FreeBSD/Linux Kernel Cross Reference
sys/arm/include/cpu.h
1 /* $NetBSD: cpu.h,v 1.2 2001/02/23 21:23:52 reinoud Exp $ */
2 /* $FreeBSD: releng/12.0/sys/arm/include/cpu.h 340269 2018-11-08 22:39:38Z jhb $ */
3
4 #ifndef MACHINE_CPU_H
5 #define MACHINE_CPU_H
6
7 #include <machine/armreg.h>
8 #include <machine/frame.h>
9
10 void cpu_halt(void);
11 void 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
20 static __inline uint64_t
21 get_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 #define cpu_lock_delay() DELAY(1)
65
66 #define ARM_NVEC 8
67 #define ARM_VEC_ALL 0xffffffff
68
69 extern 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 */
76 struct 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
86 void arm_vector_init(vm_offset_t, int);
87 void fork_trampoline(void);
88 void identify_arm_cpu(void);
89 void *initarm(struct arm_boot_params *);
90
91 extern char btext[];
92 extern char etext[];
93 int badaddr_read(void *, size_t, void *);
94 #endif /* !MACHINE_CPU_H */
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