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authorTrond Myklebust <Trond.Myklebust@netapp.com>2006-07-05 13:13:03 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2006-07-05 13:13:03 -0400
commit5e66dd6d66ffe758b39b6dcadf2330753ee1159b (patch)
treea72cdcff4448e4af9425cc213ddf56ab23e697fe /arch/s390/kernel/entry.S
parent026477c1141b67e98e3bd8bdedb7d4b88a3ecd09 (diff)
parentca78f6baca863afe2e6a244a0fe94b3a70211d46 (diff)
Merge branch 'master' of /home/trondmy/kernel/linux-2.6/
Diffstat (limited to 'arch/s390/kernel/entry.S')
-rw-r--r--arch/s390/kernel/entry.S29
1 files changed, 28 insertions, 1 deletions
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index d8948c342caf..5b5799ac8f83 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -58,6 +58,21 @@ STACK_SIZE = 1 << STACK_SHIFT
58 58
59#define BASED(name) name-system_call(%r13) 59#define BASED(name) name-system_call(%r13)
60 60
61#ifdef CONFIG_TRACE_IRQFLAGS
62 .macro TRACE_IRQS_ON
63 l %r1,BASED(.Ltrace_irq_on)
64 basr %r14,%r1
65 .endm
66
67 .macro TRACE_IRQS_OFF
68 l %r1,BASED(.Ltrace_irq_off)
69 basr %r14,%r1
70 .endm
71#else
72#define TRACE_IRQS_ON
73#define TRACE_IRQS_OFF
74#endif
75
61/* 76/*
62 * Register usage in interrupt handlers: 77 * Register usage in interrupt handlers:
63 * R9 - pointer to current task structure 78 * R9 - pointer to current task structure
@@ -361,6 +376,7 @@ ret_from_fork:
361 st %r15,SP_R15(%r15) # store stack pointer for new kthread 376 st %r15,SP_R15(%r15) # store stack pointer for new kthread
3620: l %r1,BASED(.Lschedtail) 3770: l %r1,BASED(.Lschedtail)
363 basr %r14,%r1 378 basr %r14,%r1
379 TRACE_IRQS_ON
364 stosm __SF_EMPTY(%r15),0x03 # reenable interrupts 380 stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
365 b BASED(sysc_return) 381 b BASED(sysc_return)
366 382
@@ -516,6 +532,7 @@ pgm_no_vtime3:
516 mvc __THREAD_per+__PER_address(4,%r1),__LC_PER_ADDRESS 532 mvc __THREAD_per+__PER_address(4,%r1),__LC_PER_ADDRESS
517 mvc __THREAD_per+__PER_access_id(1,%r1),__LC_PER_ACCESS_ID 533 mvc __THREAD_per+__PER_access_id(1,%r1),__LC_PER_ACCESS_ID
518 oi __TI_flags+3(%r9),_TIF_SINGLE_STEP # set TIF_SINGLE_STEP 534 oi __TI_flags+3(%r9),_TIF_SINGLE_STEP # set TIF_SINGLE_STEP
535 TRACE_IRQS_ON
519 stosm __SF_EMPTY(%r15),0x03 # reenable interrupts 536 stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
520 b BASED(sysc_do_svc) 537 b BASED(sysc_do_svc)
521 538
@@ -539,9 +556,11 @@ io_int_handler:
539io_no_vtime: 556io_no_vtime:
540#endif 557#endif
541 l %r9,__LC_THREAD_INFO # load pointer to thread_info struct 558 l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
559 TRACE_IRQS_OFF
542 l %r1,BASED(.Ldo_IRQ) # load address of do_IRQ 560 l %r1,BASED(.Ldo_IRQ) # load address of do_IRQ
543 la %r2,SP_PTREGS(%r15) # address of register-save area 561 la %r2,SP_PTREGS(%r15) # address of register-save area
544 basr %r14,%r1 # branch to standard irq handler 562 basr %r14,%r1 # branch to standard irq handler
563 TRACE_IRQS_ON
545 564
546io_return: 565io_return:
547 tm SP_PSW+1(%r15),0x01 # returning to user ? 566 tm SP_PSW+1(%r15),0x01 # returning to user ?
@@ -651,10 +670,12 @@ ext_int_handler:
651ext_no_vtime: 670ext_no_vtime:
652#endif 671#endif
653 l %r9,__LC_THREAD_INFO # load pointer to thread_info struct 672 l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
673 TRACE_IRQS_OFF
654 la %r2,SP_PTREGS(%r15) # address of register-save area 674 la %r2,SP_PTREGS(%r15) # address of register-save area
655 lh %r3,__LC_EXT_INT_CODE # get interruption code 675 lh %r3,__LC_EXT_INT_CODE # get interruption code
656 l %r1,BASED(.Ldo_extint) 676 l %r1,BASED(.Ldo_extint)
657 basr %r14,%r1 677 basr %r14,%r1
678 TRACE_IRQS_ON
658 b BASED(io_return) 679 b BASED(io_return)
659 680
660__critical_end: 681__critical_end:
@@ -731,8 +752,10 @@ mcck_no_vtime:
731 stosm __SF_EMPTY(%r15),0x04 # turn dat on 752 stosm __SF_EMPTY(%r15),0x04 # turn dat on
732 tm __TI_flags+3(%r9),_TIF_MCCK_PENDING 753 tm __TI_flags+3(%r9),_TIF_MCCK_PENDING
733 bno BASED(mcck_return) 754 bno BASED(mcck_return)
755 TRACE_IRQS_OFF
734 l %r1,BASED(.Ls390_handle_mcck) 756 l %r1,BASED(.Ls390_handle_mcck)
735 basr %r14,%r1 # call machine check handler 757 basr %r14,%r1 # call machine check handler
758 TRACE_IRQS_ON
736mcck_return: 759mcck_return:
737 mvc __LC_RETURN_MCCK_PSW(8),SP_PSW(%r15) # move return PSW 760 mvc __LC_RETURN_MCCK_PSW(8),SP_PSW(%r15) # move return PSW
738 ni __LC_RETURN_MCCK_PSW+1,0xfd # clear wait state bit 761 ni __LC_RETURN_MCCK_PSW+1,0xfd # clear wait state bit
@@ -1012,7 +1035,11 @@ cleanup_io_leave_insn:
1012.Lvfork: .long sys_vfork 1035.Lvfork: .long sys_vfork
1013.Lschedtail: .long schedule_tail 1036.Lschedtail: .long schedule_tail
1014.Lsysc_table: .long sys_call_table 1037.Lsysc_table: .long sys_call_table
1015 1038#ifdef CONFIG_TRACE_IRQFLAGS
1039.Ltrace_irq_on:.long trace_hardirqs_on
1040.Ltrace_irq_off:
1041 .long trace_hardirqs_off
1042#endif
1016.Lcritical_start: 1043.Lcritical_start:
1017 .long __critical_start + 0x80000000 1044 .long __critical_start + 0x80000000
1018.Lcritical_end: 1045.Lcritical_end: