1 #ifndef _ASMARM64_PROCESSOR_H_ 2 #define _ASMARM64_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 9 /* System Control Register (SCTLR_EL1) bits */ 10 #define SCTLR_EL1_EE (1 << 25) 11 #define SCTLR_EL1_WXN (1 << 19) 12 #define SCTLR_EL1_I (1 << 12) 13 #define SCTLR_EL1_SA0 (1 << 4) 14 #define SCTLR_EL1_SA (1 << 3) 15 #define SCTLR_EL1_C (1 << 2) 16 #define SCTLR_EL1_A (1 << 1) 17 #define SCTLR_EL1_M (1 << 0) 18 19 #ifndef __ASSEMBLY__ 20 #include <asm/ptrace.h> 21 #include <asm/esr.h> 22 23 enum vector { 24 EL1T_SYNC, 25 EL1T_IRQ, 26 EL1T_FIQ, 27 EL1T_ERROR, 28 EL1H_SYNC, 29 EL1H_IRQ, 30 EL1H_FIQ, 31 EL1H_ERROR, 32 EL0_SYNC_64, 33 EL0_IRQ_64, 34 EL0_FIQ_64, 35 EL0_ERROR_64, 36 EL0_SYNC_32, 37 EL0_IRQ_32, 38 EL0_FIQ_32, 39 EL0_ERROR_32, 40 VECTOR_MAX, 41 }; 42 43 #define EC_MAX 64 44 45 typedef void (*vector_fn)(enum vector v, struct pt_regs *regs, 46 unsigned int esr); 47 typedef void (*exception_fn)(struct pt_regs *regs, unsigned int esr); 48 typedef void (*irq_handler_fn)(struct pt_regs *regs); 49 extern void install_vector_handler(enum vector v, vector_fn fn); 50 extern void install_exception_handler(enum vector v, unsigned int ec, 51 exception_fn fn); 52 extern void install_irq_handler(enum vector v, irq_handler_fn fn); 53 extern void default_vector_sync_handler(enum vector v, struct pt_regs *regs, 54 unsigned int esr); 55 extern void default_vector_irq_handler(enum vector v, struct pt_regs *regs, 56 unsigned int esr); 57 extern void vector_handlers_default_init(vector_fn *handlers); 58 59 extern void show_regs(struct pt_regs *regs); 60 extern bool get_far(unsigned int esr, unsigned long *far); 61 62 static inline unsigned long current_level(void) 63 { 64 unsigned long el; 65 asm volatile("mrs %0, CurrentEL" : "=r" (el)); 66 return el & 0xc; 67 } 68 69 #define DEFINE_GET_SYSREG32(reg) \ 70 static inline unsigned int get_##reg(void) \ 71 { \ 72 unsigned int reg; \ 73 asm volatile("mrs %0, " #reg "_el1" : "=r" (reg)); \ 74 return reg; \ 75 } 76 DEFINE_GET_SYSREG32(mpidr) 77 78 /* Only support Aff0 for now, gicv2 only */ 79 #define mpidr_to_cpu(mpidr) ((int)((mpidr) & 0xff)) 80 81 extern void start_usr(void (*func)(void *arg), void *arg, unsigned long sp_usr); 82 extern bool is_user(void); 83 84 #endif /* !__ASSEMBLY__ */ 85 #endif /* _ASMARM64_PROCESSOR_H_ */ 86