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 char *name; /* Contains name of the symbol to set bkpt */ 14 unsigned long address; 15 u16 len; 16 u16 type; 17 }; 18 19 enum { 20 SH_BREAKPOINT_READ = (1 << 1), 21 SH_BREAKPOINT_WRITE = (1 << 2), 22 SH_BREAKPOINT_RW = SH_BREAKPOINT_READ | SH_BREAKPOINT_WRITE, 23 24 SH_BREAKPOINT_LEN_1 = (1 << 12), 25 SH_BREAKPOINT_LEN_2 = (1 << 13), 26 SH_BREAKPOINT_LEN_4 = SH_BREAKPOINT_LEN_1 | SH_BREAKPOINT_LEN_2, 27 SH_BREAKPOINT_LEN_8 = (1 << 14), 28 }; 29 30 struct sh_ubc { 31 const char *name; 32 unsigned int num_events; 33 unsigned int trap_nr; 34 void (*enable)(struct arch_hw_breakpoint *, int); 35 void (*disable)(struct arch_hw_breakpoint *, int); 36 void (*enable_all)(unsigned long); 37 void (*disable_all)(void); 38 unsigned long (*active_mask)(void); 39 unsigned long (*triggered_mask)(void); 40 void (*clear_triggered_mask)(unsigned long); 41 struct clk *clk; /* optional interface clock / MSTP bit */ 42 }; 43 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 static inline int hw_breakpoint_slots(int type) 52 { 53 return HBP_NUM; 54 } 55 56 /* arch/sh/kernel/hw_breakpoint.c */ 57 extern int arch_check_bp_in_kernelspace(struct perf_event *bp); 58 extern int arch_validate_hwbkpt_settings(struct perf_event *bp); 59 extern int hw_breakpoint_exceptions_notify(struct notifier_block *unused, 60 unsigned long val, void *data); 61 62 int arch_install_hw_breakpoint(struct perf_event *bp); 63 void arch_uninstall_hw_breakpoint(struct perf_event *bp); 64 void hw_breakpoint_pmu_read(struct perf_event *bp); 65 66 extern void arch_fill_perf_breakpoint(struct perf_event *bp); 67 extern int register_sh_ubc(struct sh_ubc *); 68 69 extern struct pmu perf_ops_bp; 70 71 #endif /* __ASM_SH_HW_BREAKPOINT_H */ 72