1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __ASM_SH_HW_BREAKPOINT_H
3 #define __ASM_SH_HW_BREAKPOINT_H
4
5 #include <uapi/asm/hw_breakpoint.h>
6
7 #define __ARCH_HW_BREAKPOINT_H
8
9 #include <linux/kdebug.h>
10 #include <linux/types.h>
11
12 struct arch_hw_breakpoint {
13 unsigned long address;
14 u16 len;
15 u16 type;
16 };
17
18 enum {
19 SH_BREAKPOINT_READ = (1 << 1),
20 SH_BREAKPOINT_WRITE = (1 << 2),
21 SH_BREAKPOINT_RW = SH_BREAKPOINT_READ | SH_BREAKPOINT_WRITE,
22
23 SH_BREAKPOINT_LEN_1 = (1 << 12),
24 SH_BREAKPOINT_LEN_2 = (1 << 13),
25 SH_BREAKPOINT_LEN_4 = SH_BREAKPOINT_LEN_1 | SH_BREAKPOINT_LEN_2,
26 SH_BREAKPOINT_LEN_8 = (1 << 14),
27 };
28
29 struct sh_ubc {
30 const char *name;
31 unsigned int num_events;
32 unsigned int trap_nr;
33 void (*enable)(struct arch_hw_breakpoint *, int);
34 void (*disable)(struct arch_hw_breakpoint *, int);
35 void (*enable_all)(unsigned long);
36 void (*disable_all)(void);
37 unsigned long (*active_mask)(void);
38 unsigned long (*triggered_mask)(void);
39 void (*clear_triggered_mask)(unsigned long);
40 struct clk *clk; /* optional interface clock / MSTP bit */
41 };
42
43 struct perf_event_attr;
44 struct perf_event;
45 struct task_struct;
46 struct pmu;
47
48 /* Maximum number of UBC channels */
49 #define HBP_NUM 2
50
51 #define hw_breakpoint_slots(type) (HBP_NUM)
52
53 /* arch/sh/kernel/hw_breakpoint.c */
54 extern int arch_check_bp_in_kernelspace(struct arch_hw_breakpoint *hw);
55 extern int arch_bp_generic_fields(int sh_len, int sh_type, int *gen_len,
56 int *gen_type);
57 extern int hw_breakpoint_arch_parse(struct perf_event *bp,
58 const struct perf_event_attr *attr,
59 struct arch_hw_breakpoint *hw);
60 extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused,
61 unsigned long val, void *data);
62
63 int arch_install_hw_breakpoint(struct perf_event *bp);
64 void arch_uninstall_hw_breakpoint(struct perf_event *bp);
65 void hw_breakpoint_pmu_read(struct perf_event *bp);
66
67 extern void arch_fill_perf_breakpoint(struct perf_event *bp);
68 extern int register_sh_ubc(struct sh_ubc *);
69
70 extern struct pmu perf_ops_bp;
71
72 #endif /* __ASM_SH_HW_BREAKPOINT_H */
73
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.