basr %r13,0 # get base
.LPG1: sll %r13,1 # remove high order bit
srl %r13,1
- lhi %r1,1 # mode 1 = esame
+
+#ifdef CONFIG_ZFCPDUMP
+
+ # check if we have been ipled using zfcp dump:
+
+ tm 0xb9,0x01 # test if subchannel is enabled
+ jno .nodump # subchannel disabled
+ l %r1,0xb8
+ la %r5,.Lipl_schib-.LPG1(%r13)
+ stsch 0(%r5) # get schib of subchannel
+ jne .nodump # schib not available
+ tm 5(%r5),0x01 # devno valid?
+ jno .nodump
+ tm 4(%r5),0x80 # qdio capable device?
+ jno .nodump
+ l %r2,20(%r0) # address of ipl parameter block
+ lhi %r3,0
+ ic %r3,0x148(%r2) # get opt field
+ chi %r3,0x20 # load with dump?
+ jne .nodump
+
+ # store all prefix registers in case of load with dump:
+
+ la %r7,0 # base register for 0 page
+ la %r8,0 # first cpu
+ l %r11,.Lpref_arr_ptr-.LPG1(%r13) # address of prefix array
+ ahi %r11,4 # skip boot cpu
+ lr %r12,%r11
+ ahi %r12,(CONFIG_NR_CPUS*4) # end of prefix array
+ stap .Lcurrent_cpu+2-.LPG1(%r13) # store current cpu addr
+1:
+ cl %r8,.Lcurrent_cpu-.LPG1(%r13) # is ipl cpu ?
+ je 4f # if yes get next cpu
+2:
+ lr %r9,%r7
+ sigp %r9,%r8,0x9 # stop & store status of cpu
+ brc 8,3f # accepted
+ brc 4,4f # status stored: next cpu
+ brc 2,2b # busy: try again
+ brc 1,4f # not op: next cpu
+3:
+ mvc 0(4,%r11),264(%r7) # copy prefix register to prefix array
+ ahi %r11,4 # next element in prefix array
+ clr %r11,%r12
+ je 5f # no more space in prefix array
+4:
+ ahi %r8,1 # next cpu (r8 += 1)
+ cl %r8,.Llast_cpu-.LPG1(%r13) # is last possible cpu ?
+ jl 1b # jump if not last cpu
+5:
+ lhi %r1,2 # mode 2 = esame (dump)
+ j 6f
+ .align 4
+.Lipl_schib:
+ .rept 13
+ .long 0
+ .endr
+.nodump:
+ lhi %r1,1 # mode 1 = esame (normal ipl)
+6:
+#else
+ lhi %r1,1 # mode 1 = esame (normal ipl)
+#endif /* CONFIG_ZFCPDUMP */
mvi __LC_AR_MODE_ID,1 # set esame flag
slr %r0,%r0 # set cpuid to zero
sigp %r1,%r0,0x12 # switch to esame mode
stg %r15,__LC_KERNEL_STACK # set end of kernel stack
aghi %r15,-160
xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15) # clear backchain
-
- brasl %r14,ipl_save_parameters
#
-# clear bss memory
+# Save ipl parameters, clear bss memory, initialize storage key for kernel pages,
+# and create a kernel NSS if the SAVESYS= parm is defined
#
- larl %r2,__bss_start # start of bss segment
- larl %r3,_end # end of bss segment
- sgr %r3,%r2 # length of bss
- sgr %r4,%r4 #
- sgr %r5,%r5 # set src,length and pad to zero
- mvcle %r2,%r4,0 # clear mem
- jo .-4 # branch back, if not finish
+ brasl %r14,startup_init
# set program check new psw mask
mvc __LC_PGM_NEW_PSW(8),.Lpcmsk-.LPG1(%r13)
- larl %r1,.Lslowmemdetect # set program check address
- stg %r1,__LC_PGM_NEW_PSW+8
- lghi %r1,0xc
- diag %r0,%r1,0x260 # get memory size of virtual machine
- cgr %r0,%r1 # different? -> old detection routine
- jne .Lslowmemdetect
- aghi %r1,1 # size is one more than end
- larl %r2,memory_chunk
- stg %r1,8(%r2) # store size of chunk
- j .Ldonemem
-
-.Lslowmemdetect:
- l %r2,.Lrcp-.LPG1(%r13) # Read SCP forced command word
-.Lservicecall:
- stosm .Lpmask-.LPG1(%r13),0x01 # authorize ext interrupts
-
- stctg %r0,%r0,.Lcr-.LPG1(%r13) # get cr0
- la %r1,0x200 # set bit 22
- og %r1,.Lcr-.LPG1(%r13) # or old cr0 with r1
- stg %r1,.Lcr-.LPG1(%r13)
- lctlg %r0,%r0,.Lcr-.LPG1(%r13) # load modified cr0
-
- mvc __LC_EXT_NEW_PSW(8),.Lpcmsk-.LPG1(%r13) # set postcall psw
- larl %r1,.Lsclph
- stg %r1,__LC_EXT_NEW_PSW+8 # set handler
-
- larl %r4,.Lsccb # %r4 is our index for sccb stuff
- lgr %r1,%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)
- lpswe .Lwaitsclp-.LPG1(%r13)
-.Lsclph:
- lh %r1,.Lsccbr-.Lsccb(%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:
- lghi %r1,0
- icm %r1,3,.Lscpincr1-.Lsccb(%r4) # use this one if != 0
- jnz .Lscnd
- lg %r1,.Lscpincr2-.Lsccb(%r4) # otherwise use this one
-.Lscnd:
- xr %r3,%r3 # same logic
- ic %r3,.Lscpa1-.Lsccb(%r4)
- chi %r3,0x00
- jne .Lcompmem
- l %r3,.Lscpa2-.Lsccb(%r4)
-.Lcompmem:
- mlgr %r2,%r1 # mem in MB on 128-bit
- l %r1,.Lonemb-.LPG1(%r13)
- mlgr %r2,%r1 # mem size in bytes in %r3
- b .Lfchunk-.LPG1(%r13)
-
- .align 4
-.Lpmask:
- .byte 0
- .align 8
-.Lcr:
- .quad 0x00 # place holder for cr0
-.Lwaitsclp:
- .quad 0x0102000180000000,.Lsclph
-.Lrcp:
- .int 0x00120001 # Read SCP forced code
-.Lrcp2:
- .int 0x00020001 # Read SCP code
-.Lonemb:
- .int 0x100000
-
-.Lfchunk:
-
-#
-# find memory chunks.
-#
- lgr %r9,%r3 # end of mem
- larl %r1,.Lchkmem # set program check address
- stg %r1,__LC_PGM_NEW_PSW+8
- la %r1,1 # test in increments of 128KB
- sllg %r1,%r1,17
- larl %r3,memory_chunk
- slgr %r4,%r4 # set start of chunk to zero
- slgr %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
- je .Lsame
- lghi %r8,0 # no program checks
- j .Lsavchk
-.Lsame:
- algr %r5,%r1 # add 128KB to end of chunk
- # no need to check here,
- brc 12,.Lloop # this is the same chunk
-.Lchkmem: # > 16EB or tprot got a program check
- lghi %r8,1 # set program check flag
-.Lsavchk:
- clgr %r4,%r5 # chunk size > 0?
- je .Lchkloop
- stg %r4,0(%r3) # store start address of chunk
- lgr %r0,%r5
- slgr %r0,%r4
- stg %r0,8(%r3) # store size of chunk
- st %r6,20(%r3) # store type of chunk
- la %r3,24(%r3)
- 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
- lghi %r4,1
- sllg %r4,%r4,31
- clgr %r5,%r4
- je .Lhsaskip
- xr %r0, %r0
- clgr %r0, %r9 # did we detect memory?
- je .Ldonemem # if not, leave
- chi %r10, 0 # do we have chunks left?
- je .Ldonemem
-.Lhsaskip:
- chi %r8,1 # program check ?
- je .Lpgmchk
- lgr %r4,%r5 # potential new chunk
- algr %r5,%r1 # add 128KB to end of chunk
- j .Llpcnt
-.Lpgmchk:
- algr %r5,%r1 # add 128KB to end of chunk
- lgr %r4,%r5 # potential new chunk
-.Llpcnt:
- clgr %r5,%r9 # should we go on?
- jl .Lloop
-.Ldonemem:
-
larl %r12,machine_flags
-#
-# find out if we are running under VM
-#
- stidp __LC_CPUID # store cpuid
- tm __LC_CPUID,0xff # running under VM ?
- bno 0f-.LPG1(%r13)
- oi 7(%r12),1 # set VM flag
-0: lh %r0,__LC_CPUID+4 # get cpu version
- chi %r0,0x7490 # running on a P/390 ?
- bne 1f-.LPG1(%r13)
- oi 7(%r12),4 # set P/390 flag
-1:
-
#
# find out if we have the MVPG instruction
#
.quad .Lduct # cr2: dispatchable unit control table
.quad 0 # cr3: instruction authorization
.quad 0 # cr4: instruction authorization
- .quad 0xffffffffffffffff # cr5: primary-aste origin
+ .quad .Lduct # cr5: primary-aste origin
.quad 0 # cr6: I/O interrupts
.quad 0 # cr7: secondary space segment table
.quad 0 # cr8: access registers translation
.quad 0 # cr13: home space segment table
.quad 0xc0000000 # cr14: machine check handling off
.quad 0 # cr15: linkage stack operations
-.Lduct: .long 0,0,0,0,0,0,0,0
- .long 0,0,0,0,0,0,0,0
.Lpcmsk:.quad 0x0000000180000000
.L4malign:.quad 0xffffffffffc00000
.Lscan2g:.quad 0x80000000 + 0x20000 - 8 # 2GB + 128K - 8
.Lnop: .long 0x07000700
+#ifdef CONFIG_ZFCPDUMP
+.Lcurrent_cpu:
+ .long 0x0
+.Llast_cpu:
+ .long 0x0000ffff
+.Lpref_arr_ptr:
+ .long zfcpdump_prefix_array
+#endif /* CONFIG_ZFCPDUMP */
.Lparmaddr:
.quad PARMAREA
-
- .globl ipl_schib
-ipl_schib:
- .rept 13
- .long 0
+ .align 64
+.Lduct: .long 0,0,0,0,.Lduald,0,0,0
+ .long 0,0,0,0,0,0,0,0
+ .align 128
+.Lduald:.rept 8
+ .long 0x80000000,0,0,0 # invalid access-list entries
.endr
- .globl ipl_flags
-ipl_flags:
- .long 0
- .globl ipl_devno
-ipl_devno:
- .word 0
-
.org 0x12000
-.globl s390_readinfo_sccb
-s390_readinfo_sccb:
-.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 0x13000
-
+ .globl _ehead
+_ehead:
#ifdef CONFIG_SHARED_KERNEL
.org 0x100000
#endif
projects / linux-drm-fsl-dcu.git / blobdiff