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cpu.h revision 1.52 
      1 /* $NetBSD: cpu.h,v 1.52 2024/12/10 11:27:28 jmcneill Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2014, 2020 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 _AARCH64_CPU_H_
     33 #define _AARCH64_CPU_H_
     34 
     35 #include <arm/cpu.h>
     36 
     37 #ifdef __aarch64__
     38 
     39 #ifdef _KERNEL_OPT
     40 #include "opt_gprof.h"
     41 #include "opt_multiprocessor.h"
     42 #include "opt_pmap.h"
     43 #endif
     44 
     45 #include <sys/param.h>
     46 
     47 #if defined(_KERNEL) || defined(_KMEMUSER)
     48 #include <sys/evcnt.h>
     49 
     50 #include <aarch64/armreg.h>
     51 #include <aarch64/frame.h>
     52 
     53 struct clockframe {
     54 	struct trapframe cf_tf;
     55 };
     56 
     57 /* (spsr & 15) == SPSR_M_EL0T(64bit,0) or USER(32bit,0) */
     58 #define CLKF_USERMODE(cf)	((((cf)->cf_tf.tf_spsr) & 0x0f) == 0)
     59 #define CLKF_PC(cf)		((cf)->cf_tf.tf_pc)
     60 #define CLKF_INTR(cf)		((void)(cf), curcpu()->ci_intr_depth > 1)
     61 
     62 /*
     63  * LWP_PC: Find out the program counter for the given lwp.
     64  */
     65 #define LWP_PC(l)		((l)->l_md.md_utf->tf_pc)
     66 
     67 #include <sys/cpu_data.h>
     68 #include <sys/device_if.h>
     69 #include <sys/intr.h>
     70 
     71 struct aarch64_cpufuncs {
     72 	void (*cf_set_ttbr0)(uint64_t);
     73 	void (*cf_icache_sync_range)(vaddr_t, vsize_t);
     74 };
     75 
     76 #define MAX_CACHE_LEVEL	8		/* ARMv8 has maximum 8 level cache */
     77 
     78 struct aarch64_cache_unit {
     79 	u_int cache_type;
     80 #define CACHE_TYPE_VPIPT	0	/* VMID-aware PIPT */
     81 #define CACHE_TYPE_VIVT		1	/* ASID-tagged VIVT */
     82 #define CACHE_TYPE_VIPT		2
     83 #define CACHE_TYPE_PIPT		3
     84 	u_int cache_line_size;
     85 	u_int cache_ways;
     86 	u_int cache_sets;
     87 	u_int cache_way_size;
     88 	u_int cache_size;
     89 };
     90 
     91 struct aarch64_cache_info {
     92 	u_int cacheable;
     93 #define CACHE_CACHEABLE_NONE	0
     94 #define CACHE_CACHEABLE_ICACHE	1	/* instruction cache only */
     95 #define CACHE_CACHEABLE_DCACHE	2	/* data cache only */
     96 #define CACHE_CACHEABLE_IDCACHE	3	/* instruction and data caches */
     97 #define CACHE_CACHEABLE_UNIFIED	4	/* unified cache */
     98 	struct aarch64_cache_unit icache;
     99 	struct aarch64_cache_unit dcache;
    100 };
    101 
    102 struct cpu_info {
    103 	struct cpu_data ci_data;
    104 	device_t ci_dev;
    105 	cpuid_t ci_cpuid;
    106 
    107 	/*
    108 	 * the following are in their own cache line, as they are stored to
    109 	 * regularly by remote CPUs; when they were mixed with other fields
    110 	 * we observed frequent cache misses.
    111 	 */
    112 	int ci_want_resched __aligned(COHERENCY_UNIT);
    113 	/* XXX pending IPIs? */
    114 
    115 	/*
    116 	 * this is stored frequently, and is fetched by remote CPUs.
    117 	 */
    118 	struct lwp *ci_curlwp __aligned(COHERENCY_UNIT);
    119 	struct lwp *ci_onproc;
    120 
    121 	/*
    122 	 * largely CPU-private.
    123 	 */
    124 	struct lwp *ci_softlwps[SOFTINT_COUNT] __aligned(COHERENCY_UNIT);
    125 
    126 	uint64_t ci_lastintr;
    127 
    128 	int ci_mtx_oldspl;
    129 	int ci_mtx_count;
    130 
    131 	int ci_cpl;		/* current processor level (spl) */
    132 	volatile int ci_hwpl;	/* current hardware priority */
    133 	volatile u_int ci_softints;
    134 	volatile u_int ci_intr_depth;
    135 	volatile uint32_t ci_blocked_pics;
    136 	volatile uint32_t ci_pending_pics;
    137 	volatile uint32_t ci_pending_ipls;
    138 
    139 	int ci_kfpu_spl;
    140 
    141 #if defined(PMAP_MI)
    142         struct pmap_tlb_info *ci_tlb_info;
    143         struct pmap *ci_pmap_lastuser;
    144         struct pmap *ci_pmap_cur;
    145 #endif
    146 
    147 	/* ASID of current pmap */
    148 	tlb_asid_t ci_pmap_asid_cur;
    149 
    150 	/* event counters */
    151 	struct evcnt ci_vfp_use;
    152 	struct evcnt ci_vfp_reuse;
    153 	struct evcnt ci_vfp_save;
    154 	struct evcnt ci_vfp_release;
    155 	struct evcnt ci_uct_trap;
    156 	struct evcnt ci_intr_preempt;
    157 	struct evcnt ci_rndrrs_fail;
    158 
    159 	/* FDT or similar supplied "cpu capacity" */
    160 	uint32_t ci_capacity_dmips_mhz;
    161 
    162 	/* interrupt controller */
    163 	u_int ci_gic_redist;	/* GICv3 redistributor index */
    164 	uint64_t ci_gic_sgir;	/* GICv3 SGIR target */
    165 
    166 	/* ACPI */
    167 	uint32_t ci_acpiid;	/* ACPI Processor Unique ID */
    168 
    169 	/* cached system registers */
    170 	uint64_t ci_sctlr_el1;
    171 	uint64_t ci_sctlr_el2;
    172 
    173 	/* sysctl(9) exposed system registers */
    174 	struct aarch64_sysctl_cpu_id ci_id;
    175 #define ci_midr		ci_id.ac_midr
    176 
    177 	/* cache information and function pointers */
    178 	struct aarch64_cache_info ci_cacheinfo[MAX_CACHE_LEVEL];
    179 	struct aarch64_cpufuncs ci_cpufuncs;
    180 
    181 #if defined(GPROF) && defined(MULTIPROCESSOR)
    182 	struct gmonparam *ci_gmon;	/* MI per-cpu GPROF */
    183 #endif
    184 } __aligned(COHERENCY_UNIT);
    185 
    186 #ifdef _KERNEL
    187 static inline __always_inline struct lwp * __attribute__ ((const))
    188 aarch64_curlwp(void)
    189 {
    190 	struct lwp *l;
    191 	__asm("mrs %0, tpidr_el1" : "=r"(l));
    192 	return l;
    193 }
    194 
    195 /* forward declaration; defined in sys/lwp.h. */
    196 static __inline struct cpu_info *lwp_getcpu(struct lwp *);
    197 
    198 #define	curcpu()		(lwp_getcpu(aarch64_curlwp()))
    199 #define	setsoftast(ci)		(cpu_signotify((ci)->ci_onproc))
    200 #undef curlwp
    201 #define	curlwp			(aarch64_curlwp())
    202 #define	curpcb			((struct pcb *)lwp_getpcb(curlwp))
    203 
    204 void	cpu_signotify(struct lwp *l);
    205 void	cpu_need_proftick(struct lwp *l);
    206 
    207 void	cpu_hatch(struct cpu_info *);
    208 
    209 extern struct cpu_info *cpu_info[];
    210 extern struct cpu_info cpu_info_store[];
    211 
    212 #define CPU_INFO_ITERATOR	int
    213 #if defined(MULTIPROCESSOR) || defined(_MODULE)
    214 #define cpu_number()		(curcpu()->ci_index)
    215 #define CPU_IS_PRIMARY(ci)	((ci)->ci_index == 0)
    216 #define CPU_INFO_FOREACH(cii, ci)					\
    217 	cii = 0, ci = cpu_info[0];					\
    218 	cii < (ncpu ? ncpu : 1) && (ci = cpu_info[cii]) != NULL;	\
    219 	cii++
    220 #else /* MULTIPROCESSOR */
    221 #define cpu_number()		0
    222 #define CPU_IS_PRIMARY(ci)	true
    223 #define CPU_INFO_FOREACH(cii, ci)					\
    224 	cii = 0, __USE(cii), ci = curcpu(); ci != NULL; ci = NULL
    225 #endif /* MULTIPROCESSOR */
    226 
    227 #define	LWP0_CPU_INFO	(&cpu_info_store[0])
    228 
    229 #define	__HAVE_CPU_DOSOFTINTS_CI
    230 
    231 static inline void
    232 cpu_dosoftints_ci(struct cpu_info *ci)
    233 {
    234 #if defined(__HAVE_FAST_SOFTINTS) && !defined(__HAVE_PIC_FAST_SOFTINTS)
    235 	void dosoftints(void);
    236 
    237 	if (ci->ci_intr_depth == 0 && (ci->ci_softints >> ci->ci_cpl) > 0) {
    238 		dosoftints();
    239 	}
    240 #endif
    241 }
    242 
    243 static inline void
    244 cpu_dosoftints(void)
    245 {
    246 #if defined(__HAVE_FAST_SOFTINTS) && !defined(__HAVE_PIC_FAST_SOFTINTS)
    247 	KDASSERT(kpreempt_disabled());
    248 	cpu_dosoftints_ci(curcpu());
    249 #endif
    250 }
    251 
    252 struct cpufeature_attach_args {
    253 	struct cpu_info *ci;
    254 };
    255 
    256 #endif /* _KERNEL */
    257 
    258 #endif /* _KERNEL || _KMEMUSER */
    259 
    260 #endif
    261 
    262 #endif /* _AARCH64_CPU_H_ */
    263