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 /* $FreeBSD$ */
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 #include <machine/cpu-v6.h>
15
16 static __inline uint64_t
17 get_cyclecount(void)
18 {
19 #if __ARM_ARCH > 6 || (__ARM_ARCH == 6 && defined(CPU_ARM1176))
20 #if (__ARM_ARCH > 6) && defined(DEV_PMU)
21 if (pmu_attched) {
22 u_int cpu;
23 uint64_t h, h2;
24 uint32_t l, r;
25
26 cpu = PCPU_GET(cpuid);
27 h = (uint64_t)atomic_load_acq_32(&ccnt_hi[cpu]);
28 l = cp15_pmccntr_get();
29 /* In case interrupts are disabled we need to check for overflow. */
30 r = cp15_pmovsr_get();
31 if (r & PMU_OVSR_C) {
32 atomic_add_32(&ccnt_hi[cpu], 1);
33 /* Clear the event. */
34 cp15_pmovsr_set(PMU_OVSR_C);
35 }
36 /* Make sure there was no wrap-around while we read the lo half. */
37 h2 = (uint64_t)atomic_load_acq_32(&ccnt_hi[cpu]);
38 if (h != h2)
39 l = cp15_pmccntr_get();
40 return (h2 << 32 | l);
41 } else
42 #endif
43 return cp15_pmccntr_get();
44 #else /* No performance counters, so use binuptime(9). This is slooooow */
45 struct bintime bt;
46
47 binuptime(&bt);
48 return ((uint64_t)bt.sec << 56 | bt.frac >> 8);
49 #endif
50 }
51 #endif
52
53 #define TRAPF_USERMODE(frame) ((frame->tf_spsr & PSR_MODE) == PSR_USR32_MODE)
54
55 #define TRAPF_PC(tfp) ((tfp)->tf_pc)
56
57 #define cpu_getstack(td) ((td)->td_frame->tf_usr_sp)
58 #define cpu_setstack(td, sp) ((td)->td_frame->tf_usr_sp = (sp))
59 #define cpu_spinwait() /* nothing */
60 #define cpu_lock_delay() DELAY(1)
61
62 #define ARM_NVEC 8
63 #define ARM_VEC_ALL 0xffffffff
64
65 extern vm_offset_t vector_page;
66
67 /*
68 * Params passed into initarm. If you change the size of this you will
69 * need to update locore.S to allocate more memory on the stack before
70 * it calls initarm.
71 */
72 struct arm_boot_params {
73 register_t abp_size; /* Size of this structure */
74 register_t abp_r0; /* r0 from the boot loader */
75 register_t abp_r1; /* r1 from the boot loader */
76 register_t abp_r2; /* r2 from the boot loader */
77 register_t abp_r3; /* r3 from the boot loader */
78 vm_offset_t abp_physaddr; /* The kernel physical address */
79 vm_offset_t abp_pagetable; /* The early page table */
80 };
81
82 void arm_vector_init(vm_offset_t, int);
83 void fork_trampoline(void);
84 void identify_arm_cpu(void);
85 void *initarm(struct arm_boot_params *);
86
87 extern char btext[];
88 extern char etext[];
89 int badaddr_read(void *, size_t, void *);
90 #endif /* !MACHINE_CPU_H */
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