cpu.h revision 290614 
1/* $NetBSD: cpu.h,v 1.2 2001/02/23 21:23:52 reinoud Exp $ */
2/* $FreeBSD: head/sys/arm/include/cpu.h 290614 2015-11-09 17:57:32Z bz $ */
3
4#ifndef MACHINE_CPU_H
5#define MACHINE_CPU_H
6
7#include <machine/acle-compat.h>
8#include <machine/armreg.h>
9#include <machine/frame.h>
10
11void	cpu_halt(void);
12void	swi_vm(void *);
13
14#ifdef _KERNEL
15#if __ARM_ARCH >= 6
16#include <machine/cpu-v6.h>
17#ifdef DEV_PMU
18#include <sys/pcpu.h>
19#define	PMU_OVSR_C		0x80000000	/* Cycle Counter */
20extern uint32_t	ccnt_hi[MAXCPU];
21extern int pmu_attched;
22#endif /* DEV_PMU */
23#endif /* __ARM_ARCH >= 6 */
24
25static __inline uint64_t
26get_cyclecount(void)
27{
28#if __ARM_ARCH >= 6
29#if (__ARM_ARCH > 6) && defined(DEV_PMU)
30	if (pmu_attched) {
31		u_int cpu;
32		uint64_t h, h2;
33		uint32_t l, r;
34
35		cpu = PCPU_GET(cpuid);
36		h = (uint64_t)atomic_load_acq_32(&ccnt_hi[cpu]);
37		l = cp15_pmccntr_get();
38		/* In case interrupts are disabled we need to check for overflow. */
39		r = cp15_pmovsr_get();
40		if (r & PMU_OVSR_C) {
41			atomic_add_32(&ccnt_hi[cpu], 1);
42			/* Clear the event. */
43			cp15_pmovsr_set(PMU_OVSR_C);
44		}
45		/* Make sure there was no wrap-around while we read the lo half. */
46		h2 = (uint64_t)atomic_load_acq_32(&ccnt_hi[cpu]);
47		if (h != h2)
48			l = cp15_pmccntr_get();
49		return (h2 << 32 | l);
50	} else
51#endif
52		return cp15_pmccntr_get();
53#else /* No performance counters, so use binuptime(9). This is slooooow */
54	struct bintime bt;
55
56	binuptime(&bt);
57	return ((uint64_t)bt.sec << 56 | bt.frac >> 8);
58#endif
59}
60#endif
61
62#define TRAPF_USERMODE(frame)	((frame->tf_spsr & PSR_MODE) == PSR_USR32_MODE)
63
64#define TRAPF_PC(tfp)		((tfp)->tf_pc)
65
66#define cpu_getstack(td)	((td)->td_frame->tf_usr_sp)
67#define cpu_setstack(td, sp)	((td)->td_frame->tf_usr_sp = (sp))
68#define cpu_spinwait()		/* nothing */
69
70#define ARM_NVEC		8
71#define ARM_VEC_ALL		0xffffffff
72
73extern vm_offset_t vector_page;
74
75/*
76 * Params passed into initarm. If you change the size of this you will
77 * need to update locore.S to allocate more memory on the stack before
78 * it calls initarm.
79 */
80struct arm_boot_params {
81	register_t	abp_size;	/* Size of this structure */
82	register_t	abp_r0;		/* r0 from the boot loader */
83	register_t	abp_r1;		/* r1 from the boot loader */
84	register_t	abp_r2;		/* r2 from the boot loader */
85	register_t	abp_r3;		/* r3 from the boot loader */
86	vm_offset_t	abp_physaddr;	/* The kernel physical address */
87	vm_offset_t	abp_pagetable;	/* The early page table */
88};
89
90void	arm_vector_init(vm_offset_t, int);
91void	fork_trampoline(void);
92void	identify_arm_cpu(void);
93void	*initarm(struct arm_boot_params *);
94
95extern char btext[];
96extern char etext[];
97int badaddr_read(void *, size_t, void *);
98#endif /* !MACHINE_CPU_H */
99