635 lines
14 KiB
C
635 lines
14 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* A small micro-assembler. It is intentionally kept simple, does only
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* support a subset of instructions, and does not try to hide pipeline
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* effects like branch delay slots.
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*
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* Copyright (C) 2004, 2005, 2006, 2008 Thiemo Seufer
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* Copyright (C) 2005, 2007 Maciej W. Rozycki
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* Copyright (C) 2006 Ralf Baechle (ralf@linux-mips.org)
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* Copyright (C) 2012, 2013 MIPS Technologies, Inc. All rights reserved.
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*/
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enum fields {
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RS = 0x001,
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RT = 0x002,
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RD = 0x004,
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RE = 0x008,
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SIMM = 0x010,
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UIMM = 0x020,
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BIMM = 0x040,
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JIMM = 0x080,
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FUNC = 0x100,
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SET = 0x200,
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SCIMM = 0x400,
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SIMM9 = 0x800,
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};
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#define OP_MASK 0x3f
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#define OP_SH 26
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#define RD_MASK 0x1f
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#define RD_SH 11
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#define RE_MASK 0x1f
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#define RE_SH 6
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#define IMM_MASK 0xffff
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#define IMM_SH 0
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#define JIMM_MASK 0x3ffffff
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#define JIMM_SH 0
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#define FUNC_MASK 0x3f
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#define FUNC_SH 0
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#define SET_MASK 0x7
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#define SET_SH 0
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#define SIMM9_SH 7
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#define SIMM9_MASK 0x1ff
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enum opcode {
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insn_addiu, insn_addu, insn_and, insn_andi, insn_bbit0, insn_bbit1,
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insn_beq, insn_beql, insn_bgez, insn_bgezl, insn_bgtz, insn_blez,
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insn_bltz, insn_bltzl, insn_bne, insn_break, insn_cache, insn_cfc1,
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insn_cfcmsa, insn_ctc1, insn_ctcmsa, insn_daddiu, insn_daddu, insn_ddivu,
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insn_di, insn_dins, insn_dinsm, insn_dinsu, insn_divu, insn_dmfc0,
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insn_dmtc0, insn_dmultu, insn_drotr, insn_drotr32, insn_dsbh, insn_dshd,
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insn_dsll, insn_dsll32, insn_dsllv, insn_dsra, insn_dsra32, insn_dsrav,
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insn_dsrl, insn_dsrl32, insn_dsrlv, insn_dsubu, insn_eret, insn_ext,
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insn_ins, insn_j, insn_jal, insn_jalr, insn_jr, insn_lb, insn_lbu,
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insn_ld, insn_lddir, insn_ldpte, insn_ldx, insn_lh, insn_lhu,
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insn_ll, insn_lld, insn_lui, insn_lw, insn_lwu, insn_lwx, insn_mfc0,
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insn_mfhc0, insn_mfhi, insn_mflo, insn_movn, insn_movz, insn_mtc0,
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insn_mthc0, insn_mthi, insn_mtlo, insn_mul, insn_multu, insn_nor,
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insn_or, insn_ori, insn_pref, insn_rfe, insn_rotr, insn_sb,
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insn_sc, insn_scd, insn_sd, insn_sh, insn_sll, insn_sllv,
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insn_slt, insn_slti, insn_sltiu, insn_sltu, insn_sra, insn_srav,
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insn_srl, insn_srlv, insn_subu, insn_sw, insn_sync, insn_syscall,
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insn_tlbp, insn_tlbr, insn_tlbwi, insn_tlbwr, insn_wait, insn_wsbh,
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insn_xor, insn_xori, insn_yield,
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insn_invalid /* insn_invalid must be last */
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};
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struct insn {
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u32 match;
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enum fields fields;
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};
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static inline u32 build_rs(u32 arg)
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{
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WARN(arg & ~RS_MASK, KERN_WARNING "Micro-assembler field overflow\n");
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return (arg & RS_MASK) << RS_SH;
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}
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static inline u32 build_rt(u32 arg)
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{
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WARN(arg & ~RT_MASK, KERN_WARNING "Micro-assembler field overflow\n");
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return (arg & RT_MASK) << RT_SH;
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}
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static inline u32 build_rd(u32 arg)
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{
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WARN(arg & ~RD_MASK, KERN_WARNING "Micro-assembler field overflow\n");
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return (arg & RD_MASK) << RD_SH;
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}
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static inline u32 build_re(u32 arg)
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{
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WARN(arg & ~RE_MASK, KERN_WARNING "Micro-assembler field overflow\n");
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return (arg & RE_MASK) << RE_SH;
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}
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static inline u32 build_simm(s32 arg)
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{
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WARN(arg > 0x7fff || arg < -0x8000,
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KERN_WARNING "Micro-assembler field overflow\n");
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return arg & 0xffff;
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}
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static inline u32 build_uimm(u32 arg)
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{
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WARN(arg & ~IMM_MASK, KERN_WARNING "Micro-assembler field overflow\n");
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return arg & IMM_MASK;
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}
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static inline u32 build_scimm(u32 arg)
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{
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WARN(arg & ~SCIMM_MASK,
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KERN_WARNING "Micro-assembler field overflow\n");
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return (arg & SCIMM_MASK) << SCIMM_SH;
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}
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static inline u32 build_scimm9(s32 arg)
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{
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WARN((arg > 0xff || arg < -0x100),
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KERN_WARNING "Micro-assembler field overflow\n");
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return (arg & SIMM9_MASK) << SIMM9_SH;
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}
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static inline u32 build_func(u32 arg)
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{
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WARN(arg & ~FUNC_MASK, KERN_WARNING "Micro-assembler field overflow\n");
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return arg & FUNC_MASK;
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}
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static inline u32 build_set(u32 arg)
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{
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WARN(arg & ~SET_MASK, KERN_WARNING "Micro-assembler field overflow\n");
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return arg & SET_MASK;
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}
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static void build_insn(u32 **buf, enum opcode opc, ...);
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#define I_u1u2u3(op) \
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Ip_u1u2u3(op) \
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{ \
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build_insn(buf, insn##op, a, b, c); \
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} \
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UASM_EXPORT_SYMBOL(uasm_i##op);
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#define I_s3s1s2(op) \
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Ip_s3s1s2(op) \
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{ \
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build_insn(buf, insn##op, b, c, a); \
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} \
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UASM_EXPORT_SYMBOL(uasm_i##op);
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#define I_u2u1u3(op) \
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Ip_u2u1u3(op) \
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{ \
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build_insn(buf, insn##op, b, a, c); \
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} \
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UASM_EXPORT_SYMBOL(uasm_i##op);
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#define I_u3u2u1(op) \
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Ip_u3u2u1(op) \
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{ \
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build_insn(buf, insn##op, c, b, a); \
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} \
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UASM_EXPORT_SYMBOL(uasm_i##op);
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#define I_u3u1u2(op) \
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Ip_u3u1u2(op) \
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{ \
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build_insn(buf, insn##op, b, c, a); \
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} \
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UASM_EXPORT_SYMBOL(uasm_i##op);
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#define I_u1u2s3(op) \
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Ip_u1u2s3(op) \
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{ \
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build_insn(buf, insn##op, a, b, c); \
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} \
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UASM_EXPORT_SYMBOL(uasm_i##op);
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#define I_u2s3u1(op) \
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Ip_u2s3u1(op) \
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{ \
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build_insn(buf, insn##op, c, a, b); \
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} \
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UASM_EXPORT_SYMBOL(uasm_i##op);
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#define I_u2u1s3(op) \
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Ip_u2u1s3(op) \
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{ \
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build_insn(buf, insn##op, b, a, c); \
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} \
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UASM_EXPORT_SYMBOL(uasm_i##op);
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#define I_u2u1msbu3(op) \
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Ip_u2u1msbu3(op) \
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{ \
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build_insn(buf, insn##op, b, a, c+d-1, c); \
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} \
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UASM_EXPORT_SYMBOL(uasm_i##op);
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#define I_u2u1msb32u3(op) \
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Ip_u2u1msbu3(op) \
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{ \
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build_insn(buf, insn##op, b, a, c+d-33, c); \
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} \
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UASM_EXPORT_SYMBOL(uasm_i##op);
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#define I_u2u1msb32msb3(op) \
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Ip_u2u1msbu3(op) \
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{ \
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build_insn(buf, insn##op, b, a, c+d-33, c-32); \
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} \
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UASM_EXPORT_SYMBOL(uasm_i##op);
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#define I_u2u1msbdu3(op) \
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Ip_u2u1msbu3(op) \
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{ \
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build_insn(buf, insn##op, b, a, d-1, c); \
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} \
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UASM_EXPORT_SYMBOL(uasm_i##op);
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#define I_u1u2(op) \
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Ip_u1u2(op) \
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{ \
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build_insn(buf, insn##op, a, b); \
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} \
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UASM_EXPORT_SYMBOL(uasm_i##op);
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#define I_u2u1(op) \
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Ip_u1u2(op) \
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{ \
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build_insn(buf, insn##op, b, a); \
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} \
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UASM_EXPORT_SYMBOL(uasm_i##op);
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#define I_u1s2(op) \
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Ip_u1s2(op) \
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{ \
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build_insn(buf, insn##op, a, b); \
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} \
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UASM_EXPORT_SYMBOL(uasm_i##op);
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#define I_u1(op) \
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Ip_u1(op) \
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{ \
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build_insn(buf, insn##op, a); \
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} \
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UASM_EXPORT_SYMBOL(uasm_i##op);
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#define I_0(op) \
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Ip_0(op) \
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{ \
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build_insn(buf, insn##op); \
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} \
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UASM_EXPORT_SYMBOL(uasm_i##op);
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I_u2u1s3(_addiu)
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I_u3u1u2(_addu)
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I_u2u1u3(_andi)
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I_u3u1u2(_and)
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I_u1u2s3(_beq)
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I_u1u2s3(_beql)
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I_u1s2(_bgez)
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I_u1s2(_bgezl)
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I_u1s2(_bgtz)
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I_u1s2(_blez)
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I_u1s2(_bltz)
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I_u1s2(_bltzl)
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I_u1u2s3(_bne)
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I_u1(_break)
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I_u2s3u1(_cache)
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I_u1u2(_cfc1)
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I_u2u1(_cfcmsa)
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I_u1u2(_ctc1)
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I_u2u1(_ctcmsa)
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I_u1u2(_ddivu)
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I_u1u2u3(_dmfc0)
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I_u1u2u3(_dmtc0)
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I_u1u2(_dmultu)
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I_u2u1s3(_daddiu)
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I_u3u1u2(_daddu)
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I_u1(_di);
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I_u1u2(_divu)
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I_u2u1(_dsbh);
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I_u2u1(_dshd);
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I_u2u1u3(_dsll)
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I_u2u1u3(_dsll32)
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I_u3u2u1(_dsllv)
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I_u2u1u3(_dsra)
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I_u2u1u3(_dsra32)
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I_u3u2u1(_dsrav)
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I_u2u1u3(_dsrl)
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I_u2u1u3(_dsrl32)
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I_u3u2u1(_dsrlv)
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I_u2u1u3(_drotr)
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I_u2u1u3(_drotr32)
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I_u3u1u2(_dsubu)
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I_0(_eret)
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I_u2u1msbdu3(_ext)
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I_u2u1msbu3(_ins)
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I_u1(_j)
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I_u1(_jal)
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I_u2u1(_jalr)
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I_u1(_jr)
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I_u2s3u1(_lb)
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I_u2s3u1(_lbu)
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I_u2s3u1(_ld)
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I_u2s3u1(_lh)
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I_u2s3u1(_lhu)
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I_u2s3u1(_ll)
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I_u2s3u1(_lld)
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I_u1s2(_lui)
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I_u2s3u1(_lw)
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I_u2s3u1(_lwu)
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I_u1u2u3(_mfc0)
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I_u1u2u3(_mfhc0)
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I_u3u1u2(_movn)
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I_u3u1u2(_movz)
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I_u1(_mfhi)
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I_u1(_mflo)
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I_u1u2u3(_mtc0)
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I_u1u2u3(_mthc0)
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I_u1(_mthi)
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I_u1(_mtlo)
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I_u3u1u2(_mul)
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I_u1u2(_multu)
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I_u3u1u2(_nor)
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I_u3u1u2(_or)
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I_u2u1u3(_ori)
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I_0(_rfe)
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I_u2s3u1(_sb)
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I_u2s3u1(_sc)
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I_u2s3u1(_scd)
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I_u2s3u1(_sd)
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I_u2s3u1(_sh)
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I_u2u1u3(_sll)
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I_u3u2u1(_sllv)
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I_s3s1s2(_slt)
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I_u2u1s3(_slti)
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I_u2u1s3(_sltiu)
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I_u3u1u2(_sltu)
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I_u2u1u3(_sra)
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I_u3u2u1(_srav)
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I_u2u1u3(_srl)
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I_u3u2u1(_srlv)
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I_u2u1u3(_rotr)
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I_u3u1u2(_subu)
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I_u2s3u1(_sw)
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I_u1(_sync)
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I_0(_tlbp)
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I_0(_tlbr)
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I_0(_tlbwi)
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I_0(_tlbwr)
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I_u1(_wait);
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I_u2u1(_wsbh)
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I_u3u1u2(_xor)
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I_u2u1u3(_xori)
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I_u2u1(_yield)
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I_u2u1msbu3(_dins);
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I_u2u1msb32u3(_dinsm);
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I_u2u1msb32msb3(_dinsu);
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I_u1(_syscall);
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I_u1u2s3(_bbit0);
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I_u1u2s3(_bbit1);
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I_u3u1u2(_lwx)
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I_u3u1u2(_ldx)
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I_u1u2(_ldpte)
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I_u2u1u3(_lddir)
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#ifdef CONFIG_CPU_CAVIUM_OCTEON
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#include <asm/octeon/octeon.h>
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void uasm_i_pref(u32 **buf, unsigned int a, signed int b,
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unsigned int c)
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{
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if (CAVIUM_OCTEON_DCACHE_PREFETCH_WAR && a <= 24 && a != 5)
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/*
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* As per erratum Core-14449, replace prefetches 0-4,
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* 6-24 with 'pref 28'.
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*/
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build_insn(buf, insn_pref, c, 28, b);
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else
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build_insn(buf, insn_pref, c, a, b);
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}
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UASM_EXPORT_SYMBOL(uasm_i_pref);
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#else
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I_u2s3u1(_pref)
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#endif
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/* Handle labels. */
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void uasm_build_label(struct uasm_label **lab, u32 *addr, int lid)
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{
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(*lab)->addr = addr;
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(*lab)->lab = lid;
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(*lab)++;
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}
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UASM_EXPORT_SYMBOL(uasm_build_label);
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int uasm_in_compat_space_p(long addr)
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{
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/* Is this address in 32bit compat space? */
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return addr == (int)addr;
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}
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UASM_EXPORT_SYMBOL(uasm_in_compat_space_p);
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static int uasm_rel_highest(long val)
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{
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#ifdef CONFIG_64BIT
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return ((((val + 0x800080008000L) >> 48) & 0xffff) ^ 0x8000) - 0x8000;
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#else
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return 0;
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#endif
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}
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static int uasm_rel_higher(long val)
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{
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#ifdef CONFIG_64BIT
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return ((((val + 0x80008000L) >> 32) & 0xffff) ^ 0x8000) - 0x8000;
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#else
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return 0;
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#endif
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}
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int uasm_rel_hi(long val)
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{
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return ((((val + 0x8000L) >> 16) & 0xffff) ^ 0x8000) - 0x8000;
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}
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UASM_EXPORT_SYMBOL(uasm_rel_hi);
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int uasm_rel_lo(long val)
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{
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return ((val & 0xffff) ^ 0x8000) - 0x8000;
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}
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UASM_EXPORT_SYMBOL(uasm_rel_lo);
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void UASM_i_LA_mostly(u32 **buf, unsigned int rs, long addr)
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{
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if (!uasm_in_compat_space_p(addr)) {
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uasm_i_lui(buf, rs, uasm_rel_highest(addr));
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if (uasm_rel_higher(addr))
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uasm_i_daddiu(buf, rs, rs, uasm_rel_higher(addr));
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if (uasm_rel_hi(addr)) {
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uasm_i_dsll(buf, rs, rs, 16);
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uasm_i_daddiu(buf, rs, rs,
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uasm_rel_hi(addr));
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uasm_i_dsll(buf, rs, rs, 16);
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} else
|
|
uasm_i_dsll32(buf, rs, rs, 0);
|
|
} else
|
|
uasm_i_lui(buf, rs, uasm_rel_hi(addr));
|
|
}
|
|
UASM_EXPORT_SYMBOL(UASM_i_LA_mostly);
|
|
|
|
void UASM_i_LA(u32 **buf, unsigned int rs, long addr)
|
|
{
|
|
UASM_i_LA_mostly(buf, rs, addr);
|
|
if (uasm_rel_lo(addr)) {
|
|
if (!uasm_in_compat_space_p(addr))
|
|
uasm_i_daddiu(buf, rs, rs,
|
|
uasm_rel_lo(addr));
|
|
else
|
|
uasm_i_addiu(buf, rs, rs,
|
|
uasm_rel_lo(addr));
|
|
}
|
|
}
|
|
UASM_EXPORT_SYMBOL(UASM_i_LA);
|
|
|
|
/* Handle relocations. */
|
|
void uasm_r_mips_pc16(struct uasm_reloc **rel, u32 *addr, int lid)
|
|
{
|
|
(*rel)->addr = addr;
|
|
(*rel)->type = R_MIPS_PC16;
|
|
(*rel)->lab = lid;
|
|
(*rel)++;
|
|
}
|
|
UASM_EXPORT_SYMBOL(uasm_r_mips_pc16);
|
|
|
|
static inline void __resolve_relocs(struct uasm_reloc *rel,
|
|
struct uasm_label *lab);
|
|
|
|
void uasm_resolve_relocs(struct uasm_reloc *rel,
|
|
struct uasm_label *lab)
|
|
{
|
|
struct uasm_label *l;
|
|
|
|
for (; rel->lab != UASM_LABEL_INVALID; rel++)
|
|
for (l = lab; l->lab != UASM_LABEL_INVALID; l++)
|
|
if (rel->lab == l->lab)
|
|
__resolve_relocs(rel, l);
|
|
}
|
|
UASM_EXPORT_SYMBOL(uasm_resolve_relocs);
|
|
|
|
void uasm_move_relocs(struct uasm_reloc *rel, u32 *first, u32 *end,
|
|
long off)
|
|
{
|
|
for (; rel->lab != UASM_LABEL_INVALID; rel++)
|
|
if (rel->addr >= first && rel->addr < end)
|
|
rel->addr += off;
|
|
}
|
|
UASM_EXPORT_SYMBOL(uasm_move_relocs);
|
|
|
|
void uasm_move_labels(struct uasm_label *lab, u32 *first, u32 *end,
|
|
long off)
|
|
{
|
|
for (; lab->lab != UASM_LABEL_INVALID; lab++)
|
|
if (lab->addr >= first && lab->addr < end)
|
|
lab->addr += off;
|
|
}
|
|
UASM_EXPORT_SYMBOL(uasm_move_labels);
|
|
|
|
void uasm_copy_handler(struct uasm_reloc *rel, struct uasm_label *lab,
|
|
u32 *first, u32 *end, u32 *target)
|
|
{
|
|
long off = (long)(target - first);
|
|
|
|
memcpy(target, first, (end - first) * sizeof(u32));
|
|
|
|
uasm_move_relocs(rel, first, end, off);
|
|
uasm_move_labels(lab, first, end, off);
|
|
}
|
|
UASM_EXPORT_SYMBOL(uasm_copy_handler);
|
|
|
|
int uasm_insn_has_bdelay(struct uasm_reloc *rel, u32 *addr)
|
|
{
|
|
for (; rel->lab != UASM_LABEL_INVALID; rel++) {
|
|
if (rel->addr == addr
|
|
&& (rel->type == R_MIPS_PC16
|
|
|| rel->type == R_MIPS_26))
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
UASM_EXPORT_SYMBOL(uasm_insn_has_bdelay);
|
|
|
|
/* Convenience functions for labeled branches. */
|
|
void uasm_il_bltz(u32 **p, struct uasm_reloc **r, unsigned int reg,
|
|
int lid)
|
|
{
|
|
uasm_r_mips_pc16(r, *p, lid);
|
|
uasm_i_bltz(p, reg, 0);
|
|
}
|
|
UASM_EXPORT_SYMBOL(uasm_il_bltz);
|
|
|
|
void uasm_il_b(u32 **p, struct uasm_reloc **r, int lid)
|
|
{
|
|
uasm_r_mips_pc16(r, *p, lid);
|
|
uasm_i_b(p, 0);
|
|
}
|
|
UASM_EXPORT_SYMBOL(uasm_il_b);
|
|
|
|
void uasm_il_beq(u32 **p, struct uasm_reloc **r, unsigned int r1,
|
|
unsigned int r2, int lid)
|
|
{
|
|
uasm_r_mips_pc16(r, *p, lid);
|
|
uasm_i_beq(p, r1, r2, 0);
|
|
}
|
|
UASM_EXPORT_SYMBOL(uasm_il_beq);
|
|
|
|
void uasm_il_beqz(u32 **p, struct uasm_reloc **r, unsigned int reg,
|
|
int lid)
|
|
{
|
|
uasm_r_mips_pc16(r, *p, lid);
|
|
uasm_i_beqz(p, reg, 0);
|
|
}
|
|
UASM_EXPORT_SYMBOL(uasm_il_beqz);
|
|
|
|
void uasm_il_beqzl(u32 **p, struct uasm_reloc **r, unsigned int reg,
|
|
int lid)
|
|
{
|
|
uasm_r_mips_pc16(r, *p, lid);
|
|
uasm_i_beqzl(p, reg, 0);
|
|
}
|
|
UASM_EXPORT_SYMBOL(uasm_il_beqzl);
|
|
|
|
void uasm_il_bne(u32 **p, struct uasm_reloc **r, unsigned int reg1,
|
|
unsigned int reg2, int lid)
|
|
{
|
|
uasm_r_mips_pc16(r, *p, lid);
|
|
uasm_i_bne(p, reg1, reg2, 0);
|
|
}
|
|
UASM_EXPORT_SYMBOL(uasm_il_bne);
|
|
|
|
void uasm_il_bnez(u32 **p, struct uasm_reloc **r, unsigned int reg,
|
|
int lid)
|
|
{
|
|
uasm_r_mips_pc16(r, *p, lid);
|
|
uasm_i_bnez(p, reg, 0);
|
|
}
|
|
UASM_EXPORT_SYMBOL(uasm_il_bnez);
|
|
|
|
void uasm_il_bgezl(u32 **p, struct uasm_reloc **r, unsigned int reg,
|
|
int lid)
|
|
{
|
|
uasm_r_mips_pc16(r, *p, lid);
|
|
uasm_i_bgezl(p, reg, 0);
|
|
}
|
|
UASM_EXPORT_SYMBOL(uasm_il_bgezl);
|
|
|
|
void uasm_il_bgez(u32 **p, struct uasm_reloc **r, unsigned int reg,
|
|
int lid)
|
|
{
|
|
uasm_r_mips_pc16(r, *p, lid);
|
|
uasm_i_bgez(p, reg, 0);
|
|
}
|
|
UASM_EXPORT_SYMBOL(uasm_il_bgez);
|
|
|
|
void uasm_il_bbit0(u32 **p, struct uasm_reloc **r, unsigned int reg,
|
|
unsigned int bit, int lid)
|
|
{
|
|
uasm_r_mips_pc16(r, *p, lid);
|
|
uasm_i_bbit0(p, reg, bit, 0);
|
|
}
|
|
UASM_EXPORT_SYMBOL(uasm_il_bbit0);
|
|
|
|
void uasm_il_bbit1(u32 **p, struct uasm_reloc **r, unsigned int reg,
|
|
unsigned int bit, int lid)
|
|
{
|
|
uasm_r_mips_pc16(r, *p, lid);
|
|
uasm_i_bbit1(p, reg, bit, 0);
|
|
}
|
|
UASM_EXPORT_SYMBOL(uasm_il_bbit1);
|