- 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
-
- 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
- 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-.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:
- lhi %r1,0
- icm %r1,3,.Lscpincr1-.Lsccb(%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-.Lsccb(%r4)
- chi %r3,0x00
- jne .Lcompmem
- l %r3,.Lscpa2-.Lsccb(%r4)
-.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
-.Lipl_save_parameters:
- .long ipl_save_parameters
-.Linittu:
- .long init_thread_union
-.Lpmask:
- .byte 0
- .align 8
-.Lpcext:.long 0x00080000,0x80000000
-.Lcr:
- .long 0x00 # place holder for cr0
- .align 8
-.Lwaitsclp:
- .long 0x010a0000,0x80000000 + .Lsclph
-.Lrcp:
- .int 0x00120001 # Read SCP forced code
-.Lrcp2:
- .int 0x00020001 # Read SCP code
-.Lonemb:
- .int 0x100000
-.Lfchunk: