cpu.h revision 302408 
1/* $NetBSD: cpu.h,v 1.2 2001/02/23 21:23:52 reinoud Exp $ */
2/* $FreeBSD: stable/11/sys/arm/include/cpu.h 300694 2016-05-25 19:44:26Z ian $ */
3
4#ifndef MACHINE_CPU_H
5#define MACHINE_CPU_H
6
7#include <machine/armreg.h>
8#include <machine/frame.h>
9
10void	cpu_halt(void);
11void	swi_vm(void *);
12
13#ifdef _KERNEL
14#if __ARM_ARCH >= 6
15#include <machine/cpu-v6.h>
16#else
17#include <machine/cpu-v4.h>
18#endif /* __ARM_ARCH >= 6 */
19
20static __inline uint64_t
21get_cyclecount(void)
22{
23#if __ARM_ARCH >= 6
24#if (__ARM_ARCH > 6) && defined(DEV_PMU)
25	if (pmu_attched) {
26		u_int cpu;
27		uint64_t h, h2;
28		uint32_t l, r;
29
30		cpu = PCPU_GET(cpuid);
31		h = (uint64_t)atomic_load_acq_32(&ccnt_hi[cpu]);
32		l = cp15_pmccntr_get();
33		/* In case interrupts are disabled we need to check for overflow. */
34		r = cp15_pmovsr_get();
35		if (r & PMU_OVSR_C) {
36			atomic_add_32(&ccnt_hi[cpu], 1);
37			/* Clear the event. */
38			cp15_pmovsr_set(PMU_OVSR_C);
39		}
40		/* Make sure there was no wrap-around while we read the lo half. */
41		h2 = (uint64_t)atomic_load_acq_32(&ccnt_hi[cpu]);
42		if (h != h2)
43			l = cp15_pmccntr_get();
44		return (h2 << 32 | l);
45	} else
46#endif
47		return cp15_pmccntr_get();
48#else /* No performance counters, so use binuptime(9). This is slooooow */
49	struct bintime bt;
50
51	binuptime(&bt);
52	return ((uint64_t)bt.sec << 56 | bt.frac >> 8);
53#endif
54}
55#endif
56
57#define TRAPF_USERMODE(frame)	((frame->tf_spsr & PSR_MODE) == PSR_USR32_MODE)
58
59#define TRAPF_PC(tfp)		((tfp)->tf_pc)
60
61#define cpu_getstack(td)	((td)->td_frame->tf_usr_sp)
62#define cpu_setstack(td, sp)	((td)->td_frame->tf_usr_sp = (sp))
63#define cpu_spinwait()		/* nothing */
64
65#define ARM_NVEC		8
66#define ARM_VEC_ALL		0xffffffff
67
68extern vm_offset_t vector_page;
69
70/*
71 * Params passed into initarm. If you change the size of this you will
72 * need to update locore.S to allocate more memory on the stack before
73 * it calls initarm.
74 */
75struct arm_boot_params {
76	register_t	abp_size;	/* Size of this structure */
77	register_t	abp_r0;		/* r0 from the boot loader */
78	register_t	abp_r1;		/* r1 from the boot loader */
79	register_t	abp_r2;		/* r2 from the boot loader */
80	register_t	abp_r3;		/* r3 from the boot loader */
81	vm_offset_t	abp_physaddr;	/* The kernel physical address */
82	vm_offset_t	abp_pagetable;	/* The early page table */
83};
84
85void	arm_vector_init(vm_offset_t, int);
86void	fork_trampoline(void);
87void	identify_arm_cpu(void);
88void	*initarm(struct arm_boot_params *);
89
90extern char btext[];
91extern char etext[];
92int badaddr_read(void *, size_t, void *);
93#endif /* !MACHINE_CPU_H */
94