* R15 - kernel stack pointer
*/
- .macro SAVE_ALL_BASE savearea
- stm %r12,%r15,\savearea
- l %r13,__LC_SVC_NEW_PSW+4 # load &system_call to %r13
+ .macro SAVE_ALL_BASE psworg,savearea,sync
+ stm %r12,%r15,\savearea
+ l %r13,__LC_SVC_NEW_PSW+4 # load &system_call to %r13
.endm
- .macro SAVE_ALL psworg,savearea,sync
- la %r12,\psworg
+ .macro CLEANUP_SAVE_ALL_BASE psworg,savearea,sync
+ l %r1,SP_PSW+4(%r15)
+ cli 1(%r1),0xcf
+ jne 0f
+ mvc \savearea(16),SP_R12(%r15)
+0: st %r13,SP_R13(%r15)
+ .endm
+
+ .macro SAVE_ALL psworg,savearea,sync
.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
+ tm \psworg+1,0x01 # test problem state bit
+ bz BASED(1f) # skip stack setup save
+ l %r15,__LC_KERNEL_STACK # problem state -> load ksp
.else
- tm \psworg+1,0x01 # test problem state bit
- bnz BASED(1f) # from user -> load async stack
- clc \psworg+4(4),BASED(.Lcritical_end)
- bhe BASED(0f)
- clc \psworg+4(4),BASED(.Lcritical_start)
- bl BASED(0f)
- l %r14,BASED(.Lcleanup_critical)
- basr %r14,%r14
- tm 0(%r12),0x01 # retest problem state after cleanup
- bnz BASED(1f)
-0: l %r14,__LC_ASYNC_STACK # are we already on the async stack ?
- slr %r14,%r15
+ tm \psworg+1,0x01 # test problem state bit
+ bnz BASED(0f) # from user -> load async stack
+ l %r14,__LC_ASYNC_STACK # are we already on the async stack ?
+ slr %r14,%r15
sra %r14,13
- be BASED(2f)
-1: l %r15,__LC_ASYNC_STACK
+ be BASED(1f)
+0: l %r15,__LC_ASYNC_STACK
+ .endif
+1: s %r15,BASED(.Lc_spsize) # make room for registers & psw
+ l %r14,BASED(.L\psworg)
+ slr %r12,%r12
+ icm %r14,12,__LC_SVC_ILC
+ stm %r0,%r11,SP_R0(%r15) # store gprs 0-12 to kernel stack
+ st %r2,SP_ORIG_R2(%r15) # store original content of gpr 2
+ mvc SP_R12(16,%r15),\savearea # move R13-R15 to stack
+ mvc SP_PSW(8,%r15),\psworg # move user PSW to stack
+ st %r14,SP_ILC(%r15)
+ st %r12,0(%r15) # clear back chain
+ .endm
+
+ .macro CLEANUP_SAVE_ALL psworg,savearea,sync
+ l %r1,\savearea+12
+ .if \sync
+ tm \psworg+1,0x01
+ bz BASED(1f)
+ l %r1,__LC_KERNEL_STACK
+ .else
+ tm \psworg+1,0x01
+ bnz BASED(0f)
+ l %r0,__LC_ASYNC_STACK
+ slr %r0,%r1
+ sra %r0,13
+ bz BASED(1f)
+0: l %r1,__LC_ASYNC_STACK
.endif
-2: 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 %r2,SP_ORIG_R2(%r15) # store original content of gpr 2
- icm %r12,12,__LC_SVC_ILC
- stm %r0,%r11,SP_R0(%r15) # store gprs %r0-%r11 to kernel stack
- st %r12,SP_ILC(%r15)
- mvc SP_R12(16,%r15),\savearea # move %r12-%r15 to stack
- la %r12,0
- st %r12,0(%r15) # clear back chain
+1: s %r1,BASED(.Lc_spsize)
+ st %r1,SP_R15(%r15)
+ l %r0,BASED(.L\psworg)
+ xc SP_R12(4,%r15),SP_R12(%r15)
+ icm %r0,12,__LC_SVC_ILC
+ st %r0,SP_R14(%r15)
+ mvc SP_R0(48,%r1),SP_R0(%r15)
+ mvc SP_ORIG_R2(4,%r1),SP_R2(%r15)
+ mvc SP_R12(16,%r1),\savearea
+ mvc SP_PSW(8,%r1),\psworg
+ st %r0,SP_ILC(%r1)
+ xc 0(4,%r1),0(%r1)
.endm
- .macro RESTORE_ALL sync
- mvc __LC_RETURN_PSW(8),SP_PSW(%r15) # move user PSW to lowcore
- .if !\sync
- ni __LC_RETURN_PSW+1,0xfd # clear wait state bit
- .endif
- lm %r0,%r15,SP_R0(%r15) # load gprs 0-15 of user
- lpsw __LC_RETURN_PSW # back to caller
+ .macro RESTORE_ALL # system exit macro
+ mvc __LC_RETURN_PSW(8),SP_PSW(%r15) # move user PSW to lowcore
+ ni __LC_RETURN_PSW+1,0xfd # clear wait state bit
+ lm %r0,%r15,SP_R0(%r15) # load gprs 0-15 of user
+ lpsw __LC_RETURN_PSW # back to caller
+ .endm
+
+ .macro CLEANUP_RESTORE_ALL
+ l %r1,SP_PSW+4(%r15)
+ cli 0(%r1),0x82
+ jne 0f
+ mvc SP_PSW(8,%r15),__LC_RETURN_PSW
+ j 1f
+0: l %r1,SP_R15(%r15)
+ mvc SP_PSW(8,%r15),SP_PSW(%r1)
+ mvc SP_R0(64,%r15),SP_R0(%r1)
+1:
+ .endm
+
+ .macro GET_THREAD_INFO
+ l %r9,__LC_THREAD_INFO
+ .endm
+
+ .macro CHECK_CRITICAL
+ tm SP_PSW+1(%r15),0x01 # test problem state bit
+ bnz BASED(0f) # from user -> not critical
+ clc SP_PSW+4(4,%r15),BASED(.Lcritical_end)
+ jnl 0f
+ clc SP_PSW+4(4,%r15),BASED(.Lcritical_start)
+ jl 0f
+ l %r1,BASED(.Lcleanup_critical)
+ basr %r14,%r1
+0:
.endm
/*
.globl system_call
system_call:
- SAVE_ALL_BASE __LC_SAVE_AREA
+ SAVE_ALL_BASE __LC_SVC_OLD_PSW,__LC_SAVE_AREA,1
SAVE_ALL __LC_SVC_OLD_PSW,__LC_SAVE_AREA,1
lh %r7,0x8a # get svc number from lowcore
+sysc_enter:
+ GET_THREAD_INFO # load pointer to task_struct to R9
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
# svc 0: system call number in %r1
tm __TI_flags+3(%r9),_TIF_WORK_SVC
bnz BASED(sysc_work) # there is work to do (signals etc.)
sysc_leave:
- RESTORE_ALL 1
+ RESTORE_ALL
#
# recheck if there is more work to do
#
sysc_work_loop:
+ GET_THREAD_INFO # load pointer to task_struct to R9
tm __TI_flags+3(%r9),_TIF_WORK_SVC
bz BASED(sysc_leave) # there is no work to do
#
# _TIF_SIGPENDING is set, call do_signal
#
sysc_sigpending:
- ni __TI_flags+3(%r9),255-_TIF_SINGLE_STEP # clear TIF_SINGLE_STEP
la %r2,SP_PTREGS(%r15) # load pt_regs
sr %r3,%r3 # clear *oldset
l %r1,BASED(.Ldo_signal)
b BASED(sysc_do_restart) # restart svc
#
-# _TIF_SINGLE_STEP is set, call do_single_step
+# _TIF_SINGLE_STEP is set, call do_debugger_trap
#
sysc_singlestep:
ni __TI_flags+3(%r9),255-_TIF_SINGLE_STEP # clear TIF_SINGLE_STEP
la %r2,SP_PTREGS(%r15) # address of register-save area
l %r1,BASED(.Lhandle_per) # load adr. of per handler
la %r14,BASED(sysc_return) # load adr. of system return
- br %r1 # branch to do_single_step
+ br %r1 # branch to do_debugger_trap
__critical_end:
.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
+ GET_THREAD_INFO # load pointer to task_struct to R9
l %r1,BASED(.Lschedtail)
basr %r14,%r1
stosm 24(%r15),0x03 # reenable interrupts
* we just ignore the PER event (FIXME: is there anything we have to do
* for LPSW?).
*/
- SAVE_ALL_BASE __LC_SAVE_AREA
+ SAVE_ALL_BASE __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 __LC_PGM_OLD_PSW,__LC_SAVE_AREA,1
- l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
l %r3,__LC_PGM_ILC # load program interruption code
la %r8,0x7f
- nr %r8,%r3
-pgm_do_call:
l %r7,BASED(.Ljump_table)
+ nr %r8,%r3
sll %r8,2
+ GET_THREAD_INFO
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)
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
+ lm %r13,%r15,__LC_SAVE_AREA
lpsw 0x28
#
#
pgm_per_std:
SAVE_ALL __LC_PGM_OLD_PSW,__LC_SAVE_AREA,1
- l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
+ GET_THREAD_INFO
l %r1,__TI_task(%r9)
mvc __THREAD_per+__PER_atmid(2,%r1),__LC_PER_ATMID
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
+ la %r4,0x7f
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 ?
- b BASED(pgm_do_call)
+ nr %r4,%r3 # clear per-event-bit and ilc
+ be BASED(pgm_per_only) # only per or per+check ?
+ l %r1,BASED(.Ljump_table)
+ sll %r4,2
+ l %r1,0(%r4,%r1) # load address of handler routine
+ la %r2,SP_PTREGS(%r15) # address of register-save area
+ basr %r14,%r1 # branch to interrupt-handler
+pgm_per_only:
+ la %r2,SP_PTREGS(15) # address of register-save area
+ l %r1,BASED(.Lhandle_per) # load adr. of per handler
+ la %r14,BASED(sysc_return) # load adr. of system return
+ br %r1 # branch to do_debugger_trap
#
# it was a single stepped SVC that is causing all the trouble
pgm_svcper:
SAVE_ALL __LC_SVC_OLD_PSW,__LC_SAVE_AREA,1
lh %r7,0x8a # get svc number from lowcore
- l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
+ GET_THREAD_INFO # load pointer to task_struct to R9
l %r1,__TI_task(%r9)
mvc __THREAD_per+__PER_atmid(2,%r1),__LC_PER_ATMID
mvc __THREAD_per+__PER_address(4,%r1),__LC_PER_ADDRESS
.globl io_int_handler
io_int_handler:
- stck __LC_INT_CLOCK
- SAVE_ALL_BASE __LC_SAVE_AREA+16
+ SAVE_ALL_BASE __LC_IO_OLD_PSW,__LC_SAVE_AREA+16,0
SAVE_ALL __LC_IO_OLD_PSW,__LC_SAVE_AREA+16,0
- l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
+ stck __LC_INT_CLOCK
+ CHECK_CRITICAL
+ GET_THREAD_INFO # load pointer to task_struct to R9
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
tm __TI_flags+3(%r9),_TIF_WORK_INT
bnz BASED(io_work) # there is work to do (signals etc.)
io_leave:
- RESTORE_ALL 0
+ RESTORE_ALL
#ifdef CONFIG_PREEMPT
io_preempt:
l %r1,BASED(.Lschedule)
basr %r14,%r1 # call schedule
stnsm 24(%r15),0xfc # disable I/O and ext. interrupts
+ GET_THREAD_INFO # load pointer to task_struct to R9
xc __TI_precount(4,%r9),__TI_precount(%r9)
b BASED(io_resume_loop)
#endif
stosm 24(%r15),0x03 # reenable interrupts
basr %r14,%r1 # call scheduler
stnsm 24(%r15),0xfc # disable I/O and ext. interrupts
+ GET_THREAD_INFO # load pointer to task_struct to R9
tm __TI_flags+3(%r9),_TIF_WORK_INT
bz BASED(io_leave) # there is no work to do
b BASED(io_work_loop)
.globl ext_int_handler
ext_int_handler:
- stck __LC_INT_CLOCK
- SAVE_ALL_BASE __LC_SAVE_AREA+16
+ SAVE_ALL_BASE __LC_EXT_OLD_PSW,__LC_SAVE_AREA+16,0
SAVE_ALL __LC_EXT_OLD_PSW,__LC_SAVE_AREA+16,0
- l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
+ stck __LC_INT_CLOCK
+ CHECK_CRITICAL
+ GET_THREAD_INFO # load pointer to task_struct to R9
la %r2,SP_PTREGS(%r15) # address of register-save area
lh %r3,__LC_EXT_INT_CODE # get interruption code
l %r1,BASED(.Ldo_extint)
.globl mcck_int_handler
mcck_int_handler:
- SAVE_ALL_BASE __LC_SAVE_AREA+32
+ SAVE_ALL_BASE __LC_MCK_OLD_PSW,__LC_SAVE_AREA+32,0
SAVE_ALL __LC_MCK_OLD_PSW,__LC_SAVE_AREA+32,0
l %r1,BASED(.Ls390_mcck)
basr %r14,%r1 # call machine check handler
mcck_return:
- RESTORE_ALL 0
+ RESTORE_ALL
#ifdef CONFIG_SMP
/*
restart_go:
#endif
-cleanup_table_system_call:
- .long system_call + 0x80000000, sysc_do_svc + 0x80000000
-cleanup_table_sysc_return:
- .long sysc_return + 0x80000000, sysc_leave + 0x80000000
-cleanup_table_sysc_leave:
- .long sysc_leave + 0x80000000, sysc_work_loop + 0x80000000
-cleanup_table_sysc_work_loop:
- .long sysc_work_loop + 0x80000000, sysc_reschedule + 0x80000000
+cleanup_table:
+ .long system_call, sysc_enter, cleanup_sysc_enter
+ .long sysc_return, sysc_leave, cleanup_sysc_return
+ .long sysc_leave, sysc_work_loop, cleanup_sysc_leave
+ .long sysc_work_loop, sysc_reschedule, cleanup_sysc_return
+cleanup_table_entries=(.-cleanup_table) / 12
cleanup_critical:
- clc 4(4,%r12),BASED(cleanup_table_system_call)
- bl BASED(0f)
- clc 4(4,%r12),BASED(cleanup_table_system_call+4)
- bl BASED(cleanup_system_call)
-0:
- clc 4(4,%r12),BASED(cleanup_table_sysc_return)
- bl BASED(0f)
- clc 4(4,%r12),BASED(cleanup_table_sysc_return+4)
- bl BASED(cleanup_sysc_return)
-0:
- clc 4(4,%r12),BASED(cleanup_table_sysc_leave)
- bl BASED(0f)
- clc 4(4,%r12),BASED(cleanup_table_sysc_leave+4)
- bl BASED(cleanup_sysc_leave)
-0:
- clc 4(4,%r12),BASED(cleanup_table_sysc_work_loop)
- bl BASED(0f)
- clc 4(4,%r12),BASED(cleanup_table_sysc_work_loop+4)
- bl BASED(cleanup_sysc_leave)
-0:
+ lhi %r0,cleanup_table_entries
+ la %r1,BASED(cleanup_table)
+ l %r2,SP_PSW+4(%r15)
+ la %r2,0(%r2)
+cleanup_loop:
+ cl %r2,0(%r1)
+ bl BASED(cleanup_cont)
+ cl %r2,4(%r1)
+ bl BASED(cleanup_found)
+cleanup_cont:
+ la %r1,12(%r1)
+ bct %r0,BASED(cleanup_loop)
br %r14
+cleanup_found:
+ l %r1,8(%r1)
+ br %r1
-cleanup_system_call:
- mvc __LC_RETURN_PSW(4),0(%r12)
- clc 4(4,%r12),BASED(cleanup_table_system_call)
- bne BASED(0f)
- mvc __LC_SAVE_AREA(16),__LC_SAVE_AREA+16
-0: st %r13,__LC_SAVE_AREA+20
- SAVE_ALL __LC_SVC_OLD_PSW,__LC_SAVE_AREA,1
- st %r15,__LC_SAVE_AREA+28
- lh %r7,0x8a
- mvc __LC_RETURN_PSW+4(4),BASED(cleanup_table_system_call+4)
- la %r12,__LC_RETURN_PSW
+cleanup_sysc_enter:
+ CLEANUP_SAVE_ALL_BASE __LC_SVC_OLD_PSW,__LC_SAVE_AREA,1
+ CLEANUP_SAVE_ALL __LC_SVC_OLD_PSW,__LC_SAVE_AREA,1
+ lh %r0,0x8a
+ st %r0,SP_R7(%r15)
+ la %r1,BASED(sysc_enter)
+ o %r1,BASED(.Lamode)
+ st %r1,SP_PSW+4(%r15)
br %r14
cleanup_sysc_return:
- mvc __LC_RETURN_PSW(4),0(%r12)
- mvc __LC_RETURN_PSW+4(4),BASED(cleanup_table_sysc_return)
- la %r12,__LC_RETURN_PSW
+ la %r1,BASED(sysc_return)
+ o %r1,BASED(.Lamode)
+ st %r1,SP_PSW+4(%r15)
br %r14
cleanup_sysc_leave:
- clc 4(4,%r12),BASED(cleanup_sysc_leave_lpsw)
- be BASED(0f)
- mvc __LC_RETURN_PSW(8),SP_PSW(%r15)
- mvc __LC_SAVE_AREA+16(16),SP_R12(%r15)
- lm %r0,%r11,SP_R0(%r15)
- l %r15,SP_R15(%r15)
-0: la %r12,__LC_RETURN_PSW
+ CLEANUP_RESTORE_ALL
br %r14
-cleanup_sysc_leave_lpsw:
- .long sysc_leave + 10 + 0x80000000
/*
* Integer constants
.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
+.L0x018: .long 0x018
+.L0x020: .long 0x020
+.L0x028: .long 0x028
+.L0x030: .long 0x030
+.L0x038: .long 0x038
+.Lamode: .long 0x80000000
/*
* Symbol constants
.Ldo_extint: .long do_extint
.Ldo_signal: .long do_signal
.Ldo_softirq: .long do_softirq
-.Lhandle_per: .long do_single_step
+.Lhandle_per: .long do_debugger_trap
.Ljump_table: .long pgm_check_table
.Lschedule: .long schedule
.Lclone: .long sys_clone
git://git.onelab.eu / linux-2.6.git / blobdiff