X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Fasm-s390%2Fprocessor.h;h=c5cbc4bd8414e12c571982cb5c5d0f85bec31406;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=7ef8112504d346257d3817f9711db4b6dc4ed273;hpb=5273a3df6485dc2ad6aa7ddd441b9a21970f003b;p=linux-2.6.git

diff --git a/include/asm-s390/processor.h b/include/asm-s390/processor.h
index 7ef811250..c5cbc4bd8 100644
--- a/include/asm-s390/processor.h
+++ b/include/asm-s390/processor.h
@@ -63,16 +63,19 @@ extern struct task_struct *last_task_used_math;
 
 # define TASK_SIZE		(0x80000000UL)
 # define TASK_UNMAPPED_BASE	(TASK_SIZE / 2)
+# define DEFAULT_TASK_SIZE	(0x80000000UL)
 
 #else /* __s390x__ */
 
-# define TASK_SIZE		(0x40000000000UL)
-# define TASK31_SIZE		(0x80000000UL)
-# define TASK_UNMAPPED_BASE	(test_thread_flag(TIF_31BIT) ? \
-					(TASK31_SIZE / 2) : (TASK_SIZE / 2))
+# define TASK_SIZE		(test_thread_flag(TIF_31BIT) ? \
+					(0x80000000UL) : (0x40000000000UL))
+# define TASK_UNMAPPED_BASE	(TASK_SIZE / 2)
+# define DEFAULT_TASK_SIZE	(0x40000000000UL)
 
 #endif /* __s390x__ */
 
+#define HAVE_ARCH_PICK_MMAP_LAYOUT
+
 typedef struct {
         __u32 ar4;
 } mm_segment_t;
@@ -98,6 +101,25 @@ struct thread_struct {
 
 typedef struct thread_struct thread_struct;
 
+/*
+ * Stack layout of a C stack frame.
+ */
+#ifndef __PACK_STACK
+struct stack_frame {
+	unsigned long back_chain;
+	unsigned long empty1[5];
+	unsigned long gprs[10];
+	unsigned int  empty2[8];
+};
+#else
+struct stack_frame {
+	unsigned long empty1[5];
+	unsigned int  empty2[8];
+	unsigned long gprs[10];
+	unsigned long back_chain;
+};
+#endif
+
 #define ARCH_MIN_TASKALIGN	8
 
 #ifndef __s390x__
@@ -169,10 +191,10 @@ extern void show_registers(struct pt_regs *regs);
 extern void show_trace(struct task_struct *task, unsigned long *sp);
 
 unsigned long get_wchan(struct task_struct *p);
-#define __KSTK_PTREGS(tsk) ((struct pt_regs *) \
-        ((unsigned long) tsk->thread_info + THREAD_SIZE - sizeof(struct pt_regs)))
-#define KSTK_EIP(tsk)	(__KSTK_PTREGS(tsk)->psw.addr)
-#define KSTK_ESP(tsk)	(__KSTK_PTREGS(tsk)->gprs[15])
+#define task_pt_regs(tsk) ((struct pt_regs *) \
+        (task_stack_page(tsk) + THREAD_SIZE) - 1)
+#define KSTK_EIP(tsk)	(task_pt_regs(tsk)->psw.addr)
+#define KSTK_ESP(tsk)	(task_pt_regs(tsk)->gprs[15])
 
 /*
  * Give up the time slice of the virtual PU.
@@ -181,9 +203,24 @@ unsigned long get_wchan(struct task_struct *p);
 # define cpu_relax()	asm volatile ("diag 0,0,68" : : : "memory")
 #else /* __s390x__ */
 # define cpu_relax() \
-	asm volatile ("ex 0,%0" : : "i" (__LC_DIAG44_OPCODE) : "memory")
+	do { \
+		if (MACHINE_HAS_DIAG44) \
+			asm volatile ("diag 0,0,68" : : : "memory"); \
+	} while (0)
 #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.
@@ -192,8 +229,8 @@ 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__
@@ -219,30 +256,8 @@ 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;
-#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);
 }
 
 /*
@@ -251,13 +266,11 @@ 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
@@ -279,7 +292,7 @@ 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 */
@@ -311,11 +324,21 @@ 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__ */
 }
 
+/*
+ * CPU idle notifier chain.
+ */
+#define CPU_IDLE	0
+#define CPU_NOT_IDLE	1
+
+struct notifier_block;
+int register_idle_notifier(struct notifier_block *nb);
+int unregister_idle_notifier(struct notifier_block *nb);
+
 #endif
 
 #endif                                 /* __ASM_S390_PROCESSOR_H           */