1 #ifndef _ASMARM_PROCESSOR_H_ 2 #define _ASMARM_PROCESSOR_H_ 3 /* 4 * Copyright (C) 2014, Red Hat Inc, Andrew Jones <drjones@redhat.com> 5 * 6 * This work is licensed under the terms of the GNU LGPL, version 2. 7 */ 8 #include <asm/ptrace.h> 9 #include <asm/sysreg.h> 10 #include <asm/barrier.h> 11 12 enum vector { 13 EXCPTN_RST, 14 EXCPTN_UND, 15 EXCPTN_SVC, 16 EXCPTN_PABT, 17 EXCPTN_DABT, 18 EXCPTN_ADDREXCPTN, 19 EXCPTN_IRQ, 20 EXCPTN_FIQ, 21 EXCPTN_MAX, 22 }; 23 24 typedef void (*irq_handler_fn)(struct pt_regs *regs); 25 typedef void (*exception_fn)(struct pt_regs *); 26 27 extern void install_exception_handler(enum vector v, exception_fn fn); 28 29 extern void show_regs(struct pt_regs *regs); 30 31 static inline unsigned long current_cpsr(void) 32 { 33 unsigned long cpsr; 34 asm volatile("mrs %0, cpsr" : "=r" (cpsr)); 35 return cpsr; 36 } 37 38 #define current_mode() (current_cpsr() & MODE_MASK) 39 40 static inline void local_irq_enable(void) 41 { 42 asm volatile("cpsie i" : : : "memory", "cc"); 43 } 44 45 static inline void local_irq_disable(void) 46 { 47 asm volatile("cpsid i" : : : "memory", "cc"); 48 } 49 50 #define MPIDR __ACCESS_CP15(c0, 0, c0, 5) 51 static inline uint64_t get_mpidr(void) 52 { 53 return read_sysreg(MPIDR); 54 } 55 56 #define MPIDR_HWID_BITMASK 0xffffff 57 extern int mpidr_to_cpu(uint64_t mpidr); 58 59 #define MPIDR_LEVEL_SHIFT(level) \ 60 (((1 << level) >> 1) << 3) 61 #define MPIDR_AFFINITY_LEVEL(mpidr, level) \ 62 ((mpidr >> MPIDR_LEVEL_SHIFT(level)) & 0xff) 63 64 extern void start_usr(void (*func)(void *arg), void *arg, unsigned long sp_usr); 65 extern bool __mmu_enabled(void); 66 extern bool is_user(void); 67 68 #define CNTVCT __ACCESS_CP15_64(1, c14) 69 #define CNTFRQ __ACCESS_CP15(c14, 0, c0, 0) 70 #define CTR __ACCESS_CP15(c0, 0, c0, 1) 71 #define SCTRL __ACCESS_CP15(c1, 0, c0, 0) 72 73 static inline u64 get_cntvct(void) 74 { 75 isb(); 76 return read_sysreg(CNTVCT); 77 } 78 79 static inline u32 get_cntfrq(void) 80 { 81 return read_sysreg(CNTFRQ); 82 } 83 84 static inline u32 get_ctr(void) 85 { 86 return read_sysreg(CTR); 87 } 88 89 #endif /* _ASMARM_PROCESSOR_H_ */ 90