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 #include <asm/sysreg.h> 23 #include <asm/barrier.h> 24 25 enum vector { 26 EL1T_SYNC, 27 EL1T_IRQ, 28 EL1T_FIQ, 29 EL1T_ERROR, 30 EL1H_SYNC, 31 EL1H_IRQ, 32 EL1H_FIQ, 33 EL1H_ERROR, 34 EL0_SYNC_64, 35 EL0_IRQ_64, 36 EL0_FIQ_64, 37 EL0_ERROR_64, 38 EL0_SYNC_32, 39 EL0_IRQ_32, 40 EL0_FIQ_32, 41 EL0_ERROR_32, 42 VECTOR_MAX, 43 }; 44 45 #define EC_MAX 64 46 47 typedef void (*vector_fn)(enum vector v, struct pt_regs *regs, 48 unsigned int esr); 49 typedef void (*exception_fn)(struct pt_regs *regs, unsigned int esr); 50 typedef void (*irq_handler_fn)(struct pt_regs *regs); 51 extern void install_vector_handler(enum vector v, vector_fn fn); 52 extern void install_exception_handler(enum vector v, unsigned int ec, 53 exception_fn fn); 54 extern void install_irq_handler(enum vector v, irq_handler_fn fn); 55 extern void default_vector_sync_handler(enum vector v, struct pt_regs *regs, 56 unsigned int esr); 57 extern void default_vector_irq_handler(enum vector v, struct pt_regs *regs, 58 unsigned int esr); 59 extern void vector_handlers_default_init(vector_fn *handlers); 60 61 extern void show_regs(struct pt_regs *regs); 62 extern bool get_far(unsigned int esr, unsigned long *far); 63 64 static inline unsigned long current_level(void) 65 { 66 unsigned long el; 67 asm volatile("mrs %0, CurrentEL" : "=r" (el)); 68 return el & 0xc; 69 } 70 71 static inline void local_irq_enable(void) 72 { 73 asm volatile("msr daifclr, #2" : : : "memory"); 74 } 75 76 static inline void local_irq_disable(void) 77 { 78 asm volatile("msr daifset, #2" : : : "memory"); 79 } 80 81 static inline uint64_t get_mpidr(void) 82 { 83 return read_sysreg(mpidr_el1); 84 } 85 86 #define MPIDR_HWID_BITMASK 0xff00ffffff 87 extern int mpidr_to_cpu(uint64_t mpidr); 88 89 #define MPIDR_LEVEL_SHIFT(level) \ 90 (((1 << level) >> 1) << 3) 91 #define MPIDR_AFFINITY_LEVEL(mpidr, level) \ 92 ((mpidr >> MPIDR_LEVEL_SHIFT(level)) & 0xff) 93 94 extern void start_usr(void (*func)(void *arg), void *arg, unsigned long sp_usr); 95 extern bool is_user(void); 96 97 static inline u64 get_cntvct(void) 98 { 99 isb(); 100 return read_sysreg(cntvct_el0); 101 } 102 103 static inline u32 get_cntfrq(void) 104 { 105 return read_sysreg(cntfrq_el0); 106 } 107 108 #endif /* !__ASSEMBLY__ */ 109 #endif /* _ASMARM64_PROCESSOR_H_ */ 110