From: Heiko Carstens <[email protected]>
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 <[email protected]>
Signed-off-by: Heiko Carstens <[email protected]>
---
Patch should be applied on top of the set of s390 patches
that Martin sent last Friday.
arch/s390/Makefile | 4
arch/s390/kernel/Makefile | 4
arch/s390/kernel/head.S | 382 ++------------------------------
arch/s390/kernel/head31.S | 336 ++++++++++++++++++++++++++++
arch/s390/kernel/head64.S | 538 ----------------------------------------------
5 files changed, 381 insertions(+), 883 deletions(-)
diff -urpN linux-2.6/arch/s390/kernel/head31.S linux-2.6-patched/arch/s390/kernel/head31.S
--- linux-2.6/arch/s390/kernel/head31.S 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6-patched/arch/s390/kernel/head31.S 2005-11-03 13:39:18.000000000 +0100
@@ -0,0 +1,336 @@
+/*
+ * arch/s390/kernel/head31.S
+ *
+ * (C) Copyright IBM Corp. 2005
+ *
+ * Author(s): Hartmut Penner <[email protected]>
+ * Martin Schwidefsky <[email protected]>
+ * Rob van der Heij <[email protected]>
+ * Heiko Carstens <[email protected]>
+ *
+ */
+
+#
+# startup-code at 0x10000, running in absolute addressing mode
+# this is called either by the ipl loader or directly by PSW restart
+# or linload or SALIPL
+#
+ .org 0x10000
+startup:basr %r13,0 # get base
+.LPG1: l %r1, .Lget_ipl_device_addr-.LPG1(%r13)
+ basr %r14, %r1
+ lctl %c0,%c15,.Lctl-.LPG1(%r13) # load control registers
+ la %r12,_pstart-.LPG1(%r13) # pointer to parameter area
+ # move IPL device to lowcore
+ mvc __LC_IPLDEV(4),IPL_DEVICE-PARMAREA(%r12)
+
+#
+# clear bss memory
+#
+ l %r2,.Lbss_bgn-.LPG1(%r13) # start of bss
+ l %r3,.Lbss_end-.LPG1(%r13) # end of bss
+ sr %r3,%r2 # length of bss
+ sr %r4,%r4
+ sr %r5,%r5 # set src,length and pad to zero
+ sr %r0,%r0
+ mvcle %r2,%r4,0 # clear mem
+ jo .-4 # branch back, if not finish
+
+ l %r2,.Lrcp-.LPG1(%r13) # Read SCP forced command word
+.Lservicecall:
+ stosm .Lpmask-.LPG1(%r13),0x01 # authorize ext interrupts
+
+ stctl %r0, %r0,.Lcr-.LPG1(%r13) # get cr0
+ la %r1,0x200 # set bit 22
+ o %r1,.Lcr-.LPG1(%r13) # or old cr0 with r1
+ st %r1,.Lcr-.LPG1(%r13)
+ lctl %r0, %r0,.Lcr-.LPG1(%r13) # load modified cr0
+
+ mvc __LC_EXT_NEW_PSW(8),.Lpcext-.LPG1(%r13) # set postcall psw
+ la %r1, .Lsclph-.LPG1(%r13)
+ a %r1,__LC_EXT_NEW_PSW+4 # set handler
+ st %r1,__LC_EXT_NEW_PSW+4
+
+ la %r4,_pstart-.LPG1(%r13) # %r4 is our index for sccb stuff
+ la %r1, .Lsccb-PARMAREA(%r4) # our sccb
+ .insn rre,0xb2200000,%r2,%r1 # service call
+ ipm %r1
+ srl %r1,28 # get cc code
+ xr %r3, %r3
+ chi %r1,3
+ be .Lfchunk-.LPG1(%r13) # leave
+ chi %r1,2
+ be .Lservicecall-.LPG1(%r13)
+ lpsw .Lwaitsclp-.LPG1(%r13)
+.Lsclph:
+ lh %r1,.Lsccbr-PARMAREA(%r4)
+ chi %r1,0x10 # 0x0010 is the sucess code
+ je .Lprocsccb # let's process the sccb
+ chi %r1,0x1f0
+ bne .Lfchunk-.LPG1(%r13) # unhandled error code
+ c %r2, .Lrcp-.LPG1(%r13) # Did we try Read SCP forced
+ bne .Lfchunk-.LPG1(%r13) # if no, give up
+ l %r2, .Lrcp2-.LPG1(%r13) # try with Read SCP
+ b .Lservicecall-.LPG1(%r13)
+.Lprocsccb:
+ lhi %r1,0
+ icm %r1,3,.Lscpincr1-PARMAREA(%r4) # use this one if != 0
+ jnz .Lscnd
+ lhi %r1,0x800 # otherwise report 2GB
+.Lscnd:
+ lhi %r3,0x800 # limit reported memory size to 2GB
+ cr %r1,%r3
+ jl .Lno2gb
+ lr %r1,%r3
+.Lno2gb:
+ xr %r3,%r3 # same logic
+ ic %r3,.Lscpa1-PARMAREA(%r4)
+ chi %r3,0x00
+ jne .Lcompmem
+ l %r3,.Lscpa2-PARMAREA(%r13)
+.Lcompmem:
+ mr %r2,%r1 # mem in MB on 128-bit
+ l %r1,.Lonemb-.LPG1(%r13)
+ mr %r2,%r1 # mem size in bytes in %r3
+ b .Lfchunk-.LPG1(%r13)
+
+ .align 4
+.Lget_ipl_device_addr:
+ .long .Lget_ipl_device
+.Lpmask:
+ .byte 0
+.align 8
+.Lpcext:.long 0x00080000,0x80000000
+.Lcr:
+ .long 0x00 # place holder for cr0
+.Lwaitsclp:
+ .long 0x010a0000,0x80000000 + .Lsclph
+.Lrcp:
+ .int 0x00120001 # Read SCP forced code
+.Lrcp2:
+ .int 0x00020001 # Read SCP code
+.Lonemb:
+ .int 0x100000
+.Lfchunk:
+
+#
+# find memory chunks.
+#
+ lr %r9,%r3 # end of mem
+ mvc __LC_PGM_NEW_PSW(8),.Lpcmem-.LPG1(%r13)
+ la %r1,1 # test in increments of 128KB
+ sll %r1,17
+ l %r3,.Lmchunk-.LPG1(%r13) # get pointer to memory_chunk array
+ slr %r4,%r4 # set start of chunk to zero
+ slr %r5,%r5 # set end of chunk to zero
+ slr %r6,%r6 # set access code to zero
+ la %r10, MEMORY_CHUNKS # number of chunks
+.Lloop:
+ tprot 0(%r5),0 # test protection of first byte
+ ipm %r7
+ srl %r7,28
+ clr %r6,%r7 # compare cc with last access code
+ be .Lsame-.LPG1(%r13)
+ b .Lchkmem-.LPG1(%r13)
+.Lsame:
+ ar %r5,%r1 # add 128KB to end of chunk
+ bno .Lloop-.LPG1(%r13) # r1 < 0x80000000 -> loop
+.Lchkmem: # > 2GB or tprot got a program check
+ clr %r4,%r5 # chunk size > 0?
+ be .Lchkloop-.LPG1(%r13)
+ st %r4,0(%r3) # store start address of chunk
+ lr %r0,%r5
+ slr %r0,%r4
+ st %r0,4(%r3) # store size of chunk
+ st %r6,8(%r3) # store type of chunk
+ la %r3,12(%r3)
+ l %r4,.Lmemsize-.LPG1(%r13) # address of variable memory_size
+ st %r5,0(%r4) # store last end to memory size
+ ahi %r10,-1 # update chunk number
+.Lchkloop:
+ lr %r6,%r7 # set access code to last cc
+ # we got an exception or we're starting a new
+ # chunk , we must check if we should
+ # still try to find valid memory (if we detected
+ # the amount of available storage), and if we
+ # have chunks left
+ xr %r0,%r0
+ clr %r0,%r9 # did we detect memory?
+ je .Ldonemem # if not, leave
+ chi %r10,0 # do we have chunks left?
+ je .Ldonemem
+ alr %r5,%r1 # add 128KB to end of chunk
+ lr %r4,%r5 # potential new chunk
+ clr %r5,%r9 # should we go on?
+ jl .Lloop
+.Ldonemem:
+ l %r12,.Lmflags-.LPG1(%r13) # get address of machine_flags
+#
+# find out if we are running under VM
+#
+ stidp __LC_CPUID # store cpuid
+ tm __LC_CPUID,0xff # running under VM ?
+ bno .Lnovm-.LPG1(%r13)
+ oi 3(%r12),1 # set VM flag
+.Lnovm:
+ lh %r0,__LC_CPUID+4 # get cpu version
+ chi %r0,0x7490 # running on a P/390 ?
+ bne .Lnop390-.LPG1(%r13)
+ oi 3(%r12),4 # set P/390 flag
+.Lnop390:
+
+#
+# find out if we have an IEEE fpu
+#
+ mvc __LC_PGM_NEW_PSW(8),.Lpcfpu-.LPG1(%r13)
+ efpc %r0,0 # test IEEE extract fpc instruction
+ oi 3(%r12),2 # set IEEE fpu flag
+.Lchkfpu:
+
+#
+# find out if we have the CSP instruction
+#
+ mvc __LC_PGM_NEW_PSW(8),.Lpccsp-.LPG1(%r13)
+ la %r0,0
+ lr %r1,%r0
+ la %r2,4
+ csp %r0,%r2 # Test CSP instruction
+ oi 3(%r12),8 # set CSP flag
+.Lchkcsp:
+
+#
+# find out if we have the MVPG instruction
+#
+ mvc __LC_PGM_NEW_PSW(8),.Lpcmvpg-.LPG1(%r13)
+ sr %r0,%r0
+ la %r1,0
+ la %r2,0
+ mvpg %r1,%r2 # Test CSP instruction
+ oi 3(%r12),16 # set MVPG flag
+.Lchkmvpg:
+
+#
+# find out if we have the IDTE instruction
+#
+ mvc __LC_PGM_NEW_PSW(8),.Lpcidte-.LPG1(%r13)
+ .long 0xb2b10000 # store facility list
+ tm 0xc8,0x08 # check bit for clearing-by-ASCE
+ bno .Lchkidte-.LPG1(%r13)
+ lhi %r1,2094
+ lhi %r2,0
+ .long 0xb98e2001
+ oi 3(%r12),0x80 # set IDTE flag
+.Lchkidte:
+
+ lpsw .Lentry-.LPG1(13) # jump to _stext in primary-space,
+ # virtual and never return ...
+ .align 8
+.Lentry:.long 0x00080000,0x80000000 + _stext
+.Lctl: .long 0x04b50002 # cr0: various things
+ .long 0 # cr1: primary space segment table
+ .long .Lduct # cr2: dispatchable unit control table
+ .long 0 # cr3: instruction authorization
+ .long 0 # cr4: instruction authorization
+ .long 0xffffffff # cr5: primary-aste origin
+ .long 0 # cr6: I/O interrupts
+ .long 0 # cr7: secondary space segment table
+ .long 0 # cr8: access registers translation
+ .long 0 # cr9: tracing off
+ .long 0 # cr10: tracing off
+ .long 0 # cr11: tracing off
+ .long 0 # cr12: tracing off
+ .long 0 # cr13: home space segment table
+ .long 0xc0000000 # cr14: machine check handling off
+ .long 0 # cr15: linkage stack operations
+.Lpcmem:.long 0x00080000,0x80000000 + .Lchkmem
+.Lpcfpu:.long 0x00080000,0x80000000 + .Lchkfpu
+.Lpccsp:.long 0x00080000,0x80000000 + .Lchkcsp
+.Lpcmvpg:.long 0x00080000,0x80000000 + .Lchkmvpg
+.Lpcidte:.long 0x00080000,0x80000000 + .Lchkidte
+.Lmemsize:.long memory_size
+.Lmchunk:.long memory_chunk
+.Lmflags:.long machine_flags
+.Lbss_bgn: .long __bss_start
+.Lbss_end: .long _end
+
+ .org PARMAREA-64
+.Lduct: .long 0,0,0,0,0,0,0,0
+ .long 0,0,0,0,0,0,0,0
+
+#
+# params at 10400 (setup.h)
+#
+ .org PARMAREA
+ .global _pstart
+_pstart:
+ .long 0,0 # IPL_DEVICE
+ .long 0,RAMDISK_ORIGIN # INITRD_START
+ .long 0,RAMDISK_SIZE # INITRD_SIZE
+
+ .org COMMAND_LINE
+ .byte "root=/dev/ram0 ro"
+ .byte 0
+ .org 0x11000
+.Lsccb:
+ .hword 0x1000 # length, one page
+ .byte 0x00,0x00,0x00
+ .byte 0x80 # variable response bit set
+.Lsccbr:
+ .hword 0x00 # response code
+.Lscpincr1:
+ .hword 0x00
+.Lscpa1:
+ .byte 0x00
+ .fill 89,1,0
+.Lscpa2:
+ .int 0x00
+.Lscpincr2:
+ .quad 0x00
+ .fill 3984,1,0
+ .org 0x12000
+ .global _pend
+_pend:
+
+ GET_IPL_DEVICE
+
+#ifdef CONFIG_SHARED_KERNEL
+ .org 0x100000
+#endif
+
+#
+# startup-code, running in virtual mode
+#
+ .globl _stext
+_stext: basr %r13,0 # get base
+.LPG3:
+#
+# Setup stack
+#
+ l %r15,.Linittu-.LPG3(%r13)
+ mvc __LC_CURRENT(4),__TI_task(%r15)
+ ahi %r15,1<<(PAGE_SHIFT+THREAD_ORDER) # init_task_union+THREAD_SIZE
+ st %r15,__LC_KERNEL_STACK # set end of kernel stack
+ ahi %r15,-96
+ xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15) # clear backchain
+
+# check control registers
+ stctl %c0,%c15,0(%r15)
+ oi 2(%r15),0x40 # enable sigp emergency signal
+ oi 0(%r15),0x10 # switch on low address protection
+ lctl %c0,%c15,0(%r15)
+
+#
+ lam 0,15,.Laregs-.LPG3(%r13) # load access regs needed by uaccess
+ l %r14,.Lstart-.LPG3(%r13)
+ basr %r14,%r14 # call start_kernel
+#
+# We returned from start_kernel ?!? PANIK
+#
+ basr %r13,0
+ lpsw .Ldw-.(%r13) # load disabled wait psw
+#
+ .align 8
+.Ldw: .long 0x000a0000,0x00000000
+.Linittu:.long init_thread_union
+.Lstart:.long start_kernel
+.Laregs:.long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
diff -urpN linux-2.6/arch/s390/kernel/head64.S linux-2.6-patched/arch/s390/kernel/head64.S
--- linux-2.6/arch/s390/kernel/head64.S 2005-11-03 13:39:09.000000000 +0100
+++ linux-2.6-patched/arch/s390/kernel/head64.S 2005-11-03 13:39:18.000000000 +0100
@@ -1,482 +1,17 @@
/*
- * arch/s390/kernel/head.S
+ * arch/s390/kernel/head64.S
*
- * S390 version
- * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
- * Author(s): Hartmut Penner ([email protected]),
- * Martin Schwidefsky ([email protected]),
- * Rob van der Heij ([email protected])
+ * (C) Copyright IBM Corp. 1999,2005
+ *
+ * Author(s): Hartmut Penner <[email protected]>
+ * Martin Schwidefsky <[email protected]>
+ * Rob van der Heij <[email protected]>
+ * Heiko Carstens <[email protected]>
*
- * There are 5 different IPL methods
- * 1) load the image directly into ram at address 0 and do an PSW restart
- * 2) linload will load the image from address 0x10000 to memory 0x10000
- * and start the code thru LPSW 0x0008000080010000 (VM only, deprecated)
- * 3) generate the tape ipl header, store the generated image on a tape
- * and ipl from it
- * In case of SL tape you need to IPL 5 times to get past VOL1 etc
- * 4) generate the vm reader ipl header, move the generated image to the
- * VM reader (use option NOH!) and do a ipl from reader (VM only)
- * 5) direct call of start by the SALIPL loader
- * We use the cpuid to distinguish between VM and native ipl
- * params for kernel are pushed to 0x10400 (see setup.h)
-
- Changes:
- Okt 25 2000 <[email protected]>
- added code to skip HDR and EOF to allow SL tape IPL (5 retries)
- changed first CCW from rewind to backspace block
-
*/
-#include <linux/config.h>
-#include <asm/setup.h>
-#include <asm/lowcore.h>
-#include <asm/asm-offsets.h>
-#include <asm/thread_info.h>
-#include <asm/page.h>
-
-#ifndef CONFIG_IPL
- .org 0
- .long 0x00080000,0x80000000+startup # Just a restart PSW
-#else
-#ifdef CONFIG_IPL_TAPE
-#define IPL_BS 1024
- .org 0
- .long 0x00080000,0x80000000+iplstart # The first 24 bytes are loaded
- .long 0x27000000,0x60000001 # by ipl to addresses 0-23.
- .long 0x02000000,0x20000000+IPL_BS # (a PSW and two CCWs).
- .long 0x00000000,0x00000000 # external old psw
- .long 0x00000000,0x00000000 # svc old psw
- .long 0x00000000,0x00000000 # program check old psw
- .long 0x00000000,0x00000000 # machine check old psw
- .long 0x00000000,0x00000000 # io old psw
- .long 0x00000000,0x00000000
- .long 0x00000000,0x00000000
- .long 0x00000000,0x00000000
- .long 0x000a0000,0x00000058 # external new psw
- .long 0x000a0000,0x00000060 # svc new psw
- .long 0x000a0000,0x00000068 # program check new psw
- .long 0x000a0000,0x00000070 # machine check new psw
- .long 0x00080000,0x80000000+.Lioint # io new psw
-
- .org 0x100
-#
-# subroutine for loading from tape
-# Paramters:
-# R1 = device number
-# R2 = load address
-.Lloader:
- st %r14,.Lldret
- la %r3,.Lorbread # r3 = address of orb
- la %r5,.Lirb # r5 = address of irb
- st %r2,.Lccwread+4 # initialize CCW data addresses
- lctl %c6,%c6,.Lcr6
- slr %r2,%r2
-.Lldlp:
- la %r6,3 # 3 retries
-.Lssch:
- ssch 0(%r3) # load chunk of IPL_BS bytes
- bnz .Llderr
-.Lw4end:
- bas %r14,.Lwait4io
- tm 8(%r5),0x82 # do we have a problem ?
- bnz .Lrecov
- slr %r7,%r7
- icm %r7,3,10(%r5) # get residual count
- lcr %r7,%r7
- la %r7,IPL_BS(%r7) # IPL_BS-residual=#bytes read
- ar %r2,%r7 # add to total size
- tm 8(%r5),0x01 # found a tape mark ?
- bnz .Ldone
- l %r0,.Lccwread+4 # update CCW data addresses
- ar %r0,%r7
- st %r0,.Lccwread+4
- b .Lldlp
-.Ldone:
- l %r14,.Lldret
- br %r14 # r2 contains the total size
-.Lrecov:
- bas %r14,.Lsense # do the sensing
- bct %r6,.Lssch # dec. retry count & branch
- b .Llderr
-#
-# Sense subroutine
-#
-.Lsense:
- st %r14,.Lsnsret
- la %r7,.Lorbsense
- ssch 0(%r7) # start sense command
- bnz .Llderr
- bas %r14,.Lwait4io
- l %r14,.Lsnsret
- tm 8(%r5),0x82 # do we have a problem ?
- bnz .Llderr
- br %r14
-#
-# Wait for interrupt subroutine
-#
-.Lwait4io:
- lpsw .Lwaitpsw
-.Lioint:
- c %r1,0xb8 # compare subchannel number
- bne .Lwait4io
- tsch 0(%r5)
- slr %r0,%r0
- tm 8(%r5),0x82 # do we have a problem ?
- bnz .Lwtexit
- tm 8(%r5),0x04 # got device end ?
- bz .Lwait4io
-.Lwtexit:
- br %r14
-.Llderr:
- lpsw .Lcrash
-
- .align 8
-.Lorbread:
- .long 0x00000000,0x0080ff00,.Lccwread
- .align 8
-.Lorbsense:
- .long 0x00000000,0x0080ff00,.Lccwsense
- .align 8
-.Lccwread:
- .long 0x02200000+IPL_BS,0x00000000
-.Lccwsense:
- .long 0x04200001,0x00000000
-.Lwaitpsw:
- .long 0x020a0000,0x80000000+.Lioint
-
-.Lirb: .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
-.Lcr6: .long 0xff000000
- .align 8
-.Lcrash:.long 0x000a0000,0x00000000
-.Lldret:.long 0
-.Lsnsret: .long 0
-#endif /* CONFIG_IPL_TAPE */
-
-#ifdef CONFIG_IPL_VM
-#define IPL_BS 0x730
- .org 0
- .long 0x00080000,0x80000000+iplstart # The first 24 bytes are loaded
- .long 0x02000018,0x60000050 # by ipl to addresses 0-23.
- .long 0x02000068,0x60000050 # (a PSW and two CCWs).
- .fill 80-24,1,0x40 # bytes 24-79 are discarded !!
- .long 0x020000f0,0x60000050 # The next 160 byte are loaded
- .long 0x02000140,0x60000050 # to addresses 0x18-0xb7
- .long 0x02000190,0x60000050 # They form the continuation
- .long 0x020001e0,0x60000050 # of the CCW program started
- .long 0x02000230,0x60000050 # by ipl and load the range
- .long 0x02000280,0x60000050 # 0x0f0-0x730 from the image
- .long 0x020002d0,0x60000050 # to the range 0x0f0-0x730
- .long 0x02000320,0x60000050 # in memory. At the end of
- .long 0x02000370,0x60000050 # the channel program the PSW
- .long 0x020003c0,0x60000050 # at location 0 is loaded.
- .long 0x02000410,0x60000050 # Initial processing starts
- .long 0x02000460,0x60000050 # at 0xf0 = iplstart.
- .long 0x020004b0,0x60000050
- .long 0x02000500,0x60000050
- .long 0x02000550,0x60000050
- .long 0x020005a0,0x60000050
- .long 0x020005f0,0x60000050
- .long 0x02000640,0x60000050
- .long 0x02000690,0x60000050
- .long 0x020006e0,0x20000050
-
- .org 0xf0
-#
-# subroutine for loading cards from the reader
-#
-.Lloader:
- la %r3,.Lorb # r2 = address of orb into r2
- la %r5,.Lirb # r4 = address of irb
- la %r6,.Lccws
- la %r7,20
-.Linit:
- st %r2,4(%r6) # initialize CCW data addresses
- la %r2,0x50(%r2)
- la %r6,8(%r6)
- bct 7,.Linit
-
- lctl %c6,%c6,.Lcr6 # set IO subclass mask
- slr %r2,%r2
-.Lldlp:
- ssch 0(%r3) # load chunk of 1600 bytes
- bnz .Llderr
-.Lwait4irq:
- mvc 0x78(8),.Lnewpsw # set up IO interrupt psw
- lpsw .Lwaitpsw
-.Lioint:
- c %r1,0xb8 # compare subchannel number
- bne .Lwait4irq
- tsch 0(%r5)
-
- slr %r0,%r0
- ic %r0,8(%r5) # get device status
- chi %r0,8 # channel end ?
- be .Lcont
- chi %r0,12 # channel end + device end ?
- be .Lcont
-
- l %r0,4(%r5)
- s %r0,8(%r3) # r0/8 = number of ccws executed
- mhi %r0,10 # *10 = number of bytes in ccws
- lh %r3,10(%r5) # get residual count
- sr %r0,%r3 # #ccws*80-residual=#bytes read
- ar %r2,%r0
-
- br %r14 # r2 contains the total size
-
-.Lcont:
- ahi %r2,0x640 # add 0x640 to total size
- la %r6,.Lccws
- la %r7,20
-.Lincr:
- l %r0,4(%r6) # update CCW data addresses
- ahi %r0,0x640
- st %r0,4(%r6)
- ahi %r6,8
- bct 7,.Lincr
-
- b .Lldlp
-.Llderr:
- lpsw .Lcrash
-
- .align 8
-.Lorb: .long 0x00000000,0x0080ff00,.Lccws
-.Lirb: .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
-.Lcr6: .long 0xff000000
-.Lloadp:.long 0,0
- .align 8
-.Lcrash:.long 0x000a0000,0x00000000
-.Lnewpsw:
- .long 0x00080000,0x80000000+.Lioint
-.Lwaitpsw:
- .long 0x020a0000,0x80000000+.Lioint
-
- .align 8
-.Lccws: .rept 19
- .long 0x02600050,0x00000000
- .endr
- .long 0x02200050,0x00000000
-#endif /* CONFIG_IPL_VM */
-
-iplstart:
- lh %r1,0xb8 # test if subchannel number
- bct %r1,.Lnoload # is valid
- l %r1,0xb8 # load ipl subchannel number
- la %r2,IPL_BS # load start address
- bas %r14,.Lloader # load rest of ipl image
- larl %r12,_pstart # pointer to parameter area
- st %r1,IPL_DEVICE+4-PARMAREA(%r12) # store ipl device number
-
-#
-# load parameter file from ipl device
-#
-.Lagain1:
- l %r2,INITRD_START+4-PARMAREA(%r12)# use ramdisk location as temp
- bas %r14,.Lloader # load parameter file
- ltr %r2,%r2 # got anything ?
- bz .Lnopf
- chi %r2,895
- bnh .Lnotrunc
- la %r2,895
-.Lnotrunc:
- l %r4,INITRD_START+4-PARMAREA(%r12)
- clc 0(3,%r4),.L_hdr # if it is HDRx
- bz .Lagain1 # skip dataset header
- clc 0(3,%r4),.L_eof # if it is EOFx
- bz .Lagain1 # skip dateset trailer
- la %r5,0(%r4,%r2)
- lr %r3,%r2
-.Lidebc:
- tm 0(%r5),0x80 # high order bit set ?
- bo .Ldocv # yes -> convert from EBCDIC
- ahi %r5,-1
- bct %r3,.Lidebc
- b .Lnocv
-.Ldocv:
- l %r3,.Lcvtab
- tr 0(256,%r4),0(%r3) # convert parameters to ascii
- tr 256(256,%r4),0(%r3)
- tr 512(256,%r4),0(%r3)
- tr 768(122,%r4),0(%r3)
-.Lnocv: la %r3,COMMAND_LINE-PARMAREA(%r12) # load adr. of command line
- mvc 0(256,%r3),0(%r4)
- mvc 256(256,%r3),256(%r4)
- mvc 512(256,%r3),512(%r4)
- mvc 768(122,%r3),768(%r4)
- slr %r0,%r0
- b .Lcntlp
-.Ldelspc:
- ic %r0,0(%r2,%r3)
- chi %r0,0x20 # is it a space ?
- be .Lcntlp
- ahi %r2,1
- b .Leolp
-.Lcntlp:
- brct %r2,.Ldelspc
-.Leolp:
- slr %r0,%r0
- stc %r0,0(%r2,%r3) # terminate buffer
-.Lnopf:
-
-#
-# load ramdisk from ipl device
-#
-.Lagain2:
- l %r2,INITRD_START+4-PARMAREA(%r12)# load adr. of ramdisk
- bas %r14,.Lloader # load ramdisk
- st %r2,INITRD_SIZE+4-PARMAREA(%r12) # store size of ramdisk
- ltr %r2,%r2
- bnz .Lrdcont
- st %r2,INITRD_START+4-PARMAREA(%r12)# no ramdisk found, null it
-.Lrdcont:
- l %r2,INITRD_START+4-PARMAREA(%r12)
- clc 0(3,%r2),.L_hdr # skip HDRx and EOFx
- bz .Lagain2
- clc 0(3,%r2),.L_eof
- bz .Lagain2
-
-#ifdef CONFIG_IPL_VM
-#
-# reset files in VM reader
-#
- stidp __LC_CPUID # store cpuid
- tm __LC_CPUID,0xff # running VM ?
- bno .Lnoreset
- la %r2,.Lreset
- lhi %r3,26
- diag %r2,%r3,8
- la %r5,.Lirb
- stsch 0(%r5) # check if irq is pending
- tm 30(%r5),0x0f # by verifying if any of the
- bnz .Lwaitforirq # activity or status control
- tm 31(%r5),0xff # bits is set in the schib
- bz .Lnoreset
-.Lwaitforirq:
- mvc 0x78(8),.Lrdrnewpsw # set up IO interrupt psw
-.Lwaitrdrirq:
- lpsw .Lrdrwaitpsw
-.Lrdrint:
- c %r1,0xb8 # compare subchannel number
- bne .Lwaitrdrirq
- la %r5,.Lirb
- tsch 0(%r5)
-.Lnoreset:
- b .Lnoload
-
- .align 8
-.Lrdrnewpsw:
- .long 0x00080000,0x80000000+.Lrdrint
-.Lrdrwaitpsw:
- .long 0x020a0000,0x80000000+.Lrdrint
-#endif
-
-#
-# everything loaded, go for it
-#
-.Lnoload:
- l %r1,.Lstartup
- br %r1
-
-.Lstartup: .long startup
-.Lcvtab:.long _ebcasc # ebcdic to ascii table
-.Lreset:.byte 0xc3,0xc8,0xc1,0xd5,0xc7,0xc5,0x40,0xd9,0xc4,0xd9,0x40
- .byte 0xc1,0xd3,0xd3,0x40,0xd2,0xc5,0xc5,0xd7,0x40,0xd5,0xd6
- .byte 0xc8,0xd6,0xd3,0xc4 # "change rdr all keep nohold"
-.L_eof: .long 0xc5d6c600 /* C'EOF' */
-.L_hdr: .long 0xc8c4d900 /* C'HDR' */
-#endif /* CONFIG_IPL */
-
-#
-# SALIPL loader support. Based on a patch by Rob van der Heij.
-# This entry point is called directly from the SALIPL loader and
-# doesn't need a builtin ipl record.
-#
- .org 0x800
- .globl start
-start:
- stm %r0,%r15,0x07b0 # store registers
- basr %r12,%r0
-.base:
- l %r11,.parm
- l %r8,.cmd # pointer to command buffer
-
- ltr %r9,%r9 # do we have SALIPL parameters?
- bp .sk8x8
-
- mvc 0(64,%r8),0x00b0 # copy saved registers
- xc 64(240-64,%r8),0(%r8) # remainder of buffer
- tr 0(64,%r8),.lowcase
- b .gotr
-.sk8x8:
- mvc 0(240,%r8),0(%r9) # copy iplparms into buffer
-.gotr:
- l %r10,.tbl # EBCDIC to ASCII table
- tr 0(240,%r8),0(%r10)
- stidp __LC_CPUID # Are we running on VM maybe
- cli __LC_CPUID,0xff
- bnz .test
- .long 0x83300060 # diag 3,0,x'0060' - storage size
- b .done
-.test:
- mvc 0x68(8),.pgmnw # set up pgm check handler
- l %r2,.fourmeg
- lr %r3,%r2
- bctr %r3,%r0 # 4M-1
-.loop: iske %r0,%r3
- ar %r3,%r2
-.pgmx:
- sr %r3,%r2
- la %r3,1(%r3)
-.done:
- l %r1,.memsize
- st %r3,4(%r1)
- slr %r0,%r0
- st %r0,INITRD_SIZE+4-PARMAREA(%r11)
- st %r0,INITRD_START+4-PARMAREA(%r11)
- j startup # continue with startup
-.tbl: .long _ebcasc # translate table
-.cmd: .long COMMAND_LINE # address of command line buffer
-.parm: .long PARMAREA
-.fourmeg: .long 0x00400000 # 4M
-.pgmnw: .long 0x00080000,.pgmx
-.memsize: .long memory_size
-.lowcase:
- .byte 0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07
- .byte 0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f
- .byte 0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17
- .byte 0x18,0x19,0x1a,0x1b,0x1c,0x1d,0x1e,0x1f
- .byte 0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27
- .byte 0x28,0x29,0x2a,0x2b,0x2c,0x2d,0x2e,0x2f
- .byte 0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37
- .byte 0x38,0x39,0x3a,0x3b,0x3c,0x3d,0x3e,0x3f
- .byte 0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47
- .byte 0x48,0x49,0x4a,0x4b,0x4c,0x4d,0x4e,0x4f
- .byte 0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57
- .byte 0x58,0x59,0x5a,0x5b,0x5c,0x5d,0x5e,0x5f
- .byte 0x60,0x61,0x62,0x63,0x64,0x65,0x66,0x67
- .byte 0x68,0x69,0x6a,0x6b,0x6c,0x6d,0x6e,0x6f
- .byte 0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77
- .byte 0x78,0x79,0x7a,0x7b,0x7c,0x7d,0x7e,0x7f
-
- .byte 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87
- .byte 0x88,0x89,0x8a,0x8b,0x8c,0x8d,0x8e,0x8f
- .byte 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97
- .byte 0x98,0x99,0x9a,0x9b,0x9c,0x9d,0x9e,0x9f
- .byte 0xa0,0xa1,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7
- .byte 0xa8,0xa9,0xaa,0xab,0xac,0xad,0xae,0xaf
- .byte 0xb0,0xb1,0xb2,0xb3,0xb4,0xb5,0xb6,0xb7
- .byte 0xb8,0xb9,0xba,0xbb,0xbc,0xbd,0xbe,0xbf
- .byte 0xc0,0x81,0x82,0x83,0x84,0x85,0x86,0x87 # .abcdefg
- .byte 0x88,0x89,0xca,0xcb,0xcc,0xcd,0xce,0xcf # hi
- .byte 0xd0,0x91,0x92,0x93,0x94,0x95,0x96,0x97 # .jklmnop
- .byte 0x98,0x99,0xda,0xdb,0xdc,0xdd,0xde,0xdf # qr
- .byte 0xe0,0xe1,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7 # ..stuvwx
- .byte 0xa8,0xa9,0xea,0xeb,0xec,0xed,0xee,0xef # yz
- .byte 0xf0,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7
- .byte 0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfe,0xff
-
#
-# startup-code at 0x10000, running in real mode
+# startup-code at 0x10000, running in absolute addressing mode
# this is called either by the ipl loader or directly by PSW restart
# or linload or SALIPL
#
@@ -750,62 +285,7 @@ _pstart:
.global _pend
_pend:
-.Lget_ipl_device:
- basr %r12,0
-.LPG2: l %r1,0xb8 # get sid
- sll %r1,15 # test if subchannel is enabled
- srl %r1,31
- ltr %r1,%r1
- bz 0(%r14) # subchannel disabled
- l %r1,0xb8
- la %r5,.Lipl_schib-.LPG2(%r12)
- stsch 0(%r5) # get schib of subchannel
- bnz 0(%r14) # schib not available
- tm 5(%r5),0x01 # devno valid?
- bno 0(%r14)
- la %r6,ipl_parameter_flags-.LPG2(%r12)
- oi 3(%r6),0x01 # set flag
- la %r2,ipl_devno-.LPG2(%r12)
- mvc 0(2,%r2),6(%r5) # store devno
- tm 4(%r5),0x80 # qdio capable device?
- bno 0(%r14)
- oi 3(%r6),0x02 # set flag
-
- # copy ipl parameters
-
- lhi %r0,4096
- l %r2,20(%r0) # get address of parameter list
- lhi %r3,IPL_PARMBLOCK_ORIGIN
- st %r3,20(%r0)
- lhi %r4,1
- cr %r2,%r3 # start parameters < destination ?
- jl 0f
- lhi %r1,1 # copy direction is upwards
- j 1f
-0: lhi %r1,-1 # copy direction is downwards
- ar %r2,%r0
- ar %r3,%r0
- ar %r2,%r1
- ar %r3,%r1
-1: mvc 0(1,%r3),0(%r2) # finally copy ipl parameters
- ar %r3,%r1
- ar %r2,%r1
- sr %r0,%r4
- jne 1b
- b 0(%r14)
-
- .align 4
-.Lipl_schib:
- .rept 13
- .long 0
- .endr
-
- .globl ipl_parameter_flags
-ipl_parameter_flags:
- .long 0
- .globl ipl_devno
-ipl_devno:
- .word 0
+ GET_IPL_DEVICE
#ifdef CONFIG_SHARED_KERNEL
.org 0x100000
diff -urpN linux-2.6/arch/s390/kernel/head.S linux-2.6-patched/arch/s390/kernel/head.S
--- linux-2.6/arch/s390/kernel/head.S 2005-11-03 13:39:09.000000000 +0100
+++ linux-2.6-patched/arch/s390/kernel/head.S 2005-11-03 13:39:18.000000000 +0100
@@ -1,11 +1,12 @@
/*
* arch/s390/kernel/head.S
*
- * S390 version
- * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
- * Author(s): Hartmut Penner ([email protected]),
- * Martin Schwidefsky ([email protected]),
- * Rob van der Heij ([email protected])
+ * (C) Copyright IBM Corp. 1999, 2005
+ *
+ * Author(s): Hartmut Penner <[email protected]>
+ * Martin Schwidefsky <[email protected]>
+ * Rob van der Heij <[email protected]>
+ * Heiko Carstens <[email protected]>
*
* There are 5 different IPL methods
* 1) load the image directly into ram at address 0 and do an PSW restart
@@ -19,12 +20,7 @@
* 5) direct call of start by the SALIPL loader
* We use the cpuid to distinguish between VM and native ipl
* params for kernel are pushed to 0x10400 (see setup.h)
-
- Changes:
- Okt 25 2000 <[email protected]>
- added code to skip HDR and EOF to allow SL tape IPL (5 retries)
- changed first CCW from rewind to backspace block
-
+ *
*/
#include <linux/config.h>
@@ -34,6 +30,12 @@
#include <asm/thread_info.h>
#include <asm/page.h>
+#ifdef CONFIG_ARCH_S390X
+#define ARCH_OFFSET 4
+#else
+#define ARCH_OFFSET 0
+#endif
+
#ifndef CONFIG_IPL
.org 0
.long 0x00080000,0x80000000+startup # Just a restart PSW
@@ -201,7 +203,7 @@
ssch 0(%r3) # load chunk of 1600 bytes
bnz .Llderr
.Lwait4irq:
- mvc __LC_IO_NEW_PSW(8),.Lnewpsw # set up IO interrupt psw
+ mvc 0x78(8),.Lnewpsw # set up IO interrupt psw
lpsw .Lwaitpsw
.Lioint:
c %r1,0xb8 # compare subchannel number
@@ -265,13 +267,13 @@ iplstart:
la %r2,IPL_BS # load start address
bas %r14,.Lloader # load rest of ipl image
l %r12,.Lparm # pointer to parameter area
- st %r1,IPL_DEVICE-PARMAREA(%r12) # store ipl device number
+ st %r1,IPL_DEVICE+ARCH_OFFSET-PARMAREA(%r12) # save ipl device number
#
# load parameter file from ipl device
#
.Lagain1:
- l %r2,INITRD_START-PARMAREA(%r12) # use ramdisk location as temp
+ l %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12) # ramdisk loc. is temp
bas %r14,.Lloader # load parameter file
ltr %r2,%r2 # got anything ?
bz .Lnopf
@@ -279,7 +281,7 @@ iplstart:
bnh .Lnotrunc
la %r2,895
.Lnotrunc:
- l %r4,INITRD_START-PARMAREA(%r12)
+ l %r4,INITRD_START+ARCH_OFFSET-PARMAREA(%r12)
clc 0(3,%r4),.L_hdr # if it is HDRx
bz .Lagain1 # skip dataset header
clc 0(3,%r4),.L_eof # if it is EOFx
@@ -322,14 +324,14 @@ iplstart:
# load ramdisk from ipl device
#
.Lagain2:
- l %r2,INITRD_START-PARMAREA(%r12) # load adr. of ramdisk
+ l %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12) # addr of ramdisk
bas %r14,.Lloader # load ramdisk
- st %r2,INITRD_SIZE-PARMAREA(%r12) # store size of ramdisk
+ st %r2,INITRD_SIZE+ARCH_OFFSET-PARMAREA(%r12) # store size of ramdisk
ltr %r2,%r2
bnz .Lrdcont
- st %r2,INITRD_START-PARMAREA(%r12) # no ramdisk found, null it
+ st %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12) # no ramdisk found
.Lrdcont:
- l %r2,INITRD_START-PARMAREA(%r12)
+ l %r2,INITRD_START+ARCH_OFFSET-PARMAREA(%r12)
clc 0(3,%r2),.L_hdr # skip HDRx and EOFx
bz .Lagain2
@@ -432,10 +434,10 @@ start:
la %r3,1(%r3)
.done:
l %r1,.memsize
- st %r3,0(%r1)
+ st %r3,ARCH_OFFSET(%r1)
slr %r0,%r0
- st %r0,INITRD_SIZE-PARMAREA(%r11)
- st %r0,INITRD_START-PARMAREA(%r11)
+ st %r0,INITRD_SIZE+ARCH_OFFSET-PARMAREA(%r11)
+ st %r0,INITRD_START+ARCH_OFFSET-PARMAREA(%r11)
j startup # continue with startup
.tbl: .long _ebcasc # translate table
.cmd: .long COMMAND_LINE # address of command line buffer
@@ -478,303 +480,23 @@ start:
.byte 0xf0,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7
.byte 0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfe,0xff
-#
-# startup-code at 0x10000, running in real mode
-# this is called either by the ipl loader or directly by PSW restart
-# or linload or SALIPL
-#
- .org 0x10000
-startup:basr %r13,0 # get base
-.LPG1: l %r1, .Lget_ipl_device_addr-.LPG1(%r13)
- basr %r14, %r1
- lctl %c0,%c15,.Lctl-.LPG1(%r13) # load control registers
- la %r12,_pstart-.LPG1(%r13) # pointer to parameter area
- # move IPL device to lowcore
- mvc __LC_IPLDEV(4),IPL_DEVICE-PARMAREA(%r12)
-
-#
-# clear bss memory
-#
- l %r2,.Lbss_bgn-.LPG1(%r13) # start of bss
- l %r3,.Lbss_end-.LPG1(%r13) # end of bss
- sr %r3,%r2 # length of bss
- sr %r4,%r4 #
- sr %r5,%r5 # set src,length and pad to zero
- sr %r0,%r0 #
- mvcle %r2,%r4,0 # clear mem
- jo .-4 # branch back, if not finish
-
- l %r2,.Lrcp-.LPG1(%r13) # Read SCP forced command word
-.Lservicecall:
- stosm .Lpmask-.LPG1(%r13),0x01 # authorize ext interrupts
-
- stctl %r0, %r0,.Lcr-.LPG1(%r13) # get cr0
- la %r1,0x200 # set bit 22
- o %r1,.Lcr-.LPG1(%r13) # or old cr0 with r1
- st %r1,.Lcr-.LPG1(%r13)
- lctl %r0, %r0,.Lcr-.LPG1(%r13) # load modified cr0
-
- mvc __LC_EXT_NEW_PSW(8),.Lpcext-.LPG1(%r13) # set postcall psw
- la %r1, .Lsclph-.LPG1(%r13)
- a %r1,__LC_EXT_NEW_PSW+4 # set handler
- st %r1,__LC_EXT_NEW_PSW+4
-
- la %r4,_pstart-.LPG1(%r13) # %r4 is our index for sccb stuff
- la %r1, .Lsccb-PARMAREA(%r4) # our sccb
- .insn rre,0xb2200000,%r2,%r1 # service call
- ipm %r1
- srl %r1,28 # get cc code
- xr %r3, %r3
- chi %r1,3
- be .Lfchunk-.LPG1(%r13) # leave
- chi %r1,2
- be .Lservicecall-.LPG1(%r13)
- lpsw .Lwaitsclp-.LPG1(%r13)
-.Lsclph:
- lh %r1,.Lsccbr-PARMAREA(%r4)
- chi %r1,0x10 # 0x0010 is the sucess code
- je .Lprocsccb # let's process the sccb
- chi %r1,0x1f0
- bne .Lfchunk-.LPG1(%r13) # unhandled error code
- c %r2, .Lrcp-.LPG1(%r13) # Did we try Read SCP forced
- bne .Lfchunk-.LPG1(%r13) # if no, give up
- l %r2, .Lrcp2-.LPG1(%r13) # try with Read SCP
- b .Lservicecall-.LPG1(%r13)
-.Lprocsccb:
- lhi %r1,0
- icm %r1,3,.Lscpincr1-PARMAREA(%r4) # use this one if != 0
- jnz .Lscnd
- lhi %r1,0x800 # otherwise report 2GB
-.Lscnd:
- lhi %r3,0x800 # limit reported memory size to 2GB
- cr %r1,%r3
- jl .Lno2gb
- lr %r1,%r3
-.Lno2gb:
- xr %r3,%r3 # same logic
- ic %r3,.Lscpa1-PARMAREA(%r4)
- chi %r3,0x00
- jne .Lcompmem
- l %r3,.Lscpa2-PARMAREA(%r13)
-.Lcompmem:
- mr %r2,%r1 # mem in MB on 128-bit
- l %r1,.Lonemb-.LPG1(%r13)
- mr %r2,%r1 # mem size in bytes in %r3
- b .Lfchunk-.LPG1(%r13)
-
- .align 4
-.Lget_ipl_device_addr:
- .long .Lget_ipl_device
-.Lpmask:
- .byte 0
-.align 8
-.Lpcext:.long 0x00080000,0x80000000
-.Lcr:
- .long 0x00 # place holder for cr0
-.Lwaitsclp:
- .long 0x010a0000,0x80000000 + .Lsclph
-.Lrcp:
- .int 0x00120001 # Read SCP forced code
-.Lrcp2:
- .int 0x00020001 # Read SCP code
-.Lonemb:
- .int 0x100000
-.Lfchunk:
-
-#
-# find memory chunks.
-#
- lr %r9,%r3 # end of mem
- mvc __LC_PGM_NEW_PSW(8),.Lpcmem-.LPG1(%r13)
- la %r1,1 # test in increments of 128KB
- sll %r1,17
- l %r3,.Lmchunk-.LPG1(%r13) # get pointer to memory_chunk array
- slr %r4,%r4 # set start of chunk to zero
- slr %r5,%r5 # set end of chunk to zero
- slr %r6,%r6 # set access code to zero
- la %r10, MEMORY_CHUNKS # number of chunks
-.Lloop:
- tprot 0(%r5),0 # test protection of first byte
- ipm %r7
- srl %r7,28
- clr %r6,%r7 # compare cc with last access code
- be .Lsame-.LPG1(%r13)
- b .Lchkmem-.LPG1(%r13)
-.Lsame:
- ar %r5,%r1 # add 128KB to end of chunk
- bno .Lloop-.LPG1(%r13) # r1 < 0x80000000 -> loop
-.Lchkmem: # > 2GB or tprot got a program check
- clr %r4,%r5 # chunk size > 0?
- be .Lchkloop-.LPG1(%r13)
- st %r4,0(%r3) # store start address of chunk
- lr %r0,%r5
- slr %r0,%r4
- st %r0,4(%r3) # store size of chunk
- st %r6,8(%r3) # store type of chunk
- la %r3,12(%r3)
- l %r4,.Lmemsize-.LPG1(%r13) # address of variable memory_size
- st %r5,0(%r4) # store last end to memory size
- ahi %r10,-1 # update chunk number
-.Lchkloop:
- lr %r6,%r7 # set access code to last cc
- # we got an exception or we're starting a new
- # chunk , we must check if we should
- # still try to find valid memory (if we detected
- # the amount of available storage), and if we
- # have chunks left
- xr %r0,%r0
- clr %r0,%r9 # did we detect memory?
- je .Ldonemem # if not, leave
- chi %r10,0 # do we have chunks left?
- je .Ldonemem
- alr %r5,%r1 # add 128KB to end of chunk
- lr %r4,%r5 # potential new chunk
- clr %r5,%r9 # should we go on?
- jl .Lloop
-.Ldonemem:
- l %r12,.Lmflags-.LPG1(%r13) # get address of machine_flags
-#
-# find out if we are running under VM
-#
- stidp __LC_CPUID # store cpuid
- tm __LC_CPUID,0xff # running under VM ?
- bno .Lnovm-.LPG1(%r13)
- oi 3(%r12),1 # set VM flag
-.Lnovm:
- lh %r0,__LC_CPUID+4 # get cpu version
- chi %r0,0x7490 # running on a P/390 ?
- bne .Lnop390-.LPG1(%r13)
- oi 3(%r12),4 # set P/390 flag
-.Lnop390:
-
-#
-# find out if we have an IEEE fpu
-#
- mvc __LC_PGM_NEW_PSW(8),.Lpcfpu-.LPG1(%r13)
- efpc %r0,0 # test IEEE extract fpc instruction
- oi 3(%r12),2 # set IEEE fpu flag
-.Lchkfpu:
-
-#
-# find out if we have the CSP instruction
-#
- mvc __LC_PGM_NEW_PSW(8),.Lpccsp-.LPG1(%r13)
- la %r0,0
- lr %r1,%r0
- la %r2,4
- csp %r0,%r2 # Test CSP instruction
- oi 3(%r12),8 # set CSP flag
-.Lchkcsp:
-
-#
-# find out if we have the MVPG instruction
-#
- mvc __LC_PGM_NEW_PSW(8),.Lpcmvpg-.LPG1(%r13)
- sr %r0,%r0
- la %r1,0
- la %r2,0
- mvpg %r1,%r2 # Test CSP instruction
- oi 3(%r12),16 # set MVPG flag
-.Lchkmvpg:
-
-#
-# find out if we have the IDTE instruction
-#
- mvc __LC_PGM_NEW_PSW(8),.Lpcidte-.LPG1(%r13)
- .long 0xb2b10000 # store facility list
- tm 0xc8,0x08 # check bit for clearing-by-ASCE
- bno .Lchkidte-.LPG1(%r13)
- lhi %r1,2094
- lhi %r2,0
- .long 0xb98e2001
- oi 3(%r12),0x80 # set IDTE flag
-.Lchkidte:
-
- lpsw .Lentry-.LPG1(13) # jump to _stext in primary-space,
- # virtual and never return ...
- .align 8
-.Lentry:.long 0x00080000,0x80000000 + _stext
-.Lctl: .long 0x04b50002 # cr0: various things
- .long 0 # cr1: primary space segment table
- .long .Lduct # cr2: dispatchable unit control table
- .long 0 # cr3: instruction authorization
- .long 0 # cr4: instruction authorization
- .long 0xffffffff # cr5: primary-aste origin
- .long 0 # cr6: I/O interrupts
- .long 0 # cr7: secondary space segment table
- .long 0 # cr8: access registers translation
- .long 0 # cr9: tracing off
- .long 0 # cr10: tracing off
- .long 0 # cr11: tracing off
- .long 0 # cr12: tracing off
- .long 0 # cr13: home space segment table
- .long 0xc0000000 # cr14: machine check handling off
- .long 0 # cr15: linkage stack operations
-.Lpcmem:.long 0x00080000,0x80000000 + .Lchkmem
-.Lpcfpu:.long 0x00080000,0x80000000 + .Lchkfpu
-.Lpccsp:.long 0x00080000,0x80000000 + .Lchkcsp
-.Lpcmvpg:.long 0x00080000,0x80000000 + .Lchkmvpg
-.Lpcidte:.long 0x00080000,0x80000000 + .Lchkidte
-.Lmemsize:.long memory_size
-.Lmchunk:.long memory_chunk
-.Lmflags:.long machine_flags
-.Lbss_bgn: .long __bss_start
-.Lbss_end: .long _end
-
- .org PARMAREA-64
-.Lduct: .long 0,0,0,0,0,0,0,0
- .long 0,0,0,0,0,0,0,0
-
-#
-# params at 10400 (setup.h)
-#
- .org PARMAREA
- .global _pstart
-_pstart:
- .long 0,0 # IPL_DEVICE
- .long 0,RAMDISK_ORIGIN # INITRD_START
- .long 0,RAMDISK_SIZE # INITRD_SIZE
-
- .org COMMAND_LINE
- .byte "root=/dev/ram0 ro"
- .byte 0
- .org 0x11000
-.Lsccb:
- .hword 0x1000 # length, one page
- .byte 0x00,0x00,0x00
- .byte 0x80 # variable response bit set
-.Lsccbr:
- .hword 0x00 # response code
-.Lscpincr1:
- .hword 0x00
-.Lscpa1:
- .byte 0x00
- .fill 89,1,0
-.Lscpa2:
- .int 0x00
-.Lscpincr2:
- .quad 0x00
- .fill 3984,1,0
- .org 0x12000
- .global _pend
-_pend:
-
+.macro GET_IPL_DEVICE
.Lget_ipl_device:
basr %r12,0
-.LPG2: l %r1,0xb8 # get sid
+.LGID: l %r1,0xb8 # get sid
sll %r1,15 # test if subchannel is enabled
srl %r1,31
ltr %r1,%r1
bz 0(%r14) # subchannel disabled
l %r1,0xb8
- la %r5,.Lipl_schib-.LPG2(%r12)
+ la %r5,.Lipl_schib-.LGID(%r12)
stsch 0(%r5) # get schib of subchannel
bnz 0(%r14) # schib not available
tm 5(%r5),0x01 # devno valid?
bno 0(%r14)
- la %r6,ipl_parameter_flags-.LPG2(%r12)
+ la %r6,ipl_parameter_flags-.LGID(%r12)
oi 3(%r6),0x01 # set flag
- la %r2,ipl_devno-.LPG2(%r12)
+ la %r2,ipl_devno-.LGID(%r12)
mvc 0(2,%r2),6(%r5) # store devno
tm 4(%r5),0x80 # qdio capable device?
bno 0(%r14)
@@ -815,46 +537,10 @@ ipl_parameter_flags:
.globl ipl_devno
ipl_devno:
.word 0
+.endm
-#ifdef CONFIG_SHARED_KERNEL
- .org 0x100000
+#ifdef CONFIG_ARCH_S390X
+#include "head64.S"
+#else
+#include "head31.S"
#endif
-
-#
-# startup-code, running in virtual mode
-#
- .globl _stext
-_stext: basr %r13,0 # get base
-.LPG3:
-#
-# Setup stack
-#
- l %r15,.Linittu-.LPG3(%r13)
- mvc __LC_CURRENT(4),__TI_task(%r15)
- ahi %r15,1<<(PAGE_SHIFT+THREAD_ORDER) # init_task_union + THREAD_SIZE
- st %r15,__LC_KERNEL_STACK # set end of kernel stack
- ahi %r15,-96
- xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15) # clear backchain
-
-# check control registers
- stctl %c0,%c15,0(%r15)
- oi 2(%r15),0x40 # enable sigp emergency signal
- oi 0(%r15),0x10 # switch on low address protection
- lctl %c0,%c15,0(%r15)
-
-#
- lam 0,15,.Laregs-.LPG3(%r13) # load access regs needed by uaccess
- l %r14,.Lstart-.LPG3(%r13)
- basr %r14,%r14 # call start_kernel
-#
-# We returned from start_kernel ?!? PANIK
-#
- basr %r13,0
- lpsw .Ldw-.(%r13) # load disabled wait psw
-#
- .align 8
-.Ldw: .long 0x000a0000,0x00000000
-.Linittu: .long init_thread_union
-.Lstart: .long start_kernel
-.Laregs: .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
-
diff -urpN linux-2.6/arch/s390/kernel/Makefile linux-2.6-patched/arch/s390/kernel/Makefile
--- linux-2.6/arch/s390/kernel/Makefile 2005-11-03 13:39:04.000000000 +0100
+++ linux-2.6-patched/arch/s390/kernel/Makefile 2005-11-03 13:39:18.000000000 +0100
@@ -9,9 +9,7 @@ obj-y := bitmap.o traps.o time.o proces
semaphore.o s390_ext.o debug.o profile.o irq.o sgrb.o \
statistic.o reipl_diag.o
-extra-$(CONFIG_ARCH_S390_31) += head.o
-extra-$(CONFIG_ARCH_S390X) += head64.o
-extra-y += init_task.o vmlinux.lds
+extra-y += head.o init_task.o vmlinux.lds
obj-$(CONFIG_MODULES) += s390_ksyms.o module.o
obj-$(CONFIG_SMP) += smp.o
diff -urpN linux-2.6/arch/s390/Makefile linux-2.6-patched/arch/s390/Makefile
--- linux-2.6/arch/s390/Makefile 2005-10-28 02:02:08.000000000 +0200
+++ linux-2.6-patched/arch/s390/Makefile 2005-11-03 13:39:18.000000000 +0100
@@ -76,9 +76,7 @@ AFLAGS += $(aflags-y)
OBJCOPYFLAGS := -O binary
LDFLAGS_vmlinux := -e start
-head-$(CONFIG_ARCH_S390_31) += arch/$(ARCH)/kernel/head.o
-head-$(CONFIG_ARCH_S390X) += arch/$(ARCH)/kernel/head64.o
-head-y += arch/$(ARCH)/kernel/init_task.o
+head-y := arch/$(ARCH)/kernel/head.o arch/$(ARCH)/kernel/init_task.o
core-y += arch/$(ARCH)/mm/ arch/$(ARCH)/kernel/ arch/$(ARCH)/crypto/ \
arch/$(ARCH)/appldata/
-
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