1195333Simp/*- 2195333Simp * Copyright (c) 2009 Neelkanth Natu 3195333Simp * All rights reserved. 4195333Simp * 5195333Simp * Redistribution and use in source and binary forms, with or without 6195333Simp * modification, are permitted provided that the following conditions 7195333Simp * are met: 8195333Simp * 1. Redistributions of source code must retain the above copyright 9195333Simp * notice, this list of conditions and the following disclaimer. 10195333Simp * 2. Redistributions in binary form must reproduce the above copyright 11195333Simp * notice, this list of conditions and the following disclaimer in the 12195333Simp * documentation and/or other materials provided with the distribution. 13195333Simp * 14195333Simp * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15195333Simp * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16195333Simp * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17195333Simp * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18195333Simp * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19195333Simp * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20195333Simp * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21195333Simp * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22195333Simp * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23195333Simp * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24195333Simp * SUCH DAMAGE. 25203509Sneel * 26203509Sneel * $FreeBSD: releng/10.2/sys/mips/sibyte/sb_asm.S 205675 2010-03-26 07:15:27Z neel $ 27195333Simp */ 28195333Simp 29195333Simp#include <machine/asm.h> 30203697Sneel#include <machine/cpuregs.h> 31195333Simp 32195333Simp.set mips64 33195333Simp.set noat 34195333Simp.set noreorder 35195333Simp 36203697Sneel#ifdef SMP 37203697Sneel/* 38203697Sneel * This function must be implemented in assembly because it is called early 39203697Sneel * in AP boot without a valid stack. 40203697Sneel * 41203697Sneel * This cpu number is available in bits 25 to 27 of the coprocessor 0 PRID 42203697Sneel * register. This is not documented in the BCM1250 user manual but can be 43203697Sneel * gleaned from the CFE source code - see sb1250_altcpu.S 44203697Sneel */ 45203697SneelLEAF(platform_processor_id) 46203697Sneel mfc0 v0, MIPS_COP_0_PRID 47203697Sneel srl v0, v0, 25 48203697Sneel jr ra 49203697Sneel and v0, v0, 7 50203697SneelEND(platform_processor_id) 51203697Sneel#endif /* SMP */ 52