Differential D2199 Diff 4721 sys/arm64/arm64/bus_space_asm.S

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sys/arm64/arm64/bus_space_asm.S

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svn:eol-style	null	native \ No newline at end of property
svn:keywords	null	FreeBSD=%H \ No newline at end of property
svn:mime-type	null	text/plain \ No newline at end of property

				/*-
				* Copyright (c) 2014 Andrew Turner
				* 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.
				*
				* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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>

				__FBSDID("$FreeBSD$");

				ENTRY(generic_bs_r_1)
				ldrb w0, [x1, x2]
				ret
				END(generic_bs_r_1)

				ENTRY(generic_bs_r_2)
				ldrh w0, [x1, x2]
				ret
				END(generic_bs_r_2)

				ENTRY(generic_bs_r_4)
				ldr w0, [x1, x2]
				ret
				END(generic_bs_r_4)

				ENTRY(generic_bs_r_8)
				ldr x0, [x1, x2]
				ret
				END(generic_bs_r_8)

				ENTRY(generic_bs_rm_1)
				/* If there is anything to read. */
				cbz x4, 2f

				/* Calculate the device address. */
				add x0, x1, x2
				/*
				* x0 = The device address.
				* x3 = The kernel address.
				* x4 = Count
				*/

				/* Read the data. */
				1: ldrb w1, [x0]
				strb w1, [x3], #2
				subs x4, x4, #1
				b.ne 1b

				2: ret
				END(generic_bs_rm_1)

				ENTRY(generic_bs_rm_2)
				/* If there is anything to read. */
				cbz x4, 2f

				/* Calculate the device address. */
				add x0, x1, x2
				/*
				* x0 = The device address.
				* x3 = The kernel address.
				* x4 = Count
				*/

				/* Read the data. */
				1: ldrh w1, [x0]
				strh w1, [x3], #2
				subs x4, x4, #1
				b.ne 1b

				2: ret
				END(generic_bs_rm_2)

				ENTRY(generic_bs_rm_4)
				/* If there is anything to read. */
				cbz x4, 2f

				/* Calculate the device address. */
				add x0, x1, x2
				/*
				* x0 = The device address.
				* x3 = The kernel address.
				* x4 = Count
				*/

				/* Read the data. */
				1: ldr w1, [x0]
				str w1, [x3], #2
				subs x4, x4, #1
				b.ne 1b

				2: ret
				END(generic_bs_rm_4)

				ENTRY(generic_bs_rm_8)
				/* If there is anything to read. */
				cbz x4, 2f

				/* Calculate the device address. */
				add x0, x1, x2
				/*
				* x0 = The device address.
				* x3 = The kernel address.
				* x4 = Count
				*/

				/* Read the data. */
				1: ldr x1, [x0]
				str x1, [x3], #2
				subs x4, x4, #1
				b.ne 1b

				2: ret
				END(generic_bs_rm_8)


				ENTRY(generic_bs_w_1)
				strb w3, [x1, x2]
				ret
				END(generic_bs_w_1)

				ENTRY(generic_bs_w_2)
				strh w3, [x1, x2]
				ret
				END(generic_bs_w_2)

				ENTRY(generic_bs_w_4)
				str w3, [x1, x2]
				ret
				END(generic_bs_w_4)

				ENTRY(generic_bs_w_8)
				str x3, [x1, x2]
				ret
				END(generic_bs_w_8)

				ENTRY(generic_bs_wm_1)
				/* If there is anything to write. */
				cbz x4, 2f

				add x0, x1, x2
				/*
				* x0 = The device address.
				* x3 = The kernel address.
				* x4 = Count
				*/

				/* Write the data */
				1: ldrb w1, [x3], #1
				strb w1, [x0]
				subs x4, x4, #1
				b.ne 1b

				2: ret
				END(generic_bs_wm_1)

				ENTRY(generic_bs_wm_2)
				/* If there is anything to write. */
				cbz x4, 2f

				add x0, x1, x2
				/*
				* x0 = The device address.
				* x3 = The kernel address.
				* x4 = Count
				*/

				/* Write the data */
				1: ldrh w1, [x3], #2
				strh w1, [x0]
				subs x4, x4, #1
				b.ne 1b

				2: ret
				END(generic_bs_wm_2)

				ENTRY(generic_bs_wm_4)
				/* If there is anything to write. */
				cbz x4, 2f

				add x0, x1, x2
				/*
				* x0 = The device address.
				* x3 = The kernel address.
				* x4 = Count
				*/

				/* Write the data */
				1: ldr w1, [x3], #4
				str w1, [x0]
				subs x4, x4, #1
				b.ne 1b

				2: ret
				END(generic_bs_wm_4)

				ENTRY(generic_bs_wm_8)
				/* If there is anything to write. */
				cbz x4, 2f

				add x0, x1, x2
				/*
				* x0 = The device address.
				* x3 = The kernel address.
				* x4 = Count
				*/

				/* Write the data */
				1: ldr x1, [x3], #8
				str x1, [x0]
				subs x4, x4, #1
				b.ne 1b

				2: ret
				END(generic_bs_wm_8)