The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/arm/include/cpu.h

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    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 #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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