| 0,0 → 1,80 |
|---|
| /* |
| * 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 libcmips32eb |
| */ |
| |
| /* TLS for MIPS is described in http://www.linux-mips.org/wiki/NPTL */ |
| |
| #ifndef __LIBC__mips32THREAD_H__ |
| #define __LIBC__mips32THREAD_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 MIPS_TP_OFFSET 0x7000 |
| |
| typedef struct { |
| void *pst_data; |
| } tcb_t; |
| |
| static inline void __tcb_set(tcb_t *tcb) |
| { |
| void *tp = tcb; |
| tp += MIPS_TP_OFFSET + sizeof(tcb_t); |
| |
| __asm__ volatile ("add $27, %0, $0" : : "r"(tp)); /* Move tls to K1 */ |
| } |
| |
| static inline tcb_t * __tcb_get(void) |
| { |
| void * retval; |
| |
| __asm__ volatile("add %0, $27, $0" : "=r"(retval)); |
| |
| return (tcb_t *)(retval - MIPS_TP_OFFSET - sizeof(tcb_t)); |
| } |
| |
| #endif |
| |
| /** @} |
| */ |
| |