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_pte; \ 58 unsigned int pc_dbreg[32]; \ 59 int pc_dbreg_cmd; \ 60 char __pad[27] 61 #else 62 #define PCPU_MD_FIELDS \ 63 vm_offset_t qmap_addr; \ 64 void *pc_qmap_pte; \ 65 char __pad[149] 66 #endif 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 #if __ARM_ARCH >= 6 79 #define CPU_MASK (0xf) 80 81 #ifndef SMP 82 #define get_pcpu() (pcpup) 83 #else 84 #define get_pcpu() __extension__ ({ \ 85 int id; \ 86 __asm __volatile("mrc p15, 0, %0, c0, c0, 5" : "=r" (id)); \ 87 (pcpup + (id & CPU_MASK)); \ 88 }) 89 #endif 90 91 static inline struct thread * 92 get_curthread(void) 93 { 94 void *ret; 95 96 __asm __volatile("mrc p15, 0, %0, c13, c0, 4" : "=r" (ret)); 97 return (ret); 98 } 99 100 static inline void 101 set_curthread(struct thread *td) 102 { 103 104 __asm __volatile("mcr p15, 0, %0, c13, c0, 4" : : "r" (td)); 105 } 106 107 108 static inline void * 109 get_tls(void) 110 { 111 void *tls; 112 113 /* TPIDRURW contains the authoritative value. */ 114 __asm __volatile("mrc p15, 0, %0, c13, c0, 2" : "=r" (tls)); 115 return (tls); 116 } 117 118 static inline void 119 set_tls(void *tls) 120 { 121 122 /* 123 * Update both TPIDRURW and TPIDRURO. TPIDRURW needs to be written 124 * first to ensure that a context switch between the two writes will 125 * still give the desired result of updating both. 126 */ 127 __asm __volatile( 128 "mcr p15, 0, %0, c13, c0, 2\n" 129 "mcr p15, 0, %0, c13, c0, 3\n" 130 : : "r" (tls)); 131 } 132 133 #define curthread get_curthread() 134 135 #else 136 #define get_pcpu() pcpup 137 #endif 138 139 #define PCPU_GET(member) (get_pcpu()->pc_ ## member) 140 #define PCPU_ADD(member, value) (get_pcpu()->pc_ ## member += (value)) 141 #define PCPU_INC(member) PCPU_ADD(member, 1) 142 #define PCPU_PTR(member) (&get_pcpu()->pc_ ## member) 143 #define PCPU_SET(member,value) (get_pcpu()->pc_ ## member = (value)) 144 145 void pcpu0_init(void); 146 #endif /* _KERNEL */ 147 148 #endif /* !_MACHINE_PCPU_H_ */ 149