summaryrefslogtreecommitdiff
path: root/arch/s390/kernel/switch_cpu64.S
diff options
context:
space:
mode:
Diffstat (limited to 'arch/s390/kernel/switch_cpu64.S')
-rw-r--r--arch/s390/kernel/switch_cpu64.S51
1 files changed, 0 insertions, 51 deletions
diff --git a/arch/s390/kernel/switch_cpu64.S b/arch/s390/kernel/switch_cpu64.S
deleted file mode 100644
index fcc42d799e41..000000000000
--- a/arch/s390/kernel/switch_cpu64.S
+++ /dev/null
@@ -1,51 +0,0 @@
-/*
- * 64-bit switch cpu code
- *
- * Copyright IBM Corp. 2009
- *
- */
-
-#include <linux/linkage.h>
-#include <asm/asm-offsets.h>
-#include <asm/ptrace.h>
-
-# smp_switch_to_cpu switches to destination cpu and executes the passed function
-# Parameter: %r2 - function to call
-# %r3 - function parameter
-# %r4 - stack poiner
-# %r5 - current cpu
-# %r6 - destination cpu
-
- .section .text
-ENTRY(smp_switch_to_cpu)
- stmg %r6,%r15,__SF_GPRS(%r15)
- lgr %r1,%r15
- aghi %r15,-STACK_FRAME_OVERHEAD
- stg %r1,__SF_BACKCHAIN(%r15)
- larl %r1,.gprregs
- stmg %r0,%r15,0(%r1)
-1: sigp %r0,%r6,__SIGP_RESTART /* start destination CPU */
- brc 2,1b /* busy, try again */
-2: sigp %r0,%r5,__SIGP_STOP /* stop current CPU */
- brc 2,2b /* busy, try again */
-3: j 3b
-
-ENTRY(smp_restart_cpu)
- larl %r1,.gprregs
- lmg %r0,%r15,0(%r1)
-1: sigp %r0,%r5,__SIGP_SENSE /* Wait for calling CPU */
- brc 10,1b /* busy, accepted (status 0), running */
- tmll %r0,0x40 /* Test if calling CPU is stopped */
- jz 1b
- ltgr %r4,%r4 /* New stack ? */
- jz 1f
- lgr %r15,%r4
-1: lgr %r14,%r2 /* r14: Function to call */
- lgr %r2,%r3 /* r2 : Parameter for function*/
- basr %r14,%r14 /* Call function */
-
- .section .data,"aw",@progbits
-.gprregs:
- .rept 16
- .quad 0
- .endr