patch-1.3.48 linux/include/asm-mips/asm.h

• Lines: 249
• Date: Wed Dec 13 12:39:45 1995
• Orig file: v1.3.47/linux/include/asm-mips/asm.h
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v1.3.47/linux/include/asm-mips/asm.h linux/include/asm-mips/asm.h
@@ -0,0 +1,248 @@
+/*
+ * include/asm-mips/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 by Ralf Baechle
+ *
+ * Some usefull 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/regdef.h>
+#include <asm/fpregdef.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
+
+/*
+ * Macros to handle different pointer sizes for 32/64-bit code
+ */
+#if __mips == 3
+#define PTR	.quad
+#define PTRSIZE	8
+#define PTRLOG	3
+#define lp	ld
+#else
+#define PTR	.word
+#define PTRSIZE	4
+#define PTRLOG	2
+#define lp	lw
+#endif
+
+/*
+ * ELF specific declarations
+ */
+#ifdef __ELF__
+#define TYPE(symbol,_type)                              \
+			.type	symbol,@_type
+#define SIZE(symbol,_size)                              \
+			.size	symbol,_size
+#else
+#define TYPE(symbol,type)
+#define SIZE(symbol,size)
+#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:
+
+/*
+ * ABS - export absolute symbol
+ */
+#define	ABS(symbol,value)                               \
+			.globl	symbol;                 \
+symbol			=	value
+
+#define	PANIC(msg)                                      \
+			la	a0,8f;                  \
+			jal	panic;                  \
+			nop;                            \
+9:			b	9b;                     \
+			nop;                            \
+			TEXT(msg)
+
+/*
+ * Print formated string
+ */
+#define PRINT(string)                                   \
+			la	a0,8f;                  \
+			jal	printk;                 \
+			nop;                            \
+			TEXT(string)
+
+#define	TEXT(msg)                                       \
+			.data;                          \
+8:			.asciiz	msg;                    \
+			.text
+
+/*
+ * Build text tables
+ */
+#define TTABLE(string)                                  \
+		.text;                                  \
+		.word	1f;                             \
+		.data;                                  \
+1:		.asciz	string;                         \
+		.text;
+
+/*
+ * Move to kernel mode and disable interrupts
+ * Set cp0 enable bit as sign that we're running on the kernel stack
+ * Use with .set noat!
+ * Note that the mtc0 will be effective on R4000 pipeline stage 7. This
+ * means that another three instructions will be executed with interrupts
+ * disabled.
+ */
+#define CLI                                             \
+		mfc0	AT,CP0_STATUS;                  \
+		li	t0,ST0_CU0|0x1f;                \
+		or	AT,t0;                          \
+		xori	AT,0x1f;                        \
+		mtc0	AT,CP0_STATUS;			\
+
+/*
+ * Move to kernel mode and enable interrupts
+ * Set cp0 enable bit as sign that we're running on the kernel stack
+ * Use with .set noat!
+ * Note that the mtc0 will be effective on R4000 pipeline stage 7. This
+ * means that another three instructions will be executed with interrupts
+ * disabled.  Arch/mips/kernel/r4xx0.S makes use of this fact.
+ */
+#define STI                                             \
+		mfc0	AT,CP0_STATUS;                  \
+		li	t0,ST0_CU0|0x1f;                \
+		or	AT,t0;                          \
+		xori	AT,0x1e;                        \
+		mtc0	AT,CP0_STATUS;			\
+
+/*
+ * Special nop to fill load delay slots
+ */
+#ifndef __R4000__
+#define NOP     nop
+#else
+#define NOP
+#endif
+
+/*
+ * Return from exception
+ */
+#if defined (CONFIG_CPU_R3000)
+#define ERET rfe
+#elif defined (CONFIG_CPU_R4X00) || defined (CONFIG_CPU_R4600)
+#define ERET                                            \
+		.set	mips3;                          \
+		eret;                                   \
+		.set	mips0
+#else
+#error "Implement ERET macro!"
+#endif
+
+/*
+ * R8000/R10000 (MIPS ISA IV) pref instruction.
+ * Use with .set noreorder only!
+ */
+#if defined (CONFIG_CPU_R8000) || defined(CONFIG_CPU_R10000)
+#define PREF(hint,addr)                                 \
+		pref	hint,addr
+#define PREFX(hint,addr)                                \
+		prefx	hint,addr
+#else
+#define PREF
+#define PREFX
+#endif
+
+/*
+ * R8000/R10000 (MIPS ISA IV) movn/movz instructions and
+ * equivalents for old CPUs. Use with .set noreorder only!
+ */
+#if defined (CONFIG_CPU_R8000) || defined (CONFIG_CPU_R10000)
+#define MOVN(rd,rs,rt)                                  \
+		movn	rd,rs,rt
+#define MOVZ(rd,rs,rt)                                  \
+		movz	rd,rs,rt
+#elif defined (CONFIG_CPU_R4000) || defined (CONFIG_CPU_R6000)
+#define MOVN(rd,rs,rt)                                  \
+		bnezl	rt,9f                           \
+		move	rd,rs                           \
+9:
+#define MOVZ(rd,rs,rt)                                  \
+		beqzl	rt,9f                           \
+		movz	rd,rt                           \
+9:
+#else /* R2000, R3000 */
+#define MOVN(rd,rs,rt)                                  \
+		beqz	rt,9f                           \
+		nop                                     \
+		move	rd,rs                           \
+9:
+#define MOVZ(rd,rs,rt)                                  \
+		bneqz	rt,9f                           \
+		nop                                     \
+		movz	rd,rt                           \
+9:
+#endif
+
+#endif /* __ASM_ASM_H */