1 /* $NetBSD: cpu.h,v 1.1 2014/09/19 17:36:26 matt Exp $ */ 2 3 /*- 4 * Copyright (c) 2014 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Matt Thomas of 3am Software Foundry. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef _RISCV_CPU_H_ 33 #define _RISCV_CPU_H_ 34 35 #if defined(_KERNEL) || defined(_KMEMUSER) 36 struct clockframe { 37 uintptr_t cf_pc; 38 uint32_t cf_sr; 39 int cf_intr_depth; 40 }; 41 42 #define CLKF_USERMODE(cf) (((cf)->cf_sr & 1) == 0) 43 #define CLKF_PC(cf) ((cf)->cf_pc) 44 #define CLKF_INTR(cf) ((cf)->cf_intr_depth > 0) 45 46 #include <sys/cpu_data.h> 47 #include <sys/device_if.h> 48 #include <sys/evcnt.h> 49 #include <sys/intr.h> 50 51 struct cpu_info { 52 struct cpu_data ci_data; 53 device_t ci_dev; 54 cpuid_t ci_cpuid; 55 struct lwp *ci_curlwp; 56 struct lwp *ci_softlwps[SOFTINT_COUNT]; 57 struct trapframe *ci_ddb_regs; 58 59 uint64_t ci_lastintr; 60 61 int ci_mtx_oldspl; 62 int ci_mtx_count; 63 64 int ci_want_resched; 65 int ci_cpl; 66 u_int ci_softints; 67 volatile u_int ci_intr_depth; 68 69 tlb_asid_t ci_pmap_asid_cur; 70 #if 0 71 union pmap_pdetab *ci_pmap_user_pdetab; 72 #ifdef _LP64 73 union pmap_pdetab *ci_pmap_user_pde0tab; 74 #endif 75 #endif 76 77 struct evcnt ci_ev_fpu_saves; 78 struct evcnt ci_ev_fpu_loads; 79 struct evcnt ci_ev_fpu_reenables; 80 }; 81 82 extern struct cpu_info cpu_info_store; 83 84 register struct lwp *riscv_curlwp __asm("x15"); 85 #define curlwp riscv_curlwp 86 87 static inline struct cpu_info * 88 curcpu(void) 89 { 90 struct cpu_info *ci; 91 __asm("csrr\t%0, sup0" : "=r"(ci)); 92 return ci; 93 } 94 95 static inline cpuid_t 96 cpu_number(void) 97 { 98 #ifdef MULTIPROCESSOR 99 return curcpu()->ci_cpuid; 100 #else 101 return 0; 102 #endif 103 } 104 105 void cpu_set_curpri(int); 106 void cpu_proc_fork(struct proc *, struct proc *); 107 void cpu_signotify(struct lwp *); 108 void cpu_need_proftick(struct lwp *l); 109 void cpu_boot_secondary_processors(void); 110 111 #define CPU_INFO_ITERATOR cpuid_t 112 #ifdef MULTIPROCESSOR 113 #define CPU_INFO_FOREACH(cii, ci) \ 114 (cii) = 0; ((ci) = cpu_infos[cii]) != NULL; (cii)++ 115 #else 116 #define CPU_INFO_FOREACH(cii, ci) \ 117 (cii) = 0, (ci) = curcpu(); (cii) == 0; (cii)++ 118 #endif 119 120 #define CPU_INFO_CURPMAP(ci) (curlwp->l_proc->p_vmspace->vm_map.pmap) 121 122 static inline void 123 cpu_dosoftints(void) 124 { 125 extern void dosoftints(void); 126 struct cpu_info * const ci = curcpu(); 127 if (ci->ci_intr_depth == 0 128 && (ci->ci_data.cpu_softints >> ci->ci_cpl) > 0) 129 dosoftints(); 130 } 131 132 static inline bool 133 cpu_intr_p(void) 134 { 135 return curcpu()->ci_intr_depth > 0; 136 } 137 138 #define LWP_PC(l) cpu_lwp_pc(l) 139 140 vaddr_t cpu_lwp_pc(struct lwp *); 141 142 static inline void 143 cpu_idle(void) 144 { 145 } 146 147 #endif /* _KERNEL || _KMEMUSER */ 148 149 #endif /* _RISCV_CPU_H_ */ 150