1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 1999 Luoqi Chen <luoqi@freebsd.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * from: FreeBSD: src/sys/i386/include/globaldata.h,v 1.27 2001/04/27 29 * $FreeBSD$ 30 */ 31 32 #ifndef _MACHINE_PCPU_H_ 33 #define _MACHINE_PCPU_H_ 34 35 #ifdef _KERNEL 36 37 #include <sys/_lock.h> 38 #include <sys/_mutex.h> 39 40 #define ALT_STACK_SIZE 128 41 42 struct vmspace; 43 44 #endif /* _KERNEL */ 45 46 #if __ARM_ARCH >= 6 47 /* Branch predictor hardening method */ 48 #define PCPU_BP_HARDEN_KIND_NONE 0 49 #define PCPU_BP_HARDEN_KIND_BPIALL 1 50 #define PCPU_BP_HARDEN_KIND_ICIALLU 2 51 52 #define PCPU_MD_FIELDS \ 53 unsigned int pc_vfpsid; \ 54 unsigned int pc_vfpmvfr0; \ 55 unsigned int pc_vfpmvfr1; \ 56 struct pmap *pc_curpmap; \ 57 struct mtx pc_cmap_lock; \ 58 void *pc_cmap1_pte2p; \ 59 void *pc_cmap2_pte2p; \ 60 caddr_t pc_cmap1_addr; \ 61 caddr_t pc_cmap2_addr; \ 62 vm_offset_t pc_qmap_addr; \ 63 void *pc_qmap_pte2p; \ 64 unsigned int pc_dbreg[32]; \ 65 int pc_dbreg_cmd; \ 66 int pc_bp_harden_kind; \ 67 uint32_t pc_original_actlr; \ 68 uint64_t pc_clock; \ 69 char __pad[139] 70 #else 71 #define PCPU_MD_FIELDS \ 72 char __pad[93] 73 #endif 74 75 #ifdef _KERNEL 76 77 #define PC_DBREG_CMD_NONE 0 78 #define PC_DBREG_CMD_LOAD 1 79 80 struct pcb; 81 struct pcpu; 82 83 extern struct pcpu *pcpup; 84 85 #if __ARM_ARCH >= 6 86 #define CPU_MASK (0xf) 87 88 #ifndef SMP 89 #define get_pcpu() (pcpup) 90 #else 91 #define get_pcpu() __extension__ ({ \ 92 int id; \ 93 __asm __volatile("mrc p15, 0, %0, c0, c0, 5" : "=r" (id)); \ 94 (pcpup + (id & CPU_MASK)); \ 95 }) 96 #endif 97 98 static inline struct thread * 99 get_curthread(void) 100 { 101 void *ret; 102 103 __asm __volatile("mrc p15, 0, %0, c13, c0, 4" : "=r" (ret)); 104 return (ret); 105 } 106 107 static inline void 108 set_curthread(struct thread *td) 109 { 110 111 __asm __volatile("mcr p15, 0, %0, c13, c0, 4" : : "r" (td)); 112 } 113 114 115 static inline void * 116 get_tls(void) 117 { 118 void *tls; 119 120 /* TPIDRURW contains the authoritative value. */ 121 __asm __volatile("mrc p15, 0, %0, c13, c0, 2" : "=r" (tls)); 122 return (tls); 123 } 124 125 static inline void 126 set_tls(void *tls) 127 { 128 129 /* 130 * Update both TPIDRURW and TPIDRURO. TPIDRURW needs to be written 131 * first to ensure that a context switch between the two writes will 132 * still give the desired result of updating both. 133 */ 134 __asm __volatile( 135 "mcr p15, 0, %0, c13, c0, 2\n" 136 "mcr p15, 0, %0, c13, c0, 3\n" 137 : : "r" (tls)); 138 } 139 140 #define curthread get_curthread() 141 142 #else 143 #define get_pcpu() pcpup 144 #endif 145 146 #define PCPU_GET(member) (get_pcpu()->pc_ ## member) 147 #define PCPU_ADD(member, value) (get_pcpu()->pc_ ## member += (value)) 148 #define PCPU_INC(member) PCPU_ADD(member, 1) 149 #define PCPU_PTR(member) (&get_pcpu()->pc_ ## member) 150 #define PCPU_SET(member,value) (get_pcpu()->pc_ ## member = (value)) 151 152 void pcpu0_init(void); 153 #endif /* _KERNEL */ 154 155 #endif /* !_MACHINE_PCPU_H_ */ 156