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cpu.h revision 1.10 
      1 /* $NetBSD: cpu.h,v 1.10 2023/05/07 12:41:48 skrll 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 
     37 struct clockframe {
     38 	vaddr_t cf_epc;
     39 	register_t cf_status;
     40 	int cf_intr_depth;
     41 };
     42 
     43 #define CLKF_USERMODE(cf)	(((cf)->cf_status & SR_SPP) == 0)
     44 #define CLKF_PC(cf)		((cf)->cf_epc)
     45 #define CLKF_INTR(cf)		((cf)->cf_intr_depth > 0)
     46 
     47 #include <sys/cpu_data.h>
     48 #include <sys/device_if.h>
     49 #include <sys/evcnt.h>
     50 #include <sys/intr.h>
     51 
     52 struct cpu_info {
     53 	struct cpu_data ci_data;
     54 	device_t ci_dev;
     55 	cpuid_t ci_cpuid;
     56 	struct lwp *ci_curlwp;
     57 	struct lwp *ci_onproc;		/* current user LWP / kthread */
     58 	struct lwp *ci_softlwps[SOFTINT_COUNT];
     59 	struct trapframe *ci_ddb_regs;
     60 
     61 	uint64_t ci_lastintr;
     62 	uint64_t ci_lastintr_scheduled;
     63 	struct evcnt ci_ev_timer;
     64 	struct evcnt ci_ev_timer_missed;
     65 
     66 	int ci_mtx_oldspl;
     67 	int ci_mtx_count;
     68 
     69 	int ci_want_resched;
     70 	int ci_cpl;
     71 	u_int ci_softints;
     72 	volatile u_int ci_intr_depth;
     73 
     74 	tlb_asid_t ci_pmap_asid_cur;
     75 
     76 	union pmap_segtab *ci_pmap_user_segtab;
     77 #ifdef _LP64
     78 	union pmap_segtab *ci_pmap_user_seg0tab;
     79 #endif
     80 
     81 	struct evcnt ci_ev_fpu_saves;
     82 	struct evcnt ci_ev_fpu_loads;
     83 	struct evcnt ci_ev_fpu_reenables;
     84 #if defined(GPROF) && defined(MULTIPROCESSOR)
     85 	struct gmonparam *ci_gmon;	/* MI per-cpu GPROF */
     86 #endif
     87 };
     88 
     89 #endif /* _KERNEL || _KMEMUSER */
     90 
     91 #ifdef _KERNEL
     92 
     93 extern struct cpu_info cpu_info_store[];
     94 
     95 // This is also in <sys/lwp.h>
     96 struct lwp;
     97 static inline struct cpu_info *lwp_getcpu(struct lwp *);
     98 
     99 register struct lwp *riscv_curlwp __asm("tp");
    100 #define	curlwp		riscv_curlwp
    101 #define	curcpu()	lwp_getcpu(curlwp)
    102 #define	curpcb		((struct pcb *)lwp_getpcb(curlwp))
    103 
    104 static inline cpuid_t
    105 cpu_number(void)
    106 {
    107 #ifdef MULTIPROCESSOR
    108 	return curcpu()->ci_cpuid;
    109 #else
    110 	return 0;
    111 #endif
    112 }
    113 
    114 void	cpu_proc_fork(struct proc *, struct proc *);
    115 void	cpu_signotify(struct lwp *);
    116 void	cpu_need_proftick(struct lwp *l);
    117 void	cpu_boot_secondary_processors(void);
    118 
    119 #define CPU_INFO_ITERATOR	cpuid_t
    120 #ifdef MULTIPROCESSOR
    121 #define CPU_INFO_FOREACH(cii, ci) \
    122 	(cii) = 0; ((ci) = cpu_infos[cii]) != NULL; (cii)++
    123 #else
    124 #define CPU_INFO_FOREACH(cii, ci) \
    125 	(cii) = 0, (ci) = curcpu(); (cii) == 0; (cii)++
    126 #endif
    127 
    128 #define CPU_INFO_CURPMAP(ci)	(curlwp->l_proc->p_vmspace->vm_map.pmap)
    129 
    130 static inline void
    131 cpu_dosoftints(void)
    132 {
    133 	extern void dosoftints(void);
    134         struct cpu_info * const ci = curcpu();
    135         if (ci->ci_intr_depth == 0
    136 	    && (ci->ci_data.cpu_softints >> ci->ci_cpl) > 0)
    137                 dosoftints();
    138 }
    139 
    140 static inline bool
    141 cpu_intr_p(void)
    142 {
    143 	return curcpu()->ci_intr_depth > 0;
    144 }
    145 
    146 #define LWP_PC(l)	cpu_lwp_pc(l)
    147 
    148 vaddr_t	cpu_lwp_pc(struct lwp *);
    149 
    150 static inline void
    151 cpu_idle(void)
    152 {
    153 	asm volatile("wfi" ::: "memory");
    154 }
    155 
    156 #endif /* _KERNEL */
    157 
    158 #endif /* _RISCV_CPU_H_ */
    159