*
* Copyright (C) IBM Corp. 1999,2006
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
- * Hartmut Penner (hp@de.ibm.com),
- * Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com),
+ * Hartmut Penner (hp@de.ibm.com),
+ * Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com),
* Heiko Carstens <heiko.carstens@de.ibm.com>
*/
#include <linux/sys.h>
#include <linux/linkage.h>
-#include <linux/config.h>
#include <asm/cache.h>
#include <asm/lowcore.h>
#include <asm/errno.h>
* Stack layout for the system_call stack entry.
* The first few entries are identical to the user_regs_struct.
*/
-SP_PTREGS = STACK_FRAME_OVERHEAD
-SP_ARGS = STACK_FRAME_OVERHEAD + __PT_ARGS
-SP_PSW = STACK_FRAME_OVERHEAD + __PT_PSW
-SP_R0 = STACK_FRAME_OVERHEAD + __PT_GPRS
-SP_R1 = STACK_FRAME_OVERHEAD + __PT_GPRS + 4
-SP_R2 = STACK_FRAME_OVERHEAD + __PT_GPRS + 8
-SP_R3 = STACK_FRAME_OVERHEAD + __PT_GPRS + 12
-SP_R4 = STACK_FRAME_OVERHEAD + __PT_GPRS + 16
-SP_R5 = STACK_FRAME_OVERHEAD + __PT_GPRS + 20
-SP_R6 = STACK_FRAME_OVERHEAD + __PT_GPRS + 24
-SP_R7 = STACK_FRAME_OVERHEAD + __PT_GPRS + 28
-SP_R8 = STACK_FRAME_OVERHEAD + __PT_GPRS + 32
-SP_R9 = STACK_FRAME_OVERHEAD + __PT_GPRS + 36
-SP_R10 = STACK_FRAME_OVERHEAD + __PT_GPRS + 40
-SP_R11 = STACK_FRAME_OVERHEAD + __PT_GPRS + 44
-SP_R12 = STACK_FRAME_OVERHEAD + __PT_GPRS + 48
-SP_R13 = STACK_FRAME_OVERHEAD + __PT_GPRS + 52
-SP_R14 = STACK_FRAME_OVERHEAD + __PT_GPRS + 56
-SP_R15 = STACK_FRAME_OVERHEAD + __PT_GPRS + 60
-SP_ORIG_R2 = STACK_FRAME_OVERHEAD + __PT_ORIG_GPR2
-SP_ILC = STACK_FRAME_OVERHEAD + __PT_ILC
-SP_TRAP = STACK_FRAME_OVERHEAD + __PT_TRAP
-SP_SIZE = STACK_FRAME_OVERHEAD + __PT_SIZE
+SP_PTREGS = STACK_FRAME_OVERHEAD
+SP_ARGS = STACK_FRAME_OVERHEAD + __PT_ARGS
+SP_PSW = STACK_FRAME_OVERHEAD + __PT_PSW
+SP_R0 = STACK_FRAME_OVERHEAD + __PT_GPRS
+SP_R1 = STACK_FRAME_OVERHEAD + __PT_GPRS + 4
+SP_R2 = STACK_FRAME_OVERHEAD + __PT_GPRS + 8
+SP_R3 = STACK_FRAME_OVERHEAD + __PT_GPRS + 12
+SP_R4 = STACK_FRAME_OVERHEAD + __PT_GPRS + 16
+SP_R5 = STACK_FRAME_OVERHEAD + __PT_GPRS + 20
+SP_R6 = STACK_FRAME_OVERHEAD + __PT_GPRS + 24
+SP_R7 = STACK_FRAME_OVERHEAD + __PT_GPRS + 28
+SP_R8 = STACK_FRAME_OVERHEAD + __PT_GPRS + 32
+SP_R9 = STACK_FRAME_OVERHEAD + __PT_GPRS + 36
+SP_R10 = STACK_FRAME_OVERHEAD + __PT_GPRS + 40
+SP_R11 = STACK_FRAME_OVERHEAD + __PT_GPRS + 44
+SP_R12 = STACK_FRAME_OVERHEAD + __PT_GPRS + 48
+SP_R13 = STACK_FRAME_OVERHEAD + __PT_GPRS + 52
+SP_R14 = STACK_FRAME_OVERHEAD + __PT_GPRS + 56
+SP_R15 = STACK_FRAME_OVERHEAD + __PT_GPRS + 60
+SP_ORIG_R2 = STACK_FRAME_OVERHEAD + __PT_ORIG_GPR2
+SP_ILC = STACK_FRAME_OVERHEAD + __PT_ILC
+SP_TRAP = STACK_FRAME_OVERHEAD + __PT_TRAP
+SP_SIZE = STACK_FRAME_OVERHEAD + __PT_SIZE
_TIF_WORK_SVC = (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK | _TIF_NEED_RESCHED | \
_TIF_MCCK_PENDING | _TIF_RESTART_SVC | _TIF_SINGLE_STEP )
#define BASED(name) name-system_call(%r13)
+#ifdef CONFIG_TRACE_IRQFLAGS
+ .macro TRACE_IRQS_ON
+ l %r1,BASED(.Ltrace_irq_on)
+ basr %r14,%r1
+ .endm
+
+ .macro TRACE_IRQS_OFF
+ l %r1,BASED(.Ltrace_irq_off)
+ basr %r14,%r1
+ .endm
+#else
+#define TRACE_IRQS_ON
+#define TRACE_IRQS_OFF
+#endif
+
/*
* Register usage in interrupt handlers:
* R9 - pointer to current task structure
* R15 - kernel stack pointer
*/
- .macro STORE_TIMER lc_offset
+ .macro STORE_TIMER lc_offset
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
stpt \lc_offset
#endif
.endm
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
- .macro UPDATE_VTIME lc_from,lc_to,lc_sum
+ .macro UPDATE_VTIME lc_from,lc_to,lc_sum
lm %r10,%r11,\lc_from
sl %r10,\lc_to
sl %r11,\lc_to+4
l %r13,__LC_SVC_NEW_PSW+4 # load &system_call to %r13
.endm
- .macro SAVE_ALL psworg,savearea,sync
+ .macro SAVE_ALL_SYNC psworg,savearea
la %r12,\psworg
- .if \sync
tm \psworg+1,0x01 # test problem state bit
bz BASED(2f) # skip stack setup save
l %r15,__LC_KERNEL_STACK # problem state -> load ksp
- .else
+#ifdef CONFIG_CHECK_STACK
+ b BASED(3f)
+2: tml %r15,STACK_SIZE - CONFIG_STACK_GUARD
+ bz BASED(stack_overflow)
+3:
+#endif
+2:
+ .endm
+
+ .macro SAVE_ALL_ASYNC psworg,savearea
+ la %r12,\psworg
tm \psworg+1,0x01 # test problem state bit
bnz BASED(1f) # from user -> load async stack
clc \psworg+4(4),BASED(.Lcritical_end)
sra %r14,STACK_SHIFT
be BASED(2f)
1: l %r15,__LC_ASYNC_STACK
- .endif
#ifdef CONFIG_CHECK_STACK
b BASED(3f)
2: tml %r15,STACK_SIZE - CONFIG_STACK_GUARD
2:
.endm
- .macro CREATE_STACK_FRAME psworg,savearea
+ .macro CREATE_STACK_FRAME psworg,savearea
s %r15,BASED(.Lc_spsize) # make room for registers & psw
mvc SP_PSW(8,%r15),0(%r12) # move user PSW to stack
la %r12,\psworg
st %r12,__SF_BACKCHAIN(%r15) # clear back chain
.endm
- .macro RESTORE_ALL psworg,sync
+ .macro RESTORE_ALL psworg,sync
mvc \psworg(8),SP_PSW(%r15) # move user PSW to lowcore
.if !\sync
ni \psworg+1,0xfd # clear wait state bit
* Returns:
* gpr2 = prev
*/
- .globl __switch_to
+ .globl __switch_to
__switch_to:
- basr %r1,0
+ basr %r1,0
__switch_to_base:
tm __THREAD_per(%r3),0xe8 # new process is using per ?
bz __switch_to_noper-__switch_to_base(%r1) # if not we're fine
- stctl %c9,%c11,__SF_EMPTY(%r15) # We are using per stuff
- clc __THREAD_per(12,%r3),__SF_EMPTY(%r15)
- be __switch_to_noper-__switch_to_base(%r1) # we got away w/o bashing TLB's
- lctl %c9,%c11,__THREAD_per(%r3) # Nope we didn't
+ stctl %c9,%c11,__SF_EMPTY(%r15) # We are using per stuff
+ clc __THREAD_per(12,%r3),__SF_EMPTY(%r15)
+ be __switch_to_noper-__switch_to_base(%r1) # we got away w/o bashing TLB's
+ lctl %c9,%c11,__THREAD_per(%r3) # Nope we didn't
__switch_to_noper:
l %r4,__THREAD_info(%r2) # get thread_info of prev
tm __TI_flags+3(%r4),_TIF_MCCK_PENDING # machine check pending?
l %r4,__THREAD_info(%r3) # get thread_info of next
oi __TI_flags+3(%r4),_TIF_MCCK_PENDING # set it in next
__switch_to_no_mcck:
- stm %r6,%r15,__SF_GPRS(%r15)# store __switch_to registers of prev task
+ stm %r6,%r15,__SF_GPRS(%r15)# store __switch_to registers of prev task
st %r15,__THREAD_ksp(%r2) # store kernel stack to prev->tss.ksp
l %r15,__THREAD_ksp(%r3) # load kernel stack from next->tss.ksp
lm %r6,%r15,__SF_GPRS(%r15)# load __switch_to registers of next task
st %r3,__LC_CURRENT # __LC_CURRENT = current task struct
lctl %c4,%c4,__TASK_pid(%r3) # load pid to control reg. 4
- l %r3,__THREAD_info(%r3) # load thread_info from task struct
+ l %r3,__THREAD_info(%r3) # load thread_info from task struct
st %r3,__LC_THREAD_INFO
ahi %r3,STACK_SIZE
st %r3,__LC_KERNEL_STACK # __LC_KERNEL_STACK = new kernel stack
* are executed with interrupts enabled.
*/
- .globl system_call
+ .globl system_call
system_call:
STORE_TIMER __LC_SYNC_ENTER_TIMER
sysc_saveall:
SAVE_ALL_BASE __LC_SAVE_AREA
- SAVE_ALL __LC_SVC_OLD_PSW,__LC_SAVE_AREA,1
+ SAVE_ALL_SYNC __LC_SVC_OLD_PSW,__LC_SAVE_AREA
CREATE_STACK_FRAME __LC_SVC_OLD_PSW,__LC_SAVE_AREA
lh %r7,0x8a # get svc number from lowcore
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
#endif
sysc_do_svc:
l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
- sla %r7,2 # *4 and test for svc 0
- bnz BASED(sysc_nr_ok) # svc number > 0
+ sla %r7,2 # *4 and test for svc 0
+ bnz BASED(sysc_nr_ok) # svc number > 0
# svc 0: system call number in %r1
cl %r1,BASED(.Lnr_syscalls)
bnl BASED(sysc_nr_ok)
- lr %r7,%r1 # copy svc number to %r7
- sla %r7,2 # *4
+ lr %r7,%r1 # copy svc number to %r7
+ sla %r7,2 # *4
sysc_nr_ok:
mvc SP_ARGS(4,%r15),SP_R7(%r15)
sysc_do_restart:
+ l %r8,BASED(.Lsysc_table)
tm __TI_flags+3(%r9),(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT)
- l %r8,sys_call_table-system_call(%r7,%r13) # get system call addr.
- bnz BASED(sysc_tracesys)
- basr %r14,%r8 # call sys_xxxx
- st %r2,SP_R2(%r15) # store return value (change R2 on stack)
- # ATTENTION: check sys_execve_glue before
- # changing anything here !!
+ l %r8,0(%r7,%r8) # get system call addr.
+ bnz BASED(sysc_tracesys)
+ basr %r14,%r8 # call sys_xxxx
+ st %r2,SP_R2(%r15) # store return value (change R2 on stack)
+ # ATTENTION: check sys_execve_glue before
+ # changing anything here !!
sysc_return:
tm SP_PSW+1(%r15),0x01 # returning to user ?
tm __TI_flags+3(%r9),_TIF_WORK_SVC
bnz BASED(sysc_work) # there is work to do (signals etc.)
sysc_leave:
- RESTORE_ALL __LC_RETURN_PSW,1
+ RESTORE_ALL __LC_RETURN_PSW,1
#
# recheck if there is more work to do
#
sysc_work_loop:
tm __TI_flags+3(%r9),_TIF_WORK_SVC
- bz BASED(sysc_leave) # there is no work to do
+ bz BASED(sysc_leave) # there is no work to do
#
# One of the work bits is on. Find out which one.
#
#
# _TIF_NEED_RESCHED is set, call schedule
-#
-sysc_reschedule:
- l %r1,BASED(.Lschedule)
- la %r14,BASED(sysc_work_loop)
- br %r1 # call scheduler
+#
+sysc_reschedule:
+ l %r1,BASED(.Lschedule)
+ la %r14,BASED(sysc_work_loop)
+ br %r1 # call scheduler
#
# _TIF_MCCK_PENDING is set, call handler
#
# _TIF_SIGPENDING or _TIF_RESTORE_SIGMASK is set, call do_signal
#
-sysc_sigpending:
+sysc_sigpending:
ni __TI_flags+3(%r9),255-_TIF_SINGLE_STEP # clear TIF_SINGLE_STEP
- la %r2,SP_PTREGS(%r15) # load pt_regs
- l %r1,BASED(.Ldo_signal)
- basr %r14,%r1 # call do_signal
+ la %r2,SP_PTREGS(%r15) # load pt_regs
+ l %r1,BASED(.Ldo_signal)
+ basr %r14,%r1 # call do_signal
tm __TI_flags+3(%r9),_TIF_RESTART_SVC
bo BASED(sysc_restart)
tm __TI_flags+3(%r9),_TIF_SINGLE_STEP
#
sysc_restart:
ni __TI_flags+3(%r9),255-_TIF_RESTART_SVC # clear TIF_RESTART_SVC
- l %r7,SP_R2(%r15) # load new svc number
+ l %r7,SP_R2(%r15) # load new svc number
sla %r7,2
mvc SP_R2(4,%r15),SP_ORIG_R2(%r15) # restore first argument
- lm %r2,%r6,SP_R2(%r15) # load svc arguments
- b BASED(sysc_do_restart) # restart svc
+ lm %r2,%r6,SP_R2(%r15) # load svc arguments
+ b BASED(sysc_do_restart) # restart svc
#
# _TIF_SINGLE_STEP is set, call do_single_step
# call trace before and after sys_call
#
sysc_tracesys:
- l %r1,BASED(.Ltrace)
- la %r2,SP_PTREGS(%r15) # load pt_regs
+ l %r1,BASED(.Ltrace)
+ la %r2,SP_PTREGS(%r15) # load pt_regs
la %r3,0
srl %r7,2
st %r7,SP_R2(%r15)
basr %r14,%r1
clc SP_R2(4,%r15),BASED(.Lnr_syscalls)
bnl BASED(sysc_tracenogo)
- l %r7,SP_R2(%r15) # strace might have changed the
- sll %r7,2 # system call
- l %r8,sys_call_table-system_call(%r7,%r13)
+ l %r8,BASED(.Lsysc_table)
+ l %r7,SP_R2(%r15) # strace might have changed the
+ sll %r7,2 # system call
+ l %r8,0(%r7,%r8)
sysc_tracego:
lm %r3,%r6,SP_R3(%r15)
l %r2,SP_ORIG_R2(%r15)
- basr %r14,%r8 # call sys_xxx
- st %r2,SP_R2(%r15) # store return value
+ basr %r14,%r8 # call sys_xxx
+ st %r2,SP_R2(%r15) # store return value
sysc_tracenogo:
tm __TI_flags+3(%r9),(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT)
- bz BASED(sysc_return)
+ bz BASED(sysc_return)
l %r1,BASED(.Ltrace)
- la %r2,SP_PTREGS(%r15) # load pt_regs
+ la %r2,SP_PTREGS(%r15) # load pt_regs
la %r3,1
la %r14,BASED(sysc_return)
br %r1
#
# a new process exits the kernel with ret_from_fork
#
- .globl ret_from_fork
+ .globl ret_from_fork
ret_from_fork:
l %r13,__LC_SVC_NEW_PSW+4
l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
tm SP_PSW+1(%r15),0x01 # forking a kernel thread ?
bo BASED(0f)
st %r15,SP_R15(%r15) # store stack pointer for new kthread
-0: l %r1,BASED(.Lschedtail)
- basr %r14,%r1
- stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
+0: l %r1,BASED(.Lschedtail)
+ basr %r14,%r1
+ TRACE_IRQS_ON
+ stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
b BASED(sysc_return)
#
# but are called with different parameter.
# return-address is set up above
#
-sys_clone_glue:
- la %r2,SP_PTREGS(%r15) # load pt_regs
- l %r1,BASED(.Lclone)
- br %r1 # branch to sys_clone
-
-sys_fork_glue:
- la %r2,SP_PTREGS(%r15) # load pt_regs
- l %r1,BASED(.Lfork)
- br %r1 # branch to sys_fork
-
-sys_vfork_glue:
- la %r2,SP_PTREGS(%r15) # load pt_regs
- l %r1,BASED(.Lvfork)
- br %r1 # branch to sys_vfork
-
-sys_execve_glue:
- la %r2,SP_PTREGS(%r15) # load pt_regs
- l %r1,BASED(.Lexecve)
- lr %r12,%r14 # save return address
- basr %r14,%r1 # call sys_execve
- ltr %r2,%r2 # check if execve failed
- bnz 0(%r12) # it did fail -> store result in gpr2
- b 4(%r12) # SKIP ST 2,SP_R2(15) after BASR 14,8
- # in system_call/sysc_tracesys
-
-sys_sigreturn_glue:
- la %r2,SP_PTREGS(%r15) # load pt_regs as parameter
- l %r1,BASED(.Lsigreturn)
- br %r1 # branch to sys_sigreturn
-
-sys_rt_sigreturn_glue:
- la %r2,SP_PTREGS(%r15) # load pt_regs as parameter
- l %r1,BASED(.Lrt_sigreturn)
- br %r1 # branch to sys_sigreturn
+sys_clone_glue:
+ la %r2,SP_PTREGS(%r15) # load pt_regs
+ l %r1,BASED(.Lclone)
+ br %r1 # branch to sys_clone
-sys_sigaltstack_glue:
- la %r4,SP_PTREGS(%r15) # load pt_regs as parameter
- l %r1,BASED(.Lsigaltstack)
- br %r1 # branch to sys_sigreturn
+sys_fork_glue:
+ la %r2,SP_PTREGS(%r15) # load pt_regs
+ l %r1,BASED(.Lfork)
+ br %r1 # branch to sys_fork
+sys_vfork_glue:
+ la %r2,SP_PTREGS(%r15) # load pt_regs
+ l %r1,BASED(.Lvfork)
+ br %r1 # branch to sys_vfork
+
+sys_execve_glue:
+ la %r2,SP_PTREGS(%r15) # load pt_regs
+ l %r1,BASED(.Lexecve)
+ lr %r12,%r14 # save return address
+ basr %r14,%r1 # call sys_execve
+ ltr %r2,%r2 # check if execve failed
+ bnz 0(%r12) # it did fail -> store result in gpr2
+ b 4(%r12) # SKIP ST 2,SP_R2(15) after BASR 14,8
+ # in system_call/sysc_tracesys
+
+sys_sigreturn_glue:
+ la %r2,SP_PTREGS(%r15) # load pt_regs as parameter
+ l %r1,BASED(.Lsigreturn)
+ br %r1 # branch to sys_sigreturn
+
+sys_rt_sigreturn_glue:
+ la %r2,SP_PTREGS(%r15) # load pt_regs as parameter
+ l %r1,BASED(.Lrt_sigreturn)
+ br %r1 # branch to sys_sigreturn
+
+sys_sigaltstack_glue:
+ la %r4,SP_PTREGS(%r15) # load pt_regs as parameter
+ l %r1,BASED(.Lsigaltstack)
+ br %r1 # branch to sys_sigreturn
/*
* Program check handler routine
*/
- .globl pgm_check_handler
+ .globl pgm_check_handler
pgm_check_handler:
/*
* First we need to check for a special case:
*/
STORE_TIMER __LC_SYNC_ENTER_TIMER
SAVE_ALL_BASE __LC_SAVE_AREA
- tm __LC_PGM_INT_CODE+1,0x80 # check whether we got a per exception
- bnz BASED(pgm_per) # got per exception -> special case
- SAVE_ALL __LC_PGM_OLD_PSW,__LC_SAVE_AREA,1
+ tm __LC_PGM_INT_CODE+1,0x80 # check whether we got a per exception
+ bnz BASED(pgm_per) # got per exception -> special case
+ SAVE_ALL_SYNC __LC_PGM_OLD_PSW,__LC_SAVE_AREA
CREATE_STACK_FRAME __LC_PGM_OLD_PSW,__LC_SAVE_AREA
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
pgm_no_vtime:
#endif
l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
- l %r3,__LC_PGM_ILC # load program interruption code
+ l %r3,__LC_PGM_ILC # load program interruption code
la %r8,0x7f
nr %r8,%r3
pgm_do_call:
- l %r7,BASED(.Ljump_table)
- sll %r8,2
- l %r7,0(%r8,%r7) # load address of handler routine
- la %r2,SP_PTREGS(%r15) # address of register-save area
- la %r14,BASED(sysc_return)
- br %r7 # branch to interrupt-handler
+ l %r7,BASED(.Ljump_table)
+ sll %r8,2
+ l %r7,0(%r8,%r7) # load address of handler routine
+ la %r2,SP_PTREGS(%r15) # address of register-save area
+ la %r14,BASED(sysc_return)
+ br %r7 # branch to interrupt-handler
#
# handle per exception
#
pgm_per:
- tm __LC_PGM_OLD_PSW,0x40 # test if per event recording is on
- bnz BASED(pgm_per_std) # ok, normal per event from user space
+ tm __LC_PGM_OLD_PSW,0x40 # test if per event recording is on
+ bnz BASED(pgm_per_std) # ok, normal per event from user space
# ok its one of the special cases, now we need to find out which one
- clc __LC_PGM_OLD_PSW(8),__LC_SVC_NEW_PSW
- be BASED(pgm_svcper)
+ clc __LC_PGM_OLD_PSW(8),__LC_SVC_NEW_PSW
+ be BASED(pgm_svcper)
# no interesting special case, ignore PER event
- lm %r12,%r15,__LC_SAVE_AREA
- lpsw 0x28
+ lm %r12,%r15,__LC_SAVE_AREA
+ lpsw 0x28
#
# Normal per exception
#
pgm_per_std:
- SAVE_ALL __LC_PGM_OLD_PSW,__LC_SAVE_AREA,1
+ SAVE_ALL_SYNC __LC_PGM_OLD_PSW,__LC_SAVE_AREA
CREATE_STACK_FRAME __LC_PGM_OLD_PSW,__LC_SAVE_AREA
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
mvc __THREAD_per+__PER_address(4,%r1),__LC_PER_ADDRESS
mvc __THREAD_per+__PER_access_id(1,%r1),__LC_PER_ACCESS_ID
oi __TI_flags+3(%r9),_TIF_SINGLE_STEP # set TIF_SINGLE_STEP
- l %r3,__LC_PGM_ILC # load program interruption code
+ tm SP_PSW+1(%r15),0x01 # kernel per event ?
+ bz BASED(kernel_per)
+ l %r3,__LC_PGM_ILC # load program interruption code
la %r8,0x7f
- nr %r8,%r3 # clear per-event-bit and ilc
- be BASED(sysc_return) # only per or per+check ?
+ nr %r8,%r3 # clear per-event-bit and ilc
+ be BASED(sysc_return) # only per or per+check ?
b BASED(pgm_do_call)
#
# it was a single stepped SVC that is causing all the trouble
#
pgm_svcper:
- SAVE_ALL __LC_SVC_OLD_PSW,__LC_SAVE_AREA,1
+ SAVE_ALL_SYNC __LC_SVC_OLD_PSW,__LC_SAVE_AREA
CREATE_STACK_FRAME __LC_SVC_OLD_PSW,__LC_SAVE_AREA
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
mvc __THREAD_per+__PER_address(4,%r1),__LC_PER_ADDRESS
mvc __THREAD_per+__PER_access_id(1,%r1),__LC_PER_ACCESS_ID
oi __TI_flags+3(%r9),_TIF_SINGLE_STEP # set TIF_SINGLE_STEP
+ TRACE_IRQS_ON
stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
b BASED(sysc_do_svc)
+#
+# per was called from kernel, must be kprobes
+#
+kernel_per:
+ mvi SP_TRAP+1(%r15),0x28 # set trap indication to pgm check
+ la %r2,SP_PTREGS(%r15) # address of register-save area
+ l %r1,BASED(.Lhandle_per) # load adr. of per handler
+ la %r14,BASED(sysc_leave) # load adr. of system return
+ br %r1 # branch to do_single_step
+
/*
* IO interrupt handler routine
*/
- .globl io_int_handler
+ .globl io_int_handler
io_int_handler:
STORE_TIMER __LC_ASYNC_ENTER_TIMER
stck __LC_INT_CLOCK
SAVE_ALL_BASE __LC_SAVE_AREA+16
- SAVE_ALL __LC_IO_OLD_PSW,__LC_SAVE_AREA+16,0
+ SAVE_ALL_ASYNC __LC_IO_OLD_PSW,__LC_SAVE_AREA+16
CREATE_STACK_FRAME __LC_IO_OLD_PSW,__LC_SAVE_AREA+16
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
io_no_vtime:
#endif
l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
- l %r1,BASED(.Ldo_IRQ) # load address of do_IRQ
- la %r2,SP_PTREGS(%r15) # address of register-save area
- basr %r14,%r1 # branch to standard irq handler
+ TRACE_IRQS_OFF
+ l %r1,BASED(.Ldo_IRQ) # load address of do_IRQ
+ la %r2,SP_PTREGS(%r15) # address of register-save area
+ basr %r14,%r1 # branch to standard irq handler
+ TRACE_IRQS_ON
io_return:
- tm SP_PSW+1(%r15),0x01 # returning to user ?
+ tm SP_PSW+1(%r15),0x01 # returning to user ?
#ifdef CONFIG_PREEMPT
- bno BASED(io_preempt) # no -> check for preemptive scheduling
+ bno BASED(io_preempt) # no -> check for preemptive scheduling
#else
- bno BASED(io_leave) # no-> skip resched & signal
+ bno BASED(io_leave) # no-> skip resched & signal
#endif
tm __TI_flags+3(%r9),_TIF_WORK_INT
- bnz BASED(io_work) # there is work to do (signals etc.)
+ bnz BASED(io_work) # there is work to do (signals etc.)
io_leave:
- RESTORE_ALL __LC_RETURN_PSW,0
+ RESTORE_ALL __LC_RETURN_PSW,0
io_done:
#ifdef CONFIG_PREEMPT
io_preempt:
icm %r0,15,__TI_precount(%r9)
- bnz BASED(io_leave)
+ bnz BASED(io_leave)
l %r1,SP_R15(%r15)
s %r1,BASED(.Lc_spsize)
mvc SP_PTREGS(__PT_SIZE,%r1),SP_PTREGS(%r15)
- xc __SF_BACKCHAIN(4,%r1),__SF_BACKCHAIN(%r1) # clear back chain
+ xc __SF_BACKCHAIN(4,%r1),__SF_BACKCHAIN(%r1) # clear back chain
lr %r15,%r1
io_resume_loop:
tm __TI_flags+3(%r9),_TIF_NEED_RESCHED
bno BASED(io_leave)
- mvc __TI_precount(4,%r9),BASED(.Lc_pactive)
- stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
- l %r1,BASED(.Lschedule)
+ mvc __TI_precount(4,%r9),BASED(.Lc_pactive)
+ stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
+ l %r1,BASED(.Lschedule)
basr %r14,%r1 # call schedule
- stnsm __SF_EMPTY(%r15),0xfc # disable I/O and ext. interrupts
- xc __TI_precount(4,%r9),__TI_precount(%r9)
+ stnsm __SF_EMPTY(%r15),0xfc # disable I/O and ext. interrupts
+ xc __TI_precount(4,%r9),__TI_precount(%r9)
b BASED(io_resume_loop)
#endif
l %r1,__LC_KERNEL_STACK
s %r1,BASED(.Lc_spsize)
mvc SP_PTREGS(__PT_SIZE,%r1),SP_PTREGS(%r15)
- xc __SF_BACKCHAIN(4,%r1),__SF_BACKCHAIN(%r1) # clear back chain
+ xc __SF_BACKCHAIN(4,%r1),__SF_BACKCHAIN(%r1) # clear back chain
lr %r15,%r1
#
# One of the work bits is on. Find out which one.
# Checked are: _TIF_SIGPENDING, _TIF_RESTORE_SIGMASK, _TIF_NEED_RESCHED
-# and _TIF_MCCK_PENDING
+# and _TIF_MCCK_PENDING
#
io_work_loop:
tm __TI_flags+3(%r9),_TIF_MCCK_PENDING
- bo BASED(io_mcck_pending)
+ bo BASED(io_mcck_pending)
tm __TI_flags+3(%r9),_TIF_NEED_RESCHED
bo BASED(io_reschedule)
tm __TI_flags+3(%r9),(_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK)
io_mcck_pending:
l %r1,BASED(.Ls390_handle_mcck)
la %r14,BASED(io_work_loop)
- br %r1 # TIF bit will be cleared by handler
+ br %r1 # TIF bit will be cleared by handler
#
# _TIF_NEED_RESCHED is set, call schedule
-#
-io_reschedule:
- l %r1,BASED(.Lschedule)
- stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
- basr %r14,%r1 # call scheduler
- stnsm __SF_EMPTY(%r15),0xfc # disable I/O and ext. interrupts
+#
+io_reschedule:
+ l %r1,BASED(.Lschedule)
+ stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
+ basr %r14,%r1 # call scheduler
+ stnsm __SF_EMPTY(%r15),0xfc # disable I/O and ext. interrupts
tm __TI_flags+3(%r9),_TIF_WORK_INT
- bz BASED(io_leave) # there is no work to do
+ bz BASED(io_leave) # there is no work to do
b BASED(io_work_loop)
#
# _TIF_SIGPENDING or _TIF_RESTORE_SIGMASK is set, call do_signal
#
-io_sigpending:
- stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
- la %r2,SP_PTREGS(%r15) # load pt_regs
- l %r1,BASED(.Ldo_signal)
- basr %r14,%r1 # call do_signal
- stnsm __SF_EMPTY(%r15),0xfc # disable I/O and ext. interrupts
+io_sigpending:
+ stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
+ la %r2,SP_PTREGS(%r15) # load pt_regs
+ l %r1,BASED(.Ldo_signal)
+ basr %r14,%r1 # call do_signal
+ stnsm __SF_EMPTY(%r15),0xfc # disable I/O and ext. interrupts
b BASED(io_work_loop)
/*
* External interrupt handler routine
*/
- .globl ext_int_handler
+ .globl ext_int_handler
ext_int_handler:
STORE_TIMER __LC_ASYNC_ENTER_TIMER
stck __LC_INT_CLOCK
SAVE_ALL_BASE __LC_SAVE_AREA+16
- SAVE_ALL __LC_EXT_OLD_PSW,__LC_SAVE_AREA+16,0
+ SAVE_ALL_ASYNC __LC_EXT_OLD_PSW,__LC_SAVE_AREA+16
CREATE_STACK_FRAME __LC_EXT_OLD_PSW,__LC_SAVE_AREA+16
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
ext_no_vtime:
#endif
l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
- la %r2,SP_PTREGS(%r15) # address of register-save area
- lh %r3,__LC_EXT_INT_CODE # get interruption code
+ TRACE_IRQS_OFF
+ la %r2,SP_PTREGS(%r15) # address of register-save area
+ lh %r3,__LC_EXT_INT_CODE # get interruption code
l %r1,BASED(.Ldo_extint)
basr %r14,%r1
+ TRACE_IRQS_ON
b BASED(io_return)
__critical_end:
* Machine check handler routines
*/
- .globl mcck_int_handler
+ .globl mcck_int_handler
mcck_int_handler:
spt __LC_CPU_TIMER_SAVE_AREA # revalidate cpu timer
- mvc __LC_ASYNC_ENTER_TIMER(8),__LC_CPU_TIMER_SAVE_AREA
lm %r0,%r15,__LC_GPREGS_SAVE_AREA # revalidate gprs
SAVE_ALL_BASE __LC_SAVE_AREA+32
la %r12,__LC_MCK_OLD_PSW
- tm __LC_MCCK_CODE,0x80 # system damage?
+ tm __LC_MCCK_CODE,0x80 # system damage?
bo BASED(mcck_int_main) # yes -> rest of mcck code invalid
- tm __LC_MCCK_CODE+5,0x02 # stored cpu timer value valid?
- bo BASED(0f)
- spt __LC_LAST_UPDATE_TIMER # revalidate cpu timer
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
- mvc __LC_ASYNC_ENTER_TIMER(8),__LC_LAST_UPDATE_TIMER
- mvc __LC_SYNC_ENTER_TIMER(8),__LC_LAST_UPDATE_TIMER
- mvc __LC_EXIT_TIMER(8),__LC_LAST_UPDATE_TIMER
+ mvc __LC_SAVE_AREA+52(8),__LC_ASYNC_ENTER_TIMER
+ mvc __LC_ASYNC_ENTER_TIMER(8),__LC_CPU_TIMER_SAVE_AREA
+ tm __LC_MCCK_CODE+5,0x02 # stored cpu timer value valid?
+ bo BASED(1f)
+ la %r14,__LC_SYNC_ENTER_TIMER
+ clc 0(8,%r14),__LC_ASYNC_ENTER_TIMER
+ bl BASED(0f)
+ la %r14,__LC_ASYNC_ENTER_TIMER
+0: clc 0(8,%r14),__LC_EXIT_TIMER
+ bl BASED(0f)
+ la %r14,__LC_EXIT_TIMER
+0: clc 0(8,%r14),__LC_LAST_UPDATE_TIMER
+ bl BASED(0f)
+ la %r14,__LC_LAST_UPDATE_TIMER
+0: spt 0(%r14)
+ mvc __LC_ASYNC_ENTER_TIMER(8),0(%r14)
+1:
#endif
-0: tm __LC_MCCK_CODE+2,0x09 # mwp + ia of old psw valid?
+ tm __LC_MCCK_CODE+2,0x09 # mwp + ia of old psw valid?
bno BASED(mcck_int_main) # no -> skip cleanup critical
tm __LC_MCK_OLD_PSW+1,0x01 # test problem state bit
bnz BASED(mcck_int_main) # from user -> load async stack
l %r15,__LC_PANIC_STACK # load panic stack
0: CREATE_STACK_FRAME __LC_MCK_OLD_PSW,__LC_SAVE_AREA+32
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
- tm __LC_MCCK_CODE+2,0x08 # mwp of old psw valid?
+ tm __LC_MCCK_CODE+2,0x08 # mwp of old psw valid?
bno BASED(mcck_no_vtime) # no -> skip cleanup critical
- tm __LC_MCK_OLD_PSW+1,0x01 # interrupting from user ?
+ tm SP_PSW+1(%r15),0x01 # interrupting from user ?
bz BASED(mcck_no_vtime)
UPDATE_VTIME __LC_EXIT_TIMER,__LC_ASYNC_ENTER_TIMER,__LC_USER_TIMER
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
#endif
l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
la %r2,SP_PTREGS(%r15) # load pt_regs
- l %r1,BASED(.Ls390_mcck)
- basr %r14,%r1 # call machine check handler
- tm SP_PSW+1(%r15),0x01 # returning to user ?
+ l %r1,BASED(.Ls390_mcck)
+ basr %r14,%r1 # call machine check handler
+ tm SP_PSW+1(%r15),0x01 # returning to user ?
bno BASED(mcck_return)
- l %r1,__LC_KERNEL_STACK # switch to kernel stack
+ l %r1,__LC_KERNEL_STACK # switch to kernel stack
s %r1,BASED(.Lc_spsize)
mvc SP_PTREGS(__PT_SIZE,%r1),SP_PTREGS(%r15)
- xc __SF_BACKCHAIN(4,%r1),__SF_BACKCHAIN(%r1) # clear back chain
+ xc __SF_BACKCHAIN(4,%r1),__SF_BACKCHAIN(%r1) # clear back chain
lr %r15,%r1
stosm __SF_EMPTY(%r15),0x04 # turn dat on
tm __TI_flags+3(%r9),_TIF_MCCK_PENDING
bno BASED(mcck_return)
+ TRACE_IRQS_OFF
l %r1,BASED(.Ls390_handle_mcck)
basr %r14,%r1 # call machine check handler
+ TRACE_IRQS_ON
mcck_return:
- RESTORE_ALL __LC_RETURN_MCCK_PSW,0
+ mvc __LC_RETURN_MCCK_PSW(8),SP_PSW(%r15) # move return PSW
+ ni __LC_RETURN_MCCK_PSW+1,0xfd # clear wait state bit
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING
+ mvc __LC_ASYNC_ENTER_TIMER(8),__LC_SAVE_AREA+52
+ tm __LC_RETURN_MCCK_PSW+1,0x01 # returning to user ?
+ bno BASED(0f)
+ lm %r0,%r15,SP_R0(%r15) # load gprs 0-15
+ stpt __LC_EXIT_TIMER
+ lpsw __LC_RETURN_MCCK_PSW # back to caller
+0:
+#endif
+ lm %r0,%r15,SP_R0(%r15) # load gprs 0-15
+ lpsw __LC_RETURN_MCCK_PSW # back to caller
+
+ RESTORE_ALL __LC_RETURN_MCCK_PSW,0
#ifdef CONFIG_SMP
/*
* Restart interruption handler, kick starter for additional CPUs
*/
- .globl restart_int_handler
+ .globl restart_int_handler
restart_int_handler:
- l %r15,__LC_SAVE_AREA+60 # load ksp
- lctl %c0,%c15,__LC_CREGS_SAVE_AREA # get new ctl regs
- lam %a0,%a15,__LC_AREGS_SAVE_AREA
- lm %r6,%r15,__SF_GPRS(%r15) # load registers from clone
- stosm __SF_EMPTY(%r15),0x04 # now we can turn dat on
- basr %r14,0
- l %r14,restart_addr-.(%r14)
- br %r14 # branch to start_secondary
+ l %r15,__LC_SAVE_AREA+60 # load ksp
+ lctl %c0,%c15,__LC_CREGS_SAVE_AREA # get new ctl regs
+ lam %a0,%a15,__LC_AREGS_SAVE_AREA
+ lm %r6,%r15,__SF_GPRS(%r15) # load registers from clone
+ stosm __SF_EMPTY(%r15),0x04 # now we can turn dat on
+ basr %r14,0
+ l %r14,restart_addr-.(%r14)
+ br %r14 # branch to start_secondary
restart_addr:
- .long start_secondary
+ .long start_secondary
#else
/*
* If we do not run with SMP enabled, let the new CPU crash ...
*/
- .globl restart_int_handler
+ .globl restart_int_handler
restart_int_handler:
- basr %r1,0
+ basr %r1,0
restart_base:
- lpsw restart_crash-restart_base(%r1)
- .align 8
+ lpsw restart_crash-restart_base(%r1)
+ .align 8
restart_crash:
- .long 0x000a0000,0x00000000
+ .long 0x000a0000,0x00000000
restart_go:
#endif
be BASED(0f)
la %r1,__LC_SAVE_AREA+16
0: mvc SP_R12(16,%r15),0(%r1) # move %r12-%r15 to stack
- xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15) # clear back chain
+ xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15) # clear back chain
l %r1,BASED(1f) # branch to kernel_stack_overflow
- la %r2,SP_PTREGS(%r15) # load pt_regs
+ la %r2,SP_PTREGS(%r15) # load pt_regs
br %r1
-1: .long kernel_stack_overflow
+1: .long kernel_stack_overflow
#endif
cleanup_table_system_call:
.long sysc_leave + 0x80000000, sysc_work_loop + 0x80000000
cleanup_table_sysc_work_loop:
.long sysc_work_loop + 0x80000000, sysc_reschedule + 0x80000000
+cleanup_table_io_return:
+ .long io_return + 0x80000000, io_leave + 0x80000000
cleanup_table_io_leave:
.long io_leave + 0x80000000, io_done + 0x80000000
cleanup_table_io_work_loop:
bl BASED(0f)
clc 4(4,%r12),BASED(cleanup_table_sysc_work_loop+4)
bl BASED(cleanup_sysc_return)
+0:
+ clc 4(4,%r12),BASED(cleanup_table_io_return)
+ bl BASED(0f)
+ clc 4(4,%r12),BASED(cleanup_table_io_return+4)
+ bl BASED(cleanup_io_return)
0:
clc 4(4,%r12),BASED(cleanup_table_io_leave)
bl BASED(0f)
mvc __LC_SAVE_AREA(16),0(%r12)
0: st %r13,4(%r12)
st %r12,__LC_SAVE_AREA+48 # argh
- SAVE_ALL __LC_SVC_OLD_PSW,__LC_SAVE_AREA,1
+ SAVE_ALL_SYNC __LC_SVC_OLD_PSW,__LC_SAVE_AREA
CREATE_STACK_FRAME __LC_SVC_OLD_PSW,__LC_SAVE_AREA
l %r12,__LC_SAVE_AREA+48 # argh
st %r15,12(%r12)
cleanup_system_call_insn:
.long sysc_saveall + 0x80000000
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
- .long system_call + 0x80000000
- .long sysc_vtime + 0x80000000
- .long sysc_stime + 0x80000000
- .long sysc_update + 0x80000000
+ .long system_call + 0x80000000
+ .long sysc_vtime + 0x80000000
+ .long sysc_stime + 0x80000000
+ .long sysc_update + 0x80000000
#endif
cleanup_sysc_return:
/*
* Integer constants
*/
- .align 4
-.Lc_spsize: .long SP_SIZE
-.Lc_overhead: .long STACK_FRAME_OVERHEAD
-.Lc_pactive: .long PREEMPT_ACTIVE
-.Lnr_syscalls: .long NR_syscalls
-.L0x018: .short 0x018
-.L0x020: .short 0x020
-.L0x028: .short 0x028
-.L0x030: .short 0x030
-.L0x038: .short 0x038
-.Lc_1: .long 1
+ .align 4
+.Lc_spsize: .long SP_SIZE
+.Lc_overhead: .long STACK_FRAME_OVERHEAD
+.Lc_pactive: .long PREEMPT_ACTIVE
+.Lnr_syscalls: .long NR_syscalls
+.L0x018: .short 0x018
+.L0x020: .short 0x020
+.L0x028: .short 0x028
+.L0x030: .short 0x030
+.L0x038: .short 0x038
+.Lc_1: .long 1
/*
* Symbol constants
*/
-.Ls390_mcck: .long s390_do_machine_check
+.Ls390_mcck: .long s390_do_machine_check
.Ls390_handle_mcck:
- .long s390_handle_mcck
-.Lmck_old_psw: .long __LC_MCK_OLD_PSW
-.Ldo_IRQ: .long do_IRQ
-.Ldo_extint: .long do_extint
-.Ldo_signal: .long do_signal
-.Lhandle_per: .long do_single_step
-.Ljump_table: .long pgm_check_table
-.Lschedule: .long schedule
-.Lclone: .long sys_clone
-.Lexecve: .long sys_execve
-.Lfork: .long sys_fork
-.Lrt_sigreturn:.long sys_rt_sigreturn
+ .long s390_handle_mcck
+.Lmck_old_psw: .long __LC_MCK_OLD_PSW
+.Ldo_IRQ: .long do_IRQ
+.Ldo_extint: .long do_extint
+.Ldo_signal: .long do_signal
+.Lhandle_per: .long do_single_step
+.Ljump_table: .long pgm_check_table
+.Lschedule: .long schedule
+.Lclone: .long sys_clone
+.Lexecve: .long sys_execve
+.Lfork: .long sys_fork
+.Lrt_sigreturn: .long sys_rt_sigreturn
.Lrt_sigsuspend:
- .long sys_rt_sigsuspend
-.Lsigreturn: .long sys_sigreturn
-.Lsigsuspend: .long sys_sigsuspend
-.Lsigaltstack: .long sys_sigaltstack
-.Ltrace: .long syscall_trace
-.Lvfork: .long sys_vfork
-.Lschedtail: .long schedule_tail
-
+ .long sys_rt_sigsuspend
+.Lsigreturn: .long sys_sigreturn
+.Lsigsuspend: .long sys_sigsuspend
+.Lsigaltstack: .long sys_sigaltstack
+.Ltrace: .long syscall_trace
+.Lvfork: .long sys_vfork
+.Lschedtail: .long schedule_tail
+.Lsysc_table: .long sys_call_table
+#ifdef CONFIG_TRACE_IRQFLAGS
+.Ltrace_irq_on: .long trace_hardirqs_on
+.Ltrace_irq_off:
+ .long trace_hardirqs_off
+#endif
.Lcritical_start:
- .long __critical_start + 0x80000000
+ .long __critical_start + 0x80000000
.Lcritical_end:
- .long __critical_end + 0x80000000
+ .long __critical_end + 0x80000000
.Lcleanup_critical:
- .long cleanup_critical
+ .long cleanup_critical
+ .section .rodata, "a"
#define SYSCALL(esa,esame,emu) .long esa
- .globl sys_call_table
sys_call_table:
#include "syscalls.S"
#undef SYSCALL
-
git.openpandora.org / pandora-kernel.git / blobdiff