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>
19 ENTRY(startup_continue)
20 tm __LC_STFLE_FAC_LIST+5,0x80 # LPP available ?
22 xc __LC_LPP+1(7,0),__LC_LPP+1 # clear lpp and current_pid
23 mvi __LC_LPP,0x80 # and set LPP_MAGIC
24 .insn s,0xb2800000,__LC_LPP # load program parameter
25 0: larl %r1,tod_clock_base
26 mvc 0(16,%r1),__LC_BOOT_CLOCK
27 larl %r13,.LPG1 # get base
28 lctlg %c0,%c15,.Lctl-.LPG1(%r13) # load control registers
29 lg %r12,.Lparmaddr-.LPG1(%r13) # pointer to parameter area
30 # move IPL device to lowcore
31 larl %r0,boot_vdso_data
32 stg %r0,__LC_VDSO_PER_CPU
38 larl %r15,init_thread_union
39 aghi %r15,1<<(PAGE_SHIFT+THREAD_SIZE_ORDER) # init_task_union + THREAD_SIZE
40 stg %r15,__LC_KERNEL_STACK # set end of kernel stack
43 # Early setup functions that may not rely on an initialized bss section,
44 # like moving the initrd. Returns with an initialized bss section.
46 brasl %r14,startup_init_nobss
48 # Early machine initialization and detection functions.
50 brasl %r14,startup_init
52 # check control registers
53 stctg %c0,%c15,0(%r15)
54 oi 6(%r15),0x60 # enable sigp emergency & external call
55 oi 4(%r15),0x10 # switch on low address proctection
56 lctlg %c0,%c15,0(%r15)
58 lam 0,15,.Laregs-.LPG1(%r13) # load acrs needed by uaccess
59 brasl %r14,start_kernel # go to C code
61 # We returned from start_kernel ?!? PANIK
64 lpswe .Ldw-.(%r13) # load disabled wait psw
68 .Lctl: .quad 0x04040000 # cr0: AFP registers & secondary space
69 .quad 0 # cr1: primary space segment table
70 .quad .Lduct # cr2: dispatchable unit control table
71 .quad 0 # cr3: instruction authorization
72 .quad 0xffff # cr4: instruction authorization
73 .quad .Lduct # cr5: primary-aste origin
74 .quad 0 # cr6: I/O interrupts
75 .quad 0 # cr7: secondary space segment table
76 .quad 0 # cr8: access registers translation
77 .quad 0 # cr9: tracing off
78 .quad 0 # cr10: tracing off
79 .quad 0 # cr11: tracing off
80 .quad 0 # cr12: tracing off
81 .quad 0 # cr13: home space segment table
82 .quad 0xc0000000 # cr14: machine check handling off
83 .quad .Llinkage_stack # cr15: linkage stack operations
84 .Lpcmsk:.quad 0x0000000180000000
85 .L4malign:.quad 0xffffffffffc00000
86 .Lscan2g:.quad 0x80000000 + 0x20000 - 8 # 2GB + 128K - 8
87 .Lnop: .long 0x07000700
91 .Lduct: .long 0,.Laste,.Laste,0,.Lduald,0,0,0
93 .Laste: .quad 0,0xffffffffffffffff,0,0,0,0,0,0
96 .long 0x80000000,0,0,0 # invalid access-list entries
99 .long 0,0,0x89000000,0,0,0,0x8a000000,0
100 .Ldw: .quad 0x0002000180000000,0x0000000000000000
101 .Laregs:.long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0