/*
* 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, 8 f; \
jal panic; \
9 : b 9 b; \
.set pop; \
TEXT(msg)
/*
* Print formatted string
*/
#ifdef CONFIG_PRINTK
#define ASM_PRINT(string) \
.set push; \
.set reorder; \
PTR_LA a0, 8 f; \
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 64 bit 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 */
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(vorverarbeitet am 2026-09-27)
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