diff options
Diffstat (limited to 'arch/s390/kernel/head31.S')
| -rw-r--r-- | arch/s390/kernel/head31.S | 59 |
1 files changed, 45 insertions, 14 deletions
diff --git a/arch/s390/kernel/head31.S b/arch/s390/kernel/head31.S index a4dc61f3285..1b952a3664e 100644 --- a/arch/s390/kernel/head31.S +++ b/arch/s390/kernel/head31.S @@ -26,8 +26,8 @@ startup:basr %r13,0 # get base # .org PARMAREA .long 0,0 # IPL_DEVICE - .long 0,RAMDISK_ORIGIN # INITRD_START - .long 0,RAMDISK_SIZE # INITRD_SIZE + .long 0,0 # INITRD_START + .long 0,0 # INITRD_SIZE .org COMMAND_LINE .byte "root=/dev/ram0 ro" @@ -37,12 +37,23 @@ startup:basr %r13,0 # get base startup_continue: basr %r13,0 # get base -.LPG1: GET_IPL_DEVICE +.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 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 # @@ -114,6 +125,10 @@ startup_continue: b .Lfchunk-.LPG1(%r13) .align 4 +.Lipl_save_parameters: + .long ipl_save_parameters +.Linittu: + .long init_thread_union .Lpmask: .byte 0 .align 8 @@ -239,6 +254,16 @@ startup_continue: 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 @@ -266,6 +291,7 @@ startup_continue: .Lpccsp:.long 0x00080000,0x80000000 + .Lchkcsp .Lpcmvpg:.long 0x00080000,0x80000000 + .Lchkmvpg .Lpcidte:.long 0x00080000,0x80000000 + .Lchkidte +.Lpcdiag9c:.long 0x00080000,0x80000000 + .Lchkdiag9c .Lmemsize:.long memory_size .Lmchunk:.long memory_chunk .Lmflags:.long machine_flags @@ -273,7 +299,23 @@ startup_continue: .Lbss_end: .long _end .Lparmaddr: .long PARMAREA .Lsccbaddr: .long .Lsccb + + .globl ipl_schib +ipl_schib: + .rept 13 + .long 0 + .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 @@ -302,16 +344,6 @@ startup_continue: .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 @@ -330,6 +362,5 @@ _stext: basr %r13,0 # get base # .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 |