| /* |
| * 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> |
| |
| #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 |
| */ |
| #ifdef CONFIG_PRINTK |
| #define PRINT(string) \ |
| .set push; \ |
| .set reorder; \ |
| PTR_LA a0, 8f; \ |
| jal printk; \ |
| .set pop; \ |
| TEXT(string) |
| #else |
| #define PRINT(string) |
| #endif |
| |
| #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_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 .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 .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 |
| |
| #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 */ |
