1/*- 2 * Copyright (c) 1999 Luoqi Chen <luoqi@freebsd.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * from: FreeBSD: src/sys/i386/include/globaldata.h,v 1.27 2001/04/27 27 * $FreeBSD: stable/11/sys/arm/include/pcpu.h 331988 2018-04-04 06:11:05Z mmel $ 28 */ 29 30#ifndef _MACHINE_PCPU_H_ 31#define _MACHINE_PCPU_H_ 32 33#ifdef _KERNEL 34 35#include <sys/_lock.h> 36#include <sys/_mutex.h> 37 38#define ALT_STACK_SIZE 128 39 40struct vmspace; 41 42#endif /* _KERNEL */ 43 44#if __ARM_ARCH >= 6 45/* Branch predictor hardening method */ 46#define PCPU_BP_HARDEN_KIND_NONE 0 47#define PCPU_BP_HARDEN_KIND_BPIALL 1 48#define PCPU_BP_HARDEN_KIND_ICIALLU 2 49 50#define PCPU_MD_FIELDS \ 51 unsigned int pc_vfpsid; \ 52 unsigned int pc_vfpmvfr0; \ 53 unsigned int pc_vfpmvfr1; \ 54 struct pmap *pc_curpmap; \ 55 struct mtx pc_cmap_lock; \ 56 void *pc_cmap1_pte2p; \ 57 void *pc_cmap2_pte2p; \ 58 caddr_t pc_cmap1_addr; \ 59 caddr_t pc_cmap2_addr; \ 60 vm_offset_t pc_qmap_addr; \ 61 void *pc_qmap_pte2p; \ 62 unsigned int pc_dbreg[32]; \ 63 int pc_dbreg_cmd; \ 64 int pc_bp_harden_kind; \ 65 uint32_t pc_original_actlr; \ 66 char __pad[11] 67#else 68#define PCPU_MD_FIELDS \ 69 char __pad[157] 70#endif 71 72#ifdef _KERNEL 73 74#define PC_DBREG_CMD_NONE 0 75#define PC_DBREG_CMD_LOAD 1 76 77struct pcb; 78struct pcpu; 79 80extern struct pcpu *pcpup; 81 82#if __ARM_ARCH >= 6 83#define CPU_MASK (0xf) 84 85#ifndef SMP 86#define get_pcpu() (pcpup) 87#else 88#define get_pcpu() __extension__ ({ \ 89 int id; \ 90 __asm __volatile("mrc p15, 0, %0, c0, c0, 5" : "=r" (id)); \ 91 (pcpup + (id & CPU_MASK)); \ 92 }) 93#endif 94 95static inline struct thread * 96get_curthread(void) 97{ 98 void *ret; 99 100 __asm __volatile("mrc p15, 0, %0, c13, c0, 4" : "=r" (ret)); 101 return (ret); 102} 103 104static inline void 105set_curthread(struct thread *td) 106{ 107 108 __asm __volatile("mcr p15, 0, %0, c13, c0, 4" : : "r" (td)); 109} 110 111 112static inline void * 113get_tls(void) 114{ 115 void *tls; 116 117 /* TPIDRURW contains the authoritative value. */ 118 __asm __volatile("mrc p15, 0, %0, c13, c0, 2" : "=r" (tls)); 119 return (tls); 120} 121 122static inline void 123set_tls(void *tls) 124{ 125 126 /* 127 * Update both TPIDRURW and TPIDRURO. TPIDRURW needs to be written 128 * first to ensure that a context switch between the two writes will 129 * still give the desired result of updating both. 130 */ 131 __asm __volatile( 132 "mcr p15, 0, %0, c13, c0, 2\n" 133 "mcr p15, 0, %0, c13, c0, 3\n" 134 : : "r" (tls)); 135} 136 137#define curthread get_curthread() 138 139#else 140#define get_pcpu() pcpup 141#endif 142 143#define PCPU_GET(member) (get_pcpu()->pc_ ## member) 144#define PCPU_ADD(member, value) (get_pcpu()->pc_ ## member += (value)) 145#define PCPU_INC(member) PCPU_ADD(member, 1) 146#define PCPU_PTR(member) (&get_pcpu()->pc_ ## member) 147#define PCPU_SET(member,value) (get_pcpu()->pc_ ## member = (value)) 148 149void pcpu0_init(void); 150#endif /* _KERNEL */ 151 152#endif /* !_MACHINE_PCPU_H_ */ 153