arch/mips/include/asm/asm.h - linux - Git at Google

 /*
  * 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.
  *
  * Copyright (C) 1995, 1996, 1997, 1999, 2001 by Ralf Baechle
  * Copyright (C) 1999 by Silicon Graphics, Inc.
  * Copyright (C) 2001 MIPS Technologies, Inc.
  * Copyright (C) 2002  Maciej W. Rozycki
  *
  * Some useful macros for MIPS assembler code
  *
  * Some of the routines below contain useless nops that will be optimized
  * away by gas in -O mode. These nops are however required to fill delay
  * slots in noreorder mode.
  */
 #ifndef __ASM_ASM_H
 #define __ASM_ASM_H

 #include <asm/sgidefs.h>
 #include <asm/asm-eva.h>
 #include <asm/isa-rev.h>

 #ifndef __VDSO__
 /*
  * Emit CFI data in .debug_frame sections, not .eh_frame sections.
  * We don't do DWARF unwinding at runtime, so only the offline DWARF
  * information is useful to anyone. Note we should change this if we
  * ever decide to enable DWARF unwinding at runtime.
  */
 #define CFI_SECTIONS	.cfi_sections .debug_frame
 #else
  /*
   * For the vDSO, emit both runtime unwind information and debug
   * symbols for the .dbg file.
   */
 #define CFI_SECTIONS
 #endif

 #ifdef __ASSEMBLY__
 /*
  * LEAF - declare leaf routine
  */
 #define LEAF(symbol)					\
 		CFI_SECTIONS;				\
 		.globl	symbol;				\
 		.align	2;				\
 		.type	symbol, @function;		\
 		.ent	symbol, 0;			\
 symbol:		.frame	sp, 0, ra;			\
 		.cfi_startproc;				\
 		.insn

 /*
  * NESTED - declare nested routine entry point
  */
 #define NESTED(symbol, framesize, rpc)			\
 		CFI_SECTIONS;				\
 		.globl	symbol;				\
 		.align	2;				\
 		.type	symbol, @function;		\
 		.ent	symbol, 0;			\
 symbol:		.frame	sp, framesize, rpc;		\
 		.cfi_startproc;				\
 		.insn

 /*
  * END - mark end of function
  */
 #define END(function)					\
 		.cfi_endproc;				\
 		.end	function;			\
 		.size	function, .-function

 /*
  * EXPORT - export definition of symbol
  */
 #define EXPORT(symbol)					\
 		.globl	symbol;				\
 symbol:

 /*
  * FEXPORT - export definition of a function symbol
  */
 #define FEXPORT(symbol)					\
 		.globl	symbol;				\
 		.type	symbol, @function;		\
 symbol:		.insn

 /*
  * ABS - export absolute symbol
  */
 #define ABS(symbol,value)				\
 		.globl	symbol;				\
 symbol		=	value

 #define TEXT(msg)					\
 		.pushsection .data;			\
 8:		.asciiz msg;				\
 		.popsection;

 #define ASM_PANIC(msg)					\
 		.set	push;				\
 		.set	reorder;			\
 		PTR_LA	a0, 8f;				\
 		jal	panic;				\
 9:		b	9b;				\
 		.set	pop;				\
 		TEXT(msg)

 /*
  * Print formatted string
  */
 #ifdef CONFIG_PRINTK
 #define ASM_PRINT(string)				\
 		.set	push;				\
 		.set	reorder;			\
 		PTR_LA	a0, 8f;				\
 		jal	_printk;			\
 		.set	pop;				\
 		TEXT(string)
 #else
 #define ASM_PRINT(string)
 #endif

 #endif /* __ASSEMBLY__ */

 /*
  * Stack alignment
  */
 #if (_MIPS_SIM == _MIPS_SIM_ABI32)
 #define ALSZ	7
 #define ALMASK	~7
 #endif
 #if (_MIPS_SIM == _MIPS_SIM_NABI32) || (_MIPS_SIM == _MIPS_SIM_ABI64)
 #define ALSZ	15
 #define ALMASK	~15
 #endif

 /*
  * Macros to handle different pointer/register sizes for 32/64-bit code
  */

 /*
  * Size of a register
  */
 #ifdef __mips64
 #define SZREG	8
 #else
 #define SZREG	4
 #endif

 /*
  * Use the following macros in assemblercode to load/store registers,
  * pointers etc.
  */
 #if (_MIPS_SIM == _MIPS_SIM_ABI32)
 #define REG_S		sw
 #define REG_L		lw
 #define REG_SUBU	subu
 #define REG_ADDU	addu
 #endif
 #if (_MIPS_SIM == _MIPS_SIM_NABI32) || (_MIPS_SIM == _MIPS_SIM_ABI64)
 #define REG_S		sd
 #define REG_L		ld
 #define REG_SUBU	dsubu
 #define REG_ADDU	daddu
 #endif

 /*
  * How to add/sub/load/store/shift C int variables.
  */
 #if (_MIPS_SZINT == 32)
 #define INT_ADD		add
 #define INT_ADDU	addu
 #define INT_ADDI	addi
 #define INT_ADDIU	addiu
 #define INT_SUB		sub
 #define INT_SUBU	subu
 #define INT_L		lw
 #define INT_S		sw
 #define INT_SLL		sll
 #define INT_SLLV	sllv
 #define INT_SRL		srl
 #define INT_SRLV	srlv
 #define INT_SRA		sra
 #define INT_SRAV	srav
 #endif

 #if (_MIPS_SZINT == 64)
 #define INT_ADD		dadd
 #define INT_ADDU	daddu
 #define INT_ADDI	daddi
 #define INT_ADDIU	daddiu
 #define INT_SUB		dsub
 #define INT_SUBU	dsubu
 #define INT_L		ld
 #define INT_S		sd
 #define INT_SLL		dsll
 #define INT_SLLV	dsllv
 #define INT_SRL		dsrl
 #define INT_SRLV	dsrlv
 #define INT_SRA		dsra
 #define INT_SRAV	dsrav
 #endif

 /*
  * How to add/sub/load/store/shift C long variables.
  */
 #if (_MIPS_SZLONG == 32)
 #define LONG_ADD	add
 #define LONG_ADDU	addu
 #define LONG_ADDI	addi
 #define LONG_ADDIU	addiu
 #define LONG_SUB	sub
 #define LONG_SUBU	subu
 #define LONG_L		lw
 #define LONG_LL		ll
 #define LONG_SC		sc
 #define LONG_S		sw
 #define LONG_SP		swp
 #define LONG_SLL	sll
 #define LONG_SLLV	sllv
 #define LONG_SRL	srl
 #define LONG_SRLV	srlv
 #define LONG_SRA	sra
 #define LONG_SRAV	srav
 #define LONG_INS	ins
 #define LONG_EXT	ext

 #ifdef __ASSEMBLY__
 #define LONG		.word
 #endif
 #define LONGSIZE	4
 #define LONGMASK	3
 #define LONGLOG		2
 #endif

 #if (_MIPS_SZLONG == 64)
 #define LONG_ADD	dadd
 #define LONG_ADDU	daddu
 #define LONG_ADDI	daddi
 #define LONG_ADDIU	daddiu
 #define LONG_SUB	dsub
 #define LONG_SUBU	dsubu
 #define LONG_L		ld
 #define LONG_LL		lld
 #define LONG_SC		scd
 #define LONG_S		sd
 #define LONG_SP		sdp
 #define LONG_SLL	dsll
 #define LONG_SLLV	dsllv
 #define LONG_SRL	dsrl
 #define LONG_SRLV	dsrlv
 #define LONG_SRA	dsra
 #define LONG_SRAV	dsrav
 #define LONG_INS	dins
 #define LONG_EXT	dext

 #ifdef __ASSEMBLY__
 #define LONG		.dword
 #endif
 #define LONGSIZE	8
 #define LONGMASK	7
 #define LONGLOG		3
 #endif

 /*
  * How to add/sub/load/store/shift pointers.
  */
 #if (_MIPS_SZPTR == 32)
 #define PTR_ADD		add
 #define PTR_ADDU	addu
 #define PTR_ADDI	addi
 #define PTR_ADDIU	addiu
 #define PTR_SUB		sub
 #define PTR_SUBU	subu
 #define PTR_L		lw
 #define PTR_S		sw
 #define PTR_LA		la
 #define PTR_LI		li
 #define PTR_SLL		sll
 #define PTR_SLLV	sllv
 #define PTR_SRL		srl
 #define PTR_SRLV	srlv
 #define PTR_SRA		sra
 #define PTR_SRAV	srav

 #define PTR_SCALESHIFT	2

 #define PTR_WD		.word
 #define PTRSIZE		4
 #define PTRLOG		2
 #endif

 #if (_MIPS_SZPTR == 64)
 #define PTR_ADD		dadd
 #define PTR_ADDU	daddu
 #define PTR_ADDI	daddi
 #define PTR_ADDIU	daddiu
 #define PTR_SUB		dsub
 #define PTR_SUBU	dsubu
 #define PTR_L		ld
 #define PTR_S		sd
 #define PTR_LA		dla
 #define PTR_LI		dli
 #define PTR_SLL		dsll
 #define PTR_SLLV	dsllv
 #define PTR_SRL		dsrl
 #define PTR_SRLV	dsrlv
 #define PTR_SRA		dsra
 #define PTR_SRAV	dsrav

 #define PTR_SCALESHIFT	3

 #define PTR_WD		.dword
 #define PTRSIZE		8
 #define PTRLOG		3
 #endif

 /*
  * Some cp0 registers were extended to 64bit for MIPS III.
  */
 #if (_MIPS_SIM == _MIPS_SIM_ABI32)
 #define MFC0		mfc0
 #define MTC0		mtc0
 #endif
 #if (_MIPS_SIM == _MIPS_SIM_NABI32) || (_MIPS_SIM == _MIPS_SIM_ABI64)
 #define MFC0		dmfc0
 #define MTC0		dmtc0
 #endif

 #define SSNOP		sll zero, zero, 1

 /*
  * Using a branch-likely instruction to check the result of an sc instruction
  * works around a bug present in R10000 CPUs prior to revision 3.0 that could
  * cause ll-sc sequences to execute non-atomically.
  */
 #ifdef CONFIG_WAR_R10000_LLSC
 # define SC_BEQZ	beqzl
 #elif !defined(CONFIG_CC_HAS_BROKEN_INLINE_COMPAT_BRANCH) && MIPS_ISA_REV >= 6
 # define SC_BEQZ	beqzc
 #else
 # define SC_BEQZ	beqz
 #endif

 #ifdef CONFIG_SGI_IP28
 /* Inhibit speculative stores to volatile (e.g.DMA) or invalid addresses. */
 #include <asm/cacheops.h>
 #define R10KCBARRIER(addr)  cache   Cache_Barrier, addr;
 #else
 #define R10KCBARRIER(addr)
 #endif

 #endif /* __ASM_ASM_H */
	/*
	* 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.
	*
	* Copyright (C) 1995, 1996, 1997, 1999, 2001 by Ralf Baechle
	* Copyright (C) 1999 by Silicon Graphics, Inc.
	* Copyright (C) 2001 MIPS Technologies, Inc.
	* Copyright (C) 2002 Maciej W. Rozycki
	*
	* Some useful macros for MIPS assembler code
	*
	* Some of the routines below contain useless nops that will be optimized
	* away by gas in -O mode. These nops are however required to fill delay
	* slots in noreorder mode.
	*/
	#ifndef __ASM_ASM_H
	#define __ASM_ASM_H

	#include <asm/sgidefs.h>
	#include <asm/asm-eva.h>
	#include <asm/isa-rev.h>

	#ifndef __VDSO__
	/*
	* Emit CFI data in .debug_frame sections, not .eh_frame sections.
	* We don't do DWARF unwinding at runtime, so only the offline DWARF
	* information is useful to anyone. Note we should change this if we
	* ever decide to enable DWARF unwinding at runtime.
	*/
	#define CFI_SECTIONS .cfi_sections .debug_frame
	#else
	/*
	* For the vDSO, emit both runtime unwind information and debug
	* symbols for the .dbg file.
	*/
	#define CFI_SECTIONS
	#endif

	#ifdef __ASSEMBLY__
	/*
	* LEAF - declare leaf routine
	*/
	#define LEAF(symbol) \
	CFI_SECTIONS; \
	.globl symbol; \
	.align 2; \
	.type symbol, @function; \
	.ent symbol, 0; \
	symbol: .frame sp, 0, ra; \
	.cfi_startproc; \
	.insn

	/*
	* NESTED - declare nested routine entry point
	*/
	#define NESTED(symbol, framesize, rpc) \
	CFI_SECTIONS; \
	.globl symbol; \
	.align 2; \
	.type symbol, @function; \
	.ent symbol, 0; \
	symbol: .frame sp, framesize, rpc; \
	.cfi_startproc; \
	.insn

	/*
	* END - mark end of function
	*/
	#define END(function) \
	.cfi_endproc; \
	.end function; \
	.size function, .-function

	/*
	* EXPORT - export definition of symbol
	*/
	#define EXPORT(symbol) \
	.globl symbol; \
	symbol:

	/*
	* FEXPORT - export definition of a function symbol
	*/
	#define FEXPORT(symbol) \
	.globl symbol; \
	.type symbol, @function; \
	symbol: .insn

	/*
	* ABS - export absolute symbol
	*/
	#define ABS(symbol,value) \
	.globl symbol; \
	symbol = value

	#define TEXT(msg) \
	.pushsection .data; \
	8: .asciiz msg; \
	.popsection;

	#define ASM_PANIC(msg) \
	.set push; \
	.set reorder; \
	PTR_LA a0, 8f; \
	jal panic; \
	9: b 9b; \
	.set pop; \
	TEXT(msg)

	/*
	* Print formatted string
	*/
	#ifdef CONFIG_PRINTK
	#define ASM_PRINT(string) \
	.set push; \
	.set reorder; \
	PTR_LA a0, 8f; \
	jal _printk; \
	.set pop; \
	TEXT(string)
	#else
	#define ASM_PRINT(string)
	#endif

	#endif /* __ASSEMBLY__ */

	/*
	* Stack alignment
	*/
	#if (_MIPS_SIM == _MIPS_SIM_ABI32)
	#define ALSZ 7
	#define ALMASK ~7
	#endif
	#if (_MIPS_SIM == _MIPS_SIM_NABI32) \|\| (_MIPS_SIM == _MIPS_SIM_ABI64)
	#define ALSZ 15
	#define ALMASK ~15
	#endif

	/*
	* Macros to handle different pointer/register sizes for 32/64-bit code
	*/

	/*
	* Size of a register
	*/
	#ifdef __mips64
	#define SZREG 8
	#else
	#define SZREG 4
	#endif

	/*
	* Use the following macros in assemblercode to load/store registers,
	* pointers etc.
	*/
	#if (_MIPS_SIM == _MIPS_SIM_ABI32)
	#define REG_S sw
	#define REG_L lw
	#define REG_SUBU subu
	#define REG_ADDU addu
	#endif
	#if (_MIPS_SIM == _MIPS_SIM_NABI32) \|\| (_MIPS_SIM == _MIPS_SIM_ABI64)
	#define REG_S sd
	#define REG_L ld
	#define REG_SUBU dsubu
	#define REG_ADDU daddu
	#endif

	/*
	* How to add/sub/load/store/shift C int variables.
	*/
	#if (_MIPS_SZINT == 32)
	#define INT_ADD add
	#define INT_ADDU addu
	#define INT_ADDI addi
	#define INT_ADDIU addiu
	#define INT_SUB sub
	#define INT_SUBU subu
	#define INT_L lw
	#define INT_S sw
	#define INT_SLL sll
	#define INT_SLLV sllv
	#define INT_SRL srl
	#define INT_SRLV srlv
	#define INT_SRA sra
	#define INT_SRAV srav
	#endif

	#if (_MIPS_SZINT == 64)
	#define INT_ADD dadd
	#define INT_ADDU daddu
	#define INT_ADDI daddi
	#define INT_ADDIU daddiu
	#define INT_SUB dsub
	#define INT_SUBU dsubu
	#define INT_L ld
	#define INT_S sd
	#define INT_SLL dsll
	#define INT_SLLV dsllv
	#define INT_SRL dsrl
	#define INT_SRLV dsrlv
	#define INT_SRA dsra
	#define INT_SRAV dsrav
	#endif

	/*
	* How to add/sub/load/store/shift C long variables.
	*/
	#if (_MIPS_SZLONG == 32)
	#define LONG_ADD add
	#define LONG_ADDU addu
	#define LONG_ADDI addi
	#define LONG_ADDIU addiu
	#define LONG_SUB sub
	#define LONG_SUBU subu
	#define LONG_L lw
	#define LONG_LL ll
	#define LONG_SC sc
	#define LONG_S sw
	#define LONG_SP swp
	#define LONG_SLL sll
	#define LONG_SLLV sllv
	#define LONG_SRL srl
	#define LONG_SRLV srlv
	#define LONG_SRA sra
	#define LONG_SRAV srav
	#define LONG_INS ins
	#define LONG_EXT ext

	#ifdef __ASSEMBLY__
	#define LONG .word
	#endif
	#define LONGSIZE 4
	#define LONGMASK 3
	#define LONGLOG 2
	#endif

	#if (_MIPS_SZLONG == 64)
	#define LONG_ADD dadd
	#define LONG_ADDU daddu
	#define LONG_ADDI daddi
	#define LONG_ADDIU daddiu
	#define LONG_SUB dsub
	#define LONG_SUBU dsubu
	#define LONG_L ld
	#define LONG_LL lld
	#define LONG_SC scd
	#define LONG_S sd
	#define LONG_SP sdp
	#define LONG_SLL dsll
	#define LONG_SLLV dsllv
	#define LONG_SRL dsrl
	#define LONG_SRLV dsrlv
	#define LONG_SRA dsra
	#define LONG_SRAV dsrav
	#define LONG_INS dins
	#define LONG_EXT dext

	#ifdef __ASSEMBLY__
	#define LONG .dword
	#endif
	#define LONGSIZE 8
	#define LONGMASK 7
	#define LONGLOG 3
	#endif

	/*
	* How to add/sub/load/store/shift pointers.
	*/
	#if (_MIPS_SZPTR == 32)
	#define PTR_ADD add
	#define PTR_ADDU addu
	#define PTR_ADDI addi
	#define PTR_ADDIU addiu
	#define PTR_SUB sub
	#define PTR_SUBU subu
	#define PTR_L lw
	#define PTR_S sw
	#define PTR_LA la
	#define PTR_LI li
	#define PTR_SLL sll
	#define PTR_SLLV sllv
	#define PTR_SRL srl
	#define PTR_SRLV srlv
	#define PTR_SRA sra
	#define PTR_SRAV srav

	#define PTR_SCALESHIFT 2

	#define PTR_WD .word
	#define PTRSIZE 4
	#define PTRLOG 2
	#endif

	#if (_MIPS_SZPTR == 64)
	#define PTR_ADD dadd
	#define PTR_ADDU daddu
	#define PTR_ADDI daddi
	#define PTR_ADDIU daddiu
	#define PTR_SUB dsub
	#define PTR_SUBU dsubu
	#define PTR_L ld
	#define PTR_S sd
	#define PTR_LA dla
	#define PTR_LI dli
	#define PTR_SLL dsll
	#define PTR_SLLV dsllv
	#define PTR_SRL dsrl
	#define PTR_SRLV dsrlv
	#define PTR_SRA dsra
	#define PTR_SRAV dsrav

	#define PTR_SCALESHIFT 3

	#define PTR_WD .dword
	#define PTRSIZE 8
	#define PTRLOG 3
	#endif

	/*
	* Some cp0 registers were extended to 64bit for MIPS III.
	*/
	#if (_MIPS_SIM == _MIPS_SIM_ABI32)
	#define MFC0 mfc0
	#define MTC0 mtc0
	#endif
	#if (_MIPS_SIM == _MIPS_SIM_NABI32) \|\| (_MIPS_SIM == _MIPS_SIM_ABI64)
	#define MFC0 dmfc0
	#define MTC0 dmtc0
	#endif

	#define SSNOP sll zero, zero, 1

	/*
	* Using a branch-likely instruction to check the result of an sc instruction
	* works around a bug present in R10000 CPUs prior to revision 3.0 that could
	* cause ll-sc sequences to execute non-atomically.
	*/
	#ifdef CONFIG_WAR_R10000_LLSC
	# define SC_BEQZ beqzl
	#elif !defined(CONFIG_CC_HAS_BROKEN_INLINE_COMPAT_BRANCH) && MIPS_ISA_REV >= 6
	# define SC_BEQZ beqzc
	#else
	# define SC_BEQZ beqz
	#endif

	#ifdef CONFIG_SGI_IP28
	/* Inhibit speculative stores to volatile (e.g.DMA) or invalid addresses. */
	#include <asm/cacheops.h>
	#define R10KCBARRIER(addr) cache Cache_Barrier, addr;
	#else
	#define R10KCBARRIER(addr)
	#endif

	#endif /* __ASM_ASM_H */