1 | /*
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2 | * Copyright (c) 2015 Petr Pavlu
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3 | * All rights reserved.
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4 | *
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5 | * Redistribution and use in source and binary forms, with or without
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6 | * modification, are permitted provided that the following conditions
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7 | * are met:
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8 | *
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9 | * - Redistributions of source code must retain the above copyright
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10 | * notice, this list of conditions and the following disclaimer.
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11 | * - Redistributions in binary form must reproduce the above copyright
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12 | * notice, this list of conditions and the following disclaimer in the
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13 | * documentation and/or other materials provided with the distribution.
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14 | * - The name of the author may not be used to endorse or promote products
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15 | * derived from this software without specific prior written permission.
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16 | *
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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27 | */
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28 |
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29 | /** @addtogroup libcarm64
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30 | * @{
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31 | */
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32 | /** @file
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33 | * @brief Thread-local storage.
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34 | */
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35 |
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36 | #ifndef _LIBC_arm64_TLS_H_
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37 | #define _LIBC_arm64_TLS_H_
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38 |
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39 | #define CONFIG_TLS_VARIANT_1
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40 |
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41 | /** Offsets for accessing thread-local variables are shifted 16 bytes higher. */
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42 | #define ARCH_TP_OFFSET (sizeof(tcb_t) - 16)
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43 |
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44 | /** TCB (Thread Control Block) struct.
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45 | *
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46 | * TLS starts just after this struct.
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47 | */
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48 | typedef struct {
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49 | /** Fibril data. */
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50 | void *fibril_data;
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51 | } tcb_t;
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52 |
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53 | static inline void __tcb_raw_set(void *tls)
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54 | {
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55 | asm volatile ("msr tpidr_el0, %[tls]" : : [tls] "r" (tls));
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56 | }
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57 |
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58 | static inline void *__tcb_raw_get(void)
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59 | {
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60 | void *retval;
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61 | asm volatile ("mrs %[tls], tpidr_el0" : [tls] "=r" (retval));
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62 | return retval;
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63 | }
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64 |
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65 | #endif
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66 |
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67 | /** @}
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68 | */
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