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freebsd/sys/arm/include/cpu.h
Michael Tuexen 2ff25a8b1c Different versions of the ARM processor use different registers.
Fix the code used on a Raspberry Pi.

Reviewed by: markm@
2014-06-17 21:48:04 +00:00

86 lines
2.3 KiB
C

/* $NetBSD: cpu.h,v 1.2 2001/02/23 21:23:52 reinoud Exp $ */
/* $FreeBSD$ */
#ifndef MACHINE_CPU_H
#define MACHINE_CPU_H
#include <machine/armreg.h>
#include <machine/frame.h>
void cpu_halt(void);
void swi_vm(void *);
#ifdef _KERNEL
static __inline uint64_t
get_cyclecount(void)
{
/* This '#if' asks the question 'Does CP15/SCC include performance counters?' */
#if defined(CPU_ARM1136) || defined(CPU_ARM1176) \
|| defined(CPU_MV_PJ4B) \
|| defined(CPU_CORTEXA) || defined(CPU_KRAIT)
uint32_t ccnt;
uint64_t ccnt64;
/*
* Read PMCCNTR. Curses! Its only 32 bits.
* TODO: Fix this by catching overflow with interrupt?
*/
/* The ARMv6 vs ARMv7 divide is going to need a better way of
* distinguishing between them.
*/
#if defined(CPU_ARM1136) || defined(CPU_ARM1176)
/* ARMv6 - Earlier model SCCs */
__asm __volatile("mrc p15, 0, %0, c15, c12, 1": "=r" (ccnt));
#else
/* ARMv7 - Later model SCCs */
__asm __volatile("mrc p15, 0, %0, c9, c13, 0": "=r" (ccnt));
#endif
ccnt64 = (uint64_t)ccnt;
return (ccnt64);
#else /* No performance counters, so use binuptime(9). This is slooooow */
struct bintime bt;
binuptime(&bt);
return ((uint64_t)bt.sec << 56 | bt.frac >> 8);
#endif
}
#endif
#define TRAPF_USERMODE(frame) ((frame->tf_spsr & PSR_MODE) == PSR_USR32_MODE)
#define TRAPF_PC(tfp) ((tfp)->tf_pc)
#define cpu_getstack(td) ((td)->td_frame->tf_usr_sp)
#define cpu_setstack(td, sp) ((td)->td_frame->tf_usr_sp = (sp))
#define cpu_spinwait() /* nothing */
#define ARM_NVEC 8
#define ARM_VEC_ALL 0xffffffff
extern vm_offset_t vector_page;
/*
* Params passed into initarm. If you change the size of this you will
* need to update locore.S to allocate more memory on the stack before
* it calls initarm.
*/
struct arm_boot_params {
register_t abp_size; /* Size of this structure */
register_t abp_r0; /* r0 from the boot loader */
register_t abp_r1; /* r1 from the boot loader */
register_t abp_r2; /* r2 from the boot loader */
register_t abp_r3; /* r3 from the boot loader */
vm_offset_t abp_physaddr; /* The kernel physical address */
vm_offset_t abp_pagetable; /* The early page table */
};
void arm_vector_init(vm_offset_t, int);
void fork_trampoline(void);
void identify_arm_cpu(void);
void *initarm(struct arm_boot_params *);
extern char btext[];
extern char etext[];
int badaddr_read(void *, size_t, void *);
#endif /* !MACHINE_CPU_H */