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# 38# Early setup functions that may not rely on an initialized bss section, 39# like moving the initrd. Returns with an initialized bss section. 40# 41 brasl %r14,startup_init_nobss 42# 43# Early machine initialization and detection functions. 44# 45 brasl %r14,startup_init 46 47# check control registers 48 stctg %c0,%c15,0(%r15) 49 oi 6(%r15),0x60 # enable sigp emergency & external call 50 oi 4(%r15),0x10 # switch on low address proctection 51 lctlg %c0,%c15,0(%r15) 52 53 lam 0,15,.Laregs-.LPG1(%r13) # load acrs needed by uaccess 54 brasl %r14,start_kernel # go to C code 55# 56# We returned from start_kernel ?!? PANIK 57# 58 basr %r13,0 59 lpswe .Ldw-.(%r13) # load disabled wait psw 60 61 .align 16 62.LPG1: 63.Lpcmsk:.quad 0x0000000180000000 64.L4malign:.quad 0xffffffffffc00000 65.Lscan2g:.quad 0x80000000 + 0x20000 - 8 # 2GB + 128K - 8 66.Lnop: .long 0x07000700 67.Lparmaddr: 68 .quad PARMAREA 69 .align 64 70.Ldw: .quad 0x0002000180000000,0x0000000000000000 71.Laregs:.long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 72