/* SPDX-License-Identifier: GPL-2.0-or-later */ #ifndef _ASM_POWERPC_PROBES_H #define _ASM_POWERPC_PROBES_H #ifdef __KERNEL__ /* * Definitions common to probes files * * Copyright IBM Corporation, 2012 */ #include <linux/types.h> typedef u32 ppc_opcode_t; #define BREAKPOINT_INSTRUCTION 0x7fe00008 /* trap */ /* Trap definitions per ISA */ #define IS_TW(instr) (((instr) & 0xfc0007fe) == 0x7c000008) #define IS_TD(instr) (((instr) & 0xfc0007fe) == 0x7c000088) #define IS_TDI(instr) (((instr) & 0xfc000000) == 0x08000000) #define IS_TWI(instr) (((instr) & 0xfc000000) == 0x0c000000) #ifdef CONFIG_PPC64 #define is_trap(instr) (IS_TW(instr) || IS_TD(instr) || \ IS_TWI(instr) || IS_TDI(instr)) #else #define is_trap(instr) (IS_TW(instr) || IS_TWI(instr)) #endif /* CONFIG_PPC64 */ #ifdef CONFIG_PPC_ADV_DEBUG_REGS #define MSR_SINGLESTEP (MSR_DE) #else #define MSR_SINGLESTEP (MSR_SE) #endif /* Enable single stepping for the current task */ static inline void enable_single_step(struct pt_regs *regs) { regs->msr |= MSR_SINGLESTEP; #ifdef CONFIG_PPC_ADV_DEBUG_REGS /* * We turn off Critical Input Exception(CE) to ensure that the single * step will be for the instruction we have the probe on; if we don't, * it is possible we'd get the single step reported for CE. */ regs->msr &= ~MSR_CE; mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) | DBCR0_IC | DBCR0_IDM); #ifdef CONFIG_PPC_47x isync(); #endif #endif } #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_PROBES_H */