/* * Copyright (c) 2006 Ondrej Palkovsky * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * - 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. * - The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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. */ /** @addtogroup libcmips32 * @{ */ /** @file * @ingroup libcmips32 */ /* TLS for MIPS is described in http://www.linux-mips.org/wiki/NPTL */ #ifndef _LIBC_mips32_TLS_H_ #define _LIBC_mips32_TLS_H_ /* * FIXME: Note that the use of variant I contradicts the observations made in * the note below. Nevertheless the scheme we have used for allocating and * deallocatin TLS corresponds to TLS variant I. */ #define CONFIG_TLS_VARIANT_1 #include <libc.h> /* * I did not find any specification (neither MIPS nor PowerPC), but * as I found it * - it uses Variant II * - TCB is at Address(First TLS Block)+0x7000. * - DTV is at Address(First TLS Block)+0x8000 * - What would happen if the TLS data was larger then 0x7000? * - The linker never accesses DTV directly, has the second definition any * sense? * We will make it this way: * - TCB is at TP-0x7000-sizeof(tcb) * - No assumption about DTV etc., but it will not have a fixed address */ #define ARCH_TP_OFFSET (0x7000 + sizeof(tcb_t)) typedef struct { void *fibril_data; } tcb_t; static inline void __tcb_raw_set(void *tls) { /* Move tls to K1 */ asm volatile ("add $27, %0, $0" :: "r" (tls)); } static inline void *__tcb_raw_get(void) { void *retval; asm volatile ("add %0, $27, $0" : "=r" (retval)); return retval; } #endif /** @} */