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 static __inline uint64_t 15 get_cyclecount(void) 16 { 17 /* This '#if' asks the question 'Does CP15/SCC include performance counters?' */ 18 #if defined(CPU_ARM1136) || defined(CPU_ARM1176) \ 19 || defined(CPU_MV_PJ4B) \ 20 || defined(CPU_CORTEXA) || defined(CPU_KRAIT) 21 uint32_t ccnt; 22 uint64_t ccnt64; 23 24 /* 25 * Read PMCCNTR. Curses! Its only 32 bits. 26 * TODO: Fix this by catching overflow with interrupt? 27 */ 28 /* The ARMv6 vs ARMv7 divide is going to need a better way of 29 * distinguishing between them. 30 */ 31 #if defined(CPU_ARM1136) || defined(CPU_ARM1176) 32 /* ARMv6 - Earlier model SCCs */ 33 __asm __volatile("mrc p15, 0, %0, c15, c12, 1": "=r" (ccnt)); 34 #else 35 /* ARMv7 - Later model SCCs */ 36 __asm __volatile("mrc p15, 0, %0, c9, c13, 0": "=r" (ccnt)); 37 #endif 38 ccnt64 = (uint64_t)ccnt; 39 return (ccnt64); 40 #else /* No performance counters, so use binuptime(9). This is slooooow */ 41 struct bintime bt; 42 43 binuptime(&bt); 44 return ((uint64_t)bt.sec << 56 | bt.frac >> 8); 45 #endif 46 } 47 #endif 48 49 #define TRAPF_USERMODE(frame) ((frame->tf_spsr & PSR_MODE) == PSR_USR32_MODE) 50 51 #define TRAPF_PC(tfp) ((tfp)->tf_pc) 52 53 #define cpu_getstack(td) ((td)->td_frame->tf_usr_sp) 54 #define cpu_setstack(td, sp) ((td)->td_frame->tf_usr_sp = (sp)) 55 #define cpu_spinwait() /* nothing */ 56 57 #define ARM_NVEC 8 58 #define ARM_VEC_ALL 0xffffffff 59 60 extern vm_offset_t vector_page; 61 62 /* 63 * Params passed into initarm. If you change the size of this you will 64 * need to update locore.S to allocate more memory on the stack before 65 * it calls initarm. 66 */ 67 struct arm_boot_params { 68 register_t abp_size; /* Size of this structure */ 69 register_t abp_r0; /* r0 from the boot loader */ 70 register_t abp_r1; /* r1 from the boot loader */ 71 register_t abp_r2; /* r2 from the boot loader */ 72 register_t abp_r3; /* r3 from the boot loader */ 73 vm_offset_t abp_physaddr; /* The kernel physical address */ 74 vm_offset_t abp_pagetable; /* The early page table */ 75 }; 76 77 void arm_vector_init(vm_offset_t, int); 78 void fork_trampoline(void); 79 void identify_arm_cpu(void); 80 void *initarm(struct arm_boot_params *); 81 82 extern char btext[]; 83 extern char etext[]; 84 int badaddr_read(void *, size_t, void *); 85 #endif /* !MACHINE_CPU_H */ 86