0, [x1, x2]
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ret
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END(generic_bs_r_4)
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ENTRY(generic_bs_r_8)
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ldr x0, [x1, x2]
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ret
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END(generic_bs_r_8)
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ENTRY(generic_bs_rm_1)
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/* If there is anything to read. */
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cbz x4, 2f
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/* Calculate the device address. */
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add x0, x1, x2
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/*
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* x0 = The device address.
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* x3 = The kernel address.
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* x4 = Count
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*/
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/* Read the data. */
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1: ldrb w1, [x0]
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strb w1, [x3], #1
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subs x4, x4, #1
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b.ne 1b
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2: ret
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END(generic_bs_rm_1)
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ENTRY(generic_bs_rm_2)
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/* If there is anything to read. */
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cbz x4, 2f
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/* Calculate the device address. */
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add x0, x1, x2
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/*
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* x0 = The device address.
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* x3 = The kernel address.
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* x4 = Count
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*/
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/* Read the data. */
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1: ldrh w1, [x0]
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strh w1, [x3], #2
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subs x4, x4, #1
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b.ne 1b
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2: ret
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END(generic_bs_rm_2)
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ENTRY(generic_bs_rm_4)
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/* If there is anything to read. */
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cbz x4, 2f
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/* Calculate the device address. */
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add x0, x1, x2
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/*
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* x0 = The device address.
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* x3 = The kernel address.
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* x4 = Count
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*/
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/* Read the data. */
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1: ldr w1, [x0]
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str w1, [x3], #4
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subs x4, x4, #1
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b.ne 1b
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2: ret
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END(generic_bs_rm_4)
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ENTRY(generic_bs_rm_8)
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/* If there is anything to read. */
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cbz x4, 2f
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/* Calculate the device address. */
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add x0, x1, x2
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/*
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* x0 = The device address.
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* x3 = The kernel address.
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* x4 = Count
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*/
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/* Read the data. */
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1: ldr x1, [x0]
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str x1, [x3], #8
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subs x4, x4, #1
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b.ne 1b
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2: ret
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END(generic_bs_rm_8)
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ENTRY(generic_bs_rr_1)
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/* Is there is anything to read. */
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cbz x4, 2f
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/* Calculate the device address. */
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add x0, x1, x2
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/*
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* x0 = The device address.
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* x3 = The kernel address.
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* x4 = Count
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*/
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/* Read the data. */
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1: ldrb w1, [x0], #1
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strb w1, [x3], #1
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subs x4, x4, #1
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b.ne 1b
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2: ret
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END(generic_bs_rr_1)
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ENTRY(generic_bs_rr_2)
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/* Is there is anything to read. */
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cbz x4, 2f
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/* Calculate the device address. */
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add x0, x1, x2
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/*
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* x0 = The device address.
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* x3 = The kernel address.
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* x4 = Count
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*/
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/* Read the data. */
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1: ldrh w1, [x0], #2
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strh w1, [x3], #2
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subs x4, x4, #1
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b.ne 1b
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2: ret
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END(generic_bs_rr_2)
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ENTRY(generic_bs_rr_4)
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/* Is there is anything to read. */
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cbz x4, 2f
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/* Calculate the device address. */
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add x0, x1, x2
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/*
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* x0 = The device address.
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* x3 = The kernel address.
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* x4 = Count
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*/
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/* Read the data. */
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1: ldr w1, [x0], #4
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str w1, [x3], #4
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subs x4, x4, #1
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b.ne 1b
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2: ret
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END(generic_bs_rr_4)
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ENTRY(generic_bs_rr_8)
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/* Is there is anything to read. */
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cbz x4, 2f
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/* Calculate the device address. */
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add x0, x1, x2
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/*
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* x0 = The device address.
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* x3 = The kernel address.
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* x4 = Count
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*/
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/* Read the data. */
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1: ldr x1, [x0], #8
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str x1, [x3], #8
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subs x4, x4, #1
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b.ne 1b
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2: ret
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END(generic_bs_rr_8)
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ENTRY(generic_bs_w_1)
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strb w3, [x1, x2]
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ret
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END(generic_bs_w_1)
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ENTRY(generic_bs_w_2)
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strh w3, [x1, x2]
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ret
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END(generic_bs_w_2)
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ENTRY(generic_bs_w_4)
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str w3, [x1, x2]
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ret
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END(generic_bs_w_4)
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ENTRY(generic_bs_w_8)
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str x3, [x1, x2]
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ret
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END(generic_bs_w_8)
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ENTRY(generic_bs_wm_1)
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/* If there is anything to write. */
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cbz x4, 2f
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add x0, x1, x2
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/*
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* x0 = The device address.
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* x3 = The kernel address.
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* x4 = Count
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*/
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/* Write the data */
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1: ldrb w1, [x3], #1
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strb w1, [x0]
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subs x4, x4, #1
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b.ne 1b
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2: ret
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END(generic_bs_wm_1)
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ENTRY(generic_bs_wm_2)
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/* If there is anything to write. */
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cbz x4, 2f
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add x0, x1, x2
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/*
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* x0 = The device address.
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* x3 = The kernel address.
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* x4 = Count
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*/
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/* Write the data */
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1: ldrh w1, [x3], #2
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strh w1, [x0]
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subs x4, x4, #1
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b.ne 1b
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2: ret
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END(generic_bs_wm_2)
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ENTRY(generic_bs_wm_4)
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/* If there is anything to write. */
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cbz x4, 2f
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add x0, x1, x2
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/*
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* x0 = The device address.
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* x3 = The kernel address.
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* x4 = Count
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*/
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/* Write the data */
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1: ldr w1, [x3], #4
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str w1, [x0]
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subs x4, x4, #1
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b.ne 1b
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2: ret
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END(generic_bs_wm_4)
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ENTRY(generic_bs_wm_8)
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/* If there is anything to write. */
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cbz x4, 2f
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add x0, x1, x2
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/*
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* x0 = The device address.
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* x3 = The kernel address.
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* x4 = Count
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*/
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/* Write the data */
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1: ldr x1, [x3], #8
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str x1, [x0]
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subs x4, x4, #1
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b.ne 1b
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2: ret
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END(generic_bs_wm_8)
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ENTRY(generic_bs_wr_1)
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/* Is there is anything to write. */
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cbz x4, 2f
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add x0, x1, x2
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/*
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* x0 = The device address.
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* x3 = The kernel address.
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* x4 = Count
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*/
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/* Write the data */
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1: ldrb w1, [x3], #1
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strb w1, [x0], #1
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subs x4, x4, #1
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b.ne 1b
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2: ret
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END(generic_bs_wr_1)
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ENTRY(generic_bs_wr_2)
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/* Is there is anything to write. */
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cbz x4, 2f
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add x0, x1, x2
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/*
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* x0 = The device address.
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* x3 = The kernel address.
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* x4 = Count
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*/
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/* Write the data */
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1: ldrh w1, [x3], #2
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strh w1, [x0], #2
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subs x4, x4, #1
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b.ne 1b
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2: ret
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END(generic_bs_wr_2)
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ENTRY(generic_bs_wr_4)
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/* Is there is anything to write. */
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cbz x4, 2f
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add x0, x1, x2
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/*
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* x0 = The device address.
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* x3 = The kernel address.
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* x4 = Count
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*/
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/* Write the data */
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1: ldr w1, [x3], #4
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str w1, [x0], #4
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subs x4, x4, #1
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b.ne 1b
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2: ret
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END(generic_bs_wr_4)
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ENTRY(generic_bs_wr_8)
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/* Is there is anything to write. */
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cbz x4, 2f
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add x0, x1, x2
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/*
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* x0 = The device address.
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* x3 = The kernel address.
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* x4 = Count
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*/
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/* Write the data */
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1: ldr x1, [x3], #8
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str x1, [x0], #8
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subs x4, x4, #1
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b.ne 1b
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2: ret
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END(generic_bs_wr_8)
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ENTRY(generic_bs_fault)
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mov x0, #-1
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ret
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END(bus_fault)
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ENTRY(generic_bs_peek_1)
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.globl generic_bs_peek_1f
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generic_bs_peek_1f:
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ldrb w0, [x1, x2] /* Checked instruction */
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dsb sy
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strb w0,[x3]
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mov x0, #0
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ret
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END(generic_bs_peek_1)
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ENTRY(generic_bs_peek_2)
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.globl generic_bs_peek_2f
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generic_bs_peek_2f:
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ldrh w0, [x1, x2] /* Checked instruction */
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dsb sy
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strh w0,[x3]
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mov x0, #0
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ret
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END(generic_bs_peek_2)
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ENTRY(generic_bs_peek_4)
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.globl generic_bs_peek_4f
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generic_bs_peek_4f:
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ldr w0, [x1, x2] /* Checked instruction */
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dsb sy
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str w0,[x3]
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mov x0, #0
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ret
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END(generic_bs_peek_4)
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ENTRY(generic_bs_peek_8)
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.globl generic_bs_peek_8f
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generic_bs_peek_8f:
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ldr x0, [x1, x2] /* Checked instruction */
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dsb sy
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str x0,[x3]
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mov x0, #0
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ret
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END(generic_bs_peek_8)
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ENTRY(generic_bs_poke_1)
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.globl generic_bs_poke_1f
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generic_bs_poke_1f:
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strb w3, [x1, x2] /* Checked instruction */
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dsb sy
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mov x0, #0
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ret
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END(generic_bs_poke_1)
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ENTRY(generic_bs_poke_2)
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.globl generic_bs_poke_2f
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generic_bs_poke_2f:
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strh w3, [x1, x2] /* Checked instruction */
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dsb sy
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mov x0, #0
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ret
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END(generic_bs_poke_2)
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ENTRY(generic_bs_poke_4)
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.globl generic_bs_poke_4f
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generic_bs_poke_4f:
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str w3, [x1, x2] /* Checked instruction */
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dsb sy
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mov x0, #0
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ret
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END(generic_bs_poke_4)
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ENTRY(generic_bs_poke_8)
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.globl generic_bs_poke_8f
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generic_bs_poke_8f:
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str x3, [x1, x2] /* Checked instruction */
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dsb sy
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mov x0, #0
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ret
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END(generic_bs_poke_8)
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