diff options
Diffstat (limited to 'arch/s390/kernel/head64.S')
| -rw-r--r-- | arch/s390/kernel/head64.S | 72 |
1 files changed, 71 insertions, 1 deletions
diff --git a/arch/s390/kernel/head64.S b/arch/s390/kernel/head64.S index 37010709fe68..a87b1976d409 100644 --- a/arch/s390/kernel/head64.S +++ b/arch/s390/kernel/head64.S @@ -39,7 +39,69 @@ startup_continue: 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 @@ -149,6 +211,14 @@ startup_continue: .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 .align 64 |