sparc, sparc64: use arch/sparc/include

The majority of this patch was created by the following script:

***
ASM=arch/sparc/include/asm
mkdir -p $ASM
git mv include/asm-sparc64/ftrace.h $ASM
git rm include/asm-sparc64/*
git mv include/asm-sparc/* $ASM
sed -ie 's/asm-sparc64/asm/g' $ASM/*
sed -ie 's/asm-sparc/asm/g' $ASM/*
***

The rest was an update of the top-level Makefile to use sparc
for header files when sparc64 is being build.
And a small fixlet to pick up the correct unistd.h from
sparc64 code.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

arch/sparc/include/asm/kdebug_32.h

@@ -0,0 +1,73 @@
+/*
+ * kdebug.h:  Defines and definitions for debugging the Linux kernel
+ *            under various kernel debuggers.
+ *
+ * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
+ */
+#ifndef _SPARC_KDEBUG_H
+#define _SPARC_KDEBUG_H
+
+#include <asm/openprom.h>
+#include <asm/vaddrs.h>
+
+/* Breakpoints are enter through trap table entry 126.  So in sparc assembly
+ * if you want to drop into the debugger you do:
+ *
+ * t DEBUG_BP_TRAP
+ */
+
+#define DEBUG_BP_TRAP     126
+
+#ifndef __ASSEMBLY__
+/* The debug vector is passed in %o1 at boot time.  It is a pointer to
+ * a structure in the debuggers address space.  Here is its format.
+ */
+
+typedef unsigned int (*debugger_funct)(void);
+
+struct kernel_debug {
+	/* First the entry point into the debugger.  You jump here
+	 * to give control over to the debugger.
+	 */
+	unsigned long kdebug_entry;
+	unsigned long kdebug_trapme;   /* Figure out later... */
+	/* The following is the number of pages that the debugger has
+	 * taken from to total pool.
+	 */
+	unsigned long *kdebug_stolen_pages;
+	/* Ok, after you remap yourself and/or change the trap table
+	 * from what you were left with at boot time you have to call
+	 * this synchronization function so the debugger can check out
+	 * what you have done.
+	 */
+	debugger_funct teach_debugger;
+}; /* I think that is it... */
+
+extern struct kernel_debug *linux_dbvec;
+
+/* Use this macro in C-code to enter the debugger. */
+static inline void sp_enter_debugger(void)
+{
+	__asm__ __volatile__("jmpl %0, %%o7\n\t"
+			     "nop\n\t" : :
+			     "r" (linux_dbvec) : "o7", "memory");
+}
+
+#define SP_ENTER_DEBUGGER do { \
+	     if((linux_dbvec!=0) && ((*(short *)linux_dbvec)!=-1)) \
+	       sp_enter_debugger(); \
+		       } while(0)
+
+enum die_val {
+	DIE_UNUSED,
+};
+
+#endif /* !(__ASSEMBLY__) */
+
+/* Some nice offset defines for assembler code. */
+#define KDEBUG_ENTRY_OFF    0x0
+#define KDEBUG_DUNNO_OFF    0x4
+#define KDEBUG_DUNNO2_OFF   0x8
+#define KDEBUG_TEACH_OFF    0xc
+
+#endif /* !(_SPARC_KDEBUG_H) */