1 /* $NetBSD: mcontext.h,v 1.1 2014/09/03 19:34:26 matt 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_MCONTEXT_H_ 32 #define _OR1K_MCONTEXT_H_ 33 34 /* 35 */ 36 37 #define _NGREG 33 /* GR1-31, FPCSR */ 38 39 typedef __int64_t __greg_t; 40 typedef __greg_t __gregset_t[_NGREG]; 41 42 #define _REG_R1 0 43 #define _REG_R2 1 44 #define _REG_R3 2 45 #define _REG_R4 3 46 #define _REG_R5 4 47 #define _REG_R6 5 48 #define _REG_R7 6 49 #define _REG_R8 7 50 #define _REG_R9 8 51 #define _REG_R10 9 52 #define _REG_R11 10 53 #define _REG_R12 11 54 #define _REG_R13 12 55 #define _REG_R14 13 56 #define _REG_R15 14 57 #define _REG_R16 15 58 #define _REG_R17 16 59 #define _REG_R18 17 60 #define _REG_R19 18 61 #define _REG_R20 19 62 #define _REG_R21 20 63 #define _REG_R22 21 64 #define _REG_R23 22 65 #define _REG_R24 23 66 #define _REG_R25 24 67 #define _REG_R26 25 68 #define _REG_R27 26 69 #define _REG_R28 27 70 #define _REG_R29 28 71 #define _REG_R30 29 72 #define _REG_R31 30 73 #define _REG_PC 31 74 #define _REG_FPCSR 32 75 76 #define _REG_SP _REG_R1 77 #define _REG_LR _REG_R9 78 #define _REG_TP _REG_R10 79 #define _REG_RV _REG_R11 80 #define _REG_GP _REG_R16 81 82 typedef struct { 83 __gregset_t __gregs; /* General Purpose Register set */ 84 __greg_t __spare[8]; /* future proof */ 85 } mcontext_t; 86 87 /* Machine-dependent uc_flags */ 88 #define _UC_TLSBASE 0x00080000 /* see <sys/ucontext.h> */ 89 90 #define _UC_MACHINE_SP(uc) ((uc)->uc_mcontext.__gregs[_REG_SP]) 91 #define _UC_MACHINE_PC(uc) ((uc)->uc_mcontext.__gregs[_REG_PC]) 92 #define _UC_MACHINE_INTRV(uc) ((uc)->uc_mcontext.__gregs[_REG_RV]) 93 94 #define _UC_MACHINE_SET_PC(uc, pc) _UC_MACHINE_PC(uc) = (pc) 95 96 #if defined(_RTLD_SOURCE) || defined(_LIBC_SOURCE) || defined(__LIBPTHREAD_SOURCE__) 97 #include <sys/tls.h> 98 99 /* 100 * On OpenRISC 1000, since displacements are signed 16-bit values, the TCB 101 * Pointer is biased by 0x7000 + sizeof(tcb) so that first thread datum can be 102 * addressed by -28672 thereby leaving 60KB available for use as thread data. 103 */ 104 #define TLS_TP_OFFSET 0x7000 105 #define TLS_DTV_OFFSET 0x8000 106 __CTASSERT(TLS_TP_OFFSET + sizeof(struct tls_tcb) < 0x8000); 107 108 static __inline void * 109 __lwp_getprivate_fast(void) 110 { 111 void *__tp; 112 __asm("l.ori %0,r10,0" : "=r"(__tp)); 113 return __tp; 114 } 115 116 static __inline void * 117 __lwp_gettcb_fast(void) 118 { 119 void *__tcb; 120 121 __asm __volatile( 122 "l.addi %[__tcb],r10,%[__offset]" 123 : [__tcb] "=r" (__tcb) 124 : [__offset] "n" (-(TLS_TP_OFFSET + sizeof(struct tls_tcb)))); 125 126 return __tcb; 127 } 128 129 static __inline void 130 __lwp_settcb(void *__tcb) 131 { 132 __asm __volatile( 133 "l.addi r10,%[__tcb],%[__offset]" 134 : 135 : [__tcb] "r" (__tcb), 136 [__offset] "n" (TLS_TP_OFFSET + sizeof(struct tls_tcb))); 137 } 138 #endif /* _RTLD_SOURCE || _LIBC_SOURCE || __LIBPTHREAD_SOURCE__ */ 139 140 #endif /* !_OR1K_MCONTEXT_H_ */ 141