diff options
Diffstat (limited to 'arch/s390/kernel/base.S')
| -rw-r--r-- | arch/s390/kernel/base.S | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/arch/s390/kernel/base.S b/arch/s390/kernel/base.S new file mode 100644 index 000000000..b79e0fd57 --- /dev/null +++ b/arch/s390/kernel/base.S @@ -0,0 +1,63 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * arch/s390/kernel/base.S + * + * Copyright IBM Corp. 2006, 2007 + * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com> + * Michael Holzheu <holzheu@de.ibm.com> + */ + +#include <linux/linkage.h> +#include <asm/asm-offsets.h> +#include <asm/nospec-insn.h> +#include <asm/ptrace.h> +#include <asm/sigp.h> + + GEN_BR_THUNK %r9 + GEN_BR_THUNK %r14 + +ENTRY(s390_base_ext_handler) + stmg %r0,%r15,__LC_SAVE_AREA_ASYNC + basr %r13,0 +0: aghi %r15,-STACK_FRAME_OVERHEAD + larl %r1,s390_base_ext_handler_fn + lg %r9,0(%r1) + ltgr %r9,%r9 + jz 1f + BASR_EX %r14,%r9 +1: lmg %r0,%r15,__LC_SAVE_AREA_ASYNC + ni __LC_EXT_OLD_PSW+1,0xfd # clear wait state bit + lpswe __LC_EXT_OLD_PSW +ENDPROC(s390_base_ext_handler) + + .section .bss + .align 8 + .globl s390_base_ext_handler_fn +s390_base_ext_handler_fn: + .quad 0 + .previous + +ENTRY(s390_base_pgm_handler) + stmg %r0,%r15,__LC_SAVE_AREA_SYNC + basr %r13,0 +0: aghi %r15,-STACK_FRAME_OVERHEAD + larl %r1,s390_base_pgm_handler_fn + lg %r9,0(%r1) + ltgr %r9,%r9 + jz 1f + BASR_EX %r14,%r9 + lmg %r0,%r15,__LC_SAVE_AREA_SYNC + lpswe __LC_PGM_OLD_PSW +1: lpswe disabled_wait_psw-0b(%r13) +ENDPROC(s390_base_pgm_handler) + + .align 8 +disabled_wait_psw: + .quad 0x0002000180000000,0x0000000000000000 + s390_base_pgm_handler + + .section .bss + .align 8 + .globl s390_base_pgm_handler_fn +s390_base_pgm_handler_fn: + .quad 0 + .previous |