Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Heiko Carstens | 0ad775d | 2005-11-07 00:59:12 -0800 | [diff] [blame] | 2 | * arch/s390/kernel/head64.S |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
Martin Schwidefsky | 1844c9b | 2010-02-26 22:37:53 +0100 | [diff] [blame] | 4 | * Copyright (C) IBM Corp. 1999,2010 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * |
Heiko Carstens | 0ad775d | 2005-11-07 00:59:12 -0800 | [diff] [blame] | 6 | * Author(s): Hartmut Penner <hp@de.ibm.com> |
| 7 | * Martin Schwidefsky <schwidefsky@de.ibm.com> |
| 8 | * Rob van der Heij <rvdhei@iae.nl> |
| 9 | * Heiko Carstens <heiko.carstens@de.ibm.com> |
| 10 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | */ |
| 12 | |
Martin Schwidefsky | 1844c9b | 2010-02-26 22:37:53 +0100 | [diff] [blame] | 13 | #include <linux/init.h> |
| 14 | #include <asm/asm-offsets.h> |
| 15 | #include <asm/thread_info.h> |
| 16 | #include <asm/page.h> |
Heiko Carstens | b1b7030 | 2006-06-29 14:58:17 +0200 | [diff] [blame] | 17 | |
Martin Schwidefsky | 1844c9b | 2010-02-26 22:37:53 +0100 | [diff] [blame] | 18 | __HEAD |
| 19 | .globl startup_continue |
Heiko Carstens | b1b7030 | 2006-06-29 14:58:17 +0200 | [diff] [blame] | 20 | startup_continue: |
Martin Schwidefsky | 1844c9b | 2010-02-26 22:37:53 +0100 | [diff] [blame] | 21 | larl %r1,sched_clock_base_cc |
| 22 | mvc 0(8,%r1),__LC_LAST_UPDATE_CLOCK |
| 23 | larl %r13,.LPG1 # get base |
Heiko Carstens | 25d83cb | 2006-09-28 16:56:37 +0200 | [diff] [blame] | 24 | lctlg %c0,%c15,.Lctl-.LPG1(%r13) # load control registers |
| 25 | lg %r12,.Lparmaddr-.LPG1(%r13) # pointer to parameter area |
| 26 | # move IPL device to lowcore |
Martin Schwidefsky | c742b31 | 2008-12-31 15:11:42 +0100 | [diff] [blame] | 27 | lghi %r0,__LC_PASTE |
| 28 | stg %r0,__LC_VDSO_PER_CPU |
Heiko Carstens | e87bfe5 | 2006-09-20 15:59:15 +0200 | [diff] [blame] | 29 | # |
| 30 | # Setup stack |
| 31 | # |
Heiko Carstens | 25d83cb | 2006-09-28 16:56:37 +0200 | [diff] [blame] | 32 | larl %r15,init_thread_union |
Heiko Carstens | 0c88ee5 | 2009-09-11 10:28:58 +0200 | [diff] [blame] | 33 | stg %r15,__LC_THREAD_INFO # cache thread info in lowcore |
Heiko Carstens | 25d83cb | 2006-09-28 16:56:37 +0200 | [diff] [blame] | 34 | lg %r14,__TI_task(%r15) # cache current in lowcore |
| 35 | stg %r14,__LC_CURRENT |
| 36 | aghi %r15,1<<(PAGE_SHIFT+THREAD_ORDER) # init_task_union + THREAD_SIZE |
| 37 | stg %r15,__LC_KERNEL_STACK # set end of kernel stack |
| 38 | aghi %r15,-160 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | # |
Hongjie Yang | fe355b7 | 2007-02-05 21:18:24 +0100 | [diff] [blame] | 40 | # Save ipl parameters, clear bss memory, initialize storage key for kernel pages, |
| 41 | # and create a kernel NSS if the SAVESYS= parm is defined |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | # |
Hongjie Yang | fe355b7 | 2007-02-05 21:18:24 +0100 | [diff] [blame] | 43 | brasl %r14,startup_init |
Heiko Carstens | 25d83cb | 2006-09-28 16:56:37 +0200 | [diff] [blame] | 44 | lpswe .Lentry-.LPG1(13) # jump to _stext in primary-space, |
| 45 | # virtual and never return ... |
| 46 | .align 16 |
Martin Schwidefsky | 1844c9b | 2010-02-26 22:37:53 +0100 | [diff] [blame] | 47 | .LPG1: |
Heiko Carstens | 25d83cb | 2006-09-28 16:56:37 +0200 | [diff] [blame] | 48 | .Lentry:.quad 0x0000000180000000,_stext |
Gerald Schaefer | 53492b1 | 2008-04-30 13:38:46 +0200 | [diff] [blame] | 49 | .Lctl: .quad 0x04350002 # cr0: various things |
Heiko Carstens | 25d83cb | 2006-09-28 16:56:37 +0200 | [diff] [blame] | 50 | .quad 0 # cr1: primary space segment table |
| 51 | .quad .Lduct # cr2: dispatchable unit control table |
| 52 | .quad 0 # cr3: instruction authorization |
| 53 | .quad 0 # cr4: instruction authorization |
Gerald Schaefer | 482b05d | 2007-03-05 23:35:54 +0100 | [diff] [blame] | 54 | .quad .Lduct # cr5: primary-aste origin |
Heiko Carstens | 25d83cb | 2006-09-28 16:56:37 +0200 | [diff] [blame] | 55 | .quad 0 # cr6: I/O interrupts |
| 56 | .quad 0 # cr7: secondary space segment table |
| 57 | .quad 0 # cr8: access registers translation |
| 58 | .quad 0 # cr9: tracing off |
| 59 | .quad 0 # cr10: tracing off |
| 60 | .quad 0 # cr11: tracing off |
| 61 | .quad 0 # cr12: tracing off |
| 62 | .quad 0 # cr13: home space segment table |
| 63 | .quad 0xc0000000 # cr14: machine check handling off |
| 64 | .quad 0 # cr15: linkage stack operations |
Heiko Carstens | 25d83cb | 2006-09-28 16:56:37 +0200 | [diff] [blame] | 65 | .Lpcmsk:.quad 0x0000000180000000 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | .L4malign:.quad 0xffffffffffc00000 |
Heiko Carstens | 25d83cb | 2006-09-28 16:56:37 +0200 | [diff] [blame] | 67 | .Lscan2g:.quad 0x80000000 + 0x20000 - 8 # 2GB + 128K - 8 |
| 68 | .Lnop: .long 0x07000700 |
Heiko Carstens | b1b7030 | 2006-06-29 14:58:17 +0200 | [diff] [blame] | 69 | .Lparmaddr: |
| 70 | .quad PARMAREA |
Gerald Schaefer | 482b05d | 2007-03-05 23:35:54 +0100 | [diff] [blame] | 71 | .align 64 |
| 72 | .Lduct: .long 0,0,0,0,.Lduald,0,0,0 |
| 73 | .long 0,0,0,0,0,0,0,0 |
| 74 | .align 128 |
| 75 | .Lduald:.rept 8 |
| 76 | .long 0x80000000,0,0,0 # invalid access-list entries |
| 77 | .endr |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | |
Heiko Carstens | 615b04b | 2007-02-21 10:55:37 +0100 | [diff] [blame] | 79 | .globl _ehead |
| 80 | _ehead: |
Martin Schwidefsky | 1844c9b | 2010-02-26 22:37:53 +0100 | [diff] [blame] | 81 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | #ifdef CONFIG_SHARED_KERNEL |
Martin Schwidefsky | 57d8490 | 2010-05-12 09:32:13 +0200 | [diff] [blame] | 83 | .org 0x100000 - 0x11000 # head.o ends at 0x11000 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | #endif |
Heiko Carstens | 25d83cb | 2006-09-28 16:56:37 +0200 | [diff] [blame] | 85 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | # |
Heiko Carstens | b1b7030 | 2006-06-29 14:58:17 +0200 | [diff] [blame] | 87 | # startup-code, running in absolute addressing mode |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | # |
Heiko Carstens | 25d83cb | 2006-09-28 16:56:37 +0200 | [diff] [blame] | 89 | .globl _stext |
| 90 | _stext: basr %r13,0 # get base |
Heiko Carstens | 1e8e338 | 2005-10-30 15:00:11 -0800 | [diff] [blame] | 91 | .LPG3: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | # check control registers |
Heiko Carstens | 25d83cb | 2006-09-28 16:56:37 +0200 | [diff] [blame] | 93 | stctg %c0,%c15,0(%r15) |
| 94 | oi 6(%r15),0x40 # enable sigp emergency signal |
| 95 | oi 4(%r15),0x10 # switch on low address proctection |
| 96 | lctlg %c0,%c15,0(%r15) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | |
Heiko Carstens | 25d83cb | 2006-09-28 16:56:37 +0200 | [diff] [blame] | 98 | lam 0,15,.Laregs-.LPG3(%r13) # load acrs needed by uaccess |
| 99 | brasl %r14,start_kernel # go to C code |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | # |
| 101 | # We returned from start_kernel ?!? PANIK |
| 102 | # |
Heiko Carstens | 25d83cb | 2006-09-28 16:56:37 +0200 | [diff] [blame] | 103 | basr %r13,0 |
| 104 | lpswe .Ldw-.(%r13) # load disabled wait psw |
Heiko Carstens | e87bfe5 | 2006-09-20 15:59:15 +0200 | [diff] [blame] | 105 | |
Heiko Carstens | 25d83cb | 2006-09-28 16:56:37 +0200 | [diff] [blame] | 106 | .align 8 |
| 107 | .Ldw: .quad 0x0002000180000000,0x0000000000000000 |
| 108 | .Laregs:.long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 |