LXR linux/arch/s390/kernel/reipl.S

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 *    Copyright IBM Corp 2000, 2011
   4 *    Author(s): Holger Smolinski <Holger.Smolinski@de.ibm.com>,
   5 *               Denis Joseph Barrow,
   6 */
   7
   8#include <linux/linkage.h>
   9#include <asm/asm-offsets.h>
  10#include <asm/nospec-insn.h>
  11#include <asm/sigp.h>
  12
  13        GEN_BR_THUNK %r9
  14
  15#
  16# Issue "store status" for the current CPU to its prefix page
  17# and call passed function afterwards
  18#
  19# r2 = Function to be called after store status
  20# r3 = Parameter for function
  21#
  22ENTRY(store_status)
  23        /* Save register one and load save area base */
  24        stg     %r1,__LC_SAVE_AREA_RESTART
  25        /* General purpose registers */
  26        lghi    %r1,__LC_GPREGS_SAVE_AREA
  27        stmg    %r0,%r15,0(%r1)
  28        mvc     8(8,%r1),__LC_SAVE_AREA_RESTART
  29        /* Control registers */
  30        lghi    %r1,__LC_CREGS_SAVE_AREA
  31        stctg   %c0,%c15,0(%r1)
  32        /* Access registers */
  33        lghi    %r1,__LC_AREGS_SAVE_AREA
  34        stam    %a0,%a15,0(%r1)
  35        /* Floating point registers */
  36        lghi    %r1,__LC_FPREGS_SAVE_AREA
  37        std     %f0, 0x00(%r1)
  38        std     %f1, 0x08(%r1)
  39        std     %f2, 0x10(%r1)
  40        std     %f3, 0x18(%r1)
  41        std     %f4, 0x20(%r1)
  42        std     %f5, 0x28(%r1)
  43        std     %f6, 0x30(%r1)
  44        std     %f7, 0x38(%r1)
  45        std     %f8, 0x40(%r1)
  46        std     %f9, 0x48(%r1)
  47        std     %f10,0x50(%r1)
  48        std     %f11,0x58(%r1)
  49        std     %f12,0x60(%r1)
  50        std     %f13,0x68(%r1)
  51        std     %f14,0x70(%r1)
  52        std     %f15,0x78(%r1)
  53        /* Floating point control register */
  54        lghi    %r1,__LC_FP_CREG_SAVE_AREA
  55        stfpc   0(%r1)
  56        /* CPU timer */
  57        lghi    %r1,__LC_CPU_TIMER_SAVE_AREA
  58        stpt    0(%r1)
  59        /* Store prefix register */
  60        lghi    %r1,__LC_PREFIX_SAVE_AREA
  61        stpx    0(%r1)
  62        /* Clock comparator - seven bytes */
  63        lghi    %r1,__LC_CLOCK_COMP_SAVE_AREA
  64        larl    %r4,.Lclkcmp
  65        stckc   0(%r4)
  66        mvc     1(7,%r1),1(%r4)
  67        /* Program status word */
  68        lghi    %r1,__LC_PSW_SAVE_AREA
  69        epsw    %r4,%r5
  70        st      %r4,0(%r1)
  71        st      %r5,4(%r1)
  72        stg     %r2,8(%r1)
  73        lgr     %r9,%r2
  74        lgr     %r2,%r3
  75        BR_EX   %r9
  76ENDPROC(store_status)
  77
  78        .section .bss
  79        .align  8
  80.Lclkcmp:       .quad   0x0000000000000000
  81        .previous
  82