pcpu.h (3962B) - Raw
1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 */ 30 31 #ifndef _MACHINE_PCPU_H_ 32 #define _MACHINE_PCPU_H_ 33 34 #ifdef _KERNEL 35 36 #include <sys/_lock.h> 37 #include <sys/_mutex.h> 38 39 struct vmspace; 40 41 #endif /* _KERNEL */ 42 43 /* Branch predictor hardening method */ 44 #define PCPU_BP_HARDEN_KIND_NONE 0 45 #define PCPU_BP_HARDEN_KIND_BPIALL 1 46 #define PCPU_BP_HARDEN_KIND_ICIALLU 2 47 48 #define PCPU_MD_FIELDS \ 49 unsigned int pc_vfpsid; \ 50 unsigned int pc_vfpmvfr0; \ 51 unsigned int pc_vfpmvfr1; \ 52 struct pmap *pc_curpmap; \ 53 struct mtx pc_cmap_lock; \ 54 void *pc_cmap1_pte2p; \ 55 void *pc_cmap2_pte2p; \ 56 caddr_t pc_cmap1_addr; \ 57 caddr_t pc_cmap2_addr; \ 58 vm_offset_t pc_qmap_addr; \ 59 void *pc_qmap_pte2p; \ 60 unsigned int pc_dbreg[32]; \ 61 int pc_dbreg_cmd; \ 62 int pc_bp_harden_kind; \ 63 uint32_t pc_original_actlr; \ 64 uint64_t pc_clock; \ 65 uint32_t pc_mpidr; \ 66 char __pad[135] 67 68 #ifdef _KERNEL 69 70 #define PC_DBREG_CMD_NONE 0 71 #define PC_DBREG_CMD_LOAD 1 72 73 struct pcb; 74 struct pcpu; 75 76 extern struct pcpu *pcpup; 77 78 #define CPU_MASK (0xf) 79 80 #ifndef SMP 81 #define get_pcpu() (pcpup) 82 #else 83 #define get_pcpu() __extension__ ({ \ 84 int id; \ 85 __asm __volatile("mrc p15, 0, %0, c0, c0, 5" : "=r" (id)); \ 86 (pcpup + (id & CPU_MASK)); \ 87 }) 88 #endif 89 90 static inline struct thread * 91 get_curthread(void) 92 { 93 void *ret; 94 95 __asm __volatile("mrc p15, 0, %0, c13, c0, 4" : "=r" (ret)); 96 return (ret); 97 } 98 99 static inline void 100 set_curthread(struct thread *td) 101 { 102 103 __asm __volatile("mcr p15, 0, %0, c13, c0, 4" : : "r" (td)); 104 } 105 106 static inline void * 107 get_tls(void) 108 { 109 void *tls; 110 111 /* TPIDRURW contains the authoritative value. */ 112 __asm __volatile("mrc p15, 0, %0, c13, c0, 2" : "=r" (tls)); 113 return (tls); 114 } 115 116 static inline void 117 set_tls(void *tls) 118 { 119 120 /* 121 * Update both TPIDRURW and TPIDRURO. TPIDRURW needs to be written 122 * first to ensure that a context switch between the two writes will 123 * still give the desired result of updating both. 124 */ 125 __asm __volatile( 126 "mcr p15, 0, %0, c13, c0, 2\n" 127 "mcr p15, 0, %0, c13, c0, 3\n" 128 : : "r" (tls)); 129 } 130 131 #define curthread get_curthread() 132 133 134 #define PCPU_GET(member) (get_pcpu()->pc_ ## member) 135 #define PCPU_ADD(member, value) (get_pcpu()->pc_ ## member += (value)) 136 #define PCPU_PTR(member) (&get_pcpu()->pc_ ## member) 137 #define PCPU_SET(member,value) (get_pcpu()->pc_ ## member = (value)) 138 139 #define PCPU_GET_MPIDR(pc) ((pc)->pc_mpidr) 140 141 void pcpu0_init(void); 142 #endif /* _KERNEL */ 143 144 #endif /* !_MACHINE_PCPU_H_ */