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 10 enum vector { 11 EXCPTN_RST, 12 EXCPTN_UND, 13 EXCPTN_SVC, 14 EXCPTN_PABT, 15 EXCPTN_DABT, 16 EXCPTN_ADDREXCPTN, 17 EXCPTN_IRQ, 18 EXCPTN_FIQ, 19 EXCPTN_MAX, 20 }; 21 22 typedef void (*exception_fn)(struct pt_regs *); 23 extern void install_exception_handler(enum vector v, exception_fn fn); 24 25 extern void show_regs(struct pt_regs *regs); 26 27 static inline unsigned long current_cpsr(void) 28 { 29 unsigned long cpsr; 30 asm volatile("mrs %0, cpsr" : "=r" (cpsr)); 31 return cpsr; 32 } 33 34 #define current_mode() (current_cpsr() & MODE_MASK) 35 36 static inline unsigned int get_mpidr(void) 37 { 38 unsigned int mpidr; 39 asm volatile("mrc p15, 0, %0, c0, c0, 5" : "=r" (mpidr)); 40 return mpidr; 41 } 42 43 /* Only support Aff0 for now, up to 4 cpus */ 44 #define mpidr_to_cpu(mpidr) ((int)((mpidr) & 0xff)) 45 46 extern void start_usr(void (*func)(void *arg), void *arg, unsigned long sp_usr); 47 extern bool is_user(void); 48 49 #endif /* _ASMARM_PROCESSOR_H_ */ 50