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 #include <machine/cpuconf.h> 36 37 #define ALT_STACK_SIZE 128 38 39 struct vmspace; 40 41 #endif /* _KERNEL */ 42 43 #if __ARM_ARCH >= 6 44 #define PCPU_MD_FIELDS \ 45 unsigned int pc_vfpsid; \ 46 unsigned int pc_vfpmvfr0; \ 47 unsigned int pc_vfpmvfr1; \ 48 struct pmap *pc_curpmap; \ 49 vm_offset_t pc_qmap_addr; \ 50 void *pc_qmap_pte; \ 51 unsigned int pc_dbreg[32]; \ 52 int pc_dbreg_cmd; \ 53 char __pad[1] 54 #else 55 #define PCPU_MD_FIELDS \ 56 vm_offset_t qmap_addr; \ 57 void *pc_qmap_pte; \ 58 char __pad[149] 59 #endif 60 61 #ifdef _KERNEL 62 63 #define PC_DBREG_CMD_NONE 0 64 #define PC_DBREG_CMD_LOAD 1 65 66 struct pcb; 67 struct pcpu; 68 69 extern struct pcpu *pcpup; 70 71 #if __ARM_ARCH >= 6 72 #define CPU_MASK (0xf) 73 74 #ifndef SMP 75 #define get_pcpu() (pcpup) 76 #else 77 #define get_pcpu() __extension__ ({ \ 78 int id; \ 79 __asm __volatile("mrc p15, 0, %0, c0, c0, 5" : "=r" (id)); \ 80 (pcpup + (id & CPU_MASK)); \ 81 }) 82 #endif 83 84 static inline struct thread * 85 get_curthread(void) 86 { 87 void *ret; 88 89 __asm __volatile("mrc p15, 0, %0, c13, c0, 4" : "=r" (ret)); 90 return (ret); 91 } 92 93 static inline void 94 set_curthread(struct thread *td) 95 { 96 97 __asm __volatile("mcr p15, 0, %0, c13, c0, 4" : : "r" (td)); 98 } 99 100 101 static inline void * 102 get_tls(void) 103 { 104 void *tls; 105 106 /* TPIDRURW contains the authoritative value. */ 107 __asm __volatile("mrc p15, 0, %0, c13, c0, 2" : "=r" (tls)); 108 return (tls); 109 } 110 111 static inline void 112 set_tls(void *tls) 113 { 114 115 /* 116 * Update both TPIDRURW and TPIDRURO. TPIDRURW needs to be written 117 * first to ensure that a context switch between the two writes will 118 * still give the desired result of updating both. 119 */ 120 __asm __volatile( 121 "mcr p15, 0, %0, c13, c0, 2\n" 122 "mcr p15, 0, %0, c13, c0, 3\n" 123 : : "r" (tls)); 124 } 125 126 #define curthread get_curthread() 127 128 #else 129 #define get_pcpu() pcpup 130 #endif 131 132 #define PCPU_GET(member) (get_pcpu()->pc_ ## member) 133 #define PCPU_ADD(member, value) (get_pcpu()->pc_ ## member += (value)) 134 #define PCPU_INC(member) PCPU_ADD(member, 1) 135 #define PCPU_PTR(member) (&get_pcpu()->pc_ ## member) 136 #define PCPU_SET(member,value) (get_pcpu()->pc_ ## member = (value)) 137 138 void pcpu0_init(void); 139 #endif /* _KERNEL */ 140 141 #endif /* !_MACHINE_PCPU_H_ */ 142