Rev 2082 | Rev 2482 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1113 | palkovsky | 1 | /* |
| 2071 | jermar | 2 | * Copyright (c) 2006 Ondrej Palkovsky |
| 1113 | palkovsky | 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 | * |
||
| 9 | * - Redistributions of source code must retain the above copyright |
||
| 10 | * notice, this list of conditions and the following disclaimer. |
||
| 11 | * - Redistributions in binary form must reproduce the above copyright |
||
| 12 | * notice, this list of conditions and the following disclaimer in the |
||
| 13 | * documentation and/or other materials provided with the distribution. |
||
| 14 | * - The name of the author may not be used to endorse or promote products |
||
| 15 | * derived from this software without specific prior written permission. |
||
| 16 | * |
||
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
||
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
||
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
||
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
||
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
||
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
||
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
||
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
||
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
||
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||
| 27 | */ |
||
| 28 | |||
| 1866 | jermar | 29 | /** @addtogroup libcmips32 |
| 1656 | cejka | 30 | * @{ |
| 31 | */ |
||
| 32 | /** @file |
||
| 1657 | cejka | 33 | * @ingroup libcmips32eb |
| 1656 | cejka | 34 | */ |
| 35 | |||
| 1120 | palkovsky | 36 | /* TLS for MIPS is described in http://www.linux-mips.org/wiki/NPTL */ |
| 37 | |||
| 1866 | jermar | 38 | #ifndef LIBC_mips32THREAD_H_ |
| 39 | #define LIBC_mips32THREAD_H_ |
||
| 1113 | palkovsky | 40 | |
| 1129 | palkovsky | 41 | /* I did not find any specification (neither MIPS nor PowerPC), but |
| 42 | * as I found it |
||
| 43 | * - it uses Variant II |
||
| 44 | * - TCB is at Address(First TLS Block)+0x7000. |
||
| 45 | * - DTV is at Address(First TLS Block)+0x8000 |
||
| 46 | * - What would happen if the TLS data was larger then 0x7000? |
||
| 47 | * - The linker never accesses DTV directly, has the second definition any |
||
| 48 | * sense? |
||
| 49 | * We will make it this way: |
||
| 50 | * - TCB is at TP-0x7000-sizeof(tcb) |
||
| 51 | * - No assumption about DTV etc., but it will not have a fixed address |
||
| 52 | */ |
||
| 53 | #define MIPS_TP_OFFSET 0x7000 |
||
| 54 | |||
| 55 | typedef struct { |
||
| 56 | void *pst_data; |
||
| 57 | } tcb_t; |
||
| 58 | |||
| 59 | static inline void __tcb_set(tcb_t *tcb) |
||
| 1113 | palkovsky | 60 | { |
| 1129 | palkovsky | 61 | void *tp = tcb; |
| 62 | tp += MIPS_TP_OFFSET + sizeof(tcb_t); |
||
| 63 | |||
| 2082 | decky | 64 | asm volatile ("add $27, %0, $0" : : "r"(tp)); /* Move tls to K1 */ |
| 1113 | palkovsky | 65 | } |
| 66 | |||
| 1129 | palkovsky | 67 | static inline tcb_t * __tcb_get(void) |
| 1113 | palkovsky | 68 | { |
| 69 | void * retval; |
||
| 70 | |||
| 2082 | decky | 71 | asm volatile("add %0, $27, $0" : "=r"(retval)); |
| 1129 | palkovsky | 72 | |
| 73 | return (tcb_t *)(retval - MIPS_TP_OFFSET - sizeof(tcb_t)); |
||
| 1113 | palkovsky | 74 | } |
| 75 | |||
| 76 | #endif |
||
| 1656 | cejka | 77 | |
| 1866 | jermar | 78 | /** @} |
| 1656 | cejka | 79 | */ |