#ifndef __ASM_HW_BREAKPOINT_H
#define __ASM_HW_BREAKPOINT_H
+#include <asm/cputype.h>
+#include <asm/cpufeature.h>
+
#ifdef __KERNEL__
struct arch_hw_breakpoint_ctrl {
extern struct pmu perf_ops_bp;
+/* Determine number of BRP registers available. */
+static inline int get_num_brps(void)
+{
+ u64 dfr0 = read_system_reg(SYS_ID_AA64DFR0_EL1);
+ return 1 +
+ cpuid_feature_extract_unsigned_field(dfr0,
+ ID_AA64DFR0_BRPS_SHIFT);
+}
+
+/* Determine number of WRP registers available. */
+static inline int get_num_wrps(void)
+{
+ u64 dfr0 = read_system_reg(SYS_ID_AA64DFR0_EL1);
+ return 1 +
+ cpuid_feature_extract_unsigned_field(dfr0,
+ ID_AA64DFR0_WRPS_SHIFT);
+}
+
#endif /* __KERNEL__ */
#endif /* __ASM_BREAKPOINT_H */