xref: /kvm-unit-tests/lib/arm/asm/processor.h (revision da905c9d2c48a5c88ec973e6fd4b808336aafdaa)
12edfe428SAndrew Jones #ifndef _ASMARM_PROCESSOR_H_
22edfe428SAndrew Jones #define _ASMARM_PROCESSOR_H_
32edfe428SAndrew Jones /*
42edfe428SAndrew Jones  * Copyright (C) 2014, Red Hat Inc, Andrew Jones <drjones@redhat.com>
52edfe428SAndrew Jones  *
62edfe428SAndrew Jones  * This work is licensed under the terms of the GNU LGPL, version 2.
72edfe428SAndrew Jones  */
88cca5668SAndrew Jones #include <asm/ptrace.h>
992fca209SWei Huang #include <asm/sysreg.h>
10a5875fd4SAndrew Jones #include <asm/barrier.h>
112edfe428SAndrew Jones 
122edfe428SAndrew Jones enum vector {
132edfe428SAndrew Jones 	EXCPTN_RST,
142edfe428SAndrew Jones 	EXCPTN_UND,
152edfe428SAndrew Jones 	EXCPTN_SVC,
162edfe428SAndrew Jones 	EXCPTN_PABT,
172edfe428SAndrew Jones 	EXCPTN_DABT,
182edfe428SAndrew Jones 	EXCPTN_ADDREXCPTN,
192edfe428SAndrew Jones 	EXCPTN_IRQ,
202edfe428SAndrew Jones 	EXCPTN_FIQ,
212edfe428SAndrew Jones 	EXCPTN_MAX,
222edfe428SAndrew Jones };
232edfe428SAndrew Jones 
242edfe428SAndrew Jones typedef void (*exception_fn)(struct pt_regs *);
252edfe428SAndrew Jones extern void install_exception_handler(enum vector v, exception_fn fn);
262edfe428SAndrew Jones 
272edfe428SAndrew Jones extern void show_regs(struct pt_regs *regs);
282edfe428SAndrew Jones 
292edfe428SAndrew Jones static inline unsigned long current_cpsr(void)
302edfe428SAndrew Jones {
312edfe428SAndrew Jones 	unsigned long cpsr;
322edfe428SAndrew Jones 	asm volatile("mrs %0, cpsr" : "=r" (cpsr));
332edfe428SAndrew Jones 	return cpsr;
342edfe428SAndrew Jones }
352edfe428SAndrew Jones 
362edfe428SAndrew Jones #define current_mode() (current_cpsr() & MODE_MASK)
372edfe428SAndrew Jones 
38990e5425SAndrew Jones static inline void local_irq_enable(void)
39990e5425SAndrew Jones {
40990e5425SAndrew Jones 	asm volatile("cpsie i" : : : "memory", "cc");
41990e5425SAndrew Jones }
42990e5425SAndrew Jones 
43990e5425SAndrew Jones static inline void local_irq_disable(void)
44990e5425SAndrew Jones {
45990e5425SAndrew Jones 	asm volatile("cpsid i" : : : "memory", "cc");
46990e5425SAndrew Jones }
47990e5425SAndrew Jones 
4892fca209SWei Huang #define MPIDR __ACCESS_CP15(c0, 0, c0, 5)
49*da905c9dSAndrew Jones static inline uint64_t get_mpidr(void)
50f6d10793SAndrew Jones {
5192fca209SWei Huang 	return read_sysreg(MPIDR);
52f6d10793SAndrew Jones }
53f6d10793SAndrew Jones 
54d9729025SAndrew Jones #define MPIDR_HWID_BITMASK 0xffffff
55d9729025SAndrew Jones extern int mpidr_to_cpu(uint64_t mpidr);
56d9729025SAndrew Jones 
57d9729025SAndrew Jones #define MPIDR_LEVEL_SHIFT(level) \
58d9729025SAndrew Jones 	(((1 << level) >> 1) << 3)
59d9729025SAndrew Jones #define MPIDR_AFFINITY_LEVEL(mpidr, level) \
60d9729025SAndrew Jones 	((mpidr >> MPIDR_LEVEL_SHIFT(level)) & 0xff)
61f6d10793SAndrew Jones 
622edfe428SAndrew Jones extern void start_usr(void (*func)(void *arg), void *arg, unsigned long sp_usr);
63f6d10793SAndrew Jones extern bool is_user(void);
642edfe428SAndrew Jones 
65a5875fd4SAndrew Jones #define CNTVCT		__ACCESS_CP15_64(1, c14)
66a5875fd4SAndrew Jones #define CNTFRQ		__ACCESS_CP15(c14, 0, c0, 0)
67a5875fd4SAndrew Jones 
68a5875fd4SAndrew Jones static inline u64 get_cntvct(void)
69a5875fd4SAndrew Jones {
70a5875fd4SAndrew Jones 	isb();
71a5875fd4SAndrew Jones 	return read_sysreg(CNTVCT);
72a5875fd4SAndrew Jones }
73a5875fd4SAndrew Jones 
74a5875fd4SAndrew Jones static inline u32 get_cntfrq(void)
75a5875fd4SAndrew Jones {
76a5875fd4SAndrew Jones 	return read_sysreg(CNTFRQ);
77a5875fd4SAndrew Jones }
78a5875fd4SAndrew Jones 
792edfe428SAndrew Jones #endif /* _ASMARM_PROCESSOR_H_ */
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