1. 根目录:
2. arch
3. mips
4. include
5. asm
6. mach-ip27
7. kernel-entry-init.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) 2000 Silicon Graphics, Inc.
 * Copyright (C) 2005 Ralf Baechle <ralf@linux-mips.org>
 */
#ifndef __ASM_MACH_IP27_KERNEL_ENTRY_H
#define __ASM_MACH_IP27_KERNEL_ENTRY_H

#include <asm/sn/addrs.h>
#include <asm/sn/sn0/hubni.h>
#include <asm/sn/klkernvars.h>

/*
 * Returns the local nasid into res.
 */
	.macro GET_NASID_ASM res
	dli	\res, LOCAL_HUB_ADDR(NI_STATUS_REV_ID)
	ld	\res, (\res)
	and	\res, NSRI_NODEID_MASK
	dsrl	\res, NSRI_NODEID_SHFT
	.endm

/*
 * Intentionally empty macro, used in head.S. Override in
 * arch/mips/mach-xxx/kernel-entry-init.h when necessary.
 */
	.macro	kernel_entry_setup
	GET_NASID_ASM	t1
	move		t2, t1			# text and data are here
	MAPPED_KERNEL_SETUP_TLB
	.endm

/*
 * Do SMP slave processor setup necessary before we can savely execute C code.
 */
	.macro	smp_slave_setup
	GET_NASID_ASM	t1
	dli	t0, KLDIR_OFFSET + (KLI_KERN_VARS * KLDIR_ENT_SIZE) + \
		    KLDIR_OFF_POINTER + CAC_BASE
	dsll	t1, NASID_SHFT
	or	t0, t0, t1
	ld	t0, 0(t0)			# t0 points to kern_vars struct
	lh	t1, KV_RO_NASID_OFFSET(t0)
	lh	t2, KV_RW_NASID_OFFSET(t0)
	MAPPED_KERNEL_SETUP_TLB

	/*
	 * We might not get launched at the address the kernel is linked to,
	 * so we jump there.
	 */
	PTR_LA	t0, 0f
	jr	t0
0:
	.endm

#endif /* __ASM_MACH_IP27_KERNEL_ENTRY_H */