/*
* arch/s390/kernel/head31.S
*
- * (C) Copyright IBM Corp. 2005
+ * Copyright (C) IBM Corp. 2005,2006
*
* Author(s): Hartmut Penner <hp@de.ibm.com>
* Martin Schwidefsky <schwidefsky@de.ibm.com>
# or linload or SALIPL
#
.org 0x10000
-startup:basr %r13,0 # get base
-.LPG1: l %r1, .Lget_ipl_device_addr-.LPG1(%r13)
- basr %r14, %r1
+startup:basr %r13,0 # get base
+.LPG0: l %r13,0f-.LPG0(%r13)
+ b 0(%r13)
+0: .long startup_continue
+
+#
+# params at 10400 (setup.h)
+#
+ .org PARMAREA
+ .long 0,0 # IPL_DEVICE
+ .long 0,0 # INITRD_START
+ .long 0,0 # INITRD_SIZE
+
+ .org COMMAND_LINE
+ .byte "root=/dev/ram0 ro"
+ .byte 0
+
+ .org 0x11000
+
+startup_continue:
+ basr %r13,0 # get base
+.LPG1: mvi __LC_AR_MODE_ID,0 # set ESA flag (mode 0)
lctl %c0,%c15,.Lctl-.LPG1(%r13) # load control registers
- la %r12,_pstart-.LPG1(%r13) # pointer to parameter area
- # move IPL device to lowcore
+ l %r12,.Lparmaddr-.LPG1(%r13) # pointer to parameter area
+ # move IPL device to lowcore
mvc __LC_IPLDEV(4),IPL_DEVICE-PARMAREA(%r12)
+#
+# Setup stack
+#
+ l %r15,.Linittu-.LPG1(%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
+ l %r14,.Lipl_save_parameters-.LPG1(%r13)
+ basr %r14,%r14
#
# clear bss memory
#
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
+ l %r4,.Lsccbaddr-.LPG1(%r13) # %r4 is our index for sccb stuff
+ lr %r1,%r4 # our sccb
.insn rre,0xb2200000,%r2,%r1 # service call
ipm %r1
srl %r1,28 # get cc code
be .Lservicecall-.LPG1(%r13)
lpsw .Lwaitsclp-.LPG1(%r13)
.Lsclph:
- lh %r1,.Lsccbr-PARMAREA(%r4)
+ lh %r1,.Lsccbr-.Lsccb(%r4)
chi %r1,0x10 # 0x0010 is the sucess code
je .Lprocsccb # let's process the sccb
chi %r1,0x1f0
b .Lservicecall-.LPG1(%r13)
.Lprocsccb:
lhi %r1,0
- icm %r1,3,.Lscpincr1-PARMAREA(%r4) # use this one if != 0
+ icm %r1,3,.Lscpincr1-.Lsccb(%r4) # use this one if != 0
jnz .Lscnd
lhi %r1,0x800 # otherwise report 2GB
.Lscnd:
lr %r1,%r3
.Lno2gb:
xr %r3,%r3 # same logic
- ic %r3,.Lscpa1-PARMAREA(%r4)
+ ic %r3,.Lscpa1-.Lsccb(%r4)
chi %r3,0x00
jne .Lcompmem
- l %r3,.Lscpa2-PARMAREA(%r13)
+ l %r3,.Lscpa2-.Lsccb(%r4)
.Lcompmem:
mr %r2,%r1 # mem in MB on 128-bit
l %r1,.Lonemb-.LPG1(%r13)
b .Lfchunk-.LPG1(%r13)
.align 4
-.Lget_ipl_device_addr:
- .long .Lget_ipl_device
+.Lipl_save_parameters:
+ .long ipl_save_parameters
+.Linittu:
+ .long init_thread_union
.Lpmask:
.byte 0
-.align 8
+ .align 8
.Lpcext:.long 0x00080000,0x80000000
.Lcr:
.long 0x00 # place holder for cr0
+ .align 8
.Lwaitsclp:
.long 0x010a0000,0x80000000 + .Lsclph
.Lrcp:
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
+ 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)
+ lhi %r8,0 # no program checks
+ b .Lsavchk-.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
+ lhi %r8,1 # set program check flag
+.Lsavchk:
clr %r4,%r5 # chunk size > 0?
be .Lchkloop-.LPG1(%r13)
st %r4,0(%r3) # store start address of chunk
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
je .Ldonemem # if not, leave
chi %r10,0 # do we have chunks left?
je .Ldonemem
+ chi %r8,1 # program check ?
+ je .Lpgmchk
+ lr %r4,%r5 # potential new chunk
+ alr %r5,%r1 # add 128KB to end of chunk
+ j .Llpcnt
+.Lpgmchk:
alr %r5,%r1 # add 128KB to end of chunk
lr %r4,%r5 # potential new chunk
+.Llpcnt:
clr %r5,%r9 # should we go on?
jl .Lloop
.Ldonemem:
oi 3(%r12),0x80 # set IDTE flag
.Lchkidte:
+#
+# find out if the diag 0x9c is available
+#
+ mvc __LC_PGM_NEW_PSW(8),.Lpcdiag9c-.LPG1(%r13)
+ stap __LC_CPUID+4 # store cpu address
+ lh %r1,__LC_CPUID+4
+ diag %r1,0,0x9c # test diag 0x9c
+ oi 2(%r12),1 # set diag9c flag
+.Lchkdiag9c:
+
lpsw .Lentry-.LPG1(13) # jump to _stext in primary-space,
# virtual and never return ...
.align 8
.long 0 # cr13: home space segment table
.long 0xc0000000 # cr14: machine check handling off
.long 0 # cr15: linkage stack operations
+.Lduct: .long 0,0,0,0,0,0,0,0
+ .long 0,0,0,0,0,0,0,0
.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
+.Lpcdiag9c:.long 0x00080000,0x80000000 + .Lchkdiag9c
.Lmchunk:.long memory_chunk
.Lmflags:.long machine_flags
.Lbss_bgn: .long __bss_start
.Lbss_end: .long _end
+.Lparmaddr: .long PARMAREA
+.Lsccbaddr: .long .Lsccb
- .org PARMAREA-64
-.Lduct: .long 0,0,0,0,0,0,0,0
- .long 0,0,0,0,0,0,0,0
+ .globl ipl_schib
+ipl_schib:
+ .rept 13
+ .long 0
+ .endr
-#
-# 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
+ .globl ipl_flags
+ipl_flags:
+ .long 0
+ .globl ipl_devno
+ipl_devno:
+ .word 0
- .org COMMAND_LINE
- .byte "root=/dev/ram0 ro"
- .byte 0
- .org 0x11000
+ .org 0x12000
+.globl s390_readinfo_sccb
+s390_readinfo_sccb:
.Lsccb:
.hword 0x1000 # length, one page
.byte 0x00,0x00,0x00
.Lscpincr2:
.quad 0x00
.fill 3984,1,0
- .org 0x12000
- .global _pend
-_pend:
-
- GET_IPL_DEVICE
+ .org 0x13000
#ifdef CONFIG_SHARED_KERNEL
.org 0x100000
#endif
#
-# startup-code, running in virtual mode
+# startup-code, running in absolute addressing 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
#
.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
git://git.onelab.eu / linux-2.6.git / blobdiff