18c2ecf20Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0-or-later */ 28c2ecf20Sopenharmony_ci#ifndef _ASM_POWERPC_PROBES_H 38c2ecf20Sopenharmony_ci#define _ASM_POWERPC_PROBES_H 48c2ecf20Sopenharmony_ci#ifdef __KERNEL__ 58c2ecf20Sopenharmony_ci/* 68c2ecf20Sopenharmony_ci * Definitions common to probes files 78c2ecf20Sopenharmony_ci * 88c2ecf20Sopenharmony_ci * Copyright IBM Corporation, 2012 98c2ecf20Sopenharmony_ci */ 108c2ecf20Sopenharmony_ci#include <linux/types.h> 118c2ecf20Sopenharmony_ci 128c2ecf20Sopenharmony_citypedef u32 ppc_opcode_t; 138c2ecf20Sopenharmony_ci#define BREAKPOINT_INSTRUCTION 0x7fe00008 /* trap */ 148c2ecf20Sopenharmony_ci 158c2ecf20Sopenharmony_ci/* Trap definitions per ISA */ 168c2ecf20Sopenharmony_ci#define IS_TW(instr) (((instr) & 0xfc0007fe) == 0x7c000008) 178c2ecf20Sopenharmony_ci#define IS_TD(instr) (((instr) & 0xfc0007fe) == 0x7c000088) 188c2ecf20Sopenharmony_ci#define IS_TDI(instr) (((instr) & 0xfc000000) == 0x08000000) 198c2ecf20Sopenharmony_ci#define IS_TWI(instr) (((instr) & 0xfc000000) == 0x0c000000) 208c2ecf20Sopenharmony_ci 218c2ecf20Sopenharmony_ci#ifdef CONFIG_PPC64 228c2ecf20Sopenharmony_ci#define is_trap(instr) (IS_TW(instr) || IS_TD(instr) || \ 238c2ecf20Sopenharmony_ci IS_TWI(instr) || IS_TDI(instr)) 248c2ecf20Sopenharmony_ci#else 258c2ecf20Sopenharmony_ci#define is_trap(instr) (IS_TW(instr) || IS_TWI(instr)) 268c2ecf20Sopenharmony_ci#endif /* CONFIG_PPC64 */ 278c2ecf20Sopenharmony_ci 288c2ecf20Sopenharmony_ci#ifdef CONFIG_PPC_ADV_DEBUG_REGS 298c2ecf20Sopenharmony_ci#define MSR_SINGLESTEP (MSR_DE) 308c2ecf20Sopenharmony_ci#else 318c2ecf20Sopenharmony_ci#define MSR_SINGLESTEP (MSR_SE) 328c2ecf20Sopenharmony_ci#endif 338c2ecf20Sopenharmony_ci 348c2ecf20Sopenharmony_ci/* Enable single stepping for the current task */ 358c2ecf20Sopenharmony_cistatic inline void enable_single_step(struct pt_regs *regs) 368c2ecf20Sopenharmony_ci{ 378c2ecf20Sopenharmony_ci regs->msr |= MSR_SINGLESTEP; 388c2ecf20Sopenharmony_ci#ifdef CONFIG_PPC_ADV_DEBUG_REGS 398c2ecf20Sopenharmony_ci /* 408c2ecf20Sopenharmony_ci * We turn off Critical Input Exception(CE) to ensure that the single 418c2ecf20Sopenharmony_ci * step will be for the instruction we have the probe on; if we don't, 428c2ecf20Sopenharmony_ci * it is possible we'd get the single step reported for CE. 438c2ecf20Sopenharmony_ci */ 448c2ecf20Sopenharmony_ci regs->msr &= ~MSR_CE; 458c2ecf20Sopenharmony_ci mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) | DBCR0_IC | DBCR0_IDM); 468c2ecf20Sopenharmony_ci#ifdef CONFIG_PPC_47x 478c2ecf20Sopenharmony_ci isync(); 488c2ecf20Sopenharmony_ci#endif 498c2ecf20Sopenharmony_ci#endif 508c2ecf20Sopenharmony_ci} 518c2ecf20Sopenharmony_ci 528c2ecf20Sopenharmony_ci 538c2ecf20Sopenharmony_ci#endif /* __KERNEL__ */ 548c2ecf20Sopenharmony_ci#endif /* _ASM_POWERPC_PROBES_H */ 55