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         lctlg   %c0,%c15,.Lctl-.LPG1(%r13)      # load control registers
  25 #
  26 # Setup stack
  27 #
  28         larl    %r14,init_task
  29         stg     %r14,__LC_CURRENT
  30         larl    %r15,init_thread_union+THREAD_SIZE-STACK_FRAME_OVERHEAD-__PT_SIZE
  31 #ifdef CONFIG_KASAN
  32         brasl   %r14,kasan_early_init
  33 #endif
  34         brasl   %r14,startup_init               # s390 specific early init
  35         brasl   %r14,start_kernel               # common init code
  36 #
  37 # We returned from start_kernel ?!? PANIK
  38 #
  39         basr    %r13,0
  40         lpswe   .Ldw-.(%r13)            # load disabled wait psw
  41
  42         .align  16
  43 .LPG1:
  44 .Ldw:   .quad   0x0002000180000000,0x0000000000000000
  45 .Lctl:  .quad   0x04040000              # cr0: AFP registers & secondary space
  46         .quad   0                       # cr1: primary space segment table
  47         .quad   0                       # cr2: dispatchable unit control table
  48         .quad   0                       # cr3: instruction authorization
  49         .quad   0xffff                  # cr4: instruction authorization
  50         .quad   0                       # cr5: primary-aste origin
  51         .quad   0                       # cr6: I/O interrupts
  52         .quad   0                       # cr7: secondary space segment table
  53         .quad   0x0000000000008000      # cr8: access registers translation
  54         .quad   0                       # cr9: tracing off
  55         .quad   0                       # cr10: tracing off
  56         .quad   0                       # cr11: tracing off
  57         .quad   0                       # cr12: tracing off
  58         .quad   0                       # cr13: home space segment table
  59         .quad   0xc0000000              # cr14: machine check handling off
  60         .quad   0                       # cr15: linkage stack operations