asm.h

COG-VP12864液晶屏驱动代码及对应RTC实例

/*
 * 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, 1996, 1997 by Ralf Baechle
 *
 * 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_H_
#define	_ASM_H_
#define ASM_ONLY 

/*
 * Macros to handle different pointer/register sizes for 32/64-bit code
 *
 * 64 bit address space isn't used yet, so we may use the R3000 32 bit
 * defines for now.
 */
#define PTRSIZE	4
#define PTRLOG	2

/* Philip modify, Mar 16,2004 */
/* #define ROM_512KB */
/*
#define ROM_64KB

#ifdef ROM_512K
#define DATA_START_ADDR     0x1fc7c000
#endif

#ifdef ROM_64KB
#define DATA_START_ADDR     0x1fc0c000
#endif
*/

#ifndef _TEXT_SECTION
#define _TEXT_SECTION .text
#endif


/*
 * LEAF - declare leaf routine
 */
#define LEAF(name) \
        _TEXT_SECTION; \
        .globl  name; \
        .ent    name; \
    name:

/*
 * 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 
2004.08.25, philip modify "//".
*/

/*
 * 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)                                      \
		.set	push;				\
		.set	reorder;                        \
		la	a0,8f;                          \
		jal	panic;                          \
9:		b	9b;                             \
		.set	pop;				\
		TEXT(msg)

/*
 * Print formated string
 */
#define PRINT(string)                                   \
		.set	push;				\
		.set	reorder;                        \
		la	a0,8f;                          \
		jal	printk;                         \
		.set	pop;				\
		TEXT(string)

#define	TEXT(msg)                                       \
		.data;                                  \
8:		.asciiz	msg;                            \
		.previous;

/*
 * Build text tables
 */
#define TTABLE(string)                                  \
		.text;                                  \
		.word	1f;                             \
		.previous;                              \
		.data;                                  \
1:		.asciz	string;                         \
		.previous


#endif /* __ASM_ASM_H */