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 20ENTRY(startup_continue) 21 tm __LC_STFLE_FAC_LIST+5,0x80 # LPP available ? 22 jz 0f 23 xc __LC_LPP+1(7,0),__LC_LPP+1 # clear lpp and current_pid 24 mvi __LC_LPP,0x80 # and set LPP_MAGIC 25 .insn s,0xb2800000,__LC_LPP # load program parameter 260: larl %r1,tod_clock_base 27 mvc 0(16,%r1),__LC_BOOT_CLOCK 28 larl %r13,.LPG1 # get base 29 larl %r0,boot_vdso_data 30 stg %r0,__LC_VDSO_PER_CPU 31# 32# Setup stack 33# 34 larl %r14,init_task 35 stg %r14,__LC_CURRENT 36 larl %r15,init_thread_union+THREAD_SIZE-STACK_FRAME_OVERHEAD 37#ifdef CONFIG_KASAN 38 brasl %r14,kasan_early_init 39#endif 40# 41# Early machine initialization and detection functions. 42# 43 brasl %r14,startup_init 44 45# check control registers 46 stctg %c0,%c15,0(%r15) 47 oi 6(%r15),0x60 # enable sigp emergency & external call 48 oi 4(%r15),0x10 # switch on low address proctection 49 lctlg %c0,%c15,0(%r15) 50 51 lam 0,15,.Laregs-.LPG1(%r13) # load acrs needed by uaccess 52 brasl %r14,start_kernel # go to C code 53# 54# We returned from start_kernel ?!? PANIK 55# 56 basr %r13,0 57 lpswe .Ldw-.(%r13) # load disabled wait psw 58 59 .align 16 60.LPG1: 61.Ldw: .quad 0x0002000180000000,0x0000000000000000 62.Laregs:.long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 63