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cpu.h revision 1.3 
      1 /* $NetBSD: cpu.h,v 1.3 2015/03/31 01:11:41 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 // This is also in <sys/lwp.h>
     85 struct lwp;
     86 static inline struct cpu_info *lwp_getcpu(struct lwp *);
     87 
     88 register struct lwp *riscv_curlwp __asm("tp");
     89 #define	curlwp		riscv_curlwp
     90 #define	curcpu()	lwp_getcpu(curlwp)
     91 
     92 static inline cpuid_t
     93 cpu_number(void)
     94 {
     95 #ifdef MULTIPROCESSOR
     96 	return curcpu()->ci_cpuid;
     97 #else
     98 	return 0;
     99 #endif
    100 }
    101 
    102 void	cpu_set_curpri(int);
    103 void	cpu_proc_fork(struct proc *, struct proc *);
    104 void	cpu_signotify(struct lwp *);
    105 void	cpu_need_proftick(struct lwp *l);
    106 void	cpu_boot_secondary_processors(void);
    107 
    108 #define CPU_INFO_ITERATOR	cpuid_t
    109 #ifdef MULTIPROCESSOR
    110 #define CPU_INFO_FOREACH(cii, ci) \
    111 	(cii) = 0; ((ci) = cpu_infos[cii]) != NULL; (cii)++
    112 #else
    113 #define CPU_INFO_FOREACH(cii, ci) \
    114 	(cii) = 0, (ci) = curcpu(); (cii) == 0; (cii)++
    115 #endif
    116 
    117 #define CPU_INFO_CURPMAP(ci)	(curlwp->l_proc->p_vmspace->vm_map.pmap)
    118 
    119 static inline void
    120 cpu_dosoftints(void)
    121 {
    122 	extern void dosoftints(void);
    123         struct cpu_info * const ci = curcpu();
    124         if (ci->ci_intr_depth == 0
    125 	    && (ci->ci_data.cpu_softints >> ci->ci_cpl) > 0)
    126                 dosoftints();
    127 }
    128 
    129 static inline bool
    130 cpu_intr_p(void)
    131 {
    132 	return curcpu()->ci_intr_depth > 0;
    133 }
    134 
    135 #define LWP_PC(l)	cpu_lwp_pc(l)
    136 
    137 vaddr_t	cpu_lwp_pc(struct lwp *);
    138 
    139 static inline void
    140 cpu_idle(void)
    141 {
    142 }
    143 
    144 #endif /* _KERNEL || _KMEMUSER */
    145 
    146 #endif /* _RISCV_CPU_H_ */
    147