X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=arch%2Fs390%2Fkernel%2Fhead31.S;h=db476d114caabd5c79b016110f503d507de2f312;hb=e3c6d4ee545e427b55882d97d3b663c6411645fe;hp=eca507050e47db9e575df233afbda59b0ed45cc7;hpb=88d5a7bb75b5e8f600e79b16abaf008c7fdfd27d;p=linux-2.6-omap-h63xx.git diff --git a/arch/s390/kernel/head31.S b/arch/s390/kernel/head31.S index eca507050e4..db476d114ca 100644 --- a/arch/s390/kernel/head31.S +++ b/arch/s390/kernel/head31.S @@ -10,34 +10,13 @@ * */ -# -# 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 -.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) +.LPG1: + + mvi __LC_AR_MODE_ID,0 # set ESA flag (mode 0) lctl %c0,%c15,.Lctl-.LPG1(%r13) # load control registers l %r12,.Lparmaddr-.LPG1(%r13) # pointer to parameter area # move IPL device to lowcore @@ -50,229 +29,12 @@ startup_continue: 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 -# - 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: - -# -# 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) - 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 - 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) - 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 - 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: - l %r12,.Lmflags-.LPG1(%r13) # get address of machine_flags # -# find out if we are running under VM +# Save ipl parameters, clear bss memory, initialize storage key for kernel pages, +# and create a kernel NSS if the SAVESYS= parm is defined # - 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: - -# -# 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: - + l %r14,.Lstartup_init-.LPG1(%r13) + basr %r14,%r14 lpsw .Lentry-.LPG1(13) # jump to _stext in primary-space, # virtual and never return ... .align 8 @@ -282,7 +44,7 @@ startup_continue: .long .Lduct # cr2: dispatchable unit control table .long 0 # cr3: instruction authorization .long 0 # cr4: instruction authorization - .long 0xffffffff # cr5: primary-aste origin + .long .Lduct # cr5: primary-aste origin .long 0 # cr6: I/O interrupts .long 0 # cr7: secondary space segment table .long 0 # cr8: access registers translation @@ -293,55 +55,24 @@ startup_continue: .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 -.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 - - .globl ipl_schib -ipl_schib: - .rept 13 - .long 0 +.Linittu: .long init_thread_union +.Lstartup_init: + .long startup_init + .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