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 <sys/_lock.h> 36 #include <sys/_mutex.h> 37 38 #define ALT_STACK_SIZE 128 39 40 struct vmspace; 41 42 #endif /* _KERNEL */ 43 44 #if __ARM_ARCH >= 6 45 46 #define PCPU_MD_FIELDS \ 47 unsigned int pc_vfpsid; \ 48 unsigned int pc_vfpmvfr0; \ 49 unsigned int pc_vfpmvfr1; \ 50 struct pmap *pc_curpmap; \ 51 struct mtx pc_cmap_lock; \ 52 void *pc_cmap1_pte2p; \ 53 void *pc_cmap2_pte2p; \ 54 caddr_t pc_cmap1_addr; \ 55 caddr_t pc_cmap2_addr; \ 56 vm_offset_t pc_qmap_addr; \ 57 void *pc_qmap_pte2p; \ 58 unsigned int pc_dbreg[32]; \ 59 int pc_dbreg_cmd; \ 60 char __pad[155] 61 #else 62 #define PCPU_MD_FIELDS \ 63 char __pad[93] 64 #endif 65 66 #ifdef _KERNEL 67 68 #define PC_DBREG_CMD_NONE 0 69 #define PC_DBREG_CMD_LOAD 1 70 71 struct pcb; 72 struct pcpu; 73 74 extern struct pcpu *pcpup; 75 76 #if __ARM_ARCH >= 6 77 #define CPU_MASK (0xf) 78 79 #ifndef SMP 80 #define get_pcpu() (pcpup) 81 #else 82 #define get_pcpu() __extension__ ({ \ 83 int id; \ 84 __asm __volatile("mrc p15, 0, %0, c0, c0, 5" : "=r" (id)); \ 85 (pcpup + (id & CPU_MASK)); \ 86 }) 87 #endif 88 89 static inline struct thread * 90 get_curthread(void) 91 { 92 void *ret; 93 94 __asm __volatile("mrc p15, 0, %0, c13, c0, 4" : "=r" (ret)); 95 return (ret); 96 } 97 98 static inline void 99 set_curthread(struct thread *td) 100 { 101 102 __asm __volatile("mcr p15, 0, %0, c13, c0, 4" : : "r" (td)); 103 } 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 #else 134 #define get_pcpu() pcpup 135 #endif 136 137 #define PCPU_GET(member) (get_pcpu()->pc_ ## member) 138 #define PCPU_ADD(member, value) (get_pcpu()->pc_ ## member += (value)) 139 #define PCPU_INC(member) PCPU_ADD(member, 1) 140 #define PCPU_PTR(member) (&get_pcpu()->pc_ ## member) 141 #define PCPU_SET(member,value) (get_pcpu()->pc_ ## member = (value)) 142 143 void pcpu0_init(void); 144 #endif /* _KERNEL */ 145 146 #endif /* !_MACHINE_PCPU_H_ */ 147