1/*- 2 * Copyright (c) 2004-2010 Juli Mallett <jmallett@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <machine/asm.h> 28 29 .set noreorder 30 31#ifdef SMP 32/* 33 * This function must be implemented in assembly because it is called early 34 * in AP boot without a valid stack. 35 */ 36LEAF(platform_processor_id) 37 .set push 38 .set mips32r2 39 jr ra 40 rdhwr v0, $0 41 .set pop 42END(platform_processor_id) 43 44/* 45 * Called on APs to wait until they are told to launch. 46 */ 47LEAF(octeon_ap_wait) 48 jal platform_processor_id 49 nop 50 511: ll t0, octeon_ap_boot 52 bne v0, t0, 1b 53 nop 54 55 move t0, zero 56 sc t0, octeon_ap_boot 57 58 beqz t0, 1b 59 nop 60 61 j mpentry 62 nop 63END(octeon_ap_wait) 64#endif 65