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 <[email protected]>
   6  *              Martin Schwidefsky <[email protected]>
   7  *              Rob van der Heij <[email protected]>
   8  *
   9  */
  10
  11 #include <linux/init.h>
  12 #include <linux/linkage.h>
  13 #include <asm/lowcore.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 SYM_CODE_START(startup_continue)
  21         larl    %r1,tod_clock_base
  22         GET_LC  %r2
  23         mvc     0(16,%r1),__LC_BOOT_CLOCK(%r2)
  24 #
  25 # Setup stack
  26 #
  27         larl    %r14,init_task
  28         stg     %r14,__LC_CURRENT(%r2)
  29         larl    %r15,init_thread_union+STACK_INIT_OFFSET
  30         stg     %r15,__LC_KERNEL_STACK(%r2)
  31         brasl   %r14,sclp_early_adjust_va       # allow sclp_early_printk
  32         brasl   %r14,startup_init               # s390 specific early init
  33         brasl   %r14,start_kernel               # common init code
  34 #
  35 # We returned from start_kernel ?!? PANIK
  36 #
  37         basr    %r13,0
  38         lpswe   dw_psw-.(%r13)          # load disabled wait psw
  39 SYM_CODE_END(startup_continue)
  40
  41         .balign 16
  42 SYM_DATA_LOCAL(dw_psw,  .quad 0x0002000180000000,0x0000000000000000)