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Diffstat (limited to '')
| -rw-r--r-- | arch/s390/kernel/reipl.S | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/arch/s390/kernel/reipl.S b/arch/s390/kernel/reipl.S new file mode 100644 index 000000000..4a2216396 --- /dev/null +++ b/arch/s390/kernel/reipl.S @@ -0,0 +1,81 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright IBM Corp 2000, 2011 + * Author(s): Holger Smolinski <Holger.Smolinski@de.ibm.com>, + * Denis Joseph Barrow, + */ + +#include <linux/linkage.h> +#include <asm/asm-offsets.h> +#include <asm/nospec-insn.h> +#include <asm/sigp.h> + + GEN_BR_THUNK %r9 + +# +# Issue "store status" for the current CPU to its prefix page +# and call passed function afterwards +# +# r2 = Function to be called after store status +# r3 = Parameter for function +# +ENTRY(store_status) + /* Save register one and load save area base */ + stg %r1,__LC_SAVE_AREA_RESTART + /* General purpose registers */ + lghi %r1,__LC_GPREGS_SAVE_AREA + stmg %r0,%r15,0(%r1) + mvc 8(8,%r1),__LC_SAVE_AREA_RESTART + /* Control registers */ + lghi %r1,__LC_CREGS_SAVE_AREA + stctg %c0,%c15,0(%r1) + /* Access registers */ + lghi %r1,__LC_AREGS_SAVE_AREA + stam %a0,%a15,0(%r1) + /* Floating point registers */ + lghi %r1,__LC_FPREGS_SAVE_AREA + std %f0, 0x00(%r1) + std %f1, 0x08(%r1) + std %f2, 0x10(%r1) + std %f3, 0x18(%r1) + std %f4, 0x20(%r1) + std %f5, 0x28(%r1) + std %f6, 0x30(%r1) + std %f7, 0x38(%r1) + std %f8, 0x40(%r1) + std %f9, 0x48(%r1) + std %f10,0x50(%r1) + std %f11,0x58(%r1) + std %f12,0x60(%r1) + std %f13,0x68(%r1) + std %f14,0x70(%r1) + std %f15,0x78(%r1) + /* Floating point control register */ + lghi %r1,__LC_FP_CREG_SAVE_AREA + stfpc 0(%r1) + /* CPU timer */ + lghi %r1,__LC_CPU_TIMER_SAVE_AREA + stpt 0(%r1) + /* Store prefix register */ + lghi %r1,__LC_PREFIX_SAVE_AREA + stpx 0(%r1) + /* Clock comparator - seven bytes */ + lghi %r1,__LC_CLOCK_COMP_SAVE_AREA + larl %r4,.Lclkcmp + stckc 0(%r4) + mvc 1(7,%r1),1(%r4) + /* Program status word */ + lghi %r1,__LC_PSW_SAVE_AREA + epsw %r4,%r5 + st %r4,0(%r1) + st %r5,4(%r1) + stg %r2,8(%r1) + lgr %r9,%r2 + lgr %r2,%r3 + BR_EX %r9 +ENDPROC(store_status) + + .section .bss + .align 8 +.Lclkcmp: .quad 0x0000000000000000 + .previous |