freebsd-dev/sys/mips/malta/asm_malta.S
Ruslan Bukin b3410bc623 Avoid repeated address calculation for malta_ap_boot.
Submitted by:	"James Clarke" <jrtc4@cam.ac.uk>
Reviewed by:	br, arichardson
Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D16655
2018-08-14 16:26:44 +00:00

93 lines
2.6 KiB
ArmAsm

/*-
* Copyright (c) 2016 Ruslan Bukin <br@bsdpad.com>
* All rights reserved.
*
* Portions of this software were developed by SRI International and the
* University of Cambridge Computer Laboratory under DARPA/AFRL contract
* FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme.
*
* Portions of this software were developed by the University of Cambridge
* Computer Laboratory as part of the CTSRD Project, with support from the
* UK Higher Education Innovation Fund (HEIF).
*
* 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.
*
* $FreeBSD$
*/
#include <machine/asm.h>
#define VPECONF0_MVP (1 << 1)
#define VPECONF0_VPA (1 << 0)
.set noreorder
#ifdef SMP
/*
* This function must be implemented in assembly because it is called early
* in AP boot without a valid stack.
*/
LEAF(platform_processor_id)
.set push
.set mips32r2
mfc0 v0, $15, 1
jr ra
andi v0, 0x1f
.set pop
END(platform_processor_id)
LEAF(malta_cpu_configure)
.set push
.set mips32r2
.set noat
li t2, (VPECONF0_MVP | VPECONF0_VPA)
move $1, t2
jr ra
.word 0x41810000 | (1 << 11) | 2 # mttc0 t2, $1, 2
.set pop
END(malta_cpu_configure)
/*
* Called on APs to wait until they are told to launch.
*/
LEAF(malta_ap_wait)
jal platform_processor_id
nop
PTR_LA t1, malta_ap_boot
1:
ll t0, 0(t1)
bne v0, t0, 1b
nop
move t0, zero
sc t0, 0(t1)
beqz t0, 1b
nop
j mpentry
nop
END(malta_ap_wait)
#endif