arch/s390/kernel/head64.S

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright IBM Corp. 1999, 2010
   4  *
   5  *   Author(s): Hartmut Penner <hp@de.ibm.com>
   6  *              Martin Schwidefsky <schwidefsky@de.ibm.com>
   7  *              Rob van der Heij <rvdhei@iae.nl>
   8  *              Heiko Carstens <heiko.carstens@de.ibm.com>
   9  *
  10  */
  11
  12 #include <linux/init.h>
  13 #include <linux/linkage.h>
  14 #include <asm/asm-offsets.h>
  15 #include <asm/thread_info.h>
  16 #include <asm/page.h>
  17 #include <asm/ptrace.h>
  18
  19 __HEAD
  20 ENTRY(startup_continue)
  21         larl    %r1,tod_clock_base
  22         mvc     0(16,%r1),__LC_BOOT_CLOCK
  23         larl    %r13,.LPG1              # get base
  24 #
  25 # Setup stack
  26 #
  27         larl    %r14,init_task
  28         stg     %r14,__LC_CURRENT
  29         larl    %r15,init_thread_union+THREAD_SIZE-STACK_FRAME_OVERHEAD-__PT_SIZE
  30 #ifdef CONFIG_KASAN
  31         brasl   %r14,kasan_early_init
  32 #endif
  33         brasl   %r14,startup_init               # s390 specific early init
  34         brasl   %r14,start_kernel               # common init code
  35 #
  36 # We returned from start_kernel ?!? PANIK
  37 #
  38         basr    %r13,0
  39         lpswe   .Ldw-.(%r13)            # load disabled wait psw
  40
  41         .align  16
  42 .LPG1:
  43 .Ldw:   .quad   0x0002000180000000,0x0000000000000000