1. 根目录:
2. arch
3. mips
4. include
5. asm
6. fw
7. fw.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) 2012 MIPS Technologies, Inc.
 */
#ifndef __ASM_FW_H_
#define __ASM_FW_H_

#include <asm/bootinfo.h>	/* For cleaner code... */

enum fw_memtypes {
	fw_dontuse,
	fw_code,
	fw_free,
};

typedef struct {
	unsigned long base;	/* Within KSEG0 */
	unsigned int size;	/* bytes */
	enum fw_memtypes type;	/* fw_memtypes */
} fw_memblock_t;

/* Maximum number of memory block descriptors. */
#define FW_MAX_MEMBLOCKS	32

extern int fw_argc;
extern int *_fw_argv;
extern int *_fw_envp;

/*
 * Most firmware like YAMON, PMON, etc. pass arguments and environment
 * variables as 32-bit pointers. These take care of sign extension.
 */
#define fw_argv(index)		((char *)(long)_fw_argv[(index)])
#define fw_envp(index)		((char *)(long)_fw_envp[(index)])

extern void fw_init_cmdline(void);
extern char *fw_getcmdline(void);
extern fw_memblock_t *fw_getmdesc(void);
extern void fw_meminit(void);
extern char *fw_getenv(char *name);
extern unsigned long fw_getenvl(char *name);
extern void fw_init_early_console(char port);

#endif /* __ASM_FW_H_ */