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 * $FreeBSD$ 28 */ 29 30 #ifndef _MACHINE_PCPU_H_ 31 #define _MACHINE_PCPU_H_ 32 33 #ifdef _KERNEL 34 35 #define ALT_STACK_SIZE 128 36 37 struct vmspace; 38 39 #endif /* _KERNEL */ 40 41 #if __ARM_ARCH >= 6 42 #define PCPU_MD_FIELDS \ 43 unsigned int pc_vfpsid; \ 44 unsigned int pc_vfpmvfr0; \ 45 unsigned int pc_vfpmvfr1; \ 46 struct pmap *pc_curpmap; \ 47 vm_offset_t pc_qmap_addr; \ 48 void *pc_qmap_pte; \ 49 unsigned int pc_dbreg[32]; \ 50 int pc_dbreg_cmd; \ 51 char __pad[1] 52 #else 53 #define PCPU_MD_FIELDS \ 54 vm_offset_t qmap_addr; \ 55 void *pc_qmap_pte; \ 56 char __pad[149] 57 #endif 58 59 #ifdef _KERNEL 60 61 #define PC_DBREG_CMD_NONE 0 62 #define PC_DBREG_CMD_LOAD 1 63 64 struct pcb; 65 struct pcpu; 66 67 extern struct pcpu *pcpup; 68 69 #if __ARM_ARCH >= 6 70 #define CPU_MASK (0xf) 71 72 #ifndef SMP 73 #define get_pcpu() (pcpup) 74 #else 75 #define get_pcpu() __extension__ ({ \ 76 int id; \ 77 __asm __volatile("mrc p15, 0, %0, c0, c0, 5" : "=r" (id)); \ 78 (pcpup + (id & CPU_MASK)); \ 79 }) 80 #endif 81 82 static inline struct thread * 83 get_curthread(void) 84 { 85 void *ret; 86 87 __asm __volatile("mrc p15, 0, %0, c13, c0, 4" : "=r" (ret)); 88 return (ret); 89 } 90 91 static inline void 92 set_curthread(struct thread *td) 93 { 94 95 __asm __volatile("mcr p15, 0, %0, c13, c0, 4" : : "r" (td)); 96 } 97 98 99 static inline void * 100 get_tls(void) 101 { 102 void *tls; 103 104 /* TPIDRURW contains the authoritative value. */ 105 __asm __volatile("mrc p15, 0, %0, c13, c0, 2" : "=r" (tls)); 106 return (tls); 107 } 108 109 static inline void 110 set_tls(void *tls) 111 { 112 113 /* 114 * Update both TPIDRURW and TPIDRURO. TPIDRURW needs to be written 115 * first to ensure that a context switch between the two writes will 116 * still give the desired result of updating both. 117 */ 118 __asm __volatile( 119 "mcr p15, 0, %0, c13, c0, 2\n" 120 "mcr p15, 0, %0, c13, c0, 3\n" 121 : : "r" (tls)); 122 } 123 124 #define curthread get_curthread() 125 126 #else 127 #define get_pcpu() pcpup 128 #endif 129 130 #define PCPU_GET(member) (get_pcpu()->pc_ ## member) 131 #define PCPU_ADD(member, value) (get_pcpu()->pc_ ## member += (value)) 132 #define PCPU_INC(member) PCPU_ADD(member, 1) 133 #define PCPU_PTR(member) (&get_pcpu()->pc_ ## member) 134 #define PCPU_SET(member,value) (get_pcpu()->pc_ ## member = (value)) 135 136 void pcpu0_init(void); 137 #endif /* _KERNEL */ 138 139 #endif /* !_MACHINE_PCPU_H_ */ 140