K.Prasad | b332828c | 2009-06-01 23:43:10 +0530 | [diff] [blame] | 1 | #ifndef _I386_HW_BREAKPOINT_H |
| 2 | #define _I386_HW_BREAKPOINT_H |
| 3 | |
| 4 | #ifdef __KERNEL__ |
| 5 | #define __ARCH_HW_BREAKPOINT_H |
| 6 | |
Frederic Weisbecker | 24f1e32c | 2009-09-09 19:22:48 +0200 | [diff] [blame] | 7 | /* |
| 8 | * The name should probably be something dealt in |
| 9 | * a higher level. While dealing with the user |
| 10 | * (display/resolving) |
| 11 | */ |
K.Prasad | b332828c | 2009-06-01 23:43:10 +0530 | [diff] [blame] | 12 | struct arch_hw_breakpoint { |
K.Prasad | b332828c | 2009-06-01 23:43:10 +0530 | [diff] [blame] | 13 | unsigned long address; |
| 14 | u8 len; |
| 15 | u8 type; |
| 16 | }; |
| 17 | |
| 18 | #include <linux/kdebug.h> |
Frederic Weisbecker | 24f1e32c | 2009-09-09 19:22:48 +0200 | [diff] [blame] | 19 | #include <linux/percpu.h> |
| 20 | #include <linux/list.h> |
K.Prasad | b332828c | 2009-06-01 23:43:10 +0530 | [diff] [blame] | 21 | |
| 22 | /* Available HW breakpoint length encodings */ |
Frederic Weisbecker | f7809da | 2010-06-24 10:00:24 +0200 | [diff] [blame] | 23 | #define X86_BREAKPOINT_LEN_X 0x00 |
Frederic Weisbecker | 24f1e32c | 2009-09-09 19:22:48 +0200 | [diff] [blame] | 24 | #define X86_BREAKPOINT_LEN_1 0x40 |
| 25 | #define X86_BREAKPOINT_LEN_2 0x44 |
| 26 | #define X86_BREAKPOINT_LEN_4 0x4c |
K.Prasad | b332828c | 2009-06-01 23:43:10 +0530 | [diff] [blame] | 27 | |
| 28 | #ifdef CONFIG_X86_64 |
Frederic Weisbecker | 24f1e32c | 2009-09-09 19:22:48 +0200 | [diff] [blame] | 29 | #define X86_BREAKPOINT_LEN_8 0x48 |
K.Prasad | b332828c | 2009-06-01 23:43:10 +0530 | [diff] [blame] | 30 | #endif |
| 31 | |
| 32 | /* Available HW breakpoint type encodings */ |
| 33 | |
| 34 | /* trigger on instruction execute */ |
Frederic Weisbecker | 24f1e32c | 2009-09-09 19:22:48 +0200 | [diff] [blame] | 35 | #define X86_BREAKPOINT_EXECUTE 0x80 |
K.Prasad | b332828c | 2009-06-01 23:43:10 +0530 | [diff] [blame] | 36 | /* trigger on memory write */ |
Frederic Weisbecker | 24f1e32c | 2009-09-09 19:22:48 +0200 | [diff] [blame] | 37 | #define X86_BREAKPOINT_WRITE 0x81 |
K.Prasad | b332828c | 2009-06-01 23:43:10 +0530 | [diff] [blame] | 38 | /* trigger on memory read or write */ |
Frederic Weisbecker | 24f1e32c | 2009-09-09 19:22:48 +0200 | [diff] [blame] | 39 | #define X86_BREAKPOINT_RW 0x83 |
K.Prasad | b332828c | 2009-06-01 23:43:10 +0530 | [diff] [blame] | 40 | |
| 41 | /* Total number of available HW breakpoint registers */ |
| 42 | #define HBP_NUM 4 |
| 43 | |
Frederic Weisbecker | feef47d | 2010-04-23 05:59:55 +0200 | [diff] [blame] | 44 | static inline int hw_breakpoint_slots(int type) |
| 45 | { |
| 46 | return HBP_NUM; |
| 47 | } |
| 48 | |
Frederic Weisbecker | 24f1e32c | 2009-09-09 19:22:48 +0200 | [diff] [blame] | 49 | struct perf_event; |
| 50 | struct pmu; |
K.Prasad | b332828c | 2009-06-01 23:43:10 +0530 | [diff] [blame] | 51 | |
Frederic Weisbecker | b2812d0 | 2010-04-18 18:11:53 +0200 | [diff] [blame] | 52 | extern int arch_check_bp_in_kernelspace(struct perf_event *bp); |
| 53 | extern int arch_validate_hwbkpt_settings(struct perf_event *bp); |
K.Prasad | b332828c | 2009-06-01 23:43:10 +0530 | [diff] [blame] | 54 | extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused, |
Frederic Weisbecker | 24f1e32c | 2009-09-09 19:22:48 +0200 | [diff] [blame] | 55 | unsigned long val, void *data); |
| 56 | |
| 57 | |
| 58 | int arch_install_hw_breakpoint(struct perf_event *bp); |
| 59 | void arch_uninstall_hw_breakpoint(struct perf_event *bp); |
| 60 | void hw_breakpoint_pmu_read(struct perf_event *bp); |
| 61 | void hw_breakpoint_pmu_unthrottle(struct perf_event *bp); |
| 62 | |
| 63 | extern void |
| 64 | arch_fill_perf_breakpoint(struct perf_event *bp); |
| 65 | |
| 66 | unsigned long encode_dr7(int drnum, unsigned int len, unsigned int type); |
| 67 | int decode_dr7(unsigned long dr7, int bpnum, unsigned *len, unsigned *type); |
| 68 | |
| 69 | extern int arch_bp_generic_fields(int x86_len, int x86_type, |
| 70 | int *gen_len, int *gen_type); |
| 71 | |
| 72 | extern struct pmu perf_ops_bp; |
| 73 | |
K.Prasad | b332828c | 2009-06-01 23:43:10 +0530 | [diff] [blame] | 74 | #endif /* __KERNEL__ */ |
| 75 | #endif /* _I386_HW_BREAKPOINT_H */ |
| 76 | |