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 char __pad[147] 69 #else 70 #define PCPU_MD_FIELDS \ 71 char __pad[93] 72 #endif 73 74 #ifdef _KERNEL 75 76 #define PC_DBREG_CMD_NONE 0 77 #define PC_DBREG_CMD_LOAD 1 78 79 struct pcb; 80 struct pcpu; 81 82 extern struct pcpu *pcpup; 83 84 #if __ARM_ARCH >= 6 85 #define CPU_MASK (0xf) 86 87 #ifndef SMP 88 #define get_pcpu() (pcpup) 89 #else 90 #define get_pcpu() __extension__ ({ \ 91 int id; \ 92 __asm __volatile("mrc p15, 0, %0, c0, c0, 5" : "=r" (id)); \ 93 (pcpup + (id & CPU_MASK)); \ 94 }) 95 #endif 96 97 static inline struct thread * 98 get_curthread(void) 99 { 100 void *ret; 101 102 __asm __volatile("mrc p15, 0, %0, c13, c0, 4" : "=r" (ret)); 103 return (ret); 104 } 105 106 static inline void 107 set_curthread(struct thread *td) 108 { 109 110 __asm __volatile("mcr p15, 0, %0, c13, c0, 4" : : "r" (td)); 111 } 112 113 114 static inline void * 115 get_tls(void) 116 { 117 void *tls; 118 119 /* TPIDRURW contains the authoritative value. */ 120 __asm __volatile("mrc p15, 0, %0, c13, c0, 2" : "=r" (tls)); 121 return (tls); 122 } 123 124 static inline void 125 set_tls(void *tls) 126 { 127 128 /* 129 * Update both TPIDRURW and TPIDRURO. TPIDRURW needs to be written 130 * first to ensure that a context switch between the two writes will 131 * still give the desired result of updating both. 132 */ 133 __asm __volatile( 134 "mcr p15, 0, %0, c13, c0, 2\n" 135 "mcr p15, 0, %0, c13, c0, 3\n" 136 : : "r" (tls)); 137 } 138 139 #define curthread get_curthread() 140 141 #else 142 #define get_pcpu() pcpup 143 #endif 144 145 #define PCPU_GET(member) (get_pcpu()->pc_ ## member) 146 #define PCPU_ADD(member, value) (get_pcpu()->pc_ ## member += (value)) 147 #define PCPU_INC(member) PCPU_ADD(member, 1) 148 #define PCPU_PTR(member) (&get_pcpu()->pc_ ## member) 149 #define PCPU_SET(member,value) (get_pcpu()->pc_ ## member = (value)) 150 151 void pcpu0_init(void); 152 #endif /* _KERNEL */ 153 154 #endif /* !_MACHINE_PCPU_H_ */ 155