cpu.h revision 295315 
1/* $NetBSD: cpu.h,v 1.2 2001/02/23 21:23:52 reinoud Exp $ */
2/* $FreeBSD: head/sys/arm/include/cpu.h 295315 2016-02-05 09:46:24Z mmel $ */
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#else
18#include <machine/cpu-v4.h>
19#endif /* __ARM_ARCH >= 6 */
20
21static __inline uint64_t
22get_cyclecount(void)
23{
24#if __ARM_ARCH >= 6
25#if (__ARM_ARCH > 6) && defined(DEV_PMU)
26	if (pmu_attched) {
27		u_int cpu;
28		uint64_t h, h2;
29		uint32_t l, r;
30
31		cpu = PCPU_GET(cpuid);
32		h = (uint64_t)atomic_load_acq_32(&ccnt_hi[cpu]);
33		l = cp15_pmccntr_get();
34		/* In case interrupts are disabled we need to check for overflow. */
35		r = cp15_pmovsr_get();
36		if (r & PMU_OVSR_C) {
37			atomic_add_32(&ccnt_hi[cpu], 1);
38			/* Clear the event. */
39			cp15_pmovsr_set(PMU_OVSR_C);
40		}
41		/* Make sure there was no wrap-around while we read the lo half. */
42		h2 = (uint64_t)atomic_load_acq_32(&ccnt_hi[cpu]);
43		if (h != h2)
44			l = cp15_pmccntr_get();
45		return (h2 << 32 | l);
46	} else
47#endif
48		return cp15_pmccntr_get();
49#else /* No performance counters, so use binuptime(9). This is slooooow */
50	struct bintime bt;
51
52	binuptime(&bt);
53	return ((uint64_t)bt.sec << 56 | bt.frac >> 8);
54#endif
55}
56#endif
57
58#define TRAPF_USERMODE(frame)	((frame->tf_spsr & PSR_MODE) == PSR_USR32_MODE)
59
60#define TRAPF_PC(tfp)		((tfp)->tf_pc)
61
62#define cpu_getstack(td)	((td)->td_frame->tf_usr_sp)
63#define cpu_setstack(td, sp)	((td)->td_frame->tf_usr_sp = (sp))
64#define cpu_spinwait()		/* nothing */
65
66#define ARM_NVEC		8
67#define ARM_VEC_ALL		0xffffffff
68
69extern vm_offset_t vector_page;
70
71/*
72 * Params passed into initarm. If you change the size of this you will
73 * need to update locore.S to allocate more memory on the stack before
74 * it calls initarm.
75 */
76struct arm_boot_params {
77	register_t	abp_size;	/* Size of this structure */
78	register_t	abp_r0;		/* r0 from the boot loader */
79	register_t	abp_r1;		/* r1 from the boot loader */
80	register_t	abp_r2;		/* r2 from the boot loader */
81	register_t	abp_r3;		/* r3 from the boot loader */
82	vm_offset_t	abp_physaddr;	/* The kernel physical address */
83	vm_offset_t	abp_pagetable;	/* The early page table */
84};
85
86void	arm_vector_init(vm_offset_t, int);
87void	fork_trampoline(void);
88void	identify_arm_cpu(void);
89void	*initarm(struct arm_boot_params *);
90
91extern char btext[];
92extern char etext[];
93int badaddr_read(void *, size_t, void *);
94#endif /* !MACHINE_CPU_H */
95