1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright IBM Corp. 1999, 2010
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>
12 #include <linux/init.h>
13 #include <linux/linkage.h>
14 #include <asm/asm-offsets.h>
15 #include <asm/thread_info.h>
17 #include <asm/ptrace.h>
20 ENTRY(startup_continue)
21 tm __LC_STFLE_FAC_LIST+5,0x80 # LPP available ?
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
26 0: larl %r1,tod_clock_base
27 mvc 0(16,%r1),__LC_BOOT_CLOCK
28 larl %r13,.LPG1 # get base
29 lctlg %c0,%c15,.Lctl-.LPG1(%r13) # load control registers
30 larl %r0,boot_vdso_data
31 stg %r0,__LC_VDSO_PER_CPU
37 larl %r15,init_thread_union+THREAD_SIZE-STACK_FRAME_OVERHEAD
39 # Early setup functions that may not rely on an initialized bss section,
40 # like moving the initrd. Returns with an initialized bss section.
42 brasl %r14,startup_init_nobss
44 # Early machine initialization and detection functions.
46 brasl %r14,startup_init
48 # check control registers
49 stctg %c0,%c15,0(%r15)
50 oi 6(%r15),0x60 # enable sigp emergency & external call
51 oi 4(%r15),0x10 # switch on low address proctection
52 lctlg %c0,%c15,0(%r15)
54 lam 0,15,.Laregs-.LPG1(%r13) # load acrs needed by uaccess
55 brasl %r14,start_kernel # go to C code
57 # We returned from start_kernel ?!? PANIK
60 lpswe .Ldw-.(%r13) # load disabled wait psw
64 .Lctl: .quad 0x04040000 # cr0: AFP registers & secondary space
65 .quad 0 # cr1: primary space segment table
66 .quad .Lduct # cr2: dispatchable unit control table
67 .quad 0 # cr3: instruction authorization
68 .quad 0xffff # cr4: instruction authorization
69 .quad .Lduct # cr5: primary-aste origin
70 .quad 0 # cr6: I/O interrupts
71 .quad 0 # cr7: secondary space segment table
72 .quad 0 # cr8: access registers translation
73 .quad 0 # cr9: tracing off
74 .quad 0 # cr10: tracing off
75 .quad 0 # cr11: tracing off
76 .quad 0 # cr12: tracing off
77 .quad 0 # cr13: home space segment table
78 .quad 0xc0000000 # cr14: machine check handling off
79 .quad .Llinkage_stack # cr15: linkage stack operations
80 .Lpcmsk:.quad 0x0000000180000000
81 .L4malign:.quad 0xffffffffffc00000
82 .Lscan2g:.quad 0x80000000 + 0x20000 - 8 # 2GB + 128K - 8
83 .Lnop: .long 0x07000700
87 .Lduct: .long 0,.Laste,.Laste,0,.Lduald,0,0,0
89 .Laste: .quad 0,0xffffffffffffffff,0,0,0,0,0,0
92 .long 0x80000000,0,0,0 # invalid access-list entries
95 .long 0,0,0x89000000,0,0,0,0x8a000000,0
96 .Ldw: .quad 0x0002000180000000,0x0000000000000000
97 .Laregs:.long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0