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1 | #ifndef _ASM_POWERPC_PROBES_H |
2 | #define _ASM_POWERPC_PROBES_H | |
3 | #ifdef __KERNEL__ | |
4 | /* | |
5 | * Definitions common to probes files | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
20 | * | |
21 | * Copyright IBM Corporation, 2012 | |
22 | */ | |
23 | #include <linux/types.h> | |
24 | ||
28e1e58f | 25 | typedef u32 ppc_opcode_t; |
7118e7e6 AM |
26 | #define BREAKPOINT_INSTRUCTION 0x7fe00008 /* trap */ |
27 | ||
28 | /* Trap definitions per ISA */ | |
29 | #define IS_TW(instr) (((instr) & 0xfc0007fe) == 0x7c000008) | |
30 | #define IS_TD(instr) (((instr) & 0xfc0007fe) == 0x7c000088) | |
31 | #define IS_TDI(instr) (((instr) & 0xfc000000) == 0x08000000) | |
32 | #define IS_TWI(instr) (((instr) & 0xfc000000) == 0x0c000000) | |
33 | ||
34 | #ifdef CONFIG_PPC64 | |
35 | #define is_trap(instr) (IS_TW(instr) || IS_TD(instr) || \ | |
36 | IS_TWI(instr) || IS_TDI(instr)) | |
37 | #else | |
38 | #define is_trap(instr) (IS_TW(instr) || IS_TWI(instr)) | |
39 | #endif /* CONFIG_PPC64 */ | |
40 | ||
35fd219a SP |
41 | #ifdef CONFIG_PPC_ADV_DEBUG_REGS |
42 | #define MSR_SINGLESTEP (MSR_DE) | |
43 | #else | |
44 | #define MSR_SINGLESTEP (MSR_SE) | |
45 | #endif | |
46 | ||
47 | /* Enable single stepping for the current task */ | |
48 | static inline void enable_single_step(struct pt_regs *regs) | |
49 | { | |
50 | regs->msr |= MSR_SINGLESTEP; | |
51 | #ifdef CONFIG_PPC_ADV_DEBUG_REGS | |
52 | /* | |
53 | * We turn off Critical Input Exception(CE) to ensure that the single | |
54 | * step will be for the instruction we have the probe on; if we don't, | |
55 | * it is possible we'd get the single step reported for CE. | |
56 | */ | |
57 | regs->msr &= ~MSR_CE; | |
58 | mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) | DBCR0_IC | DBCR0_IDM); | |
59 | #ifdef CONFIG_PPC_47x | |
60 | isync(); | |
61 | #endif | |
62 | #endif | |
63 | } | |
64 | ||
65 | ||
7118e7e6 AM |
66 | #endif /* __KERNEL__ */ |
67 | #endif /* _ASM_POWERPC_PROBES_H */ |