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