[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>

arch/s390/Makefile

@@ -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/

arch/s390/kernel/Makefile

@@ -8,9 +8,7 @@ obj-y	:=  bitmap.o traps.o time.o process.o \
             setup.o sys_s390.o ptrace.o signal.o cpcmd.o ebcdic.o \
             semaphore.o s390_ext.o debug.o profile.o irq.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

arch/s390/kernel/head.S

@@ -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 (hp@de.ibm.com),
- *               Martin Schwidefsky (schwidefsky@de.ibm.com),
- *               Rob van der Heij (rvdhei@iae.nl)
+ * (C) Copyright IBM Corp. 1999, 2005
+ *
+ *    Author(s): Hartmut Penner <hp@de.ibm.com>
+ *		 Martin Schwidefsky <schwidefsky@de.ibm.com>
+ *		 Rob van der Heij <rvdhei@iae.nl>
+ *		 Heiko Carstens <heiko.carstens@de.ibm.com>
  *
  * 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 <rvdheij@iae.nl>
-	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
-

arch/s390/kernel/head31.S

@@ -0,0 +1,336 @@
+/*
+ * arch/s390/kernel/head31.S
+ *
+ * (C) Copyright IBM Corp. 2005
+ *
+ *   Author(s):	Hartmut Penner <hp@de.ibm.com>
+ *		Martin Schwidefsky <schwidefsky@de.ibm.com>
+ *		Rob van der Heij <rvdhei@iae.nl>
+ *		Heiko Carstens <heiko.carstens@de.ibm.com>
+ *
+ */
+
+#
+# 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

arch/s390/kernel/head64.S

@@ -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 (hp@de.ibm.com),
- *               Martin Schwidefsky (schwidefsky@de.ibm.com),
- *               Rob van der Heij (rvdhei@iae.nl)
+ * (C) Copyright IBM Corp. 1999,2005
+ *
+ *   Author(s):	Hartmut Penner <hp@de.ibm.com>
+ *		Martin Schwidefsky <schwidefsky@de.ibm.com>
+ *		Rob van der Heij <rvdhei@iae.nl>
+ *		Heiko Carstens <heiko.carstens@de.ibm.com>
  *
- * 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 <rvdheij@iae.nl>
-	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