1. 根目录:
2. arch
3. mips
4. include
5. asm
6. sgi
7. sgi.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.
 *
 * sgi.h: Definitions specific to SGI machines.
 *
 * Copyright (C) 1996 David S. Miller (dm@sgi.com)
 */
#ifndef _ASM_SGI_SGI_H
#define _ASM_SGI_SGI_H

/* UP=UniProcessor MP=MultiProcessor(capable) */
enum sgi_mach {
	ip4,	/* R2k UP */
	ip5,	/* R2k MP */
	ip6,	/* R3k UP */
	ip7,	/* R3k MP */
	ip9,	/* R3k UP */
	ip12,	/* R3kA UP, Indigo */
	ip15,	/* R3kA MP */
	ip17,	/* R4K UP */
	ip19,	/* R4K MP */
	ip20,	/* R4K UP, Indigo */
	ip21,	/* R8k/TFP MP */
	ip22,	/* R4x00 UP, Indy, Indigo2 */
	ip25,	/* R10k MP */
	ip26,	/* R8k/TFP UP, Indigo2 */
	ip27,	/* R10k MP, R12k MP, R14k MP, Origin 200/2k, Onyx2 */
	ip28,	/* R10k UP, Indigo2 Impact R10k */
	ip30,	/* R10k MP, R12k MP, R14k MP, Octane */
	ip32,	/* R5k UP, RM5200 UP, RM7k UP, R10k UP, R12k UP, O2 */
	ip35,   /* R14k MP, R16k MP, Origin 300/3k, Onyx3, Fuel, Tezro */
};

extern enum sgi_mach sgimach;
extern void sgi_sysinit(void);

/* Many I/O space registers are byte sized and are contained within
 * one byte per word, specifically the MSB, this macro helps out.
 */
#ifdef __MIPSEL__
#define SGI_MSB(regaddr)   (regaddr)
#else
#define SGI_MSB(regaddr)   ((regaddr) | 0x3)
#endif

#endif /* _ASM_SGI_SGI_H */