kernel-entry-init.h

Go to the documentation of this file.

/*
 * 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 <[email protected]>
 */
#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 */