Linux-2.6.12-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, 264 insertions, 0 deletions

diff --git a/include/asm-sh/system.h b/include/asm-sh/system.h
new file mode 100644
index 000000000000..28a3c2d8bcd7
--- /dev/null
+++ b/include/asm-sh/system.h
@@ -0,0 +1,264 @@
+#ifndef __ASM_SH_SYSTEM_H
+#define __ASM_SH_SYSTEM_H
+
+/*
+ * Copyright (C) 1999, 2000  Niibe Yutaka  &  Kaz Kojima
+ * Copyright (C) 2002 Paul Mundt
+ */
+
+#include <linux/config.h>
+
+/*
+ *	switch_to() should switch tasks to task nr n, first
+ */
+
+#define switch_to(prev, next, last) do {				\
+ task_t *__last;							\
+ register unsigned long *__ts1 __asm__ ("r1") = &prev->thread.sp;	\
+ register unsigned long *__ts2 __asm__ ("r2") = &prev->thread.pc;	\
+ register unsigned long *__ts4 __asm__ ("r4") = (unsigned long *)prev;	\
+ register unsigned long *__ts5 __asm__ ("r5") = (unsigned long *)next;	\
+ register unsigned long *__ts6 __asm__ ("r6") = &next->thread.sp;	\
+ register unsigned long __ts7 __asm__ ("r7") = next->thread.pc;		\
+ __asm__ __volatile__ (".balign 4\n\t" 					\
+		       "stc.l	gbr, @-r15\n\t" 			\
+		       "sts.l	pr, @-r15\n\t" 				\
+		       "mov.l	r8, @-r15\n\t" 				\
+		       "mov.l	r9, @-r15\n\t" 				\
+		       "mov.l	r10, @-r15\n\t" 			\
+		       "mov.l	r11, @-r15\n\t" 			\
+		       "mov.l	r12, @-r15\n\t" 			\
+		       "mov.l	r13, @-r15\n\t" 			\
+		       "mov.l	r14, @-r15\n\t" 			\
+		       "mov.l	r15, @r1	! save SP\n\t"		\
+		       "mov.l	@r6, r15	! change to new stack\n\t" \
+		       "mova	1f, %0\n\t" 				\
+		       "mov.l	%0, @r2		! save PC\n\t" 		\
+		       "mov.l	2f, %0\n\t" 				\
+		       "jmp	@%0		! call __switch_to\n\t" \
+		       " lds	r7, pr		!  with return to new PC\n\t" \
+		       ".balign	4\n"					\
+		       "2:\n\t"						\
+		       ".long	__switch_to\n"				\
+		       "1:\n\t"						\
+		       "mov.l	@r15+, r14\n\t"				\
+		       "mov.l	@r15+, r13\n\t"				\
+		       "mov.l	@r15+, r12\n\t"				\
+		       "mov.l	@r15+, r11\n\t"				\
+		       "mov.l	@r15+, r10\n\t"				\
+		       "mov.l	@r15+, r9\n\t"				\
+		       "mov.l	@r15+, r8\n\t"				\
+		       "lds.l	@r15+, pr\n\t"				\
+		       "ldc.l	@r15+, gbr\n\t"				\
+		       : "=z" (__last)					\
+		       : "r" (__ts1), "r" (__ts2), "r" (__ts4), 	\
+			 "r" (__ts5), "r" (__ts6), "r" (__ts7) 		\
+		       : "r3", "t");					\
+	last = __last;							\
+} while (0)
+
+#define nop() __asm__ __volatile__ ("nop")
+
+
+#define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))
+
+static __inline__ unsigned long tas(volatile int *m)
+{ /* #define tas(ptr) (xchg((ptr),1)) */
+	unsigned long retval;
+
+	__asm__ __volatile__ ("tas.b	@%1\n\t"
+			      "movt	%0"
+			      : "=r" (retval): "r" (m): "t", "memory");
+	return retval;
+}
+
+extern void __xchg_called_with_bad_pointer(void);
+
+#define mb()	__asm__ __volatile__ ("": : :"memory")
+#define rmb()	mb()
+#define wmb()	__asm__ __volatile__ ("": : :"memory")
+#define read_barrier_depends()	do { } 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 set_mb(var, value) do { xchg(&var, value); } while (0)
+#define set_wmb(var, value) do { var = value; wmb(); } while (0)
+
+/* Interrupt Control */
+static __inline__ void local_irq_enable(void)
+{
+	unsigned long __dummy0, __dummy1;
+
+	__asm__ __volatile__("stc	sr, %0\n\t"
+			     "and	%1, %0\n\t"
+			     "stc	r6_bank, %1\n\t"
+			     "or	%1, %0\n\t"
+			     "ldc	%0, sr"
+			     : "=&r" (__dummy0), "=r" (__dummy1)
+			     : "1" (~0x000000f0)
+			     : "memory");
+}
+
+static __inline__ void local_irq_disable(void)
+{
+	unsigned long __dummy;
+	__asm__ __volatile__("stc	sr, %0\n\t"
+			     "or	#0xf0, %0\n\t"
+			     "ldc	%0, sr"
+			     : "=&z" (__dummy)
+			     : /* no inputs */
+			     : "memory");
+}
+
+#define local_save_flags(x) \
+	__asm__("stc sr, %0; and #0xf0, %0" : "=&z" (x) :/**/: "memory" )
+
+#define irqs_disabled()			\
+({					\
+	unsigned long flags;		\
+	local_save_flags(flags);	\
+	(flags != 0);			\
+})
+
+static __inline__ unsigned long local_irq_save(void)
+{
+	unsigned long flags, __dummy;
+
+	__asm__ __volatile__("stc	sr, %1\n\t"
+			     "mov	%1, %0\n\t"
+			     "or	#0xf0, %0\n\t"
+			     "ldc	%0, sr\n\t"
+			     "mov	%1, %0\n\t"
+			     "and	#0xf0, %0"
+			     : "=&z" (flags), "=&r" (__dummy)
+			     :/**/
+			     : "memory" );
+	return flags;
+}
+
+#ifdef DEBUG_CLI_STI
+static __inline__ void  local_irq_restore(unsigned long x)
+{
+	if ((x & 0x000000f0) != 0x000000f0)
+		local_irq_enable();
+	else {
+		unsigned long flags;
+		local_save_flags(flags);
+
+		if (flags == 0) {
+			extern void dump_stack(void);
+			printk(KERN_ERR "BUG!\n");
+			dump_stack();
+			local_irq_disable();
+		}
+	}
+}
+#else
+#define local_irq_restore(x) do { 			\
+	if ((x & 0x000000f0) != 0x000000f0)		\
+		local_irq_enable();				\
+} while (0)
+#endif
+
+#define really_restore_flags(x) do { 			\
+	if ((x & 0x000000f0) != 0x000000f0)		\
+		local_irq_enable();				\
+	else						\
+		local_irq_disable();				\
+} while (0)
+
+/*
+ * Jump to P2 area.
+ * When handling TLB or caches, we need to do it from P2 area.
+ */
+#define jump_to_P2()			\
+do {					\
+	unsigned long __dummy;		\
+	__asm__ __volatile__(		\
+		"mov.l	1f, %0\n\t"	\
+		"or	%1, %0\n\t"	\
+		"jmp	@%0\n\t"	\
+		" nop\n\t" 		\
+		".balign 4\n"		\
+		"1:	.long 2f\n"	\
+		"2:"			\
+		: "=&r" (__dummy)	\
+		: "r" (0x20000000));	\
+} while (0)
+
+/*
+ * Back to P1 area.
+ */
+#define back_to_P1()					\
+do {							\
+	unsigned long __dummy;				\
+	__asm__ __volatile__(				\
+		"nop;nop;nop;nop;nop;nop;nop\n\t"	\
+		"mov.l	1f, %0\n\t"			\
+		"jmp	@%0\n\t"			\
+		" nop\n\t"				\
+		".balign 4\n"				\
+		"1:	.long 2f\n"			\
+		"2:"					\
+		: "=&r" (__dummy));			\
+} while (0)
+
+/* For spinlocks etc */
+#define local_irq_save(x)	x = local_irq_save()
+
+static __inline__ unsigned long xchg_u32(volatile int * m, unsigned long val)
+{
+	unsigned long flags, retval;
+
+	local_irq_save(flags);
+	retval = *m;
+	*m = val;
+	local_irq_restore(flags);
+	return retval;
+}
+
+static __inline__ unsigned long xchg_u8(volatile unsigned char * m, unsigned long val)
+{
+	unsigned long flags, retval;
+
+	local_irq_save(flags);
+	retval = *m;
+	*m = val & 0xff;
+	local_irq_restore(flags);
+	return retval;
+}
+
+static __inline__ unsigned long __xchg(unsigned long x, volatile void * ptr, int size)
+{
+	switch (size) {
+	case 4:
+		return xchg_u32(ptr, x);
+		break;
+	case 1:
+		return xchg_u8(ptr, x);
+		break;
+	}
+	__xchg_called_with_bad_pointer();
+	return x;
+}
+
+/* XXX
+ * disable hlt during certain critical i/o operations
+ */
+#define HAVE_DISABLE_HLT
+void disable_hlt(void);
+void enable_hlt(void);
+
+#define arch_align_stack(x) (x)
+
+#endif