projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1a59d1b8 | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| 7118e7e6 AM |
2 | #ifndef _ASM_POWERPC_PROBES_H |
| 3 | #define _ASM_POWERPC_PROBES_H | |
| 4 | #ifdef __KERNEL__ | |
| 5 | /* | |
| 6 | * Definitions common to probes files | |
| 7 | * | |
| 7118e7e6 AM |
8 | * Copyright IBM Corporation, 2012 |
| 9 | */ | |
| 10 | #include <linux/types.h> | |
| 11 | ||
| 28e1e58f | 12 | typedef u32 ppc_opcode_t; |
| 7118e7e6 AM |
13 | #define BREAKPOINT_INSTRUCTION 0x7fe00008 /* trap */ |
| 14 | ||
| 15 | /* Trap definitions per ISA */ | |
| 16 | #define IS_TW(instr) (((instr) & 0xfc0007fe) == 0x7c000008) | |
| 17 | #define IS_TD(instr) (((instr) & 0xfc0007fe) == 0x7c000088) | |
| 18 | #define IS_TDI(instr) (((instr) & 0xfc000000) == 0x08000000) | |
| 19 | #define IS_TWI(instr) (((instr) & 0xfc000000) == 0x0c000000) | |
| 20 | ||
| 21 | #ifdef CONFIG_PPC64 | |
| 22 | #define is_trap(instr) (IS_TW(instr) || IS_TD(instr) || \ | |
| 23 | IS_TWI(instr) || IS_TDI(instr)) | |
| 24 | #else | |
| 25 | #define is_trap(instr) (IS_TW(instr) || IS_TWI(instr)) | |
| 26 | #endif /* CONFIG_PPC64 */ | |
| 27 | ||
| 35fd219a SP |
28 | #ifdef CONFIG_PPC_ADV_DEBUG_REGS |
| 29 | #define MSR_SINGLESTEP (MSR_DE) | |
| 30 | #else | |
| 31 | #define MSR_SINGLESTEP (MSR_SE) | |
| 32 | #endif | |
| 33 | ||
| 34 | /* Enable single stepping for the current task */ | |
| 35 | static inline void enable_single_step(struct pt_regs *regs) | |
| 36 | { | |
| 37 | regs->msr |= MSR_SINGLESTEP; | |
| 38 | #ifdef CONFIG_PPC_ADV_DEBUG_REGS | |
| 39 | /* | |
| 40 | * We turn off Critical Input Exception(CE) to ensure that the single | |
| 41 | * step will be for the instruction we have the probe on; if we don't, | |
| 42 | * it is possible we'd get the single step reported for CE. | |
| 43 | */ | |
| 44 | regs->msr &= ~MSR_CE; | |
| 45 | mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) | DBCR0_IC | DBCR0_IDM); | |
| 46 | #ifdef CONFIG_PPC_47x | |
| 47 | isync(); | |
| 48 | #endif | |
| 49 | #endif | |
| 50 | } | |
| 51 | ||
| 52 | ||
| 7118e7e6 AM |
53 | #endif /* __KERNEL__ */ |
| 54 | #endif /* _ASM_POWERPC_PROBES_H */ |