diff options
Diffstat (limited to 'arch/s390/kernel/head64.S')
| -rw-r--r-- | arch/s390/kernel/head64.S | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/arch/s390/kernel/head64.S b/arch/s390/kernel/head64.S new file mode 100644 index 000000000..8b88dbbda --- /dev/null +++ b/arch/s390/kernel/head64.S @@ -0,0 +1,48 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright IBM Corp. 1999, 2010 + * + * Author(s): Hartmut Penner <hp@de.ibm.com> + * Martin Schwidefsky <schwidefsky@de.ibm.com> + * Rob van der Heij <rvdhei@iae.nl> + * Heiko Carstens <heiko.carstens@de.ibm.com> + * + */ + +#include <linux/init.h> +#include <linux/linkage.h> +#include <asm/asm-offsets.h> +#include <asm/thread_info.h> +#include <asm/page.h> +#include <asm/ptrace.h> + +__HEAD +ENTRY(startup_continue) + tm __LC_STFLE_FAC_LIST+5,0x80 # LPP available ? + jz 0f + xc __LC_LPP+1(7,0),__LC_LPP+1 # clear lpp and current_pid + mvi __LC_LPP,0x80 # and set LPP_MAGIC + .insn s,0xb2800000,__LC_LPP # load program parameter +0: larl %r1,tod_clock_base + mvc 0(16,%r1),__LC_BOOT_CLOCK + larl %r13,.LPG1 # get base +# +# Setup stack +# + larl %r14,init_task + stg %r14,__LC_CURRENT + larl %r15,init_thread_union+THREAD_SIZE-STACK_FRAME_OVERHEAD-__PT_SIZE +#ifdef CONFIG_KASAN + brasl %r14,kasan_early_init +#endif + brasl %r14,startup_init # s390 specific early init + brasl %r14,start_kernel # common init code +# +# We returned from start_kernel ?!? PANIK +# + basr %r13,0 + lpswe .Ldw-.(%r13) # load disabled wait psw + + .align 16 +.LPG1: +.Ldw: .quad 0x0002000180000000,0x0000000000000000 |