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cpu.h revision 1.1 
      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