| #ifndef _ASM_POWERPC_PROBES_H | |
| #define _ASM_POWERPC_PROBES_H | |
| #ifdef __KERNEL__ | |
| /* | |
| * Definitions common to probes files | |
| * | |
| * This program is free software; you can redistribute it and/or modify | |
| * it under the terms of the GNU General Public License as published by | |
| * the Free Software Foundation; either version 2 of the License, or | |
| * (at your option) any later version. | |
| * | |
| * This program is distributed in the hope that it will be useful, | |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| * GNU General Public License for more details. | |
| * | |
| * You should have received a copy of the GNU General Public License | |
| * along with this program; if not, write to the Free Software | |
| * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
| * | |
| * 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 */ |