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authorHeiko Carstens <heiko.carstens@de.ibm.com>2005-11-07 03:59:12 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-07 10:53:34 -0500
commit0ad775dbba12de3b7d25f586efe81ad995ca75a7 (patch)
tree4fb33dc988fde1c8fc9088b40c62002fa4793aa2 /arch/s390/kernel
parenta5da866fe0272db6b664d4c790ad98320bf2feb6 (diff)
[PATCH] s390: merge common parts of head.S and head64.S
Merge common parts of head.S and head64.S into head.S and move architecture specific parts to head31.S and head64.S respectively. Saves us ~500 lines of duplicated assembly code. Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/s390/kernel')
-rw-r--r--arch/s390/kernel/Makefile4
-rw-r--r--arch/s390/kernel/head.S382
-rw-r--r--arch/s390/kernel/head31.S336
-rw-r--r--arch/s390/kernel/head64.S538
4 files changed, 380 insertions, 880 deletions
diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile
index 8584dd823218..7434c32bc631 100644
--- a/arch/s390/kernel/Makefile
+++ b/arch/s390/kernel/Makefile
@@ -8,9 +8,7 @@ obj-y := bitmap.o traps.o time.o process.o \
8 setup.o sys_s390.o ptrace.o signal.o cpcmd.o ebcdic.o \ 8 setup.o sys_s390.o ptrace.o signal.o cpcmd.o ebcdic.o \
9 semaphore.o s390_ext.o debug.o profile.o irq.o reipl_diag.o 9 semaphore.o s390_ext.o debug.o profile.o irq.o reipl_diag.o
10 10
11extra-$(CONFIG_ARCH_S390_31) += head.o 11extra-y += head.o init_task.o vmlinux.lds
12extra-$(CONFIG_ARCH_S390X) += head64.o
13extra-y += init_task.o vmlinux.lds
14 12
15obj-$(CONFIG_MODULES) += s390_ksyms.o module.o 13obj-$(CONFIG_MODULES) += s390_ksyms.o module.o
16obj-$(CONFIG_SMP) += smp.o 14obj-$(CONFIG_SMP) += smp.o
diff --git a/arch/s390/kernel/head.S b/arch/s390/kernel/head.S
index 4ca029332114..d31a97c89f68 100644
--- a/arch/s390/kernel/head.S
+++ b/arch/s390/kernel/head.S
@@ -1,11 +1,12 @@
1/* 1/*
2 * arch/s390/kernel/head.S 2 * arch/s390/kernel/head.S
3 * 3 *
4 * S390 version 4 * (C) Copyright IBM Corp. 1999, 2005
5 * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation 5 *
6 * Author(s): Hartmut Penner (hp@de.ibm.com), 6 * Author(s): Hartmut Penner <hp@de.ibm.com>
7 * Martin Schwidefsky (schwidefsky@de.ibm.com), 7 * Martin Schwidefsky <schwidefsky@de.ibm.com>
8 * Rob van der Heij (rvdhei@iae.nl) 8 * Rob van der Heij <rvdhei@iae.nl>
9 * Heiko Carstens <heiko.carstens@de.ibm.com>
9 * 10 *
10 * There are 5 different IPL methods 11 * There are 5 different IPL methods
11 * 1) load the image directly into ram at address 0 and do an PSW restart 12 * 1) load the image directly into ram at address 0 and do an PSW restart
@@ -19,12 +20,7 @@
19 * 5) direct call of start by the SALIPL loader 20 * 5) direct call of start by the SALIPL loader
20 * We use the cpuid to distinguish between VM and native ipl 21 * We use the cpuid to distinguish between VM and native ipl
21 * params for kernel are pushed to 0x10400 (see setup.h) 22 * params for kernel are pushed to 0x10400 (see setup.h)
22 23 *
23 Changes:
24 Okt 25 2000 <rvdheij@iae.nl>
25 added code to skip HDR and EOF to allow SL tape IPL (5 retries)
26 changed first CCW from rewind to backspace block
27
28 */ 24 */
29 25
30#include <linux/config.h> 26#include <linux/config.h>
@@ -34,6 +30,12 @@
34#include <asm/thread_info.h> 30#include <asm/thread_info.h>
35#include <asm/page.h> 31#include <asm/page.h>
36 32
33#ifdef CONFIG_ARCH_S390X
34#define ARCH_OFFSET 4
35#else
36#define ARCH_OFFSET 0
37#endif
38
37#ifndef CONFIG_IPL 39#ifndef CONFIG_IPL
38 .org 0 40 .org 0
39 .long 0x00080000,0x80000000+startup # Just a restart PSW 41 .long 0x00080000,0x80000000+startup # Just a restart PSW
@@ -201,7 +203,7 @@
201 ssch 0(%r3) # load chunk of 1600 bytes 203 ssch 0(%r3) # load chunk of 1600 bytes
202 bnz .Llderr 204 bnz .Llderr
203.Lwait4irq: 205.Lwait4irq:
204 mvc __LC_IO_NEW_PSW(8),.Lnewpsw # set up IO interrupt psw 206 mvc 0x78(8),.Lnewpsw # set up IO interrupt psw
205 lpsw .Lwaitpsw 207 lpsw .Lwaitpsw
206.Lioint: 208.Lioint:
207 c %r1,0xb8 # compare subchannel number 209 c %r1,0xb8 # compare subchannel number
@@ -265,13 +267,13 @@ iplstart:
265 la %r2,IPL_BS # load start address 267 la %r2,IPL_BS # load start address
266 bas %r14,.Lloader # load rest of ipl image 268 bas %r14,.Lloader # load rest of ipl image
267 l %r12,.Lparm # pointer to parameter area 269 l %r12,.Lparm # pointer to parameter area
268 st %r1,IPL_DEVICE-PARMAREA(%r12) # store ipl device number 270 st %r1,IPL_DEVICE+ARCH_OFFSET-PARMAREA(%r12) # save ipl device number
269 271
270# 272#
271# load parameter file from ipl device 273# load parameter file from ipl device
272# 274#
273.Lagain1: 275.Lagain1:
274 l %r2,INITRD_START-PARMAREA(%r12) # use ramdisk location as temp 276 l %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12) # ramdisk loc. is temp
275 bas %r14,.Lloader # load parameter file 277 bas %r14,.Lloader # load parameter file
276 ltr %r2,%r2 # got anything ? 278 ltr %r2,%r2 # got anything ?
277 bz .Lnopf 279 bz .Lnopf
@@ -279,7 +281,7 @@ iplstart:
279 bnh .Lnotrunc 281 bnh .Lnotrunc
280 la %r2,895 282 la %r2,895
281.Lnotrunc: 283.Lnotrunc:
282 l %r4,INITRD_START-PARMAREA(%r12) 284 l %r4,INITRD_START+ARCH_OFFSET-PARMAREA(%r12)
283 clc 0(3,%r4),.L_hdr # if it is HDRx 285 clc 0(3,%r4),.L_hdr # if it is HDRx
284 bz .Lagain1 # skip dataset header 286 bz .Lagain1 # skip dataset header
285 clc 0(3,%r4),.L_eof # if it is EOFx 287 clc 0(3,%r4),.L_eof # if it is EOFx
@@ -322,14 +324,14 @@ iplstart:
322# load ramdisk from ipl device 324# load ramdisk from ipl device
323# 325#
324.Lagain2: 326.Lagain2:
325 l %r2,INITRD_START-PARMAREA(%r12) # load adr. of ramdisk 327 l %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12) # addr of ramdisk
326 bas %r14,.Lloader # load ramdisk 328 bas %r14,.Lloader # load ramdisk
327 st %r2,INITRD_SIZE-PARMAREA(%r12) # store size of ramdisk 329 st %r2,INITRD_SIZE+ARCH_OFFSET-PARMAREA(%r12) # store size of ramdisk
328 ltr %r2,%r2 330 ltr %r2,%r2
329 bnz .Lrdcont 331 bnz .Lrdcont
330 st %r2,INITRD_START-PARMAREA(%r12) # no ramdisk found, null it 332 st %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12) # no ramdisk found
331.Lrdcont: 333.Lrdcont:
332 l %r2,INITRD_START-PARMAREA(%r12) 334 l %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12)
333 335
334 clc 0(3,%r2),.L_hdr # skip HDRx and EOFx 336 clc 0(3,%r2),.L_hdr # skip HDRx and EOFx
335 bz .Lagain2 337 bz .Lagain2
@@ -432,10 +434,10 @@ start:
432 la %r3,1(%r3) 434 la %r3,1(%r3)
433.done: 435.done:
434 l %r1,.memsize 436 l %r1,.memsize
435 st %r3,0(%r1) 437 st %r3,ARCH_OFFSET(%r1)
436 slr %r0,%r0 438 slr %r0,%r0
437 st %r0,INITRD_SIZE-PARMAREA(%r11) 439 st %r0,INITRD_SIZE+ARCH_OFFSET-PARMAREA(%r11)
438 st %r0,INITRD_START-PARMAREA(%r11) 440 st %r0,INITRD_START+ARCH_OFFSET-PARMAREA(%r11)
439 j startup # continue with startup 441 j startup # continue with startup
440.tbl: .long _ebcasc # translate table 442.tbl: .long _ebcasc # translate table
441.cmd: .long COMMAND_LINE # address of command line buffer 443.cmd: .long COMMAND_LINE # address of command line buffer
@@ -478,303 +480,23 @@ start:
478 .byte 0xf0,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7 480 .byte 0xf0,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7
479 .byte 0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfe,0xff 481 .byte 0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfe,0xff
480 482
481# 483.macro GET_IPL_DEVICE
482# startup-code at 0x10000, running in real mode
483# this is called either by the ipl loader or directly by PSW restart
484# or linload or SALIPL
485#
486 .org 0x10000
487startup:basr %r13,0 # get base
488.LPG1: l %r1, .Lget_ipl_device_addr-.LPG1(%r13)
489 basr %r14, %r1
490 lctl %c0,%c15,.Lctl-.LPG1(%r13) # load control registers
491 la %r12,_pstart-.LPG1(%r13) # pointer to parameter area
492 # move IPL device to lowcore
493 mvc __LC_IPLDEV(4),IPL_DEVICE-PARMAREA(%r12)
494
495#
496# clear bss memory
497#
498 l %r2,.Lbss_bgn-.LPG1(%r13) # start of bss
499 l %r3,.Lbss_end-.LPG1(%r13) # end of bss
500 sr %r3,%r2 # length of bss
501 sr %r4,%r4 #
502 sr %r5,%r5 # set src,length and pad to zero
503 sr %r0,%r0 #
504 mvcle %r2,%r4,0 # clear mem
505 jo .-4 # branch back, if not finish
506
507 l %r2,.Lrcp-.LPG1(%r13) # Read SCP forced command word
508.Lservicecall:
509 stosm .Lpmask-.LPG1(%r13),0x01 # authorize ext interrupts
510
511 stctl %r0, %r0,.Lcr-.LPG1(%r13) # get cr0
512 la %r1,0x200 # set bit 22
513 o %r1,.Lcr-.LPG1(%r13) # or old cr0 with r1
514 st %r1,.Lcr-.LPG1(%r13)
515 lctl %r0, %r0,.Lcr-.LPG1(%r13) # load modified cr0
516
517 mvc __LC_EXT_NEW_PSW(8),.Lpcext-.LPG1(%r13) # set postcall psw
518 la %r1, .Lsclph-.LPG1(%r13)
519 a %r1,__LC_EXT_NEW_PSW+4 # set handler
520 st %r1,__LC_EXT_NEW_PSW+4
521
522 la %r4,_pstart-.LPG1(%r13) # %r4 is our index for sccb stuff
523 la %r1, .Lsccb-PARMAREA(%r4) # our sccb
524 .insn rre,0xb2200000,%r2,%r1 # service call
525 ipm %r1
526 srl %r1,28 # get cc code
527 xr %r3, %r3
528 chi %r1,3
529 be .Lfchunk-.LPG1(%r13) # leave
530 chi %r1,2
531 be .Lservicecall-.LPG1(%r13)
532 lpsw .Lwaitsclp-.LPG1(%r13)
533.Lsclph:
534 lh %r1,.Lsccbr-PARMAREA(%r4)
535 chi %r1,0x10 # 0x0010 is the sucess code
536 je .Lprocsccb # let's process the sccb
537 chi %r1,0x1f0
538 bne .Lfchunk-.LPG1(%r13) # unhandled error code
539 c %r2, .Lrcp-.LPG1(%r13) # Did we try Read SCP forced
540 bne .Lfchunk-.LPG1(%r13) # if no, give up
541 l %r2, .Lrcp2-.LPG1(%r13) # try with Read SCP
542 b .Lservicecall-.LPG1(%r13)
543.Lprocsccb:
544 lhi %r1,0
545 icm %r1,3,.Lscpincr1-PARMAREA(%r4) # use this one if != 0
546 jnz .Lscnd
547 lhi %r1,0x800 # otherwise report 2GB
548.Lscnd:
549 lhi %r3,0x800 # limit reported memory size to 2GB
550 cr %r1,%r3
551 jl .Lno2gb
552 lr %r1,%r3
553.Lno2gb:
554 xr %r3,%r3 # same logic
555 ic %r3,.Lscpa1-PARMAREA(%r4)
556 chi %r3,0x00
557 jne .Lcompmem
558 l %r3,.Lscpa2-PARMAREA(%r13)
559.Lcompmem:
560 mr %r2,%r1 # mem in MB on 128-bit
561 l %r1,.Lonemb-.LPG1(%r13)
562 mr %r2,%r1 # mem size in bytes in %r3
563 b .Lfchunk-.LPG1(%r13)
564
565 .align 4
566.Lget_ipl_device_addr:
567 .long .Lget_ipl_device
568.Lpmask:
569 .byte 0
570.align 8
571.Lpcext:.long 0x00080000,0x80000000
572.Lcr:
573 .long 0x00 # place holder for cr0
574.Lwaitsclp:
575 .long 0x010a0000,0x80000000 + .Lsclph
576.Lrcp:
577 .int 0x00120001 # Read SCP forced code
578.Lrcp2:
579 .int 0x00020001 # Read SCP code
580.Lonemb:
581 .int 0x100000
582.Lfchunk:
583
584#
585# find memory chunks.
586#
587 lr %r9,%r3 # end of mem
588 mvc __LC_PGM_NEW_PSW(8),.Lpcmem-.LPG1(%r13)
589 la %r1,1 # test in increments of 128KB
590 sll %r1,17
591 l %r3,.Lmchunk-.LPG1(%r13) # get pointer to memory_chunk array
592 slr %r4,%r4 # set start of chunk to zero
593 slr %r5,%r5 # set end of chunk to zero
594 slr %r6,%r6 # set access code to zero
595 la %r10, MEMORY_CHUNKS # number of chunks
596.Lloop:
597 tprot 0(%r5),0 # test protection of first byte
598 ipm %r7
599 srl %r7,28
600 clr %r6,%r7 # compare cc with last access code
601 be .Lsame-.LPG1(%r13)
602 b .Lchkmem-.LPG1(%r13)
603.Lsame:
604 ar %r5,%r1 # add 128KB to end of chunk
605 bno .Lloop-.LPG1(%r13) # r1 < 0x80000000 -> loop
606.Lchkmem: # > 2GB or tprot got a program check
607 clr %r4,%r5 # chunk size > 0?
608 be .Lchkloop-.LPG1(%r13)
609 st %r4,0(%r3) # store start address of chunk
610 lr %r0,%r5
611 slr %r0,%r4
612 st %r0,4(%r3) # store size of chunk
613 st %r6,8(%r3) # store type of chunk
614 la %r3,12(%r3)
615 l %r4,.Lmemsize-.LPG1(%r13) # address of variable memory_size
616 st %r5,0(%r4) # store last end to memory size
617 ahi %r10,-1 # update chunk number
618.Lchkloop:
619 lr %r6,%r7 # set access code to last cc
620 # we got an exception or we're starting a new
621 # chunk , we must check if we should
622 # still try to find valid memory (if we detected
623 # the amount of available storage), and if we
624 # have chunks left
625 xr %r0,%r0
626 clr %r0,%r9 # did we detect memory?
627 je .Ldonemem # if not, leave
628 chi %r10,0 # do we have chunks left?
629 je .Ldonemem
630 alr %r5,%r1 # add 128KB to end of chunk
631 lr %r4,%r5 # potential new chunk
632 clr %r5,%r9 # should we go on?
633 jl .Lloop
634.Ldonemem:
635 l %r12,.Lmflags-.LPG1(%r13) # get address of machine_flags
636#
637# find out if we are running under VM
638#
639 stidp __LC_CPUID # store cpuid
640 tm __LC_CPUID,0xff # running under VM ?
641 bno .Lnovm-.LPG1(%r13)
642 oi 3(%r12),1 # set VM flag
643.Lnovm:
644 lh %r0,__LC_CPUID+4 # get cpu version
645 chi %r0,0x7490 # running on a P/390 ?
646 bne .Lnop390-.LPG1(%r13)
647 oi 3(%r12),4 # set P/390 flag
648.Lnop390:
649
650#
651# find out if we have an IEEE fpu
652#
653 mvc __LC_PGM_NEW_PSW(8),.Lpcfpu-.LPG1(%r13)
654 efpc %r0,0 # test IEEE extract fpc instruction
655 oi 3(%r12),2 # set IEEE fpu flag
656.Lchkfpu:
657
658#
659# find out if we have the CSP instruction
660#
661 mvc __LC_PGM_NEW_PSW(8),.Lpccsp-.LPG1(%r13)
662 la %r0,0
663 lr %r1,%r0
664 la %r2,4
665 csp %r0,%r2 # Test CSP instruction
666 oi 3(%r12),8 # set CSP flag
667.Lchkcsp:
668
669#
670# find out if we have the MVPG instruction
671#
672 mvc __LC_PGM_NEW_PSW(8),.Lpcmvpg-.LPG1(%r13)
673 sr %r0,%r0
674 la %r1,0
675 la %r2,0
676 mvpg %r1,%r2 # Test CSP instruction
677 oi 3(%r12),16 # set MVPG flag
678.Lchkmvpg:
679
680#
681# find out if we have the IDTE instruction
682#
683 mvc __LC_PGM_NEW_PSW(8),.Lpcidte-.LPG1(%r13)
684 .long 0xb2b10000 # store facility list
685 tm 0xc8,0x08 # check bit for clearing-by-ASCE
686 bno .Lchkidte-.LPG1(%r13)
687 lhi %r1,2094
688 lhi %r2,0
689 .long 0xb98e2001
690 oi 3(%r12),0x80 # set IDTE flag
691.Lchkidte:
692
693 lpsw .Lentry-.LPG1(13) # jump to _stext in primary-space,
694 # virtual and never return ...
695 .align 8
696.Lentry:.long 0x00080000,0x80000000 + _stext
697.Lctl: .long 0x04b50002 # cr0: various things
698 .long 0 # cr1: primary space segment table
699 .long .Lduct # cr2: dispatchable unit control table
700 .long 0 # cr3: instruction authorization
701 .long 0 # cr4: instruction authorization
702 .long 0xffffffff # cr5: primary-aste origin
703 .long 0 # cr6: I/O interrupts
704 .long 0 # cr7: secondary space segment table
705 .long 0 # cr8: access registers translation
706 .long 0 # cr9: tracing off
707 .long 0 # cr10: tracing off
708 .long 0 # cr11: tracing off
709 .long 0 # cr12: tracing off
710 .long 0 # cr13: home space segment table
711 .long 0xc0000000 # cr14: machine check handling off
712 .long 0 # cr15: linkage stack operations
713.Lpcmem:.long 0x00080000,0x80000000 + .Lchkmem
714.Lpcfpu:.long 0x00080000,0x80000000 + .Lchkfpu
715.Lpccsp:.long 0x00080000,0x80000000 + .Lchkcsp
716.Lpcmvpg:.long 0x00080000,0x80000000 + .Lchkmvpg
717.Lpcidte:.long 0x00080000,0x80000000 + .Lchkidte
718.Lmemsize:.long memory_size
719.Lmchunk:.long memory_chunk
720.Lmflags:.long machine_flags
721.Lbss_bgn: .long __bss_start
722.Lbss_end: .long _end
723
724 .org PARMAREA-64
725.Lduct: .long 0,0,0,0,0,0,0,0
726 .long 0,0,0,0,0,0,0,0
727
728#
729# params at 10400 (setup.h)
730#
731 .org PARMAREA
732 .global _pstart
733_pstart:
734 .long 0,0 # IPL_DEVICE
735 .long 0,RAMDISK_ORIGIN # INITRD_START
736 .long 0,RAMDISK_SIZE # INITRD_SIZE
737
738 .org COMMAND_LINE
739 .byte "root=/dev/ram0 ro"
740 .byte 0
741 .org 0x11000
742.Lsccb:
743 .hword 0x1000 # length, one page
744 .byte 0x00,0x00,0x00
745 .byte 0x80 # variable response bit set
746.Lsccbr:
747 .hword 0x00 # response code
748.Lscpincr1:
749 .hword 0x00
750.Lscpa1:
751 .byte 0x00
752 .fill 89,1,0
753.Lscpa2:
754 .int 0x00
755.Lscpincr2:
756 .quad 0x00
757 .fill 3984,1,0
758 .org 0x12000
759 .global _pend
760_pend:
761
762.Lget_ipl_device: 484.Lget_ipl_device:
763 basr %r12,0 485 basr %r12,0
764.LPG2: l %r1,0xb8 # get sid 486.LGID: l %r1,0xb8 # get sid
765 sll %r1,15 # test if subchannel is enabled 487 sll %r1,15 # test if subchannel is enabled
766 srl %r1,31 488 srl %r1,31
767 ltr %r1,%r1 489 ltr %r1,%r1
768 bz 0(%r14) # subchannel disabled 490 bz 0(%r14) # subchannel disabled
769 l %r1,0xb8 491 l %r1,0xb8
770 la %r5,.Lipl_schib-.LPG2(%r12) 492 la %r5,.Lipl_schib-.LGID(%r12)
771 stsch 0(%r5) # get schib of subchannel 493 stsch 0(%r5) # get schib of subchannel
772 bnz 0(%r14) # schib not available 494 bnz 0(%r14) # schib not available
773 tm 5(%r5),0x01 # devno valid? 495 tm 5(%r5),0x01 # devno valid?
774 bno 0(%r14) 496 bno 0(%r14)
775 la %r6,ipl_parameter_flags-.LPG2(%r12) 497 la %r6,ipl_parameter_flags-.LGID(%r12)
776 oi 3(%r6),0x01 # set flag 498 oi 3(%r6),0x01 # set flag
777 la %r2,ipl_devno-.LPG2(%r12) 499 la %r2,ipl_devno-.LGID(%r12)
778 mvc 0(2,%r2),6(%r5) # store devno 500 mvc 0(2,%r2),6(%r5) # store devno
779 tm 4(%r5),0x80 # qdio capable device? 501 tm 4(%r5),0x80 # qdio capable device?
780 bno 0(%r14) 502 bno 0(%r14)
@@ -815,46 +537,10 @@ ipl_parameter_flags:
815 .globl ipl_devno 537 .globl ipl_devno
816ipl_devno: 538ipl_devno:
817 .word 0 539 .word 0
540.endm
818 541
819#ifdef CONFIG_SHARED_KERNEL 542#ifdef CONFIG_ARCH_S390X
820 .org 0x100000 543#include "head64.S"
544#else
545#include "head31.S"
821#endif 546#endif
822
823#
824# startup-code, running in virtual mode
825#
826 .globl _stext
827_stext: basr %r13,0 # get base
828.LPG3:
829#
830# Setup stack
831#
832 l %r15,.Linittu-.LPG3(%r13)
833 mvc __LC_CURRENT(4),__TI_task(%r15)
834 ahi %r15,1<<(PAGE_SHIFT+THREAD_ORDER) # init_task_union + THREAD_SIZE
835 st %r15,__LC_KERNEL_STACK # set end of kernel stack
836 ahi %r15,-96
837 xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15) # clear backchain
838
839# check control registers
840 stctl %c0,%c15,0(%r15)
841 oi 2(%r15),0x40 # enable sigp emergency signal
842 oi 0(%r15),0x10 # switch on low address protection
843 lctl %c0,%c15,0(%r15)
844
845#
846 lam 0,15,.Laregs-.LPG3(%r13) # load access regs needed by uaccess
847 l %r14,.Lstart-.LPG3(%r13)
848 basr %r14,%r14 # call start_kernel
849#
850# We returned from start_kernel ?!? PANIK
851#
852 basr %r13,0
853 lpsw .Ldw-.(%r13) # load disabled wait psw
854#
855 .align 8
856.Ldw: .long 0x000a0000,0x00000000
857.Linittu: .long init_thread_union
858.Lstart: .long start_kernel
859.Laregs: .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
860
diff --git a/arch/s390/kernel/head31.S b/arch/s390/kernel/head31.S
new file mode 100644
index 000000000000..2d3b089bfb83
--- /dev/null
+++ b/arch/s390/kernel/head31.S
@@ -0,0 +1,336 @@
1/*
2 * arch/s390/kernel/head31.S
3 *
4 * (C) Copyright IBM Corp. 2005
5 *
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 *
11 */
12
13#
14# startup-code at 0x10000, running in absolute addressing mode
15# this is called either by the ipl loader or directly by PSW restart
16# or linload or SALIPL
17#
18 .org 0x10000
19startup:basr %r13,0 # get base
20.LPG1: l %r1, .Lget_ipl_device_addr-.LPG1(%r13)
21 basr %r14, %r1
22 lctl %c0,%c15,.Lctl-.LPG1(%r13) # load control registers
23 la %r12,_pstart-.LPG1(%r13) # pointer to parameter area
24 # move IPL device to lowcore
25 mvc __LC_IPLDEV(4),IPL_DEVICE-PARMAREA(%r12)
26
27#
28# clear bss memory
29#
30 l %r2,.Lbss_bgn-.LPG1(%r13) # start of bss
31 l %r3,.Lbss_end-.LPG1(%r13) # end of bss
32 sr %r3,%r2 # length of bss
33 sr %r4,%r4
34 sr %r5,%r5 # set src,length and pad to zero
35 sr %r0,%r0
36 mvcle %r2,%r4,0 # clear mem
37 jo .-4 # branch back, if not finish
38
39 l %r2,.Lrcp-.LPG1(%r13) # Read SCP forced command word
40.Lservicecall:
41 stosm .Lpmask-.LPG1(%r13),0x01 # authorize ext interrupts
42
43 stctl %r0, %r0,.Lcr-.LPG1(%r13) # get cr0
44 la %r1,0x200 # set bit 22
45 o %r1,.Lcr-.LPG1(%r13) # or old cr0 with r1
46 st %r1,.Lcr-.LPG1(%r13)
47 lctl %r0, %r0,.Lcr-.LPG1(%r13) # load modified cr0
48
49 mvc __LC_EXT_NEW_PSW(8),.Lpcext-.LPG1(%r13) # set postcall psw
50 la %r1, .Lsclph-.LPG1(%r13)
51 a %r1,__LC_EXT_NEW_PSW+4 # set handler
52 st %r1,__LC_EXT_NEW_PSW+4
53
54 la %r4,_pstart-.LPG1(%r13) # %r4 is our index for sccb stuff
55 la %r1, .Lsccb-PARMAREA(%r4) # our sccb
56 .insn rre,0xb2200000,%r2,%r1 # service call
57 ipm %r1
58 srl %r1,28 # get cc code
59 xr %r3, %r3
60 chi %r1,3
61 be .Lfchunk-.LPG1(%r13) # leave
62 chi %r1,2
63 be .Lservicecall-.LPG1(%r13)
64 lpsw .Lwaitsclp-.LPG1(%r13)
65.Lsclph:
66 lh %r1,.Lsccbr-PARMAREA(%r4)
67 chi %r1,0x10 # 0x0010 is the sucess code
68 je .Lprocsccb # let's process the sccb
69 chi %r1,0x1f0
70 bne .Lfchunk-.LPG1(%r13) # unhandled error code
71 c %r2, .Lrcp-.LPG1(%r13) # Did we try Read SCP forced
72 bne .Lfchunk-.LPG1(%r13) # if no, give up
73 l %r2, .Lrcp2-.LPG1(%r13) # try with Read SCP
74 b .Lservicecall-.LPG1(%r13)
75.Lprocsccb:
76 lhi %r1,0
77 icm %r1,3,.Lscpincr1-PARMAREA(%r4) # use this one if != 0
78 jnz .Lscnd
79 lhi %r1,0x800 # otherwise report 2GB
80.Lscnd:
81 lhi %r3,0x800 # limit reported memory size to 2GB
82 cr %r1,%r3
83 jl .Lno2gb
84 lr %r1,%r3
85.Lno2gb:
86 xr %r3,%r3 # same logic
87 ic %r3,.Lscpa1-PARMAREA(%r4)
88 chi %r3,0x00
89 jne .Lcompmem
90 l %r3,.Lscpa2-PARMAREA(%r13)
91.Lcompmem:
92 mr %r2,%r1 # mem in MB on 128-bit
93 l %r1,.Lonemb-.LPG1(%r13)
94 mr %r2,%r1 # mem size in bytes in %r3
95 b .Lfchunk-.LPG1(%r13)
96
97 .align 4
98.Lget_ipl_device_addr:
99 .long .Lget_ipl_device
100.Lpmask:
101 .byte 0
102.align 8
103.Lpcext:.long 0x00080000,0x80000000
104.Lcr:
105 .long 0x00 # place holder for cr0
106.Lwaitsclp:
107 .long 0x010a0000,0x80000000 + .Lsclph
108.Lrcp:
109 .int 0x00120001 # Read SCP forced code
110.Lrcp2:
111 .int 0x00020001 # Read SCP code
112.Lonemb:
113 .int 0x100000
114.Lfchunk:
115
116#
117# find memory chunks.
118#
119 lr %r9,%r3 # end of mem
120 mvc __LC_PGM_NEW_PSW(8),.Lpcmem-.LPG1(%r13)
121 la %r1,1 # test in increments of 128KB
122 sll %r1,17
123 l %r3,.Lmchunk-.LPG1(%r13) # get pointer to memory_chunk array
124 slr %r4,%r4 # set start of chunk to zero
125 slr %r5,%r5 # set end of chunk to zero
126 slr %r6,%r6 # set access code to zero
127 la %r10, MEMORY_CHUNKS # number of chunks
128.Lloop:
129 tprot 0(%r5),0 # test protection of first byte
130 ipm %r7
131 srl %r7,28
132 clr %r6,%r7 # compare cc with last access code
133 be .Lsame-.LPG1(%r13)
134 b .Lchkmem-.LPG1(%r13)
135.Lsame:
136 ar %r5,%r1 # add 128KB to end of chunk
137 bno .Lloop-.LPG1(%r13) # r1 < 0x80000000 -> loop
138.Lchkmem: # > 2GB or tprot got a program check
139 clr %r4,%r5 # chunk size > 0?
140 be .Lchkloop-.LPG1(%r13)
141 st %r4,0(%r3) # store start address of chunk
142 lr %r0,%r5
143 slr %r0,%r4
144 st %r0,4(%r3) # store size of chunk
145 st %r6,8(%r3) # store type of chunk
146 la %r3,12(%r3)
147 l %r4,.Lmemsize-.LPG1(%r13) # address of variable memory_size
148 st %r5,0(%r4) # store last end to memory size
149 ahi %r10,-1 # update chunk number
150.Lchkloop:
151 lr %r6,%r7 # set access code to last cc
152 # we got an exception or we're starting a new
153 # chunk , we must check if we should
154 # still try to find valid memory (if we detected
155 # the amount of available storage), and if we
156 # have chunks left
157 xr %r0,%r0
158 clr %r0,%r9 # did we detect memory?
159 je .Ldonemem # if not, leave
160 chi %r10,0 # do we have chunks left?
161 je .Ldonemem
162 alr %r5,%r1 # add 128KB to end of chunk
163 lr %r4,%r5 # potential new chunk
164 clr %r5,%r9 # should we go on?
165 jl .Lloop
166.Ldonemem:
167 l %r12,.Lmflags-.LPG1(%r13) # get address of machine_flags
168#
169# find out if we are running under VM
170#
171 stidp __LC_CPUID # store cpuid
172 tm __LC_CPUID,0xff # running under VM ?
173 bno .Lnovm-.LPG1(%r13)
174 oi 3(%r12),1 # set VM flag
175.Lnovm:
176 lh %r0,__LC_CPUID+4 # get cpu version
177 chi %r0,0x7490 # running on a P/390 ?
178 bne .Lnop390-.LPG1(%r13)
179 oi 3(%r12),4 # set P/390 flag
180.Lnop390:
181
182#
183# find out if we have an IEEE fpu
184#
185 mvc __LC_PGM_NEW_PSW(8),.Lpcfpu-.LPG1(%r13)
186 efpc %r0,0 # test IEEE extract fpc instruction
187 oi 3(%r12),2 # set IEEE fpu flag
188.Lchkfpu:
189
190#
191# find out if we have the CSP instruction
192#
193 mvc __LC_PGM_NEW_PSW(8),.Lpccsp-.LPG1(%r13)
194 la %r0,0
195 lr %r1,%r0
196 la %r2,4
197 csp %r0,%r2 # Test CSP instruction
198 oi 3(%r12),8 # set CSP flag
199.Lchkcsp:
200
201#
202# find out if we have the MVPG instruction
203#
204 mvc __LC_PGM_NEW_PSW(8),.Lpcmvpg-.LPG1(%r13)
205 sr %r0,%r0
206 la %r1,0
207 la %r2,0
208 mvpg %r1,%r2 # Test CSP instruction
209 oi 3(%r12),16 # set MVPG flag
210.Lchkmvpg:
211
212#
213# find out if we have the IDTE instruction
214#
215 mvc __LC_PGM_NEW_PSW(8),.Lpcidte-.LPG1(%r13)
216 .long 0xb2b10000 # store facility list
217 tm 0xc8,0x08 # check bit for clearing-by-ASCE
218 bno .Lchkidte-.LPG1(%r13)
219 lhi %r1,2094
220 lhi %r2,0
221 .long 0xb98e2001
222 oi 3(%r12),0x80 # set IDTE flag
223.Lchkidte:
224
225 lpsw .Lentry-.LPG1(13) # jump to _stext in primary-space,
226 # virtual and never return ...
227 .align 8
228.Lentry:.long 0x00080000,0x80000000 + _stext
229.Lctl: .long 0x04b50002 # cr0: various things
230 .long 0 # cr1: primary space segment table
231 .long .Lduct # cr2: dispatchable unit control table
232 .long 0 # cr3: instruction authorization
233 .long 0 # cr4: instruction authorization
234 .long 0xffffffff # cr5: primary-aste origin
235 .long 0 # cr6: I/O interrupts
236 .long 0 # cr7: secondary space segment table
237 .long 0 # cr8: access registers translation
238 .long 0 # cr9: tracing off
239 .long 0 # cr10: tracing off
240 .long 0 # cr11: tracing off
241 .long 0 # cr12: tracing off
242 .long 0 # cr13: home space segment table
243 .long 0xc0000000 # cr14: machine check handling off
244 .long 0 # cr15: linkage stack operations
245.Lpcmem:.long 0x00080000,0x80000000 + .Lchkmem
246.Lpcfpu:.long 0x00080000,0x80000000 + .Lchkfpu
247.Lpccsp:.long 0x00080000,0x80000000 + .Lchkcsp
248.Lpcmvpg:.long 0x00080000,0x80000000 + .Lchkmvpg
249.Lpcidte:.long 0x00080000,0x80000000 + .Lchkidte
250.Lmemsize:.long memory_size
251.Lmchunk:.long memory_chunk
252.Lmflags:.long machine_flags
253.Lbss_bgn: .long __bss_start
254.Lbss_end: .long _end
255
256 .org PARMAREA-64
257.Lduct: .long 0,0,0,0,0,0,0,0
258 .long 0,0,0,0,0,0,0,0
259
260#
261# params at 10400 (setup.h)
262#
263 .org PARMAREA
264 .global _pstart
265_pstart:
266 .long 0,0 # IPL_DEVICE
267 .long 0,RAMDISK_ORIGIN # INITRD_START
268 .long 0,RAMDISK_SIZE # INITRD_SIZE
269
270 .org COMMAND_LINE
271 .byte "root=/dev/ram0 ro"
272 .byte 0
273 .org 0x11000
274.Lsccb:
275 .hword 0x1000 # length, one page
276 .byte 0x00,0x00,0x00
277 .byte 0x80 # variable response bit set
278.Lsccbr:
279 .hword 0x00 # response code
280.Lscpincr1:
281 .hword 0x00
282.Lscpa1:
283 .byte 0x00
284 .fill 89,1,0
285.Lscpa2:
286 .int 0x00
287.Lscpincr2:
288 .quad 0x00
289 .fill 3984,1,0
290 .org 0x12000
291 .global _pend
292_pend:
293
294 GET_IPL_DEVICE
295
296#ifdef CONFIG_SHARED_KERNEL
297 .org 0x100000
298#endif
299
300#
301# startup-code, running in virtual mode
302#
303 .globl _stext
304_stext: basr %r13,0 # get base
305.LPG3:
306#
307# Setup stack
308#
309 l %r15,.Linittu-.LPG3(%r13)
310 mvc __LC_CURRENT(4),__TI_task(%r15)
311 ahi %r15,1<<(PAGE_SHIFT+THREAD_ORDER) # init_task_union+THREAD_SIZE
312 st %r15,__LC_KERNEL_STACK # set end of kernel stack
313 ahi %r15,-96
314 xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15) # clear backchain
315
316# check control registers
317 stctl %c0,%c15,0(%r15)
318 oi 2(%r15),0x40 # enable sigp emergency signal
319 oi 0(%r15),0x10 # switch on low address protection
320 lctl %c0,%c15,0(%r15)
321
322#
323 lam 0,15,.Laregs-.LPG3(%r13) # load access regs needed by uaccess
324 l %r14,.Lstart-.LPG3(%r13)
325 basr %r14,%r14 # call start_kernel
326#
327# We returned from start_kernel ?!? PANIK
328#
329 basr %r13,0
330 lpsw .Ldw-.(%r13) # load disabled wait psw
331#
332 .align 8
333.Ldw: .long 0x000a0000,0x00000000
334.Linittu:.long init_thread_union
335.Lstart:.long start_kernel
336.Laregs:.long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
diff --git a/arch/s390/kernel/head64.S b/arch/s390/kernel/head64.S
index d9be8f96f2e0..f08c06f45d5c 100644
--- a/arch/s390/kernel/head64.S
+++ b/arch/s390/kernel/head64.S
@@ -1,482 +1,17 @@
1/* 1/*
2 * arch/s390/kernel/head.S 2 * arch/s390/kernel/head64.S
3 * 3 *
4 * S390 version 4 * (C) Copyright IBM Corp. 1999,2005
5 * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation 5 *
6 * Author(s): Hartmut Penner (hp@de.ibm.com), 6 * Author(s): Hartmut Penner <hp@de.ibm.com>
7 * Martin Schwidefsky (schwidefsky@de.ibm.com), 7 * Martin Schwidefsky <schwidefsky@de.ibm.com>
8 * Rob van der Heij (rvdhei@iae.nl) 8 * Rob van der Heij <rvdhei@iae.nl>
9 * Heiko Carstens <heiko.carstens@de.ibm.com>
9 * 10 *
10 * There are 5 different IPL methods
11 * 1) load the image directly into ram at address 0 and do an PSW restart
12 * 2) linload will load the image from address 0x10000 to memory 0x10000
13 * and start the code thru LPSW 0x0008000080010000 (VM only, deprecated)
14 * 3) generate the tape ipl header, store the generated image on a tape
15 * and ipl from it
16 * In case of SL tape you need to IPL 5 times to get past VOL1 etc
17 * 4) generate the vm reader ipl header, move the generated image to the
18 * VM reader (use option NOH!) and do a ipl from reader (VM only)
19 * 5) direct call of start by the SALIPL loader
20 * We use the cpuid to distinguish between VM and native ipl
21 * params for kernel are pushed to 0x10400 (see setup.h)
22
23 Changes:
24 Okt 25 2000 <rvdheij@iae.nl>
25 added code to skip HDR and EOF to allow SL tape IPL (5 retries)
26 changed first CCW from rewind to backspace block
27
28 */ 11 */
29 12
30#include <linux/config.h>
31#include <asm/setup.h>
32#include <asm/lowcore.h>
33#include <asm/asm-offsets.h>
34#include <asm/thread_info.h>
35#include <asm/page.h>
36
37#ifndef CONFIG_IPL
38 .org 0
39 .long 0x00080000,0x80000000+startup # Just a restart PSW
40#else
41#ifdef CONFIG_IPL_TAPE
42#define IPL_BS 1024
43 .org 0
44 .long 0x00080000,0x80000000+iplstart # The first 24 bytes are loaded
45 .long 0x27000000,0x60000001 # by ipl to addresses 0-23.
46 .long 0x02000000,0x20000000+IPL_BS # (a PSW and two CCWs).
47 .long 0x00000000,0x00000000 # external old psw
48 .long 0x00000000,0x00000000 # svc old psw
49 .long 0x00000000,0x00000000 # program check old psw
50 .long 0x00000000,0x00000000 # machine check old psw
51 .long 0x00000000,0x00000000 # io old psw
52 .long 0x00000000,0x00000000
53 .long 0x00000000,0x00000000
54 .long 0x00000000,0x00000000
55 .long 0x000a0000,0x00000058 # external new psw
56 .long 0x000a0000,0x00000060 # svc new psw
57 .long 0x000a0000,0x00000068 # program check new psw
58 .long 0x000a0000,0x00000070 # machine check new psw
59 .long 0x00080000,0x80000000+.Lioint # io new psw
60
61 .org 0x100
62#
63# subroutine for loading from tape
64# Paramters:
65# R1 = device number
66# R2 = load address
67.Lloader:
68 st %r14,.Lldret
69 la %r3,.Lorbread # r3 = address of orb
70 la %r5,.Lirb # r5 = address of irb
71 st %r2,.Lccwread+4 # initialize CCW data addresses
72 lctl %c6,%c6,.Lcr6
73 slr %r2,%r2
74.Lldlp:
75 la %r6,3 # 3 retries
76.Lssch:
77 ssch 0(%r3) # load chunk of IPL_BS bytes
78 bnz .Llderr
79.Lw4end:
80 bas %r14,.Lwait4io
81 tm 8(%r5),0x82 # do we have a problem ?
82 bnz .Lrecov
83 slr %r7,%r7
84 icm %r7,3,10(%r5) # get residual count
85 lcr %r7,%r7
86 la %r7,IPL_BS(%r7) # IPL_BS-residual=#bytes read
87 ar %r2,%r7 # add to total size
88 tm 8(%r5),0x01 # found a tape mark ?
89 bnz .Ldone
90 l %r0,.Lccwread+4 # update CCW data addresses
91 ar %r0,%r7
92 st %r0,.Lccwread+4
93 b .Lldlp
94.Ldone:
95 l %r14,.Lldret
96 br %r14 # r2 contains the total size
97.Lrecov:
98 bas %r14,.Lsense # do the sensing
99 bct %r6,.Lssch # dec. retry count & branch
100 b .Llderr
101#
102# Sense subroutine
103#
104.Lsense:
105 st %r14,.Lsnsret
106 la %r7,.Lorbsense
107 ssch 0(%r7) # start sense command
108 bnz .Llderr
109 bas %r14,.Lwait4io
110 l %r14,.Lsnsret
111 tm 8(%r5),0x82 # do we have a problem ?
112 bnz .Llderr
113 br %r14
114#
115# Wait for interrupt subroutine
116#
117.Lwait4io:
118 lpsw .Lwaitpsw
119.Lioint:
120 c %r1,0xb8 # compare subchannel number
121 bne .Lwait4io
122 tsch 0(%r5)
123 slr %r0,%r0
124 tm 8(%r5),0x82 # do we have a problem ?
125 bnz .Lwtexit
126 tm 8(%r5),0x04 # got device end ?
127 bz .Lwait4io
128.Lwtexit:
129 br %r14
130.Llderr:
131 lpsw .Lcrash
132
133 .align 8
134.Lorbread:
135 .long 0x00000000,0x0080ff00,.Lccwread
136 .align 8
137.Lorbsense:
138 .long 0x00000000,0x0080ff00,.Lccwsense
139 .align 8
140.Lccwread:
141 .long 0x02200000+IPL_BS,0x00000000
142.Lccwsense:
143 .long 0x04200001,0x00000000
144.Lwaitpsw:
145 .long 0x020a0000,0x80000000+.Lioint
146
147.Lirb: .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
148.Lcr6: .long 0xff000000
149 .align 8
150.Lcrash:.long 0x000a0000,0x00000000
151.Lldret:.long 0
152.Lsnsret: .long 0
153#endif /* CONFIG_IPL_TAPE */
154
155#ifdef CONFIG_IPL_VM
156#define IPL_BS 0x730
157 .org 0
158 .long 0x00080000,0x80000000+iplstart # The first 24 bytes are loaded
159 .long 0x02000018,0x60000050 # by ipl to addresses 0-23.
160 .long 0x02000068,0x60000050 # (a PSW and two CCWs).
161 .fill 80-24,1,0x40 # bytes 24-79 are discarded !!
162 .long 0x020000f0,0x60000050 # The next 160 byte are loaded
163 .long 0x02000140,0x60000050 # to addresses 0x18-0xb7
164 .long 0x02000190,0x60000050 # They form the continuation
165 .long 0x020001e0,0x60000050 # of the CCW program started
166 .long 0x02000230,0x60000050 # by ipl and load the range
167 .long 0x02000280,0x60000050 # 0x0f0-0x730 from the image
168 .long 0x020002d0,0x60000050 # to the range 0x0f0-0x730
169 .long 0x02000320,0x60000050 # in memory. At the end of
170 .long 0x02000370,0x60000050 # the channel program the PSW
171 .long 0x020003c0,0x60000050 # at location 0 is loaded.
172 .long 0x02000410,0x60000050 # Initial processing starts
173 .long 0x02000460,0x60000050 # at 0xf0 = iplstart.
174 .long 0x020004b0,0x60000050
175 .long 0x02000500,0x60000050
176 .long 0x02000550,0x60000050
177 .long 0x020005a0,0x60000050
178 .long 0x020005f0,0x60000050
179 .long 0x02000640,0x60000050
180 .long 0x02000690,0x60000050
181 .long 0x020006e0,0x20000050
182
183 .org 0xf0
184#
185# subroutine for loading cards from the reader
186#
187.Lloader:
188 la %r3,.Lorb # r2 = address of orb into r2
189 la %r5,.Lirb # r4 = address of irb
190 la %r6,.Lccws
191 la %r7,20
192.Linit:
193 st %r2,4(%r6) # initialize CCW data addresses
194 la %r2,0x50(%r2)
195 la %r6,8(%r6)
196 bct 7,.Linit
197
198 lctl %c6,%c6,.Lcr6 # set IO subclass mask
199 slr %r2,%r2
200.Lldlp:
201 ssch 0(%r3) # load chunk of 1600 bytes
202 bnz .Llderr
203.Lwait4irq:
204 mvc 0x78(8),.Lnewpsw # set up IO interrupt psw
205 lpsw .Lwaitpsw
206.Lioint:
207 c %r1,0xb8 # compare subchannel number
208 bne .Lwait4irq
209 tsch 0(%r5)
210
211 slr %r0,%r0
212 ic %r0,8(%r5) # get device status
213 chi %r0,8 # channel end ?
214 be .Lcont
215 chi %r0,12 # channel end + device end ?
216 be .Lcont
217
218 l %r0,4(%r5)
219 s %r0,8(%r3) # r0/8 = number of ccws executed
220 mhi %r0,10 # *10 = number of bytes in ccws
221 lh %r3,10(%r5) # get residual count
222 sr %r0,%r3 # #ccws*80-residual=#bytes read
223 ar %r2,%r0
224
225 br %r14 # r2 contains the total size
226
227.Lcont:
228 ahi %r2,0x640 # add 0x640 to total size
229 la %r6,.Lccws
230 la %r7,20
231.Lincr:
232 l %r0,4(%r6) # update CCW data addresses
233 ahi %r0,0x640
234 st %r0,4(%r6)
235 ahi %r6,8
236 bct 7,.Lincr
237
238 b .Lldlp
239.Llderr:
240 lpsw .Lcrash
241
242 .align 8
243.Lorb: .long 0x00000000,0x0080ff00,.Lccws
244.Lirb: .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
245.Lcr6: .long 0xff000000
246.Lloadp:.long 0,0
247 .align 8
248.Lcrash:.long 0x000a0000,0x00000000
249.Lnewpsw:
250 .long 0x00080000,0x80000000+.Lioint
251.Lwaitpsw:
252 .long 0x020a0000,0x80000000+.Lioint
253
254 .align 8
255.Lccws: .rept 19
256 .long 0x02600050,0x00000000
257 .endr
258 .long 0x02200050,0x00000000
259#endif /* CONFIG_IPL_VM */
260
261iplstart:
262 lh %r1,0xb8 # test if subchannel number
263 bct %r1,.Lnoload # is valid
264 l %r1,0xb8 # load ipl subchannel number
265 la %r2,IPL_BS # load start address
266 bas %r14,.Lloader # load rest of ipl image
267 larl %r12,_pstart # pointer to parameter area
268 st %r1,IPL_DEVICE+4-PARMAREA(%r12) # store ipl device number
269
270#
271# load parameter file from ipl device
272# 13#
273.Lagain1: 14# startup-code at 0x10000, running in absolute addressing mode
274 l %r2,INITRD_START+4-PARMAREA(%r12)# use ramdisk location as temp
275 bas %r14,.Lloader # load parameter file
276 ltr %r2,%r2 # got anything ?
277 bz .Lnopf
278 chi %r2,895
279 bnh .Lnotrunc
280 la %r2,895
281.Lnotrunc:
282 l %r4,INITRD_START+4-PARMAREA(%r12)
283 clc 0(3,%r4),.L_hdr # if it is HDRx
284 bz .Lagain1 # skip dataset header
285 clc 0(3,%r4),.L_eof # if it is EOFx
286 bz .Lagain1 # skip dateset trailer
287 la %r5,0(%r4,%r2)
288 lr %r3,%r2
289.Lidebc:
290 tm 0(%r5),0x80 # high order bit set ?
291 bo .Ldocv # yes -> convert from EBCDIC
292 ahi %r5,-1
293 bct %r3,.Lidebc
294 b .Lnocv
295.Ldocv:
296 l %r3,.Lcvtab
297 tr 0(256,%r4),0(%r3) # convert parameters to ascii
298 tr 256(256,%r4),0(%r3)
299 tr 512(256,%r4),0(%r3)
300 tr 768(122,%r4),0(%r3)
301.Lnocv: la %r3,COMMAND_LINE-PARMAREA(%r12) # load adr. of command line
302 mvc 0(256,%r3),0(%r4)
303 mvc 256(256,%r3),256(%r4)
304 mvc 512(256,%r3),512(%r4)
305 mvc 768(122,%r3),768(%r4)
306 slr %r0,%r0
307 b .Lcntlp
308.Ldelspc:
309 ic %r0,0(%r2,%r3)
310 chi %r0,0x20 # is it a space ?
311 be .Lcntlp
312 ahi %r2,1
313 b .Leolp
314.Lcntlp:
315 brct %r2,.Ldelspc
316.Leolp:
317 slr %r0,%r0
318 stc %r0,0(%r2,%r3) # terminate buffer
319.Lnopf:
320
321#
322# load ramdisk from ipl device
323#
324.Lagain2:
325 l %r2,INITRD_START+4-PARMAREA(%r12)# load adr. of ramdisk
326 bas %r14,.Lloader # load ramdisk
327 st %r2,INITRD_SIZE+4-PARMAREA(%r12) # store size of ramdisk
328 ltr %r2,%r2
329 bnz .Lrdcont
330 st %r2,INITRD_START+4-PARMAREA(%r12)# no ramdisk found, null it
331.Lrdcont:
332 l %r2,INITRD_START+4-PARMAREA(%r12)
333 clc 0(3,%r2),.L_hdr # skip HDRx and EOFx
334 bz .Lagain2
335 clc 0(3,%r2),.L_eof
336 bz .Lagain2
337
338#ifdef CONFIG_IPL_VM
339#
340# reset files in VM reader
341#
342 stidp __LC_CPUID # store cpuid
343 tm __LC_CPUID,0xff # running VM ?
344 bno .Lnoreset
345 la %r2,.Lreset
346 lhi %r3,26
347 diag %r2,%r3,8
348 la %r5,.Lirb
349 stsch 0(%r5) # check if irq is pending
350 tm 30(%r5),0x0f # by verifying if any of the
351 bnz .Lwaitforirq # activity or status control
352 tm 31(%r5),0xff # bits is set in the schib
353 bz .Lnoreset
354.Lwaitforirq:
355 mvc 0x78(8),.Lrdrnewpsw # set up IO interrupt psw
356.Lwaitrdrirq:
357 lpsw .Lrdrwaitpsw
358.Lrdrint:
359 c %r1,0xb8 # compare subchannel number
360 bne .Lwaitrdrirq
361 la %r5,.Lirb
362 tsch 0(%r5)
363.Lnoreset:
364 b .Lnoload
365
366 .align 8
367.Lrdrnewpsw:
368 .long 0x00080000,0x80000000+.Lrdrint
369.Lrdrwaitpsw:
370 .long 0x020a0000,0x80000000+.Lrdrint
371#endif
372
373#
374# everything loaded, go for it
375#
376.Lnoload:
377 l %r1,.Lstartup
378 br %r1
379
380.Lstartup: .long startup
381.Lcvtab:.long _ebcasc # ebcdic to ascii table
382.Lreset:.byte 0xc3,0xc8,0xc1,0xd5,0xc7,0xc5,0x40,0xd9,0xc4,0xd9,0x40
383 .byte 0xc1,0xd3,0xd3,0x40,0xd2,0xc5,0xc5,0xd7,0x40,0xd5,0xd6
384 .byte 0xc8,0xd6,0xd3,0xc4 # "change rdr all keep nohold"
385.L_eof: .long 0xc5d6c600 /* C'EOF' */
386.L_hdr: .long 0xc8c4d900 /* C'HDR' */
387#endif /* CONFIG_IPL */
388
389#
390# SALIPL loader support. Based on a patch by Rob van der Heij.
391# This entry point is called directly from the SALIPL loader and
392# doesn't need a builtin ipl record.
393#
394 .org 0x800
395 .globl start
396start:
397 stm %r0,%r15,0x07b0 # store registers
398 basr %r12,%r0
399.base:
400 l %r11,.parm
401 l %r8,.cmd # pointer to command buffer
402
403 ltr %r9,%r9 # do we have SALIPL parameters?
404 bp .sk8x8
405
406 mvc 0(64,%r8),0x00b0 # copy saved registers
407 xc 64(240-64,%r8),0(%r8) # remainder of buffer
408 tr 0(64,%r8),.lowcase
409 b .gotr
410.sk8x8:
411 mvc 0(240,%r8),0(%r9) # copy iplparms into buffer
412.gotr:
413 l %r10,.tbl # EBCDIC to ASCII table
414 tr 0(240,%r8),0(%r10)
415 stidp __LC_CPUID # Are we running on VM maybe
416 cli __LC_CPUID,0xff
417 bnz .test
418 .long 0x83300060 # diag 3,0,x'0060' - storage size
419 b .done
420.test:
421 mvc 0x68(8),.pgmnw # set up pgm check handler
422 l %r2,.fourmeg
423 lr %r3,%r2
424 bctr %r3,%r0 # 4M-1
425.loop: iske %r0,%r3
426 ar %r3,%r2
427.pgmx:
428 sr %r3,%r2
429 la %r3,1(%r3)
430.done:
431 l %r1,.memsize
432 st %r3,4(%r1)
433 slr %r0,%r0
434 st %r0,INITRD_SIZE+4-PARMAREA(%r11)
435 st %r0,INITRD_START+4-PARMAREA(%r11)
436 j startup # continue with startup
437.tbl: .long _ebcasc # translate table
438.cmd: .long COMMAND_LINE # address of command line buffer
439.parm: .long PARMAREA
440.fourmeg: .long 0x00400000 # 4M
441.pgmnw: .long 0x00080000,.pgmx
442.memsize: .long memory_size
443.lowcase:
444 .byte 0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07
445 .byte 0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f
446 .byte 0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17
447 .byte 0x18,0x19,0x1a,0x1b,0x1c,0x1d,0x1e,0x1f
448 .byte 0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27
449 .byte 0x28,0x29,0x2a,0x2b,0x2c,0x2d,0x2e,0x2f
450 .byte 0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37
451 .byte 0x38,0x39,0x3a,0x3b,0x3c,0x3d,0x3e,0x3f
452 .byte 0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47
453 .byte 0x48,0x49,0x4a,0x4b,0x4c,0x4d,0x4e,0x4f
454 .byte 0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57
455 .byte 0x58,0x59,0x5a,0x5b,0x5c,0x5d,0x5e,0x5f
456 .byte 0x60,0x61,0x62,0x63,0x64,0x65,0x66,0x67
457 .byte 0x68,0x69,0x6a,0x6b,0x6c,0x6d,0x6e,0x6f
458 .byte 0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77
459 .byte 0x78,0x79,0x7a,0x7b,0x7c,0x7d,0x7e,0x7f
460
461 .byte 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87
462 .byte 0x88,0x89,0x8a,0x8b,0x8c,0x8d,0x8e,0x8f
463 .byte 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97
464 .byte 0x98,0x99,0x9a,0x9b,0x9c,0x9d,0x9e,0x9f
465 .byte 0xa0,0xa1,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7
466 .byte 0xa8,0xa9,0xaa,0xab,0xac,0xad,0xae,0xaf
467 .byte 0xb0,0xb1,0xb2,0xb3,0xb4,0xb5,0xb6,0xb7
468 .byte 0xb8,0xb9,0xba,0xbb,0xbc,0xbd,0xbe,0xbf
469 .byte 0xc0,0x81,0x82,0x83,0x84,0x85,0x86,0x87 # .abcdefg
470 .byte 0x88,0x89,0xca,0xcb,0xcc,0xcd,0xce,0xcf # hi
471 .byte 0xd0,0x91,0x92,0x93,0x94,0x95,0x96,0x97 # .jklmnop
472 .byte 0x98,0x99,0xda,0xdb,0xdc,0xdd,0xde,0xdf # qr
473 .byte 0xe0,0xe1,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7 # ..stuvwx
474 .byte 0xa8,0xa9,0xea,0xeb,0xec,0xed,0xee,0xef # yz
475 .byte 0xf0,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7
476 .byte 0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfe,0xff
477
478#
479# startup-code at 0x10000, running in real mode
480# this is called either by the ipl loader or directly by PSW restart 15# this is called either by the ipl loader or directly by PSW restart
481# or linload or SALIPL 16# or linload or SALIPL
482# 17#
@@ -750,62 +285,7 @@ _pstart:
750 .global _pend 285 .global _pend
751_pend: 286_pend:
752 287
753.Lget_ipl_device: 288 GET_IPL_DEVICE
754 basr %r12,0
755.LPG2: l %r1,0xb8 # get sid
756 sll %r1,15 # test if subchannel is enabled
757 srl %r1,31
758 ltr %r1,%r1
759 bz 0(%r14) # subchannel disabled
760 l %r1,0xb8
761 la %r5,.Lipl_schib-.LPG2(%r12)
762 stsch 0(%r5) # get schib of subchannel
763 bnz 0(%r14) # schib not available
764 tm 5(%r5),0x01 # devno valid?
765 bno 0(%r14)
766 la %r6,ipl_parameter_flags-.LPG2(%r12)
767 oi 3(%r6),0x01 # set flag
768 la %r2,ipl_devno-.LPG2(%r12)
769 mvc 0(2,%r2),6(%r5) # store devno
770 tm 4(%r5),0x80 # qdio capable device?
771 bno 0(%r14)
772 oi 3(%r6),0x02 # set flag
773
774 # copy ipl parameters
775
776 lhi %r0,4096
777 l %r2,20(%r0) # get address of parameter list
778 lhi %r3,IPL_PARMBLOCK_ORIGIN
779 st %r3,20(%r0)
780 lhi %r4,1
781 cr %r2,%r3 # start parameters < destination ?
782 jl 0f
783 lhi %r1,1 # copy direction is upwards
784 j 1f
7850: lhi %r1,-1 # copy direction is downwards
786 ar %r2,%r0
787 ar %r3,%r0
788 ar %r2,%r1
789 ar %r3,%r1
7901: mvc 0(1,%r3),0(%r2) # finally copy ipl parameters
791 ar %r3,%r1
792 ar %r2,%r1
793 sr %r0,%r4
794 jne 1b
795 b 0(%r14)
796
797 .align 4
798.Lipl_schib:
799 .rept 13
800 .long 0
801 .endr
802
803 .globl ipl_parameter_flags
804ipl_parameter_flags:
805 .long 0
806 .globl ipl_devno
807ipl_devno:
808 .word 0
809 289
810#ifdef CONFIG_SHARED_KERNEL 290#ifdef CONFIG_SHARED_KERNEL
811 .org 0x100000 291 .org 0x100000
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-23 00:15:57 -0500