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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 */

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