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Diffstat (limited to 'include/asm-s390/processor.h')
-rw-r--r--include/asm-s390/processor.h52
1 files changed, 20 insertions, 32 deletions
diff --git a/include/asm-s390/processor.h b/include/asm-s390/processor.h
index fb46e9090b5..8bd14de69e3 100644
--- a/include/asm-s390/processor.h
+++ b/include/asm-s390/processor.h
@@ -207,6 +207,18 @@ unsigned long get_wchan(struct task_struct *p);
#endif /* __s390x__ */
/*
+ * Set PSW to specified value.
+ */
+static inline void __load_psw(psw_t psw)
+{
+#ifndef __s390x__
+ asm volatile ("lpsw 0(%0)" : : "a" (&psw), "m" (psw) : "cc" );
+#else
+ asm volatile ("lpswe 0(%0)" : : "a" (&psw), "m" (psw) : "cc" );
+#endif
+}
+
+/*
* Set PSW mask to specified value, while leaving the
* PSW addr pointing to the next instruction.
*/
@@ -214,8 +226,8 @@ unsigned long get_wchan(struct task_struct *p);
static inline void __load_psw_mask (unsigned long mask)
{
unsigned long addr;
-
psw_t psw;
+
psw.mask = mask;
#ifndef __s390x__
@@ -241,30 +253,8 @@ static inline void __load_psw_mask (unsigned long mask)
*/
static inline void enabled_wait(void)
{
- unsigned long reg;
- psw_t wait_psw;
-
- wait_psw.mask = PSW_BASE_BITS | PSW_MASK_IO | PSW_MASK_EXT |
- PSW_MASK_MCHECK | PSW_MASK_WAIT | PSW_DEFAULT_KEY;
-#ifndef __s390x__
- asm volatile (
- " basr %0,0\n"
- "0: la %0,1f-0b(%0)\n"
- " st %0,4(%1)\n"
- " oi 4(%1),0x80\n"
- " lpsw 0(%1)\n"
- "1:"
- : "=&a" (reg) : "a" (&wait_psw), "m" (wait_psw)
- : "memory", "cc" );
-#else /* __s390x__ */
- asm volatile (
- " larl %0,0f\n"
- " stg %0,8(%1)\n"
- " lpswe 0(%1)\n"
- "0:"
- : "=&a" (reg) : "a" (&wait_psw), "m" (wait_psw)
- : "memory", "cc" );
-#endif /* __s390x__ */
+ __load_psw_mask(PSW_BASE_BITS | PSW_MASK_IO | PSW_MASK_EXT |
+ PSW_MASK_MCHECK | PSW_MASK_WAIT | PSW_DEFAULT_KEY);
}
/*
@@ -273,13 +263,11 @@ static inline void enabled_wait(void)
static inline void disabled_wait(unsigned long code)
{
- char psw_buffer[2*sizeof(psw_t)];
unsigned long ctl_buf;
- psw_t *dw_psw = (psw_t *)(((unsigned long) &psw_buffer+sizeof(psw_t)-1)
- & -sizeof(psw_t));
+ psw_t dw_psw;
- dw_psw->mask = PSW_BASE_BITS | PSW_MASK_WAIT;
- dw_psw->addr = code;
+ dw_psw.mask = PSW_BASE_BITS | PSW_MASK_WAIT;
+ dw_psw.addr = code;
/*
* Store status and then load disabled wait psw,
* the processor is dead afterwards
@@ -301,7 +289,7 @@ static inline void disabled_wait(unsigned long code)
" oi 0x1c0,0x10\n" /* fake protection bit */
" lpsw 0(%1)"
: "=m" (ctl_buf)
- : "a" (dw_psw), "a" (&ctl_buf), "m" (dw_psw) : "cc" );
+ : "a" (&dw_psw), "a" (&ctl_buf), "m" (dw_psw) : "cc" );
#else /* __s390x__ */
asm volatile (" stctg 0,0,0(%2)\n"
" ni 4(%2),0xef\n" /* switch off protection */
@@ -333,7 +321,7 @@ static inline void disabled_wait(unsigned long code)
" oi 0x384(1),0x10\n" /* fake protection bit */
" lpswe 0(%1)"
: "=m" (ctl_buf)
- : "a" (dw_psw), "a" (&ctl_buf),
+ : "a" (&dw_psw), "a" (&ctl_buf),
"m" (dw_psw) : "cc", "0", "1");
#endif /* __s390x__ */
}