diff options
Diffstat (limited to 'include/asm-mips/asm.h')
| -rw-r--r-- | include/asm-mips/asm.h | 396 |
1 files changed, 396 insertions, 0 deletions
diff --git a/include/asm-mips/asm.h b/include/asm-mips/asm.h new file mode 100644 index 000000000000..f53237772985 --- /dev/null +++ b/include/asm-mips/asm.h @@ -0,0 +1,396 @@ +/* + * 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 <linux/config.h> +#include <asm/sgidefs.h> + +#ifndef CAT +#ifdef __STDC__ +#define __CAT(str1,str2) str1##str2 +#else +#define __CAT(str1,str2) str1/**/str2 +#endif +#define CAT(str1,str2) __CAT(str1,str2) +#endif + +/* + * PIC specific declarations + * Not used for the kernel but here seems to be the right place. + */ +#ifdef __PIC__ +#define CPRESTORE(register) \ + .cprestore register +#define CPADD(register) \ + .cpadd register +#define CPLOAD(register) \ + .cpload register +#else +#define CPRESTORE(register) +#define CPADD(register) +#define CPLOAD(register) +#endif + +/* + * LEAF - declare leaf routine + */ +#define LEAF(symbol) \ + .globl symbol; \ + .align 2; \ + .type symbol,@function; \ + .ent symbol,0; \ +symbol: .frame sp,0,ra + +/* + * NESTED - declare nested routine entry point + */ +#define NESTED(symbol, framesize, rpc) \ + .globl symbol; \ + .align 2; \ + .type symbol,@function; \ + .ent symbol,0; \ +symbol: .frame sp, framesize, rpc + +/* + * END - mark end of function + */ +#define END(function) \ + .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: + +/* + * ABS - export absolute symbol + */ +#define ABS(symbol,value) \ + .globl symbol; \ +symbol = value + +#define PANIC(msg) \ + .set push; \ + .set reorder; \ + PTR_LA a0,8f; \ + jal panic; \ +9: b 9b; \ + .set pop; \ + TEXT(msg) + +/* + * Print formatted string + */ +#define PRINT(string) \ + .set push; \ + .set reorder; \ + PTR_LA a0,8f; \ + jal printk; \ + .set pop; \ + TEXT(string) + +#define TEXT(msg) \ + .pushsection .data; \ +8: .asciiz msg; \ + .popsection; + +/* + * Build text tables + */ +#define TTABLE(string) \ + .pushsection .text; \ + .word 1f; \ + .popsection \ + .pushsection .data; \ +1: .asciiz string; \ + .popsection + +/* + * MIPS IV pref instruction. + * Use with .set noreorder only! + * + * MIPS IV implementations are free to treat this as a nop. The R5000 + * is one of them. So we should have an option not to use this instruction. + */ +#ifdef CONFIG_CPU_HAS_PREFETCH + +#define PREF(hint,addr) \ + .set push; \ + .set mips4; \ + pref hint,addr; \ + .set pop + +#define PREFX(hint,addr) \ + .set push; \ + .set mips4; \ + prefx hint,addr; \ + .set pop + +#else /* !CONFIG_CPU_HAS_PREFETCH */ + +#define PREF(hint,addr) +#define PREFX(hint,addr) + +#endif /* !CONFIG_CPU_HAS_PREFETCH */ + +/* + * MIPS ISA IV/V movn/movz instructions and equivalents for older CPUs. + */ +#if (_MIPS_ISA == _MIPS_ISA_MIPS1) +#define MOVN(rd,rs,rt) \ + .set push; \ + .set reorder; \ + beqz rt,9f; \ + move rd,rs; \ + .set pop; \ +9: +#define MOVZ(rd,rs,rt) \ + .set push; \ + .set reorder; \ + bnez rt,9f; \ + move rd,rs; \ + .set pop; \ +9: +#endif /* _MIPS_ISA == _MIPS_ISA_MIPS1 */ +#if (_MIPS_ISA == _MIPS_ISA_MIPS2) || (_MIPS_ISA == _MIPS_ISA_MIPS3) +#define MOVN(rd,rs,rt) \ + .set push; \ + .set noreorder; \ + bnezl rt,9f; \ + move rd,rs; \ + .set pop; \ +9: +#define MOVZ(rd,rs,rt) \ + .set push; \ + .set noreorder; \ + beqzl rt,9f; \ + move rd,rs; \ + .set pop; \ +9: +#endif /* (_MIPS_ISA == _MIPS_ISA_MIPS2) || (_MIPS_ISA == _MIPS_ISA_MIPS3) */ +#if (_MIPS_ISA == _MIPS_ISA_MIPS4 ) || (_MIPS_ISA == _MIPS_ISA_MIPS5) || \ + (_MIPS_ISA == _MIPS_ISA_MIPS32) || (_MIPS_ISA == _MIPS_ISA_MIPS64) +#define MOVN(rd,rs,rt) \ + movn rd,rs,rt +#define MOVZ(rd,rs,rt) \ + movz rd,rs,rt +#endif /* MIPS IV, MIPS V, MIPS32 or MIPS64 */ + +/* + * 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_S sw +#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 .word +#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_S sd +#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 .dword +#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_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 .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_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 .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 + +#endif /* __ASM_ASM_H */ |