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Diffstat (limited to 'arch/mips/include/asm/asm.h')
| -rw-r--r-- | arch/mips/include/asm/asm.h | 353 |
1 files changed, 353 insertions, 0 deletions
diff --git a/arch/mips/include/asm/asm.h b/arch/mips/include/asm/asm.h new file mode 100644 index 000000000..336ac9b65 --- /dev/null +++ b/arch/mips/include/asm/asm.h @@ -0,0 +1,353 @@ +/* + * 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 + +/* + * 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 + +/* + * 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 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 */ |