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- /*
- * Copyright (C) 2004 Paul Mackerras <paulus@au.ibm.com>, IBM
- *
- * 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.
- */
- struct pt_regs;
- /*
- * We don't allow single-stepping an mtmsrd that would clear
- * MSR_RI, since that would make the exception unrecoverable.
- * Since we need to single-step to proceed from a breakpoint,
- * we don't allow putting a breakpoint on an mtmsrd instruction.
- * Similarly we don't allow breakpoints on rfid instructions.
- * These macros tell us if an instruction is a mtmsrd or rfid.
- * Note that IS_MTMSRD returns true for both an mtmsr (32-bit)
- * and an mtmsrd (64-bit).
- */
- #define IS_MTMSRD(instr) (((instr) & 0xfc0007be) == 0x7c000124)
- #define IS_RFID(instr) (((instr) & 0xfc0007fe) == 0x4c000024)
- #define IS_RFI(instr) (((instr) & 0xfc0007fe) == 0x4c000064)
- /* Emulate instructions that cause a transfer of control. */
- extern int emulate_step(struct pt_regs *regs, unsigned int instr);
- enum instruction_type {
- COMPUTE, /* arith/logical/CR op, etc. */
- LOAD,
- LOAD_MULTI,
- LOAD_FP,
- LOAD_VMX,
- LOAD_VSX,
- STORE,
- STORE_MULTI,
- STORE_FP,
- STORE_VMX,
- STORE_VSX,
- LARX,
- STCX,
- BRANCH,
- MFSPR,
- MTSPR,
- CACHEOP,
- BARRIER,
- SYSCALL,
- MFMSR,
- MTMSR,
- RFI,
- INTERRUPT,
- UNKNOWN
- };
- #define INSTR_TYPE_MASK 0x1f
- /* Load/store flags, ORed in with type */
- #define SIGNEXT 0x20
- #define UPDATE 0x40 /* matches bit in opcode 31 instructions */
- #define BYTEREV 0x80
- /* Cacheop values, ORed in with type */
- #define CACHEOP_MASK 0x700
- #define DCBST 0
- #define DCBF 0x100
- #define DCBTST 0x200
- #define DCBT 0x300
- #define ICBI 0x400
- /* Size field in type word */
- #define SIZE(n) ((n) << 8)
- #define GETSIZE(w) ((w) >> 8)
- #define MKOP(t, f, s) ((t) | (f) | SIZE(s))
- struct instruction_op {
- int type;
- int reg;
- unsigned long val;
- /* For LOAD/STORE/LARX/STCX */
- unsigned long ea;
- int update_reg;
- /* For MFSPR */
- int spr;
- };
- extern int analyse_instr(struct instruction_op *op, struct pt_regs *regs,
- unsigned int instr);
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