1 /* $NetBSD: lwp_private.h,v 1.1 2024/11/30 01:04:12 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2014 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Matt Thomas of 3am Software Foundry. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 #ifndef _OR1K_LWP_PRIVATE_H_ 32 #define _OR1K_LWP_PRIVATE_H_ 33 34 #include <sys/cdefs.h> 35 #include <sys/tls.h> 36 37 /* 38 * On OpenRISC 1000, since displacements are signed 16-bit values, the TCB 39 * Pointer is biased by 0x7000 + sizeof(tcb) so that first thread datum can be 40 * addressed by -28672 thereby leaving 60KB available for use as thread data. 41 */ 42 #define TLS_TP_OFFSET 0x7000 43 #define TLS_DTV_OFFSET 0x8000 44 __CTASSERT(TLS_TP_OFFSET + sizeof(struct tls_tcb) < 0x8000); 45 46 __BEGIN_DECLS 47 48 static __inline void * 49 __lwp_getprivate_fast(void) 50 { 51 void *__tp; 52 __asm("l.ori %0,r10,0" : "=r"(__tp)); 53 return __tp; 54 } 55 56 static __inline void * 57 __lwp_gettcb_fast(void) 58 { 59 void *__tcb; 60 61 __asm __volatile( 62 "l.addi %[__tcb],r10,%[__offset]" 63 : [__tcb] "=r" (__tcb) 64 : [__offset] "n" (-(TLS_TP_OFFSET + sizeof(struct tls_tcb)))); 65 66 return __tcb; 67 } 68 69 static __inline void 70 __lwp_settcb(void *__tcb) 71 { 72 __asm __volatile( 73 "l.addi r10,%[__tcb],%[__offset]" 74 : 75 : [__tcb] "r" (__tcb), 76 [__offset] "n" (TLS_TP_OFFSET + sizeof(struct tls_tcb))); 77 } 78 79 __END_DECLS 80 81 #endif /* !_OR1K_LWP_PRIVATE_H_ */ 82