arch/mips/mm/uasm.c - kernel/msm-4.19 - Gitiles

 /*
  * This file is subject to the terms and conditions of the GNU General Public
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
  * A small micro-assembler. It is intentionally kept simple, does only
  * support a subset of instructions, and does not try to hide pipeline
  * effects like branch delay slots.
  *
  * Copyright (C) 2004, 2005, 2006, 2008	 Thiemo Seufer
  * Copyright (C) 2005, 2007  Maciej W. Rozycki
  * Copyright (C) 2006  Ralf Baechle (ralf@linux-mips.org)
  * Copyright (C) 2012, 2013  MIPS Technologies, Inc.  All rights reserved.
  */

 enum fields {
 	RS = 0x001,
 	RT = 0x002,
 	RD = 0x004,
 	RE = 0x008,
 	SIMM = 0x010,
 	UIMM = 0x020,
 	BIMM = 0x040,
 	JIMM = 0x080,
 	FUNC = 0x100,
 	SET = 0x200,
 	SCIMM = 0x400,
 	SIMM9 = 0x800,
 };

 #define OP_MASK		0x3f
 #define OP_SH		26
 #define RD_MASK		0x1f
 #define RD_SH		11
 #define RE_MASK		0x1f
 #define RE_SH		6
 #define IMM_MASK	0xffff
 #define IMM_SH		0
 #define JIMM_MASK	0x3ffffff
 #define JIMM_SH		0
 #define FUNC_MASK	0x3f
 #define FUNC_SH		0
 #define SET_MASK	0x7
 #define SET_SH		0
 #define SIMM9_SH	7
 #define SIMM9_MASK	0x1ff

 enum opcode {
 	insn_invalid,
 	insn_addiu, insn_addu, insn_and, insn_andi, insn_bbit0, insn_bbit1,
 	insn_beq, insn_beql, insn_bgez, insn_bgezl, insn_bltz, insn_bltzl,
 	insn_bne, insn_cache, insn_daddiu, insn_daddu, insn_dins, insn_dinsm,
 	insn_divu, insn_dmfc0, insn_dmtc0, insn_drotr, insn_drotr32, insn_dsll,
 	insn_dsll32, insn_dsra, insn_dsrl, insn_dsrl32, insn_dsubu, insn_eret,
 	insn_ext, insn_ins, insn_j, insn_jal, insn_jalr, insn_jr, insn_lb,
 	insn_ld, insn_ldx, insn_lh, insn_ll, insn_lld, insn_lui, insn_lw,
 	insn_lwx, insn_mfc0, insn_mfhc0, insn_mfhi, insn_mflo, insn_mtc0,
 	insn_mthc0, insn_mul, insn_or, insn_ori, insn_pref, insn_rfe,
 	insn_rotr, insn_sc, insn_scd, insn_sd, insn_sll, insn_sllv, insn_slt,
 	insn_sltiu, insn_sltu, insn_sra, insn_srl, insn_srlv, insn_subu,
 	insn_sw, insn_sync, insn_syscall, insn_tlbp, insn_tlbr, insn_tlbwi,
 	insn_tlbwr, insn_wait, insn_wsbh, insn_xor, insn_xori, insn_yield,
 };

 struct insn {
 	enum opcode opcode;
 	u32 match;
 	enum fields fields;
 };

 static inline u32 build_rs(u32 arg)
 {
 	WARN(arg & ~RS_MASK, KERN_WARNING "Micro-assembler field overflow\n");

 	return (arg & RS_MASK) << RS_SH;
 }

 static inline u32 build_rt(u32 arg)
 {
 	WARN(arg & ~RT_MASK, KERN_WARNING "Micro-assembler field overflow\n");

 	return (arg & RT_MASK) << RT_SH;
 }

 static inline u32 build_rd(u32 arg)
 {
 	WARN(arg & ~RD_MASK, KERN_WARNING "Micro-assembler field overflow\n");

 	return (arg & RD_MASK) << RD_SH;
 }

 static inline u32 build_re(u32 arg)
 {
 	WARN(arg & ~RE_MASK, KERN_WARNING "Micro-assembler field overflow\n");

 	return (arg & RE_MASK) << RE_SH;
 }

 static inline u32 build_simm(s32 arg)
 {
 	WARN(arg > 0x7fff || arg < -0x8000,
 	     KERN_WARNING "Micro-assembler field overflow\n");

 	return arg & 0xffff;
 }

 static inline u32 build_uimm(u32 arg)
 {
 	WARN(arg & ~IMM_MASK, KERN_WARNING "Micro-assembler field overflow\n");

 	return arg & IMM_MASK;
 }

 static inline u32 build_scimm(u32 arg)
 {
 	WARN(arg & ~SCIMM_MASK,
 	     KERN_WARNING "Micro-assembler field overflow\n");

 	return (arg & SCIMM_MASK) << SCIMM_SH;
 }

 static inline u32 build_scimm9(s32 arg)
 {
 	WARN((arg > 0xff || arg < -0x100),
 	       KERN_WARNING "Micro-assembler field overflow\n");

 	return (arg & SIMM9_MASK) << SIMM9_SH;
 }

 static inline u32 build_func(u32 arg)
 {
 	WARN(arg & ~FUNC_MASK, KERN_WARNING "Micro-assembler field overflow\n");

 	return arg & FUNC_MASK;
 }

 static inline u32 build_set(u32 arg)
 {
 	WARN(arg & ~SET_MASK, KERN_WARNING "Micro-assembler field overflow\n");

 	return arg & SET_MASK;
 }

 static void build_insn(u32 **buf, enum opcode opc, ...);

 #define I_u1u2u3(op)					\
 Ip_u1u2u3(op)						\
 {							\
 	build_insn(buf, insn##op, a, b, c);		\
 }							\
 UASM_EXPORT_SYMBOL(uasm_i##op);

 #define I_s3s1s2(op)					\
 Ip_s3s1s2(op)						\
 {							\
 	build_insn(buf, insn##op, b, c, a);		\
 }							\
 UASM_EXPORT_SYMBOL(uasm_i##op);

 #define I_u2u1u3(op)					\
 Ip_u2u1u3(op)						\
 {							\
 	build_insn(buf, insn##op, b, a, c);		\
 }							\
 UASM_EXPORT_SYMBOL(uasm_i##op);

 #define I_u3u2u1(op)					\
 Ip_u3u2u1(op)						\
 {							\
 	build_insn(buf, insn##op, c, b, a);		\
 }							\
 UASM_EXPORT_SYMBOL(uasm_i##op);

 #define I_u3u1u2(op)					\
 Ip_u3u1u2(op)						\
 {							\
 	build_insn(buf, insn##op, b, c, a);		\
 }							\
 UASM_EXPORT_SYMBOL(uasm_i##op);

 #define I_u1u2s3(op)					\
 Ip_u1u2s3(op)						\
 {							\
 	build_insn(buf, insn##op, a, b, c);		\
 }							\
 UASM_EXPORT_SYMBOL(uasm_i##op);

 #define I_u2s3u1(op)					\
 Ip_u2s3u1(op)						\
 {							\
 	build_insn(buf, insn##op, c, a, b);		\
 }							\
 UASM_EXPORT_SYMBOL(uasm_i##op);

 #define I_u2u1s3(op)					\
 Ip_u2u1s3(op)						\
 {							\
 	build_insn(buf, insn##op, b, a, c);		\
 }							\
 UASM_EXPORT_SYMBOL(uasm_i##op);

 #define I_u2u1msbu3(op)					\
 Ip_u2u1msbu3(op)					\
 {							\
 	build_insn(buf, insn##op, b, a, c+d-1, c);	\
 }							\
 UASM_EXPORT_SYMBOL(uasm_i##op);

 #define I_u2u1msb32u3(op)				\
 Ip_u2u1msbu3(op)					\
 {							\
 	build_insn(buf, insn##op, b, a, c+d-33, c);	\
 }							\
 UASM_EXPORT_SYMBOL(uasm_i##op);

 #define I_u2u1msbdu3(op)				\
 Ip_u2u1msbu3(op)					\
 {							\
 	build_insn(buf, insn##op, b, a, d-1, c);	\
 }							\
 UASM_EXPORT_SYMBOL(uasm_i##op);

 #define I_u1u2(op)					\
 Ip_u1u2(op)						\
 {							\
 	build_insn(buf, insn##op, a, b);		\
 }							\
 UASM_EXPORT_SYMBOL(uasm_i##op);

 #define I_u2u1(op)					\
 Ip_u1u2(op)						\
 {							\
 	build_insn(buf, insn##op, b, a);		\
 }							\
 UASM_EXPORT_SYMBOL(uasm_i##op);

 #define I_u1s2(op)					\
 Ip_u1s2(op)						\
 {							\
 	build_insn(buf, insn##op, a, b);		\
 }							\
 UASM_EXPORT_SYMBOL(uasm_i##op);

 #define I_u1(op)					\
 Ip_u1(op)						\
 {							\
 	build_insn(buf, insn##op, a);			\
 }							\
 UASM_EXPORT_SYMBOL(uasm_i##op);

 #define I_0(op)						\
 Ip_0(op)						\
 {							\
 	build_insn(buf, insn##op);			\
 }							\
 UASM_EXPORT_SYMBOL(uasm_i##op);

 I_u2u1s3(_addiu)
 I_u3u1u2(_addu)
 I_u2u1u3(_andi)
 I_u3u1u2(_and)
 I_u1u2s3(_beq)
 I_u1u2s3(_beql)
 I_u1s2(_bgez)
 I_u1s2(_bgezl)
 I_u1s2(_bltz)
 I_u1s2(_bltzl)
 I_u1u2s3(_bne)
 I_u2s3u1(_cache)
 I_u1u2u3(_dmfc0)
 I_u1u2u3(_dmtc0)
 I_u2u1s3(_daddiu)
 I_u3u1u2(_daddu)
 I_u1u2(_divu)
 I_u2u1u3(_dsll)
 I_u2u1u3(_dsll32)
 I_u2u1u3(_dsra)
 I_u2u1u3(_dsrl)
 I_u2u1u3(_dsrl32)
 I_u2u1u3(_drotr)
 I_u2u1u3(_drotr32)
 I_u3u1u2(_dsubu)
 I_0(_eret)
 I_u2u1msbdu3(_ext)
 I_u2u1msbu3(_ins)
 I_u1(_j)
 I_u1(_jal)
 I_u2u1(_jalr)
 I_u1(_jr)
 I_u2s3u1(_lb)
 I_u2s3u1(_ld)
 I_u2s3u1(_lh)
 I_u2s3u1(_ll)
 I_u2s3u1(_lld)
 I_u1s2(_lui)
 I_u2s3u1(_lw)
 I_u1u2u3(_mfc0)
 I_u1u2u3(_mfhc0)
 I_u1(_mfhi)
 I_u1(_mflo)
 I_u1u2u3(_mtc0)
 I_u1u2u3(_mthc0)
 I_u3u1u2(_mul)
 I_u2u1u3(_ori)
 I_u3u1u2(_or)
 I_0(_rfe)
 I_u2s3u1(_sc)
 I_u2s3u1(_scd)
 I_u2s3u1(_sd)
 I_u2u1u3(_sll)
 I_u3u2u1(_sllv)
 I_s3s1s2(_slt)
 I_u2u1s3(_sltiu)
 I_u3u1u2(_sltu)
 I_u2u1u3(_sra)
 I_u2u1u3(_srl)
 I_u3u2u1(_srlv)
 I_u2u1u3(_rotr)
 I_u3u1u2(_subu)
 I_u2s3u1(_sw)
 I_u1(_sync)
 I_0(_tlbp)
 I_0(_tlbr)
 I_0(_tlbwi)
 I_0(_tlbwr)
 I_u1(_wait);
 I_u2u1(_wsbh)
 I_u3u1u2(_xor)
 I_u2u1u3(_xori)
 I_u2u1(_yield)
 I_u2u1msbu3(_dins);
 I_u2u1msb32u3(_dinsm);
 I_u1(_syscall);
 I_u1u2s3(_bbit0);
 I_u1u2s3(_bbit1);
 I_u3u1u2(_lwx)
 I_u3u1u2(_ldx)

 #ifdef CONFIG_CPU_CAVIUM_OCTEON
 #include <asm/octeon/octeon.h>
 void ISAFUNC(uasm_i_pref)(u32 **buf, unsigned int a, signed int b,
 			    unsigned int c)
 {
 	if (OCTEON_IS_MODEL(OCTEON_CN63XX_PASS1_X) && a <= 24 && a != 5)
 		/*
 		 * As per erratum Core-14449, replace prefetches 0-4,
 		 * 6-24 with 'pref 28'.
 		 */
 		build_insn(buf, insn_pref, c, 28, b);
 	else
 		build_insn(buf, insn_pref, c, a, b);
 }
 UASM_EXPORT_SYMBOL(ISAFUNC(uasm_i_pref));
 #else
 I_u2s3u1(_pref)
 #endif

 /* Handle labels. */
 void ISAFUNC(uasm_build_label)(struct uasm_label **lab, u32 *addr, int lid)
 {
 	(*lab)->addr = addr;
 	(*lab)->lab = lid;
 	(*lab)++;
 }
 UASM_EXPORT_SYMBOL(ISAFUNC(uasm_build_label));

 int ISAFUNC(uasm_in_compat_space_p)(long addr)
 {
 	/* Is this address in 32bit compat space? */
 #ifdef CONFIG_64BIT
 	return (((addr) & 0xffffffff00000000L) == 0xffffffff00000000L);
 #else
 	return 1;
 #endif
 }
 UASM_EXPORT_SYMBOL(ISAFUNC(uasm_in_compat_space_p));

 static int uasm_rel_highest(long val)
 {
 #ifdef CONFIG_64BIT
 	return ((((val + 0x800080008000L) >> 48) & 0xffff) ^ 0x8000) - 0x8000;
 #else
 	return 0;
 #endif
 }

 static int uasm_rel_higher(long val)
 {
 #ifdef CONFIG_64BIT
 	return ((((val + 0x80008000L) >> 32) & 0xffff) ^ 0x8000) - 0x8000;
 #else
 	return 0;
 #endif
 }

 int ISAFUNC(uasm_rel_hi)(long val)
 {
 	return ((((val + 0x8000L) >> 16) & 0xffff) ^ 0x8000) - 0x8000;
 }
 UASM_EXPORT_SYMBOL(ISAFUNC(uasm_rel_hi));

 int ISAFUNC(uasm_rel_lo)(long val)
 {
 	return ((val & 0xffff) ^ 0x8000) - 0x8000;
 }
 UASM_EXPORT_SYMBOL(ISAFUNC(uasm_rel_lo));

 void ISAFUNC(UASM_i_LA_mostly)(u32 **buf, unsigned int rs, long addr)
 {
 	if (!ISAFUNC(uasm_in_compat_space_p)(addr)) {
 		ISAFUNC(uasm_i_lui)(buf, rs, uasm_rel_highest(addr));
 		if (uasm_rel_higher(addr))
 			ISAFUNC(uasm_i_daddiu)(buf, rs, rs, uasm_rel_higher(addr));
 		if (ISAFUNC(uasm_rel_hi(addr))) {
 			ISAFUNC(uasm_i_dsll)(buf, rs, rs, 16);
 			ISAFUNC(uasm_i_daddiu)(buf, rs, rs,
 					ISAFUNC(uasm_rel_hi)(addr));
 			ISAFUNC(uasm_i_dsll)(buf, rs, rs, 16);
 		} else
 			ISAFUNC(uasm_i_dsll32)(buf, rs, rs, 0);
 	} else
 		ISAFUNC(uasm_i_lui)(buf, rs, ISAFUNC(uasm_rel_hi(addr)));
 }
 UASM_EXPORT_SYMBOL(ISAFUNC(UASM_i_LA_mostly));

 void ISAFUNC(UASM_i_LA)(u32 **buf, unsigned int rs, long addr)
 {
 	ISAFUNC(UASM_i_LA_mostly)(buf, rs, addr);
 	if (ISAFUNC(uasm_rel_lo(addr))) {
 		if (!ISAFUNC(uasm_in_compat_space_p)(addr))
 			ISAFUNC(uasm_i_daddiu)(buf, rs, rs,
 					ISAFUNC(uasm_rel_lo(addr)));
 		else
 			ISAFUNC(uasm_i_addiu)(buf, rs, rs,
 					ISAFUNC(uasm_rel_lo(addr)));
 	}
 }
 UASM_EXPORT_SYMBOL(ISAFUNC(UASM_i_LA));

 /* Handle relocations. */
 void ISAFUNC(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(ISAFUNC(uasm_r_mips_pc16));

 static inline void __resolve_relocs(struct uasm_reloc *rel,
 				    struct uasm_label *lab);

 void ISAFUNC(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(ISAFUNC(uasm_resolve_relocs));

 void ISAFUNC(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(ISAFUNC(uasm_move_relocs));

 void ISAFUNC(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(ISAFUNC(uasm_move_labels));

 void ISAFUNC(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));

 	ISAFUNC(uasm_move_relocs(rel, first, end, off));
 	ISAFUNC(uasm_move_labels(lab, first, end, off));
 }
 UASM_EXPORT_SYMBOL(ISAFUNC(uasm_copy_handler));

 int ISAFUNC(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(ISAFUNC(uasm_insn_has_bdelay));

 /* Convenience functions for labeled branches. */
 void ISAFUNC(uasm_il_bltz)(u32 **p, struct uasm_reloc **r, unsigned int reg,
 			   int lid)
 {
 	uasm_r_mips_pc16(r, *p, lid);
 	ISAFUNC(uasm_i_bltz)(p, reg, 0);
 }
 UASM_EXPORT_SYMBOL(ISAFUNC(uasm_il_bltz));

 void ISAFUNC(uasm_il_b)(u32 **p, struct uasm_reloc **r, int lid)
 {
 	uasm_r_mips_pc16(r, *p, lid);
 	ISAFUNC(uasm_i_b)(p, 0);
 }
 UASM_EXPORT_SYMBOL(ISAFUNC(uasm_il_b));

 void ISAFUNC(uasm_il_beq)(u32 **p, struct uasm_reloc **r, unsigned int r1,
 			  unsigned int r2, int lid)
 {
 	uasm_r_mips_pc16(r, *p, lid);
 	ISAFUNC(uasm_i_beq)(p, r1, r2, 0);
 }
 UASM_EXPORT_SYMBOL(ISAFUNC(uasm_il_beq));

 void ISAFUNC(uasm_il_beqz)(u32 **p, struct uasm_reloc **r, unsigned int reg,
 			   int lid)
 {
 	uasm_r_mips_pc16(r, *p, lid);
 	ISAFUNC(uasm_i_beqz)(p, reg, 0);
 }
 UASM_EXPORT_SYMBOL(ISAFUNC(uasm_il_beqz));

 void ISAFUNC(uasm_il_beqzl)(u32 **p, struct uasm_reloc **r, unsigned int reg,
 			    int lid)
 {
 	uasm_r_mips_pc16(r, *p, lid);
 	ISAFUNC(uasm_i_beqzl)(p, reg, 0);
 }
 UASM_EXPORT_SYMBOL(ISAFUNC(uasm_il_beqzl));

 void ISAFUNC(uasm_il_bne)(u32 **p, struct uasm_reloc **r, unsigned int reg1,
 			  unsigned int reg2, int lid)
 {
 	uasm_r_mips_pc16(r, *p, lid);
 	ISAFUNC(uasm_i_bne)(p, reg1, reg2, 0);
 }
 UASM_EXPORT_SYMBOL(ISAFUNC(uasm_il_bne));

 void ISAFUNC(uasm_il_bnez)(u32 **p, struct uasm_reloc **r, unsigned int reg,
 			   int lid)
 {
 	uasm_r_mips_pc16(r, *p, lid);
 	ISAFUNC(uasm_i_bnez)(p, reg, 0);
 }
 UASM_EXPORT_SYMBOL(ISAFUNC(uasm_il_bnez));

 void ISAFUNC(uasm_il_bgezl)(u32 **p, struct uasm_reloc **r, unsigned int reg,
 			    int lid)
 {
 	uasm_r_mips_pc16(r, *p, lid);
 	ISAFUNC(uasm_i_bgezl)(p, reg, 0);
 }
 UASM_EXPORT_SYMBOL(ISAFUNC(uasm_il_bgezl));

 void ISAFUNC(uasm_il_bgez)(u32 **p, struct uasm_reloc **r, unsigned int reg,
 			   int lid)
 {
 	uasm_r_mips_pc16(r, *p, lid);
 	ISAFUNC(uasm_i_bgez)(p, reg, 0);
 }
 UASM_EXPORT_SYMBOL(ISAFUNC(uasm_il_bgez));

 void ISAFUNC(uasm_il_bbit0)(u32 **p, struct uasm_reloc **r, unsigned int reg,
 			    unsigned int bit, int lid)
 {
 	uasm_r_mips_pc16(r, *p, lid);
 	ISAFUNC(uasm_i_bbit0)(p, reg, bit, 0);
 }
 UASM_EXPORT_SYMBOL(ISAFUNC(uasm_il_bbit0));

 void ISAFUNC(uasm_il_bbit1)(u32 **p, struct uasm_reloc **r, unsigned int reg,
 			    unsigned int bit, int lid)
 {
 	uasm_r_mips_pc16(r, *p, lid);
 	ISAFUNC(uasm_i_bbit1)(p, reg, bit, 0);
 }
 UASM_EXPORT_SYMBOL(ISAFUNC(uasm_il_bbit1));
	/*
	* This file is subject to the terms and conditions of the GNU General Public
	* License. See the file "COPYING" in the main directory of this archive
	* for more details.
	*
	* A small micro-assembler. It is intentionally kept simple, does only
	* support a subset of instructions, and does not try to hide pipeline
	* effects like branch delay slots.
	*
	* Copyright (C) 2004, 2005, 2006, 2008 Thiemo Seufer
	* Copyright (C) 2005, 2007 Maciej W. Rozycki
	* Copyright (C) 2006 Ralf Baechle (ralf@linux-mips.org)
	* Copyright (C) 2012, 2013 MIPS Technologies, Inc. All rights reserved.
	*/

	enum fields {
	RS = 0x001,
	RT = 0x002,
	RD = 0x004,
	RE = 0x008,
	SIMM = 0x010,
	UIMM = 0x020,
	BIMM = 0x040,
	JIMM = 0x080,
	FUNC = 0x100,
	SET = 0x200,
	SCIMM = 0x400,
	SIMM9 = 0x800,
	};

	#define OP_MASK 0x3f
	#define OP_SH 26
	#define RD_MASK 0x1f
	#define RD_SH 11
	#define RE_MASK 0x1f
	#define RE_SH 6
	#define IMM_MASK 0xffff
	#define IMM_SH 0
	#define JIMM_MASK 0x3ffffff
	#define JIMM_SH 0
	#define FUNC_MASK 0x3f
	#define FUNC_SH 0
	#define SET_MASK 0x7
	#define SET_SH 0
	#define SIMM9_SH 7
	#define SIMM9_MASK 0x1ff

	enum opcode {
	insn_invalid,
	insn_addiu, insn_addu, insn_and, insn_andi, insn_bbit0, insn_bbit1,
	insn_beq, insn_beql, insn_bgez, insn_bgezl, insn_bltz, insn_bltzl,
	insn_bne, insn_cache, insn_daddiu, insn_daddu, insn_dins, insn_dinsm,
	insn_divu, insn_dmfc0, insn_dmtc0, insn_drotr, insn_drotr32, insn_dsll,
	insn_dsll32, insn_dsra, insn_dsrl, insn_dsrl32, insn_dsubu, insn_eret,
	insn_ext, insn_ins, insn_j, insn_jal, insn_jalr, insn_jr, insn_lb,
	insn_ld, insn_ldx, insn_lh, insn_ll, insn_lld, insn_lui, insn_lw,
	insn_lwx, insn_mfc0, insn_mfhc0, insn_mfhi, insn_mflo, insn_mtc0,
	insn_mthc0, insn_mul, insn_or, insn_ori, insn_pref, insn_rfe,
	insn_rotr, insn_sc, insn_scd, insn_sd, insn_sll, insn_sllv, insn_slt,
	insn_sltiu, insn_sltu, insn_sra, insn_srl, insn_srlv, insn_subu,
	insn_sw, insn_sync, insn_syscall, insn_tlbp, insn_tlbr, insn_tlbwi,
	insn_tlbwr, insn_wait, insn_wsbh, insn_xor, insn_xori, insn_yield,
	};

	struct insn {
	enum opcode opcode;
	u32 match;
	enum fields fields;
	};

	static inline u32 build_rs(u32 arg)
	{
	WARN(arg & ~RS_MASK, KERN_WARNING "Micro-assembler field overflow\n");

	return (arg & RS_MASK) << RS_SH;
	}

	static inline u32 build_rt(u32 arg)
	{
	WARN(arg & ~RT_MASK, KERN_WARNING "Micro-assembler field overflow\n");

	return (arg & RT_MASK) << RT_SH;
	}

	static inline u32 build_rd(u32 arg)
	{
	WARN(arg & ~RD_MASK, KERN_WARNING "Micro-assembler field overflow\n");

	return (arg & RD_MASK) << RD_SH;
	}

	static inline u32 build_re(u32 arg)
	{
	WARN(arg & ~RE_MASK, KERN_WARNING "Micro-assembler field overflow\n");

	return (arg & RE_MASK) << RE_SH;
	}

	static inline u32 build_simm(s32 arg)
	{
	WARN(arg > 0x7fff \|\| arg < -0x8000,
	KERN_WARNING "Micro-assembler field overflow\n");

	return arg & 0xffff;
	}

	static inline u32 build_uimm(u32 arg)
	{
	WARN(arg & ~IMM_MASK, KERN_WARNING "Micro-assembler field overflow\n");

	return arg & IMM_MASK;
	}

	static inline u32 build_scimm(u32 arg)
	{
	WARN(arg & ~SCIMM_MASK,
	KERN_WARNING "Micro-assembler field overflow\n");

	return (arg & SCIMM_MASK) << SCIMM_SH;
	}

	static inline u32 build_scimm9(s32 arg)
	{
	WARN((arg > 0xff \|\| arg < -0x100),
	KERN_WARNING "Micro-assembler field overflow\n");

	return (arg & SIMM9_MASK) << SIMM9_SH;
	}

	static inline u32 build_func(u32 arg)
	{
	WARN(arg & ~FUNC_MASK, KERN_WARNING "Micro-assembler field overflow\n");

	return arg & FUNC_MASK;
	}

	static inline u32 build_set(u32 arg)
	{
	WARN(arg & ~SET_MASK, KERN_WARNING "Micro-assembler field overflow\n");

	return arg & SET_MASK;
	}

	static void build_insn(u32 **buf, enum opcode opc, ...);

	#define I_u1u2u3(op) \
	Ip_u1u2u3(op) \
	{ \
	build_insn(buf, insn##op, a, b, c); \
	} \
	UASM_EXPORT_SYMBOL(uasm_i##op);

	#define I_s3s1s2(op) \
	Ip_s3s1s2(op) \
	{ \
	build_insn(buf, insn##op, b, c, a); \
	} \
	UASM_EXPORT_SYMBOL(uasm_i##op);

	#define I_u2u1u3(op) \
	Ip_u2u1u3(op) \
	{ \
	build_insn(buf, insn##op, b, a, c); \
	} \
	UASM_EXPORT_SYMBOL(uasm_i##op);

	#define I_u3u2u1(op) \
	Ip_u3u2u1(op) \
	{ \
	build_insn(buf, insn##op, c, b, a); \
	} \
	UASM_EXPORT_SYMBOL(uasm_i##op);

	#define I_u3u1u2(op) \
	Ip_u3u1u2(op) \
	{ \
	build_insn(buf, insn##op, b, c, a); \
	} \
	UASM_EXPORT_SYMBOL(uasm_i##op);

	#define I_u1u2s3(op) \
	Ip_u1u2s3(op) \
	{ \
	build_insn(buf, insn##op, a, b, c); \
	} \
	UASM_EXPORT_SYMBOL(uasm_i##op);

	#define I_u2s3u1(op) \
	Ip_u2s3u1(op) \
	{ \
	build_insn(buf, insn##op, c, a, b); \
	} \
	UASM_EXPORT_SYMBOL(uasm_i##op);

	#define I_u2u1s3(op) \
	Ip_u2u1s3(op) \
	{ \
	build_insn(buf, insn##op, b, a, c); \
	} \
	UASM_EXPORT_SYMBOL(uasm_i##op);

	#define I_u2u1msbu3(op) \
	Ip_u2u1msbu3(op) \
	{ \
	build_insn(buf, insn##op, b, a, c+d-1, c); \
	} \
	UASM_EXPORT_SYMBOL(uasm_i##op);

	#define I_u2u1msb32u3(op) \
	Ip_u2u1msbu3(op) \
	{ \
	build_insn(buf, insn##op, b, a, c+d-33, c); \
	} \
	UASM_EXPORT_SYMBOL(uasm_i##op);

	#define I_u2u1msbdu3(op) \
	Ip_u2u1msbu3(op) \
	{ \
	build_insn(buf, insn##op, b, a, d-1, c); \
	} \
	UASM_EXPORT_SYMBOL(uasm_i##op);

	#define I_u1u2(op) \
	Ip_u1u2(op) \
	{ \
	build_insn(buf, insn##op, a, b); \
	} \
	UASM_EXPORT_SYMBOL(uasm_i##op);

	#define I_u2u1(op) \
	Ip_u1u2(op) \
	{ \
	build_insn(buf, insn##op, b, a); \
	} \
	UASM_EXPORT_SYMBOL(uasm_i##op);

	#define I_u1s2(op) \
	Ip_u1s2(op) \
	{ \
	build_insn(buf, insn##op, a, b); \
	} \
	UASM_EXPORT_SYMBOL(uasm_i##op);

	#define I_u1(op) \
	Ip_u1(op) \
	{ \
	build_insn(buf, insn##op, a); \
	} \
	UASM_EXPORT_SYMBOL(uasm_i##op);

	#define I_0(op) \
	Ip_0(op) \
	{ \
	build_insn(buf, insn##op); \
	} \
	UASM_EXPORT_SYMBOL(uasm_i##op);

	I_u2u1s3(_addiu)
	I_u3u1u2(_addu)
	I_u2u1u3(_andi)
	I_u3u1u2(_and)
	I_u1u2s3(_beq)
	I_u1u2s3(_beql)
	I_u1s2(_bgez)
	I_u1s2(_bgezl)
	I_u1s2(_bltz)
	I_u1s2(_bltzl)
	I_u1u2s3(_bne)
	I_u2s3u1(_cache)
	I_u1u2u3(_dmfc0)
	I_u1u2u3(_dmtc0)
	I_u2u1s3(_daddiu)
	I_u3u1u2(_daddu)
	I_u1u2(_divu)
	I_u2u1u3(_dsll)
	I_u2u1u3(_dsll32)
	I_u2u1u3(_dsra)
	I_u2u1u3(_dsrl)
	I_u2u1u3(_dsrl32)
	I_u2u1u3(_drotr)
	I_u2u1u3(_drotr32)
	I_u3u1u2(_dsubu)
	I_0(_eret)
	I_u2u1msbdu3(_ext)
	I_u2u1msbu3(_ins)
	I_u1(_j)
	I_u1(_jal)
	I_u2u1(_jalr)
	I_u1(_jr)
	I_u2s3u1(_lb)
	I_u2s3u1(_ld)
	I_u2s3u1(_lh)
	I_u2s3u1(_ll)
	I_u2s3u1(_lld)
	I_u1s2(_lui)
	I_u2s3u1(_lw)
	I_u1u2u3(_mfc0)
	I_u1u2u3(_mfhc0)
	I_u1(_mfhi)
	I_u1(_mflo)
	I_u1u2u3(_mtc0)
	I_u1u2u3(_mthc0)
	I_u3u1u2(_mul)
	I_u2u1u3(_ori)
	I_u3u1u2(_or)
	I_0(_rfe)
	I_u2s3u1(_sc)
	I_u2s3u1(_scd)
	I_u2s3u1(_sd)
	I_u2u1u3(_sll)
	I_u3u2u1(_sllv)
	I_s3s1s2(_slt)
	I_u2u1s3(_sltiu)
	I_u3u1u2(_sltu)
	I_u2u1u3(_sra)
	I_u2u1u3(_srl)
	I_u3u2u1(_srlv)
	I_u2u1u3(_rotr)
	I_u3u1u2(_subu)
	I_u2s3u1(_sw)
	I_u1(_sync)
	I_0(_tlbp)
	I_0(_tlbr)
	I_0(_tlbwi)
	I_0(_tlbwr)
	I_u1(_wait);
	I_u2u1(_wsbh)
	I_u3u1u2(_xor)
	I_u2u1u3(_xori)
	I_u2u1(_yield)
	I_u2u1msbu3(_dins);
	I_u2u1msb32u3(_dinsm);
	I_u1(_syscall);
	I_u1u2s3(_bbit0);
	I_u1u2s3(_bbit1);
	I_u3u1u2(_lwx)
	I_u3u1u2(_ldx)

	#ifdef CONFIG_CPU_CAVIUM_OCTEON
	#include <asm/octeon/octeon.h>
	void ISAFUNC(uasm_i_pref)(u32 **buf, unsigned int a, signed int b,
	unsigned int c)
	{
	if (OCTEON_IS_MODEL(OCTEON_CN63XX_PASS1_X) && a <= 24 && a != 5)
	/*
	* As per erratum Core-14449, replace prefetches 0-4,
	* 6-24 with 'pref 28'.
	*/
	build_insn(buf, insn_pref, c, 28, b);
	else
	build_insn(buf, insn_pref, c, a, b);
	}
	UASM_EXPORT_SYMBOL(ISAFUNC(uasm_i_pref));
	#else
	I_u2s3u1(_pref)
	#endif

	/* Handle labels. */
	void ISAFUNC(uasm_build_label)(struct uasm_label *lab, u32 addr, int lid)
	{
	(*lab)->addr = addr;
	(*lab)->lab = lid;
	(*lab)++;
	}
	UASM_EXPORT_SYMBOL(ISAFUNC(uasm_build_label));

	int ISAFUNC(uasm_in_compat_space_p)(long addr)
	{
	/* Is this address in 32bit compat space? */
	#ifdef CONFIG_64BIT
	return (((addr) & 0xffffffff00000000L) == 0xffffffff00000000L);
	#else
	return 1;
	#endif
	}
	UASM_EXPORT_SYMBOL(ISAFUNC(uasm_in_compat_space_p));

	static int uasm_rel_highest(long val)
	{
	#ifdef CONFIG_64BIT
	return ((((val + 0x800080008000L) >> 48) & 0xffff) ^ 0x8000) - 0x8000;
	#else
	return 0;
	#endif
	}

	static int uasm_rel_higher(long val)
	{
	#ifdef CONFIG_64BIT
	return ((((val + 0x80008000L) >> 32) & 0xffff) ^ 0x8000) - 0x8000;
	#else
	return 0;
	#endif
	}

	int ISAFUNC(uasm_rel_hi)(long val)
	{
	return ((((val + 0x8000L) >> 16) & 0xffff) ^ 0x8000) - 0x8000;
	}
	UASM_EXPORT_SYMBOL(ISAFUNC(uasm_rel_hi));

	int ISAFUNC(uasm_rel_lo)(long val)
	{
	return ((val & 0xffff) ^ 0x8000) - 0x8000;
	}
	UASM_EXPORT_SYMBOL(ISAFUNC(uasm_rel_lo));

	void ISAFUNC(UASM_i_LA_mostly)(u32 **buf, unsigned int rs, long addr)
	{
	if (!ISAFUNC(uasm_in_compat_space_p)(addr)) {
	ISAFUNC(uasm_i_lui)(buf, rs, uasm_rel_highest(addr));
	if (uasm_rel_higher(addr))
	ISAFUNC(uasm_i_daddiu)(buf, rs, rs, uasm_rel_higher(addr));
	if (ISAFUNC(uasm_rel_hi(addr))) {
	ISAFUNC(uasm_i_dsll)(buf, rs, rs, 16);
	ISAFUNC(uasm_i_daddiu)(buf, rs, rs,
	ISAFUNC(uasm_rel_hi)(addr));
	ISAFUNC(uasm_i_dsll)(buf, rs, rs, 16);
	} else
	ISAFUNC(uasm_i_dsll32)(buf, rs, rs, 0);
	} else
	ISAFUNC(uasm_i_lui)(buf, rs, ISAFUNC(uasm_rel_hi(addr)));
	}
	UASM_EXPORT_SYMBOL(ISAFUNC(UASM_i_LA_mostly));

	void ISAFUNC(UASM_i_LA)(u32 **buf, unsigned int rs, long addr)
	{
	ISAFUNC(UASM_i_LA_mostly)(buf, rs, addr);
	if (ISAFUNC(uasm_rel_lo(addr))) {
	if (!ISAFUNC(uasm_in_compat_space_p)(addr))
	ISAFUNC(uasm_i_daddiu)(buf, rs, rs,
	ISAFUNC(uasm_rel_lo(addr)));
	else
	ISAFUNC(uasm_i_addiu)(buf, rs, rs,
	ISAFUNC(uasm_rel_lo(addr)));
	}
	}
	UASM_EXPORT_SYMBOL(ISAFUNC(UASM_i_LA));

	/* Handle relocations. */
	void ISAFUNC(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(ISAFUNC(uasm_r_mips_pc16));

	static inline void __resolve_relocs(struct uasm_reloc *rel,
	struct uasm_label *lab);

	void ISAFUNC(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(ISAFUNC(uasm_resolve_relocs));

	void ISAFUNC(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(ISAFUNC(uasm_move_relocs));

	void ISAFUNC(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(ISAFUNC(uasm_move_labels));

	void ISAFUNC(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));

	ISAFUNC(uasm_move_relocs(rel, first, end, off));
	ISAFUNC(uasm_move_labels(lab, first, end, off));
	}
	UASM_EXPORT_SYMBOL(ISAFUNC(uasm_copy_handler));

	int ISAFUNC(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(ISAFUNC(uasm_insn_has_bdelay));

	/* Convenience functions for labeled branches. */
	void ISAFUNC(uasm_il_bltz)(u32 p, struct uasm_reloc r, unsigned int reg,
	int lid)
	{
	uasm_r_mips_pc16(r, *p, lid);
	ISAFUNC(uasm_i_bltz)(p, reg, 0);
	}
	UASM_EXPORT_SYMBOL(ISAFUNC(uasm_il_bltz));

	void ISAFUNC(uasm_il_b)(u32 p, struct uasm_reloc r, int lid)
	{
	uasm_r_mips_pc16(r, *p, lid);
	ISAFUNC(uasm_i_b)(p, 0);
	}
	UASM_EXPORT_SYMBOL(ISAFUNC(uasm_il_b));

	void ISAFUNC(uasm_il_beq)(u32 p, struct uasm_reloc r, unsigned int r1,
	unsigned int r2, int lid)
	{
	uasm_r_mips_pc16(r, *p, lid);
	ISAFUNC(uasm_i_beq)(p, r1, r2, 0);
	}
	UASM_EXPORT_SYMBOL(ISAFUNC(uasm_il_beq));

	void ISAFUNC(uasm_il_beqz)(u32 p, struct uasm_reloc r, unsigned int reg,
	int lid)
	{
	uasm_r_mips_pc16(r, *p, lid);
	ISAFUNC(uasm_i_beqz)(p, reg, 0);
	}
	UASM_EXPORT_SYMBOL(ISAFUNC(uasm_il_beqz));

	void ISAFUNC(uasm_il_beqzl)(u32 p, struct uasm_reloc r, unsigned int reg,
	int lid)
	{
	uasm_r_mips_pc16(r, *p, lid);
	ISAFUNC(uasm_i_beqzl)(p, reg, 0);
	}
	UASM_EXPORT_SYMBOL(ISAFUNC(uasm_il_beqzl));

	void ISAFUNC(uasm_il_bne)(u32 p, struct uasm_reloc r, unsigned int reg1,
	unsigned int reg2, int lid)
	{
	uasm_r_mips_pc16(r, *p, lid);
	ISAFUNC(uasm_i_bne)(p, reg1, reg2, 0);
	}
	UASM_EXPORT_SYMBOL(ISAFUNC(uasm_il_bne));

	void ISAFUNC(uasm_il_bnez)(u32 p, struct uasm_reloc r, unsigned int reg,
	int lid)
	{
	uasm_r_mips_pc16(r, *p, lid);
	ISAFUNC(uasm_i_bnez)(p, reg, 0);
	}
	UASM_EXPORT_SYMBOL(ISAFUNC(uasm_il_bnez));

	void ISAFUNC(uasm_il_bgezl)(u32 p, struct uasm_reloc r, unsigned int reg,
	int lid)
	{
	uasm_r_mips_pc16(r, *p, lid);
	ISAFUNC(uasm_i_bgezl)(p, reg, 0);
	}
	UASM_EXPORT_SYMBOL(ISAFUNC(uasm_il_bgezl));

	void ISAFUNC(uasm_il_bgez)(u32 p, struct uasm_reloc r, unsigned int reg,
	int lid)
	{
	uasm_r_mips_pc16(r, *p, lid);
	ISAFUNC(uasm_i_bgez)(p, reg, 0);
	}
	UASM_EXPORT_SYMBOL(ISAFUNC(uasm_il_bgez));

	void ISAFUNC(uasm_il_bbit0)(u32 p, struct uasm_reloc r, unsigned int reg,
	unsigned int bit, int lid)
	{
	uasm_r_mips_pc16(r, *p, lid);
	ISAFUNC(uasm_i_bbit0)(p, reg, bit, 0);
	}
	UASM_EXPORT_SYMBOL(ISAFUNC(uasm_il_bbit0));

	void ISAFUNC(uasm_il_bbit1)(u32 p, struct uasm_reloc r, unsigned int reg,
	unsigned int bit, int lid)
	{
	uasm_r_mips_pc16(r, *p, lid);
	ISAFUNC(uasm_i_bbit1)(p, reg, bit, 0);
	}
	UASM_EXPORT_SYMBOL(ISAFUNC(uasm_il_bbit1));