Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 286 insertions, 0 deletions

diff --git a/include/asm-m68knommu/system.h b/include/asm-m68knommu/system.h
new file mode 100644
index 000000000000..c341b66c147b
--- /dev/null
+++ b/include/asm-m68knommu/system.h
@@ -0,0 +1,286 @@
+#ifndef _M68KNOMMU_SYSTEM_H
+#define _M68KNOMMU_SYSTEM_H
+
+#include <linux/config.h> /* get configuration macros */
+#include <linux/linkage.h>
+#include <asm/segment.h>
+#include <asm/entry.h>
+
+/*
+ * switch_to(n) should switch tasks to task ptr, first checking that
+ * ptr isn't the current task, in which case it does nothing.  This
+ * also clears the TS-flag if the task we switched to has used the
+ * math co-processor latest.
+ */
+/*
+ * switch_to() saves the extra registers, that are not saved
+ * automatically by SAVE_SWITCH_STACK in resume(), ie. d0-d5 and
+ * a0-a1. Some of these are used by schedule() and its predecessors
+ * and so we might get see unexpected behaviors when a task returns
+ * with unexpected register values.
+ *
+ * syscall stores these registers itself and none of them are used
+ * by syscall after the function in the syscall has been called.
+ *
+ * Beware that resume now expects *next to be in d1 and the offset of
+ * tss to be in a1. This saves a few instructions as we no longer have
+ * to push them onto the stack and read them back right after.
+ *
+ * 02/17/96 - Jes Sorensen (jds@kom.auc.dk)
+ *
+ * Changed 96/09/19 by Andreas Schwab
+ * pass prev in a0, next in a1, offset of tss in d1, and whether
+ * the mm structures are shared in d2 (to avoid atc flushing).
+ */
+asmlinkage void resume(void);
+#define switch_to(prev,next,last)				\
+{								\
+  void *_last;							\
+  __asm__ __volatile__(						\
+  	"movel	%1, %%a0\n\t"					\
+	"movel	%2, %%a1\n\t"					\
+	"jbsr resume\n\t"					\
+	"movel	%%d1, %0\n\t"					\
+       : "=d" (_last)						\
+       : "d" (prev), "d" (next)					\
+       : "cc", "d0", "d1", "d2", "d3", "d4", "d5", "a0", "a1");	\
+  (last) = _last;						\
+}
+
+#ifdef CONFIG_COLDFIRE
+#define local_irq_enable() __asm__ __volatile__ (		\
+	"move %/sr,%%d0\n\t"					\
+	"andi.l #0xf8ff,%%d0\n\t"				\
+	"move %%d0,%/sr\n"					\
+	: /* no outputs */					\
+	:							\
+        : "cc", "%d0", "memory")
+#define local_irq_disable() __asm__ __volatile__ (		\
+	"move %/sr,%%d0\n\t"					\
+	"ori.l  #0x0700,%%d0\n\t"				\
+	"move %%d0,%/sr\n"					\
+	: /* no inputs */					\
+	:							\
+	: "cc", "%d0", "memory")
+#else
+
+/* portable version */ /* FIXME - see entry.h*/
+#define ALLOWINT 0xf8ff
+
+#define local_irq_enable() asm volatile ("andiw %0,%%sr": : "i" (ALLOWINT) : "memory")
+#define local_irq_disable() asm volatile ("oriw  #0x0700,%%sr": : : "memory")
+#endif
+
+#define local_save_flags(x) asm volatile ("movew %%sr,%0":"=d" (x) : : "memory")
+#define local_irq_restore(x) asm volatile ("movew %0,%%sr": :"d" (x) : "memory")
+
+/* For spinlocks etc */
+#define local_irq_save(x) do { local_save_flags(x); local_irq_disable(); } while (0)
+
+#define	irqs_disabled()			\
+({					\
+	unsigned long flags;		\
+	local_save_flags(flags);	\
+	((flags & 0x0700) == 0x0700);	\
+})
+
+#define iret() __asm__ __volatile__ ("rte": : :"memory", "sp", "cc")
+
+/*
+ * Force strict CPU ordering.
+ * Not really required on m68k...
+ */
+#define nop()  asm volatile ("nop"::)
+#define mb()   asm volatile (""   : : :"memory")
+#define rmb()  asm volatile (""   : : :"memory")
+#define wmb()  asm volatile (""   : : :"memory")
+#define set_rmb(var, value)    do { xchg(&var, value); } while (0)
+#define set_mb(var, value)     set_rmb(var, value)
+#define set_wmb(var, value)    do { var = value; wmb(); } while (0)
+
+#ifdef CONFIG_SMP
+#define smp_mb()	mb()
+#define smp_rmb()	rmb()
+#define smp_wmb()	wmb()
+#define smp_read_barrier_depends()	read_barrier_depends()
+#else
+#define smp_mb()	barrier()
+#define smp_rmb()	barrier()
+#define smp_wmb()	barrier()
+#define smp_read_barrier_depends()	do { } while(0)
+#endif
+
+#define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))
+#define tas(ptr) (xchg((ptr),1))
+
+struct __xchg_dummy { unsigned long a[100]; };
+#define __xg(x) ((volatile struct __xchg_dummy *)(x))
+
+#ifndef CONFIG_RMW_INSNS
+static inline unsigned long __xchg(unsigned long x, volatile void * ptr, int size)
+{
+  unsigned long tmp, flags;
+
+  local_irq_save(flags);
+
+  switch (size) {
+  case 1:
+    __asm__ __volatile__
+    ("moveb %2,%0\n\t"
+     "moveb %1,%2"
+    : "=&d" (tmp) : "d" (x), "m" (*__xg(ptr)) : "memory");
+    break;
+  case 2:
+    __asm__ __volatile__
+    ("movew %2,%0\n\t"
+     "movew %1,%2"
+    : "=&d" (tmp) : "d" (x), "m" (*__xg(ptr)) : "memory");
+    break;
+  case 4:
+    __asm__ __volatile__
+    ("movel %2,%0\n\t"
+     "movel %1,%2"
+    : "=&d" (tmp) : "d" (x), "m" (*__xg(ptr)) : "memory");
+    break;
+  }
+  local_irq_restore(flags);
+  return tmp;
+}
+#else
+static inline unsigned long __xchg(unsigned long x, volatile void * ptr, int size)
+{
+	switch (size) {
+	    case 1:
+		__asm__ __volatile__
+			("moveb %2,%0\n\t"
+			 "1:\n\t"
+			 "casb %0,%1,%2\n\t"
+			 "jne 1b"
+			 : "=&d" (x) : "d" (x), "m" (*__xg(ptr)) : "memory");
+		break;
+	    case 2:
+		__asm__ __volatile__
+			("movew %2,%0\n\t"
+			 "1:\n\t"
+			 "casw %0,%1,%2\n\t"
+			 "jne 1b"
+			 : "=&d" (x) : "d" (x), "m" (*__xg(ptr)) : "memory");
+		break;
+	    case 4:
+		__asm__ __volatile__
+			("movel %2,%0\n\t"
+			 "1:\n\t"
+			 "casl %0,%1,%2\n\t"
+			 "jne 1b"
+			 : "=&d" (x) : "d" (x), "m" (*__xg(ptr)) : "memory");
+		break;
+	}
+	return x;
+}
+#endif
+
+/*
+ * Atomic compare and exchange.  Compare OLD with MEM, if identical,
+ * store NEW in MEM.  Return the initial value in MEM.  Success is
+ * indicated by comparing RETURN with OLD.
+ */
+#define __HAVE_ARCH_CMPXCHG	1
+
+static __inline__ unsigned long
+cmpxchg(volatile int *p, int old, int new)
+{
+	unsigned long flags;
+	int prev;
+
+	local_irq_save(flags);
+	if ((prev = *p) == old)
+		*p = new;
+	local_irq_restore(flags);
+	return(prev);
+}
+
+
+#ifdef CONFIG_M68332
+#define HARD_RESET_NOW() ({		\
+        local_irq_disable();		\
+        asm("				\
+	movew   #0x0000, 0xfffa6a;	\
+        reset;				\
+        /*movew #0x1557, 0xfffa44;*/	\
+        /*movew #0x0155, 0xfffa46;*/	\
+        moveal #0, %a0;			\
+        movec %a0, %vbr;		\
+        moveal 0, %sp;			\
+        moveal 4, %a0;			\
+        jmp (%a0);			\
+        ");				\
+})
+#endif
+
+#if defined( CONFIG_M68328 ) || defined( CONFIG_M68EZ328 ) || \
+	defined (CONFIG_M68360) || defined( CONFIG_M68VZ328 )
+#define HARD_RESET_NOW() ({		\
+        local_irq_disable();		\
+        asm("				\
+        moveal #0x10c00000, %a0;	\
+        moveb #0, 0xFFFFF300;		\
+        moveal 0(%a0), %sp;		\
+        moveal 4(%a0), %a0;		\
+        jmp (%a0);			\
+        ");				\
+})
+#endif
+
+#ifdef CONFIG_COLDFIRE
+#if defined(CONFIG_M5272) && defined(CONFIG_NETtel)
+/*
+ *	Need to account for broken early mask of 5272 silicon. So don't
+ *	jump through the original start address. Jump strait into the
+ *	known start of the FLASH code.
+ */
+#define HARD_RESET_NOW() ({		\
+        asm("				\
+	movew #0x2700, %sr;		\
+        jmp 0xf0000400;			\
+        ");				\
+})
+#elif defined(CONFIG_NETtel) || defined(CONFIG_eLIA) || defined(CONFIG_DISKtel) || defined(CONFIG_SECUREEDGEMP3) || defined(CONFIG_CLEOPATRA)
+#define HARD_RESET_NOW() ({		\
+        asm("				\
+	movew #0x2700, %sr;		\
+	moveal #0x10000044, %a0;	\
+	movel #0xffffffff, (%a0);	\
+	moveal #0x10000001, %a0;	\
+	moveb #0x00, (%a0);		\
+        moveal #0xf0000004, %a0;	\
+        moveal (%a0), %a0;		\
+        jmp (%a0);			\
+        ");				\
+})
+#elif defined(CONFIG_M528x)
+/*
+ * The MCF528x has a bit (SOFTRST) in memory (Reset Control Register RCR),
+ * that when set, resets the MCF528x.
+ */
+#define HARD_RESET_NOW() \
+({						\
+	unsigned char volatile *reset;		\
+	asm("move.w	#0x2700, %sr");		\
+	reset = ((volatile unsigned short *)(MCF_IPSBAR + 0x110000));	\
+	while(1)				\
+	*reset |= (0x01 << 7);\
+})
+#else
+#define HARD_RESET_NOW() ({		\
+        asm("				\
+	movew #0x2700, %sr;		\
+        moveal #0x4, %a0;		\
+        moveal (%a0), %a0;		\
+        jmp (%a0);			\
+        ");				\
+})
+#endif
+#endif
+#define arch_align_stack(x) (x)
+
+#endif /* _M68KNOMMU_SYSTEM_H */