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, 299 insertions, 0 deletions

diff --git a/include/asm-m32r/system.h b/include/asm-m32r/system.h
new file mode 100644
index 00000000000..73348c3f858
--- /dev/null
+++ b/include/asm-m32r/system.h
@@ -0,0 +1,299 @@
+#ifndef _ASM_M32R_SYSTEM_H
+#define _ASM_M32R_SYSTEM_H
+
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2001  by Hiroyuki Kondo, Hirokazu Takata, and Hitoshi Yamamoto
+ * Copyright (C) 2004  Hirokazu Takata <takata at linux-m32r.org>
+ */
+
+#include <linux/config.h>
+
+#ifdef __KERNEL__
+
+/*
+ * switch_to(prev, next) should switch from task `prev' to `next'
+ * `prev' will never be the same as `next'.
+ *
+ * `next' and `prev' should be struct task_struct, but it isn't always defined
+ */
+
+#ifndef CONFIG_SMP
+#define prepare_to_switch()  do { } while(0)
+#endif	/* not CONFIG_SMP */
+
+#define switch_to(prev, next, last)  do { \
+	register unsigned long  arg0 __asm__ ("r0") = (unsigned long)prev; \
+	register unsigned long  arg1 __asm__ ("r1") = (unsigned long)next; \
+	register unsigned long  *oldsp __asm__ ("r2") = &(prev->thread.sp); \
+	register unsigned long  *newsp __asm__ ("r3") = &(next->thread.sp); \
+	register unsigned long  *oldlr __asm__ ("r4") = &(prev->thread.lr); \
+	register unsigned long  *newlr __asm__ ("r5") = &(next->thread.lr); \
+	register struct task_struct  *__last __asm__ ("r6"); \
+	__asm__ __volatile__ ( \
+		"st     r8, @-r15                                 \n\t" \
+		"st     r9, @-r15                                 \n\t" \
+		"st    r10, @-r15                                 \n\t" \
+		"st    r11, @-r15                                 \n\t" \
+		"st    r12, @-r15                                 \n\t" \
+		"st    r13, @-r15                                 \n\t" \
+		"st    r14, @-r15                                 \n\t" \
+		"seth  r14, #high(1f)                             \n\t" \
+		"or3   r14, r14, #low(1f)                         \n\t" \
+		"st    r14, @r4    ; store old LR                 \n\t" \
+		"st    r15, @r2    ; store old SP                 \n\t" \
+		"ld    r15, @r3    ; load new SP                  \n\t" \
+		"st     r0, @-r15  ; store 'prev' onto new stack  \n\t" \
+		"ld    r14, @r5    ; load new LR                  \n\t" \
+		"jmp   r14                                        \n\t" \
+		".fillinsn                                        \n  " \
+		"1:                                               \n\t" \
+		"ld     r6, @r15+  ; load 'prev' from new stack   \n\t" \
+		"ld    r14, @r15+                                 \n\t" \
+		"ld    r13, @r15+                                 \n\t" \
+		"ld    r12, @r15+                                 \n\t" \
+		"ld    r11, @r15+                                 \n\t" \
+		"ld    r10, @r15+                                 \n\t" \
+		"ld     r9, @r15+                                 \n\t" \
+		"ld     r8, @r15+                                 \n\t" \
+		: "=&r" (__last) \
+		: "r" (arg0), "r" (arg1), "r" (oldsp), "r" (newsp), \
+		  "r" (oldlr), "r" (newlr) \
+		: "memory" \
+	); \
+	last = __last; \
+} while(0)
+
+/* Interrupt Control */
+#if !defined(CONFIG_CHIP_M32102)
+#define local_irq_enable() \
+	__asm__ __volatile__ ("setpsw #0x40 -> nop": : :"memory")
+#define local_irq_disable() \
+	__asm__ __volatile__ ("clrpsw #0x40 -> nop": : :"memory")
+#else	/* CONFIG_CHIP_M32102 */
+static inline void local_irq_enable(void)
+{
+	unsigned long tmpreg;
+	__asm__ __volatile__(
+		"mvfc	%0, psw;		\n\t"
+		"or3	%0, %0, #0x0040;	\n\t"
+		"mvtc	%0, psw;		\n\t"
+	: "=&r" (tmpreg) : : "cbit", "memory");
+}
+
+static inline void local_irq_disable(void)
+{
+	unsigned long tmpreg0, tmpreg1;
+	__asm__ __volatile__(
+		"ld24	%0, #0	; Use 32-bit insn. \n\t"
+		"mvfc	%1, psw	; No interrupt can be accepted here. \n\t"
+		"mvtc	%0, psw	\n\t"
+		"and3	%0, %1, #0xffbf	\n\t"
+		"mvtc	%0, psw	\n\t"
+	: "=&r" (tmpreg0), "=&r" (tmpreg1) : : "cbit", "memory");
+}
+#endif	/* CONFIG_CHIP_M32102 */
+
+#define local_save_flags(x) \
+	__asm__ __volatile__("mvfc %0,psw" : "=r"(x) : /* no input */)
+
+#define local_irq_restore(x) \
+	__asm__ __volatile__("mvtc %0,psw" : /* no outputs */ \
+		: "r" (x) : "cbit", "memory")
+
+#if !defined(CONFIG_CHIP_M32102)
+#define local_irq_save(x)				\
+	__asm__ __volatile__(				\
+  		"mvfc	%0, psw;		\n\t"	\
+	  	"clrpsw	#0x40 -> nop;		\n\t"	\
+  		: "=r" (x) : /* no input */ : "memory")
+#else	/* CONFIG_CHIP_M32102 */
+#define local_irq_save(x) 				\
+	({						\
+		unsigned long tmpreg;			\
+		__asm__ __volatile__( 			\
+			"ld24	%1, #0 \n\t" 		\
+			"mvfc	%0, psw \n\t"		\
+			"mvtc	%1, psw \n\t"		\
+			"and3	%1, %0, #0xffbf \n\t"	\
+			"mvtc	%1, psw \n\t" 		\
+			: "=r" (x), "=&r" (tmpreg)	\
+			: : "cbit", "memory");		\
+	})
+#endif	/* CONFIG_CHIP_M32102 */
+
+#define irqs_disabled()					\
+	({						\
+		unsigned long flags;			\
+		local_save_flags(flags);		\
+		!(flags & 0x40);			\
+	})
+
+#endif  /* __KERNEL__ */
+
+#define nop()	__asm__ __volatile__ ("nop" : : )
+
+#define xchg(ptr,x) \
+	((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr))))
+
+#define tas(ptr)	(xchg((ptr),1))
+
+#ifdef CONFIG_SMP
+extern void  __xchg_called_with_bad_pointer(void);
+#endif
+
+#ifdef CONFIG_CHIP_M32700_TS1
+#define DCACHE_CLEAR(reg0, reg1, addr)				\
+	"seth	"reg1", #high(dcache_dummy);		\n\t"	\
+	"or3	"reg1", "reg1", #low(dcache_dummy);	\n\t"	\
+	"lock	"reg0", @"reg1";			\n\t"	\
+	"add3	"reg0", "addr", #0x1000;		\n\t"	\
+	"ld	"reg0", @"reg0";			\n\t"	\
+	"add3	"reg0", "addr", #0x2000;		\n\t"	\
+	"ld	"reg0", @"reg0";			\n\t"	\
+	"unlock	"reg0", @"reg1";			\n\t"
+	/* FIXME: This workaround code cannot handle kenrel modules
+	 * correctly under SMP environment.
+	 */
+#else	/* CONFIG_CHIP_M32700_TS1 */
+#define DCACHE_CLEAR(reg0, reg1, addr)
+#endif	/* CONFIG_CHIP_M32700_TS1 */
+
+static __inline__ unsigned long __xchg(unsigned long x, volatile void * ptr,
+	int size)
+{
+	unsigned long flags;
+	unsigned long tmp = 0;
+
+	local_irq_save(flags);
+
+	switch (size) {
+#ifndef CONFIG_SMP
+	case 1:
+		__asm__ __volatile__ (
+			"ldb	%0, @%2 \n\t"
+			"stb	%1, @%2 \n\t"
+			: "=&r" (tmp) : "r" (x), "r" (ptr) : "memory");
+		break;
+	case 2:
+		__asm__ __volatile__ (
+			"ldh	%0, @%2 \n\t"
+			"sth	%1, @%2 \n\t"
+			: "=&r" (tmp) : "r" (x), "r" (ptr) : "memory");
+		break;
+	case 4:
+		__asm__ __volatile__ (
+			"ld	%0, @%2 \n\t"
+			"st	%1, @%2 \n\t"
+			: "=&r" (tmp) : "r" (x), "r" (ptr) : "memory");
+		break;
+#else  /* CONFIG_SMP */
+	case 4:
+		__asm__ __volatile__ (
+			DCACHE_CLEAR("%0", "r4", "%2")
+			"lock	%0, @%2;	\n\t"
+			"unlock	%1, @%2;	\n\t"
+			: "=&r" (tmp) : "r" (x), "r" (ptr)
+			: "memory"
+#ifdef CONFIG_CHIP_M32700_TS1
+			, "r4"
+#endif	/* CONFIG_CHIP_M32700_TS1 */
+		);
+		break;
+	default:
+		__xchg_called_with_bad_pointer();
+#endif  /* CONFIG_SMP */
+	}
+
+	local_irq_restore(flags);
+
+	return (tmp);
+}
+
+/*
+ * Memory barrier.
+ *
+ * mb() prevents loads and stores being reordered across this point.
+ * rmb() prevents loads being reordered across this point.
+ * wmb() prevents stores being reordered across this point.
+ */
+#define mb()   barrier()
+#define rmb()  mb()
+#define wmb()  mb()
+
+/**
+ * read_barrier_depends - Flush all pending reads that subsequents reads
+ * depend on.
+ *
+ * No data-dependent reads from memory-like regions are ever reordered
+ * over this barrier.  All reads preceding this primitive are guaranteed
+ * to access memory (but not necessarily other CPUs' caches) before any
+ * reads following this primitive that depend on the data return by
+ * any of the preceding reads.  This primitive is much lighter weight than
+ * rmb() on most CPUs, and is never heavier weight than is
+ * rmb().
+ *
+ * These ordering constraints are respected by both the local CPU
+ * and the compiler.
+ *
+ * Ordering is not guaranteed by anything other than these primitives,
+ * not even by data dependencies.  See the documentation for
+ * memory_barrier() for examples and URLs to more information.
+ *
+ * For example, the following code would force ordering (the initial
+ * value of "a" is zero, "b" is one, and "p" is "&a"):
+ *
+ * <programlisting>
+ *      CPU 0                           CPU 1
+ *
+ *      b = 2;
+ *      memory_barrier();
+ *      p = &b;                         q = p;
+ *                                      read_barrier_depends();
+ *                                      d = *q;
+ * </programlisting>
+ *
+ *
+ * because the read of "*q" depends on the read of "p" and these
+ * two reads are separated by a read_barrier_depends().  However,
+ * the following code, with the same initial values for "a" and "b":
+ *
+ * <programlisting>
+ *      CPU 0                           CPU 1
+ *
+ *      a = 2;
+ *      memory_barrier();
+ *      b = 3;                          y = b;
+ *                                      read_barrier_depends();
+ *                                      x = a;
+ * </programlisting>
+ *
+ * does not enforce ordering, since there is no data dependency between
+ * the read of "a" and the read of "b".  Therefore, on some CPUs, such
+ * as Alpha, "y" could be set to 3 and "x" to 0.  Use rmb()
+ * in cases like thiswhere there are no data dependencies.
+ **/
+
+#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)
+
+#define arch_align_stack(x) (x)
+
+#endif  /* _ASM_M32R_SYSTEM_H */