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 #define CTR_DMINLINE_SHIFT 16 13 #define CTR_DMINLINE_MASK (0xf << 16) 14 #define CTR_DMINLINE(x) \ 15 (((x) & CTR_DMINLINE_MASK) >> CTR_DMINLINE_SHIFT) 16 17 enum vector { 18 EXCPTN_RST, 19 EXCPTN_UND, 20 EXCPTN_SVC, 21 EXCPTN_PABT, 22 EXCPTN_DABT, 23 EXCPTN_ADDREXCPTN, 24 EXCPTN_IRQ, 25 EXCPTN_FIQ, 26 EXCPTN_MAX, 27 }; 28 29 typedef void (*exception_fn)(struct pt_regs *); 30 extern void install_exception_handler(enum vector v, exception_fn fn); 31 32 extern void show_regs(struct pt_regs *regs); 33 34 static inline unsigned long current_cpsr(void) 35 { 36 unsigned long cpsr; 37 asm volatile("mrs %0, cpsr" : "=r" (cpsr)); 38 return cpsr; 39 } 40 41 #define current_mode() (current_cpsr() & MODE_MASK) 42 43 static inline void local_irq_enable(void) 44 { 45 asm volatile("cpsie i" : : : "memory", "cc"); 46 } 47 48 static inline void local_irq_disable(void) 49 { 50 asm volatile("cpsid i" : : : "memory", "cc"); 51 } 52 53 #define MPIDR __ACCESS_CP15(c0, 0, c0, 5) 54 static inline uint64_t get_mpidr(void) 55 { 56 return read_sysreg(MPIDR); 57 } 58 59 #define MPIDR_HWID_BITMASK 0xffffff 60 extern int mpidr_to_cpu(uint64_t mpidr); 61 62 #define MPIDR_LEVEL_SHIFT(level) \ 63 (((1 << level) >> 1) << 3) 64 #define MPIDR_AFFINITY_LEVEL(mpidr, level) \ 65 ((mpidr >> MPIDR_LEVEL_SHIFT(level)) & 0xff) 66 67 extern void start_usr(void (*func)(void *arg), void *arg, unsigned long sp_usr); 68 extern bool is_user(void); 69 70 #define CNTVCT __ACCESS_CP15_64(1, c14) 71 #define CNTFRQ __ACCESS_CP15(c14, 0, c0, 0) 72 #define CTR __ACCESS_CP15(c0, 0, c0, 1) 73 74 static inline u64 get_cntvct(void) 75 { 76 isb(); 77 return read_sysreg(CNTVCT); 78 } 79 80 static inline u32 get_cntfrq(void) 81 { 82 return read_sysreg(CNTFRQ); 83 } 84 85 static inline u32 get_ctr(void) 86 { 87 return read_sysreg(CTR); 88 } 89 90 extern u32 dcache_line_size; 91 92 #endif /* _ASMARM_PROCESSOR_H_ */ 93