/*
* Copyright (c) 2015 Petr Pavlu
* 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 libcarm64
* @{
*/
/** @file
* @brief Thread-local storage.
*/
#ifndef _LIBC_arm64_TLS_H_
#define _LIBC_arm64_TLS_H_
#define CONFIG_TLS_VARIANT_1
/** Offsets for accessing thread-local variables are shifted 16 bytes higher. */
#define ARCH_TP_OFFSET (sizeof(tcb_t) - 16)
/** TCB (Thread Control Block) struct.
*
* TLS starts just after this struct.
*/
typedef struct {
/** Fibril data. */
void *fibril_data;
} tcb_t;
static inline void __tcb_raw_set(void *tls)
{
asm volatile ("msr tpidr_el0, %[tls]" : : [tls] "r" (tls));
}
static inline void *__tcb_raw_get(void)
{
void *retval;
asm volatile ("mrs %[tls], tpidr_el0" : [tls] "=r" (retval));
return retval;
}
#endif
/** @}
*/